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Subject[PATCH v7 5/5] gpio: tps65912: Add GPIO driver for the TPS65912 PMIC
Date
This patch adds support for the TPS65912 PMIC GPIOs.

TPS65912 has five configurable GPIOs that can be used for several
purposes.

Signed-off-by: Andrew F. Davis <afd@ti.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
---
drivers/gpio/Kconfig | 6 ++
drivers/gpio/Makefile | 1 +
drivers/gpio/gpio-tps65912.c | 164 +++++++++++++++++++++++++++++++++++++++++++
3 files changed, 171 insertions(+)
create mode 100644 drivers/gpio/gpio-tps65912.c

diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig
index 131a89b..a5fab31 100644
--- a/drivers/gpio/Kconfig
+++ b/drivers/gpio/Kconfig
@@ -852,6 +852,12 @@ config GPIO_TPS65910
Select this option to enable GPIO driver for the TPS65910
chip family.

+config GPIO_TPS65912
+ tristate "TI TPS65912 GPIO"
+ depends on MFD_TPS65912
+ help
+ This driver supports TPS65912 gpio chip
+
config GPIO_TWL4030
tristate "TWL4030, TWL5030, and TPS659x0 GPIOs"
depends on TWL4030_CORE
diff --git a/drivers/gpio/Makefile b/drivers/gpio/Makefile
index f13b59f..986dbd8 100644
--- a/drivers/gpio/Makefile
+++ b/drivers/gpio/Makefile
@@ -97,6 +97,7 @@ obj-$(CONFIG_GPIO_TIMBERDALE) += gpio-timberdale.o
obj-$(CONFIG_GPIO_PALMAS) += gpio-palmas.o
obj-$(CONFIG_GPIO_TPS6586X) += gpio-tps6586x.o
obj-$(CONFIG_GPIO_TPS65910) += gpio-tps65910.o
+obj-$(CONFIG_GPIO_TPS65912) += gpio-tps65912.o
obj-$(CONFIG_GPIO_TS5500) += gpio-ts5500.o
obj-$(CONFIG_GPIO_TWL4030) += gpio-twl4030.o
obj-$(CONFIG_GPIO_TWL6040) += gpio-twl6040.o
diff --git a/drivers/gpio/gpio-tps65912.c b/drivers/gpio/gpio-tps65912.c
new file mode 100644
index 0000000..41e1a72
--- /dev/null
+++ b/drivers/gpio/gpio-tps65912.c
@@ -0,0 +1,164 @@
+/*
+ * GPIO driver for TI TPS65912x PMICs
+ *
+ * Copyright (C) 2015 Texas Instruments Incorporated - http://www.ti.com/
+ *
+ * Author: 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 version 2 as
+ * published by the Free Software Foundation.
+ *
+ * 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/gpio.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+
+#include <linux/mfd/tps65912.h>
+
+struct tps65912_gpio {
+ struct gpio_chip gpio_chip;
+ struct tps65912 *tps;
+};
+
+static inline struct tps65912_gpio *to_tps65912_gpio(struct gpio_chip *chip)
+{
+ return container_of(chip, struct tps65912_gpio, gpio_chip);
+}
+
+static int tps65912_gpio_get_direction(struct gpio_chip *gc,
+ unsigned offset)
+{
+ struct tps65912_gpio *gpio = to_tps65912_gpio(gc);
+
+ int ret, val;
+
+ ret = regmap_read(gpio->tps->regmap, TPS65912_GPIO1 + offset, &val);
+ if (ret)
+ return ret;
+
+ if (val & GPIO_CFG_MASK)
+ return GPIOF_DIR_OUT;
+ else
+ return GPIOF_DIR_IN;
+}
+
+static int tps65912_gpio_direction_input(struct gpio_chip *gc, unsigned offset)
+{
+ struct tps65912_gpio *gpio = to_tps65912_gpio(gc);
+
+ return regmap_update_bits(gpio->tps->regmap, TPS65912_GPIO1 + offset,
+ GPIO_CFG_MASK, 0);
+}
+
+static int tps65912_gpio_direction_output(struct gpio_chip *gc,
+ unsigned offset, int value)
+{
+ struct tps65912_gpio *gpio = to_tps65912_gpio(gc);
+
+ /* Set the initial value */
+ regmap_update_bits(gpio->tps->regmap, TPS65912_GPIO1 + offset,
+ GPIO_SET_MASK, value ? GPIO_SET_MASK : 0);
+
+ return regmap_update_bits(gpio->tps->regmap, TPS65912_GPIO1 + offset,
+ GPIO_CFG_MASK, GPIO_CFG_MASK);
+}
+
+static int tps65912_gpio_get(struct gpio_chip *gc, unsigned offset)
+{
+ struct tps65912_gpio *gpio = to_tps65912_gpio(gc);
+ int ret, val;
+
+ ret = regmap_read(gpio->tps->regmap, TPS65912_GPIO1 + offset, &val);
+ if (ret)
+ return ret;
+
+ 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 = to_tps65912_gpio(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-gpio",
+ .owner = THIS_MODULE,
+ .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,
+ .base = -1,
+ .ngpio = 5,
+ .can_sleep = true,
+};
+
+static int tps65912_gpio_probe(struct platform_device *pdev)
+{
+ struct tps65912 *tps = dev_get_drvdata(pdev->dev.parent);
+ struct tps65912_gpio *gpio;
+ int ret;
+
+ gpio = devm_kzalloc(&pdev->dev, sizeof(*gpio), GFP_KERNEL);
+ if (!gpio)
+ return -ENOMEM;
+
+ gpio->tps = dev_get_drvdata(pdev->dev.parent);
+ gpio->gpio_chip = template_chip;
+ gpio->gpio_chip.dev = tps->dev;
+
+ ret = gpiochip_add(&gpio->gpio_chip);
+ if (ret < 0) {
+ dev_err(&pdev->dev, "Could not register gpiochip, %d\n", ret);
+ return ret;
+ }
+
+ platform_set_drvdata(pdev, gpio);
+
+ return 0;
+}
+
+static int tps65912_gpio_remove(struct platform_device *pdev)
+{
+ struct tps65912_gpio *gpio = platform_get_drvdata(pdev);
+
+ gpiochip_remove(&gpio->gpio_chip);
+
+ 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,
+ .remove = tps65912_gpio_remove,
+ .id_table = tps65912_gpio_id_table,
+};
+module_platform_driver(tps65912_gpio_driver);
+
+MODULE_AUTHOR("Andrew F. Davis <afd@ti.com>");
+MODULE_DESCRIPTION("TPS65912 GPIO driver");
+MODULE_LICENSE("GPL v2");
--
1.9.1


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