// SPDX-License-Identifier: GPL-2.0-only /* * Copyright (c) 2016, BayLibre, SAS. All rights reserved. * Author: Neil Armstrong <[email protected]> * * Copyright (c) 2010, Code Aurora Forum. All rights reserved. * * Driver for Semtech SX150X I2C GPIO Expanders * The handling of the 4-bit chips (SX1501/SX1504/SX1507) is untested. * * Author: Gregory Bean <[email protected]> */ #include <linux/regmap.h> #include <linux/i2c.h> #include <linux/init.h> #include <linux/interrupt.h> #include <linux/irq.h> #include <linux/mutex.h> #include <linux/slab.h> #include <linux/of.h> #include <linux/gpio/driver.h> #include <linux/pinctrl/pinconf.h> #include <linux/pinctrl/pinctrl.h> #include <linux/pinctrl/pinmux.h> #include <linux/pinctrl/pinconf-generic.h> #include "core.h" #include "pinconf.h" #include "pinctrl-utils.h" /* The chip models of sx150x */ enum { … }; enum { … }; struct sx150x_123_pri { … }; struct sx150x_456_pri { … }; struct sx150x_789_pri { … }; struct sx150x_device_data { … }; struct sx150x_pinctrl { … }; static const struct pinctrl_pin_desc sx150x_4_pins[] = …; static const struct pinctrl_pin_desc sx150x_8_pins[] = …; static const struct pinctrl_pin_desc sx150x_16_pins[] = …; static const struct sx150x_device_data sx1501q_device_data = …; static const struct sx150x_device_data sx1502q_device_data = …; static const struct sx150x_device_data sx1503q_device_data = …; static const struct sx150x_device_data sx1504q_device_data = …; static const struct sx150x_device_data sx1505q_device_data = …; static const struct sx150x_device_data sx1506q_device_data = …; static const struct sx150x_device_data sx1507q_device_data = …; static const struct sx150x_device_data sx1508q_device_data = …; static const struct sx150x_device_data sx1509q_device_data = …; static int sx150x_pinctrl_get_groups_count(struct pinctrl_dev *pctldev) { … } static const char *sx150x_pinctrl_get_group_name(struct pinctrl_dev *pctldev, unsigned int group) { … } static int sx150x_pinctrl_get_group_pins(struct pinctrl_dev *pctldev, unsigned int group, const unsigned int **pins, unsigned int *num_pins) { … } static const struct pinctrl_ops sx150x_pinctrl_ops = …; static bool sx150x_pin_is_oscio(struct sx150x_pinctrl *pctl, unsigned int pin) { … } static int sx150x_gpio_get_direction(struct gpio_chip *chip, unsigned int offset) { … } static int sx150x_gpio_get(struct gpio_chip *chip, unsigned int offset) { … } static int __sx150x_gpio_set(struct sx150x_pinctrl *pctl, unsigned int offset, int value) { … } static int sx150x_gpio_oscio_set(struct sx150x_pinctrl *pctl, int value) { … } static void sx150x_gpio_set(struct gpio_chip *chip, unsigned int offset, int value) { … } static void sx150x_gpio_set_multiple(struct gpio_chip *chip, unsigned long *mask, unsigned long *bits) { … } static int sx150x_gpio_direction_input(struct gpio_chip *chip, unsigned int offset) { … } static int sx150x_gpio_direction_output(struct gpio_chip *chip, unsigned int offset, int value) { … } static void sx150x_irq_mask(struct irq_data *d) { … } static void sx150x_irq_unmask(struct irq_data *d) { … } static void sx150x_irq_set_sense(struct sx150x_pinctrl *pctl, unsigned int line, unsigned int sense) { … } static int sx150x_irq_set_type(struct irq_data *d, unsigned int flow_type) { … } static irqreturn_t sx150x_irq_thread_fn(int irq, void *dev_id) { … } static void sx150x_irq_bus_lock(struct irq_data *d) { … } static void sx150x_irq_bus_sync_unlock(struct irq_data *d) { … } static void sx150x_irq_print_chip(struct irq_data *d, struct seq_file *p) { … } static const struct irq_chip sx150x_irq_chip = …; static int sx150x_pinconf_get(struct pinctrl_dev *pctldev, unsigned int pin, unsigned long *config) { … } static int sx150x_pinconf_set(struct pinctrl_dev *pctldev, unsigned int pin, unsigned long *configs, unsigned int num_configs) { … } static const struct pinconf_ops sx150x_pinconf_ops = …; static const struct i2c_device_id sx150x_id[] = …; static const struct of_device_id sx150x_of_match[] = …; static int sx150x_reset(struct sx150x_pinctrl *pctl) { … } static int sx150x_init_misc(struct sx150x_pinctrl *pctl) { … } static int sx150x_init_hw(struct sx150x_pinctrl *pctl) { … } static int sx150x_regmap_reg_width(struct sx150x_pinctrl *pctl, unsigned int reg) { … } static unsigned int sx150x_maybe_swizzle(struct sx150x_pinctrl *pctl, unsigned int reg, unsigned int val) { … } /* * In order to mask the differences between 16 and 8 bit expander * devices we set up a sligthly ficticious regmap that pretends to be * a set of 32-bit (to accommodate RegSenseLow/RegSenseHigh * pair/quartet) registers and transparently reconstructs those * registers via multiple I2C/SMBus reads * * This way the rest of the driver code, interfacing with the chip via * regmap API, can work assuming that each GPIO pin is represented by * a group of bits at an offset proportional to GPIO number within a * given register. */ static int sx150x_regmap_reg_read(void *context, unsigned int reg, unsigned int *result) { … } static int sx150x_regmap_reg_write(void *context, unsigned int reg, unsigned int val) { … } static bool sx150x_reg_volatile(struct device *dev, unsigned int reg) { … } static const struct regmap_config sx150x_regmap_config = …; static int sx150x_probe(struct i2c_client *client) { … } static struct i2c_driver sx150x_driver = …; static int __init sx150x_init(void) { … } subsys_initcall(sx150x_init);
Codebase Browser
linux