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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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gpio: lp87565: Add support for GPIO
Add driver for lp87565 PMIC family GPIOs. Three GPIOs are supported and can be configured in Open-drain output or Push-pull output. Signed-off-by: Keerthy <j-keerthy@ti.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This commit is contained in:
Keerthy
Linus Walleij
parent
edadced2bc
commit
5c7f2c76cd
@ -954,6 +954,16 @@ config GPIO_LP873X
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This driver can also be built as a module. If so, the module will be
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called gpio-lp873x.
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config GPIO_LP87565
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tristate "TI LP87565 GPIO"
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depends on MFD_TI_LP87565
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help
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This driver supports the GPIO on TI Lp873565 PMICs. 3 GPIOs are present
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on LP87565 PMICs.
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This driver can also be built as a module. If so, the module will be
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called gpio-lp87565.
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config GPIO_MAX77620
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tristate "GPIO support for PMIC MAX77620 and MAX20024"
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depends on MFD_MAX77620
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@ -66,6 +66,7 @@ obj-$(CONFIG_GPIO_LP3943) += gpio-lp3943.o
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obj-$(CONFIG_GPIO_LPC18XX) += gpio-lpc18xx.o
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obj-$(CONFIG_ARCH_LPC32XX) += gpio-lpc32xx.o
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obj-$(CONFIG_GPIO_LP873X) += gpio-lp873x.o
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obj-$(CONFIG_GPIO_LP87565) += gpio-lp87565.o
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obj-$(CONFIG_GPIO_LYNXPOINT) += gpio-lynxpoint.o
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obj-$(CONFIG_GPIO_MAX730X) += gpio-max730x.o
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obj-$(CONFIG_GPIO_MAX7300) += gpio-max7300.o
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190
drivers/gpio/gpio-lp87565.c
Normal file
190
drivers/gpio/gpio-lp87565.c
Normal file
@ -0,0 +1,190 @@
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/*
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* Copyright (C) 2017 Texas Instruments Incorporated - http://www.ti.com/
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* Keerthy <j-keerthy@ti.com>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* This program is distributed "as is" WITHOUT ANY WARRANTY of any
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* kind, whether expressed or implied; without even the implied warranty
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* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License version 2 for more details.
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*
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* Based on the LP873X driver
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*/
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#include <linux/gpio/driver.h>
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#include <linux/module.h>
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#include <linux/platform_device.h>
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#include <linux/regmap.h>
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#include <linux/mfd/lp87565.h>
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struct lp87565_gpio {
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struct gpio_chip chip;
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struct regmap *map;
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};
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static int lp87565_gpio_get_direction(struct gpio_chip *chip,
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unsigned int offset)
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{
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struct lp87565_gpio *gpio = gpiochip_get_data(chip);
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int ret, val;
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ret = regmap_read(gpio->map, LP87565_REG_GPIO_CONFIG, &val);
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if (ret < 0)
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return ret;
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return !(val & BIT(offset));
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}
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static int lp87565_gpio_direction_input(struct gpio_chip *chip,
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unsigned int offset)
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{
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struct lp87565_gpio *gpio = gpiochip_get_data(chip);
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return regmap_update_bits(gpio->map,
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LP87565_REG_GPIO_CONFIG,
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BIT(offset), 0);
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}
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static int lp87565_gpio_direction_output(struct gpio_chip *chip,
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unsigned int offset, int value)
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{
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struct lp87565_gpio *gpio = gpiochip_get_data(chip);
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return regmap_update_bits(gpio->map,
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LP87565_REG_GPIO_CONFIG,
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BIT(offset), !value ? BIT(offset) : 0);
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}
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static int lp87565_gpio_get(struct gpio_chip *chip, unsigned int offset)
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{
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struct lp87565_gpio *gpio = gpiochip_get_data(chip);
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int ret, val;
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ret = regmap_read(gpio->map, LP87565_REG_GPIO_IN, &val);
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if (ret < 0)
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return ret;
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return !!(val & BIT(offset));
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}
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static void lp87565_gpio_set(struct gpio_chip *chip, unsigned int offset,
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int value)
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{
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struct lp87565_gpio *gpio = gpiochip_get_data(chip);
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regmap_update_bits(gpio->map, LP87565_REG_GPIO_OUT,
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BIT(offset), value ? BIT(offset) : 0);
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}
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static int lp87565_gpio_request(struct gpio_chip *gc, unsigned int offset)
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{
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struct lp87565_gpio *gpio = gpiochip_get_data(gc);
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int ret;
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switch (offset) {
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case 0:
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case 1:
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case 2:
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/*
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* MUX can program the pin to be in EN1/2/3 pin mode
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* Or GPIO1/2/3 mode.
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* Setup the GPIO*_SEL MUX to GPIO mode
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*/
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ret = regmap_update_bits(gpio->map,
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LP87565_REG_PIN_FUNCTION,
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BIT(offset), BIT(offset));
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if (ret)
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return ret;
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break;
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default:
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return -EINVAL;
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}
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return 0;
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}
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static int lp87565_gpio_set_config(struct gpio_chip *gc, unsigned int offset,
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unsigned long config)
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{
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struct lp87565_gpio *gpio = gpiochip_get_data(gc);
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switch (pinconf_to_config_param(config)) {
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case PIN_CONFIG_DRIVE_OPEN_DRAIN:
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return regmap_update_bits(gpio->map,
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LP87565_REG_GPIO_CONFIG,
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BIT(offset +
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__ffs(LP87565_GOIO1_OD)),
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BIT(offset +
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__ffs(LP87565_GOIO1_OD)));
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case PIN_CONFIG_DRIVE_PUSH_PULL:
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return regmap_update_bits(gpio->map,
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LP87565_REG_GPIO_CONFIG,
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BIT(offset +
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__ffs(LP87565_GOIO1_OD)), 0);
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default:
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return -ENOTSUPP;
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}
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}
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static const struct gpio_chip template_chip = {
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.label = "lp87565-gpio",
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.owner = THIS_MODULE,
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.request = lp87565_gpio_request,
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.get_direction = lp87565_gpio_get_direction,
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.direction_input = lp87565_gpio_direction_input,
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.direction_output = lp87565_gpio_direction_output,
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.get = lp87565_gpio_get,
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.set = lp87565_gpio_set,
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.set_config = lp87565_gpio_set_config,
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.base = -1,
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.ngpio = 3,
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.can_sleep = true,
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};
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static int lp87565_gpio_probe(struct platform_device *pdev)
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{
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struct lp87565_gpio *gpio;
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struct lp87565 *lp87565;
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int ret;
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gpio = devm_kzalloc(&pdev->dev, sizeof(*gpio), GFP_KERNEL);
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if (!gpio)
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return -ENOMEM;
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lp87565 = dev_get_drvdata(pdev->dev.parent);
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gpio->chip = template_chip;
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gpio->chip.parent = lp87565->dev;
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gpio->map = lp87565->regmap;
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ret = devm_gpiochip_add_data(&pdev->dev, &gpio->chip, gpio);
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if (ret < 0) {
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dev_err(&pdev->dev, "Could not register gpiochip, %d\n", ret);
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return ret;
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}
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return 0;
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}
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static const struct platform_device_id lp87565_gpio_id_table[] = {
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{ "lp87565-q1-gpio", },
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{ /* sentinel */ }
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};
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MODULE_DEVICE_TABLE(platform, lp87565_gpio_id_table);
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static struct platform_driver lp87565_gpio_driver = {
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.driver = {
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.name = "lp87565-gpio",
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},
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.probe = lp87565_gpio_probe,
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.id_table = lp87565_gpio_id_table,
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};
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module_platform_driver(lp87565_gpio_driver);
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MODULE_AUTHOR("Keerthy <j-keerthy@ti.com>");
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MODULE_DESCRIPTION("LP87565 GPIO driver");
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MODULE_LICENSE("GPL v2");
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