[PATCH 1/5 v10] regulator: gpio: Convert to use descriptors

[PATCH 1/5 v10] regulator: gpio: Convert to use descriptors

[Linus Walleij]

This converts the GPIO regulator driver to use decriptors only.

We have to let go of the array gpio handling: the fetched descriptors
are handled individually anyway, and the array retrieveal function
does not make it possible to retrieve each GPIO descriptor with
unique flags. Instead get them one by one.

We request the "enable" GPIO separately as before, and make sure
that this line is requested as nonexclusive since enable lines can
be shared and the regulator core expects this.

Most users of the GPIO regulator are using device tree.

There are two boards in the kernel using the gpio regulator from a
non-devicetree path: PXA hx4700 and magician. Make sure to switch
these over to use descriptors as well.

Cc: Philipp Zabel <p.zabel@pengutronix.de> # Magician
Cc: Petr Cvek <petr.cvek@tul.cz> # Magician
Cc: Robert Jarzmik <robert.jarzmik@free.fr> # PXA
Cc: Paul Parsons <lost.distance@yahoo.com> # hx4700
Cc: Kevin Hilman <khilman@baylibre.com> # Meson
Cc: Neil Armstrong <narmstrong@baylibre.com> # Meson
Tested-by: Marek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
---
ChangeLog v9->v10:
- Remove reliance on a syntactic change from a later patch
  in the series: I was using a local dev pointer in .probe()
  that is only introduced in a later clean-up patch.
ChangeLog v8->v9:
- Add a missing allocation.
- Collect Marek's Tested-by.
- Kevin/Neil: would be great if you could test this patch so as
  to make sure I don't break your stuff again!
ChangeLog v7->v8:
- Rebase on v5.0-rc1.
- Do not use devm_* to fetch the enable GPIO, use the regular
  call and hand over lifecycle management to the regulator
  core.
ChangeLog v6->v7:
- Resend with the rest.
ChangeLog v3->v6:
- Make sure to request the GPIO line nonexclusive as with other
  regulator GPIOs.
- Request the voltage controlling GPIOs from the name NULL as
  only "enable-gpio" is explicitly named.
- Make sure to delete all unused struct members and assignments
  in board files.
- Change numbering to fit the rest of the patches.
ChangeLog v2->v3:
- Resending.
ChangeLog v1->v2:
- Rebase the patch on the other changes.
---
 arch/arm/mach-pxa/hx4700.c               |  23 ++--
 arch/arm/mach-pxa/magician.c             |  23 ++--
 drivers/regulator/gpio-regulator.c       | 150 +++++++++--------------
 include/linux/regulator/gpio-regulator.h |  12 +-
 4 files changed, 95 insertions(+), 113 deletions(-)

diff --git a/arch/arm/mach-pxa/hx4700.c b/arch/arm/mach-pxa/hx4700.c
index b79b757fdd41..51d38d5e776a 100644
--- a/arch/arm/mach-pxa/hx4700.c
+++ b/arch/arm/mach-pxa/hx4700.c
@@ -19,6 +19,7 @@
 #include <linux/platform_device.h>
 #include <linux/delay.h>
 #include <linux/fb.h>
+#include <linux/gpio/machine.h>
 #include <linux/gpio.h>
 #include <linux/gpio_keys.h>
 #include <linux/input.h>
@@ -702,9 +703,7 @@ static struct regulator_init_data bq24022_init_data = {
 	.consumer_supplies      = bq24022_consumers,
 };
 
-static struct gpio bq24022_gpios[] = {
-	{ GPIO96_HX4700_BQ24022_ISET2, GPIOF_OUT_INIT_LOW, "bq24022_iset2" },
-};
+static enum gpiod_flags bq24022_gpiod_gflags[] = { GPIOD_OUT_LOW };
 
 static struct gpio_regulator_state bq24022_states[] = {
 	{ .value = 100000, .gpios = (0 << 0) },
@@ -714,12 +713,10 @@ 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,
 
-	.gpios = bq24022_gpios,
-	.nr_gpios = ARRAY_SIZE(bq24022_gpios),
+	.gflags = bq24022_gpiod_gflags,
+	.ngpios = ARRAY_SIZE(bq24022_gpiod_gflags),
 
 	.states = bq24022_states,
 	.nr_states = ARRAY_SIZE(bq24022_states),
@@ -736,6 +733,17 @@ static struct platform_device bq24022 = {
 	},
 };
 
+static struct gpiod_lookup_table bq24022_gpiod_table = {
+	.dev_id = "gpio-regulator",
+	.table = {
+		GPIO_LOOKUP("gpio-pxa", GPIO96_HX4700_BQ24022_ISET2,
+			    NULL, GPIO_ACTIVE_HIGH),
+		GPIO_LOOKUP("gpio-pxa", GPIO72_HX4700_BQ24022_nCHARGE_EN,
+			    "enable", GPIO_ACTIVE_LOW),
+		{ },
+	},
+};
+
 /*
  * StrataFlash
  */
@@ -878,6 +886,7 @@ 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 08b079653c3f..6538a7c0e504 100644
--- a/arch/arm/mach-pxa/magician.c
+++ b/arch/arm/mach-pxa/magician.c
@@ -645,9 +645,8 @@ static struct regulator_init_data bq24022_init_data = {
 	.consumer_supplies	= bq24022_consumers,
 };
 
-static struct gpio bq24022_gpios[] = {
-	{ EGPIO_MAGICIAN_BQ24022_ISET2, GPIOF_OUT_INIT_LOW, "bq24022_iset2" },
-};
+
+static enum gpiod_flags bq24022_gpiod_gflags[] = { GPIOD_OUT_LOW };
 
 static struct gpio_regulator_state bq24022_states[] = {
 	{ .value = 100000, .gpios = (0 << 0) },
@@ -657,12 +656,10 @@ 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,
 
-	.gpios			= bq24022_gpios,
-	.nr_gpios		= ARRAY_SIZE(bq24022_gpios),
+	.gflags = bq24022_gpiod_gflags,
+	.ngpios = ARRAY_SIZE(bq24022_gpiod_gflags),
 
 	.states			= bq24022_states,
 	.nr_states		= ARRAY_SIZE(bq24022_states),
@@ -679,6 +676,17 @@ static struct platform_device bq24022 = {
 	},
 };
 
+static struct gpiod_lookup_table bq24022_gpiod_table = {
+	.dev_id = "gpio-regulator",
+	.table = {
+		GPIO_LOOKUP("gpio-pxa", EGPIO_MAGICIAN_BQ24022_ISET2,
+			    NULL, GPIO_ACTIVE_HIGH),
+		GPIO_LOOKUP("gpio-pxa", GPIO30_MAGICIAN_BQ24022_nCHARGE_EN,
+			    "enable", GPIO_ACTIVE_LOW),
+		{ },
+	},
+};
+
 /*
  * fixed regulator for ads7846
  */
@@ -1027,6 +1035,7 @@ 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 b2f5ec4f658a..07fb41abd4e8 100644
--- a/drivers/regulator/gpio-regulator.c
+++ b/drivers/regulator/gpio-regulator.c
@@ -30,16 +30,15 @@
 #include <linux/regulator/machine.h>
 #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>
 
 struct gpio_regulator_data {
 	struct regulator_desc desc;
 	struct regulator_dev *dev;
 
-	struct gpio *gpios;
+	struct gpio_desc **gpiods;
 	int nr_gpios;
 
 	struct gpio_regulator_state *states;
@@ -82,7 +81,7 @@ static int gpio_regulator_set_voltage(struct regulator_dev *dev,
 
 	for (ptr = 0; ptr < data->nr_gpios; ptr++) {
 		state = (target & (1 << ptr)) >> ptr;
-		gpio_set_value_cansleep(data->gpios[ptr].gpio, state);
+		gpiod_set_value_cansleep(data->gpiods[ptr], state);
 	}
 	data->state = target;
 
@@ -119,7 +118,7 @@ static int gpio_regulator_set_current_limit(struct regulator_dev *dev,
 
 	for (ptr = 0; ptr < data->nr_gpios; ptr++) {
 		state = (target & (1 << ptr)) >> ptr;
-		gpio_set_value_cansleep(data->gpios[ptr].gpio, state);
+		gpiod_set_value_cansleep(data->gpiods[ptr], state);
 	}
 	data->state = target;
 
@@ -138,7 +137,8 @@ of_get_gpio_regulator_config(struct device *dev, struct device_node *np,
 {
 	struct gpio_regulator_config *config;
 	const char *regtype;
-	int proplen, gpio, i;
+	int proplen, i;
+	int ngpios;
 	int ret;
 
 	config = devm_kzalloc(dev,
@@ -153,59 +153,36 @@ of_get_gpio_regulator_config(struct device *dev, struct device_node *np,
 
 	config->supply_name = config->init_data->constraints.name;
 
-	if (of_property_read_bool(np, "enable-active-high"))
-		config->enable_high = true;
-
 	if (of_property_read_bool(np, "enable-at-boot"))
 		config->enabled_at_boot = true;
 
 	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))
-		return ERR_PTR(ret);
-
-	if (ret > 0) {
-		config->nr_gpios = ret;
-		config->gpios = devm_kcalloc(dev,
-					config->nr_gpios, sizeof(struct gpio),
-					GFP_KERNEL);
-		if (!config->gpios)
+	/* Fetch GPIO init levels */
+	ngpios = gpiod_count(dev, NULL);
+	if (ngpios > 0) {
+		config->gflags = devm_kzalloc(dev,
+					      sizeof(enum gpiod_flags)
+					      * ngpios,
+					      GFP_KERNEL);
+		if (!config->gflags)
 			return ERR_PTR(-ENOMEM);
 
-		proplen = of_property_count_u32_elems(np, "gpios-states");
-		/* optional property */
-		if (proplen < 0)
-			proplen = 0;
+		for (i = 0; i < ngpios; i++) {
+			u32 val;
 
-		if (proplen > 0 && proplen != config->nr_gpios) {
-			dev_warn(dev, "gpios <-> gpios-states mismatch\n");
-			proplen = 0;
-		}
+			ret = of_property_read_u32_index(np, "gpios-states", i,
+							 &val);
 
-		for (i = 0; i < config->nr_gpios; i++) {
-			gpio = of_get_named_gpio(np, "gpios", i);
-			if (gpio < 0) {
-				if (gpio != -ENOENT)
-					return ERR_PTR(gpio);
-				break;
-			}
-			config->gpios[i].gpio = gpio;
-			config->gpios[i].label = config->supply_name;
-			if (proplen > 0) {
-				of_property_read_u32_index(np, "gpios-states",
-							   i, &ret);
-				if (ret)
-					config->gpios[i].flags =
-							   GPIOF_OUT_INIT_HIGH;
-			}
+			/* Default to high per specification */
+			if (ret)
+				config->gflags[i] = GPIOD_OUT_HIGH;
+			else
+				config->gflags[i] =
+					val ? GPIOD_OUT_HIGH : GPIOD_OUT_LOW;
 		}
 	}
+	config->ngpios = ngpios;
 
 	/* Fetch states. */
 	proplen = of_property_count_u32_elems(np, "states");
@@ -255,7 +232,8 @@ 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 = { };
-	int ptr, ret, state;
+	enum gpiod_flags gflags;
+	int ptr, ret, state, i;
 
 	drvdata = devm_kzalloc(&pdev->dev, sizeof(struct gpio_regulator_data),
 			       GFP_KERNEL);
@@ -275,26 +253,21 @@ static int gpio_regulator_probe(struct platform_device *pdev)
 		return -ENOMEM;
 	}
 
-	if (config->nr_gpios != 0) {
-		drvdata->gpios = kmemdup(config->gpios,
-					 config->nr_gpios * sizeof(struct gpio),
-					 GFP_KERNEL);
-		if (drvdata->gpios == NULL) {
-			dev_err(&pdev->dev, "Failed to allocate gpio data\n");
-			ret = -ENOMEM;
-			goto err_name;
-		}
-
-		drvdata->nr_gpios = config->nr_gpios;
-		ret = gpio_request_array(drvdata->gpios, drvdata->nr_gpios);
-		if (ret) {
-			if (ret != -EPROBE_DEFER)
-				dev_err(&pdev->dev,
-					"Could not obtain regulator setting GPIOs: %d\n",
-					ret);
-			goto err_memgpio;
-		}
+	drvdata->gpiods = devm_kzalloc(&pdev->dev, sizeof(struct gpio_desc *),
+				       GFP_KERNEL);
+	if (!drvdata->gpiods)
+		return -ENOMEM;
+	for (i = 0; i < config->ngpios; i++) {
+		drvdata->gpiods[i] = devm_gpiod_get_index(&pdev->dev,
+							  NULL,
+							  i,
+							  config->gflags[i]);
+		if (IS_ERR(drvdata->gpiods[i]))
+			return PTR_ERR(drvdata->gpiods[i]);
+		/* This is good to know */
+		gpiod_set_consumer_name(drvdata->gpiods[i], drvdata->desc.name);
 	}
+	drvdata->nr_gpios = config->ngpios;
 
 	drvdata->states = kmemdup(config->states,
 				  config->nr_states *
@@ -303,7 +276,7 @@ static int gpio_regulator_probe(struct platform_device *pdev)
 	if (drvdata->states == NULL) {
 		dev_err(&pdev->dev, "Failed to allocate state data\n");
 		ret = -ENOMEM;
-		goto err_stategpio;
+		goto err_name;
 	}
 	drvdata->nr_states = config->nr_states;
 
@@ -330,7 +303,7 @@ static int gpio_regulator_probe(struct platform_device *pdev)
 	/* build initial state from gpio init data. */
 	state = 0;
 	for (ptr = 0; ptr < drvdata->nr_gpios; ptr++) {
-		if (config->gpios[ptr].flags & GPIOF_OUT_INIT_HIGH)
+		if (config->gflags[ptr] == GPIOD_OUT_HIGH)
 			state |= (1 << ptr);
 	}
 	drvdata->state = state;
@@ -340,21 +313,19 @@ 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;
-		else
-			cfg.ena_gpio_flags |= GPIOF_OUT_INIT_LOW;
-	} else {
-		if (config->enable_high)
-			cfg.ena_gpio_flags |= GPIOF_OUT_INIT_LOW;
-		else
-			cfg.ena_gpio_flags |= GPIOF_OUT_INIT_HIGH;
+	/*
+	 * The signal will be inverted by the GPIO core if flagged so in the
+	 * decriptor.
+	 */
+	if (config->enabled_at_boot)
+		gflags = GPIOD_OUT_HIGH | GPIOD_FLAGS_BIT_NONEXCLUSIVE;
+	else
+		gflags = GPIOD_OUT_LOW | GPIOD_FLAGS_BIT_NONEXCLUSIVE;
+
+	cfg.ena_gpiod = gpiod_get_optional(&pdev->dev, "enable", gflags);
+	if (IS_ERR(cfg.ena_gpiod)) {
+		ret = PTR_ERR(cfg.ena_gpiod);
+		goto err_memstate;
 	}
 
 	drvdata->dev = regulator_register(&drvdata->desc, &cfg);
@@ -370,10 +341,6 @@ static int gpio_regulator_probe(struct platform_device *pdev)
 
 err_memstate:
 	kfree(drvdata->states);
-err_stategpio:
-	gpio_free_array(drvdata->gpios, drvdata->nr_gpios);
-err_memgpio:
-	kfree(drvdata->gpios);
 err_name:
 	kfree(drvdata->desc.name);
 	return ret;
@@ -384,12 +351,7 @@ static int gpio_regulator_remove(struct platform_device *pdev)
 	struct gpio_regulator_data *drvdata = platform_get_drvdata(pdev);
 
 	regulator_unregister(drvdata->dev);
-
-	gpio_free_array(drvdata->gpios, drvdata->nr_gpios);
-
 	kfree(drvdata->states);
-	kfree(drvdata->gpios);
-
 	kfree(drvdata->desc.name);
 
 	return 0;
diff --git a/include/linux/regulator/gpio-regulator.h b/include/linux/regulator/gpio-regulator.h
index 19fbd267406d..49c407afb944 100644
--- a/include/linux/regulator/gpio-regulator.h
+++ b/include/linux/regulator/gpio-regulator.h
@@ -21,6 +21,8 @@
 #ifndef __REGULATOR_GPIO_H
 #define __REGULATOR_GPIO_H
 
+#include <linux/gpio/consumer.h>
+
 struct regulator_init_data;
 
 enum regulator_type;
@@ -53,9 +55,9 @@ struct gpio_regulator_state {
  *			This is used to keep the regulator at
  *			the default state
  * @startup_delay:	Start-up time in microseconds
- * @gpios:		Array containing the gpios needed to control
- *			the setting of the regulator
- * @nr_gpios:		Number of gpios
+ * @gflags:		Array of GPIO configuration flags for initial
+ *			states
+ * @ngpios:		Number of GPIOs and configurations available
  * @states:		Array of gpio_regulator_state entries describing
  *			the gpio state for specific voltages
  * @nr_states:		Number of states available
@@ -74,8 +76,8 @@ struct gpio_regulator_config {
 	unsigned enabled_at_boot:1;
 	unsigned startup_delay;
 
-	struct gpio *gpios;
-	int nr_gpios;
+	enum gpiod_flags *gflags;
+	int ngpios;
 
 	struct gpio_regulator_state *states;
 	int nr_states;
-- 
2.20.1

[PATCH 2/5 v10] regulator: fixed/gpio: Pull inversion/OD into gpiolib

[Linus Walleij]

This pushes the handling of inversion semantics and open drain
settings to the GPIO descriptor and gpiolib. All affected board
files are also augmented.

This is especially nice since we don't have to have any
confusing flags passed around to the left and right littering
the fixed and GPIO regulator drivers and the regulator core.
It is all just very straight-forward: the core asks the GPIO
line to be asserted or deasserted and gpiolib deals with the
rest depending on how the platform is configured: if the line
is active low, it deals with that, if the line is open drain,
it deals with that too.

Cc: Alexander Shiyan <shc_work@mail.ru> # i.MX boards user
Cc: Haojian Zhuang <haojian.zhuang@gmail.com> # MMP2 maintainer
Cc: Aaro Koskinen <aaro.koskinen@iki.fi> # OMAP1 maintainer
Cc: Tony Lindgren <tony@atomide.com> # OMAP1,2,3 maintainer
Cc: Mike Rapoport <rppt@linux.vnet.ibm.com> # EM-X270 maintainer
Cc: Robert Jarzmik <robert.jarzmik@free.fr> # EZX maintainer
Cc: Philipp Zabel <philipp.zabel@gmail.com> # Magician maintainer
Cc: Petr Cvek <petr.cvek@tul.cz> # Magician
Cc: Robert Jarzmik <robert.jarzmik@free.fr> # PXA
Cc: Paul Parsons <lost.distance@yahoo.com> # hx4700
Cc: Daniel Mack <zonque@gmail.com> # Raumfeld maintainer
Cc: Marc Zyngier <marc.zyngier@arm.com> # Zeus maintainer
Cc: Geert Uytterhoeven <geert+renesas@glider.be> # SuperH pinctrl/GPIO maintainer
Cc: Russell King <rmk+kernel@armlinux.org.uk> # SA1100
Tested-by: Marek Szyprowski <m.szyprowski@samsung.com>
Tested-by: Janusz Krzysztofik <jmkrzyszt@gmail.com> #OMAP1 Amstrad Delta
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
---
ChangeLog v9->v10:
- Rebase on other changes.
ChangeLog v8->v9:
- Rebased on other changes.
- Collected Marek's Tested-by.
ChangeLog v7->v8:
- Rebase on v5.0-rc1.
- Collected Janusz Tested-by tag for OMAP1.
ChangeLog v6->v7:
- Fix a missed .enable_high on OMAP1.
ChangeLog v4->v6:
- Split out parts relation to GPIO regulator descriptor conversion
  to the right patch.
- Renumber to fit the rest of the series.
- Daniel Mack says he will probably delete the Raumfeld board file
  and replace it with a device tree, I suggest we just deal with that
  conflict upstream.
ChangeLog v3->v4:
- Rebase on fixed regulator changes.
ChangeLog v2->v3:
- Resending.
ChangeLog v1->v2:
- Rebase the patch series
- Cover the new user added in sa1100
---
 arch/arm/mach-imx/mach-mx21ads.c              |  1 -
 arch/arm/mach-imx/mach-mx27ads.c              |  2 +-
 arch/arm/mach-mmp/brownstone.c                |  1 -
 arch/arm/mach-omap1/board-ams-delta.c         |  2 --
 arch/arm/mach-omap2/pdata-quirks.c            |  1 -
 arch/arm/mach-pxa/em-x270.c                   |  1 -
 arch/arm/mach-pxa/ezx.c                       |  3 +-
 arch/arm/mach-pxa/raumfeld.c                  |  1 -
 arch/arm/mach-pxa/zeus.c                      |  3 +-
 arch/arm/mach-sa1100/assabet.c                |  1 -
 arch/sh/boards/mach-ecovec24/setup.c          |  2 --
 .../intel-mid/device_libs/platform_bcm43xx.c  |  1 -
 drivers/regulator/core.c                      |  8 ++---
 drivers/regulator/da9055-regulator.c          |  1 -
 drivers/regulator/fixed.c                     | 35 +++++--------------
 include/linux/regulator/fixed.h               | 10 ------
 include/linux/regulator/gpio-regulator.h      |  6 ----
 17 files changed, 13 insertions(+), 66 deletions(-)

diff --git a/arch/arm/mach-imx/mach-mx21ads.c b/arch/arm/mach-imx/mach-mx21ads.c
index 2e1e540f2e5a..d278fb672d40 100644
--- a/arch/arm/mach-imx/mach-mx21ads.c
+++ b/arch/arm/mach-imx/mach-mx21ads.c
@@ -205,7 +205,6 @@ static struct regulator_init_data mx21ads_lcd_regulator_init_data = {
 static struct fixed_voltage_config mx21ads_lcd_regulator_pdata = {
 	.supply_name	= "LCD",
 	.microvolts	= 3300000,
-	.enable_high	= 1,
 	.init_data	= &mx21ads_lcd_regulator_init_data,
 };
 
diff --git a/arch/arm/mach-imx/mach-mx27ads.c b/arch/arm/mach-imx/mach-mx27ads.c
index f5e04047ed13..6dd7f57c332f 100644
--- a/arch/arm/mach-imx/mach-mx27ads.c
+++ b/arch/arm/mach-imx/mach-mx27ads.c
@@ -237,7 +237,7 @@ static struct fixed_voltage_config mx27ads_lcd_regulator_pdata = {
 static struct gpiod_lookup_table mx27ads_lcd_regulator_gpiod_table = {
 	.dev_id = "reg-fixed-voltage.0", /* Let's hope ID 0 is what we get */
 	.table = {
-		GPIO_LOOKUP("LCD", 0, NULL, GPIO_ACTIVE_HIGH),
+		GPIO_LOOKUP("LCD", 0, NULL, GPIO_ACTIVE_LOW),
 		{ },
 	},
 };
diff --git a/arch/arm/mach-mmp/brownstone.c b/arch/arm/mach-mmp/brownstone.c
index a04e249c654b..d2560fb1e835 100644
--- a/arch/arm/mach-mmp/brownstone.c
+++ b/arch/arm/mach-mmp/brownstone.c
@@ -149,7 +149,6 @@ static struct regulator_init_data brownstone_v_5vp_data = {
 static struct fixed_voltage_config brownstone_v_5vp = {
 	.supply_name		= "v_5vp",
 	.microvolts		= 5000000,
-	.enable_high		= 1,
 	.enabled_at_boot	= 1,
 	.init_data		= &brownstone_v_5vp_data,
 };
diff --git a/arch/arm/mach-omap1/board-ams-delta.c b/arch/arm/mach-omap1/board-ams-delta.c
index c4c0a8ea11e4..be30c3c061b4 100644
--- a/arch/arm/mach-omap1/board-ams-delta.c
+++ b/arch/arm/mach-omap1/board-ams-delta.c
@@ -267,7 +267,6 @@ static struct fixed_voltage_config modem_nreset_config = {
 	.supply_name		= "modem_nreset",
 	.microvolts		= 3300000,
 	.startup_delay		= 25000,
-	.enable_high		= 1,
 	.enabled_at_boot	= 1,
 	.init_data		= &modem_nreset_data,
 };
@@ -533,7 +532,6 @@ static struct regulator_init_data keybrd_pwr_initdata = {
 static struct fixed_voltage_config keybrd_pwr_config = {
 	.supply_name		= "keybrd_pwr",
 	.microvolts		= 5000000,
-	.enable_high		= 1,
 	.init_data		= &keybrd_pwr_initdata,
 };
 
diff --git a/arch/arm/mach-omap2/pdata-quirks.c b/arch/arm/mach-omap2/pdata-quirks.c
index 8a5b6ed4ec36..a2ecc5e69abb 100644
--- a/arch/arm/mach-omap2/pdata-quirks.c
+++ b/arch/arm/mach-omap2/pdata-quirks.c
@@ -330,7 +330,6 @@ static struct fixed_voltage_config pandora_vwlan = {
 	.supply_name		= "vwlan",
 	.microvolts		= 1800000, /* 1.8V */
 	.startup_delay		= 50000, /* 50ms */
-	.enable_high		= 1,
 	.init_data		= &pandora_vmmc3,
 };
 
diff --git a/arch/arm/mach-pxa/em-x270.c b/arch/arm/mach-pxa/em-x270.c
index 32c1edeb3f14..5ba7bb7f7d51 100644
--- a/arch/arm/mach-pxa/em-x270.c
+++ b/arch/arm/mach-pxa/em-x270.c
@@ -976,7 +976,6 @@ static struct fixed_voltage_config camera_dummy_config = {
 	.supply_name		= "camera_vdd",
 	.input_supply		= "vcc cam",
 	.microvolts		= 2800000,
-	.enable_high		= 0,
 	.init_data		= &camera_dummy_initdata,
 };
 
diff --git a/arch/arm/mach-pxa/ezx.c b/arch/arm/mach-pxa/ezx.c
index 565965e9acc7..5e110e70ce5a 100644
--- a/arch/arm/mach-pxa/ezx.c
+++ b/arch/arm/mach-pxa/ezx.c
@@ -714,7 +714,6 @@ static struct regulator_init_data camera_regulator_initdata = {
 static struct fixed_voltage_config camera_regulator_config = {
 	.supply_name		= "camera_vdd",
 	.microvolts		= 2800000,
-	.enable_high		= 0,
 	.init_data		= &camera_regulator_initdata,
 };
 
@@ -730,7 +729,7 @@ static struct gpiod_lookup_table camera_supply_gpiod_table = {
 	.dev_id = "reg-fixed-voltage.1",
 	.table = {
 		GPIO_LOOKUP("gpio-pxa", GPIO50_nCAM_EN,
-			    NULL, GPIO_ACTIVE_HIGH),
+			    NULL, GPIO_ACTIVE_LOW),
 		{ },
 	},
 };
diff --git a/arch/arm/mach-pxa/raumfeld.c b/arch/arm/mach-pxa/raumfeld.c
index e1db072756f2..e13bfc9b01d2 100644
--- a/arch/arm/mach-pxa/raumfeld.c
+++ b/arch/arm/mach-pxa/raumfeld.c
@@ -883,7 +883,6 @@ static struct regulator_init_data audio_va_initdata = {
 static struct fixed_voltage_config audio_va_config = {
 	.supply_name		= "audio_va",
 	.microvolts		= 5000000,
-	.enable_high		= 1,
 	.enabled_at_boot	= 0,
 	.init_data		= &audio_va_initdata,
 };
diff --git a/arch/arm/mach-pxa/zeus.c b/arch/arm/mach-pxa/zeus.c
index c411f79d4cb5..ebd654302387 100644
--- a/arch/arm/mach-pxa/zeus.c
+++ b/arch/arm/mach-pxa/zeus.c
@@ -426,7 +426,7 @@ static struct gpiod_lookup_table can_regulator_gpiod_table = {
 	.dev_id = "reg-fixed-voltage.0",
 	.table = {
 		GPIO_LOOKUP("gpio-pxa", ZEUS_CAN_SHDN_GPIO,
-			    NULL, GPIO_ACTIVE_HIGH),
+			    NULL, GPIO_ACTIVE_LOW),
 		{ },
 	},
 };
@@ -547,7 +547,6 @@ static struct regulator_init_data zeus_ohci_regulator_data = {
 static struct fixed_voltage_config zeus_ohci_regulator_config = {
 	.supply_name		= "vbus2",
 	.microvolts		= 5000000, /* 5.0V */
-	.enable_high		= 1,
 	.startup_delay		= 0,
 	.init_data		= &zeus_ohci_regulator_data,
 };
diff --git a/arch/arm/mach-sa1100/assabet.c b/arch/arm/mach-sa1100/assabet.c
index dfa42496ec27..d09c3f236186 100644
--- a/arch/arm/mach-sa1100/assabet.c
+++ b/arch/arm/mach-sa1100/assabet.c
@@ -469,7 +469,6 @@ static struct regulator_consumer_supply assabet_cf_vcc_consumers[] = {
 static struct fixed_voltage_config assabet_cf_vcc_pdata __initdata = {
 	.supply_name = "cf-power",
 	.microvolts = 3300000,
-	.enable_high = 1,
 };
 
 static struct gpiod_lookup_table assabet_cf_vcc_gpio_table = {
diff --git a/arch/sh/boards/mach-ecovec24/setup.c b/arch/sh/boards/mach-ecovec24/setup.c
index 22b4106b8084..5495efa07335 100644
--- a/arch/sh/boards/mach-ecovec24/setup.c
+++ b/arch/sh/boards/mach-ecovec24/setup.c
@@ -630,7 +630,6 @@ static struct regulator_init_data cn12_power_init_data = {
 static struct fixed_voltage_config cn12_power_info = {
 	.supply_name = "CN12 SD/MMC Vdd",
 	.microvolts = 3300000,
-	.enable_high = 1,
 	.init_data = &cn12_power_init_data,
 };
 
@@ -671,7 +670,6 @@ static struct regulator_init_data sdhi0_power_init_data = {
 static struct fixed_voltage_config sdhi0_power_info = {
 	.supply_name = "CN11 SD/MMC Vdd",
 	.microvolts = 3300000,
-	.enable_high = 1,
 	.init_data = &sdhi0_power_init_data,
 };
 
diff --git a/arch/x86/platform/intel-mid/device_libs/platform_bcm43xx.c b/arch/x86/platform/intel-mid/device_libs/platform_bcm43xx.c
index 96f438d4b026..1421d5330b2c 100644
--- a/arch/x86/platform/intel-mid/device_libs/platform_bcm43xx.c
+++ b/arch/x86/platform/intel-mid/device_libs/platform_bcm43xx.c
@@ -44,7 +44,6 @@ static struct fixed_voltage_config bcm43xx_vmmc = {
 	 */
 	.microvolts		= 2000000,		/* 1.8V */
 	.startup_delay		= 250 * 1000,		/* 250ms */
-	.enable_high		= 1,			/* active high */
 	.enabled_at_boot	= 0,			/* disabled at boot */
 	.init_data		= &bcm43xx_vmmc_data,
 };
diff --git a/drivers/regulator/core.c b/drivers/regulator/core.c
index b9d7b45c7295..48baa03ff3d8 100644
--- a/drivers/regulator/core.c
+++ b/drivers/regulator/core.c
@@ -82,7 +82,6 @@ struct regulator_enable_gpio {
 	struct gpio_desc *gpiod;
 	u32 enable_count;	/* a number of enabled shared GPIO */
 	u32 request_count;	/* a number of requested shared GPIO */
-	unsigned int ena_gpio_invert:1;
 };
 
 /*
@@ -2268,7 +2267,6 @@ static int regulator_ena_gpio_request(struct regulator_dev *rdev,
 	}
 
 	pin->gpiod = gpiod;
-	pin->ena_gpio_invert = config->ena_gpio_invert;
 	list_add(&pin->list, &regulator_ena_gpio_list);
 
 update_ena_gpio_to_rdev:
@@ -2319,8 +2317,7 @@ static int regulator_ena_gpio_ctrl(struct regulator_dev *rdev, bool enable)
 	if (enable) {
 		/* Enable GPIO at initial use */
 		if (pin->enable_count == 0)
-			gpiod_set_value_cansleep(pin->gpiod,
-						 !pin->ena_gpio_invert);
+			gpiod_set_value_cansleep(pin->gpiod, 1);
 
 		pin->enable_count++;
 	} else {
@@ -2331,8 +2328,7 @@ static int regulator_ena_gpio_ctrl(struct regulator_dev *rdev, bool enable)
 
 		/* Disable GPIO if not used */
 		if (pin->enable_count <= 1) {
-			gpiod_set_value_cansleep(pin->gpiod,
-						 pin->ena_gpio_invert);
+			gpiod_set_value_cansleep(pin->gpiod, 0);
 			pin->enable_count = 0;
 		}
 	}
diff --git a/drivers/regulator/da9055-regulator.c b/drivers/regulator/da9055-regulator.c
index 588c3d2445cf..417cafe2aba0 100644
--- a/drivers/regulator/da9055-regulator.c
+++ b/drivers/regulator/da9055-regulator.c
@@ -457,7 +457,6 @@ static int da9055_gpio_init(struct da9055_regulator *regulator,
 		int gpio_mux = pdata->gpio_ren[id];
 
 		config->ena_gpiod = pdata->ena_gpiods[id];
-		config->ena_gpio_invert = 1;
 
 		/*
 		 * GPI pin is muxed with regulator to control the
diff --git a/drivers/regulator/fixed.c b/drivers/regulator/fixed.c
index 9abdb9130766..b5afc9db2c61 100644
--- a/drivers/regulator/fixed.c
+++ b/drivers/regulator/fixed.c
@@ -79,15 +79,6 @@ of_get_fixed_voltage_config(struct device *dev,
 
 	of_property_read_u32(np, "startup-delay-us", &config->startup_delay);
 
-	/*
-	 * FIXME: we pulled active low/high and open drain handling into
-	 * gpiolib so it will be handled there. Delete this in the second
-	 * step when we also remove the custom inversion handling for all
-	 * legacy boardfiles.
-	 */
-	config->enable_high = 1;
-	config->gpio_is_open_drain = 0;
-
 	if (of_find_property(np, "vin-supply", NULL))
 		config->input_supply = "vin";
 
@@ -151,24 +142,14 @@ static int reg_fixed_voltage_probe(struct platform_device *pdev)
 
 	drvdata->desc.fixed_uV = config->microvolts;
 
-	cfg.ena_gpio_invert = !config->enable_high;
-	if (config->enabled_at_boot) {
-		if (config->enable_high)
-			gflags = GPIOD_OUT_HIGH;
-		else
-			gflags = GPIOD_OUT_LOW;
-	} else {
-		if (config->enable_high)
-			gflags = GPIOD_OUT_LOW;
-		else
-			gflags = GPIOD_OUT_HIGH;
-	}
-	if (config->gpio_is_open_drain) {
-		if (gflags == GPIOD_OUT_HIGH)
-			gflags = GPIOD_OUT_HIGH_OPEN_DRAIN;
-		else
-			gflags = GPIOD_OUT_LOW_OPEN_DRAIN;
-	}
+	/*
+	 * The signal will be inverted by the GPIO core if flagged so in the
+	 * decriptor.
+	 */
+	if (config->enabled_at_boot)
+		gflags = GPIOD_OUT_HIGH;
+	else
+		gflags = GPIOD_OUT_LOW;
 
 	/*
 	 * Some fixed regulators share the enable line between two
diff --git a/include/linux/regulator/fixed.h b/include/linux/regulator/fixed.h
index 1a4340ed8e2b..f10140da7145 100644
--- a/include/linux/regulator/fixed.h
+++ b/include/linux/regulator/fixed.h
@@ -25,14 +25,6 @@ struct regulator_init_data;
  * @input_supply:	Name of the input regulator supply
  * @microvolts:		Output voltage of regulator
  * @startup_delay:	Start-up time in microseconds
- * @gpio_is_open_drain: Gpio pin is open drain or normal type.
- *			If it is open drain type then HIGH will be set
- *			through PULL-UP with setting gpio as input
- *			and low will be set as gpio-output with driven
- *			to low. For non-open-drain case, the gpio will
- *			will be in output and drive to low/high accordingly.
- * @enable_high:	Polarity of enable GPIO
- *			1 = Active high, 0 = Active low
  * @enabled_at_boot:	Whether regulator has been enabled at
  * 			boot or not. 1 = Yes, 0 = No
  * 			This is used to keep the regulator at
@@ -48,8 +40,6 @@ struct fixed_voltage_config {
 	const char *input_supply;
 	int microvolts;
 	unsigned startup_delay;
-	unsigned gpio_is_open_drain:1;
-	unsigned enable_high:1;
 	unsigned enabled_at_boot:1;
 	struct regulator_init_data *init_data;
 };
diff --git a/include/linux/regulator/gpio-regulator.h b/include/linux/regulator/gpio-regulator.h
index 49c407afb944..11cd6375215d 100644
--- a/include/linux/regulator/gpio-regulator.h
+++ b/include/linux/regulator/gpio-regulator.h
@@ -46,10 +46,6 @@ 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
  *			boot or not. 1 = Yes, 0 = No
  *			This is used to keep the regulator at
@@ -71,8 +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;
 
-- 
2.20.1

[PATCH 3/5 v10] regulator: fixed/gpio: Update device tree bindings

[Linus Walleij]

Deprecate the open drain binding for fixed regulator and indicate
that we prefer this to be passed in the GPIO phandle flags.

Clarify that the line inversion semantics for fixed and GPIO
regulators completely overrides the active low flags in the
phandle flags.

Unfortunately this can not be changed to prefer that we pass
the flags in the phandle: the bindings have been specified and
deployed such that the presence/absence of this flag and only
that controls the line inversion semantics. The crucial semantic
is that the absence of the flag means the core will assume
the line is active low, which in GPIO terms is an exception,
as GPIO lines are normally assumed to be active high.

This special device tree semantic cannot be changed without
introducing a whole new compatible string for the fixed and
GPIO regulators, so we just contain the situation.

Cc: devicetree@vger.kernel.org
Reviewed-by: Rob Herring <robh@kernel.org>
Tested-by: Marek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
---
ChangeLog v9->v10:
- Rebase on other changes.
ChangeLog v8->v9:
- Rebased on other changes.
- Collected Marek's Tested-by.
ChangeLog v7->v8:
- Rebase on v5.0-rc1.
ChangeLog v6->v7:
- Resend with the rest.
ChangeLog v3->v6:
- Resending.
ChangeLog v2->v3:
- Resending.
ChangeLog v1->v2:
- Collect Rob's ACK.
---
 .../bindings/regulator/fixed-regulator.txt          | 13 +++++++++++--
 .../bindings/regulator/gpio-regulator.txt           |  4 ++++
 2 files changed, 15 insertions(+), 2 deletions(-)

diff --git a/Documentation/devicetree/bindings/regulator/fixed-regulator.txt b/Documentation/devicetree/bindings/regulator/fixed-regulator.txt
index 0c2a6c8a1536..a7a1cd0dfa6e 100644
--- a/Documentation/devicetree/bindings/regulator/fixed-regulator.txt
+++ b/Documentation/devicetree/bindings/regulator/fixed-regulator.txt
@@ -8,10 +8,19 @@ Optional properties:
 - gpio: gpio to use for enable control
 - startup-delay-us: startup time in microseconds
 - enable-active-high: Polarity of GPIO is Active high
-If this property is missing, the default assumed is Active low.
+  If this property is missing, the default assumed is Active low.
+  If the phandle flags to the GPIO handle also flag the line as active
+  low or high, that will be ignored for fixed regulators and the
+  presence or absence of this flag solely controls the inversion
+  semantics.
+-vin-supply: Input supply name.
+
+Deprecated properties:
 - gpio-open-drain: GPIO is open drain type.
   If this property is missing then default assumption is false.
--vin-supply: Input supply name.
+  Do not use this property in new device trees: instead use the
+  phandle flag to indicate to the GPIO provider that the line
+  should be handled as open drain.
 
 Any property defined as part of the core regulator
 binding, defined in regulator.txt, can also be used.
diff --git a/Documentation/devicetree/bindings/regulator/gpio-regulator.txt b/Documentation/devicetree/bindings/regulator/gpio-regulator.txt
index 1f496159e2bb..8fef3e5358a2 100644
--- a/Documentation/devicetree/bindings/regulator/gpio-regulator.txt
+++ b/Documentation/devicetree/bindings/regulator/gpio-regulator.txt
@@ -14,6 +14,10 @@ Optional properties:
 			  defualt is LOW if nothing is specified.
 - startup-delay-us	: Startup time in microseconds.
 - enable-active-high	: Polarity of GPIO is active high (default is low).
+			  If the phandle flags to the GPIO handle also flag the line as
+			  active low or high, that will be ignored for fixed regulators
+			  and the presence or absence of this flag solely controls the
+			  inversion semantics.
 - regulator-type	: Specifies what is being regulated, must be either
 			  "voltage" or "current", defaults to voltage.
 
-- 
2.20.1

[PATCH 4/5 v10] regulator: gpio: Simplify probe path

[Linus Walleij]

Use devm_* managed device resources and create a local
struct device *dev variable to simplify the code inside
probe().

Tested-by: Marek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
---
ChangeLog v9->v10:
- Properly change &pdev->dev to local dev pointer in this patch,
  this was acccidentally exploited in patch 1.
- Rebase on other changes.
ChangeLog v8->v9:
- Rebased on other changes.
- Collected Marek's Tested-by.
ChangeLog v7->v8:
- Rebase on v5.0-rc1.
ChangeLog v6->v7:
- Resend with the rest.
ChangeLog v3->v6:
- Rebase on top of the other changes.
- Change numbering to fit the rest of the series.
ChangeLog v2->v3:
- Resending.
ChangeLog v1->v2:
- Rebase the patch on the other changes.
---
 drivers/regulator/gpio-regulator.c | 58 +++++++++++++-----------------
 1 file changed, 24 insertions(+), 34 deletions(-)

diff --git a/drivers/regulator/gpio-regulator.c b/drivers/regulator/gpio-regulator.c
index 07fb41abd4e8..6157001df0a4 100644
--- a/drivers/regulator/gpio-regulator.c
+++ b/drivers/regulator/gpio-regulator.c
@@ -228,37 +228,38 @@ static struct regulator_ops gpio_regulator_current_ops = {
 
 static int gpio_regulator_probe(struct platform_device *pdev)
 {
-	struct gpio_regulator_config *config = dev_get_platdata(&pdev->dev);
-	struct device_node *np = pdev->dev.of_node;
+	struct device *dev = &pdev->dev;
+	struct gpio_regulator_config *config = dev_get_platdata(dev);
+	struct device_node *np = dev->of_node;
 	struct gpio_regulator_data *drvdata;
 	struct regulator_config cfg = { };
 	enum gpiod_flags gflags;
 	int ptr, ret, state, i;
 
-	drvdata = devm_kzalloc(&pdev->dev, sizeof(struct gpio_regulator_data),
+	drvdata = devm_kzalloc(dev, sizeof(struct gpio_regulator_data),
 			       GFP_KERNEL);
 	if (drvdata == NULL)
 		return -ENOMEM;
 
 	if (np) {
-		config = of_get_gpio_regulator_config(&pdev->dev, np,
+		config = of_get_gpio_regulator_config(dev, np,
 						      &drvdata->desc);
 		if (IS_ERR(config))
 			return PTR_ERR(config);
 	}
 
-	drvdata->desc.name = kstrdup(config->supply_name, GFP_KERNEL);
+	drvdata->desc.name = devm_kstrdup(dev, config->supply_name, GFP_KERNEL);
 	if (drvdata->desc.name == NULL) {
-		dev_err(&pdev->dev, "Failed to allocate supply name\n");
+		dev_err(dev, "Failed to allocate supply name\n");
 		return -ENOMEM;
 	}
 
-	drvdata->gpiods = devm_kzalloc(&pdev->dev, sizeof(struct gpio_desc *),
+	drvdata->gpiods = devm_kzalloc(dev, sizeof(struct gpio_desc *),
 				       GFP_KERNEL);
 	if (!drvdata->gpiods)
 		return -ENOMEM;
 	for (i = 0; i < config->ngpios; i++) {
-		drvdata->gpiods[i] = devm_gpiod_get_index(&pdev->dev,
+		drvdata->gpiods[i] = devm_gpiod_get_index(dev,
 							  NULL,
 							  i,
 							  config->gflags[i]);
@@ -269,14 +270,14 @@ static int gpio_regulator_probe(struct platform_device *pdev)
 	}
 	drvdata->nr_gpios = config->ngpios;
 
-	drvdata->states = kmemdup(config->states,
-				  config->nr_states *
-					 sizeof(struct gpio_regulator_state),
-				  GFP_KERNEL);
+	drvdata->states = devm_kmemdup(dev,
+				       config->states,
+				       config->nr_states *
+				       sizeof(struct gpio_regulator_state),
+				       GFP_KERNEL);
 	if (drvdata->states == NULL) {
-		dev_err(&pdev->dev, "Failed to allocate state data\n");
-		ret = -ENOMEM;
-		goto err_name;
+		dev_err(dev, "Failed to allocate state data\n");
+		return -ENOMEM;
 	}
 	drvdata->nr_states = config->nr_states;
 
@@ -295,9 +296,8 @@ static int gpio_regulator_probe(struct platform_device *pdev)
 		drvdata->desc.ops = &gpio_regulator_current_ops;
 		break;
 	default:
-		dev_err(&pdev->dev, "No regulator type set\n");
-		ret = -EINVAL;
-		goto err_memstate;
+		dev_err(dev, "No regulator type set\n");
+		return -EINVAL;
 	}
 
 	/* build initial state from gpio init data. */
@@ -308,7 +308,7 @@ static int gpio_regulator_probe(struct platform_device *pdev)
 	}
 	drvdata->state = state;
 
-	cfg.dev = &pdev->dev;
+	cfg.dev = dev;
 	cfg.init_data = config->init_data;
 	cfg.driver_data = drvdata;
 	cfg.of_node = np;
@@ -322,28 +322,20 @@ static int gpio_regulator_probe(struct platform_device *pdev)
 	else
 		gflags = GPIOD_OUT_LOW | GPIOD_FLAGS_BIT_NONEXCLUSIVE;
 
-	cfg.ena_gpiod = gpiod_get_optional(&pdev->dev, "enable", gflags);
-	if (IS_ERR(cfg.ena_gpiod)) {
-		ret = PTR_ERR(cfg.ena_gpiod);
-		goto err_memstate;
-	}
+	cfg.ena_gpiod = gpiod_get_optional(dev, "enable", gflags);
+	if (IS_ERR(cfg.ena_gpiod))
+		return PTR_ERR(cfg.ena_gpiod);
 
 	drvdata->dev = regulator_register(&drvdata->desc, &cfg);
 	if (IS_ERR(drvdata->dev)) {
 		ret = PTR_ERR(drvdata->dev);
-		dev_err(&pdev->dev, "Failed to register regulator: %d\n", ret);
-		goto err_memstate;
+		dev_err(dev, "Failed to register regulator: %d\n", ret);
+		return ret;
 	}
 
 	platform_set_drvdata(pdev, drvdata);
 
 	return 0;
-
-err_memstate:
-	kfree(drvdata->states);
-err_name:
-	kfree(drvdata->desc.name);
-	return ret;
 }
 
 static int gpio_regulator_remove(struct platform_device *pdev)
@@ -351,8 +343,6 @@ static int gpio_regulator_remove(struct platform_device *pdev)
 	struct gpio_regulator_data *drvdata = platform_get_drvdata(pdev);
 
 	regulator_unregister(drvdata->dev);
-	kfree(drvdata->states);
-	kfree(drvdata->desc.name);
 
 	return 0;
 }
-- 
2.20.1

[PATCH 5/5 v10] regulator: core: Only support passing enable GPIO descriptors

[Linus Walleij]

Now that we changed all providers to pass descriptors into the core
for enable GPIOs instead of a global GPIO number, delete the support
for passing GPIO numbers in, and we get a cleanup and size reduction
in the core, and from a GPIO point of view we use the modern, cleaner
interface.

Tested-by: Marek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
---
ChangeLog v9->v10:
- Rebase on other changes.
ChangeLog v8->v9:
- Rebased on other changes.
- Collected Marek's Tested-by.
ChangeLog v7->v8:
- Rebase on v5.0-rc1.
ChangeLog v6->v7:
- Resend with the rest.
ChangeLog v4->v6:
- Rebase on top of the other changes.
- Renumber to fit the rest of the series.
ChangeLog v3->v4:
- Also drop ena_gpio_invert from driver data
ChangeLog v2->v3:
- Resending.
ChangeLog v1->v2:
- Rebase the patch on the other changes.
---
 drivers/regulator/core.c         | 32 ++++++--------------------------
 include/linux/regulator/driver.h | 12 +-----------
 2 files changed, 7 insertions(+), 37 deletions(-)

diff --git a/drivers/regulator/core.c b/drivers/regulator/core.c
index 48baa03ff3d8..bb688125ebd4 100644
--- a/drivers/regulator/core.c
+++ b/drivers/regulator/core.c
@@ -23,7 +23,6 @@
 #include <linux/mutex.h>
 #include <linux/suspend.h>
 #include <linux/delay.h>
-#include <linux/gpio.h>
 #include <linux/gpio/consumer.h>
 #include <linux/of.h>
 #include <linux/regmap.h>
@@ -2236,35 +2235,19 @@ static int regulator_ena_gpio_request(struct regulator_dev *rdev,
 {
 	struct regulator_enable_gpio *pin;
 	struct gpio_desc *gpiod;
-	int ret;
 
-	if (config->ena_gpiod)
-		gpiod = config->ena_gpiod;
-	else
-		gpiod = gpio_to_desc(config->ena_gpio);
+	gpiod = config->ena_gpiod;
 
 	list_for_each_entry(pin, &regulator_ena_gpio_list, list) {
 		if (pin->gpiod == gpiod) {
-			rdev_dbg(rdev, "GPIO %d is already used\n",
-				config->ena_gpio);
+			rdev_dbg(rdev, "GPIO is already used\n");
 			goto update_ena_gpio_to_rdev;
 		}
 	}
 
-	if (!config->ena_gpiod) {
-		ret = gpio_request_one(config->ena_gpio,
-				       GPIOF_DIR_OUT | config->ena_gpio_flags,
-				       rdev_get_name(rdev));
-		if (ret)
-			return ret;
-	}
-
 	pin = kzalloc(sizeof(struct regulator_enable_gpio), GFP_KERNEL);
-	if (pin == NULL) {
-		if (!config->ena_gpiod)
-			gpio_free(config->ena_gpio);
+	if (pin == NULL)
 		return -ENOMEM;
-	}
 
 	pin->gpiod = gpiod;
 	list_add(&pin->list, &regulator_ena_gpio_list);
@@ -2287,7 +2270,6 @@ static void regulator_ena_gpio_free(struct regulator_dev *rdev)
 		if (pin->gpiod == rdev->ena_pin->gpiod) {
 			if (pin->request_count <= 1) {
 				pin->request_count = 0;
-				gpiod_put(pin->gpiod);
 				list_del(&pin->list);
 				kfree(pin);
 				rdev->ena_pin = NULL;
@@ -4971,15 +4953,13 @@ regulator_register(const struct regulator_desc *regulator_desc,
 			goto clean;
 	}
 
-	if (config->ena_gpiod ||
-	    ((config->ena_gpio || config->ena_gpio_initialized) &&
-	     gpio_is_valid(config->ena_gpio))) {
+	if (config->ena_gpiod) {
 		mutex_lock(&regulator_list_mutex);
 		ret = regulator_ena_gpio_request(rdev, config);
 		mutex_unlock(&regulator_list_mutex);
 		if (ret != 0) {
-			rdev_err(rdev, "Failed to request enable GPIO%d: %d\n",
-				 config->ena_gpio, ret);
+			rdev_err(rdev, "Failed to request enable GPIO: %d\n",
+				 ret);
 			goto clean;
 		}
 		/* The regulator core took over the GPIO descriptor */
diff --git a/include/linux/regulator/driver.h b/include/linux/regulator/driver.h
index 389bcaf7900f..e511e9d1cc86 100644
--- a/include/linux/regulator/driver.h
+++ b/include/linux/regulator/driver.h
@@ -401,13 +401,7 @@ struct regulator_desc {
  *           NULL).
  * @regmap: regmap to use for core regmap helpers if dev_get_regmap() is
  *          insufficient.
- * @ena_gpio_initialized: GPIO controlling regulator enable was properly
- *                        initialized, meaning that >= 0 is a valid gpio
- *                        identifier and < 0 is a non existent gpio.
- * @ena_gpio: GPIO controlling regulator enable.
- * @ena_gpiod: GPIO descriptor controlling regulator enable.
- * @ena_gpio_invert: Sense for GPIO enable control.
- * @ena_gpio_flags: Flags to use when calling gpio_request_one()
+ * @ena_gpiod: GPIO controlling regulator enable.
  */
 struct regulator_config {
 	struct device *dev;
@@ -416,11 +410,7 @@ struct regulator_config {
 	struct device_node *of_node;
 	struct regmap *regmap;
 
-	bool ena_gpio_initialized;
-	int ena_gpio;
 	struct gpio_desc *ena_gpiod;
-	unsigned int ena_gpio_invert:1;
-	unsigned int ena_gpio_flags;
 };
 
 /*
-- 
2.20.1

Re: [PATCH 3/5 v10] regulator: fixed/gpio: Update device tree bindings

[Mark Brown]

[-- Attachment #1: Type: text/plain, Size: 260 bytes --]

On Tue, Jan 29, 2019 at 11:31:54AM +0100, Linus Walleij wrote:
> Deprecate the open drain binding for fixed regulator and indicate
> that we prefer this to be passed in the GPIO phandle flags.

This doesn't apply against current code, please check and resend.

[-- Attachment #2: signature.asc --]
[-- Type: application/pgp-signature, Size: 488 bytes --]