1 files changed, 131 insertions, 0 deletions
diff --git a/drivers/gpio/gpio-tps65086.c b/drivers/gpio/gpio-tps65086.c
new file mode 100644
index 000000000..1e9d8262d
--- /dev/null
+++ b/drivers/gpio/gpio-tps65086.c
@@ -0,0 +1,131 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2015 Texas Instruments Incorporated - http://www.ti.com/
+ *	Andrew F. Davis <afd@ti.com>
+ *
+ * Based on the TPS65912 driver
+ */
+
+#include <linux/gpio/driver.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 GPIO_LINE_DIRECTION_OUT;
+}
+
+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 const 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");