[PATCH v2 6/6] gpio: tps65086: Add GPIO driver for the TPS65086 PMIC

Andrew F. Davis
2015-10-30T22:43:46Z

Add support for the TPS65086 PMIC GPOs.

TPS65086 has four configurable GPOs that can be used for several
purposes.

Signed-off-by: Andrew F. Davis <afd@ti.com>
---
drivers/gpio/Kconfig | 6 +++
drivers/gpio/Makefile | 1 +
drivers/gpio/gpio-tps65086.c | 115 +++++++++++++++++++++++++++++++++++++++++++
3 files changed, 122 insertions(+)
create mode 100644 drivers/gpio/gpio-tps65086.c

diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig
index b4fc9e4..ccb7e0d 100644
--- a/drivers/gpio/Kconfig
+++ b/drivers/gpio/Kconfig
@@ -824,6 +824,12 @@ config GPIO_TIMBERDALE
---help---
Add support for the GPIO IP in the timberdale FPGA.

+config GPIO_TPS65086
+ tristate "TI TPS65086 GPO"
+ depends on MFD_TPS65086
+ help
+ This driver supports the GPO on TI TPS65086x PMICs.
+
config GPIO_TPS6586X
bool "TPS6586X GPIO"
depends on MFD_TPS6586X
diff --git a/drivers/gpio/Makefile b/drivers/gpio/Makefile
index f79a7c4..2611c7e 100644
--- a/drivers/gpio/Makefile
+++ b/drivers/gpio/Makefile
@@ -94,6 +94,7 @@ obj-$(CONFIG_GPIO_TC3589X) += gpio-tc3589x.o
obj-$(CONFIG_ARCH_TEGRA) += gpio-tegra.o
obj-$(CONFIG_GPIO_TIMBERDALE) += gpio-timberdale.o
obj-$(CONFIG_GPIO_PALMAS) += gpio-palmas.o
+obj-$(CONFIG_GPIO_TPS65086) += gpio-tps65086.o
obj-$(CONFIG_GPIO_TPS6586X) += gpio-tps6586x.o
obj-$(CONFIG_GPIO_TPS65910) += gpio-tps65910.o
obj-$(CONFIG_GPIO_TPS65912) += gpio-tps65912.o
diff --git a/drivers/gpio/gpio-tps65086.c b/drivers/gpio/gpio-tps65086.c
new file mode 100644
index 0000000..ef7a418
--- /dev/null
+++ b/drivers/gpio/gpio-tps65086.c
@@ -0,0 +1,115 @@
+/*
+ * 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 TPS65912 driver
+ */
+
+#include <linux/gpio.h>
+#include <linux/module.h>
+#include <linux/of_device.h>
+#include <linux/platform_device.h>
+
+#include <linux/mfd/tps65086.h>
+
+struct tps65086_gpio {
+ struct gpio_chip gpio_chip;
+ struct tps65086 *tps;
+};
+
+static inline struct tps65086_gpio *to_tps65086_gpio(struct gpio_chip *chip)
+{
+ return container_of(chip, struct tps65086_gpio, gpio_chip);
+}
+
+static int tps65086_gpio_get(struct gpio_chip *gc, unsigned offset)
+{
+ struct tps65086_gpio *gpio = to_tps65086_gpio(gc);
+ int ret, val;
+
+ ret = regmap_read(gpio->tps->regmap, TPS65086_GPOCTRL, &val);
+ if (ret < 0)
+ return ret;
+
+ return val & BIT(4 + offset);
+}
+
+static void tps65086_gpio_set(struct gpio_chip *gc, unsigned offset,
+ int value)
+{
+ struct tps65086_gpio *gpio = to_tps65086_gpio(gc);
+
+ regmap_update_bits(gpio->tps->regmap, TPS65086_GPOCTRL,
+ BIT(4 + offset), value ? BIT(4 + offset) : 0);
+}
+
+static struct gpio_chip template_chip = {
+ .label = "tps65086-gpio",
+ .owner = THIS_MODULE,
+ .get = tps65086_gpio_get,
+ .set = tps65086_gpio_set,
+ .can_sleep = true,
+ .ngpio = 4,
+ .base = -1,
+};
+
+static int tps65086_gpio_probe(struct platform_device *pdev)
+{
+ struct tps65086_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;
+ 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 tps65086_gpio_remove(struct platform_device *pdev)
+{
+ struct tps65086_gpio *gpio = platform_get_drvdata(pdev);
+
+ gpiochip_remove(&gpio->gpio_chip);
+
+ return 0;
+}
+
+static const struct platform_device_id tps65086_gpio_id_table[] = {
+ { "tps65912-regulator", },
+ { /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(platform, tps65086_gpio_id_table);
+
+static struct platform_driver tps65086_gpio_driver = {
+ .driver = {
+ .name = "tps65086-gpio",
+ },
+ .probe = tps65086_gpio_probe,
+ .remove = tps65086_gpio_remove,
+ .id_table = tps65086_gpio_id_table,
+};
+module_platform_driver(tps65086_gpio_driver);
+
+MODULE_AUTHOR("Andrew F. Davis <afd@ti.com>");
+MODULE_DESCRIPTION("TPS65086 GPIO driver");
+MODULE_LICENSE("GPL v2");
--
1.9.1