/*
- * Copyright 2011 Texas Instruments Inc.
+ * GPIO driver for TI TPS65912x PMICs
*
- * Author: Margarita Olaya <magi@slimlogic.co.uk>
+ * Copyright (C) 2015 Texas Instruments Incorporated - http://www.ti.com/
+ * Andrew F. Davis <afd@ti.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.
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
*
- * This driver is based on wm8350 implementation.
+ * This program is distributed "as is" WITHOUT ANY WARRANTY of any
+ * kind, whether expressed or implied; without even the implied warranty
+ * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License version 2 for more details.
+ *
+ * Based on the Arizona GPIO driver and the previous TPS65912 driver by
+ * Margarita Olaya Cabrera <magi@slimlogic.co.uk>
*/
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/errno.h>
#include <linux/gpio.h>
-#include <linux/mfd/core.h>
+#include <linux/module.h>
#include <linux/platform_device.h>
-#include <linux/seq_file.h>
-#include <linux/slab.h>
+
#include <linux/mfd/tps65912.h>
-struct tps65912_gpio_data {
- struct tps65912 *tps65912;
+struct tps65912_gpio {
struct gpio_chip gpio_chip;
+ struct tps65912 *tps;
};
-static int tps65912_gpio_get(struct gpio_chip *gc, unsigned offset)
+static int tps65912_gpio_get_direction(struct gpio_chip *gc,
+ unsigned offset)
{
- struct tps65912_gpio_data *tps65912_gpio = gpiochip_get_data(gc);
- struct tps65912 *tps65912 = tps65912_gpio->tps65912;
- int val;
+ struct tps65912_gpio *gpio = gpiochip_get_data(gc);
- val = tps65912_reg_read(tps65912, TPS65912_GPIO1 + offset);
+ int ret, val;
- if (val & GPIO_STS_MASK)
- return 1;
+ ret = regmap_read(gpio->tps->regmap, TPS65912_GPIO1 + offset, &val);
+ if (ret)
+ return ret;
- return 0;
+ if (val & GPIO_CFG_MASK)
+ return GPIOF_DIR_OUT;
+ else
+ return GPIOF_DIR_IN;
}
-static void tps65912_gpio_set(struct gpio_chip *gc, unsigned offset,
- int value)
+static int tps65912_gpio_direction_input(struct gpio_chip *gc, unsigned offset)
{
- struct tps65912_gpio_data *tps65912_gpio = gpiochip_get_data(gc);
- struct tps65912 *tps65912 = tps65912_gpio->tps65912;
+ struct tps65912_gpio *gpio = gpiochip_get_data(gc);
- if (value)
- tps65912_set_bits(tps65912, TPS65912_GPIO1 + offset,
- GPIO_SET_MASK);
- else
- tps65912_clear_bits(tps65912, TPS65912_GPIO1 + offset,
- GPIO_SET_MASK);
+ return regmap_update_bits(gpio->tps->regmap, TPS65912_GPIO1 + offset,
+ GPIO_CFG_MASK, 0);
}
-static int tps65912_gpio_output(struct gpio_chip *gc, unsigned offset,
- int value)
+static int tps65912_gpio_direction_output(struct gpio_chip *gc,
+ unsigned offset, int value)
{
- struct tps65912_gpio_data *tps65912_gpio = gpiochip_get_data(gc);
- struct tps65912 *tps65912 = tps65912_gpio->tps65912;
+ struct tps65912_gpio *gpio = gpiochip_get_data(gc);
/* Set the initial value */
- tps65912_gpio_set(gc, offset, value);
+ regmap_update_bits(gpio->tps->regmap, TPS65912_GPIO1 + offset,
+ GPIO_SET_MASK, value ? GPIO_SET_MASK : 0);
- return tps65912_set_bits(tps65912, TPS65912_GPIO1 + offset,
- GPIO_CFG_MASK);
+ return regmap_update_bits(gpio->tps->regmap, TPS65912_GPIO1 + offset,
+ GPIO_CFG_MASK, GPIO_CFG_MASK);
}
-static int tps65912_gpio_input(struct gpio_chip *gc, unsigned offset)
+static int tps65912_gpio_get(struct gpio_chip *gc, unsigned offset)
{
- struct tps65912_gpio_data *tps65912_gpio = gpiochip_get_data(gc);
- struct tps65912 *tps65912 = tps65912_gpio->tps65912;
+ struct tps65912_gpio *gpio = gpiochip_get_data(gc);
+ int ret, val;
+
+ ret = regmap_read(gpio->tps->regmap, TPS65912_GPIO1 + offset, &val);
+ if (ret)
+ return ret;
- return tps65912_clear_bits(tps65912, TPS65912_GPIO1 + offset,
- GPIO_CFG_MASK);
+ if (val & GPIO_STS_MASK)
+ return 1;
+
+ return 0;
+}
+
+static void tps65912_gpio_set(struct gpio_chip *gc, unsigned offset,
+ int value)
+{
+ struct tps65912_gpio *gpio = gpiochip_get_data(gc);
+
+ regmap_update_bits(gpio->tps->regmap, TPS65912_GPIO1 + offset,
+ GPIO_SET_MASK, value ? GPIO_SET_MASK : 0);
}
static struct gpio_chip template_chip = {
- .label = "tps65912",
+ .label = "tps65912-gpio",
.owner = THIS_MODULE,
- .direction_input = tps65912_gpio_input,
- .direction_output = tps65912_gpio_output,
+ .get_direction = tps65912_gpio_get_direction,
+ .direction_input = tps65912_gpio_direction_input,
+ .direction_output = tps65912_gpio_direction_output,
.get = tps65912_gpio_get,
.set = tps65912_gpio_set,
- .can_sleep = true,
- .ngpio = 5,
.base = -1,
+ .ngpio = 5,
+ .can_sleep = true,
};
static int tps65912_gpio_probe(struct platform_device *pdev)
{
- struct tps65912 *tps65912 = dev_get_drvdata(pdev->dev.parent);
- struct tps65912_board *pdata = dev_get_platdata(tps65912->dev);
- struct tps65912_gpio_data *tps65912_gpio;
+ struct tps65912 *tps = dev_get_drvdata(pdev->dev.parent);
+ struct tps65912_gpio *gpio;
int ret;
- tps65912_gpio = devm_kzalloc(&pdev->dev, sizeof(*tps65912_gpio),
- GFP_KERNEL);
- if (tps65912_gpio == NULL)
+ gpio = devm_kzalloc(&pdev->dev, sizeof(*gpio), GFP_KERNEL);
+ if (!gpio)
return -ENOMEM;
- tps65912_gpio->tps65912 = tps65912;
- tps65912_gpio->gpio_chip = template_chip;
- tps65912_gpio->gpio_chip.parent = &pdev->dev;
- if (pdata && pdata->gpio_base)
- tps65912_gpio->gpio_chip.base = pdata->gpio_base;
+ gpio->tps = dev_get_drvdata(pdev->dev.parent);
+ gpio->gpio_chip = template_chip;
+ gpio->gpio_chip.parent = tps->dev;
ret = devm_gpiochip_add_data(&pdev->dev, &tps65912_gpio->gpio_chip,
tps65912_gpio);
if (ret < 0) {
- dev_err(&pdev->dev, "Failed to register gpiochip, %d\n", ret);
+ dev_err(&pdev->dev, "Could not register gpiochip, %d\n", ret);
return ret;
}
- platform_set_drvdata(pdev, tps65912_gpio);
+ platform_set_drvdata(pdev, gpio);
- return ret;
+ return 0;
}
+static const struct platform_device_id tps65912_gpio_id_table[] = {
+ { "tps65912-gpio", },
+ { /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(platform, tps65912_gpio_id_table);
+
static struct platform_driver tps65912_gpio_driver = {
.driver = {
.name = "tps65912-gpio",
},
.probe = tps65912_gpio_probe,
+ .id_table = tps65912_gpio_id_table,
};
+module_platform_driver(tps65912_gpio_driver);
-static int __init tps65912_gpio_init(void)
-{
- return platform_driver_register(&tps65912_gpio_driver);
-}
-subsys_initcall(tps65912_gpio_init);
-
-static void __exit tps65912_gpio_exit(void)
-{
- platform_driver_unregister(&tps65912_gpio_driver);
-}
-module_exit(tps65912_gpio_exit);
-
-MODULE_AUTHOR("Margarita Olaya Cabrera <magi@slimlogic.co.uk>");
-MODULE_DESCRIPTION("GPIO interface for TPS65912 PMICs");
+MODULE_AUTHOR("Andrew F. Davis <afd@ti.com>");
+MODULE_DESCRIPTION("TPS65912 GPIO driver");
MODULE_LICENSE("GPL v2");
-MODULE_ALIAS("platform:tps65912-gpio");
projects / linux-2.6-block.git / blobdiff