Blackfin arch: add mmc_spi support to BF537-STAMP

Signed-off-by: Yi Li <yi.li@analog.com>
Signed-off-by: Bryan Wu <cooloney@kernel.org>

1 files changed, 39 insertions, 0 deletions

diff --git a/arch/blackfin/mach-bf537/boards/stamp.c b/arch/blackfin/mach-bf537/boards/stamp.c
index 9b7b9f34767f..a5e8e5bc6496 100644
--- a/arch/blackfin/mach-bf537/boards/stamp.c
+++ b/arch/blackfin/mach-bf537/boards/stamp.c
@@ -46,6 +46,7 @@
 #include <linux/interrupt.h>
 #include <linux/i2c.h>
 #include <linux/usb/sl811.h>
+#include <linux/spi/mmc_spi.h>
 #include <asm/dma.h>
 #include <asm/bfin5xx_spi.h>
 #include <asm/reboot.h>
@@ -533,6 +534,33 @@ static struct bfin5xx_spi_chip spi_mmc_chip_info = {
 };
 #endif
 
+#if defined(CONFIG_MMC_SPI) || defined(CONFIG_MMC_SPI_MODULE)
+#define MMC_SPI_CARD_DETECT_INT IRQ_PF5
+
+static int bfin_mmc_spi_init(struct device *dev,
+        irqreturn_t (*detect_int)(int, void *), void *data)
+{
+        return request_irq(MMC_SPI_CARD_DETECT_INT, detect_int,
+                IRQF_TRIGGER_FALLING, "mmc-spi-detect", data);
+}
+
+static void bfin_mmc_spi_exit(struct device *dev, void *data)
+{
+        free_irq(MMC_SPI_CARD_DETECT_INT, data);
+}
+
+static struct mmc_spi_platform_data bfin_mmc_spi_pdata = {
+        .init = bfin_mmc_spi_init,
+        .exit = bfin_mmc_spi_exit,
+        .detect_delay = 100, /* msecs */
+};
+
+static struct bfin5xx_spi_chip  mmc_spi_chip_info = {
+        .enable_dma = 0,
+        .bits_per_word = 8,
+};
+#endif
+
 #if defined(CONFIG_PBX)
 static struct bfin5xx_spi_chip spi_si3xxx_chip_info = {
         .ctl_reg        = 0x4, /* send zero */
@@ -712,6 +740,17 @@ static struct spi_board_info bfin_spi_board_info[] __initdata = {
                 .mode = SPI_MODE_3,
         },
 #endif
+#if defined(CONFIG_MMC_SPI) || defined(CONFIG_MMC_SPI_MODULE)
+        {
+                .modalias = "mmc_spi",
+                .max_speed_hz = 20000000,     /* max spi clock (SCK) speed in HZ */
+                .bus_num = 0,
+                .chip_select = 4,
+                .platform_data = &bfin_mmc_spi_pdata,
+                .controller_data = &mmc_spi_chip_info,
+                .mode = SPI_MODE_3,
+        },
+#endif
 #if defined(CONFIG_PBX)
         {
                 .modalias = "fxs-spi",