[v3,3/4] pinctrl: cygnus: add initial IOMUX driver support
diff mbox

Message ID 1422928894-20716-4-git-send-email-rjui@broadcom.com
State New
Headers show

Commit Message

Ray Jui Feb. 3, 2015, 2:01 a.m. UTC
This adds the initial driver support for the Broadcom Cygnus IOMUX
controller. The Cygnus IOMUX controller supports group based mux
configuration but allows certain pins to be muxed to GPIO individually

Signed-off-by: Ray Jui <rjui@broadcom.com>
Reviewed-by: Scott Branden <sbranden@broadcom.com>
---
 drivers/pinctrl/bcm/Kconfig              |   13 +
 drivers/pinctrl/bcm/Makefile             |    5 +-
 drivers/pinctrl/bcm/pinctrl-cygnus-mux.c | 1087 ++++++++++++++++++++++++++++++
 3 files changed, 1103 insertions(+), 2 deletions(-)
 create mode 100644 drivers/pinctrl/bcm/pinctrl-cygnus-mux.c

Comments

Dmitry Torokhov Feb. 3, 2015, 5:40 p.m. UTC | #1
Hi Ray,

On Mon, Feb 02, 2015 at 06:01:33PM -0800, Ray Jui wrote:
> This adds the initial driver support for the Broadcom Cygnus IOMUX
> controller. The Cygnus IOMUX controller supports group based mux
> configuration but allows certain pins to be muxed to GPIO individually
> 
> Signed-off-by: Ray Jui <rjui@broadcom.com>
> Reviewed-by: Scott Branden <sbranden@broadcom.com>

Just a few random nits/comments...

> ---
>  drivers/pinctrl/bcm/Kconfig              |   13 +
>  drivers/pinctrl/bcm/Makefile             |    5 +-
>  drivers/pinctrl/bcm/pinctrl-cygnus-mux.c | 1087 ++++++++++++++++++++++++++++++
>  3 files changed, 1103 insertions(+), 2 deletions(-)
>  create mode 100644 drivers/pinctrl/bcm/pinctrl-cygnus-mux.c
> 
> diff --git a/drivers/pinctrl/bcm/Kconfig b/drivers/pinctrl/bcm/Kconfig
> index bc6d048..eb13201 100644
> --- a/drivers/pinctrl/bcm/Kconfig
> +++ b/drivers/pinctrl/bcm/Kconfig
> @@ -19,3 +19,16 @@ config PINCTRL_BCM2835
>  	bool
>  	select PINMUX
>  	select PINCONF
> +
> +config PINCTRL_CYGNUS_MUX
> +	bool "Broadcom Cygnus IOMUX driver"
> +	depends on (ARCH_BCM_CYGNUS || COMPILE_TEST)
> +	select PINMUX
> +	select GENERIC_PINCONF
> +	default ARCH_BCM_CYGNUS
> +	help
> +	  Say yes here to enable the Broadcom Cygnus IOMUX driver.
> +
> +	  The Broadcom Cygnus IOMUX driver supports group based IOMUX
> +	  configuration, with the exception that certain individual pins
> +	  can be overrided to GPIO function
> diff --git a/drivers/pinctrl/bcm/Makefile b/drivers/pinctrl/bcm/Makefile
> index 7ba80a3..bb6beb6 100644
> --- a/drivers/pinctrl/bcm/Makefile
> +++ b/drivers/pinctrl/bcm/Makefile
> @@ -1,4 +1,5 @@
>  # Broadcom pinctrl support
>  
> -obj-$(CONFIG_PINCTRL_BCM281XX)	+= pinctrl-bcm281xx.o
> -obj-$(CONFIG_PINCTRL_BCM2835)	+= pinctrl-bcm2835.o
> +obj-$(CONFIG_PINCTRL_BCM281XX)		+= pinctrl-bcm281xx.o
> +obj-$(CONFIG_PINCTRL_BCM2835)		+= pinctrl-bcm2835.o
> +obj-$(CONFIG_PINCTRL_CYGNUS_MUX)	+= pinctrl-cygnus-mux.o
> diff --git a/drivers/pinctrl/bcm/pinctrl-cygnus-mux.c b/drivers/pinctrl/bcm/pinctrl-cygnus-mux.c
> new file mode 100644
> index 0000000..33565b4
> --- /dev/null
> +++ b/drivers/pinctrl/bcm/pinctrl-cygnus-mux.c
> @@ -0,0 +1,1087 @@
> +/* Copyright (C) 2014-2015 Broadcom Corporation
> + *
> + * This program is free software; you can redistribute it and/or
> + * modify it under the terms of the GNU General Public License as
> + * published by the Free Software Foundation version 2.
> + *
> + * This program is distributed "as is" WITHOUT ANY WARRANTY of any
> + * kind, whether express or implied; without even the implied warranty
> + * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
> + * GNU General Public License for more details.
> + *
> + * This file contains the Cygnus IOMUX driver that supports group based PINMUX
> + * configuration. Although PINMUX configuration is mainly group based, the
> + * Cygnus IOMUX controller allows certain pins to be individually muxed to GPIO
> + * function, and therefore be controlled by the Cygnus ASIU GPIO controller
> + */
> +
> +#include <linux/err.h>
> +#include <linux/io.h>
> +#include <linux/module.h>
> +#include <linux/of.h>
> +#include <linux/slab.h>
> +#include <linux/platform_device.h>
> +#include <linux/pinctrl/pinctrl.h>
> +#include <linux/pinctrl/pinmux.h>
> +#include <linux/pinctrl/pinconf.h>
> +#include <linux/pinctrl/pinconf-generic.h>
> +#include "../core.h"
> +#include "../pinctrl-utils.h"
> +
> +#define CYGNUS_NUM_IOMUX_REGS     8
> +#define CYGNUS_NUM_MUX_PER_REG    8
> +#define CYGNUS_NUM_IOMUX          (CYGNUS_NUM_IOMUX_REGS * \
> +				   CYGNUS_NUM_MUX_PER_REG)
> +
> +/*
> + * Cygnus IOMUX register description
> + *
> + * @offset: register offset for mux configuration of a group
> + * @shift: bit shift for mux configuration of a group
> + * @alt: alternate function to set to
> + */
> +struct cygnus_mux {
> +	unsigned int offset;
> +	unsigned int shift;
> +	unsigned int alt;
> +};
> +
> +/*
> + * Keep track of Cygnus IOMUX configuration and prevent double configuration
> + *
> + * @cygnus_mux: Cygnus IOMUX register description
> + * @is_configured: flag to indicate whether a mux setting has already been
> + * configured
> + */
> +struct cygnus_mux_log {
> +	struct cygnus_mux mux;
> +	bool is_configured;
> +};
> +
> +/*
> + * Group based IOMUX configuration
> + *
> + * @name: name of the group
> + * @pins: array of pins used by this group
> + * @num_pins: total number of pins used by this group
> + * @mux: Cygnus group based IOMUX configuration
> + */
> +struct cygnus_pin_group {
> +	const char *name;
> +	const unsigned *pins;
> +	const unsigned num_pins;
> +	const struct cygnus_mux mux;

Not: the last 2 consts are quite weird - if you want to make an instance
of cygnus_pin_group immutable you declare it as a const (and I see you
are already doing that below). With the structure as it laid out
currently you can only do static initializers.

> +};
> +
> +/*
> + * Cygnus mux function and supported pin groups
> + *
> + * @name: name of the function
> + * @groups: array of groups that can be supported by this function
> + * @num_groups: total number of groups that can be supported by this function
> + */
> +struct cygnus_pin_function {
> +	const char *name;
> +	const char * const *groups;
> +	const unsigned num_groups;

Here as well.

...

> +
> +/*
> + * List of pins in Cygnus
> + */
> +static struct cygnus_pin cygnus_pins[] = {

const?

> +	CYGNUS_PIN_DESC(0, "ext_device_reset_n", 0, 0, 0),
> +	CYGNUS_PIN_DESC(1, "chip_mode0", 0, 0, 0),

...

> +#define CYGNUS_PIN_GROUP(group_name, off, sh, al)	\
> +{							\
> +	.name = #group_name"""_grp",			\

Why do we need extra pair of quotes? BTW we can also do

	.name = __stringify(group_name) "_grp",

> +	.pins = group_name ## _pins,			\
> +	.num_pins = ARRAY_SIZE(group_name ## _pins),	\
> +	.mux = {					\
> +		.offset = off,				\
> +		.shift = sh,				\
> +		.alt = al,				\
> +	}						\
> +}

...

> +
> +static struct pinctrl_ops cygnus_pinctrl_ops = {

const?

> +	.get_groups_count = cygnus_get_groups_count,
> +	.get_group_name = cygnus_get_group_name,
> +	.get_group_pins = cygnus_get_group_pins,
> +	.pin_dbg_show = cygnus_pin_dbg_show,
> +	.dt_node_to_map = cygnus_dt_node_to_map,
> +	.dt_free_map = pinctrl_utils_dt_free_map,
> +};
> +
> +static int cygnus_get_functions_count(struct pinctrl_dev *pctrl_dev)
> +{
> +	struct cygnus_pinctrl *pinctrl = pinctrl_dev_get_drvdata(pctrl_dev);
> +
> +	return pinctrl->num_functions;
> +}
> +
> +static const char *cygnus_get_function_name(struct pinctrl_dev *pctrl_dev,
> +					    unsigned selector)
> +{
> +	struct cygnus_pinctrl *pinctrl = pinctrl_dev_get_drvdata(pctrl_dev);
> +
> +	return pinctrl->functions[selector].name;
> +}
> +
> +static int cygnus_get_function_groups(struct pinctrl_dev *pctrl_dev,
> +				      unsigned selector,
> +				      const char * const **groups,
> +				      unsigned * const num_groups)
> +{
> +	struct cygnus_pinctrl *pinctrl = pinctrl_dev_get_drvdata(pctrl_dev);
> +
> +	*groups = pinctrl->functions[selector].groups;
> +	*num_groups = pinctrl->functions[selector].num_groups;
> +
> +	return 0;
> +}
> +
> +static int cygnus_pinmux_set(struct cygnus_pinctrl *pinctrl,
> +			     const struct cygnus_pin_function *func,
> +			     const struct cygnus_pin_group *grp,
> +			     struct cygnus_mux_log *mux_log)
> +{
> +	const struct cygnus_mux *mux = &grp->mux;
> +	int i;
> +	u32 val, mask = 0x7;
> +	unsigned long flags;
> +
> +	for (i = 0; i < CYGNUS_NUM_IOMUX; i++) {
> +		if (mux->offset != mux_log[i].mux.offset ||
> +		    mux->shift != mux_log[i].mux.shift)
> +			continue;
> +
> +		/* match found if we reach here */
> +
> +		/* if this is a new configuration, just do it! */
> +		if (!mux_log[i].is_configured)
> +			break;
> +
> +		/*
> +		 * IOMUX has been configured previously and one is trying to
> +		 * configure it to a different function
> +		 */
> +		if (mux_log[i].mux.alt != mux->alt) {
> +			dev_err(pinctrl->dev,
> +				"double configuration error detected!\n");
> +			dev_err(pinctrl->dev, "func:%s grp:%s\n",
> +				func->name, grp->name);
> +			return -EINVAL;
> +		} else {
> +			/*
> +			 * One tries to configure it to the same function.
> +			 * Just quit and don't bother
> +			 */
> +			return 0;
> +		}
> +	}
> +
> +	mux_log[i].mux.alt = mux->alt;
> +	mux_log[i].is_configured = true;
> +
> +	spin_lock_irqsave(&pinctrl->lock, flags);
> +
> +	val = readl(pinctrl->base0 + grp->mux.offset);
> +	val &= ~(mask << grp->mux.shift);
> +	val |= grp->mux.alt << grp->mux.shift;
> +	writel(val, pinctrl->base0 + grp->mux.offset);
> +
> +	spin_unlock_irqrestore(&pinctrl->lock, flags);
> +
> +	return 0;
> +}
> +
> +static int cygnus_pinmux_set_mux(struct pinctrl_dev *pctrl_dev,
> +				 unsigned func_select, unsigned grp_select)
> +{
> +	struct cygnus_pinctrl *pinctrl = pinctrl_dev_get_drvdata(pctrl_dev);
> +	const struct cygnus_pin_function *func =
> +		&pinctrl->functions[func_select];
> +	const struct cygnus_pin_group *grp = &pinctrl->groups[grp_select];
> +
> +	dev_dbg(pctrl_dev->dev, "func:%u name:%s grp:%u name:%s\n",
> +		func_select, func->name, grp_select, grp->name);
> +
> +	dev_dbg(pctrl_dev->dev, "offset:0x%08x shift:%u alt:%u\n",
> +		grp->mux.offset, grp->mux.shift, grp->mux.alt);
> +
> +	return cygnus_pinmux_set(pinctrl, func, grp, pinctrl->mux_log);
> +}
> +
> +static int cygnus_gpio_request_enable(struct pinctrl_dev *pctrl_dev,
> +				      struct pinctrl_gpio_range *range,
> +				      unsigned pin)
> +{
> +	struct cygnus_pinctrl *pinctrl = pinctrl_dev_get_drvdata(pctrl_dev);
> +	struct cygnus_gpio_mux *mux = pctrl_dev->desc->pins[pin].drv_data;

const?

> +	u32 val;
> +	unsigned long flags;
> +
> +	/* not all pins support GPIO pinmux override */
> +	if (!mux->is_supported)
> +		return -ENOTSUPP;
> +
> +	spin_lock_irqsave(&pinctrl->lock, flags);
> +
> +	val = readl(pinctrl->base1 + mux->offset);
> +	val |= 0x3 << mux->shift;
> +	writel(val, pinctrl->base1 + mux->offset);
> +
> +	spin_unlock_irqrestore(&pinctrl->lock, flags);
> +
> +	dev_dbg(pctrl_dev->dev,
> +		"gpio request enable pin=%u offset=0x%x shift=%u\n",
> +		pin, mux->offset, mux->shift);
> +
> +	return 0;
> +}
> +
> +static void cygnus_gpio_disable_free(struct pinctrl_dev *pctrl_dev,
> +				     struct pinctrl_gpio_range *range,
> +				     unsigned pin)
> +{
> +	struct cygnus_pinctrl *pinctrl = pinctrl_dev_get_drvdata(pctrl_dev);
> +	struct cygnus_gpio_mux *mux = pctrl_dev->desc->pins[pin].drv_data;
> +	u32 val;
> +	unsigned long flags;
> +
> +	if (!mux->is_supported)
> +		return;
> +
> +	spin_lock_irqsave(&pinctrl->lock, flags);
> +
> +	val = readl(pinctrl->base1 + mux->offset);
> +	val &= ~(0x3 << mux->shift);
> +	writel(val, pinctrl->base1 + mux->offset);
> +
> +	spin_unlock_irqrestore(&pinctrl->lock, flags);
> +
> +	dev_err(pctrl_dev->dev,
> +		"gpio disable free pin=%u offset=0x%x shift=%u\n",
> +		pin, mux->offset, mux->shift);
> +}
> +
> +static struct pinmux_ops cygnus_pinmux_ops = {

const?

> +	.get_functions_count = cygnus_get_functions_count,
> +	.get_function_name = cygnus_get_function_name,
> +	.get_function_groups = cygnus_get_function_groups,
> +	.set_mux = cygnus_pinmux_set_mux,
> +	.gpio_request_enable = cygnus_gpio_request_enable,
> +	.gpio_disable_free = cygnus_gpio_disable_free,
> +};
> +
> +static struct pinctrl_desc cygnus_pinctrl_desc = {
> +	.name = "cygnus-pinmux",
> +	.pctlops = &cygnus_pinctrl_ops,
> +	.pmxops = &cygnus_pinmux_ops,
> +};
> +
> +static int cygnus_mux_log_init(struct cygnus_pinctrl *pinctrl)
> +{
> +	struct cygnus_mux_log *log;
> +	unsigned int i, j;
> +
> +	pinctrl->mux_log = devm_kcalloc(pinctrl->dev, CYGNUS_NUM_IOMUX,
> +					sizeof(struct cygnus_mux_log),
> +					GFP_KERNEL);
> +	if (!pinctrl->mux_log)
> +		return -ENOMEM;
> +
> +	log = pinctrl->mux_log;
> +	for (i = 0; i < CYGNUS_NUM_IOMUX_REGS; i++) {
> +		for (j = 0; j < CYGNUS_NUM_MUX_PER_REG; j++) {
> +			log = &pinctrl->mux_log[i * CYGNUS_NUM_MUX_PER_REG
> +				+ j];
> +			log->mux.offset = i * 4;
> +			log->mux.shift = j * 4;
> +			log->mux.alt = 0;
> +			log->is_configured = false;
> +		}
> +	}
> +
> +	return 0;
> +}
> +
> +static int cygnus_pinmux_probe(struct platform_device *pdev)
> +{
> +	struct cygnus_pinctrl *pinctrl;
> +	struct resource *res;
> +	int i, ret;
> +	struct pinctrl_pin_desc *pins;
> +	unsigned num_pins = ARRAY_SIZE(cygnus_pins);
> +
> +	pinctrl = devm_kzalloc(&pdev->dev, sizeof(*pinctrl), GFP_KERNEL);
> +	if (!pinctrl)
> +		return -ENOMEM;
> +
> +	pinctrl->dev = &pdev->dev;
> +	platform_set_drvdata(pdev, pinctrl);
> +	spin_lock_init(&pinctrl->lock);
> +
> +	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> +	pinctrl->base0 = devm_ioremap_resource(&pdev->dev, res);
> +	if (IS_ERR(pinctrl->base0)) {
> +		dev_err(&pdev->dev, "unable to map I/O space\n");
> +		return PTR_ERR(pinctrl->base0);
> +	}
> +
> +	res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
> +	pinctrl->base1 = devm_ioremap_resource(&pdev->dev, res);
> +	if (IS_ERR(pinctrl->base1)) {
> +		dev_err(&pdev->dev, "unable to map I/O space\n");
> +		return PTR_ERR(pinctrl->base1);
> +	}
> +
> +	ret = cygnus_mux_log_init(pinctrl);
> +	if (ret) {
> +		dev_err(&pdev->dev, "unable to initialize IOMUX log\n");
> +		return ret;
> +	}
> +
> +	pins = devm_kcalloc(&pdev->dev, num_pins, sizeof(*pins), GFP_KERNEL);
> +	if (!pins)
> +		return -ENOMEM;
> +
> +	for (i = 0; i < num_pins; i++) {
> +		pins[i].number = cygnus_pins[i].pin;
> +		pins[i].name = cygnus_pins[i].name;
> +		pins[i].drv_data = &cygnus_pins[i].gpio_mux;
> +	}
> +
> +	pinctrl->groups = cygnus_pin_groups;
> +	pinctrl->num_groups = ARRAY_SIZE(cygnus_pin_groups);
> +	pinctrl->functions = cygnus_pin_functions;
> +	pinctrl->num_functions = ARRAY_SIZE(cygnus_pin_functions);
> +	cygnus_pinctrl_desc.pins = pins;
> +	cygnus_pinctrl_desc.npins = num_pins;
> +
> +	pinctrl->pctl = pinctrl_register(&cygnus_pinctrl_desc, &pdev->dev,
> +			pinctrl);
> +	if (!pinctrl->pctl) {
> +		dev_err(&pdev->dev, "unable to register Cygnus IOMUX pinctrl\n");
> +		return -EINVAL;
> +	}
> +
> +	return 0;
> +}
> +
> +static struct of_device_id cygnus_pinmux_of_match[] = {
> +	{ .compatible = "brcm,cygnus-pinmux" },
> +	{ }
> +};
> +
> +static struct platform_driver cygnus_pinmux_driver = {
> +	.driver = {
> +		.name = "cygnus-pinmux",
> +		.of_match_table = cygnus_pinmux_of_match,
> +	},
> +	.probe = cygnus_pinmux_probe,

You also need to either provide remove() method or disallow unbinding
via sysfs by setting suppress_bind_attrs in platform driver.

> +};
> +
> +static int __init cygnus_pinmux_init(void)
> +{
> +	return platform_driver_register(&cygnus_pinmux_driver);
> +}
> +arch_initcall(cygnus_pinmux_init);
> +
> +MODULE_AUTHOR("Ray Jui <rjui@broadcom.com>");
> +MODULE_DESCRIPTION("Broadcom Cygnus IOMUX driver");
> +MODULE_LICENSE("GPL v2");
> -- 
> 1.7.9.5
> 

Thanks.
Ray Jui Feb. 3, 2015, 7:29 p.m. UTC | #2
On 2/3/2015 9:40 AM, Dmitry Torokhov wrote:
> Hi Ray,
> 
> On Mon, Feb 02, 2015 at 06:01:33PM -0800, Ray Jui wrote:
>> This adds the initial driver support for the Broadcom Cygnus IOMUX
>> controller. The Cygnus IOMUX controller supports group based mux
>> configuration but allows certain pins to be muxed to GPIO individually
>>
>> Signed-off-by: Ray Jui <rjui@broadcom.com>
>> Reviewed-by: Scott Branden <sbranden@broadcom.com>
> 
> Just a few random nits/comments...
> 
>> ---
>>  drivers/pinctrl/bcm/Kconfig              |   13 +
>>  drivers/pinctrl/bcm/Makefile             |    5 +-
>>  drivers/pinctrl/bcm/pinctrl-cygnus-mux.c | 1087 ++++++++++++++++++++++++++++++
>>  3 files changed, 1103 insertions(+), 2 deletions(-)
>>  create mode 100644 drivers/pinctrl/bcm/pinctrl-cygnus-mux.c
>>
>> diff --git a/drivers/pinctrl/bcm/Kconfig b/drivers/pinctrl/bcm/Kconfig
>> index bc6d048..eb13201 100644
>> --- a/drivers/pinctrl/bcm/Kconfig
>> +++ b/drivers/pinctrl/bcm/Kconfig
>> @@ -19,3 +19,16 @@ config PINCTRL_BCM2835
>>  	bool
>>  	select PINMUX
>>  	select PINCONF
>> +
>> +config PINCTRL_CYGNUS_MUX
>> +	bool "Broadcom Cygnus IOMUX driver"
>> +	depends on (ARCH_BCM_CYGNUS || COMPILE_TEST)
>> +	select PINMUX
>> +	select GENERIC_PINCONF
>> +	default ARCH_BCM_CYGNUS
>> +	help
>> +	  Say yes here to enable the Broadcom Cygnus IOMUX driver.
>> +
>> +	  The Broadcom Cygnus IOMUX driver supports group based IOMUX
>> +	  configuration, with the exception that certain individual pins
>> +	  can be overrided to GPIO function
>> diff --git a/drivers/pinctrl/bcm/Makefile b/drivers/pinctrl/bcm/Makefile
>> index 7ba80a3..bb6beb6 100644
>> --- a/drivers/pinctrl/bcm/Makefile
>> +++ b/drivers/pinctrl/bcm/Makefile
>> @@ -1,4 +1,5 @@
>>  # Broadcom pinctrl support
>>  
>> -obj-$(CONFIG_PINCTRL_BCM281XX)	+= pinctrl-bcm281xx.o
>> -obj-$(CONFIG_PINCTRL_BCM2835)	+= pinctrl-bcm2835.o
>> +obj-$(CONFIG_PINCTRL_BCM281XX)		+= pinctrl-bcm281xx.o
>> +obj-$(CONFIG_PINCTRL_BCM2835)		+= pinctrl-bcm2835.o
>> +obj-$(CONFIG_PINCTRL_CYGNUS_MUX)	+= pinctrl-cygnus-mux.o
>> diff --git a/drivers/pinctrl/bcm/pinctrl-cygnus-mux.c b/drivers/pinctrl/bcm/pinctrl-cygnus-mux.c
>> new file mode 100644
>> index 0000000..33565b4
>> --- /dev/null
>> +++ b/drivers/pinctrl/bcm/pinctrl-cygnus-mux.c
>> @@ -0,0 +1,1087 @@
>> +/* Copyright (C) 2014-2015 Broadcom Corporation
>> + *
>> + * This program is free software; you can redistribute it and/or
>> + * modify it under the terms of the GNU General Public License as
>> + * published by the Free Software Foundation version 2.
>> + *
>> + * This program is distributed "as is" WITHOUT ANY WARRANTY of any
>> + * kind, whether express or implied; without even the implied warranty
>> + * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
>> + * GNU General Public License for more details.
>> + *
>> + * This file contains the Cygnus IOMUX driver that supports group based PINMUX
>> + * configuration. Although PINMUX configuration is mainly group based, the
>> + * Cygnus IOMUX controller allows certain pins to be individually muxed to GPIO
>> + * function, and therefore be controlled by the Cygnus ASIU GPIO controller
>> + */
>> +
>> +#include <linux/err.h>
>> +#include <linux/io.h>
>> +#include <linux/module.h>
>> +#include <linux/of.h>
>> +#include <linux/slab.h>
>> +#include <linux/platform_device.h>
>> +#include <linux/pinctrl/pinctrl.h>
>> +#include <linux/pinctrl/pinmux.h>
>> +#include <linux/pinctrl/pinconf.h>
>> +#include <linux/pinctrl/pinconf-generic.h>
>> +#include "../core.h"
>> +#include "../pinctrl-utils.h"
>> +
>> +#define CYGNUS_NUM_IOMUX_REGS     8
>> +#define CYGNUS_NUM_MUX_PER_REG    8
>> +#define CYGNUS_NUM_IOMUX          (CYGNUS_NUM_IOMUX_REGS * \
>> +				   CYGNUS_NUM_MUX_PER_REG)
>> +
>> +/*
>> + * Cygnus IOMUX register description
>> + *
>> + * @offset: register offset for mux configuration of a group
>> + * @shift: bit shift for mux configuration of a group
>> + * @alt: alternate function to set to
>> + */
>> +struct cygnus_mux {
>> +	unsigned int offset;
>> +	unsigned int shift;
>> +	unsigned int alt;
>> +};
>> +
>> +/*
>> + * Keep track of Cygnus IOMUX configuration and prevent double configuration
>> + *
>> + * @cygnus_mux: Cygnus IOMUX register description
>> + * @is_configured: flag to indicate whether a mux setting has already been
>> + * configured
>> + */
>> +struct cygnus_mux_log {
>> +	struct cygnus_mux mux;
>> +	bool is_configured;
>> +};
>> +
>> +/*
>> + * Group based IOMUX configuration
>> + *
>> + * @name: name of the group
>> + * @pins: array of pins used by this group
>> + * @num_pins: total number of pins used by this group
>> + * @mux: Cygnus group based IOMUX configuration
>> + */
>> +struct cygnus_pin_group {
>> +	const char *name;
>> +	const unsigned *pins;
>> +	const unsigned num_pins;
>> +	const struct cygnus_mux mux;
> 
> Not: the last 2 consts are quite weird - if you want to make an instance
> of cygnus_pin_group immutable you declare it as a const (and I see you
> are already doing that below). With the structure as it laid out
> currently you can only do static initializers.
> 
Right. I'll remove the last two const.

>> +};
>> +
>> +/*
>> + * Cygnus mux function and supported pin groups
>> + *
>> + * @name: name of the function
>> + * @groups: array of groups that can be supported by this function
>> + * @num_groups: total number of groups that can be supported by this function
>> + */
>> +struct cygnus_pin_function {
>> +	const char *name;
>> +	const char * const *groups;
>> +	const unsigned num_groups;
> 
> Here as well.
> 
> ...
> 
Yes. Will remove the last const.

>> +
>> +/*
>> + * List of pins in Cygnus
>> + */
>> +static struct cygnus_pin cygnus_pins[] = {
> 
> const?
> 
I cannot make it const here, since the address of "gpio_mux" is later
passed to pinctrl_pin_desc's private data:

pins[i].drv_data = &cygnus_pins[i].gpio_mux;

>> +	CYGNUS_PIN_DESC(0, "ext_device_reset_n", 0, 0, 0),
>> +	CYGNUS_PIN_DESC(1, "chip_mode0", 0, 0, 0),
> 
> ...
> 
>> +#define CYGNUS_PIN_GROUP(group_name, off, sh, al)	\
>> +{							\
>> +	.name = #group_name"""_grp",			\
> 
> Why do we need extra pair of quotes? BTW we can also do
> 
> 	.name = __stringify(group_name) "_grp",
> 
Okay. I will change to use __stringify. Thanks.

>> +	.pins = group_name ## _pins,			\
>> +	.num_pins = ARRAY_SIZE(group_name ## _pins),	\
>> +	.mux = {					\
>> +		.offset = off,				\
>> +		.shift = sh,				\
>> +		.alt = al,				\
>> +	}						\
>> +}
> 
> ...
> 
>> +
>> +static struct pinctrl_ops cygnus_pinctrl_ops = {
> 
> const?
> 
Yes.

>> +	.get_groups_count = cygnus_get_groups_count,
>> +	.get_group_name = cygnus_get_group_name,
>> +	.get_group_pins = cygnus_get_group_pins,
>> +	.pin_dbg_show = cygnus_pin_dbg_show,
>> +	.dt_node_to_map = cygnus_dt_node_to_map,
>> +	.dt_free_map = pinctrl_utils_dt_free_map,
>> +};
>> +
>> +static int cygnus_get_functions_count(struct pinctrl_dev *pctrl_dev)
>> +{
>> +	struct cygnus_pinctrl *pinctrl = pinctrl_dev_get_drvdata(pctrl_dev);
>> +
>> +	return pinctrl->num_functions;
>> +}
>> +
>> +static const char *cygnus_get_function_name(struct pinctrl_dev *pctrl_dev,
>> +					    unsigned selector)
>> +{
>> +	struct cygnus_pinctrl *pinctrl = pinctrl_dev_get_drvdata(pctrl_dev);
>> +
>> +	return pinctrl->functions[selector].name;
>> +}
>> +
>> +static int cygnus_get_function_groups(struct pinctrl_dev *pctrl_dev,
>> +				      unsigned selector,
>> +				      const char * const **groups,
>> +				      unsigned * const num_groups)
>> +{
>> +	struct cygnus_pinctrl *pinctrl = pinctrl_dev_get_drvdata(pctrl_dev);
>> +
>> +	*groups = pinctrl->functions[selector].groups;
>> +	*num_groups = pinctrl->functions[selector].num_groups;
>> +
>> +	return 0;
>> +}
>> +
>> +static int cygnus_pinmux_set(struct cygnus_pinctrl *pinctrl,
>> +			     const struct cygnus_pin_function *func,
>> +			     const struct cygnus_pin_group *grp,
>> +			     struct cygnus_mux_log *mux_log)
>> +{
>> +	const struct cygnus_mux *mux = &grp->mux;
>> +	int i;
>> +	u32 val, mask = 0x7;
>> +	unsigned long flags;
>> +
>> +	for (i = 0; i < CYGNUS_NUM_IOMUX; i++) {
>> +		if (mux->offset != mux_log[i].mux.offset ||
>> +		    mux->shift != mux_log[i].mux.shift)
>> +			continue;
>> +
>> +		/* match found if we reach here */
>> +
>> +		/* if this is a new configuration, just do it! */
>> +		if (!mux_log[i].is_configured)
>> +			break;
>> +
>> +		/*
>> +		 * IOMUX has been configured previously and one is trying to
>> +		 * configure it to a different function
>> +		 */
>> +		if (mux_log[i].mux.alt != mux->alt) {
>> +			dev_err(pinctrl->dev,
>> +				"double configuration error detected!\n");
>> +			dev_err(pinctrl->dev, "func:%s grp:%s\n",
>> +				func->name, grp->name);
>> +			return -EINVAL;
>> +		} else {
>> +			/*
>> +			 * One tries to configure it to the same function.
>> +			 * Just quit and don't bother
>> +			 */
>> +			return 0;
>> +		}
>> +	}
>> +
>> +	mux_log[i].mux.alt = mux->alt;
>> +	mux_log[i].is_configured = true;
>> +
>> +	spin_lock_irqsave(&pinctrl->lock, flags);
>> +
>> +	val = readl(pinctrl->base0 + grp->mux.offset);
>> +	val &= ~(mask << grp->mux.shift);
>> +	val |= grp->mux.alt << grp->mux.shift;
>> +	writel(val, pinctrl->base0 + grp->mux.offset);
>> +
>> +	spin_unlock_irqrestore(&pinctrl->lock, flags);
>> +
>> +	return 0;
>> +}
>> +
>> +static int cygnus_pinmux_set_mux(struct pinctrl_dev *pctrl_dev,
>> +				 unsigned func_select, unsigned grp_select)
>> +{
>> +	struct cygnus_pinctrl *pinctrl = pinctrl_dev_get_drvdata(pctrl_dev);
>> +	const struct cygnus_pin_function *func =
>> +		&pinctrl->functions[func_select];
>> +	const struct cygnus_pin_group *grp = &pinctrl->groups[grp_select];
>> +
>> +	dev_dbg(pctrl_dev->dev, "func:%u name:%s grp:%u name:%s\n",
>> +		func_select, func->name, grp_select, grp->name);
>> +
>> +	dev_dbg(pctrl_dev->dev, "offset:0x%08x shift:%u alt:%u\n",
>> +		grp->mux.offset, grp->mux.shift, grp->mux.alt);
>> +
>> +	return cygnus_pinmux_set(pinctrl, func, grp, pinctrl->mux_log);
>> +}
>> +
>> +static int cygnus_gpio_request_enable(struct pinctrl_dev *pctrl_dev,
>> +				      struct pinctrl_gpio_range *range,
>> +				      unsigned pin)
>> +{
>> +	struct cygnus_pinctrl *pinctrl = pinctrl_dev_get_drvdata(pctrl_dev);
>> +	struct cygnus_gpio_mux *mux = pctrl_dev->desc->pins[pin].drv_data;
> 
> const?
> 
Yes.

>> +	u32 val;
>> +	unsigned long flags;
>> +
>> +	/* not all pins support GPIO pinmux override */
>> +	if (!mux->is_supported)
>> +		return -ENOTSUPP;
>> +
>> +	spin_lock_irqsave(&pinctrl->lock, flags);
>> +
>> +	val = readl(pinctrl->base1 + mux->offset);
>> +	val |= 0x3 << mux->shift;
>> +	writel(val, pinctrl->base1 + mux->offset);
>> +
>> +	spin_unlock_irqrestore(&pinctrl->lock, flags);
>> +
>> +	dev_dbg(pctrl_dev->dev,
>> +		"gpio request enable pin=%u offset=0x%x shift=%u\n",
>> +		pin, mux->offset, mux->shift);
>> +
>> +	return 0;
>> +}
>> +
>> +static void cygnus_gpio_disable_free(struct pinctrl_dev *pctrl_dev,
>> +				     struct pinctrl_gpio_range *range,
>> +				     unsigned pin)
>> +{
>> +	struct cygnus_pinctrl *pinctrl = pinctrl_dev_get_drvdata(pctrl_dev);
>> +	struct cygnus_gpio_mux *mux = pctrl_dev->desc->pins[pin].drv_data;
>> +	u32 val;
>> +	unsigned long flags;
>> +
>> +	if (!mux->is_supported)
>> +		return;
>> +
>> +	spin_lock_irqsave(&pinctrl->lock, flags);
>> +
>> +	val = readl(pinctrl->base1 + mux->offset);
>> +	val &= ~(0x3 << mux->shift);
>> +	writel(val, pinctrl->base1 + mux->offset);
>> +
>> +	spin_unlock_irqrestore(&pinctrl->lock, flags);
>> +
>> +	dev_err(pctrl_dev->dev,
>> +		"gpio disable free pin=%u offset=0x%x shift=%u\n",
>> +		pin, mux->offset, mux->shift);
>> +}
>> +
>> +static struct pinmux_ops cygnus_pinmux_ops = {
> 
> const?
> 
Yes.

>> +	.get_functions_count = cygnus_get_functions_count,
>> +	.get_function_name = cygnus_get_function_name,
>> +	.get_function_groups = cygnus_get_function_groups,
>> +	.set_mux = cygnus_pinmux_set_mux,
>> +	.gpio_request_enable = cygnus_gpio_request_enable,
>> +	.gpio_disable_free = cygnus_gpio_disable_free,
>> +};
>> +
>> +static struct pinctrl_desc cygnus_pinctrl_desc = {
>> +	.name = "cygnus-pinmux",
>> +	.pctlops = &cygnus_pinctrl_ops,
>> +	.pmxops = &cygnus_pinmux_ops,
>> +};
>> +
>> +static int cygnus_mux_log_init(struct cygnus_pinctrl *pinctrl)
>> +{
>> +	struct cygnus_mux_log *log;
>> +	unsigned int i, j;
>> +
>> +	pinctrl->mux_log = devm_kcalloc(pinctrl->dev, CYGNUS_NUM_IOMUX,
>> +					sizeof(struct cygnus_mux_log),
>> +					GFP_KERNEL);
>> +	if (!pinctrl->mux_log)
>> +		return -ENOMEM;
>> +
>> +	log = pinctrl->mux_log;
>> +	for (i = 0; i < CYGNUS_NUM_IOMUX_REGS; i++) {
>> +		for (j = 0; j < CYGNUS_NUM_MUX_PER_REG; j++) {
>> +			log = &pinctrl->mux_log[i * CYGNUS_NUM_MUX_PER_REG
>> +				+ j];
>> +			log->mux.offset = i * 4;
>> +			log->mux.shift = j * 4;
>> +			log->mux.alt = 0;
>> +			log->is_configured = false;
>> +		}
>> +	}
>> +
>> +	return 0;
>> +}
>> +
>> +static int cygnus_pinmux_probe(struct platform_device *pdev)
>> +{
>> +	struct cygnus_pinctrl *pinctrl;
>> +	struct resource *res;
>> +	int i, ret;
>> +	struct pinctrl_pin_desc *pins;
>> +	unsigned num_pins = ARRAY_SIZE(cygnus_pins);
>> +
>> +	pinctrl = devm_kzalloc(&pdev->dev, sizeof(*pinctrl), GFP_KERNEL);
>> +	if (!pinctrl)
>> +		return -ENOMEM;
>> +
>> +	pinctrl->dev = &pdev->dev;
>> +	platform_set_drvdata(pdev, pinctrl);
>> +	spin_lock_init(&pinctrl->lock);
>> +
>> +	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
>> +	pinctrl->base0 = devm_ioremap_resource(&pdev->dev, res);
>> +	if (IS_ERR(pinctrl->base0)) {
>> +		dev_err(&pdev->dev, "unable to map I/O space\n");
>> +		return PTR_ERR(pinctrl->base0);
>> +	}
>> +
>> +	res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
>> +	pinctrl->base1 = devm_ioremap_resource(&pdev->dev, res);
>> +	if (IS_ERR(pinctrl->base1)) {
>> +		dev_err(&pdev->dev, "unable to map I/O space\n");
>> +		return PTR_ERR(pinctrl->base1);
>> +	}
>> +
>> +	ret = cygnus_mux_log_init(pinctrl);
>> +	if (ret) {
>> +		dev_err(&pdev->dev, "unable to initialize IOMUX log\n");
>> +		return ret;
>> +	}
>> +
>> +	pins = devm_kcalloc(&pdev->dev, num_pins, sizeof(*pins), GFP_KERNEL);
>> +	if (!pins)
>> +		return -ENOMEM;
>> +
>> +	for (i = 0; i < num_pins; i++) {
>> +		pins[i].number = cygnus_pins[i].pin;
>> +		pins[i].name = cygnus_pins[i].name;
>> +		pins[i].drv_data = &cygnus_pins[i].gpio_mux;
>> +	}
>> +
>> +	pinctrl->groups = cygnus_pin_groups;
>> +	pinctrl->num_groups = ARRAY_SIZE(cygnus_pin_groups);
>> +	pinctrl->functions = cygnus_pin_functions;
>> +	pinctrl->num_functions = ARRAY_SIZE(cygnus_pin_functions);
>> +	cygnus_pinctrl_desc.pins = pins;
>> +	cygnus_pinctrl_desc.npins = num_pins;
>> +
>> +	pinctrl->pctl = pinctrl_register(&cygnus_pinctrl_desc, &pdev->dev,
>> +			pinctrl);
>> +	if (!pinctrl->pctl) {
>> +		dev_err(&pdev->dev, "unable to register Cygnus IOMUX pinctrl\n");
>> +		return -EINVAL;
>> +	}
>> +
>> +	return 0;
>> +}
>> +
>> +static struct of_device_id cygnus_pinmux_of_match[] = {
>> +	{ .compatible = "brcm,cygnus-pinmux" },
>> +	{ }
>> +};
>> +
>> +static struct platform_driver cygnus_pinmux_driver = {
>> +	.driver = {
>> +		.name = "cygnus-pinmux",
>> +		.of_match_table = cygnus_pinmux_of_match,
>> +	},
>> +	.probe = cygnus_pinmux_probe,
> 
> You also need to either provide remove() method or disallow unbinding
> via sysfs by setting suppress_bind_attrs in platform driver.
> 
I do not expect this driver to ever be compiled as module and
uninstalled at runtime. I'll add .suppress_bind_attrs = true, thanks!
>> +};
>> +
>> +static int __init cygnus_pinmux_init(void)
>> +{
>> +	return platform_driver_register(&cygnus_pinmux_driver);
>> +}
>> +arch_initcall(cygnus_pinmux_init);
>> +
>> +MODULE_AUTHOR("Ray Jui <rjui@broadcom.com>");
>> +MODULE_DESCRIPTION("Broadcom Cygnus IOMUX driver");
>> +MODULE_LICENSE("GPL v2");
>> -- 
>> 1.7.9.5
>>
> 
> Thanks.
> 
Thanks for the review!

Ray
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Dmitry Torokhov Feb. 3, 2015, 8 p.m. UTC | #3
On Tue, Feb 03, 2015 at 11:29:36AM -0800, Ray Jui wrote:
> On 2/3/2015 9:40 AM, Dmitry Torokhov wrote:
> > On Mon, Feb 02, 2015 at 06:01:33PM -0800, Ray Jui wrote:
> >> +
> >> +/*
> >> + * List of pins in Cygnus
> >> + */
> >> +static struct cygnus_pin cygnus_pins[] = {
> > 
> > const?
> > 
> I cannot make it const here, since the address of "gpio_mux" is later
> passed to pinctrl_pin_desc's private data:
> 
> pins[i].drv_data = &cygnus_pins[i].gpio_mux;

The pinctrl code says:

"@drv_data: driver-defined per-pin data. pinctrl core does not touch
this"

so we could theoretically cast away the constness and restore it when
we access drv_data in pin control methods, but I won't insist. I am
not sure which way looks nicer.

Thanks.
Ray Jui Feb. 3, 2015, 8:16 p.m. UTC | #4
On 2/3/2015 12:00 PM, Dmitry Torokhov wrote:
> On Tue, Feb 03, 2015 at 11:29:36AM -0800, Ray Jui wrote:
>> On 2/3/2015 9:40 AM, Dmitry Torokhov wrote:
>>> On Mon, Feb 02, 2015 at 06:01:33PM -0800, Ray Jui wrote:
>>>> +
>>>> +/*
>>>> + * List of pins in Cygnus
>>>> + */
>>>> +static struct cygnus_pin cygnus_pins[] = {
>>>
>>> const?
>>>
>> I cannot make it const here, since the address of "gpio_mux" is later
>> passed to pinctrl_pin_desc's private data:
>>
>> pins[i].drv_data = &cygnus_pins[i].gpio_mux;
> 
> The pinctrl code says:
> 
> "@drv_data: driver-defined per-pin data. pinctrl core does not touch
> this"
> 
> so we could theoretically cast away the constness and restore it when
> we access drv_data in pin control methods, but I won't insist. I am
> not sure which way looks nicer.
> 
> Thanks.
> 
Yeah, I agreed that by declaring the cygnus_pins array const, it makes
it more obvious that "we do not expect any of its parameters to change."
But later if we cast &gpio_mux to void * before assigned to drv_data of
pinctrl_pin_desc, we sort of break it up...I'll keep this part of code
as it is for now.

Thanks,

Ray
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Patch
diff mbox

diff --git a/drivers/pinctrl/bcm/Kconfig b/drivers/pinctrl/bcm/Kconfig
index bc6d048..eb13201 100644
--- a/drivers/pinctrl/bcm/Kconfig
+++ b/drivers/pinctrl/bcm/Kconfig
@@ -19,3 +19,16 @@  config PINCTRL_BCM2835
 	bool
 	select PINMUX
 	select PINCONF
+
+config PINCTRL_CYGNUS_MUX
+	bool "Broadcom Cygnus IOMUX driver"
+	depends on (ARCH_BCM_CYGNUS || COMPILE_TEST)
+	select PINMUX
+	select GENERIC_PINCONF
+	default ARCH_BCM_CYGNUS
+	help
+	  Say yes here to enable the Broadcom Cygnus IOMUX driver.
+
+	  The Broadcom Cygnus IOMUX driver supports group based IOMUX
+	  configuration, with the exception that certain individual pins
+	  can be overrided to GPIO function
diff --git a/drivers/pinctrl/bcm/Makefile b/drivers/pinctrl/bcm/Makefile
index 7ba80a3..bb6beb6 100644
--- a/drivers/pinctrl/bcm/Makefile
+++ b/drivers/pinctrl/bcm/Makefile
@@ -1,4 +1,5 @@ 
 # Broadcom pinctrl support
 
-obj-$(CONFIG_PINCTRL_BCM281XX)	+= pinctrl-bcm281xx.o
-obj-$(CONFIG_PINCTRL_BCM2835)	+= pinctrl-bcm2835.o
+obj-$(CONFIG_PINCTRL_BCM281XX)		+= pinctrl-bcm281xx.o
+obj-$(CONFIG_PINCTRL_BCM2835)		+= pinctrl-bcm2835.o
+obj-$(CONFIG_PINCTRL_CYGNUS_MUX)	+= pinctrl-cygnus-mux.o
diff --git a/drivers/pinctrl/bcm/pinctrl-cygnus-mux.c b/drivers/pinctrl/bcm/pinctrl-cygnus-mux.c
new file mode 100644
index 0000000..33565b4
--- /dev/null
+++ b/drivers/pinctrl/bcm/pinctrl-cygnus-mux.c
@@ -0,0 +1,1087 @@ 
+/* Copyright (C) 2014-2015 Broadcom Corporation
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation version 2.
+ *
+ * This program is distributed "as is" WITHOUT ANY WARRANTY of any
+ * kind, whether express or implied; without even the implied warranty
+ * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * This file contains the Cygnus IOMUX driver that supports group based PINMUX
+ * configuration. Although PINMUX configuration is mainly group based, the
+ * Cygnus IOMUX controller allows certain pins to be individually muxed to GPIO
+ * function, and therefore be controlled by the Cygnus ASIU GPIO controller
+ */
+
+#include <linux/err.h>
+#include <linux/io.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/slab.h>
+#include <linux/platform_device.h>
+#include <linux/pinctrl/pinctrl.h>
+#include <linux/pinctrl/pinmux.h>
+#include <linux/pinctrl/pinconf.h>
+#include <linux/pinctrl/pinconf-generic.h>
+#include "../core.h"
+#include "../pinctrl-utils.h"
+
+#define CYGNUS_NUM_IOMUX_REGS     8
+#define CYGNUS_NUM_MUX_PER_REG    8
+#define CYGNUS_NUM_IOMUX          (CYGNUS_NUM_IOMUX_REGS * \
+				   CYGNUS_NUM_MUX_PER_REG)
+
+/*
+ * Cygnus IOMUX register description
+ *
+ * @offset: register offset for mux configuration of a group
+ * @shift: bit shift for mux configuration of a group
+ * @alt: alternate function to set to
+ */
+struct cygnus_mux {
+	unsigned int offset;
+	unsigned int shift;
+	unsigned int alt;
+};
+
+/*
+ * Keep track of Cygnus IOMUX configuration and prevent double configuration
+ *
+ * @cygnus_mux: Cygnus IOMUX register description
+ * @is_configured: flag to indicate whether a mux setting has already been
+ * configured
+ */
+struct cygnus_mux_log {
+	struct cygnus_mux mux;
+	bool is_configured;
+};
+
+/*
+ * Group based IOMUX configuration
+ *
+ * @name: name of the group
+ * @pins: array of pins used by this group
+ * @num_pins: total number of pins used by this group
+ * @mux: Cygnus group based IOMUX configuration
+ */
+struct cygnus_pin_group {
+	const char *name;
+	const unsigned *pins;
+	const unsigned num_pins;
+	const struct cygnus_mux mux;
+};
+
+/*
+ * Cygnus mux function and supported pin groups
+ *
+ * @name: name of the function
+ * @groups: array of groups that can be supported by this function
+ * @num_groups: total number of groups that can be supported by this function
+ */
+struct cygnus_pin_function {
+	const char *name;
+	const char * const *groups;
+	const unsigned num_groups;
+};
+
+/*
+ * Cygnus IOMUX pinctrl core
+ *
+ * @pctl: pointer to pinctrl_dev
+ * @dev: pointer to device
+ * @base0: first I/O register base of the Cygnus IOMUX controller
+ * @base1: second I/O register base
+ * @groups: pointer to array of groups
+ * @num_groups: total number of groups
+ * @functions: pointer to array of functions
+ * @num_functions: total number of functions
+ * @mux_log: pointer to the array of mux logs
+ * @lock: lock to protect register access
+ */
+struct cygnus_pinctrl {
+	struct pinctrl_dev *pctl;
+	struct device *dev;
+	void __iomem *base0;
+	void __iomem *base1;
+
+	const struct cygnus_pin_group *groups;
+	unsigned num_groups;
+
+	const struct cygnus_pin_function *functions;
+	unsigned num_functions;
+
+	struct cygnus_mux_log *mux_log;
+
+	spinlock_t lock;
+};
+
+/*
+ * Certain pins can be individually muxed to GPIO function
+ *
+ * @is_supported: flag to indicate GPIO mux is supported for this pin
+ * @offset: register offset for GPIO mux override of a pin
+ * @shift: bit shift for GPIO mux override of a pin
+ */
+struct cygnus_gpio_mux {
+	int is_supported;
+	unsigned int offset;
+	unsigned int shift;
+};
+
+/*
+ * Description of a pin in Cygnus
+ *
+ * @pin: pin number
+ * @name: pin name
+ * @gpio_mux: GPIO override related information
+ */
+struct cygnus_pin {
+	unsigned pin;
+	char *name;
+	struct cygnus_gpio_mux gpio_mux;
+};
+
+#define CYGNUS_PIN_DESC(p, n, i, o, s)	\
+{					\
+	.pin = p,			\
+	.name = n,			\
+	.gpio_mux = {			\
+		.is_supported = i,	\
+		.offset = o,		\
+		.shift = s,		\
+	},				\
+}
+
+/*
+ * List of pins in Cygnus
+ */
+static struct cygnus_pin cygnus_pins[] = {
+	CYGNUS_PIN_DESC(0, "ext_device_reset_n", 0, 0, 0),
+	CYGNUS_PIN_DESC(1, "chip_mode0", 0, 0, 0),
+	CYGNUS_PIN_DESC(2, "chip_mode1", 0, 0, 0),
+	CYGNUS_PIN_DESC(3, "chip_mode2", 0, 0, 0),
+	CYGNUS_PIN_DESC(4, "chip_mode3", 0, 0, 0),
+	CYGNUS_PIN_DESC(5, "chip_mode4", 0, 0, 0),
+	CYGNUS_PIN_DESC(6, "bsc0_scl", 0, 0, 0),
+	CYGNUS_PIN_DESC(7, "bsc0_sda", 0, 0, 0),
+	CYGNUS_PIN_DESC(8, "bsc1_scl", 0, 0, 0),
+	CYGNUS_PIN_DESC(9, "bsc1_sda", 0, 0, 0),
+	CYGNUS_PIN_DESC(10, "d1w_dq", 1, 0x28, 0),
+	CYGNUS_PIN_DESC(11, "d1wowstz_l", 1, 0x4, 28),
+	CYGNUS_PIN_DESC(12, "gpio0", 0, 0, 0),
+	CYGNUS_PIN_DESC(13, "gpio1", 0, 0, 0),
+	CYGNUS_PIN_DESC(14, "gpio2", 0, 0, 0),
+	CYGNUS_PIN_DESC(15, "gpio3", 0, 0, 0),
+	CYGNUS_PIN_DESC(16, "gpio4", 0, 0, 0),
+	CYGNUS_PIN_DESC(17, "gpio5", 0, 0, 0),
+	CYGNUS_PIN_DESC(18, "gpio6", 0, 0, 0),
+	CYGNUS_PIN_DESC(19, "gpio7", 0, 0, 0),
+	CYGNUS_PIN_DESC(20, "gpio8", 0, 0, 0),
+	CYGNUS_PIN_DESC(21, "gpio9", 0, 0, 0),
+	CYGNUS_PIN_DESC(22, "gpio10", 0, 0, 0),
+	CYGNUS_PIN_DESC(23, "gpio11", 0, 0, 0),
+	CYGNUS_PIN_DESC(24, "gpio12", 0, 0, 0),
+	CYGNUS_PIN_DESC(25, "gpio13", 0, 0, 0),
+	CYGNUS_PIN_DESC(26, "gpio14", 0, 0, 0),
+	CYGNUS_PIN_DESC(27, "gpio15", 0, 0, 0),
+	CYGNUS_PIN_DESC(28, "gpio16", 0, 0, 0),
+	CYGNUS_PIN_DESC(29, "gpio17", 0, 0, 0),
+	CYGNUS_PIN_DESC(30, "gpio18", 0, 0, 0),
+	CYGNUS_PIN_DESC(31, "gpio19", 0, 0, 0),
+	CYGNUS_PIN_DESC(32, "gpio20", 0, 0, 0),
+	CYGNUS_PIN_DESC(33, "gpio21", 0, 0, 0),
+	CYGNUS_PIN_DESC(34, "gpio22", 0, 0, 0),
+	CYGNUS_PIN_DESC(35, "gpio23", 0, 0, 0),
+	CYGNUS_PIN_DESC(36, "mdc", 0, 0, 0),
+	CYGNUS_PIN_DESC(37, "mdio", 0, 0, 0),
+	CYGNUS_PIN_DESC(38, "pwm0", 1, 0x10, 30),
+	CYGNUS_PIN_DESC(39, "pwm1", 1, 0x10, 28),
+	CYGNUS_PIN_DESC(40, "pwm2", 1, 0x10, 26),
+	CYGNUS_PIN_DESC(41, "pwm3", 1, 0x10, 24),
+	CYGNUS_PIN_DESC(42, "sc0_clk", 1, 0x10, 22),
+	CYGNUS_PIN_DESC(43, "sc0_cmdvcc_l", 1, 0x10, 20),
+	CYGNUS_PIN_DESC(44, "sc0_detect", 1, 0x10, 18),
+	CYGNUS_PIN_DESC(45, "sc0_fcb", 1, 0x10, 16),
+	CYGNUS_PIN_DESC(46, "sc0_io", 1, 0x10, 14),
+	CYGNUS_PIN_DESC(47, "sc0_rst_l", 1, 0x10, 12),
+	CYGNUS_PIN_DESC(48, "sc1_clk", 1, 0x10, 10),
+	CYGNUS_PIN_DESC(49, "sc1_cmdvcc_l", 1, 0x10, 8),
+	CYGNUS_PIN_DESC(50, "sc1_detect", 1, 0x10, 6),
+	CYGNUS_PIN_DESC(51, "sc1_fcb", 1, 0x10, 4),
+	CYGNUS_PIN_DESC(52, "sc1_io", 1, 0x10, 2),
+	CYGNUS_PIN_DESC(53, "sc1_rst_l", 1, 0x10, 0),
+	CYGNUS_PIN_DESC(54, "spi0_clk", 1, 0x18, 10),
+	CYGNUS_PIN_DESC(55, "spi0_mosi", 1, 0x18, 6),
+	CYGNUS_PIN_DESC(56, "spi0_miso", 1, 0x18, 8),
+	CYGNUS_PIN_DESC(57, "spi0_ss", 1, 0x18, 4),
+	CYGNUS_PIN_DESC(58, "spi1_clk", 1, 0x18, 2),
+	CYGNUS_PIN_DESC(59, "spi1_mosi", 1, 0x1c, 30),
+	CYGNUS_PIN_DESC(60, "spi1_miso", 1, 0x18, 0),
+	CYGNUS_PIN_DESC(61, "spi1_ss", 1, 0x1c, 28),
+	CYGNUS_PIN_DESC(62, "spi2_clk", 1, 0x1c, 26),
+	CYGNUS_PIN_DESC(63, "spi2_mosi", 1, 0x1c, 22),
+	CYGNUS_PIN_DESC(64, "spi2_miso", 1, 0x1c, 24),
+	CYGNUS_PIN_DESC(65, "spi2_ss", 1, 0x1c, 20),
+	CYGNUS_PIN_DESC(66, "spi3_clk", 1, 0x1c, 18),
+	CYGNUS_PIN_DESC(67, "spi3_mosi", 1, 0x1c, 14),
+	CYGNUS_PIN_DESC(68, "spi3_miso", 1, 0x1c, 16),
+	CYGNUS_PIN_DESC(69, "spi3_ss", 1, 0x1c, 12),
+	CYGNUS_PIN_DESC(70, "uart0_cts", 1, 0x1c, 10),
+	CYGNUS_PIN_DESC(71, "uart0_rts", 1, 0x1c, 8),
+	CYGNUS_PIN_DESC(72, "uart0_rx", 1, 0x1c, 6),
+	CYGNUS_PIN_DESC(73, "uart0_tx", 1, 0x1c, 4),
+	CYGNUS_PIN_DESC(74, "uart1_cts", 1, 0x1c, 2),
+	CYGNUS_PIN_DESC(75, "uart1_dcd", 1, 0x1c, 0),
+	CYGNUS_PIN_DESC(76, "uart1_dsr", 1, 0x20, 14),
+	CYGNUS_PIN_DESC(77, "uart1_dtr", 1, 0x20, 12),
+	CYGNUS_PIN_DESC(78, "uart1_ri", 1, 0x20, 10),
+	CYGNUS_PIN_DESC(79, "uart1_rts", 1, 0x20, 8),
+	CYGNUS_PIN_DESC(80, "uart1_rx", 1, 0x20, 6),
+	CYGNUS_PIN_DESC(81, "uart1_tx", 1, 0x20, 4),
+	CYGNUS_PIN_DESC(82, "uart3_rx", 1, 0x20, 2),
+	CYGNUS_PIN_DESC(83, "uart3_tx", 1, 0x20, 0),
+	CYGNUS_PIN_DESC(84, "sdio1_clk_sdcard", 1, 0x14, 6),
+	CYGNUS_PIN_DESC(85, "sdio1_cmd", 1, 0x14, 4),
+	CYGNUS_PIN_DESC(86, "sdio1_data0", 1, 0x14, 2),
+	CYGNUS_PIN_DESC(87, "sdio1_data1", 1, 0x14, 0),
+	CYGNUS_PIN_DESC(88, "sdio1_data2", 1, 0x18, 30),
+	CYGNUS_PIN_DESC(89, "sdio1_data3", 1, 0x18, 28),
+	CYGNUS_PIN_DESC(90, "sdio1_wp_n", 1, 0x18, 24),
+	CYGNUS_PIN_DESC(91, "sdio1_card_rst", 1, 0x14, 10),
+	CYGNUS_PIN_DESC(92, "sdio1_led_on", 1, 0x18, 26),
+	CYGNUS_PIN_DESC(93, "sdio1_cd", 1, 0x14, 8),
+	CYGNUS_PIN_DESC(94, "sdio0_clk_sdcard", 1, 0x14, 26),
+	CYGNUS_PIN_DESC(95, "sdio0_cmd", 1, 0x14, 24),
+	CYGNUS_PIN_DESC(96, "sdio0_data0", 1, 0x14, 22),
+	CYGNUS_PIN_DESC(97, "sdio0_data1", 1, 0x14, 20),
+	CYGNUS_PIN_DESC(98, "sdio0_data2", 1, 0x14, 18),
+	CYGNUS_PIN_DESC(99, "sdio0_data3", 1, 0x14, 16),
+	CYGNUS_PIN_DESC(100, "sdio0_wp_n", 1, 0x14, 12),
+	CYGNUS_PIN_DESC(101, "sdio0_card_rst", 1, 0x14, 30),
+	CYGNUS_PIN_DESC(102, "sdio0_led_on", 1, 0x14, 14),
+	CYGNUS_PIN_DESC(103, "sdio0_cd", 1, 0x14, 28),
+	CYGNUS_PIN_DESC(104, "sflash_clk", 1, 0x18, 22),
+	CYGNUS_PIN_DESC(105, "sflash_cs_l", 1, 0x18, 20),
+	CYGNUS_PIN_DESC(106, "sflash_mosi", 1, 0x18, 14),
+	CYGNUS_PIN_DESC(107, "sflash_miso", 1, 0x18, 16),
+	CYGNUS_PIN_DESC(108, "sflash_wp_n", 1, 0x18, 12),
+	CYGNUS_PIN_DESC(109, "sflash_hold_n", 1, 0x18, 18),
+	CYGNUS_PIN_DESC(110, "nand_ale", 1, 0xc, 30),
+	CYGNUS_PIN_DESC(111, "nand_ce0_l", 1, 0xc, 28),
+	CYGNUS_PIN_DESC(112, "nand_ce1_l", 1, 0xc, 26),
+	CYGNUS_PIN_DESC(113, "nand_cle", 1, 0xc, 24),
+	CYGNUS_PIN_DESC(114, "nand_dq0", 1, 0xc, 22),
+	CYGNUS_PIN_DESC(115, "nand_dq1", 1, 0xc, 20),
+	CYGNUS_PIN_DESC(116, "nand_dq2", 1, 0xc, 18),
+	CYGNUS_PIN_DESC(117, "nand_dq3", 1, 0xc, 16),
+	CYGNUS_PIN_DESC(118, "nand_dq4", 1, 0xc, 14),
+	CYGNUS_PIN_DESC(119, "nand_dq5", 1, 0xc, 12),
+	CYGNUS_PIN_DESC(120, "nand_dq6", 1, 0xc, 10),
+	CYGNUS_PIN_DESC(121, "nand_dq7", 1, 0xc, 8),
+	CYGNUS_PIN_DESC(122, "nand_rb_l", 1, 0xc, 6),
+	CYGNUS_PIN_DESC(123, "nand_re_l", 1, 0xc, 4),
+	CYGNUS_PIN_DESC(124, "nand_we_l", 1, 0xc, 2),
+	CYGNUS_PIN_DESC(125, "nand_wp_l", 1, 0xc, 0),
+	CYGNUS_PIN_DESC(126, "lcd_clac", 1, 0x4, 26),
+	CYGNUS_PIN_DESC(127, "lcd_clcp", 1, 0x4, 24),
+	CYGNUS_PIN_DESC(128, "lcd_cld0", 1, 0x4, 22),
+	CYGNUS_PIN_DESC(129, "lcd_cld1", 1, 0x4, 0),
+	CYGNUS_PIN_DESC(130, "lcd_cld10", 1, 0x4, 20),
+	CYGNUS_PIN_DESC(131, "lcd_cld11", 1, 0x4, 18),
+	CYGNUS_PIN_DESC(132, "lcd_cld12", 1, 0x4, 16),
+	CYGNUS_PIN_DESC(133, "lcd_cld13", 1, 0x4, 14),
+	CYGNUS_PIN_DESC(134, "lcd_cld14", 1, 0x4, 12),
+	CYGNUS_PIN_DESC(135, "lcd_cld15", 1, 0x4, 10),
+	CYGNUS_PIN_DESC(136, "lcd_cld16", 1, 0x4, 8),
+	CYGNUS_PIN_DESC(137, "lcd_cld17", 1, 0x4, 6),
+	CYGNUS_PIN_DESC(138, "lcd_cld18", 1, 0x4, 4),
+	CYGNUS_PIN_DESC(139, "lcd_cld19", 1, 0x4, 2),
+	CYGNUS_PIN_DESC(140, "lcd_cld2", 1, 0x8, 22),
+	CYGNUS_PIN_DESC(141, "lcd_cld20", 1, 0x8, 30),
+	CYGNUS_PIN_DESC(142, "lcd_cld21", 1, 0x8, 28),
+	CYGNUS_PIN_DESC(143, "lcd_cld22", 1, 0x8, 26),
+	CYGNUS_PIN_DESC(144, "lcd_cld23", 1, 0x8, 24),
+	CYGNUS_PIN_DESC(145, "lcd_cld3", 1, 0x8, 20),
+	CYGNUS_PIN_DESC(146, "lcd_cld4", 1, 0x8, 18),
+	CYGNUS_PIN_DESC(147, "lcd_cld5", 1, 0x8, 16),
+	CYGNUS_PIN_DESC(148, "lcd_cld6", 1, 0x8, 14),
+	CYGNUS_PIN_DESC(149, "lcd_cld7", 1, 0x8, 12),
+	CYGNUS_PIN_DESC(150, "lcd_cld8", 1, 0x8, 10),
+	CYGNUS_PIN_DESC(151, "lcd_cld9", 1, 0x8, 8),
+	CYGNUS_PIN_DESC(152, "lcd_clfp", 1, 0x8, 6),
+	CYGNUS_PIN_DESC(153, "lcd_clle", 1, 0x8, 4),
+	CYGNUS_PIN_DESC(154, "lcd_cllp", 1, 0x8, 2),
+	CYGNUS_PIN_DESC(155, "lcd_clpower", 1, 0x8, 0),
+	CYGNUS_PIN_DESC(156, "camera_vsync", 1, 0x4, 30),
+	CYGNUS_PIN_DESC(157, "camera_trigger", 1, 0x0, 0),
+	CYGNUS_PIN_DESC(158, "camera_strobe", 1, 0x0, 2),
+	CYGNUS_PIN_DESC(159, "camera_standby", 1, 0x0, 4),
+	CYGNUS_PIN_DESC(160, "camera_reset_n", 1, 0x0, 6),
+	CYGNUS_PIN_DESC(161, "camera_pixdata9", 1, 0x0, 8),
+	CYGNUS_PIN_DESC(162, "camera_pixdata8", 1, 0x0, 10),
+	CYGNUS_PIN_DESC(163, "camera_pixdata7", 1, 0x0, 12),
+	CYGNUS_PIN_DESC(164, "camera_pixdata6", 1, 0x0, 14),
+	CYGNUS_PIN_DESC(165, "camera_pixdata5", 1, 0x0, 16),
+	CYGNUS_PIN_DESC(166, "camera_pixdata4", 1, 0x0, 18),
+	CYGNUS_PIN_DESC(167, "camera_pixdata3", 1, 0x0, 20),
+	CYGNUS_PIN_DESC(168, "camera_pixdata2", 1, 0x0, 22),
+	CYGNUS_PIN_DESC(169, "camera_pixdata1", 1, 0x0, 24),
+	CYGNUS_PIN_DESC(170, "camera_pixdata0", 1, 0x0, 26),
+	CYGNUS_PIN_DESC(171, "camera_pixclk", 1, 0x0, 28),
+	CYGNUS_PIN_DESC(172, "camera_hsync", 1, 0x0, 30),
+	CYGNUS_PIN_DESC(173, "camera_pll_ref_clk", 0, 0, 0),
+	CYGNUS_PIN_DESC(174, "usb_id_indication", 0, 0, 0),
+	CYGNUS_PIN_DESC(175, "usb_vbus_indication", 0, 0, 0),
+	CYGNUS_PIN_DESC(176, "gpio0_3p3", 0, 0, 0),
+	CYGNUS_PIN_DESC(177, "gpio1_3p3", 0, 0, 0),
+	CYGNUS_PIN_DESC(178, "gpio2_3p3", 0, 0, 0),
+	CYGNUS_PIN_DESC(179, "gpio3_3p3", 0, 0, 0),
+};
+
+/*
+ * List of groups of pins
+ */
+static const unsigned bsc1_pins[] = { 8, 9 };
+static const unsigned pcie_clkreq_pins[] = { 8, 9 };
+
+static const unsigned i2s2_0_pins[] = { 12 };
+static const unsigned i2s2_1_pins[] = { 13 };
+static const unsigned i2s2_2_pins[] = { 14 };
+static const unsigned i2s2_3_pins[] = { 15 };
+static const unsigned i2s2_4_pins[] = { 16 };
+
+static const unsigned pwm4_pins[] = { 17 };
+static const unsigned pwm5_pins[] = { 18 };
+
+static const unsigned key0_pins[] = { 20 };
+static const unsigned key1_pins[] = { 21 };
+static const unsigned key2_pins[] = { 22 };
+static const unsigned key3_pins[] = { 23 };
+static const unsigned key4_pins[] = { 24 };
+static const unsigned key5_pins[] = { 25 };
+
+static const unsigned key6_pins[] = { 26 };
+static const unsigned audio_dte0_pins[] = { 26 };
+
+static const unsigned key7_pins[] = { 27 };
+static const unsigned audio_dte1_pins[] = { 27 };
+
+static const unsigned key8_pins[] = { 28 };
+static const unsigned key9_pins[] = { 29 };
+static const unsigned key10_pins[] = { 30 };
+static const unsigned key11_pins[] = { 31 };
+static const unsigned key12_pins[] = { 32 };
+static const unsigned key13_pins[] = { 33 };
+
+static const unsigned key14_pins[] = { 34 };
+static const unsigned audio_dte2_pins[] = { 34 };
+
+static const unsigned key15_pins[] = { 35 };
+static const unsigned audio_dte3_pins[] = { 35 };
+
+static const unsigned pwm0_pins[] = { 38 };
+static const unsigned pwm1_pins[] = { 39 };
+static const unsigned pwm2_pins[] = { 40 };
+static const unsigned pwm3_pins[] = { 41 };
+
+static const unsigned sdio0_pins[] = { 94, 95, 96, 97, 98, 99 };
+
+static const unsigned smart_card0_pins[] = { 42, 43, 44, 46, 47 };
+static const unsigned i2s0_0_pins[] = { 42, 43, 44, 46 };
+static const unsigned spdif_pins[] = { 47 };
+
+static const unsigned smart_card1_pins[] = { 48, 49, 50, 52, 53 };
+static const unsigned i2s1_0_pins[] = { 48, 49, 50, 52 };
+
+static const unsigned spi0_pins[] = { 54, 55, 56, 57 };
+
+static const unsigned spi1_pins[] = { 58, 59, 60, 61 };
+
+static const unsigned spi2_pins[] = { 62, 63, 64, 65 };
+
+static const unsigned spi3_pins[] = { 66, 67, 68, 69 };
+static const unsigned sw_led0_0_pins[] = { 66, 67, 68, 69 };
+
+static const unsigned d1w_pins[] = { 10, 11 };
+static const unsigned uart4_pins[] = { 10, 11 };
+static const unsigned sw_led2_0_pins[] = { 10, 11 };
+
+static const unsigned lcd_pins[] = { 126, 127, 128, 129, 130, 131, 132, 133,
+	134, 135, 136, 137, 138, 139, 140, 141, 142, 143, 144, 145, 146, 147,
+	148, 149, 150, 151, 152, 153, 154, 155 };
+static const unsigned sram_0_pins[] = { 126, 127, 128, 129, 130, 131, 132, 133,
+	134, 135, 136, 137, 138, 139, 140, 141, 142, 143, 144, 145, 146, 147,
+	148, 149, 150, 151, 152, 153, 154, 155 };
+static const unsigned spi5_pins[] = { 141, 142, 143, 144 };
+
+static const unsigned uart0_pins[] = { 70, 71, 72, 73 };
+static const unsigned sw_led0_1_pins[] = { 70, 71, 72, 73 };
+
+static const unsigned uart1_dte_pins[] = { 75, 76, 77, 78 };
+static const unsigned uart2_pins[] = { 75, 76, 77, 78 };
+
+static const unsigned uart1_pins[] = { 74, 79, 80, 81 };
+
+static const unsigned uart3_pins[] = { 82, 83 };
+
+static const unsigned qspi_0_pins[] = { 104, 105, 106, 107 };
+
+static const unsigned nand_pins[] = { 110, 111, 112, 113, 114, 115, 116, 117,
+	118, 119, 120, 121, 122, 123, 124, 125 };
+
+static const unsigned sdio0_cd_pins[] = { 103 };
+
+static const unsigned sdio0_mmc_pins[] = { 100, 101, 102 };
+
+static const unsigned sdio1_data_0_pins[] = { 86, 87 };
+static const unsigned can0_pins[] = { 86, 87 };
+static const unsigned spi4_0_pins[] = { 86, 87 };
+
+static const unsigned sdio1_data_1_pins[] = { 88, 89 };
+static const unsigned can1_pins[] = { 88, 89 };
+static const unsigned spi4_1_pins[] = { 88, 89 };
+
+static const unsigned sdio1_cd_pins[] = { 93 };
+
+static const unsigned sdio1_led_pins[] = { 84, 85 };
+static const unsigned sw_led2_1_pins[] = { 84, 85 };
+
+static const unsigned sdio1_mmc_pins[] = { 90, 91, 92 };
+
+static const unsigned cam_led_pins[] = { 156, 157, 158, 159, 160 };
+static const unsigned sw_led1_pins[] = { 156, 157, 158, 159 };
+
+static const unsigned cam_0_pins[] = { 169, 170, 171, 169, 170 };
+
+static const unsigned cam_1_pins[] = { 161, 162, 163, 164, 165, 166, 167,
+	168 };
+static const unsigned sram_1_pins[] = { 161, 162, 163, 164, 165, 166, 167,
+	168 };
+
+static const unsigned qspi_1_pins[] = { 108, 109 };
+
+static const unsigned smart_card0_fcb_pins[] = { 45 };
+static const unsigned i2s0_1_pins[] = { 45 };
+
+static const unsigned smart_card1_fcb_pins[] = { 51 };
+static const unsigned i2s1_1_pins[] = { 51 };
+
+static const unsigned gpio0_3p3_pins[] = { 176 };
+static const unsigned usb0_oc_pins[] = { 176 };
+
+static const unsigned gpio1_3p3_pins[] = { 177 };
+static const unsigned usb1_oc_pins[] = { 177 };
+
+static const unsigned gpio2_3p3_pins[] = { 178 };
+static const unsigned usb2_oc_pins[] = { 178 };
+
+#define CYGNUS_PIN_GROUP(group_name, off, sh, al)	\
+{							\
+	.name = #group_name"""_grp",			\
+	.pins = group_name ## _pins,			\
+	.num_pins = ARRAY_SIZE(group_name ## _pins),	\
+	.mux = {					\
+		.offset = off,				\
+		.shift = sh,				\
+		.alt = al,				\
+	}						\
+}
+
+/*
+ * List of Cygnus pin groups
+ */
+static const struct cygnus_pin_group cygnus_pin_groups[] = {
+	CYGNUS_PIN_GROUP(i2s2_0, 0x0, 0, 2),
+	CYGNUS_PIN_GROUP(i2s2_1, 0x0, 4, 2),
+	CYGNUS_PIN_GROUP(i2s2_2, 0x0, 8, 2),
+	CYGNUS_PIN_GROUP(i2s2_3, 0x0, 12, 2),
+	CYGNUS_PIN_GROUP(i2s2_4, 0x0, 16, 2),
+	CYGNUS_PIN_GROUP(pwm4, 0x0, 20, 0),
+	CYGNUS_PIN_GROUP(pwm5, 0x0, 24, 2),
+	CYGNUS_PIN_GROUP(key0, 0x4, 0, 1),
+	CYGNUS_PIN_GROUP(key1, 0x4, 4, 1),
+	CYGNUS_PIN_GROUP(key2, 0x4, 8, 1),
+	CYGNUS_PIN_GROUP(key3, 0x4, 12, 1),
+	CYGNUS_PIN_GROUP(key4, 0x4, 16, 1),
+	CYGNUS_PIN_GROUP(key5, 0x4, 20, 1),
+	CYGNUS_PIN_GROUP(key6, 0x4, 24, 1),
+	CYGNUS_PIN_GROUP(audio_dte0, 0x4, 24, 2),
+	CYGNUS_PIN_GROUP(key7, 0x4, 28, 1),
+	CYGNUS_PIN_GROUP(audio_dte1, 0x4, 28, 2),
+	CYGNUS_PIN_GROUP(key8, 0x8, 0, 1),
+	CYGNUS_PIN_GROUP(key9, 0x8, 4, 1),
+	CYGNUS_PIN_GROUP(key10, 0x8, 8, 1),
+	CYGNUS_PIN_GROUP(key11, 0x8, 12, 1),
+	CYGNUS_PIN_GROUP(key12, 0x8, 16, 1),
+	CYGNUS_PIN_GROUP(key13, 0x8, 20, 1),
+	CYGNUS_PIN_GROUP(key14, 0x8, 24, 1),
+	CYGNUS_PIN_GROUP(audio_dte2, 0x8, 24, 2),
+	CYGNUS_PIN_GROUP(key15, 0x8, 28, 1),
+	CYGNUS_PIN_GROUP(audio_dte3, 0x8, 28, 2),
+	CYGNUS_PIN_GROUP(pwm0, 0xc, 0, 0),
+	CYGNUS_PIN_GROUP(pwm1, 0xc, 4, 0),
+	CYGNUS_PIN_GROUP(pwm2, 0xc, 8, 0),
+	CYGNUS_PIN_GROUP(pwm3, 0xc, 12, 0),
+	CYGNUS_PIN_GROUP(sdio0, 0xc, 16, 0),
+	CYGNUS_PIN_GROUP(smart_card0, 0xc, 20, 0),
+	CYGNUS_PIN_GROUP(i2s0_0, 0xc, 20, 1),
+	CYGNUS_PIN_GROUP(spdif, 0xc, 20, 1),
+	CYGNUS_PIN_GROUP(smart_card1, 0xc, 24, 0),
+	CYGNUS_PIN_GROUP(i2s1_0, 0xc, 24, 1),
+	CYGNUS_PIN_GROUP(spi0, 0x10, 0, 0),
+	CYGNUS_PIN_GROUP(spi1, 0x10, 4, 0),
+	CYGNUS_PIN_GROUP(spi2, 0x10, 8, 0),
+	CYGNUS_PIN_GROUP(spi3, 0x10, 12, 0),
+	CYGNUS_PIN_GROUP(sw_led0_0, 0x10, 12, 2),
+	CYGNUS_PIN_GROUP(d1w, 0x10, 16, 0),
+	CYGNUS_PIN_GROUP(uart4, 0x10, 16, 1),
+	CYGNUS_PIN_GROUP(sw_led2_0, 0x10, 16, 2),
+	CYGNUS_PIN_GROUP(lcd, 0x10, 20, 0),
+	CYGNUS_PIN_GROUP(sram_0, 0x10, 20, 1),
+	CYGNUS_PIN_GROUP(spi5, 0x10, 20, 2),
+	CYGNUS_PIN_GROUP(uart0, 0x14, 0, 0),
+	CYGNUS_PIN_GROUP(sw_led0_1, 0x14, 0, 2),
+	CYGNUS_PIN_GROUP(uart1_dte, 0x14, 4, 0),
+	CYGNUS_PIN_GROUP(uart2, 0x14, 4, 1),
+	CYGNUS_PIN_GROUP(uart1, 0x14, 8, 0),
+	CYGNUS_PIN_GROUP(uart3, 0x14, 12, 0),
+	CYGNUS_PIN_GROUP(qspi_0, 0x14, 16, 0),
+	CYGNUS_PIN_GROUP(nand, 0x14, 20, 0),
+	CYGNUS_PIN_GROUP(sdio0_cd, 0x18, 0, 0),
+	CYGNUS_PIN_GROUP(sdio0_mmc, 0x18, 4, 0),
+	CYGNUS_PIN_GROUP(sdio1_data_0, 0x18, 8, 0),
+	CYGNUS_PIN_GROUP(can0, 0x18, 8, 1),
+	CYGNUS_PIN_GROUP(spi4_0, 0x18, 8, 2),
+	CYGNUS_PIN_GROUP(sdio1_data_1, 0x18, 12, 0),
+	CYGNUS_PIN_GROUP(can1, 0x18, 12, 1),
+	CYGNUS_PIN_GROUP(spi4_1, 0x18, 12, 2),
+	CYGNUS_PIN_GROUP(sdio1_cd, 0x18, 16, 0),
+	CYGNUS_PIN_GROUP(sdio1_led, 0x18, 20, 0),
+	CYGNUS_PIN_GROUP(sw_led2_1, 0x18, 20, 2),
+	CYGNUS_PIN_GROUP(sdio1_mmc, 0x18, 24, 0),
+	CYGNUS_PIN_GROUP(cam_led, 0x1c, 0, 0),
+	CYGNUS_PIN_GROUP(sw_led1, 0x1c, 0, 1),
+	CYGNUS_PIN_GROUP(cam_0, 0x1c, 4, 0),
+	CYGNUS_PIN_GROUP(cam_1, 0x1c, 8, 0),
+	CYGNUS_PIN_GROUP(sram_1, 0x1c, 8, 1),
+	CYGNUS_PIN_GROUP(qspi_1, 0x1c, 12, 0),
+	CYGNUS_PIN_GROUP(bsc1, 0x1c, 16, 0),
+	CYGNUS_PIN_GROUP(pcie_clkreq, 0x1c, 16, 1),
+	CYGNUS_PIN_GROUP(smart_card0_fcb, 0x20, 0, 0),
+	CYGNUS_PIN_GROUP(i2s0_1, 0x20, 0, 1),
+	CYGNUS_PIN_GROUP(smart_card1_fcb, 0x20, 4, 0),
+	CYGNUS_PIN_GROUP(i2s1_1, 0x20, 4, 1),
+	CYGNUS_PIN_GROUP(gpio0_3p3, 0x28, 0, 0),
+	CYGNUS_PIN_GROUP(usb0_oc, 0x28, 0, 1),
+	CYGNUS_PIN_GROUP(gpio1_3p3, 0x28, 4, 0),
+	CYGNUS_PIN_GROUP(usb1_oc, 0x28, 4, 1),
+	CYGNUS_PIN_GROUP(gpio2_3p3, 0x28, 8, 0),
+	CYGNUS_PIN_GROUP(usb2_oc, 0x28, 8, 1),
+};
+
+/*
+ * List of groups supported by functions
+ */
+static const char * const i2s0_grps[] = { "i2s0_0_grp", "i2s0_1_grp" };
+static const char * const i2s1_grps[] = { "i2s1_0_grp", "i2s1_1_grp" };
+static const char * const i2s2_grps[] = { "i2s2_0_grp", "i2s2_1_grp",
+	"i2s2_2_grp", "i2s2_3_grp", "i2s2_4_grp" };
+static const char * const spdif_grps[] = { "spdif_grp" };
+static const char * const pwm0_grps[] = { "pwm0_grp" };
+static const char * const pwm1_grps[] = { "pwm1_grp" };
+static const char * const pwm2_grps[] = { "pwm2_grp" };
+static const char * const pwm3_grps[] = { "pwm3_grp" };
+static const char * const pwm4_grps[] = { "pwm4_grp" };
+static const char * const pwm5_grps[] = { "pwm5_grp" };
+static const char * const key_grps[] = { "key0_grp", "key1_grp", "key2_grp",
+	"key3_grp", "key4_grp", "key5_grp", "key6_grp", "key7_grp", "key8_grp",
+	"key9_grp", "key10_grp", "key11_grp", "key12_grp", "key13_grp",
+	"key14_grp", "key15_grp" };
+static const char * const audio_dte_grps[] = { "audio_dte0_grp",
+	"audio_dte1_grp", "audio_dte2_grp", "audio_dte3_grp" };
+static const char * const smart_card0_grps[] = { "smart_card0_grp",
+	"smart_card0_fcb_grp" };
+static const char * const smart_card1_grps[] = { "smart_card1_grp",
+	"smart_card1_fcb_grp" };
+static const char * const spi0_grps[] = { "spi0_grp" };
+static const char * const spi1_grps[] = { "spi1_grp" };
+static const char * const spi2_grps[] = { "spi2_grp" };
+static const char * const spi3_grps[] = { "spi3_grp" };
+static const char * const spi4_grps[] = { "spi4_0_grp", "spi4_1_grp" };
+static const char * const spi5_grps[] = { "spi5_grp" };
+
+static const char * const sw_led0_grps[] = { "sw_led0_0_grp",
+	"sw_led0_1_grp" };
+static const char * const sw_led1_grps[] = { "sw_led1_grp" };
+static const char * const sw_led2_grps[] = { "sw_led2_0_grp",
+	"sw_led2_1_grp" };
+static const char * const d1w_grps[] = { "d1w_grp" };
+static const char * const lcd_grps[] = { "lcd_grp" };
+static const char * const sram_grps[] = { "sram_0_grp", "sram_1_grp" };
+
+static const char * const uart0_grps[] = { "uart0_grp" };
+static const char * const uart1_grps[] = { "uart1_grp", "uart1_dte_grp" };
+static const char * const uart2_grps[] = { "uart2_grp" };
+static const char * const uart3_grps[] = { "uart3_grp" };
+static const char * const uart4_grps[] = { "uart4_grp" };
+static const char * const qspi_grps[] = { "qspi_0_grp", "qspi_1_grp" };
+static const char * const nand_grps[] = { "nand_grp" };
+static const char * const sdio0_grps[] = { "sdio0_grp", "sdio0_cd_grp",
+	"sdio0_mmc_grp" };
+static const char * const sdio1_grps[] = { "sdio1_data_0_grp",
+	"sdio1_data_1_grp", "sdio1_cd_grp", "sdio1_led_grp", "sdio1_mmc_grp" };
+static const char * const can0_grps[] = { "can0_grp" };
+static const char * const can1_grps[] = { "can1_grp" };
+static const char * const cam_grps[] = { "cam_led_grp", "cam_0_grp",
+	"cam_1_grp" };
+static const char * const bsc1_grps[] = { "bsc1_grp" };
+static const char * const pcie_clkreq_grps[] = { "pcie_clkreq_grp" };
+static const char * const usb0_oc_grps[] = { "usb0_oc_grp" };
+static const char * const usb1_oc_grps[] = { "usb1_oc_grp" };
+static const char * const usb2_oc_grps[] = { "usb2_oc_grp" };
+
+#define CYGNUS_PIN_FUNCTION(func)				\
+{								\
+	.name = #func,						\
+	.groups = func ## _grps,				\
+	.num_groups = ARRAY_SIZE(func ## _grps),		\
+}
+
+/*
+ * List of supported functions in Cygnus
+ */
+static const struct cygnus_pin_function cygnus_pin_functions[] = {
+	CYGNUS_PIN_FUNCTION(i2s0),
+	CYGNUS_PIN_FUNCTION(i2s1),
+	CYGNUS_PIN_FUNCTION(i2s2),
+	CYGNUS_PIN_FUNCTION(spdif),
+	CYGNUS_PIN_FUNCTION(pwm0),
+	CYGNUS_PIN_FUNCTION(pwm1),
+	CYGNUS_PIN_FUNCTION(pwm2),
+	CYGNUS_PIN_FUNCTION(pwm3),
+	CYGNUS_PIN_FUNCTION(pwm4),
+	CYGNUS_PIN_FUNCTION(pwm5),
+	CYGNUS_PIN_FUNCTION(key),
+	CYGNUS_PIN_FUNCTION(audio_dte),
+	CYGNUS_PIN_FUNCTION(smart_card0),
+	CYGNUS_PIN_FUNCTION(smart_card1),
+	CYGNUS_PIN_FUNCTION(spi0),
+	CYGNUS_PIN_FUNCTION(spi1),
+	CYGNUS_PIN_FUNCTION(spi2),
+	CYGNUS_PIN_FUNCTION(spi3),
+	CYGNUS_PIN_FUNCTION(spi4),
+	CYGNUS_PIN_FUNCTION(spi5),
+	CYGNUS_PIN_FUNCTION(sw_led0),
+	CYGNUS_PIN_FUNCTION(sw_led1),
+	CYGNUS_PIN_FUNCTION(sw_led2),
+	CYGNUS_PIN_FUNCTION(d1w),
+	CYGNUS_PIN_FUNCTION(lcd),
+	CYGNUS_PIN_FUNCTION(sram),
+	CYGNUS_PIN_FUNCTION(uart0),
+	CYGNUS_PIN_FUNCTION(uart1),
+	CYGNUS_PIN_FUNCTION(uart2),
+	CYGNUS_PIN_FUNCTION(uart3),
+	CYGNUS_PIN_FUNCTION(uart4),
+	CYGNUS_PIN_FUNCTION(qspi),
+	CYGNUS_PIN_FUNCTION(nand),
+	CYGNUS_PIN_FUNCTION(sdio0),
+	CYGNUS_PIN_FUNCTION(sdio1),
+	CYGNUS_PIN_FUNCTION(can0),
+	CYGNUS_PIN_FUNCTION(can1),
+	CYGNUS_PIN_FUNCTION(cam),
+	CYGNUS_PIN_FUNCTION(bsc1),
+	CYGNUS_PIN_FUNCTION(pcie_clkreq),
+	CYGNUS_PIN_FUNCTION(usb0_oc),
+	CYGNUS_PIN_FUNCTION(usb1_oc),
+	CYGNUS_PIN_FUNCTION(usb2_oc),
+};
+
+static int cygnus_get_groups_count(struct pinctrl_dev *pctrl_dev)
+{
+	struct cygnus_pinctrl *pinctrl = pinctrl_dev_get_drvdata(pctrl_dev);
+
+	return pinctrl->num_groups;
+}
+
+static const char *cygnus_get_group_name(struct pinctrl_dev *pctrl_dev,
+					 unsigned selector)
+{
+	struct cygnus_pinctrl *pinctrl = pinctrl_dev_get_drvdata(pctrl_dev);
+
+	return pinctrl->groups[selector].name;
+}
+
+static int cygnus_get_group_pins(struct pinctrl_dev *pctrl_dev,
+				 unsigned selector, const unsigned **pins,
+				 unsigned *num_pins)
+{
+	struct cygnus_pinctrl *pinctrl = pinctrl_dev_get_drvdata(pctrl_dev);
+
+	*pins = pinctrl->groups[selector].pins;
+	*num_pins = pinctrl->groups[selector].num_pins;
+
+	return 0;
+}
+
+static void cygnus_pin_dbg_show(struct pinctrl_dev *pctrl_dev,
+				struct seq_file *s, unsigned offset)
+{
+	seq_printf(s, " %s", dev_name(pctrl_dev->dev));
+}
+
+static bool cygnus_function_is_valid(const char *function_name)
+{
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(cygnus_pin_functions); i++) {
+		if (!strcmp(cygnus_pin_functions[i].name, function_name))
+			return true;
+	}
+
+	return false;
+}
+
+/*
+ * TODO: Use API from pinctrl framework once "groups" parsing is supported
+ */
+static int cygnus_dt_node_to_map(struct pinctrl_dev *pctrl_dev,
+				 struct device_node *np,
+				 struct pinctrl_map **map,
+				 unsigned *num_maps)
+{
+	int ret, num_groups;
+	unsigned reserved_maps = 0;
+	struct property *prop;
+	const char *group_name, *function_name;
+
+	*map = NULL;
+	*num_maps = 0;
+
+	num_groups = of_property_count_strings(np, "groups");
+	if (num_groups < 0) {
+		dev_err(pctrl_dev->dev, "could not parse property groups\n");
+		return -EINVAL;
+	}
+
+	ret = of_property_read_string(np, "function", &function_name);
+	if (ret < 0) {
+		dev_err(pctrl_dev->dev,	"could not parse property function\n");
+		return -EINVAL;
+	}
+
+	/* check if it's a valid function */
+	if (!cygnus_function_is_valid(function_name)) {
+		dev_warn(pctrl_dev->dev, "invalid function name: %s\n",
+				function_name);
+	}
+
+	ret = pinctrl_utils_reserve_map(pctrl_dev, map, &reserved_maps,
+			num_maps, num_groups);
+	if (ret) {
+		dev_err(pctrl_dev->dev, "unable to reserve map\n");
+		return ret;
+	}
+
+	of_property_for_each_string(np, "groups", prop, group_name) {
+		ret = pinctrl_utils_add_map_mux(pctrl_dev, map,
+				&reserved_maps, num_maps, group_name,
+				function_name);
+		if (ret) {
+			dev_err(pctrl_dev->dev, "can't add map: %d\n", ret);
+			return ret;
+		}
+	}
+
+	return 0;
+}
+
+static struct pinctrl_ops cygnus_pinctrl_ops = {
+	.get_groups_count = cygnus_get_groups_count,
+	.get_group_name = cygnus_get_group_name,
+	.get_group_pins = cygnus_get_group_pins,
+	.pin_dbg_show = cygnus_pin_dbg_show,
+	.dt_node_to_map = cygnus_dt_node_to_map,
+	.dt_free_map = pinctrl_utils_dt_free_map,
+};
+
+static int cygnus_get_functions_count(struct pinctrl_dev *pctrl_dev)
+{
+	struct cygnus_pinctrl *pinctrl = pinctrl_dev_get_drvdata(pctrl_dev);
+
+	return pinctrl->num_functions;
+}
+
+static const char *cygnus_get_function_name(struct pinctrl_dev *pctrl_dev,
+					    unsigned selector)
+{
+	struct cygnus_pinctrl *pinctrl = pinctrl_dev_get_drvdata(pctrl_dev);
+
+	return pinctrl->functions[selector].name;
+}
+
+static int cygnus_get_function_groups(struct pinctrl_dev *pctrl_dev,
+				      unsigned selector,
+				      const char * const **groups,
+				      unsigned * const num_groups)
+{
+	struct cygnus_pinctrl *pinctrl = pinctrl_dev_get_drvdata(pctrl_dev);
+
+	*groups = pinctrl->functions[selector].groups;
+	*num_groups = pinctrl->functions[selector].num_groups;
+
+	return 0;
+}
+
+static int cygnus_pinmux_set(struct cygnus_pinctrl *pinctrl,
+			     const struct cygnus_pin_function *func,
+			     const struct cygnus_pin_group *grp,
+			     struct cygnus_mux_log *mux_log)
+{
+	const struct cygnus_mux *mux = &grp->mux;
+	int i;
+	u32 val, mask = 0x7;
+	unsigned long flags;
+
+	for (i = 0; i < CYGNUS_NUM_IOMUX; i++) {
+		if (mux->offset != mux_log[i].mux.offset ||
+		    mux->shift != mux_log[i].mux.shift)
+			continue;
+
+		/* match found if we reach here */
+
+		/* if this is a new configuration, just do it! */
+		if (!mux_log[i].is_configured)
+			break;
+
+		/*
+		 * IOMUX has been configured previously and one is trying to
+		 * configure it to a different function
+		 */
+		if (mux_log[i].mux.alt != mux->alt) {
+			dev_err(pinctrl->dev,
+				"double configuration error detected!\n");
+			dev_err(pinctrl->dev, "func:%s grp:%s\n",
+				func->name, grp->name);
+			return -EINVAL;
+		} else {
+			/*
+			 * One tries to configure it to the same function.
+			 * Just quit and don't bother
+			 */
+			return 0;
+		}
+	}
+
+	mux_log[i].mux.alt = mux->alt;
+	mux_log[i].is_configured = true;
+
+	spin_lock_irqsave(&pinctrl->lock, flags);
+
+	val = readl(pinctrl->base0 + grp->mux.offset);
+	val &= ~(mask << grp->mux.shift);
+	val |= grp->mux.alt << grp->mux.shift;
+	writel(val, pinctrl->base0 + grp->mux.offset);
+
+	spin_unlock_irqrestore(&pinctrl->lock, flags);
+
+	return 0;
+}
+
+static int cygnus_pinmux_set_mux(struct pinctrl_dev *pctrl_dev,
+				 unsigned func_select, unsigned grp_select)
+{
+	struct cygnus_pinctrl *pinctrl = pinctrl_dev_get_drvdata(pctrl_dev);
+	const struct cygnus_pin_function *func =
+		&pinctrl->functions[func_select];
+	const struct cygnus_pin_group *grp = &pinctrl->groups[grp_select];
+
+	dev_dbg(pctrl_dev->dev, "func:%u name:%s grp:%u name:%s\n",
+		func_select, func->name, grp_select, grp->name);
+
+	dev_dbg(pctrl_dev->dev, "offset:0x%08x shift:%u alt:%u\n",
+		grp->mux.offset, grp->mux.shift, grp->mux.alt);
+
+	return cygnus_pinmux_set(pinctrl, func, grp, pinctrl->mux_log);
+}
+
+static int cygnus_gpio_request_enable(struct pinctrl_dev *pctrl_dev,
+				      struct pinctrl_gpio_range *range,
+				      unsigned pin)
+{
+	struct cygnus_pinctrl *pinctrl = pinctrl_dev_get_drvdata(pctrl_dev);
+	struct cygnus_gpio_mux *mux = pctrl_dev->desc->pins[pin].drv_data;
+	u32 val;
+	unsigned long flags;
+
+	/* not all pins support GPIO pinmux override */
+	if (!mux->is_supported)
+		return -ENOTSUPP;
+
+	spin_lock_irqsave(&pinctrl->lock, flags);
+
+	val = readl(pinctrl->base1 + mux->offset);
+	val |= 0x3 << mux->shift;
+	writel(val, pinctrl->base1 + mux->offset);
+
+	spin_unlock_irqrestore(&pinctrl->lock, flags);
+
+	dev_dbg(pctrl_dev->dev,
+		"gpio request enable pin=%u offset=0x%x shift=%u\n",
+		pin, mux->offset, mux->shift);
+
+	return 0;
+}
+
+static void cygnus_gpio_disable_free(struct pinctrl_dev *pctrl_dev,
+				     struct pinctrl_gpio_range *range,
+				     unsigned pin)
+{
+	struct cygnus_pinctrl *pinctrl = pinctrl_dev_get_drvdata(pctrl_dev);
+	struct cygnus_gpio_mux *mux = pctrl_dev->desc->pins[pin].drv_data;
+	u32 val;
+	unsigned long flags;
+
+	if (!mux->is_supported)
+		return;
+
+	spin_lock_irqsave(&pinctrl->lock, flags);
+
+	val = readl(pinctrl->base1 + mux->offset);
+	val &= ~(0x3 << mux->shift);
+	writel(val, pinctrl->base1 + mux->offset);
+
+	spin_unlock_irqrestore(&pinctrl->lock, flags);
+
+	dev_err(pctrl_dev->dev,
+		"gpio disable free pin=%u offset=0x%x shift=%u\n",
+		pin, mux->offset, mux->shift);
+}
+
+static struct pinmux_ops cygnus_pinmux_ops = {
+	.get_functions_count = cygnus_get_functions_count,
+	.get_function_name = cygnus_get_function_name,
+	.get_function_groups = cygnus_get_function_groups,
+	.set_mux = cygnus_pinmux_set_mux,
+	.gpio_request_enable = cygnus_gpio_request_enable,
+	.gpio_disable_free = cygnus_gpio_disable_free,
+};
+
+static struct pinctrl_desc cygnus_pinctrl_desc = {
+	.name = "cygnus-pinmux",
+	.pctlops = &cygnus_pinctrl_ops,
+	.pmxops = &cygnus_pinmux_ops,
+};
+
+static int cygnus_mux_log_init(struct cygnus_pinctrl *pinctrl)
+{
+	struct cygnus_mux_log *log;
+	unsigned int i, j;
+
+	pinctrl->mux_log = devm_kcalloc(pinctrl->dev, CYGNUS_NUM_IOMUX,
+					sizeof(struct cygnus_mux_log),
+					GFP_KERNEL);
+	if (!pinctrl->mux_log)
+		return -ENOMEM;
+
+	log = pinctrl->mux_log;
+	for (i = 0; i < CYGNUS_NUM_IOMUX_REGS; i++) {
+		for (j = 0; j < CYGNUS_NUM_MUX_PER_REG; j++) {
+			log = &pinctrl->mux_log[i * CYGNUS_NUM_MUX_PER_REG
+				+ j];
+			log->mux.offset = i * 4;
+			log->mux.shift = j * 4;
+			log->mux.alt = 0;
+			log->is_configured = false;
+		}
+	}
+
+	return 0;
+}
+
+static int cygnus_pinmux_probe(struct platform_device *pdev)
+{
+	struct cygnus_pinctrl *pinctrl;
+	struct resource *res;
+	int i, ret;
+	struct pinctrl_pin_desc *pins;
+	unsigned num_pins = ARRAY_SIZE(cygnus_pins);
+
+	pinctrl = devm_kzalloc(&pdev->dev, sizeof(*pinctrl), GFP_KERNEL);
+	if (!pinctrl)
+		return -ENOMEM;
+
+	pinctrl->dev = &pdev->dev;
+	platform_set_drvdata(pdev, pinctrl);
+	spin_lock_init(&pinctrl->lock);
+
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	pinctrl->base0 = devm_ioremap_resource(&pdev->dev, res);
+	if (IS_ERR(pinctrl->base0)) {
+		dev_err(&pdev->dev, "unable to map I/O space\n");
+		return PTR_ERR(pinctrl->base0);
+	}
+
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
+	pinctrl->base1 = devm_ioremap_resource(&pdev->dev, res);
+	if (IS_ERR(pinctrl->base1)) {
+		dev_err(&pdev->dev, "unable to map I/O space\n");
+		return PTR_ERR(pinctrl->base1);
+	}
+
+	ret = cygnus_mux_log_init(pinctrl);
+	if (ret) {
+		dev_err(&pdev->dev, "unable to initialize IOMUX log\n");
+		return ret;
+	}
+
+	pins = devm_kcalloc(&pdev->dev, num_pins, sizeof(*pins), GFP_KERNEL);
+	if (!pins)
+		return -ENOMEM;
+
+	for (i = 0; i < num_pins; i++) {
+		pins[i].number = cygnus_pins[i].pin;
+		pins[i].name = cygnus_pins[i].name;
+		pins[i].drv_data = &cygnus_pins[i].gpio_mux;
+	}
+
+	pinctrl->groups = cygnus_pin_groups;
+	pinctrl->num_groups = ARRAY_SIZE(cygnus_pin_groups);
+	pinctrl->functions = cygnus_pin_functions;
+	pinctrl->num_functions = ARRAY_SIZE(cygnus_pin_functions);
+	cygnus_pinctrl_desc.pins = pins;
+	cygnus_pinctrl_desc.npins = num_pins;
+
+	pinctrl->pctl = pinctrl_register(&cygnus_pinctrl_desc, &pdev->dev,
+			pinctrl);
+	if (!pinctrl->pctl) {
+		dev_err(&pdev->dev, "unable to register Cygnus IOMUX pinctrl\n");
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static struct of_device_id cygnus_pinmux_of_match[] = {
+	{ .compatible = "brcm,cygnus-pinmux" },
+	{ }
+};
+
+static struct platform_driver cygnus_pinmux_driver = {
+	.driver = {
+		.name = "cygnus-pinmux",
+		.of_match_table = cygnus_pinmux_of_match,
+	},
+	.probe = cygnus_pinmux_probe,
+};
+
+static int __init cygnus_pinmux_init(void)
+{
+	return platform_driver_register(&cygnus_pinmux_driver);
+}
+arch_initcall(cygnus_pinmux_init);
+
+MODULE_AUTHOR("Ray Jui <rjui@broadcom.com>");
+MODULE_DESCRIPTION("Broadcom Cygnus IOMUX driver");
+MODULE_LICENSE("GPL v2");