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Tue, 26 Oct 2021 17:58:21 +0000 From: Joey Gouly To: CC: Linus Walleij , Hector Martin , Marc Zyngier , Alyssa Rosenzweig , Sven Peter , , Rob Herring , Mark Kettenis , , Joey Gouly Subject: [PATCH v5 1/5] gpio: Allow per-parent interrupt data Date: Tue, 26 Oct 2021 18:58:11 +0100 Message-ID: <20211026175815.52703-2-joey.gouly@arm.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20211026175815.52703-1-joey.gouly@arm.com> References: <20211026175815.52703-1-joey.gouly@arm.com> MIME-Version: 1.0 X-EOPAttributedMessage: 1 X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: 04a27af4-4b8b-4dd7-aef7-08d998aa3770 X-MS-TrafficTypeDiagnostic: DB9PR08MB7007:|AM9PR08MB7291: X-Microsoft-Antispam-PRVS: x-checkrecipientrouted: true NoDisclaimer: true X-MS-Oob-TLC-OOBClassifiers: OLM:3383;OLM:3383; X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam-Untrusted: BCL:0; X-Microsoft-Antispam-Message-Info-Original: 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 X-Forefront-Antispam-Report-Untrusted: CIP:40.67.248.234;CTRY:IE;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:nebula.arm.com;PTR:InfoDomainNonexistent;CAT:NONE;SFS:(4636009)(36840700001)(46966006)(508600001)(426003)(5660300002)(316002)(6916009)(8936002)(82310400003)(83380400001)(8676002)(6666004)(186003)(7696005)(336012)(36756003)(47076005)(26005)(1076003)(70206006)(54906003)(2906002)(86362001)(81166007)(356005)(70586007)(36860700001)(4326008)(44832011)(2616005)(36900700001);DIR:OUT;SFP:1101; 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X-OriginatorOrg: arm.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 26 Oct 2021 17:58:29.0200 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 04a27af4-4b8b-4dd7-aef7-08d998aa3770 X-MS-Exchange-CrossTenant-Id: f34e5979-57d9-4aaa-ad4d-b122a662184d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=f34e5979-57d9-4aaa-ad4d-b122a662184d;Ip=[63.35.35.123];Helo=[64aa7808-outbound-1.mta.getcheckrecipient.com] X-MS-Exchange-CrossTenant-AuthSource: VE1EUR03FT028.eop-EUR03.prod.protection.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: AM9PR08MB7291 Precedence: bulk List-ID: X-Mailing-List: linux-gpio@vger.kernel.org From: Marc Zyngier The core gpiolib code is able to deal with multiple interrupt parents for a single gpio irqchip. It however only allows a single piece of data to be conveyed to all flow handlers (either the gpio_chip or some other, driver-specific data). This means that drivers have to go through some interesting dance to find the correct context, something that isn't great in interrupt context (see aebdc8abc9db86e2bd33070fc2f961012fff74b4 for a prime example). Instead, offer an optional way for a pinctrl/gpio driver to provide an array of pointers which gets used to provide the correct context to the flow handler. Signed-off-by: Marc Zyngier Signed-off-by: Joey Gouly Reviewed-by: Linus Walleij --- drivers/gpio/gpiolib.c | 9 +++++++-- include/linux/gpio/driver.h | 19 +++++++++++++++++-- 2 files changed, 24 insertions(+), 4 deletions(-) diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c index d1b9b721218f..abfbf546d159 100644 --- a/drivers/gpio/gpiolib.c +++ b/drivers/gpio/gpiolib.c @@ -1534,9 +1534,14 @@ static int gpiochip_add_irqchip(struct gpio_chip *gc, } if (gc->irq.parent_handler) { - void *data = gc->irq.parent_handler_data ?: gc; - for (i = 0; i < gc->irq.num_parents; i++) { + void *data; + + if (gc->irq.per_parent_data) + data = gc->irq.parent_handler_data_array[i]; + else + data = gc->irq.parent_handler_data ?: gc; + /* * The parent IRQ chip is already using the chip_data * for this IRQ chip, so our callbacks simply use the diff --git a/include/linux/gpio/driver.h b/include/linux/gpio/driver.h index a0f9901dcae6..a673a359e20b 100644 --- a/include/linux/gpio/driver.h +++ b/include/linux/gpio/driver.h @@ -168,11 +168,18 @@ struct gpio_irq_chip { /** * @parent_handler_data: + * @parent_handler_data_array: * * Data associated, and passed to, the handler for the parent - * interrupt. + * interrupt. Can either be a single pointer if @per_parent_data + * is false, or an array of @num_parents pointers otherwise. If + * @per_parent_data is true, @parent_handler_data_array cannot be + * NULL. */ - void *parent_handler_data; + union { + void *parent_handler_data; + void **parent_handler_data_array; + }; /** * @num_parents: @@ -203,6 +210,14 @@ struct gpio_irq_chip { */ bool threaded; + /** + * @per_parent_data: + * + * True if parent_handler_data_array describes a @num_parents + * sized array to be used as parent data. + */ + bool per_parent_data; + /** * @init_hw: optional routine to initialize hardware before * an IRQ chip will be added. This is quite useful when From patchwork Tue Oct 26 17:58:12 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Joey Gouly X-Patchwork-Id: 1546554 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: bilbo.ozlabs.org; dkim=pass (1024-bit key; unprotected) header.d=armh.onmicrosoft.com header.i=@armh.onmicrosoft.com header.a=rsa-sha256 header.s=selector2-armh-onmicrosoft-com header.b=IpAMOQw6; dkim=pass (1024-bit key) header.d=armh.onmicrosoft.com header.i=@armh.onmicrosoft.com header.a=rsa-sha256 header.s=selector2-armh-onmicrosoft-com header.b=IpAMOQw6; dkim-atps=neutral Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org (client-ip=23.128.96.18; helo=vger.kernel.org; envelope-from=linux-gpio-owner@vger.kernel.org; receiver=) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by bilbo.ozlabs.org (Postfix) with ESMTP id 4Hf01j2FsRz9sRR for ; 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X-OriginatorOrg: arm.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 26 Oct 2021 17:58:31.6917 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 7ef64f2e-64d2-459a-b822-08d998aa3909 X-MS-Exchange-CrossTenant-Id: f34e5979-57d9-4aaa-ad4d-b122a662184d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=f34e5979-57d9-4aaa-ad4d-b122a662184d;Ip=[63.35.35.123];Helo=[64aa7808-outbound-1.mta.getcheckrecipient.com] X-MS-Exchange-CrossTenant-AuthSource: VE1EUR03FT017.eop-EUR03.prod.protection.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: AM0PR08MB3459 Precedence: bulk List-ID: X-Mailing-List: linux-gpio@vger.kernel.org The GPIO/pinctrl hardware can act as an interrupt-controller, so add the #interrupt-cells property to the binding. Signed-off-by: Joey Gouly Reviewed-by: Sven Peter Acked-by: Rob Herring --- Documentation/devicetree/bindings/pinctrl/apple,pinctrl.yaml | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/Documentation/devicetree/bindings/pinctrl/apple,pinctrl.yaml b/Documentation/devicetree/bindings/pinctrl/apple,pinctrl.yaml index d50571affd1f..0b3eb068fb12 100644 --- a/Documentation/devicetree/bindings/pinctrl/apple,pinctrl.yaml +++ b/Documentation/devicetree/bindings/pinctrl/apple,pinctrl.yaml @@ -43,6 +43,9 @@ properties: interrupt-controller: true + '#interrupt-cells': + const: 2 + patternProperties: '-pins$': type: object @@ -88,6 +91,7 @@ examples: gpio-ranges = <&pinctrl 0 0 212>; interrupt-controller; + #interrupt-cells = <2>; interrupt-parent = <&aic>; interrupts = , , From patchwork Tue Oct 26 17:58:13 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Joey Gouly X-Patchwork-Id: 1546551 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: bilbo.ozlabs.org; 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X-OriginatorOrg: arm.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 26 Oct 2021 17:58:41.2617 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: cc8129ef-bbed-491b-29d9-08d998aa3eb3 X-MS-Exchange-CrossTenant-Id: f34e5979-57d9-4aaa-ad4d-b122a662184d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=f34e5979-57d9-4aaa-ad4d-b122a662184d;Ip=[63.35.35.123];Helo=[64aa7808-outbound-1.mta.getcheckrecipient.com] X-MS-Exchange-CrossTenant-AuthSource: AM5EUR03FT039.eop-EUR03.prod.protection.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: PA4PR08MB5983 Precedence: bulk List-ID: X-Mailing-List: linux-gpio@vger.kernel.org This property is used to describe the total number of pins on this particular pinctrl hardware block. Signed-off-by: Joey Gouly Reviewed-by: Linus Walleij Acked-by: Rob Herring --- .../devicetree/bindings/pinctrl/apple,pinctrl.yaml | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/Documentation/devicetree/bindings/pinctrl/apple,pinctrl.yaml b/Documentation/devicetree/bindings/pinctrl/apple,pinctrl.yaml index 0b3eb068fb12..07b00de79755 100644 --- a/Documentation/devicetree/bindings/pinctrl/apple,pinctrl.yaml +++ b/Documentation/devicetree/bindings/pinctrl/apple,pinctrl.yaml @@ -34,6 +34,10 @@ properties: gpio-ranges: maxItems: 1 + apple,npins: + $ref: /schemas/types.yaml#/definitions/uint32 + description: The number of pins in this GPIO controller. + interrupts: description: One interrupt for each of the (up to 7) interrupt groups supported by the controller sorted by interrupt group @@ -69,6 +73,7 @@ required: - gpio-controller - '#gpio-cells' - gpio-ranges + - apple,npins additionalProperties: false @@ -89,6 +94,7 @@ examples: gpio-controller; #gpio-cells = <2>; gpio-ranges = <&pinctrl 0 0 212>; 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X-OriginatorOrg: arm.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 26 Oct 2021 17:58:34.2752 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: e1550ad5-c2c7-4b50-e8a7-08d998aa3a92 X-MS-Exchange-CrossTenant-Id: f34e5979-57d9-4aaa-ad4d-b122a662184d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=f34e5979-57d9-4aaa-ad4d-b122a662184d;Ip=[63.35.35.123];Helo=[64aa7808-outbound-1.mta.getcheckrecipient.com] X-MS-Exchange-CrossTenant-AuthSource: VE1EUR03FT039.eop-EUR03.prod.protection.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: PA4PR08MB6269 Precedence: bulk List-ID: X-Mailing-List: linux-gpio@vger.kernel.org This driver adds support for the pinctrl / GPIO hardware found on some Apple SoCs. Co-developed-by: Stan Skowronek Signed-off-by: Stan Skowronek Signed-off-by: Joey Gouly Acked-by: Hector Martin Reviewed-by: Marc Zyngier --- drivers/pinctrl/Kconfig | 16 + drivers/pinctrl/Makefile | 1 + drivers/pinctrl/pinctrl-apple-gpio.c | 534 +++++++++++++++++++++++++++ 3 files changed, 551 insertions(+) create mode 100644 drivers/pinctrl/pinctrl-apple-gpio.c diff --git a/drivers/pinctrl/Kconfig b/drivers/pinctrl/Kconfig index 31921108e456..6a961d5f8726 100644 --- a/drivers/pinctrl/Kconfig +++ b/drivers/pinctrl/Kconfig @@ -31,6 +31,22 @@ config DEBUG_PINCTRL help Say Y here to add some extra checks and diagnostics to PINCTRL calls. +config PINCTRL_APPLE_GPIO + tristate "Apple SoC GPIO pin controller driver" + depends on ARCH_APPLE + select PINMUX + select GPIOLIB + select GPIOLIB_IRQCHIP + select GENERIC_PINCTRL_GROUPS + select GENERIC_PINMUX_FUNCTIONS + select OF_GPIO + help + This is the driver for the GPIO controller found on Apple ARM SoCs, + including M1. + + This driver can also be built as a module. If so, the module + will be called pinctrl-apple-gpio. + config PINCTRL_ARTPEC6 bool "Axis ARTPEC-6 pin controller driver" depends on MACH_ARTPEC6 diff --git a/drivers/pinctrl/Makefile b/drivers/pinctrl/Makefile index 200073bcc2c1..5e63de2ffcf4 100644 --- a/drivers/pinctrl/Makefile +++ b/drivers/pinctrl/Makefile @@ -8,6 +8,7 @@ obj-$(CONFIG_PINMUX) += pinmux.o obj-$(CONFIG_PINCONF) += pinconf.o obj-$(CONFIG_OF) += devicetree.o obj-$(CONFIG_GENERIC_PINCONF) += pinconf-generic.o +obj-$(CONFIG_PINCTRL_APPLE_GPIO) += pinctrl-apple-gpio.o obj-$(CONFIG_PINCTRL_ARTPEC6) += pinctrl-artpec6.o obj-$(CONFIG_PINCTRL_AS3722) += pinctrl-as3722.o obj-$(CONFIG_PINCTRL_AXP209) += pinctrl-axp209.o diff --git a/drivers/pinctrl/pinctrl-apple-gpio.c b/drivers/pinctrl/pinctrl-apple-gpio.c new file mode 100644 index 000000000000..0cc346bfc4c3 --- /dev/null +++ b/drivers/pinctrl/pinctrl-apple-gpio.c @@ -0,0 +1,534 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Apple SoC pinctrl+GPIO+external IRQ driver + * + * Copyright (C) The Asahi Linux Contributors + * Copyright (C) 2020 Corellium LLC + * + * Based on: pinctrl-pistachio.c + * Copyright (C) 2014 Imagination Technologies Ltd. + * Copyright (C) 2014 Google, Inc. + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include "pinctrl-utils.h" +#include "core.h" +#include "pinmux.h" + +struct apple_gpio_pinctrl { + struct device *dev; + struct pinctrl_dev *pctldev; + + void __iomem *base; + struct regmap *map; + + struct pinctrl_desc pinctrl_desc; + struct gpio_chip gpio_chip; + struct irq_chip irq_chip; + u8 irqgrps[0]; +}; + +#define REG_GPIO(x) (4 * (x)) +#define REG_GPIOx_DATA BIT(0) +#define REG_GPIOx_MODE GENMASK(3, 1) +#define REG_GPIOx_OUT 1 +#define REG_GPIOx_IN_IRQ_HI 2 +#define REG_GPIOx_IN_IRQ_LO 3 +#define REG_GPIOx_IN_IRQ_UP 4 +#define REG_GPIOx_IN_IRQ_DN 5 +#define REG_GPIOx_IN_IRQ_ANY 6 +#define REG_GPIOx_IN_IRQ_OFF 7 +#define REG_GPIOx_PERIPH GENMASK(6, 5) +#define REG_GPIOx_PULL GENMASK(8, 7) +#define REG_GPIOx_PULL_OFF 0 +#define REG_GPIOx_PULL_DOWN 1 +#define REG_GPIOx_PULL_UP_STRONG 2 +#define REG_GPIOx_PULL_UP 3 +#define REG_GPIOx_INPUT_ENABLE BIT(9) +#define REG_GPIOx_DRIVE_STRENGTH0 GENMASK(11, 10) +#define REG_GPIOx_SCHMITT BIT(15) +#define REG_GPIOx_GRP GENMASK(18, 16) +#define REG_GPIOx_LOCK BIT(21) +#define REG_GPIOx_DRIVE_STRENGTH1 GENMASK(23, 22) +#define REG_IRQ(g, x) (0x800 + 0x40 * (g) + 4 * ((x) >> 5)) + +struct regmap_config regmap_config = { + .reg_bits = 32, + .val_bits = 32, + .reg_stride = 4, + .cache_type = REGCACHE_FLAT, + .max_register = 512 * sizeof(u32), + .num_reg_defaults_raw = 512, + .use_relaxed_mmio = true +}; + +// No locking needed to mask/unmask IRQs as the interrupt mode is per pin-register. +static void apple_gpio_set_reg(struct apple_gpio_pinctrl *pctl, + unsigned int pin, u32 mask, u32 value) +{ + regmap_update_bits(pctl->map, REG_GPIO(pin), mask, value); +} + +static uint32_t apple_gpio_get_reg(struct apple_gpio_pinctrl *pctl, + unsigned int pin) +{ + unsigned int val = 0; + + regmap_read(pctl->map, REG_GPIO(pin), &val); + return val; +} + +/* Pin controller functions */ + +static int apple_gpio_dt_node_to_map(struct pinctrl_dev *pctldev, + struct device_node *node, + struct pinctrl_map **map, + unsigned *num_maps) +{ + unsigned reserved_maps; + struct apple_gpio_pinctrl *pctl; + u32 pinfunc, pin, func; + int num_pins, i, ret; + const char *group_name; + const char *function_name; + + *map = NULL; + *num_maps = 0; + reserved_maps = 0; + + pctl = pinctrl_dev_get_drvdata(pctldev); + + ret = of_property_count_u32_elems(node, "pinmux"); + if (ret <= 0) { + dev_err(pctl->dev, + "missing or empty pinmux property in node %pOFn.\n", + node); + return ret; + } + + num_pins = ret; + + ret = pinctrl_utils_reserve_map(pctldev, map, &reserved_maps, num_maps, + num_pins); + if (ret) + return ret; + + for (i = 0; i < num_pins; i++) { + ret = of_property_read_u32_index(node, "pinmux", i, &pinfunc); + if (ret) + goto free_map; + + pin = APPLE_PIN(pinfunc); + func = APPLE_FUNC(pinfunc); + + if (func >= pinmux_generic_get_function_count(pctldev)) { + ret = -EINVAL; + goto free_map; + } + + group_name = pinctrl_generic_get_group_name(pctldev, pin); + function_name = + pinmux_generic_get_function_name(pctl->pctldev, func); + ret = pinctrl_utils_add_map_mux(pctl->pctldev, map, + &reserved_maps, num_maps, + group_name, function_name); + if (ret) + goto free_map; + } + +free_map: + if (ret < 0) + pinctrl_utils_free_map(pctldev, *map, *num_maps); + + return ret; +} + +static const struct pinctrl_ops apple_gpio_pinctrl_ops = { + .get_groups_count = pinctrl_generic_get_group_count, + .get_group_name = pinctrl_generic_get_group_name, + .get_group_pins = pinctrl_generic_get_group_pins, + .dt_node_to_map = apple_gpio_dt_node_to_map, + .dt_free_map = pinctrl_utils_free_map, +}; + +/* Pin multiplexer functions */ + +static int apple_gpio_pinmux_set(struct pinctrl_dev *pctldev, unsigned func, + unsigned group) +{ + struct apple_gpio_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev); + + apple_gpio_set_reg( + pctl, group, REG_GPIOx_PERIPH | REG_GPIOx_INPUT_ENABLE, + FIELD_PREP(REG_GPIOx_PERIPH, func) | REG_GPIOx_INPUT_ENABLE); + + return 0; +} + +static const struct pinmux_ops apple_gpio_pinmux_ops = { + .get_functions_count = pinmux_generic_get_function_count, + .get_function_name = pinmux_generic_get_function_name, + .get_function_groups = pinmux_generic_get_function_groups, + .set_mux = apple_gpio_pinmux_set, + .strict = true, +}; + +/* GPIO chip functions */ + +static int apple_gpio_get_direction(struct gpio_chip *chip, + unsigned int offset) +{ + struct apple_gpio_pinctrl *pctl = gpiochip_get_data(chip); + unsigned int reg = apple_gpio_get_reg(pctl, offset); + + return (FIELD_GET(REG_GPIOx_MODE, reg) == REG_GPIOx_OUT) ? + GPIO_LINE_DIRECTION_OUT : GPIO_LINE_DIRECTION_IN; +} + +static int apple_gpio_get(struct gpio_chip *chip, unsigned offset) +{ + struct apple_gpio_pinctrl *pctl = gpiochip_get_data(chip); + unsigned int reg = apple_gpio_get_reg(pctl, offset); + + /* + * If this is an input GPIO, read the actual value (not the + * cached regmap value) + */ + if (FIELD_GET(REG_GPIOx_MODE, reg) != REG_GPIOx_OUT) + reg = readl_relaxed(pctl->base + REG_GPIO(offset)); + + return !!(reg & REG_GPIOx_DATA); +} + +static void apple_gpio_set(struct gpio_chip *chip, unsigned int offset, + int value) +{ + struct apple_gpio_pinctrl *pctl = gpiochip_get_data(chip); + + apple_gpio_set_reg(pctl, offset, REG_GPIOx_DATA, + value ? REG_GPIOx_DATA : 0); +} + +static int apple_gpio_direction_input(struct gpio_chip *chip, + unsigned int offset) +{ + struct apple_gpio_pinctrl *pctl = gpiochip_get_data(chip); + + apple_gpio_set_reg(pctl, offset, + REG_GPIOx_PERIPH | REG_GPIOx_MODE | REG_GPIOx_DATA | + REG_GPIOx_INPUT_ENABLE, + FIELD_PREP(REG_GPIOx_MODE, REG_GPIOx_IN_IRQ_OFF) | + REG_GPIOx_INPUT_ENABLE); + return 0; +} + +static int apple_gpio_direction_output(struct gpio_chip *chip, + unsigned int offset, int value) +{ + struct apple_gpio_pinctrl *pctl = gpiochip_get_data(chip); + + apple_gpio_set_reg(pctl, offset, + REG_GPIOx_PERIPH | REG_GPIOx_MODE | REG_GPIOx_DATA, + FIELD_PREP(REG_GPIOx_MODE, REG_GPIOx_OUT) | + (value ? REG_GPIOx_DATA : 0)); + return 0; +} + +/* IRQ chip functions */ + +static void apple_gpio_irq_ack(struct irq_data *data) +{ + struct apple_gpio_pinctrl *pctl = + gpiochip_get_data(irq_data_get_irq_chip_data(data)); + unsigned int irqgrp = + FIELD_GET(REG_GPIOx_GRP, apple_gpio_get_reg(pctl, data->hwirq)); + + writel(BIT(data->hwirq & 31), + pctl->base + REG_IRQ(irqgrp, data->hwirq)); +} + +static int apple_gpio_irq_type(unsigned int type) +{ + switch (type & IRQ_TYPE_SENSE_MASK) { + case IRQ_TYPE_EDGE_RISING: + return REG_GPIOx_IN_IRQ_UP; + case IRQ_TYPE_EDGE_FALLING: + return REG_GPIOx_IN_IRQ_DN; + case IRQ_TYPE_EDGE_BOTH: + return REG_GPIOx_IN_IRQ_ANY; + case IRQ_TYPE_LEVEL_HIGH: + return REG_GPIOx_IN_IRQ_HI; + case IRQ_TYPE_LEVEL_LOW: + return REG_GPIOx_IN_IRQ_LO; + default: + return -EINVAL; + } +} + +static void apple_gpio_irq_mask(struct irq_data *data) +{ + struct apple_gpio_pinctrl *pctl = + gpiochip_get_data(irq_data_get_irq_chip_data(data)); + apple_gpio_set_reg(pctl, data->hwirq, REG_GPIOx_MODE, + FIELD_PREP(REG_GPIOx_MODE, REG_GPIOx_IN_IRQ_OFF)); +} + +static void apple_gpio_irq_unmask(struct irq_data *data) +{ + struct apple_gpio_pinctrl *pctl = + gpiochip_get_data(irq_data_get_irq_chip_data(data)); + int irqtype = apple_gpio_irq_type(irqd_get_trigger_type(data)); + + apple_gpio_set_reg(pctl, data->hwirq, REG_GPIOx_MODE, + FIELD_PREP(REG_GPIOx_MODE, irqtype)); +} + +static unsigned int apple_gpio_irq_startup(struct irq_data *data) +{ + struct gpio_chip *chip = irq_data_get_irq_chip_data(data); + struct apple_gpio_pinctrl *pctl = gpiochip_get_data(chip); + + apple_gpio_set_reg(pctl, data->hwirq, REG_GPIOx_GRP, + FIELD_PREP(REG_GPIOx_GRP, 0)); + + apple_gpio_direction_input(chip, data->hwirq); + apple_gpio_irq_unmask(data); + + return 0; +} + +static int apple_gpio_irq_set_type(struct irq_data *data, + unsigned int type) +{ + struct apple_gpio_pinctrl *pctl = + gpiochip_get_data(irq_data_get_irq_chip_data(data)); + int irqtype = apple_gpio_irq_type(type); + + if (irqtype < 0) + return irqtype; + + apple_gpio_set_reg(pctl, data->hwirq, REG_GPIOx_MODE, + FIELD_PREP(REG_GPIOx_MODE, irqtype)); + + if (type & IRQ_TYPE_LEVEL_MASK) + irq_set_handler_locked(data, handle_level_irq); + else + irq_set_handler_locked(data, handle_edge_irq); + return 0; +} + +static void apple_gpio_irq_handler(struct irq_desc *desc) +{ + struct irq_chip *chip = irq_desc_get_chip(desc); + u8 *grpp = irq_desc_get_handler_data(desc); + struct apple_gpio_pinctrl *pctl; + unsigned int pinh, pinl; + unsigned long pending; + struct gpio_chip *gc; + + pctl = container_of(grpp - *grpp, typeof(*pctl), irqgrps[0]); + gc = &pctl->gpio_chip; + + chained_irq_enter(chip, desc); + for (pinh = 0; pinh < gc->ngpio; pinh += 32) { + pending = readl_relaxed(pctl->base + REG_IRQ(*grpp, pinh)); + for_each_set_bit(pinl, &pending, 32) + generic_handle_domain_irq(gc->irq.domain, pinh + pinl); + } + chained_irq_exit(chip, desc); +} + +static struct irq_chip apple_gpio_irqchip = { + .name = "Apple-GPIO", + .irq_startup = apple_gpio_irq_startup, + .irq_ack = apple_gpio_irq_ack, + .irq_mask = apple_gpio_irq_mask, + .irq_unmask = apple_gpio_irq_unmask, + .irq_set_type = apple_gpio_irq_set_type, +}; + +/* Probe & register */ + +static int apple_gpio_register(struct apple_gpio_pinctrl *pctl) +{ + struct gpio_irq_chip *girq = &pctl->gpio_chip.irq; + void **irq_data = NULL; + int ret; + + if (!of_property_read_bool(pctl->dev->of_node, "gpio-controller")) + return dev_err_probe(pctl->dev, -ENODEV, + "No gpio-controller property\n"); + + pctl->irq_chip = apple_gpio_irqchip; + + pctl->gpio_chip.label = dev_name(pctl->dev); + pctl->gpio_chip.request = gpiochip_generic_request; + pctl->gpio_chip.free = gpiochip_generic_free; + pctl->gpio_chip.get_direction = apple_gpio_get_direction; + pctl->gpio_chip.direction_input = apple_gpio_direction_input; + pctl->gpio_chip.direction_output = apple_gpio_direction_output; + pctl->gpio_chip.get = apple_gpio_get; + pctl->gpio_chip.set = apple_gpio_set; + pctl->gpio_chip.base = -1; + pctl->gpio_chip.ngpio = pctl->pinctrl_desc.npins; + pctl->gpio_chip.parent = pctl->dev; + pctl->gpio_chip.of_node = pctl->dev->of_node; + + if (girq->num_parents) { + int i; + + girq->chip = &pctl->irq_chip; + girq->parent_handler = apple_gpio_irq_handler; + + girq->parents = kmalloc_array(girq->num_parents, + sizeof(*girq->parents), + GFP_KERNEL); + irq_data = kmalloc_array(girq->num_parents, sizeof(*irq_data), + GFP_KERNEL); + if (!girq->parents || !irq_data) { + ret = -ENOMEM; + goto out; + } + + for (i = 0; i < girq->num_parents; i++) { + ret = platform_get_irq(to_platform_device(pctl->dev), + i); + if (ret < 0) + goto out; + + girq->parents[i] = ret; + pctl->irqgrps[i] = i; + irq_data[i] = &pctl->irqgrps[i]; + } + + girq->parent_handler_data_array = irq_data; + girq->per_parent_data = true; + girq->default_type = IRQ_TYPE_NONE; + girq->handler = handle_level_irq; + } + + ret = devm_gpiochip_add_data(pctl->dev, &pctl->gpio_chip, pctl); +out: + kfree(girq->parents); + kfree(irq_data); + + return ret; +} + +static int apple_gpio_pinctrl_probe(struct platform_device *pdev) +{ + struct apple_gpio_pinctrl *pctl; + struct pinctrl_pin_desc *pins; + unsigned int npins; + const char **pin_names; + unsigned int *pin_nums; + static const char* pinmux_functions[] = { + "gpio", "periph1", "periph2", "periph3" + }; + unsigned int i, nirqs = 0; + int res; + + if (of_property_read_bool(pdev->dev.of_node, "interrupt-controller")) { + res = platform_irq_count(pdev); + if (res > 0) + nirqs = res; + } + + pctl = devm_kzalloc(&pdev->dev, struct_size(pctl, irqgrps, nirqs), + GFP_KERNEL); + if (!pctl) + return -ENOMEM; + pctl->dev = &pdev->dev; + pctl->gpio_chip.irq.num_parents = nirqs; + dev_set_drvdata(&pdev->dev, pctl); + + if (of_property_read_u32(pdev->dev.of_node, "apple,npins", &npins)) + return dev_err_probe(&pdev->dev, -EINVAL, + "apple,npins property not found\n"); + + pins = devm_kmalloc_array(&pdev->dev, npins, sizeof(pins[0]), + GFP_KERNEL); + pin_names = devm_kmalloc_array(&pdev->dev, npins, sizeof(pin_names[0]), + GFP_KERNEL); + pin_nums = devm_kmalloc_array(&pdev->dev, npins, sizeof(pin_nums[0]), + GFP_KERNEL); + if (!pins || !pin_names || !pin_nums) + return -ENOMEM; + + pctl->base = devm_platform_ioremap_resource(pdev, 0); + if (IS_ERR(pctl->base)) + return PTR_ERR(pctl->base); + + pctl->map = devm_regmap_init_mmio(&pdev->dev, pctl->base, ®map_config); + if (IS_ERR(pctl->map)) + return dev_err_probe(&pdev->dev, PTR_ERR(pctl->map), + "Failed to create regmap\n"); + + for (i = 0; i < npins; i++) { + pins[i].number = i; + pins[i].name = devm_kasprintf(&pdev->dev, GFP_KERNEL, "PIN%u", i); + pins[i].drv_data = pctl; + pin_names[i] = pins[i].name; + pin_nums[i] = i; + } + + pctl->pinctrl_desc.name = dev_name(pctl->dev); + pctl->pinctrl_desc.pins = pins; + pctl->pinctrl_desc.npins = npins; + pctl->pinctrl_desc.pctlops = &apple_gpio_pinctrl_ops; + pctl->pinctrl_desc.pmxops = &apple_gpio_pinmux_ops; + + pctl->pctldev = devm_pinctrl_register(&pdev->dev, &pctl->pinctrl_desc, pctl); + if (IS_ERR(pctl->pctldev)) + return dev_err_probe(&pdev->dev, PTR_ERR(pctl->pctldev), + "Failed to register pinctrl device.\n"); + + for (i = 0; i < npins; i++) { + res = pinctrl_generic_add_group(pctl->pctldev, pins[i].name, + pin_nums + i, 1, pctl); + if (res < 0) + return dev_err_probe(pctl->dev, res, + "Failed to register group"); + } + + for (i = 0; i < ARRAY_SIZE(pinmux_functions); ++i) { + res = pinmux_generic_add_function(pctl->pctldev, pinmux_functions[i], + pin_names, npins, pctl); + if (res < 0) + return dev_err_probe(pctl->dev, res, + "Failed to register function."); + } + + return apple_gpio_register(pctl); +} + +static const struct of_device_id apple_gpio_pinctrl_of_match[] = { + { .compatible = "apple,pinctrl", }, + { } +}; + +static struct platform_driver apple_gpio_pinctrl_driver = { + .driver = { + .name = "apple-gpio-pinctrl", + .of_match_table = apple_gpio_pinctrl_of_match, + .suppress_bind_attrs = true, + }, + .probe = apple_gpio_pinctrl_probe, +}; +module_platform_driver(apple_gpio_pinctrl_driver); + +MODULE_DESCRIPTION("Apple pinctrl/GPIO driver"); +MODULE_AUTHOR("Stan Skowronek "); +MODULE_AUTHOR("Joey Gouly "); +MODULE_LICENSE("GPL v2"); From patchwork Tue Oct 26 17:58:15 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Joey Gouly X-Patchwork-Id: 1546550 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: bilbo.ozlabs.org; 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Tue, 26 Oct 2021 17:58:23 +0000 Received: from AZ-NEU-EX03.Arm.com (10.251.24.31) by AZ-NEU-EX01.Emea.Arm.com (10.251.26.4) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.2308.14; Tue, 26 Oct 2021 17:58:20 +0000 Received: from e124191.cambridge.arm.com (10.1.197.45) by mail.arm.com (10.251.24.31) with Microsoft SMTP Server id 15.1.2308.14 via Frontend Transport; Tue, 26 Oct 2021 17:58:22 +0000 From: Joey Gouly To: CC: Linus Walleij , Hector Martin , Marc Zyngier , Alyssa Rosenzweig , Sven Peter , , Rob Herring , Mark Kettenis , , Joey Gouly Subject: [PATCH v5 5/5] MAINTAINERS: add pinctrl-apple-gpio to ARM/APPLE MACHINE Date: Tue, 26 Oct 2021 18:58:15 +0100 Message-ID: <20211026175815.52703-6-joey.gouly@arm.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20211026175815.52703-1-joey.gouly@arm.com> References: <20211026175815.52703-1-joey.gouly@arm.com> MIME-Version: 1.0 X-EOPAttributedMessage: 1 X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: 6e764a1e-1a4b-4592-42e2-08d998aa3a14 X-MS-TrafficTypeDiagnostic: PR2PR08MB4714:|AM6PR08MB3016: X-Microsoft-Antispam-PRVS: x-checkrecipientrouted: true NoDisclaimer: true X-MS-Oob-TLC-OOBClassifiers: OLM:3826;OLM:3826; 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X-OriginatorOrg: arm.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 26 Oct 2021 17:58:33.4505 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 6e764a1e-1a4b-4592-42e2-08d998aa3a14 X-MS-Exchange-CrossTenant-Id: f34e5979-57d9-4aaa-ad4d-b122a662184d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=f34e5979-57d9-4aaa-ad4d-b122a662184d;Ip=[63.35.35.123];Helo=[64aa7808-outbound-1.mta.getcheckrecipient.com] X-MS-Exchange-CrossTenant-AuthSource: VE1EUR03FT064.eop-EUR03.prod.protection.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: AM6PR08MB3016 Precedence: bulk List-ID: X-Mailing-List: linux-gpio@vger.kernel.org Add the Apple SoC pinctrl driver to the ARM/APPLE MACHINE entry in MAINTAINERS. Signed-off-by: Joey Gouly Acked-by: Hector Martin --- MAINTAINERS | 1 + 1 file changed, 1 insertion(+) diff --git a/MAINTAINERS b/MAINTAINERS index ca6d6fde85cf..e83e992b8ada 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -1722,6 +1722,7 @@ F: Documentation/devicetree/bindings/interrupt-controller/apple,aic.yaml F: Documentation/devicetree/bindings/pinctrl/apple,pinctrl.yaml F: arch/arm64/boot/dts/apple/ F: drivers/irqchip/irq-apple-aic.c +F: drivers/pinctrl/pinctrl-apple-gpio.c F: include/dt-bindings/interrupt-controller/apple-aic.h F: include/dt-bindings/pinctrl/apple.h