regulator: s2mps11: Pass descriptor instead of GPIO number

Instead of passing a global GPIO number for the enable GPIO, pass
a descriptor looked up with the standard devm_gpiod_get_optional()
call.

This regulator supports passing platform data, but enable/sleep
regulators are looked up from the device tree exclusively, so
we can need not touch other files.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Reviewed-by: Krzysztof Kozlowski <krzk@kernel.org>
Tested-by: Krzysztof Kozlowski <krzk@kernel.org>
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/drivers/regulator/s2mps11.c b/drivers/regulator/s2mps11.c
index 7726b87..9a1dca2 100644 (file)
--- a/drivers/regulator/s2mps11.c
+++ b/drivers/regulator/s2mps11.c
@@ -18,7 +18,7 @@
 
 #include <linux/bug.h>
 #include <linux/err.h>
-#include <linux/gpio.h>
+#include <linux/gpio/consumer.h>
 #include <linux/slab.h>
 #include <linux/module.h>
 #include <linux/of.h>
@@ -27,7 +27,6 @@
 #include <linux/regulator/driver.h>
 #include <linux/regulator/machine.h>
 #include <linux/regulator/of_regulator.h>
-#include <linux/of_gpio.h>
 #include <linux/mfd/samsung/core.h>
 #include <linux/mfd/samsung/s2mps11.h>
 #include <linux/mfd/samsung/s2mps13.h>
@@ -57,7 +56,7 @@ struct s2mps11_info {
         * Array (size: number of regulators) with GPIO-s for external
         * sleep control.
         */
-       int *ext_control_gpio;
+       struct gpio_desc **ext_control_gpiod;
 };
 
 static int get_ramp_delay(int ramp_delay)
@@ -524,7 +523,7 @@ static int s2mps14_regulator_enable(struct regulator_dev *rdev)
        case S2MPS14X:
                if (test_bit(rdev_get_id(rdev), s2mps11->suspend_state))
                        val = S2MPS14_ENABLE_SUSPEND;
-               else if (gpio_is_valid(s2mps11->ext_control_gpio[rdev_get_id(rdev)]))
+               else if (s2mps11->ext_control_gpiod[rdev_get_id(rdev)])
                        val = S2MPS14_ENABLE_EXT_CONTROL;
                else
                        val = rdev->desc->enable_mask;
@@ -818,7 +817,7 @@ static int s2mps14_pmic_enable_ext_control(struct s2mps11_info *s2mps11,
 static void s2mps14_pmic_dt_parse_ext_control_gpio(struct platform_device *pdev,
                struct of_regulator_match *rdata, struct s2mps11_info *s2mps11)
 {
-       int *gpio = s2mps11->ext_control_gpio;
+       struct gpio_desc **gpio = s2mps11->ext_control_gpiod;
        unsigned int i;
        unsigned int valid_regulators[3] = { S2MPS14_LDO10, S2MPS14_LDO11,
                S2MPS14_LDO12 };
@@ -829,11 +828,20 @@ static void s2mps14_pmic_dt_parse_ext_control_gpio(struct platform_device *pdev,
                if (!rdata[reg].init_data || !rdata[reg].of_node)
                        continue;
 
-               gpio[reg] = of_get_named_gpio(rdata[reg].of_node,
-                               "samsung,ext-control-gpios", 0);
-               if (gpio_is_valid(gpio[reg]))
-                       dev_dbg(&pdev->dev, "Using GPIO %d for ext-control over %d/%s\n",
-                                       gpio[reg], reg, rdata[reg].name);
+               gpio[reg] = devm_gpiod_get_from_of_node(&pdev->dev,
+                                                       rdata[reg].of_node,
+                                                       "samsung,ext-control-gpios",
+                                                       0,
+                                                       GPIOD_OUT_HIGH,
+                                                       "s2mps11-LDO");
+               if (IS_ERR(gpio[reg])) {
+                       dev_err(&pdev->dev, "Failed to get control GPIO for %d/%s\n",
+                               reg, rdata[reg].name);
+                       continue;
+               }
+               if (gpio[reg])
+                       dev_dbg(&pdev->dev, "Using GPIO for ext-control over %d/%s\n",
+                               reg, rdata[reg].name);
        }
 }
 
@@ -1139,17 +1147,11 @@ static int s2mps11_pmic_probe(struct platform_device *pdev)
                return -EINVAL;
        }
 
-       s2mps11->ext_control_gpio = devm_kmalloc(&pdev->dev,
-                       sizeof(*s2mps11->ext_control_gpio) * rdev_num,
+       s2mps11->ext_control_gpiod = devm_kmalloc(&pdev->dev,
+                       sizeof(*s2mps11->ext_control_gpiod) * rdev_num,
                        GFP_KERNEL);
-       if (!s2mps11->ext_control_gpio)
+       if (!s2mps11->ext_control_gpiod)
                return -ENOMEM;
-       /*
-        * 0 is a valid GPIO so initialize all GPIO-s to negative value
-        * to indicate that external control won't be used for this regulator.
-        */
-       for (i = 0; i < rdev_num; i++)
-               s2mps11->ext_control_gpio[i] = -EINVAL;
 
        if (!iodev->dev->of_node) {
                if (iodev->pdata) {
@@ -1179,8 +1181,6 @@ common_reg:
        config.dev = &pdev->dev;
        config.regmap = iodev->regmap_pmic;
        config.driver_data = s2mps11;
-       config.ena_gpio_flags = GPIOF_OUT_INIT_HIGH;
-       config.ena_gpio_initialized = true;
        for (i = 0; i < rdev_num; i++) {
                struct regulator_dev *regulator;
 
@@ -1191,7 +1191,7 @@ common_reg:
                        config.init_data = rdata[i].init_data;
                        config.of_node = rdata[i].of_node;
                }
-               config.ena_gpio = s2mps11->ext_control_gpio[i];
+               config.ena_gpiod = s2mps11->ext_control_gpiod[i];
 
                regulator = devm_regulator_register(&pdev->dev,
                                                &regulators[i], &config);
@@ -1202,7 +1202,7 @@ common_reg:
                        goto out;
                }
 
-               if (gpio_is_valid(s2mps11->ext_control_gpio[i])) {
+               if (s2mps11->ext_control_gpiod[i]) {
                        ret = s2mps14_pmic_enable_ext_control(s2mps11,
                                        regulator);
                        if (ret < 0) {