[PATCH v4] ARM: mxs/mx28evk: add mmc device

[Shawn Guo]

Signed-off-by: Shawn Guo <shawn.guo at freescale.com>
---
 arch/arm/mach-mxs/Kconfig        |    1 +
 arch/arm/mach-mxs/mach-mx28evk.c |   96 +++++++++++++++++++++++++++++++++++++-
 2 files changed, 95 insertions(+), 2 deletions(-)

diff --git a/arch/arm/mach-mxs/Kconfig b/arch/arm/mach-mxs/Kconfig
index f47fae3..287e0f8 100644
--- a/arch/arm/mach-mxs/Kconfig
+++ b/arch/arm/mach-mxs/Kconfig
@@ -30,6 +30,7 @@ config MACH_MX28EVK
 	select SOC_IMX28
 	select MXS_HAVE_AMBA_DUART
 	select MXS_HAVE_PLATFORM_FEC
+	select MXS_HAVE_PLATFORM_MMC
 	select MXS_OCOTP
 	default y
 	help
diff --git a/arch/arm/mach-mxs/mach-mx28evk.c b/arch/arm/mach-mxs/mach-mx28evk.c
index e8db99f..d5fb2f3 100644
--- a/arch/arm/mach-mxs/mach-mx28evk.c
+++ b/arch/arm/mach-mxs/mach-mx28evk.c
@@ -28,8 +28,13 @@
 #include "devices-mx28.h"
 #include "gpio.h"
 
-#define MX28EVK_FEC_PHY_POWER	MXS_GPIO_NR(2, 15)
-#define MX28EVK_FEC_PHY_RESET	MXS_GPIO_NR(4, 13)
+#define MX28EVK_FEC_PHY_POWER		MXS_GPIO_NR(2, 15)
+#define MX28EVK_FEC_PHY_RESET		MXS_GPIO_NR(4, 13)
+
+#define MX28EVK_MMC0_WRITE_PROTECT	MXS_GPIO_NR(2, 12)
+#define MX28EVK_MMC1_WRITE_PROTECT	MXS_GPIO_NR(0, 28)
+#define MX28EVK_MMC0_SLOT_POWER		MXS_GPIO_NR(3, 28)
+#define MX28EVK_MMC1_SLOT_POWER		MXS_GPIO_NR(3, 29)
 
 static const iomux_cfg_t mx28evk_pads[] __initconst = {
 	/* duart */
@@ -76,6 +81,66 @@ static const iomux_cfg_t mx28evk_pads[] __initconst = {
 	/* phy reset line */
 	MX28_PAD_ENET0_RX_CLK__GPIO_4_13 |
 		(MXS_PAD_4MA | MXS_PAD_3V3 | MXS_PAD_NOPULL),
+
+	/* mmc0 */
+	MX28_PAD_SSP0_DATA0__SSP0_D0 |
+		(MXS_PAD_8MA | MXS_PAD_3V3 | MXS_PAD_PULLUP),
+	MX28_PAD_SSP0_DATA1__SSP0_D1 |
+		(MXS_PAD_8MA | MXS_PAD_3V3 | MXS_PAD_PULLUP),
+	MX28_PAD_SSP0_DATA2__SSP0_D2 |
+		(MXS_PAD_8MA | MXS_PAD_3V3 | MXS_PAD_PULLUP),
+	MX28_PAD_SSP0_DATA3__SSP0_D3 |
+		(MXS_PAD_8MA | MXS_PAD_3V3 | MXS_PAD_PULLUP),
+	MX28_PAD_SSP0_DATA4__SSP0_D4 |
+		(MXS_PAD_8MA | MXS_PAD_3V3 | MXS_PAD_PULLUP),
+	MX28_PAD_SSP0_DATA5__SSP0_D5 |
+		(MXS_PAD_8MA | MXS_PAD_3V3 | MXS_PAD_PULLUP),
+	MX28_PAD_SSP0_DATA6__SSP0_D6 |
+		(MXS_PAD_8MA | MXS_PAD_3V3 | MXS_PAD_PULLUP),
+	MX28_PAD_SSP0_DATA7__SSP0_D7 |
+		(MXS_PAD_8MA | MXS_PAD_3V3 | MXS_PAD_PULLUP),
+	MX28_PAD_SSP0_CMD__SSP0_CMD |
+		(MXS_PAD_8MA | MXS_PAD_3V3 | MXS_PAD_PULLUP),
+	MX28_PAD_SSP0_DETECT__SSP0_CARD_DETECT |
+		(MXS_PAD_8MA | MXS_PAD_3V3 | MXS_PAD_NOPULL),
+	MX28_PAD_SSP0_SCK__SSP0_SCK |
+		(MXS_PAD_12MA | MXS_PAD_3V3 | MXS_PAD_NOPULL),
+	/* write protect */
+	MX28_PAD_SSP1_SCK__GPIO_2_12 |
+		(MXS_PAD_4MA | MXS_PAD_3V3 | MXS_PAD_NOPULL),
+	/* slot power enable */
+	MX28_PAD_PWM3__GPIO_3_28 |
+		(MXS_PAD_4MA | MXS_PAD_3V3 | MXS_PAD_NOPULL),
+
+	/* mmc1 */
+	MX28_PAD_GPMI_D00__SSP1_D0 |
+		(MXS_PAD_8MA | MXS_PAD_3V3 | MXS_PAD_PULLUP),
+	MX28_PAD_GPMI_D01__SSP1_D1 |
+		(MXS_PAD_8MA | MXS_PAD_3V3 | MXS_PAD_PULLUP),
+	MX28_PAD_GPMI_D02__SSP1_D2 |
+		(MXS_PAD_8MA | MXS_PAD_3V3 | MXS_PAD_PULLUP),
+	MX28_PAD_GPMI_D03__SSP1_D3 |
+		(MXS_PAD_8MA | MXS_PAD_3V3 | MXS_PAD_PULLUP),
+	MX28_PAD_GPMI_D04__SSP1_D4 |
+		(MXS_PAD_8MA | MXS_PAD_3V3 | MXS_PAD_PULLUP),
+	MX28_PAD_GPMI_D05__SSP1_D5 |
+		(MXS_PAD_8MA | MXS_PAD_3V3 | MXS_PAD_PULLUP),
+	MX28_PAD_GPMI_D06__SSP1_D6 |
+		(MXS_PAD_8MA | MXS_PAD_3V3 | MXS_PAD_PULLUP),
+	MX28_PAD_GPMI_D07__SSP1_D7 |
+		(MXS_PAD_8MA | MXS_PAD_3V3 | MXS_PAD_PULLUP),
+	MX28_PAD_GPMI_RDY1__SSP1_CMD |
+		(MXS_PAD_8MA | MXS_PAD_3V3 | MXS_PAD_PULLUP),
+	MX28_PAD_GPMI_RDY0__SSP1_CARD_DETECT |
+		(MXS_PAD_8MA | MXS_PAD_3V3 | MXS_PAD_NOPULL),
+	MX28_PAD_GPMI_WRN__SSP1_SCK |
+		(MXS_PAD_12MA | MXS_PAD_3V3 | MXS_PAD_NOPULL),
+	/* write protect */
+	MX28_PAD_GPMI_RESETN__GPIO_0_28 |
+		(MXS_PAD_4MA | MXS_PAD_3V3 | MXS_PAD_NOPULL),
+	/* slot power enable */
+	MX28_PAD_PWM4__GPIO_3_29 |
+		(MXS_PAD_4MA | MXS_PAD_3V3 | MXS_PAD_NOPULL),
 };
 
 /* fec */
@@ -159,12 +224,39 @@ error:
 	return -ETIMEDOUT;
 }
 
+static struct mxs_mmc_platform_data mx28evk_mmc_pdata[] __initdata = {
+	{
+		/* mmc0 */
+		.wp_gpio = MX28EVK_MMC0_WRITE_PROTECT,
+		.flags = SLOTF_8_BIT_CAPABLE,
+	}, {
+		/* mmc1 */
+		.wp_gpio = MX28EVK_MMC1_WRITE_PROTECT,
+		.flags = SLOTF_8_BIT_CAPABLE,
+	},
+};
+
 static void __init mx28evk_init(void)
 {
+	int ret;
+
 	mxs_iomux_setup_multiple_pads(mx28evk_pads, ARRAY_SIZE(mx28evk_pads));
 
 	mx28_add_duart();
 
+	/* power on mmc slot by writing 0 to the gpio */
+	ret = gpio_request_one(MX28EVK_MMC0_SLOT_POWER, GPIOF_DIR_OUT,
+			       "mmc0-slot-power");
+	if (ret)
+		pr_warn("failed to request gpio mmc0-slot-power: %d\n", ret);
+	mx28_add_mmc(0, &mx28evk_mmc_pdata[0]);
+
+	ret = gpio_request_one(MX28EVK_MMC1_SLOT_POWER, GPIOF_DIR_OUT,
+			       "mmc1-slot-power");
+	if (ret)
+		pr_warn("failed to request gpio mmc1-slot-power: %d\n", ret);
+	mx28_add_mmc(1, &mx28evk_mmc_pdata[1]);
+
 	if (mx28evk_fec_get_mac())
 		pr_warn("%s: failed on fec mac setup\n", __func__);
 
-- 
1.7.1