From: Mark Brown <broonie@kernel.org>
Date: Wed, 30 May 2018 14:15:20 +0000 (+0100)
Subject: regulator: wm8994: Fix shared GPIOs
X-Git-Tag: v4.19~844^2~4
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=ab4d11e2c2329cf7cb7be31ff22489aae4dee5dc;p=platform%2Fkernel%2Flinux-rpi.git

regulator: wm8994: Fix shared GPIOs

This reverts commit 3c6b38d45fa51c7c51 "regulator: wm8994: Pass
descriptor instead of GPIO number" as it has problems with shared
GPIOs similar to that on s2mps11.

Reported-by: Marek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
---

diff --git a/arch/arm/mach-s3c64xx/mach-crag6410-module.c b/arch/arm/mach-s3c64xx/mach-crag6410-module.c
index 76c4855..5aa4728 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 = {
-		 { .init_data = &wm8994_ldo1, },
-		 { .init_data = &wm8994_ldo2, },
+		 { .enable = S3C64XX_GPN(6), .init_data = &wm8994_ldo1, },
+		 { .enable = S3C64XX_GPN(4), .init_data = &wm8994_ldo2, },
 	},
 };
 
@@ -203,18 +203,6 @@ 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),
-		{ },
 	},
 };
 
@@ -393,7 +381,6 @@ 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 c409464..953d079 100644
--- a/drivers/mfd/wm8994-core.c
+++ b/drivers/mfd/wm8994-core.c
@@ -21,6 +21,7 @@
 #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>
@@ -301,6 +302,14 @@ static int wm8994_set_pdata_from_of(struct wm8994 *wm8994)
 	if (of_find_property(np, "wlf,ldoena-always-driven", NULL))
 		pdata->lineout2fb = true;
 
+	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 d3a5f48..7a4ce6d 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/consumer.h>
+#include <linux/gpio.h>
 #include <linux/slab.h>
 
 #include <linux/mfd/wm8994/core.h>
@@ -129,7 +129,6 @@ 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);
@@ -146,14 +145,12 @@ static int wm8994_ldo_probe(struct platform_device *pdev)
 	config.driver_data = ldo;
 	config.regmap = wm8994->regmap;
 	config.init_data = &ldo->init_data;
-
-	/* 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);
-	if (IS_ERR(gpiod))
-		return PTR_ERR(gpiod);
-	config.ena_gpiod = gpiod;
+	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;
+	}
 
 	/* Use default constraints if none set up */
 	if (!pdata || !pdata->ldo[id].init_data || wm8994->dev->of_node) {
@@ -162,7 +159,7 @@ static int wm8994_ldo_probe(struct platform_device *pdev)
 
 		ldo->init_data = wm8994_ldo_default[id];
 		ldo->init_data.consumer_supplies = &ldo->supply;
-		if (!gpiod)
+		if (!config.ena_gpio)
 			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 fca67bd..90c6052 100644
--- a/include/linux/mfd/wm8994/pdata.h
+++ b/include/linux/mfd/wm8994/pdata.h
@@ -20,6 +20,9 @@
 #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;
 };