mirror of
https://github.com/BobTheBlinker/android_kernel_motorola_sm6375.git
synced 2026-10-30 11:41:38 -04:00
pinctrl: move gpio-axp209 to pinctrl
To prepare the driver for the upcoming pinctrl features, move the GPIO driver AXP209 from GPIO to pinctrl subsystem. Signed-off-by: Quentin Schulz <[email protected]> Acked-by: Maxime Ripard <[email protected]> Acked-by: Chen-Yu Tsai <[email protected]> Signed-off-by: Linus Walleij <[email protected]>
This commit is contained in:
Quentin Schulz
Linus Walleij
parent
3cac991e33
commit
449317a8b4
5 changed files with 11 additions and 7 deletions
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@ -63,6 +63,16 @@ config PINCTRL_AS3722
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open drain configuration for the GPIO pins of AS3722 devices. It also
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supports the GPIO functionality through gpiolib.
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config PINCTRL_AXP209
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tristate "X-Powers AXP209 PMIC pinctrl and GPIO Support"
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depends on MFD_AXP20X
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help
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AXP PMICs provides multiple GPIOs that can be muxed for different
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functions. This driver bundles a pinctrl driver to select the function
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muxing and a GPIO driver to handle the GPIO when the GPIO function is
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selected.
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Say yes to enable pinctrl and GPIO support for the AXP209 PMIC
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config PINCTRL_BF54x
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def_bool y if BF54x
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select PINCTRL_ADI2
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@ -11,6 +11,7 @@ obj-$(CONFIG_GENERIC_PINCONF) += pinconf-generic.o
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obj-$(CONFIG_PINCTRL_ADI2) += pinctrl-adi2.o
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obj-$(CONFIG_PINCTRL_ARTPEC6) += pinctrl-artpec6.o
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obj-$(CONFIG_PINCTRL_AS3722) += pinctrl-as3722.o
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obj-$(CONFIG_PINCTRL_AXP209) += pinctrl-axp209.o
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obj-$(CONFIG_PINCTRL_BF54x) += pinctrl-adi2-bf54x.o
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obj-$(CONFIG_PINCTRL_BF60x) += pinctrl-adi2-bf60x.o
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obj-$(CONFIG_PINCTRL_AT91) += pinctrl-at91.o
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189
drivers/pinctrl/pinctrl-axp209.c
Normal file
189
drivers/pinctrl/pinctrl-axp209.c
Normal file
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@ -0,0 +1,189 @@
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/*
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* AXP20x GPIO driver
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*
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* Copyright (C) 2016 Maxime Ripard <maxime.ripard@free-electrons.com>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*/
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#include <linux/bitops.h>
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#include <linux/device.h>
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#include <linux/gpio/driver.h>
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#include <linux/init.h>
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#include <linux/interrupt.h>
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#include <linux/kernel.h>
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#include <linux/mfd/axp20x.h>
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#include <linux/module.h>
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#include <linux/of.h>
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#include <linux/platform_device.h>
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#include <linux/regmap.h>
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#include <linux/slab.h>
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#define AXP20X_GPIO_FUNCTIONS 0x7
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#define AXP20X_GPIO_FUNCTION_OUT_LOW 0
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#define AXP20X_GPIO_FUNCTION_OUT_HIGH 1
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#define AXP20X_GPIO_FUNCTION_INPUT 2
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struct axp20x_gpio {
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struct gpio_chip chip;
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struct regmap *regmap;
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};
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static int axp20x_gpio_get_reg(unsigned int offset)
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{
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switch (offset) {
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case 0:
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return AXP20X_GPIO0_CTRL;
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case 1:
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return AXP20X_GPIO1_CTRL;
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case 2:
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return AXP20X_GPIO2_CTRL;
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}
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return -EINVAL;
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}
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static int axp20x_gpio_input(struct gpio_chip *chip, unsigned int offset)
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{
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struct axp20x_gpio *gpio = gpiochip_get_data(chip);
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int reg;
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reg = axp20x_gpio_get_reg(offset);
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if (reg < 0)
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return reg;
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return regmap_update_bits(gpio->regmap, reg,
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AXP20X_GPIO_FUNCTIONS,
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AXP20X_GPIO_FUNCTION_INPUT);
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}
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static int axp20x_gpio_get(struct gpio_chip *chip, unsigned int offset)
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{
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struct axp20x_gpio *gpio = gpiochip_get_data(chip);
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unsigned int val;
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int ret;
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ret = regmap_read(gpio->regmap, AXP20X_GPIO20_SS, &val);
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if (ret)
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return ret;
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return !!(val & BIT(offset + 4));
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}
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static int axp20x_gpio_get_direction(struct gpio_chip *chip,
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unsigned int offset)
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{
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struct axp20x_gpio *gpio = gpiochip_get_data(chip);
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unsigned int val;
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int reg, ret;
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reg = axp20x_gpio_get_reg(offset);
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if (reg < 0)
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return reg;
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ret = regmap_read(gpio->regmap, reg, &val);
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if (ret)
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return ret;
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/*
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* This shouldn't really happen if the pin is in use already,
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* or if it's not in use yet, it doesn't matter since we're
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* going to change the value soon anyway. Default to output.
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*/
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if ((val & AXP20X_GPIO_FUNCTIONS) > 2)
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return 0;
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/*
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* The GPIO directions are the three lowest values.
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* 2 is input, 0 and 1 are output
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*/
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return val & 2;
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}
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static int axp20x_gpio_output(struct gpio_chip *chip, unsigned int offset,
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int value)
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{
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struct axp20x_gpio *gpio = gpiochip_get_data(chip);
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int reg;
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reg = axp20x_gpio_get_reg(offset);
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if (reg < 0)
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return reg;
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return regmap_update_bits(gpio->regmap, reg,
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AXP20X_GPIO_FUNCTIONS,
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value ? AXP20X_GPIO_FUNCTION_OUT_HIGH
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: AXP20X_GPIO_FUNCTION_OUT_LOW);
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}
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static void axp20x_gpio_set(struct gpio_chip *chip, unsigned int offset,
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int value)
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{
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axp20x_gpio_output(chip, offset, value);
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}
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static int axp20x_gpio_probe(struct platform_device *pdev)
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{
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struct axp20x_dev *axp20x = dev_get_drvdata(pdev->dev.parent);
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struct axp20x_gpio *gpio;
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int ret;
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if (!of_device_is_available(pdev->dev.of_node))
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return -ENODEV;
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if (!axp20x) {
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dev_err(&pdev->dev, "Parent drvdata not set\n");
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return -EINVAL;
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}
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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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gpio->chip.base = -1;
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gpio->chip.can_sleep = true;
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gpio->chip.parent = &pdev->dev;
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gpio->chip.label = dev_name(&pdev->dev);
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gpio->chip.owner = THIS_MODULE;
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gpio->chip.get = axp20x_gpio_get;
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gpio->chip.get_direction = axp20x_gpio_get_direction;
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gpio->chip.set = axp20x_gpio_set;
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gpio->chip.direction_input = axp20x_gpio_input;
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gpio->chip.direction_output = axp20x_gpio_output;
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gpio->chip.ngpio = 3;
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gpio->regmap = axp20x->regmap;
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ret = devm_gpiochip_add_data(&pdev->dev, &gpio->chip, gpio);
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if (ret) {
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dev_err(&pdev->dev, "Failed to register GPIO chip\n");
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return ret;
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}
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dev_info(&pdev->dev, "AXP209 GPIO driver loaded\n");
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return 0;
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}
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static const struct of_device_id axp20x_gpio_match[] = {
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{ .compatible = "x-powers,axp209-gpio" },
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{ }
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};
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MODULE_DEVICE_TABLE(of, axp20x_gpio_match);
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static struct platform_driver axp20x_gpio_driver = {
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.probe = axp20x_gpio_probe,
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.driver = {
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.name = "axp20x-gpio",
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.of_match_table = axp20x_gpio_match,
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},
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};
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module_platform_driver(axp20x_gpio_driver);
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MODULE_AUTHOR("Maxime Ripard <[email protected]>");
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MODULE_DESCRIPTION("AXP20x PMIC GPIO driver");
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MODULE_LICENSE("GPL");
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