[PATCH v3 4/7] gpio: tps6594x: add GPIO support for TPS6594x PMIC
Matt Ranostay
mranostay at ti.com
Tue Nov 8 22:55:43 PST 2022
Add support for TPS6594X PMICs GPIO interface that has 11 that can be
configured as input or outputs.
Tested-by: Keerthy <j-keerthy at ti.com>
Signed-off-by: Matt Ranostay <mranostay at ti.com>
---
drivers/gpio/Kconfig | 7 ++
drivers/gpio/Makefile | 1 +
drivers/gpio/gpio-tps6594x.c | 142 +++++++++++++++++++++++++++++++++++
include/linux/mfd/tps6594x.h | 6 ++
4 files changed, 156 insertions(+)
create mode 100644 drivers/gpio/gpio-tps6594x.c
diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig
index 8c756cb29214..0225e6bddf0a 100644
--- a/drivers/gpio/Kconfig
+++ b/drivers/gpio/Kconfig
@@ -1405,6 +1405,13 @@ config GPIO_TPS65912
help
This driver supports TPS65912 GPIO chip.
+config GPIO_TPS6594X
+ tristate "TI TPS6594X GPIO driver"
+ depends on MFD_TPS6594X
+ help
+ Select this option to enable GPIO driver for the TPS6954X
+ PMIC chip family. There are 11 GPIOs that can be configured.
+
config GPIO_TPS68470
tristate "TPS68470 GPIO"
depends on INTEL_SKL_INT3472
diff --git a/drivers/gpio/Makefile b/drivers/gpio/Makefile
index 8629e9eaf79e..e67a9b787b09 100644
--- a/drivers/gpio/Makefile
+++ b/drivers/gpio/Makefile
@@ -158,6 +158,7 @@ obj-$(CONFIG_GPIO_TPS65218) += gpio-tps65218.o
obj-$(CONFIG_GPIO_TPS6586X) += gpio-tps6586x.o
obj-$(CONFIG_GPIO_TPS65910) += gpio-tps65910.o
obj-$(CONFIG_GPIO_TPS65912) += gpio-tps65912.o
+obj-$(CONFIG_GPIO_TPS6594X) += gpio-tps6594x.o
obj-$(CONFIG_GPIO_TPS68470) += gpio-tps68470.o
obj-$(CONFIG_GPIO_TQMX86) += gpio-tqmx86.o
obj-$(CONFIG_GPIO_TS4800) += gpio-ts4800.o
diff --git a/drivers/gpio/gpio-tps6594x.c b/drivers/gpio/gpio-tps6594x.c
new file mode 100644
index 000000000000..f530ac17f73f
--- /dev/null
+++ b/drivers/gpio/gpio-tps6594x.c
@@ -0,0 +1,142 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * GPIO driver for TI TPS6594x PMICs
+ *
+ * Copyright (C) 2022 Texas Instruments Incorporated - http://www.ti.com/
+ */
+
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/platform_device.h>
+#include <linux/regmap.h>
+
+#include <linux/gpio/driver.h>
+#include <linux/mfd/tps6594x.h>
+
+#define GPIO_CFG_MASK BIT(0)
+#define NGPIOS_PER_REG 8
+
+struct tps6594x_gpio {
+ struct gpio_chip gpio_chip;
+ struct tps6594x *tps;
+};
+
+static int tps6594x_gpio_get_direction(struct gpio_chip *gc, unsigned int offset)
+{
+ struct tps6594x_gpio *gpio = gpiochip_get_data(gc);
+ int ret, val;
+
+ ret = regmap_read(gpio->tps->regmap, TPS6594X_GPIO1_CONF + offset, &val);
+ if (ret)
+ return ret;
+
+ if (val & GPIO_CFG_MASK)
+ return GPIO_LINE_DIRECTION_OUT;
+
+ return GPIO_LINE_DIRECTION_IN;
+}
+
+static int tps6594x_gpio_direction_input(struct gpio_chip *gc, unsigned int offset)
+{
+ struct tps6594x_gpio *gpio = gpiochip_get_data(gc);
+
+ return regmap_update_bits(gpio->tps->regmap, TPS6594X_GPIO1_CONF + offset,
+ GPIO_CFG_MASK, 0);
+}
+
+static int tps6594x_gpio_direction_output(struct gpio_chip *gc, unsigned int offset, int value)
+{
+ struct tps6594x_gpio *gpio = gpiochip_get_data(gc);
+ unsigned int reg = TPS6594X_GPIO_OUT_1, shift = offset;
+
+ if (shift >= NGPIOS_PER_REG) {
+ reg = TPS6594X_GPIO_OUT_2;
+ shift -= NGPIOS_PER_REG;
+ }
+
+ regmap_update_bits(gpio->tps->regmap, reg, BIT(shift), value ? BIT(shift) : 0);
+
+ return regmap_update_bits(gpio->tps->regmap, TPS6594X_GPIO1_CONF + offset,
+ GPIO_CFG_MASK, GPIO_CFG_MASK);
+}
+
+static int tps6594x_gpio_get(struct gpio_chip *gc, unsigned int offset)
+{
+ struct tps6594x_gpio *gpio = gpiochip_get_data(gc);
+ unsigned int reg = TPS6594X_GPIO_IN_1;
+ int ret, val;
+
+ if (offset >= NGPIOS_PER_REG) {
+ reg = TPS6594X_GPIO_IN_2;
+ offset -= NGPIOS_PER_REG;
+ }
+
+ ret = regmap_read(gpio->tps->regmap, reg, &val);
+ if (ret)
+ return ret;
+
+ return !!(val & BIT(offset));
+}
+
+static void tps6594x_gpio_set(struct gpio_chip *gc, unsigned int offset,
+ int value)
+{
+ struct tps6594x_gpio *gpio = gpiochip_get_data(gc);
+ unsigned int reg = TPS6594X_GPIO_OUT_1;
+
+ if (offset >= NGPIOS_PER_REG) {
+ reg = TPS6594X_GPIO_OUT_2;
+ offset -= NGPIOS_PER_REG;
+ }
+
+ regmap_update_bits(gpio->tps->regmap, reg, BIT(offset), value ? BIT(offset) : 0);
+}
+
+static const struct gpio_chip template_chip = {
+ .label = "tps6594x-gpio",
+ .owner = THIS_MODULE,
+ .get_direction = tps6594x_gpio_get_direction,
+ .direction_input = tps6594x_gpio_direction_input,
+ .direction_output = tps6594x_gpio_direction_output,
+ .get = tps6594x_gpio_get,
+ .set = tps6594x_gpio_set,
+ .base = -1,
+ .ngpio = 11,
+ .can_sleep = true,
+};
+
+static int tps6594x_gpio_probe(struct platform_device *pdev)
+{
+ struct tps6594x *tps = dev_get_drvdata(pdev->dev.parent);
+ struct tps6594x_gpio *gpio;
+
+ 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.parent = tps->dev;
+
+ return devm_gpiochip_add_data(&pdev->dev, &gpio->gpio_chip, gpio);
+}
+
+static const struct of_device_id of_tps6594x_gpio_match[] = {
+ { .compatible = "ti,tps6594x-gpio", },
+ {},
+};
+MODULE_DEVICE_TABLE(of, of_tps6594x_gpio_match);
+
+static struct platform_driver tps6594x_gpio_driver = {
+ .driver = {
+ .name = "tps6594x-gpio",
+ .of_match_table = of_match_ptr(of_tps6594x_gpio_match),
+ },
+ .probe = tps6594x_gpio_probe,
+};
+module_platform_driver(tps6594x_gpio_driver);
+
+MODULE_ALIAS("platform:tps6594x-gpio");
+MODULE_AUTHOR("Matt Ranostay <mranostay at ti.com>");
+MODULE_DESCRIPTION("TPS6594X GPIO driver");
+MODULE_LICENSE("GPL");
diff --git a/include/linux/mfd/tps6594x.h b/include/linux/mfd/tps6594x.h
index 5a6af0da9223..c2440f5f43d3 100644
--- a/include/linux/mfd/tps6594x.h
+++ b/include/linux/mfd/tps6594x.h
@@ -21,6 +21,12 @@
#define TPS6594X_FSM_I2C_TRIGGERS 0x85
#define TPS6594X_FSM_NSLEEP_TRIGGERS 0x86
+#define TPS6594X_GPIO1_CONF 0x31
+#define TPS6594X_GPIO_OUT_1 0x3d
+#define TPS6594X_GPIO_OUT_2 0x3e
+#define TPS6594X_GPIO_IN_1 0x3f
+#define TPS6594X_GPIO_IN_2 0x40
+
#define TPS6594X_RTC_SECONDS 0xb5
#define TPS6594X_RTC_MINUTES 0xb6
#define TPS6594X_RTC_HOURS 0xb7
--
2.38.GIT
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