[PATCH 0/8 v6] Finalize regulator descriptor work

[PATCH 0/8 v6] Finalize regulator descriptor work

[Linus Walleij]

This series finalizes the regulator descriptor work.

We do this by:

- Tidying up remaining drivers using .ena_gpio to pass
  descriptors.

- Converting the GPIO regulator to use descriptors and
  passing a descriptor for .ena_gpio.

- Pull in all inversion and open drain semantics into
  gpiolib.

- Deleting the legacy GPIO numberspace handling from
  the GPIO core.

The 0day build robot is happy with the series.

Linus Walleij (8):
  regulator: s2mps11: Pass descriptor instead of GPIO number
  regulator: wm8994: Pass descriptor instead of GPIO number
  regulator: max77686: Pass descriptor instead of GPIO number
  regulator: gpio: Convert to use descriptors
  regulator: fixed/gpio: Pull inversion/OD into gpiolib
  regulator: fixed/gpio: Update device tree bindings
  regulator: gpio: Simplify probe path
  regulator: core: Only support passing enable GPIO descriptors

 .../bindings/regulator/fixed-regulator.txt    |  13 +-
 .../bindings/regulator/gpio-regulator.txt     |   4 +
 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         |   1 -
 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/hx4700.c                    |  23 ++-
 arch/arm/mach-pxa/magician.c                  |  23 ++-
 arch/arm/mach-pxa/raumfeld.c                  |   1 -
 arch/arm/mach-pxa/zeus.c                      |   3 +-
 arch/arm/mach-s3c64xx/mach-crag6410-module.c  |  17 +-
 arch/arm/mach-sa1100/assabet.c                |   1 -
 arch/sh/boards/mach-ecovec24/setup.c          |   2 -
 .../intel-mid/device_libs/platform_bcm43xx.c  |   1 -
 drivers/mfd/wm8994-core.c                     |   9 -
 drivers/regulator/core.c                      |  40 +---
 drivers/regulator/da9055-regulator.c          |   1 -
 drivers/regulator/fixed.c                     |  35 +---
 drivers/regulator/gpio-regulator.c            | 189 +++++++-----------
 drivers/regulator/max77686-regulator.c        |  19 +-
 drivers/regulator/s2mps11.c                   |  46 ++---
 drivers/regulator/wm8994-regulator.c          |  20 +-
 include/linux/mfd/wm8994/pdata.h              |   3 -
 include/linux/regulator/driver.h              |  12 +-
 include/linux/regulator/fixed.h               |  10 -
 include/linux/regulator/gpio-regulator.h      |  18 +-
 29 files changed, 205 insertions(+), 295 deletions(-)

-- 
2.17.2

[PATCH 1/8 v6] regulator: s2mps11: Pass descriptor instead of GPIO number

[Linus Walleij]

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.

Tested on Odroid XU3 (with s2mps11 although not using any GPIOs
for regulators, so at least default paths are not broken).

Cc: Sangbeom Kim <sbkim73@samsung.com>
Cc: Chanwoo Choi <cw00.choi@samsung.com>
Cc: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Cc: Krzysztof Kozlowski <krzk@kernel.org>
Reviewed-by: Krzysztof Kozlowski <krzk@kernel.org>
Tested-by: Krzysztof Kozlowski <krzk@kernel.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
---
ChangeLog v5->v6:
- Tag on the nonexclusive bit as regulators can share a
  GPIO line.
ChangeLog v4->v5:
- Fold in a kzalloc() fix from Bartlomiej Zolnierkiewicz
ChangeLog v3->v4:
- Changed regulator name to "s2mps11-regulator"
- Collected Krzysztof's review and test tags.
ChangeLog v2->v3:
- Resending.
ChangeLog v1->v2:
- Rebase the patch on the other changes.
---
 drivers/regulator/s2mps11.c | 46 ++++++++++++++++++-------------------
 1 file changed, 23 insertions(+), 23 deletions(-)

diff --git a/drivers/regulator/s2mps11.c b/drivers/regulator/s2mps11.c
index 5bb6f4ca48db..6fec45897194 100644
--- a/drivers/regulator/s2mps11.c
+++ b/drivers/regulator/s2mps11.c
@@ -5,7 +5,7 @@
 
 #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>
@@ -14,7 +14,6 @@
 #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>
@@ -44,7 +43,7 @@ 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)
@@ -511,7 +510,7 @@ 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;
@@ -805,7 +804,7 @@ 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 };
@@ -816,11 +815,20 @@ 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 | GPIOD_FLAGS_BIT_NONEXCLUSIVE,
+				"s2mps11-regulator");
+		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);
 	}
 }
 
@@ -1126,17 +1134,11 @@ static int s2mps11_pmic_probe(struct platform_device *pdev)
 		return -EINVAL;
 	}
 
-	s2mps11->ext_control_gpio = devm_kmalloc_array(&pdev->dev,
-			rdev_num, sizeof(*s2mps11->ext_control_gpio),
+	s2mps11->ext_control_gpiod = devm_kmalloc_array(&pdev->dev,
+			rdev_num, sizeof(*s2mps11->ext_control_gpiod),
 			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) {
@@ -1166,8 +1168,6 @@ static int s2mps11_pmic_probe(struct platform_device *pdev)
 	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;
 
@@ -1178,7 +1178,7 @@ static int s2mps11_pmic_probe(struct platform_device *pdev)
 			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);
@@ -1189,7 +1189,7 @@ static int s2mps11_pmic_probe(struct platform_device *pdev)
 			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) {
-- 
2.17.2

[PATCH 2/8 v6] regulator: wm8994: Pass descriptor instead of GPIO number

[Linus Walleij]

Instead of passing a global GPIO number for the enable GPIO, pass
a descriptor looked up from the device tree node or the board file
decriptor table for the regulator.

There is a single board file passing the GPIOs for LDO1 and LDO2
through platform data, so augment this to pass descriptors
associated with the i2c device as well.

The special GPIO enable DT property for the enable GPIO is
nonstandard but this was accomodated in
commit 6a537d48461deacc57c07ed86d9915e5aa4b3539
"gpio: of: Support regulator nonstandard GPIO properties".

Cc: patches@opensource.cirrus.com
Acked-by: Charles Keepax <ckeepax@opensource.cirrus.com>
Acked-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
---
ChangeLog v3->v6:
- Request the GPIO line as shared as with other regulators.
- Renumber to fit the rest of the patch series.
ChangeLog v2->v3:
- Collect Charles' ACK.
ChangeLog v1->v2:
- Rebase the patch on the other changes.
- Collect Lee's ACK.
---
 arch/arm/mach-s3c64xx/mach-crag6410-module.c | 17 +++++++++++++++--
 drivers/mfd/wm8994-core.c                    |  9 ---------
 drivers/regulator/wm8994-regulator.c         | 20 ++++++++++++--------
 include/linux/mfd/wm8994/pdata.h             |  3 ---
 4 files changed, 27 insertions(+), 22 deletions(-)

diff --git a/arch/arm/mach-s3c64xx/mach-crag6410-module.c b/arch/arm/mach-s3c64xx/mach-crag6410-module.c
index 5aa472892465..76c4855a03bc 100644
--- a/arch/arm/mach-s3c64xx/mach-crag6410-module.c
+++ b/arch/arm/mach-s3c64xx/mach-crag6410-module.c
@@ -194,8 +194,8 @@ static struct wm8994_pdata wm8994_pdata = {
 		0x3,          /* IRQ out, active high, CMOS */
 	},
 	.ldo = {
-		 { .enable = S3C64XX_GPN(6), .init_data = &wm8994_ldo1, },
-		 { .enable = S3C64XX_GPN(4), .init_data = &wm8994_ldo2, },
+		 { .init_data = &wm8994_ldo1, },
+		 { .init_data = &wm8994_ldo2, },
 	},
 };
 
@@ -203,6 +203,18 @@ static const struct i2c_board_info wm1277_devs[] = {
 	{ I2C_BOARD_INFO("wm8958", 0x1a),  /* WM8958 is the superset */
 	  .platform_data = &wm8994_pdata,
 	  .irq = GLENFARCLAS_PMIC_IRQ_BASE + WM831X_IRQ_GPIO_2,
+	  .dev_name = "wm8958",
+	},
+};
+
+static struct gpiod_lookup_table wm8994_gpiod_table = {
+	.dev_id = "i2c-wm8958", /* I2C device name */
+	.table = {
+		GPIO_LOOKUP("GPION", 6,
+			    "wlf,ldo1ena", GPIO_ACTIVE_HIGH),
+		GPIO_LOOKUP("GPION", 4,
+			    "wlf,ldo2ena", GPIO_ACTIVE_HIGH),
+		{ },
 	},
 };
 
@@ -381,6 +393,7 @@ static int wlf_gf_module_probe(struct i2c_client *i2c,
 
 	gpiod_add_lookup_table(&wm5102_reva_gpiod_table);
 	gpiod_add_lookup_table(&wm5102_gpiod_table);
+	gpiod_add_lookup_table(&wm8994_gpiod_table);
 
 	if (i < ARRAY_SIZE(gf_mods)) {
 		dev_info(&i2c->dev, "%s revision %d\n",
diff --git a/drivers/mfd/wm8994-core.c b/drivers/mfd/wm8994-core.c
index 22bd6525e09c..04a177efd245 100644
--- a/drivers/mfd/wm8994-core.c
+++ b/drivers/mfd/wm8994-core.c
@@ -21,7 +21,6 @@
 #include <linux/mfd/core.h>
 #include <linux/of.h>
 #include <linux/of_device.h>
-#include <linux/of_gpio.h>
 #include <linux/pm_runtime.h>
 #include <linux/regmap.h>
 #include <linux/regulator/consumer.h>
@@ -306,14 +305,6 @@ static int wm8994_set_pdata_from_of(struct wm8994 *wm8994)
 
 	pdata->csnaddr_pd = of_property_read_bool(np, "wlf,csnaddr-pd");
 
-	pdata->ldo[0].enable = of_get_named_gpio(np, "wlf,ldo1ena", 0);
-	if (pdata->ldo[0].enable < 0)
-		pdata->ldo[0].enable = 0;
-
-	pdata->ldo[1].enable = of_get_named_gpio(np, "wlf,ldo2ena", 0);
-	if (pdata->ldo[1].enable < 0)
-		pdata->ldo[1].enable = 0;
-
 	return 0;
 }
 #else
diff --git a/drivers/regulator/wm8994-regulator.c b/drivers/regulator/wm8994-regulator.c
index 7a4ce6df4f22..d7fec533c403 100644
--- a/drivers/regulator/wm8994-regulator.c
+++ b/drivers/regulator/wm8994-regulator.c
@@ -19,7 +19,7 @@
 #include <linux/platform_device.h>
 #include <linux/regulator/driver.h>
 #include <linux/regulator/machine.h>
-#include <linux/gpio.h>
+#include <linux/gpio/consumer.h>
 #include <linux/slab.h>
 
 #include <linux/mfd/wm8994/core.h>
@@ -129,6 +129,7 @@ static int wm8994_ldo_probe(struct platform_device *pdev)
 	int id = pdev->id % ARRAY_SIZE(pdata->ldo);
 	struct regulator_config config = { };
 	struct wm8994_ldo *ldo;
+	struct gpio_desc *gpiod;
 	int ret;
 
 	dev_dbg(&pdev->dev, "Probing LDO%d\n", id + 1);
@@ -145,12 +146,15 @@ static int wm8994_ldo_probe(struct platform_device *pdev)
 	config.driver_data = ldo;
 	config.regmap = wm8994->regmap;
 	config.init_data = &ldo->init_data;
-	if (pdata) {
-		config.ena_gpio = pdata->ldo[id].enable;
-	} else if (wm8994->dev->of_node) {
-		config.ena_gpio = wm8994->pdata.ldo[id].enable;
-		config.ena_gpio_initialized = true;
-	}
+
+	/* Look up LDO enable GPIO from the parent device node */
+	gpiod = devm_gpiod_get_optional(pdev->dev.parent,
+					id ? "wlf,ldo2ena" : "wlf,ldo1ena",
+					GPIOD_OUT_LOW |
+					GPIOD_FLAGS_BIT_NONEXCLUSIVE);
+	if (IS_ERR(gpiod))
+		return PTR_ERR(gpiod);
+	config.ena_gpiod = gpiod;
 
 	/* Use default constraints if none set up */
 	if (!pdata || !pdata->ldo[id].init_data || wm8994->dev->of_node) {
@@ -159,7 +163,7 @@ static int wm8994_ldo_probe(struct platform_device *pdev)
 
 		ldo->init_data = wm8994_ldo_default[id];
 		ldo->init_data.consumer_supplies = &ldo->supply;
-		if (!config.ena_gpio)
+		if (!gpiod)
 			ldo->init_data.constraints.valid_ops_mask = 0;
 	} else {
 		ldo->init_data = *pdata->ldo[id].init_data;
diff --git a/include/linux/mfd/wm8994/pdata.h b/include/linux/mfd/wm8994/pdata.h
index b19c370fe81a..f346167c0e00 100644
--- a/include/linux/mfd/wm8994/pdata.h
+++ b/include/linux/mfd/wm8994/pdata.h
@@ -20,9 +20,6 @@
 #define WM8994_NUM_AIF   3
 
 struct wm8994_ldo_pdata {
-	/** GPIOs to enable regulator, 0 or less if not available */
-	int enable;
-
 	const struct regulator_init_data *init_data;
 };
 
-- 
2.17.2

[PATCH 3/8 v6] regulator: max77686: Pass descriptor instead of GPIO number

[Linus Walleij]

Instead of passing a global GPIO number, pass a descriptor looked
up from the device tree configuration node.

Tested on Odroid U3 (with max77686 although not using any GPIOs
for regulators, so at least default paths are not broken).

Cc: Chanwoo Choi <cw00.choi@samsung.com>
Cc: Krzysztof Kozlowski <krzk@kernel.org>
Cc: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Reviewed-by: Krzysztof Kozlowski <krzk@kernel.org>
Tested-by: Krzysztof Kozlowski <krzk@kernel.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
---
ChangeLog v4->v6:
- Request regulator nonexclusive as expected by the regulator
  core.
- Adjust numbering to fit the rest of the series.
ChangeLog v3->v4:
- Collected Krzysztof's test tags.
ChangeLog v2->v3:
- Name the regulator "max77686-regulator"
- Set the regulator to NULL on erroneous lookup, restoring the
  old init data lookup behaviour.
ChangeLog v1->v2:
- Rebase the patch on the other changes.
---
 drivers/regulator/max77686-regulator.c | 19 ++++++++++++-------
 1 file changed, 12 insertions(+), 7 deletions(-)

diff --git a/drivers/regulator/max77686-regulator.c b/drivers/regulator/max77686-regulator.c
index bee060937f56..f5cee1775905 100644
--- a/drivers/regulator/max77686-regulator.c
+++ b/drivers/regulator/max77686-regulator.c
@@ -11,8 +11,7 @@
 #include <linux/kernel.h>
 #include <linux/bug.h>
 #include <linux/err.h>
-#include <linux/gpio.h>
-#include <linux/of_gpio.h>
+#include <linux/gpio/consumer.h>
 #include <linux/slab.h>
 #include <linux/platform_device.h>
 #include <linux/regulator/driver.h>
@@ -76,6 +75,7 @@ enum max77686_ramp_rate {
 };
 
 struct max77686_data {
+	struct device *dev;
 	DECLARE_BITMAP(gpio_enabled, MAX77686_REGULATORS);
 
 	/* Array indexed by regulator id */
@@ -255,16 +255,20 @@ static int max77686_of_parse_cb(struct device_node *np,
 	case MAX77686_BUCK8:
 	case MAX77686_BUCK9:
 	case MAX77686_LDO20 ... MAX77686_LDO22:
-		config->ena_gpio = of_get_named_gpio(np,
-					"maxim,ena-gpios", 0);
-		config->ena_gpio_flags = GPIOF_OUT_INIT_HIGH;
-		config->ena_gpio_initialized = true;
+		config->ena_gpiod = devm_gpiod_get_from_of_node(max77686->dev,
+				np,
+				"maxim,ena",
+				0,
+				GPIOD_OUT_HIGH | GPIOD_FLAGS_BIT_NONEXCLUSIVE,
+				"max77686-regulator");
+		if (IS_ERR(config->ena_gpiod))
+			config->ena_gpiod = NULL;
 		break;
 	default:
 		return 0;
 	}
 
-	if (gpio_is_valid(config->ena_gpio)) {
+	if (config->ena_gpiod) {
 		set_bit(desc->id, max77686->gpio_enabled);
 
 		return regmap_update_bits(config->regmap, desc->enable_reg,
@@ -507,6 +511,7 @@ static int max77686_pmic_probe(struct platform_device *pdev)
 	if (!max77686)
 		return -ENOMEM;
 
+	max77686->dev = &pdev->dev;
 	config.dev = iodev->dev;
 	config.regmap = iodev->regmap;
 	config.driver_data = max77686;
-- 
2.17.2

[PATCH 4/8 v6] 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
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
---
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       | 146 ++++++++---------------
 include/linux/regulator/gpio-regulator.h |  12 +-
 4 files changed, 91 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 14c0f80bc9e7..5d21de79135b 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
  */
@@ -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 b2f5ec4f658a..68a6c861bcad 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 +253,17 @@ 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;
-		}
+	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 +272,7 @@ 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 +299,7 @@ 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 +309,19 @@ 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 = devm_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 +337,6 @@ 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 +347,7 @@ 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;
-- 
2.17.2

[PATCH 5/8 v6] 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: Janusz Krzysztofik <jmkrzyszt@gmail.com> # OMAP1
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
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
---
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         |  1 -
 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(+), 65 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 3d191fd52910..5a0c599ab516 100644
--- a/arch/arm/mach-omap1/board-ams-delta.c
+++ b/arch/arm/mach-omap1/board-ams-delta.c
@@ -268,7 +268,6 @@ 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,
 };
diff --git a/arch/arm/mach-omap2/pdata-quirks.c b/arch/arm/mach-omap2/pdata-quirks.c
index 9fec5f84bf77..69a9182a9aff 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 67e37df637f5..97f428e3b77a 100644
--- a/arch/arm/mach-pxa/em-x270.c
+++ b/arch/arm/mach-pxa/em-x270.c
@@ -984,7 +984,6 @@ 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 bd3c23ad6ce6..cffa182167a9 100644
--- a/arch/arm/mach-pxa/raumfeld.c
+++ b/arch/arm/mach-pxa/raumfeld.c
@@ -886,7 +886,6 @@ 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 d53ea12fc766..9b8c2cf23111 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 3e8c0948abcc..3723d70af471 100644
--- a/arch/arm/mach-sa1100/assabet.c
+++ b/arch/arm/mach-sa1100/assabet.c
@@ -468,7 +468,6 @@ 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 06a894526a0b..ffddec161292 100644
--- a/arch/sh/boards/mach-ecovec24/setup.c
+++ b/arch/sh/boards/mach-ecovec24/setup.c
@@ -633,7 +633,6 @@ 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,
 };
 
@@ -674,7 +673,6 @@ 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 dbfc5cf2aa93..e3b57c346f3b 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 2c66b528aede..109bd2bee868 100644
--- a/drivers/regulator/core.c
+++ b/drivers/regulator/core.c
@@ -80,7 +80,6 @@ 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;
 };
 
 /*
@@ -2047,7 +2046,6 @@ 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:
@@ -2098,8 +2096,7 @@ 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 {
@@ -2110,8 +2107,7 @@ 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 ccc29038f19a..adaac8f5ddca 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;
 
-- 
2.17.2

[PATCH 6/8 v6] 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>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
---
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.
 
-- 
2.17.2

[PATCH 7/8 v6] 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().

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
---
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 | 55 +++++++++++++-----------------
 1 file changed, 23 insertions(+), 32 deletions(-)

diff --git a/drivers/regulator/gpio-regulator.c b/drivers/regulator/gpio-regulator.c
index 68a6c861bcad..62ddea4a5255 100644
--- a/drivers/regulator/gpio-regulator.c
+++ b/drivers/regulator/gpio-regulator.c
@@ -228,31 +228,33 @@ 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;
 	}
 
+
 	for (i = 0; i < config->ngpios; i++) {
 		drvdata->gpiods[i] = devm_gpiod_get_index(&pdev->dev,
 							  NULL,
@@ -265,14 +267,14 @@ 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;
 
@@ -291,9 +293,8 @@ 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. */
@@ -304,7 +305,7 @@ 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;
@@ -318,28 +319,20 @@ static int gpio_regulator_probe(struct platform_device *pdev)
 	else
 		gflags = GPIOD_OUT_LOW | GPIOD_FLAGS_BIT_NONEXCLUSIVE;
 
-	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_memstate;
-	}
+	cfg.ena_gpiod = devm_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)
@@ -347,8 +340,6 @@ 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;
 }
-- 
2.17.2

[PATCH 8/8 v6] 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.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
---
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 109bd2bee868..0eb5c48f1162 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>
@@ -2015,35 +2014,19 @@ 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);
@@ -2066,7 +2049,6 @@ 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;
@@ -4336,15 +4318,13 @@ 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;
 		}
 	}
diff --git a/include/linux/regulator/driver.h b/include/linux/regulator/driver.h
index a9c030192147..10ee158eac00 100644
--- a/include/linux/regulator/driver.h
+++ b/include/linux/regulator/driver.h
@@ -400,13 +400,7 @@ 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;
@@ -415,11 +409,7 @@ 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;
 };
 
 /*
-- 
2.17.2