[PATCH] ARM: mmp2: support sdio with regulator vsdio

[Zhangfei Gao]

Add regulator vsdio, which controled by mmc core to handle sdio chip power

Test With CONFIG_PM_RUNTIME=y
8787 power is enabled if any client module over sdio is insmod, and disbled automatically after all client modules over sdio are rmmod
Also 8787 power could be controled by mmc_start/stop_host

Signed-off-by: Zhangfei Gao <zhangfei.gao at marvell.com>
---
 arch/arm/mach-mmp/brownstone.c |   60 ++++++++++++++++++++++++++++++++++++++-
 1 files changed, 58 insertions(+), 2 deletions(-)

diff --git a/arch/arm/mach-mmp/brownstone.c b/arch/arm/mach-mmp/brownstone.c
index c79162a..63315e2 100644
--- a/arch/arm/mach-mmp/brownstone.c
+++ b/arch/arm/mach-mmp/brownstone.c
@@ -89,6 +89,9 @@ static unsigned long brownstone_pin_config[] __initdata = {
 	GPIO41_MMC2_CMD | MFP_PULL_HIGH,
 	GPIO42_MMC2_CLK,
 
+	GPIO57_GPIO | MFP_LPM_DRIVE_HIGH | MFP_PULL_HIGH,
+	GPIO58_GPIO | MFP_LPM_DRIVE_HIGH | MFP_PULL_HIGH,
+
 	/* MMC2 */
 	GPIO165_MMC3_DAT7 | MFP_PULL_HIGH,
 	GPIO162_MMC3_DAT6 | MFP_PULL_HIGH,
@@ -180,12 +183,66 @@ static struct sdhci_pxa_platdata mmp2_sdh_platdata_mmc0 = {
 	.clk_delay_cycles = 0x1f,
 };
 
+static struct sdhci_pxa_platdata mmp2_sdh_platdata_mmc1 = {
+	.flags = PXA_FLAG_CARD_PERMANENT,
+};
+
 static struct sdhci_pxa_platdata mmp2_sdh_platdata_mmc2 = {
 	.clk_delay_cycles = 0x1f,
 	.flags = PXA_FLAG_CARD_PERMANENT
 		| PXA_FLAG_SD_8_BIT_CAPABLE_SLOT,
 };
 
+static struct regulator_consumer_supply sdio_power_supplies[] = {
+	REGULATOR_SUPPLY("vsdio", "sdhci-pxav3.1"),
+};
+
+static struct regulator_init_data sdio_power_data = {
+	.constraints	= {
+		.valid_ops_mask		= REGULATOR_CHANGE_STATUS,
+	},
+	.num_consumer_supplies	= ARRAY_SIZE(sdio_power_supplies),
+	.consumer_supplies	= sdio_power_supplies,
+};
+
+static struct fixed_voltage_config sdio_power = {
+	.supply_name		= "vsdio",
+	.microvolts		= 3000000,
+	.gpio			= mfp_to_gpio(MFP_PIN_GPIO57),
+	.enable_high		= 1,
+	.enabled_at_boot	= 0,
+	.init_data		= &sdio_power_data,
+};
+
+static struct platform_device sdio_power_device = {
+	.name		= "reg-fixed-voltage",
+	.id		= 2,
+	.dev = {
+		.platform_data = &sdio_power,
+	},
+};
+
+static int __init brownstone_init_mmc(void)
+{
+	/*
+	 * PDn: GPIO58; RESETn: GPIO57
+	 * 8787, RESETn keeps high, PDn control power
+	 * on: PDn 1; off: PDn 0;
+	 */
+	int RESETn = mfp_to_gpio(MFP_PIN_GPIO58);
+
+	if (gpio_request(RESETn, "sdio RESETn")) {
+		pr_err("Failed to request sdio RESETn gpio\n");
+		return -EIO;
+	}
+	gpio_direction_output(RESETn, 1);
+	gpio_free(RESETn);
+
+	platform_device_register(&sdio_power_device);
+	mmp2_add_sdhost(0, &mmp2_sdh_platdata_mmc0); /* SD/MMC */
+	mmp2_add_sdhost(1, &mmp2_sdh_platdata_mmc1); /* sdio */
+	mmp2_add_sdhost(2, &mmp2_sdh_platdata_mmc2); /* eMMC */
+}
 
 static void __init brownstone_init(void)
 {
@@ -195,8 +252,7 @@ static void __init brownstone_init(void)
 	mmp2_add_uart(1);
 	mmp2_add_uart(3);
 	mmp2_add_twsi(1, NULL, ARRAY_AND_SIZE(brownstone_twsi1_info));
-	mmp2_add_sdhost(0, &mmp2_sdh_platdata_mmc0); /* SD/MMC */
-	mmp2_add_sdhost(2, &mmp2_sdh_platdata_mmc2); /* eMMC */
+	brownstone_init_mmc();
 
 	/* enable 5v regulator */
 	platform_device_register(&brownstone_v_5vp_device);
-- 
1.6.0.4