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gpio: Add support for Maxim MAX96752F GPIO controller

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Signed-off-by: Wyon Bi <bivvy.bi@rock-chips.com>
Change-Id: Ib94de1c8ac1af44f0f3b61aa5eccff8dda741450
This commit is contained in:
Wyon Bi
2022-05-02 02:13:26 +00:00
committed by Tao Huang
parent 530d7e8c7c
commit 673d3358b0
3 changed files with 112 additions and 0 deletions
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7
drivers/gpio/Kconfig
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@@ -1235,6 +1235,13 @@ config GPIO_MAX77650
GPIO driver for MAX77650/77651 PMIC from Maxim Semiconductor.
These chips have a single pin that can be configured as GPIO.
config GPIO_MAX96752F
tristate "MAX96752F GPIO"
depends on MFD_MAX96752F
help
Select this option to enable GPIO driver for the MAX96752F
chip.
config GPIO_MSIC
bool "Intel MSIC mixed signal gpio support"
depends on (X86 || COMPILE_TEST) && MFD_INTEL_MSIC

1
drivers/gpio/Makefile
View File

@@ -88,6 +88,7 @@ obj-$(CONFIG_GPIO_MAX730X) += gpio-max730x.o
obj-$(CONFIG_GPIO_MAX732X) += gpio-max732x.o
obj-$(CONFIG_GPIO_MAX77620) += gpio-max77620.o
obj-$(CONFIG_GPIO_MAX77650) += gpio-max77650.o
obj-$(CONFIG_GPIO_MAX96752F) += gpio-max96752f.o
obj-$(CONFIG_GPIO_MB86S7X) += gpio-mb86s7x.o
obj-$(CONFIG_GPIO_MC33880) += gpio-mc33880.o
obj-$(CONFIG_GPIO_MC9S08DZ60) += gpio-mc9s08dz60.o

104
drivers/gpio/gpio-max96752f.c Normal file
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@@ -0,0 +1,104 @@
// SPDX-License-Identifier: GPL-2.0-only
/*
* Maxim MAX96752F GPIO driver
*
* Copyright (C) 2022 Rockchip Electronics Co. Ltd.
*/
#include <linux/gpio/driver.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/regmap.h>
#include <linux/mfd/max96752f.h>
struct max96752f_gpio {
struct device *dev;
struct regmap *regmap;
struct gpio_chip gpio_chip;
};
static int max96752f_gpio_direction_output(struct gpio_chip *gc,
unsigned int offset, int value)
{
struct max96752f_gpio *gpio = gpiochip_get_data(gc);
regmap_update_bits(gpio->regmap, GPIO_A_REG(offset),
GPIO_OUT_DIS | GPIO_OUT,
FIELD_PREP(GPIO_OUT_DIS, 0) |
FIELD_PREP(GPIO_OUT, value));
return 0;
}
static void max96752f_gpio_set(struct gpio_chip *gc, unsigned int offset,
int value)
{
struct max96752f_gpio *gpio = gpiochip_get_data(gc);
regmap_update_bits(gpio->regmap, GPIO_A_REG(offset), GPIO_OUT,
FIELD_PREP(GPIO_OUT, value));
}
static int max96752f_gpio_get(struct gpio_chip *gc, unsigned int offset)
{
struct max96752f_gpio *gpio = gpiochip_get_data(gc);
unsigned int value;
regmap_read(gpio->regmap, GPIO_A_REG(offset), &value);
return !!FIELD_GET(GPIO_OUT, value);
}
static int max96752f_gpio_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct max96752f_gpio *gpio;
int ret;
gpio = devm_kzalloc(dev, sizeof(*gpio), GFP_KERNEL);
if (!gpio)
return -ENOMEM;
gpio->dev = dev;
platform_set_drvdata(pdev, gpio);
gpio->regmap = dev_get_regmap(dev->parent, NULL);
if (!gpio->regmap)
return dev_err_probe(dev, -ENODEV, "failed to get regmap\n");
gpio->gpio_chip.of_node = dev->of_node;
gpio->gpio_chip.label = dev_name(dev);
gpio->gpio_chip.parent = dev->parent;
gpio->gpio_chip.direction_output = max96752f_gpio_direction_output;
gpio->gpio_chip.set = max96752f_gpio_set;
gpio->gpio_chip.get = max96752f_gpio_get;
gpio->gpio_chip.ngpio = 16;
gpio->gpio_chip.can_sleep = true;
gpio->gpio_chip.base = -1;
ret = devm_gpiochip_add_data(dev, &gpio->gpio_chip, gpio);
if (ret)
return dev_err_probe(dev, ret, "failed to add gpio chip\n");
return 0;
}
static const struct of_device_id max96752f_gpio_of_match[] = {
{ .name = "maxim,max96752f-gpio", },
{}
};
MODULE_DEVICE_TABLE(of, max96752f_gpio_of_match);
static struct platform_driver max96752f_gpio_driver = {
.driver = {
.name = "max96752f-gpio",
.of_match_table = max96752f_gpio_of_match,
},
.probe = max96752f_gpio_probe,
};
module_platform_driver(max96752f_gpio_driver);
MODULE_AUTHOR("Wyon Bi <bivvy.bi@rock-chips.com>");
MODULE_DESCRIPTION("Maxim MAX96752F GPIO driver");
MODULE_LICENSE("GPL");