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https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2025-08-24 19:24:47 +00:00
d9d87d90cc
The conversion of all GPIO drivers to using the .set_rv() and .set_multiple_rv() callbacks from struct gpio_chip (which - unlike their predecessors - return an integer and allow the controller drivers to indicate failures to users) is now complete and the legacy ones have been removed. Rename the new callbacks back to their original names in one sweeping change. Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
133 lines
3.0 KiB
C
133 lines
3.0 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Copyright (C) 2015-2023 Texas Instruments Incorporated - https://www.ti.com/
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* Andrew Davis <afd@ti.com>
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*/
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#include <linux/gpio/driver.h>
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#include <linux/i2c.h>
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#include <linux/module.h>
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#include <linux/mutex.h>
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#define TPIC2810_WS_COMMAND 0x44
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/**
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* struct tpic2810 - GPIO driver data
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* @chip: GPIO controller chip
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* @client: I2C device pointer
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* @buffer: Buffer for device register
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* @lock: Protects write sequences
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*/
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struct tpic2810 {
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struct gpio_chip chip;
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struct i2c_client *client;
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u8 buffer;
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struct mutex lock;
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};
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static int tpic2810_set(struct gpio_chip *chip, unsigned int offset, int value);
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static int tpic2810_get_direction(struct gpio_chip *chip,
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unsigned offset)
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{
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/* This device always output */
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return GPIO_LINE_DIRECTION_OUT;
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}
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static int tpic2810_direction_output(struct gpio_chip *chip,
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unsigned offset, int value)
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{
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/* This device always output */
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return tpic2810_set(chip, offset, value);
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}
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static void tpic2810_set_mask_bits(struct gpio_chip *chip, u8 mask, u8 bits)
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{
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struct tpic2810 *gpio = gpiochip_get_data(chip);
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u8 buffer;
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int err;
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mutex_lock(&gpio->lock);
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buffer = gpio->buffer & ~mask;
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buffer |= (mask & bits);
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err = i2c_smbus_write_byte_data(gpio->client, TPIC2810_WS_COMMAND,
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buffer);
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if (!err)
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gpio->buffer = buffer;
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mutex_unlock(&gpio->lock);
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}
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static int tpic2810_set(struct gpio_chip *chip, unsigned int offset, int value)
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{
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tpic2810_set_mask_bits(chip, BIT(offset), value ? BIT(offset) : 0);
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return 0;
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}
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static int tpic2810_set_multiple(struct gpio_chip *chip, unsigned long *mask,
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unsigned long *bits)
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{
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tpic2810_set_mask_bits(chip, *mask, *bits);
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return 0;
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}
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static const struct gpio_chip template_chip = {
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.label = "tpic2810",
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.owner = THIS_MODULE,
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.get_direction = tpic2810_get_direction,
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.direction_output = tpic2810_direction_output,
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.set = tpic2810_set,
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.set_multiple = tpic2810_set_multiple,
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.base = -1,
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.ngpio = 8,
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.can_sleep = true,
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};
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static const struct of_device_id tpic2810_of_match_table[] = {
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{ .compatible = "ti,tpic2810" },
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{ /* sentinel */ }
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};
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MODULE_DEVICE_TABLE(of, tpic2810_of_match_table);
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static int tpic2810_probe(struct i2c_client *client)
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{
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struct tpic2810 *gpio;
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gpio = devm_kzalloc(&client->dev, sizeof(*gpio), GFP_KERNEL);
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if (!gpio)
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return -ENOMEM;
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gpio->chip = template_chip;
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gpio->chip.parent = &client->dev;
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gpio->client = client;
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mutex_init(&gpio->lock);
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return devm_gpiochip_add_data(&client->dev, &gpio->chip, gpio);
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}
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static const struct i2c_device_id tpic2810_id_table[] = {
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{ "tpic2810", },
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{ /* sentinel */ }
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};
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MODULE_DEVICE_TABLE(i2c, tpic2810_id_table);
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static struct i2c_driver tpic2810_driver = {
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.driver = {
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.name = "tpic2810",
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.of_match_table = tpic2810_of_match_table,
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},
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.probe = tpic2810_probe,
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.id_table = tpic2810_id_table,
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};
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module_i2c_driver(tpic2810_driver);
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MODULE_AUTHOR("Andrew Davis <afd@ti.com>");
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MODULE_DESCRIPTION("TPIC2810 8-Bit LED Driver GPIO Driver");
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MODULE_LICENSE("GPL v2");
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