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Date: Fri, 16 Oct 2015 11:59:13 -0500
From: "Andrew F. Davis" <afd@...com>
To: Rob Herring <robh+dt@...nel.org>, Pawel Moll <pawel.moll@....com>,
Mark Rutland <mark.rutland@....com>,
Ian Campbell <ijc+devicetree@...lion.org.uk>,
Kumar Gala <galak@...eaurora.org>,
Lee Jones <lee.jones@...aro.org>,
Mark Brown <broonie@...nel.org>,
Alexandre Courbot <gnurou@...il.com>,
Grygorii Strashko <grygorii.strashko@...com>
CC: <linux-gpio@...r.kernel.org>, <devicetree@...r.kernel.org>,
<linux-kernel@...r.kernel.org>, "Andrew F. Davis" <afd@...com>
Subject: [PATCH 4/4] gpio: tps65086: Add GPIO driver for the TPS65086 PMIC
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@...com>
---
drivers/gpio/Kconfig | 6 +++
drivers/gpio/Makefile | 1 +
drivers/gpio/gpio-tps65086.c | 114 +++++++++++++++++++++++++++++++++++++++++++
3 files changed, 121 insertions(+)
create mode 100644 drivers/gpio/gpio-tps65086.c
diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig
index b4fc9e4..c585d42 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 the TI TPS65086 PMIC.
+
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..9fba758
--- /dev/null
+++ b/drivers/gpio/gpio-tps65086.c
@@ -0,0 +1,114 @@
+/*
+ * TI TPS65086x GPIO Driver
+ *
+ * Copyright (C) 2015 Texas Instruments Incorporated - http://www.ti.com/
+ *
+ * Author: Andrew F. Davis <afd@...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/mfd/tps65086.h>
+
+struct tps65086_gpio {
+ struct gpio_chip gpio_chip;
+ struct tps65086 *tps;
+};
+
+#define to_tps65086_gpio(gc) container_of(gc, 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 of_device_id tps65086_gpio_of_match_table[] = {
+ { .compatible = "ti,tps65086-gpio", },
+ { /* sentinel */ },
+};
+MODULE_DEVICE_TABLE(of, tps65086_gpio_of_match_table);
+
+static struct platform_driver tps65086_gpio_driver = {
+ .driver = {
+ .name = "tps65086-gpio",
+ .of_match_table = tps65086_gpio_of_match_table,
+ },
+ .probe = tps65086_gpio_probe,
+ .remove = tps65086_gpio_remove,
+};
+
+module_platform_driver(tps65086_gpio_driver);
+
+MODULE_AUTHOR("Andrew F. Davis <afd@...com>");
+MODULE_DESCRIPTION("TPS65086 GPIO driver");
+MODULE_LICENSE("GPL v2");
--
1.9.1
--
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