davinci: Add NOR flash support for da850/omap-l138

This patch adds platform data for the 8MB NOR flash
found on da850/omap-l138 EVM. Both NOR and NAND can
co-exist on da850/omap-l138 as they are using different
chip selects.

Signed-off-by: Sudhakar Rajashekhara <sudhakar.raj@ti.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>

1 files changed, 59 insertions, 0 deletions

diff --git a/arch/arm/mach-davinci/board-da850-evm.c b/arch/arm/mach-davinci/board-da850-evm.c
index 62d37cb6f29d..70a2f487da95 100644
--- a/arch/arm/mach-davinci/board-da850-evm.c
+++ b/arch/arm/mach-davinci/board-da850-evm.c
@@ -22,6 +22,7 @@
 #include <linux/mtd/mtd.h>
 #include <linux/mtd/nand.h>
 #include <linux/mtd/partitions.h>
+#include <linux/mtd/physmap.h>
 
 #include <asm/mach-types.h>
 #include <asm/mach/arch.h>
@@ -41,6 +42,39 @@
 #define DA850_MMCSD_CD_PIN              GPIO_TO_PIN(4, 0)
 #define DA850_MMCSD_WP_PIN              GPIO_TO_PIN(4, 1)
 
+static struct mtd_partition da850_evm_norflash_partition[] = {
+        {
+                .name           = "NOR filesystem",
+                .offset         = 0,
+                .size           = MTDPART_SIZ_FULL,
+                .mask_flags     = 0,
+        },
+};
+
+static struct physmap_flash_data da850_evm_norflash_data = {
+        .width          = 2,
+        .parts          = da850_evm_norflash_partition,
+        .nr_parts       = ARRAY_SIZE(da850_evm_norflash_partition),
+};
+
+static struct resource da850_evm_norflash_resource[] = {
+        {
+                .start  = DA8XX_AEMIF_CS2_BASE,
+                .end    = DA8XX_AEMIF_CS2_BASE + SZ_32M - 1,
+                .flags  = IORESOURCE_MEM,
+        },
+};
+
+static struct platform_device da850_evm_norflash_device = {
+        .name           = "physmap-flash",
+        .id             = 0,
+        .dev            = {
+                .platform_data  = &da850_evm_norflash_data,
+        },
+        .num_resources  = 1,
+        .resource       = da850_evm_norflash_resource,
+};
+
 /* DA850/OMAP-L138 EVM includes a 512 MByte large-page NAND flash
  * (128K blocks). It may be used instead of the (default) SPI flash
  * to boot, using TI's tools to install the secondary boot loader
@@ -120,6 +154,7 @@ static struct davinci_uart_config da850_evm_uart_config __initdata = {
 
 static struct platform_device *da850_evm_devices[] __initdata = {
         &da850_evm_nandflash_device,
+        &da850_evm_norflash_device,
 };
 
 /* davinci da850 evm audio machine driver */
@@ -192,6 +227,23 @@ static int da850_lcd_hw_init(void)
         return 0;
 }
 
+#define DA8XX_AEMIF_CE2CFG_OFFSET       0x10
+#define DA8XX_AEMIF_ASIZE_16BIT         0x1
+
+static void __init da850_evm_init_nor(void)
+{
+        void __iomem *aemif_addr;
+
+        aemif_addr = ioremap(DA8XX_AEMIF_CTL_BASE, SZ_32K);
+
+        /* Configure data bus width of CS2 to 16 bit */
+        writel(readl(aemif_addr + DA8XX_AEMIF_CE2CFG_OFFSET) |
+                DA8XX_AEMIF_ASIZE_16BIT,
+                aemif_addr + DA8XX_AEMIF_CE2CFG_OFFSET);
+
+        iounmap(aemif_addr);
+}
+
 static __init void da850_evm_init(void)
 {
         struct davinci_soc_info *soc_info = &davinci_soc_info;
@@ -202,6 +254,13 @@ static __init void da850_evm_init(void)
                 pr_warning("da850_evm_init: nand mux setup failed: %d\n",
                                 ret);
 
+        ret = da8xx_pinmux_setup(da850_nor_pins);
+        if (ret)
+                pr_warning("da850_evm_init: nor mux setup failed: %d\n",
+                                ret);
+
+        da850_evm_init_nor();
+
         platform_add_devices(da850_evm_devices,
                                 ARRAY_SIZE(da850_evm_devices));