davinci: add spi devices on tnetv107x evm

This patch adds definitions for spi devices on the tnetv107x evm platform.

Signed-off-by: Cyril Chemparathy <cyril@ti.com>
Signed-off-by: Sekhar Nori <nsekhar@ti.com>
Signed-off-by: Kevin Hilman <khilman@ti.com>

1 files changed, 43 insertions, 0 deletions

diff --git a/arch/arm/mach-davinci/board-tnetv107x-evm.c b/arch/arm/mach-davinci/board-tnetv107x-evm.c
index ef526b184eaf..1a656e882262 100644
--- a/arch/arm/mach-davinci/board-tnetv107x-evm.c
+++ b/arch/arm/mach-davinci/board-tnetv107x-evm.c
@@ -25,6 +25,7 @@
 #include <linux/mtd/partitions.h>
 #include <linux/input.h>
 #include <linux/input/matrix_keypad.h>
+#include <linux/spi/spi.h>
 
 #include <asm/mach/arch.h>
 #include <asm/mach-types.h>
@@ -37,6 +38,7 @@
 
 #define EVM_MMC_WP_GPIO         21
 #define EVM_MMC_CD_GPIO         24
+#define EVM_SPI_CS_GPIO         54
 
 static int initialize_gpio(int gpio, char *desc)
 {
@@ -202,9 +204,45 @@ static struct matrix_keypad_platform_data keypad_config = {
         .no_autorepeat  = 0,
 };
 
+static void spi_select_device(int cs)
+{
+        static int gpio;
+
+        if (!gpio) {
+                int ret;
+                ret = gpio_request(EVM_SPI_CS_GPIO, "spi chipsel");
+                if (ret < 0) {
+                        pr_err("cannot open spi chipsel gpio\n");
+                        gpio = -ENOSYS;
+                        return;
+                } else {
+                        gpio = EVM_SPI_CS_GPIO;
+                        gpio_direction_output(gpio, 0);
+                }
+        }
+
+        if (gpio < 0)
+                return;
+
+        return gpio_set_value(gpio, cs ? 1 : 0);
+}
+
+static struct ti_ssp_spi_data spi_master_data = {
+        .num_cs = 2,
+        .select = spi_select_device,
+        .iosel  = SSP_PIN_SEL(0, SSP_CLOCK)     | SSP_PIN_SEL(1, SSP_DATA) |
+                  SSP_PIN_SEL(2, SSP_CHIPSEL)   | SSP_PIN_SEL(3, SSP_IN)   |
+                  SSP_INPUT_SEL(3),
+};
+
 static struct ti_ssp_data ssp_config = {
         .out_clock      = 250 * 1000,
         .dev_data       = {
+                [1] = {
+                        .dev_name = "ti-ssp-spi",
+                        .pdata = &spi_master_data,
+                        .pdata_size = sizeof(spi_master_data),
+                },
         },
 };
 
@@ -216,6 +254,9 @@ static struct tnetv107x_device_info evm_device_info __initconst = {
         .ssp_config             = &ssp_config,
 };
 
+static struct spi_board_info spi_info[] __initconst = {
+};
+
 static __init void tnetv107x_evm_board_init(void)
 {
         davinci_cfg_reg_list(sdio1_pins);
@@ -223,6 +264,8 @@ static __init void tnetv107x_evm_board_init(void)
         davinci_cfg_reg_list(ssp_pins);
 
         tnetv107x_devices_init(&evm_device_info);
+
+        spi_register_board_info(spi_info, ARRAY_SIZE(spi_info));
 }
 
 #ifdef CONFIG_SERIAL_8250_CONSOLE