davinci: add spi devices support for MityDSP-L138/MityARM-1808 platform

This patch adds support for accessing the on board SPI NOR FLASH
device for MityDSP-L138 and MityARM-1808 SoMs.

Signed-off-by: Michael Williamson <michael.williamson@criticallink.com>
Tested-by: Michael Williamson <michael.williamson@criticallink.com>
Acked-by: Sekhar Nori <nsekhar@ti.com>
Signed-off-by: Kevin Hilman <khilman@ti.com>

1 files changed, 84 insertions, 0 deletions

diff --git a/arch/arm/mach-davinci/board-mityomapl138.c b/arch/arm/mach-davinci/board-mityomapl138.c
index 0ea59327dc28..2aa79c54f98e 100644
--- a/arch/arm/mach-davinci/board-mityomapl138.c
+++ b/arch/arm/mach-davinci/board-mityomapl138.c
@@ -17,6 +17,8 @@
 #include <linux/i2c.h>
 #include <linux/i2c/at24.h>
 #include <linux/etherdevice.h>
+#include <linux/spi/spi.h>
+#include <linux/spi/flash.h>
 
 #include <asm/mach-types.h>
 #include <asm/mach/arch.h>
@@ -25,6 +27,7 @@
 #include <mach/da8xx.h>
 #include <mach/nand.h>
 #include <mach/mux.h>
+#include <mach/spi.h>
 
 #define MITYOMAPL138_PHY_ID             "0:03"
 
@@ -294,6 +297,82 @@ static int __init pmic_tps65023_init(void)
 }
 
 /*
+ * SPI Devices:
+ *      SPI1_CS0: 8M Flash ST-M25P64-VME6G
+ */
+static struct mtd_partition spi_flash_partitions[] = {
+        [0] = {
+                .name           = "ubl",
+                .offset         = 0,
+                .size           = SZ_64K,
+                .mask_flags     = MTD_WRITEABLE,
+        },
+        [1] = {
+                .name           = "u-boot",
+                .offset         = MTDPART_OFS_APPEND,
+                .size           = SZ_512K,
+                .mask_flags     = MTD_WRITEABLE,
+        },
+        [2] = {
+                .name           = "u-boot-env",
+                .offset         = MTDPART_OFS_APPEND,
+                .size           = SZ_64K,
+                .mask_flags     = MTD_WRITEABLE,
+        },
+        [3] = {
+                .name           = "periph-config",
+                .offset         = MTDPART_OFS_APPEND,
+                .size           = SZ_64K,
+                .mask_flags     = MTD_WRITEABLE,
+        },
+        [4] = {
+                .name           = "reserved",
+                .offset         = MTDPART_OFS_APPEND,
+                .size           = SZ_256K + SZ_64K,
+        },
+        [5] = {
+                .name           = "kernel",
+                .offset         = MTDPART_OFS_APPEND,
+                .size           = SZ_2M + SZ_1M,
+        },
+        [6] = {
+                .name           = "fpga",
+                .offset         = MTDPART_OFS_APPEND,
+                .size           = SZ_2M,
+        },
+        [7] = {
+                .name           = "spare",
+                .offset         = MTDPART_OFS_APPEND,
+                .size           = MTDPART_SIZ_FULL,
+        },
+};
+
+static struct flash_platform_data mityomapl138_spi_flash_data = {
+        .name           = "m25p80",
+        .parts          = spi_flash_partitions,
+        .nr_parts       = ARRAY_SIZE(spi_flash_partitions),
+        .type           = "m24p64",
+};
+
+static struct davinci_spi_config spi_eprom_config = {
+        .io_type        = SPI_IO_TYPE_DMA,
+        .c2tdelay       = 8,
+        .t2cdelay       = 8,
+};
+
+static struct spi_board_info mityomapl138_spi_flash_info[] = {
+        {
+                .modalias               = "m25p80",
+                .platform_data          = &mityomapl138_spi_flash_data,
+                .controller_data        = &spi_eprom_config,
+                .mode                   = SPI_MODE_0,
+                .max_speed_hz           = 30000000,
+                .bus_num                = 1,
+                .chip_select            = 0,
+        },
+};
+
+/*
  * MityDSP-L138 includes a 256 MByte large-page NAND flash
  * (128K blocks).
  */
@@ -448,6 +527,11 @@ static void __init mityomapl138_init(void)
 
         mityomapl138_setup_nand();
 
+        ret = da8xx_register_spi(1, mityomapl138_spi_flash_info,
+                               ARRAY_SIZE(mityomapl138_spi_flash_info));
+        if (ret)
+                pr_warning("spi 1 registration failed: %d\n", ret);
+
         mityomapl138_config_emac();
 
         ret = da8xx_register_rtc();