ARM: shmobile: switch SDHI0 to GPIO regulator on armadillo800eva

When regulators are used with MMC devices, explicitly provided OCR masks
are ignored, they can be removed from platform data. Also switch SDHI0
from fixed regulator with hard-wired GPIO levels to a proper GPIO regulator
instance to enable dynamic voltage switching.

Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>

arch/arm/mach-shmobile/board-armadillo800eva.c

@@ -28,8 +28,10 @@
 #include <linux/platform_device.h>
 #include <linux/gpio.h>
 #include <linux/gpio_keys.h>
+#include <linux/regulator/driver.h>
 #include <linux/pinctrl/machine.h>
 #include <linux/regulator/fixed.h>
+#include <linux/regulator/gpio-regulator.h>
 #include <linux/regulator/machine.h>
 #include <linux/sh_eth.h>
 #include <linux/videodev2.h>
@@ -555,17 +557,94 @@ static struct platform_device gpio_keys_device = {
 	},
 };
 
-/* Fixed 3.3V regulator to be used by SDHI0, SDHI1, MMCIF */
-static struct regulator_consumer_supply fixed3v3_power_consumers[] =
-{
-	REGULATOR_SUPPLY("vmmc", "sh_mobile_sdhi.0"),
-	REGULATOR_SUPPLY("vqmmc", "sh_mobile_sdhi.0"),
+/* Fixed 3.3V regulator to be used by SDHI1, MMCIF */
+static struct regulator_consumer_supply fixed3v3_power_consumers[] = {
 	REGULATOR_SUPPLY("vmmc", "sh_mobile_sdhi.1"),
 	REGULATOR_SUPPLY("vqmmc", "sh_mobile_sdhi.1"),
 	REGULATOR_SUPPLY("vmmc", "sh_mmcif"),
 	REGULATOR_SUPPLY("vqmmc", "sh_mmcif"),
 };
 
+/* Fixed 3.3V regulator to be used by SDHI0 */
+static struct regulator_consumer_supply vcc_sdhi0_consumers[] = {
+	REGULATOR_SUPPLY("vmmc", "sh_mobile_sdhi.0"),
+};
+
+static struct regulator_init_data vcc_sdhi0_init_data = {
+	.constraints = {
+		.valid_ops_mask = REGULATOR_CHANGE_STATUS,
+	},
+	.num_consumer_supplies  = ARRAY_SIZE(vcc_sdhi0_consumers),
+	.consumer_supplies      = vcc_sdhi0_consumers,
+};
+
+static struct fixed_voltage_config vcc_sdhi0_info = {
+	.supply_name = "SDHI0 Vcc",
+	.microvolts = 3300000,
+	.gpio = GPIO_PORT75,
+	.enable_high = 1,
+	.init_data = &vcc_sdhi0_init_data,
+};
+
+static struct platform_device vcc_sdhi0 = {
+	.name = "reg-fixed-voltage",
+	.id   = 1,
+	.dev  = {
+		.platform_data = &vcc_sdhi0_info,
+	},
+};
+
+/* 1.8 / 3.3V SDHI0 VccQ regulator */
+static struct regulator_consumer_supply vccq_sdhi0_consumers[] = {
+	REGULATOR_SUPPLY("vqmmc", "sh_mobile_sdhi.0"),
+};
+
+static struct regulator_init_data vccq_sdhi0_init_data = {
+	.constraints = {
+		.input_uV	= 3300000,
+		.min_uV		= 1800000,
+		.max_uV         = 3300000,
+		.valid_ops_mask = REGULATOR_CHANGE_VOLTAGE |
+				  REGULATOR_CHANGE_STATUS,
+	},
+	.num_consumer_supplies  = ARRAY_SIZE(vccq_sdhi0_consumers),
+	.consumer_supplies      = vccq_sdhi0_consumers,
+};
+
+static struct gpio vccq_sdhi0_gpios[] = {
+	{GPIO_PORT17, GPIOF_OUT_INIT_LOW, "vccq-sdhi0" },
+};
+
+static struct gpio_regulator_state vccq_sdhi0_states[] = {
+	{ .value = 3300000, .gpios = (0 << 0) },
+	{ .value = 1800000, .gpios = (1 << 0) },
+};
+
+static struct gpio_regulator_config vccq_sdhi0_info = {
+	.supply_name = "vqmmc",
+
+	.enable_gpio = GPIO_PORT74,
+	.enable_high = 1,
+	.enabled_at_boot = 0,
+
+	.gpios = vccq_sdhi0_gpios,
+	.nr_gpios = ARRAY_SIZE(vccq_sdhi0_gpios),
+
+	.states = vccq_sdhi0_states,
+	.nr_states = ARRAY_SIZE(vccq_sdhi0_states),
+
+	.type = REGULATOR_VOLTAGE,
+	.init_data = &vccq_sdhi0_init_data,
+};
+
+static struct platform_device vccq_sdhi0 = {
+	.name = "gpio-regulator",
+	.id   = -1,
+	.dev  = {
+		.platform_data = &vccq_sdhi0_info,
+	},
+};
+
 /* SDHI0 */
 /*
  * FIXME
@@ -580,7 +659,6 @@ static struct sh_mobile_sdhi_info sdhi0_info = {
 	.dma_slave_tx	= SHDMA_SLAVE_SDHI0_TX,
 	.dma_slave_rx	= SHDMA_SLAVE_SDHI0_RX,
 	.tmio_caps	= MMC_CAP_SD_HIGHSPEED | MMC_CAP_SDIO_IRQ,
-	.tmio_ocr_mask	= MMC_VDD_165_195 | MMC_VDD_32_33 | MMC_VDD_33_34,
 	.tmio_flags	= TMIO_MMC_HAS_IDLE_WAIT | TMIO_MMC_USE_GPIO_CD,
 	.cd_gpio	= GPIO_PORT167,
 };
@@ -622,7 +700,6 @@ static struct sh_mobile_sdhi_info sdhi1_info = {
 	.dma_slave_tx	= SHDMA_SLAVE_SDHI1_TX,
 	.dma_slave_rx	= SHDMA_SLAVE_SDHI1_RX,
 	.tmio_caps	= MMC_CAP_SD_HIGHSPEED | MMC_CAP_SDIO_IRQ,
-	.tmio_ocr_mask	= MMC_VDD_165_195 | MMC_VDD_32_33 | MMC_VDD_33_34,
 	.tmio_flags	= TMIO_MMC_HAS_IDLE_WAIT | TMIO_MMC_USE_GPIO_CD,
 	/* Port72 cannot generate IRQs, will be used in polling mode. */
 	.cd_gpio	= GPIO_PORT72,
@@ -673,7 +750,6 @@ static const struct pinctrl_map eva_sdhi1_pinctrl_map[] = {
 /* MMCIF */
 static struct sh_mmcif_plat_data sh_mmcif_plat = {
 	.sup_pclk	= 0,
-	.ocr		= MMC_VDD_165_195 | MMC_VDD_32_33 | MMC_VDD_33_34,
 	.caps		= MMC_CAP_4_BIT_DATA |
 			  MMC_CAP_8_BIT_DATA |
 			  MMC_CAP_NONREMOVABLE,
@@ -926,6 +1002,8 @@ static struct platform_device *eva_devices[] __initdata = {
 	&fsi_wm8978_device,
 	&fsi_hdmi_device,
 	&i2c_gpio_device,
+	&vcc_sdhi0,
+	&vccq_sdhi0,
 };
 
 static const struct pinctrl_map eva_pinctrl_map[] = {
@@ -1060,13 +1138,6 @@ static void __init eva_init(void)
 		usb = &usbhsf_device;
 	}
 
-	/* SDHI0 */
-	gpio_request_one(17, GPIOF_OUT_INIT_LOW, NULL);  /* SDHI0_18/33_B */
-	gpio_request_one(74, GPIOF_OUT_INIT_HIGH, NULL); /* SDHI0_PON */
-	gpio_request_one(75, GPIOF_OUT_INIT_HIGH, NULL); /* SDSLOT1_PON */
-
-	/* we can use GPIO_FN_IRQ31_PORT167 here for SDHI0 CD irq */
-
 	/* CEU0 */
 	gpio_request(GPIO_FN_VIO0_D7,		NULL);
 	gpio_request(GPIO_FN_VIO0_D6,		NULL);