gpio: tps65086: Add GPO driver for the TPS65086 PMIC
authorAndrew F. Davis <afd@ti.com>
Sat, 6 Feb 2016 16:12:10 +0000 (10:12 -0600)
committerLee Jones <lee.jones@linaro.org>
Wed, 16 Mar 2016 08:50:33 +0000 (08:50 +0000)
Add support for the TPS65086 PMIC GPOs.

TPS65086 has four configurable GPOs that can be used for several
purposes. These are output only.

Signed-off-by: Andrew F. Davis <afd@ti.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
drivers/gpio/Kconfig
drivers/gpio/Makefile
drivers/gpio/gpio-tps65086.c [new file with mode: 0644]

index 3d60b742e42c28f994a1b96e9354384e67ab81d0..2b80903965d10c4ce83b61e0391bd70ad6581cc5 100644 (file)
@@ -844,6 +844,12 @@ 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
index ece7d7cbdc8059c507540839a9e793b24b39532b..c759190b73fa2c76612f399aeb36b985a75494dc 100644 (file)
@@ -95,6 +95,7 @@ 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 (file)
index 0000000..8e25f01
--- /dev/null
@@ -0,0 +1,139 @@
+/*
+ * 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 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/platform_device.h>
+
+#include <linux/mfd/tps65086.h>
+
+struct tps65086_gpio {
+       struct gpio_chip chip;
+       struct tps65086 *tps;
+};
+
+static int tps65086_gpio_get_direction(struct gpio_chip *chip,
+                                      unsigned offset)
+{
+       /* This device is output only */
+       return 0;
+}
+
+static int tps65086_gpio_direction_input(struct gpio_chip *chip,
+                                        unsigned offset)
+{
+       /* This device is output only */
+       return -EINVAL;
+}
+
+static int tps65086_gpio_direction_output(struct gpio_chip *chip,
+                                         unsigned offset, int value)
+{
+       struct tps65086_gpio *gpio = gpiochip_get_data(chip);
+
+       /* Set the initial value */
+       regmap_update_bits(gpio->tps->regmap, TPS65086_GPOCTRL,
+                          BIT(4 + offset), value ? BIT(4 + offset) : 0);
+
+       return 0;
+}
+
+static int tps65086_gpio_get(struct gpio_chip *chip, unsigned offset)
+{
+       struct tps65086_gpio *gpio = gpiochip_get_data(chip);
+       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 *chip, unsigned offset,
+                             int value)
+{
+       struct tps65086_gpio *gpio = gpiochip_get_data(chip);
+
+       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_direction          = tps65086_gpio_get_direction,
+       .direction_input        = tps65086_gpio_direction_input,
+       .direction_output       = tps65086_gpio_direction_output,
+       .get                    = tps65086_gpio_get,
+       .set                    = tps65086_gpio_set,
+       .base                   = -1,
+       .ngpio                  = 4,
+       .can_sleep              = true,
+};
+
+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;
+
+       platform_set_drvdata(pdev, gpio);
+
+       gpio->tps = dev_get_drvdata(pdev->dev.parent);
+       gpio->chip = template_chip;
+       gpio->chip.parent = gpio->tps->dev;
+
+       ret = gpiochip_add_data(&gpio->chip, gpio);
+       if (ret < 0) {
+               dev_err(&pdev->dev, "Could not register gpiochip, %d\n", ret);
+               return ret;
+       }
+
+       return 0;
+}
+
+static int tps65086_gpio_remove(struct platform_device *pdev)
+{
+       struct tps65086_gpio *gpio = platform_get_drvdata(pdev);
+
+       gpiochip_remove(&gpio->chip);
+
+       return 0;
+}
+
+static const struct platform_device_id tps65086_gpio_id_table[] = {
+       { "tps65086-gpio", },
+       { /* 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");