GPIO: DA9052 GPIO module v3 (07bfc915) · Commits · e / devices / android_kernel_oneplus_sm8150

drivers/gpio/Kconfig

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	@@ -68,6 +68,12 @@ config GPIO_GENERIC

	# put drivers in the right section, in alphabetical order		# put drivers in the right section, in alphabetical order

			config GPIO_DA9052
			tristate "Dialog DA9052 GPIO"
			depends on PMIC_DA9052
			help
			Say yes here to enable the GPIO driver for the DA9052 chip.

	config GPIO_MAX730X		config GPIO_MAX730X
	tristate		tristate

drivers/gpio/Makefile

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	@@ -13,6 +13,7 @@ obj-$(CONFIG_GPIO_ADP5520) += gpio-adp5520.o
	obj-$(CONFIG_GPIO_ADP5588) += gpio-adp5588.o		obj-$(CONFIG_GPIO_ADP5588) += gpio-adp5588.o
	obj-$(CONFIG_GPIO_BT8XX) += gpio-bt8xx.o		obj-$(CONFIG_GPIO_BT8XX) += gpio-bt8xx.o
	obj-$(CONFIG_GPIO_CS5535) += gpio-cs5535.o		obj-$(CONFIG_GPIO_CS5535) += gpio-cs5535.o
			obj-$(CONFIG_GPIO_DA9052) += gpio-da9052.o
	obj-$(CONFIG_GPIO_EP93XX) += gpio-ep93xx.o		obj-$(CONFIG_GPIO_EP93XX) += gpio-ep93xx.o
	obj-$(CONFIG_GPIO_EXYNOS4) += gpio-exynos4.o		obj-$(CONFIG_GPIO_EXYNOS4) += gpio-exynos4.o
	obj-$(CONFIG_GPIO_IT8761E) += gpio-it8761e.o		obj-$(CONFIG_GPIO_IT8761E) += gpio-it8761e.o

drivers/gpio/gpio-da9052.c

0 → 100644

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			/*
			* GPIO Driver for Dialog DA9052 PMICs.
			*
			* Copyright(c) 2011 Dialog Semiconductor Ltd.
			*
			* Author: David Dajun Chen <dchen@diasemi.com>
			*
			* This program is free software; you can redistribute it and/or modify it
			* under the terms of the GNU General Public License as published by the
			* Free Software Foundation; either version 2 of the License, or (at your
			* option) any later version.
			*
			*/
			#include <linux/module.h>
			#include <linux/fs.h>
			#include <linux/uaccess.h>
			#include <linux/platform_device.h>
			#include <linux/gpio.h>
			#include <linux/syscalls.h>
			#include <linux/seq_file.h>

			#include <linux/mfd/da9052/da9052.h>
			#include <linux/mfd/da9052/reg.h>
			#include <linux/mfd/da9052/pdata.h>
			#include <linux/mfd/da9052/gpio.h>

			#define DA9052_INPUT 1
			#define DA9052_OUTPUT_OPENDRAIN 2
			#define DA9052_OUTPUT_PUSHPULL 3

			#define DA9052_SUPPLY_VDD_IO1 0

			#define DA9052_DEBOUNCING_OFF 0
			#define DA9052_DEBOUNCING_ON 1

			#define DA9052_OUTPUT_LOWLEVEL 0

			#define DA9052_ACTIVE_LOW 0
			#define DA9052_ACTIVE_HIGH 1

			#define DA9052_GPIO_MAX_PORTS_PER_REGISTER 8
			#define DA9052_GPIO_SHIFT_COUNT(no) (no%8)
			#define DA9052_GPIO_MASK_UPPER_NIBBLE 0xF0
			#define DA9052_GPIO_MASK_LOWER_NIBBLE 0x0F
			#define DA9052_GPIO_NIBBLE_SHIFT 4

			struct da9052_gpio {
			struct da9052 *da9052;
			struct gpio_chip gp;
			};

			static inline struct da9052_gpio to_da9052_gpio(struct gpio_chip chip)
			{
			return container_of(chip, struct da9052_gpio, gp);
			}

			static unsigned char da9052_gpio_port_odd(unsigned offset)
			{
			return offset % 2;
			}

			static int da9052_gpio_get(struct gpio_chip *gc, unsigned offset)
			{
			struct da9052_gpio *gpio = to_da9052_gpio(gc);
			int da9052_port_direction = 0;
			int ret;

			ret = da9052_reg_read(gpio->da9052,
			DA9052_GPIO_0_1_REG + (offset >> 1));
			if (ret < 0)
			return ret;

			if (da9052_gpio_port_odd(offset)) {
			da9052_port_direction = ret & DA9052_GPIO_ODD_PORT_PIN;
			da9052_port_direction >>= 4;
			} else {
			da9052_port_direction = ret & DA9052_GPIO_EVEN_PORT_PIN;
			}

			switch (da9052_port_direction) {
			case DA9052_INPUT:
			if (offset < DA9052_GPIO_MAX_PORTS_PER_REGISTER)
			ret = da9052_reg_read(gpio->da9052,
			DA9052_STATUS_C_REG);
			else
			ret = da9052_reg_read(gpio->da9052,
			DA9052_STATUS_D_REG);
			if (ret < 0)
			return ret;
			if (ret & (1 << DA9052_GPIO_SHIFT_COUNT(offset)))
			return 1;
			else
			return 0;
			case DA9052_OUTPUT_PUSHPULL:
			if (da9052_gpio_port_odd(offset))
			return ret & DA9052_GPIO_ODD_PORT_MODE;
			else
			return ret & DA9052_GPIO_EVEN_PORT_MODE;
			default:
			return -EINVAL;
			}
			}

			static void da9052_gpio_set(struct gpio_chip *gc, unsigned offset, int value)
			{
			struct da9052_gpio *gpio = to_da9052_gpio(gc);
			unsigned char register_value = 0;
			int ret;

			if (da9052_gpio_port_odd(offset)) {
			if (value) {
			register_value = DA9052_GPIO_ODD_PORT_MODE;
			ret = da9052_reg_update(gpio->da9052, (offset >> 1) +
			DA9052_GPIO_0_1_REG,
			DA9052_GPIO_ODD_PORT_MODE,
			register_value);
			if (ret != 0)
			dev_err(gpio->da9052->dev,
			"Failed to updated gpio odd reg,%d",
			ret);
			}
			} else {
			if (value) {
			register_value = DA9052_GPIO_EVEN_PORT_MODE;
			ret = da9052_reg_update(gpio->da9052, (offset >> 1) +
			DA9052_GPIO_0_1_REG,
			DA9052_GPIO_EVEN_PORT_MODE,
			register_value);
			if (ret != 0)
			dev_err(gpio->da9052->dev,
			"Failed to updated gpio even reg,%d",
			ret);
			}
			}
			}

			static int da9052_gpio_direction_input(struct gpio_chip *gc, unsigned offset)
			{
			struct da9052_gpio *gpio = to_da9052_gpio(gc);
			unsigned char register_value;
			int ret;

			/* Format: function - 2 bits type - 1 bit mode - 1 bit */
			register_value = DA9052_INPUT \| DA9052_ACTIVE_LOW << 2 \|
			DA9052_DEBOUNCING_ON << 3;

			if (da9052_gpio_port_odd(offset))
			ret = da9052_reg_update(gpio->da9052, (offset >> 1) +
			DA9052_GPIO_0_1_REG,
			DA9052_GPIO_MASK_UPPER_NIBBLE,
			(register_value <<
			DA9052_GPIO_NIBBLE_SHIFT));
			else
			ret = da9052_reg_update(gpio->da9052, (offset >> 1) +
			DA9052_GPIO_0_1_REG,
			DA9052_GPIO_MASK_LOWER_NIBBLE,
			register_value);

			return ret;
			}

			static int da9052_gpio_direction_output(struct gpio_chip *gc,
			unsigned offset, int value)
			{
			struct da9052_gpio *gpio = to_da9052_gpio(gc);
			unsigned char register_value;
			int ret;

			/* Format: Function - 2 bits Type - 1 bit Mode - 1 bit */
			register_value = DA9052_OUTPUT_PUSHPULL \| DA9052_SUPPLY_VDD_IO1 << 2 \|
			value << 3;

			if (da9052_gpio_port_odd(offset))
			ret = da9052_reg_update(gpio->da9052, (offset >> 1) +
			DA9052_GPIO_0_1_REG,
			DA9052_GPIO_MASK_UPPER_NIBBLE,
			(register_value <<
			DA9052_GPIO_NIBBLE_SHIFT));
			else
			ret = da9052_reg_update(gpio->da9052, (offset >> 1) +
			DA9052_GPIO_0_1_REG,
			DA9052_GPIO_MASK_LOWER_NIBBLE,
			register_value);

			return ret;
			}

			static int da9052_gpio_to_irq(struct gpio_chip *gc, u32 offset)
			{
			struct da9052_gpio *gpio = to_da9052_gpio(gc);
			struct da9052 *da9052 = gpio->da9052;

			return da9052->irq_base + DA9052_IRQ_GPI0 + offset;
			}

			static struct gpio_chip reference_gp __devinitdata = {
			.label = "da9052-gpio",
			.owner = THIS_MODULE,
			.get = da9052_gpio_get,
			.set = da9052_gpio_set,
			.direction_input = da9052_gpio_direction_input,
			.direction_output = da9052_gpio_direction_output,
			.to_irq = da9052_gpio_to_irq,
			.can_sleep = 1;
			.ngpio = 16;
			.base = -1;
			};

			static int __devinit da9052_gpio_probe(struct platform_device *pdev)
			{
			struct da9052_gpio *gpio;
			struct da9052_pdata *pdata;
			int ret;

			gpio = kzalloc(sizeof(*gpio), GFP_KERNEL);
			if (gpio == NULL)
			return -ENOMEM;

			gpio->da9052 = dev_get_drvdata(pdev->dev.parent);
			pdata = gpio->da9052->dev->platform_data;

			gpio->da9052 = dev_get_drvdata(pdev->dev.parent);
			gpio->gp = reference_gp;
			if (pdata && pdata->gpio_base)
			gpio->gp.base = pdata->gpio_base;

			ret = gpiochip_add(&gpio->gp);
			if (ret < 0) {
			dev_err(&pdev->dev, "Could not register gpiochip, %d\n", ret);
			goto err_mem;
			}

			platform_set_drvdata(pdev, gpio);

			return 0;

			err_mem:
			kfree(gpio);
			return ret;
			}

			static int __devexit da9052_gpio_remove(struct platform_device *pdev)
			{
			struct da9052_gpio *gpio = platform_get_drvdata(pdev);
			int ret;

			ret = gpiochip_remove(&gpio->gp);
			if (ret == 0)
			kfree(gpio);

			return ret;
			}

			static struct platform_driver da9052_gpio_driver = {
			.probe = da9052_gpio_probe,
			.remove = __devexit_p(da9052_gpio_remove),
			.driver = {
			.name = "da9052-gpio",
			.owner = THIS_MODULE,
			},
			};

			static int __init da9052_gpio_init(void)
			{
			return platform_driver_register(&da9052_gpio_driver);
			}
			module_init(da9052_gpio_init);

			static void __exit da9052_gpio_exit(void)
			{
			return platform_driver_unregister(&da9052_gpio_driver);
			}
			module_exit(da9052_gpio_exit);

			MODULE_AUTHOR("David Dajun Chen <dchen@diasemi.com>");
			MODULE_DESCRIPTION("DA9052 GPIO Device Driver");
			MODULE_LICENSE("GPL");
			MODULE_ALIAS("platform:da9052-gpio");