Applied "regulator: gpio: Get enable GPIO using GPIO descriptor" to the regulator tree

[Mark Brown <broonie@xxxxxxxxxx>]

The patch

   regulator: gpio: Get enable GPIO using GPIO descriptor

has been applied to the regulator tree at

   https://git.kernel.org/pub/scm/linux/kernel/git/broonie/regulator.git 

All being well this means that it will be integrated into the linux-next
tree (usually sometime in the next 24 hours) and sent to Linus during
the next merge window (or sooner if it is a bug fix), however if
problems are discovered then the patch may be dropped or reverted.  

You may get further e-mails resulting from automated or manual testing
and review of the tree, please engage with people reporting problems and
send followup patches addressing any issues that are reported if needed.

If any updates are required or you are submitting further changes they
should be sent as incremental updates against current git, existing
patches will not be replaced.

Please add any relevant lists and maintainers to the CCs when replying
to this mail.

Thanks,
Mark

>From 37bed97f00734ce329495823d9682181028b51e4 Mon Sep 17 00:00:00 2001
From: Linus Walleij <linus.walleij@xxxxxxxxxx>
Date: Mon, 14 May 2018 10:06:23 +0200
Subject: [PATCH] regulator: gpio: Get enable GPIO using GPIO descriptor

We augment the GPIO regulator to get the *enable* regulator
GPIO line (not the other lines) using a descriptor rather than
a global number.

We then pass this into the regulator core which has been
prepared to hande enable descriptors in a separate patch.

Switch over the two boardfiles using this facility and clean
up so we only pass descriptors around.

Cc: Philipp Zabel <philipp.zabel@xxxxxxxxx> # HX4700/Magician maintainer
Signed-off-by: Linus Walleij <linus.walleij@xxxxxxxxxx>
Signed-off-by: Mark Brown <broonie@xxxxxxxxxx>
---
 arch/arm/mach-pxa/hx4700.c               | 12 +++++++++++-
 arch/arm/mach-pxa/magician.c             | 11 ++++++++++-
 drivers/regulator/gpio-regulator.c       | 23 +++++++++++------------
 include/linux/regulator/gpio-regulator.h |  3 ---
 4 files changed, 32 insertions(+), 17 deletions(-)

diff --git a/arch/arm/mach-pxa/hx4700.c b/arch/arm/mach-pxa/hx4700.c
index e2e7f247a645..6717a10180eb 100644
--- a/arch/arm/mach-pxa/hx4700.c
+++ b/arch/arm/mach-pxa/hx4700.c
@@ -20,6 +20,7 @@
 #include <linux/delay.h>
 #include <linux/fb.h>
 #include <linux/gpio.h>
+#include <linux/gpio/machine.h>
 #include <linux/gpio_keys.h>
 #include <linux/input.h>
 #include <linux/input/navpoint.h>
@@ -711,7 +712,6 @@ static struct gpio_regulator_state bq24022_states[] = {
 static struct gpio_regulator_config bq24022_info = {
 	.supply_name = "bq24022",
 
-	.enable_gpio = GPIO72_HX4700_BQ24022_nCHARGE_EN,
 	.enable_high = 0,
 	.enabled_at_boot = 0,
 
@@ -733,6 +733,15 @@ static struct platform_device bq24022 = {
 	},
 };
 
+static struct gpiod_lookup_table bq24022_gpiod_table = {
+	.dev_id = "gpio-regulator",
+	.table = {
+		GPIO_LOOKUP("gpio-pxa", GPIO72_HX4700_BQ24022_nCHARGE_EN,
+			    "enable", GPIO_ACTIVE_HIGH),
+		{ },
+	},
+};
+
 /*
  * StrataFlash
  */
@@ -875,6 +884,7 @@ static void __init hx4700_init(void)
 	pxa_set_btuart_info(NULL);
 	pxa_set_stuart_info(NULL);
 
+	gpiod_add_lookup_table(&bq24022_gpiod_table);
 	platform_add_devices(devices, ARRAY_SIZE(devices));
 	pwm_add_table(hx4700_pwm_lookup, ARRAY_SIZE(hx4700_pwm_lookup));
 
diff --git a/arch/arm/mach-pxa/magician.c b/arch/arm/mach-pxa/magician.c
index 14c0f80bc9e7..9a5bda3ea194 100644
--- a/arch/arm/mach-pxa/magician.c
+++ b/arch/arm/mach-pxa/magician.c
@@ -657,7 +657,6 @@ static struct gpio_regulator_state bq24022_states[] = {
 static struct gpio_regulator_config bq24022_info = {
 	.supply_name		= "bq24022",
 
-	.enable_gpio		= GPIO30_MAGICIAN_BQ24022_nCHARGE_EN,
 	.enable_high		= 0,
 	.enabled_at_boot	= 1,
 
@@ -679,6 +678,15 @@ static struct platform_device bq24022 = {
 	},
 };
 
+static struct gpiod_lookup_table bq24022_gpiod_table = {
+	.dev_id = "gpio-regulator",
+	.table = {
+		GPIO_LOOKUP("gpio-pxa", GPIO30_MAGICIAN_BQ24022_nCHARGE_EN,
+			    "enable", GPIO_ACTIVE_HIGH),
+		{ },
+	},
+};
+
 /*
  * fixed regulator for ads7846
  */
@@ -1007,6 +1015,7 @@ static void __init magician_init(void)
 	regulator_register_always_on(0, "power", pwm_backlight_supply,
 		ARRAY_SIZE(pwm_backlight_supply), 5000000);
 
+	gpiod_add_lookup_table(&bq24022_gpiod_table);
 	platform_add_devices(ARRAY_AND_SIZE(devices));
 }
 
diff --git a/drivers/regulator/gpio-regulator.c b/drivers/regulator/gpio-regulator.c
index a86b8997bb54..9d6094c4d71c 100644
--- a/drivers/regulator/gpio-regulator.c
+++ b/drivers/regulator/gpio-regulator.c
@@ -31,6 +31,7 @@
 #include <linux/regulator/of_regulator.h>
 #include <linux/regulator/gpio-regulator.h>
 #include <linux/gpio.h>
+#include <linux/gpio/consumer.h>
 #include <linux/slab.h>
 #include <linux/of.h>
 #include <linux/of_gpio.h>
@@ -161,10 +162,6 @@ of_get_gpio_regulator_config(struct device *dev, struct device_node *np,
 
 	of_property_read_u32(np, "startup-delay-us", &config->startup_delay);
 
-	config->enable_gpio = of_get_named_gpio(np, "enable-gpio", 0);
-	if (config->enable_gpio < 0 && config->enable_gpio != -ENOENT)
-		return ERR_PTR(config->enable_gpio);
-
 	/* Fetch GPIOs. - optional property*/
 	ret = of_gpio_count(np);
 	if ((ret < 0) && (ret != -ENOENT))
@@ -255,6 +252,7 @@ static int gpio_regulator_probe(struct platform_device *pdev)
 	struct device_node *np = pdev->dev.of_node;
 	struct gpio_regulator_data *drvdata;
 	struct regulator_config cfg = { };
+	enum gpiod_flags gflags;
 	int ptr, ret, state;
 
 	drvdata = devm_kzalloc(&pdev->dev, sizeof(struct gpio_regulator_data),
@@ -340,21 +338,22 @@ static int gpio_regulator_probe(struct platform_device *pdev)
 	cfg.driver_data = drvdata;
 	cfg.of_node = np;
 
-	if (gpio_is_valid(config->enable_gpio)) {
-		cfg.ena_gpio = config->enable_gpio;
-		cfg.ena_gpio_initialized = true;
-	}
 	cfg.ena_gpio_invert = !config->enable_high;
 	if (config->enabled_at_boot) {
 		if (config->enable_high)
-			cfg.ena_gpio_flags |= GPIOF_OUT_INIT_HIGH;
+			gflags = GPIOD_OUT_HIGH;
 		else
-			cfg.ena_gpio_flags |= GPIOF_OUT_INIT_LOW;
+			gflags = GPIOD_OUT_LOW;
 	} else {
 		if (config->enable_high)
-			cfg.ena_gpio_flags |= GPIOF_OUT_INIT_LOW;
+			gflags = GPIOD_OUT_LOW;
 		else
-			cfg.ena_gpio_flags |= GPIOF_OUT_INIT_HIGH;
+			gflags = GPIOD_OUT_HIGH;
+	}
+	cfg.ena_gpiod = devm_gpiod_get_optional(&pdev->dev, "enable", gflags);
+	if (IS_ERR(cfg.ena_gpiod)) {
+		ret = PTR_ERR(cfg.ena_gpiod);
+		goto err_stategpio;
 	}
 
 	drvdata->dev = regulator_register(&drvdata->desc, &cfg);
diff --git a/include/linux/regulator/gpio-regulator.h b/include/linux/regulator/gpio-regulator.h
index 19fbd267406d..536cab86f2d5 100644
--- a/include/linux/regulator/gpio-regulator.h
+++ b/include/linux/regulator/gpio-regulator.h
@@ -44,8 +44,6 @@ struct gpio_regulator_state {
 /**
  * struct gpio_regulator_config - config structure
  * @supply_name:	Name of the regulator supply
- * @enable_gpio:	GPIO to use for enable control
- *			set to -EINVAL if not used
  * @enable_high:	Polarity of enable GPIO
  *			1 = Active high, 0 = Active low
  * @enabled_at_boot:	Whether regulator has been enabled at
@@ -69,7 +67,6 @@ struct gpio_regulator_state {
 struct gpio_regulator_config {
 	const char *supply_name;
 
-	int enable_gpio;
 	unsigned enable_high:1;
 	unsigned enabled_at_boot:1;
 	unsigned startup_delay;
-- 
2.17.0

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