// SPDX-License-Identifier: GPL-2.0 /* * Driver for STMicroelectronics Multi-Function eXpander (STMFX) GPIO expander * * Copyright (C) 2019 STMicroelectronics * Author(s): Amelie Delaunay <[email protected]>. */ #include <linux/gpio/driver.h> #include <linux/interrupt.h> #include <linux/mfd/stmfx.h> #include <linux/module.h> #include <linux/platform_device.h> #include <linux/seq_file.h> #include <linux/string_choices.h> #include <linux/pinctrl/pinconf.h> #include <linux/pinctrl/pinmux.h> #include "core.h" #include "pinctrl-utils.h" /* GPIOs expander */ /* GPIO_STATE1 0x10, GPIO_STATE2 0x11, GPIO_STATE3 0x12 */ #define STMFX_REG_GPIO_STATE … /* GPIO_DIR1 0x60, GPIO_DIR2 0x61, GPIO_DIR3 0x63 */ #define STMFX_REG_GPIO_DIR … /* GPIO_TYPE1 0x64, GPIO_TYPE2 0x65, GPIO_TYPE3 0x66 */ #define STMFX_REG_GPIO_TYPE … /* GPIO_PUPD1 0x68, GPIO_PUPD2 0x69, GPIO_PUPD3 0x6A */ #define STMFX_REG_GPIO_PUPD … /* GPO_SET1 0x6C, GPO_SET2 0x6D, GPO_SET3 0x6E */ #define STMFX_REG_GPO_SET … /* GPO_CLR1 0x70, GPO_CLR2 0x71, GPO_CLR3 0x72 */ #define STMFX_REG_GPO_CLR … /* IRQ_GPI_SRC1 0x48, IRQ_GPI_SRC2 0x49, IRQ_GPI_SRC3 0x4A */ #define STMFX_REG_IRQ_GPI_SRC … /* IRQ_GPI_EVT1 0x4C, IRQ_GPI_EVT2 0x4D, IRQ_GPI_EVT3 0x4E */ #define STMFX_REG_IRQ_GPI_EVT … /* IRQ_GPI_TYPE1 0x50, IRQ_GPI_TYPE2 0x51, IRQ_GPI_TYPE3 0x52 */ #define STMFX_REG_IRQ_GPI_TYPE … /* IRQ_GPI_PENDING1 0x0C, IRQ_GPI_PENDING2 0x0D, IRQ_GPI_PENDING3 0x0E*/ #define STMFX_REG_IRQ_GPI_PENDING … /* IRQ_GPI_ACK1 0x54, IRQ_GPI_ACK2 0x55, IRQ_GPI_ACK3 0x56 */ #define STMFX_REG_IRQ_GPI_ACK … #define NR_GPIO_REGS … #define NR_GPIOS_PER_REG … #define get_reg(offset) … #define get_shift(offset) … #define get_mask(offset) … /* * STMFX pinctrl can have up to 24 pins if STMFX other functions are not used. * Pins availability is managed thanks to gpio-ranges property. */ static const struct pinctrl_pin_desc stmfx_pins[] = …; struct stmfx_pinctrl { … }; static int stmfx_gpio_get(struct gpio_chip *gc, unsigned int offset) { … } static void stmfx_gpio_set(struct gpio_chip *gc, unsigned int offset, int value) { … } static int stmfx_gpio_get_direction(struct gpio_chip *gc, unsigned int offset) { … } static int stmfx_gpio_direction_input(struct gpio_chip *gc, unsigned int offset) { … } static int stmfx_gpio_direction_output(struct gpio_chip *gc, unsigned int offset, int value) { … } static int stmfx_pinconf_get_pupd(struct stmfx_pinctrl *pctl, unsigned int offset) { … } static int stmfx_pinconf_set_pupd(struct stmfx_pinctrl *pctl, unsigned int offset, u32 pupd) { … } static int stmfx_pinconf_get_type(struct stmfx_pinctrl *pctl, unsigned int offset) { … } static int stmfx_pinconf_set_type(struct stmfx_pinctrl *pctl, unsigned int offset, u32 type) { … } static int stmfx_pinconf_get(struct pinctrl_dev *pctldev, unsigned int pin, unsigned long *config) { … } static int stmfx_pinconf_set(struct pinctrl_dev *pctldev, unsigned int pin, unsigned long *configs, unsigned int num_configs) { … } static void stmfx_pinconf_dbg_show(struct pinctrl_dev *pctldev, struct seq_file *s, unsigned int offset) { … } static const struct pinconf_ops stmfx_pinconf_ops = …; static int stmfx_pinctrl_get_groups_count(struct pinctrl_dev *pctldev) { … } static const char *stmfx_pinctrl_get_group_name(struct pinctrl_dev *pctldev, unsigned int selector) { … } static int stmfx_pinctrl_get_group_pins(struct pinctrl_dev *pctldev, unsigned int selector, const unsigned int **pins, unsigned int *num_pins) { … } static const struct pinctrl_ops stmfx_pinctrl_ops = …; static void stmfx_pinctrl_irq_mask(struct irq_data *data) { … } static void stmfx_pinctrl_irq_unmask(struct irq_data *data) { … } static int stmfx_pinctrl_irq_set_type(struct irq_data *data, unsigned int type) { … } static void stmfx_pinctrl_irq_bus_lock(struct irq_data *data) { … } static void stmfx_pinctrl_irq_bus_sync_unlock(struct irq_data *data) { … } static int stmfx_gpio_irq_request_resources(struct irq_data *data) { … } static void stmfx_gpio_irq_release_resources(struct irq_data *data) { … } static void stmfx_pinctrl_irq_toggle_trigger(struct stmfx_pinctrl *pctl, unsigned int offset) { … } static irqreturn_t stmfx_pinctrl_irq_thread_fn(int irq, void *dev_id) { … } static void stmfx_pinctrl_irq_print_chip(struct irq_data *d, struct seq_file *p) { … } static const struct irq_chip stmfx_pinctrl_irq_chip = …; static int stmfx_pinctrl_gpio_function_enable(struct stmfx_pinctrl *pctl) { … } static int stmfx_pinctrl_probe(struct platform_device *pdev) { … } static void stmfx_pinctrl_remove(struct platform_device *pdev) { … } #ifdef CONFIG_PM_SLEEP static int stmfx_pinctrl_backup_regs(struct stmfx_pinctrl *pctl) { … } static int stmfx_pinctrl_restore_regs(struct stmfx_pinctrl *pctl) { … } static int stmfx_pinctrl_suspend(struct device *dev) { … } static int stmfx_pinctrl_resume(struct device *dev) { … } #endif static SIMPLE_DEV_PM_OPS(stmfx_pinctrl_dev_pm_ops, stmfx_pinctrl_suspend, stmfx_pinctrl_resume); static const struct of_device_id stmfx_pinctrl_of_match[] = …; MODULE_DEVICE_TABLE(of, stmfx_pinctrl_of_match); static struct platform_driver stmfx_pinctrl_driver = …; module_platform_driver(…) …; MODULE_DESCRIPTION(…) …; MODULE_AUTHOR(…) …; MODULE_LICENSE(…) …;
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