[v6,08/12] gpio: Add GPIO driver for the RK805 PMIC

Message ID	1496907001-27107-1-git-send-email-chenjh@rock-chips.com
State	New
Headers	show Return-Path: <linux-gpio-owner@vger.kernel.org> From: Jianhong Chen <chenjh@rock-chips.com> To: gnurou@gmail.com, linus.walleij@linaro.org, dmitry.torokhov@gmail.com Cc: linux-rockchip@lists.infradead.org, linux-kernel@vger.kernel.org, huangtao@rock-chips.com, tony.xie@rock-chips.com, zhangqing@rock-chips.com, devicetree@vger.kernel.org, w.egorov@phytec.de, lgirdwood@gmail.com, broonie@kernel.org, robh+dt@kernel.org, mark.rutland@arm.com, linux-gpio@vger.kernel.org, linux-input@vger.kernel.org, chenjh <chenjh@rock-chips.com> Subject: [PATCH v6 08/12] gpio: Add GPIO driver for the RK805 PMIC Date: Thu, 8 Jun 2017 15:30:01 +0800 Message-Id: <1496907001-27107-1-git-send-email-chenjh@rock-chips.com> In-Reply-To: <1496905959-29202-1-git-send-email-chenjh@rock-chips.com> References: <1496905959-29202-1-git-send-email-chenjh@rock-chips.com> Sender: linux-gpio-owner@vger.kernel.org Precedence: bulk

diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig index 0504307..c8cca89 100644 --- a/drivers/gpio/Kconfig +++ b/drivers/gpio/Kconfig @@ -974,6 +974,12 @@ config GPIO_RC5T583 This driver provides the support for driving/reading the gpio pins of RC5T583 device through standard gpio library. +config GPIO_RK805 + bool "Rockchip RK805 GPIO" + depends on MFD_RK808 + help + Select this option to enable GPIO driver for the RK805 PMIC. + config GPIO_STMPE bool "STMPE GPIOs" depends on MFD_STMPE diff --git a/drivers/gpio/Makefile b/drivers/gpio/Makefile index becb96c..55ba941 100644 --- a/drivers/gpio/Makefile +++ b/drivers/gpio/Makefile @@ -99,6 +99,7 @@ obj-$(CONFIG_GPIO_PXA) += gpio-pxa.o obj-$(CONFIG_GPIO_RC5T583) += gpio-rc5t583.o obj-$(CONFIG_GPIO_RDC321X) += gpio-rdc321x.o obj-$(CONFIG_GPIO_RCAR) += gpio-rcar.o +obj-$(CONFIG_GPIO_RK805) += gpio-rk805.o obj-$(CONFIG_ARCH_SA1100) += gpio-sa1100.o obj-$(CONFIG_GPIO_SCH) += gpio-sch.o obj-$(CONFIG_GPIO_SCH311X) += gpio-sch311x.o diff --git a/drivers/gpio/gpio-rk805.c b/drivers/gpio/gpio-rk805.c new file mode 100644 index 0000000..bc17c92 --- /dev/null +++ b/drivers/gpio/gpio-rk805.c @@ -0,0 +1,234 @@ +/* + * GPIO driver for Rockchip RK805 PMIC + * + * Copyright (c) 2017, Fuzhou Rockchip Electronics Co., Ltd + * + * Author: Chen Jianhong <chenjh@rock-chips.com> + * + * 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; either version 2 of the License, or (at your + * option) any later version. + * + * Based on the TPS65218 driver + */ + +#include <linux/i2c.h> +#include <linux/gpio.h> +#include <linux/mfd/rk808.h> +#include <linux/module.h> +#include <linux/platform_device.h> +#include <linux/regmap.h> + +/* rk805 */ +#define RK805_OUT_REG 0x52 +#define RK805_OUT1_VAL_MSK BIT(0) +#define RK805_OUT2_VAL_MSK BIT(1) + +#define OUTPUT_MODE BIT(0) +#define INPUT_MODE BIT(1) + +/* + * @mode: supported modes for this gpio, i.e. OUTPUT_MODE, OUTPUT_MODE... + * @reg: gpio status setting register + * @func_mask: functions select mask value + * @dir_mask: input or output mask value + * @val_mask: gpio set value + */ +struct gpio_pin { + u8 mode; + u8 reg; + u8 func_mask; + u8 dir_msk; + u8 val_msk; +}; + +struct rk805_gpio { + struct device *dev; + struct gpio_chip chip; + struct gpio_pin *pins; + struct rk808 *rk808; +}; + +static int rk805_gpio_direction_input(struct gpio_chip *chip, + unsigned offset) +{ + int ret; + struct rk805_gpio *gpio = gpiochip_get_data(chip); + + if (!(gpio->pins[offset].mode & INPUT_MODE)) { + dev_err(gpio->dev, "gpio%d not support input mode\n", offset); + return -EINVAL; + } + + if (gpio->pins[offset].dir_msk) { + ret = regmap_update_bits(gpio->rk808->regmap, + gpio->pins[offset].reg, + gpio->pins[offset].dir_msk, 0); + if (ret) { + dev_err(gpio->dev, "set gpio%d input failed\n", offset); + return ret; + } + } + + return 0; +} + +static int rk805_gpio_direction_output(struct gpio_chip *chip, + unsigned offset, int value) +{ + int ret; + struct rk805_gpio *gpio = gpiochip_get_data(chip); + + if (!(gpio->pins[offset].mode & OUTPUT_MODE)) { + dev_err(gpio->dev, "gpio%d not support output mode\n", offset); + return -EINVAL; + } + + if (gpio->pins[offset].dir_msk) { + ret = regmap_update_bits(gpio->rk808->regmap, + gpio->pins[offset].reg, + gpio->pins[offset].dir_msk, + gpio->pins[offset].dir_msk); + if (ret) { + dev_err(gpio->dev, "set gpio%d out failed\n", offset); + return ret; + } + } + + ret = regmap_update_bits(gpio->rk808->regmap, + gpio->pins[offset].reg, + gpio->pins[offset].val_msk, + value ? gpio->pins[offset].val_msk : 0); + if (ret) { + dev_err(gpio->dev, "set gpio%d value failed\n", offset); + return ret; + } + + return ret; +} + +static int rk805_gpio_get(struct gpio_chip *chip, unsigned offset) +{ + int ret, val; + struct rk805_gpio *gpio = gpiochip_get_data(chip); + + ret = regmap_read(gpio->rk808->regmap, gpio->pins[offset].reg, &val); + if (ret) { + dev_err(gpio->dev, "gpio%d not support output mode\n", offset); + return ret; + } + + return (val & gpio->pins[offset].val_msk) ? 1 : 0; +} + +static void rk805_gpio_set(struct gpio_chip *chip, unsigned offset, + int value) +{ + struct rk805_gpio *gpio = gpiochip_get_data(chip); + + if (!(gpio->pins[offset].mode & OUTPUT_MODE)) { + dev_err(gpio->dev, "gpio%d not support output mode\n", offset); + return; + } + + regmap_update_bits(gpio->rk808->regmap, + gpio->pins[offset].reg, + gpio->pins[offset].val_msk, + value ? gpio->pins[offset].val_msk : 0); +} + +static int rk805_gpio_request(struct gpio_chip *chip, unsigned offset) +{ + int ret; + struct rk805_gpio *gpio = gpiochip_get_data(chip); + + /* switch to gpio mode */ + if (gpio->pins[offset].func_mask) { + ret = regmap_update_bits(gpio->rk808->regmap, + gpio->pins[offset].reg, + gpio->pins[offset].func_mask, + gpio->pins[offset].func_mask); + if (ret) { + dev_err(gpio->dev, "set gpio%d func failed\n", offset); + return ret; + } + } + + return 0; +} + +static const struct gpio_chip rk805_chip = { + .label = "rk805-gpio", + .owner = THIS_MODULE, + .direction_input = rk805_gpio_direction_input, + .direction_output = rk805_gpio_direction_output, + .get = rk805_gpio_get, + .set = rk805_gpio_set, + .request = rk805_gpio_request, + .base = -1, + .ngpio = 2, + .can_sleep = true, +}; + +static struct gpio_pin rk805_gpio_pins[] = { + { + .mode = OUTPUT_MODE, + .reg = RK805_OUT_REG, + .val_msk = RK805_OUT1_VAL_MSK, + }, + { + .mode = OUTPUT_MODE, + .reg = RK805_OUT_REG, + .val_msk = RK805_OUT2_VAL_MSK, + }, +}; + +static int rk805_gpio_probe(struct platform_device *pdev) +{ + struct rk808 *rk808 = dev_get_drvdata(pdev->dev.parent); + struct i2c_client *client = rk808->i2c; + struct rk805_gpio *gpio; + int ret; + + gpio = devm_kzalloc(&pdev->dev, sizeof(*gpio), GFP_KERNEL); + if (!gpio) + return -ENOMEM; + + switch (rk808->variant) { + case RK805_ID: + gpio->chip = rk805_chip; + gpio->pins = rk805_gpio_pins; + break; + default: + dev_err(&pdev->dev, "unsupported RK8XX ID %lu\n", + rk808->variant); + return -EINVAL; + } + + gpio->chip.parent = &client->dev; + gpio->rk808 = rk808; + gpio->dev = &pdev->dev; + + ret = devm_gpiochip_add_data(&pdev->dev, &gpio->chip, gpio); + if (ret) { + dev_err(&pdev->dev, "Could not register gpiochip, %d\n", ret); + return ret; + } + + platform_set_drvdata(pdev, gpio); + + return 0; +} + +static struct platform_driver rk805_gpio_driver = { + .probe = rk805_gpio_probe, + .driver = { + .name = "rk805-gpio", + }, +}; +module_platform_driver(rk805_gpio_driver); + +MODULE_AUTHOR("Chen Jianghong <chenjh@rock-chips.com>"); +MODULE_DESCRIPTION("Rockchip RK805 PMIC GPIO driver"); +MODULE_LICENSE("GPL v2");

[v6,08/12] gpio: Add GPIO driver for the RK805 PMIC

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