efikamx: add reset

The efikamx board is using a gpio to reset the board so add support
for it

Signed-off-by: Arnaud Patard <arnaud.patard@rtp-net.org>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

1 files changed, 24 insertions, 0 deletions

diff --git a/arch/arm/mach-mx5/board-mx51_efikamx.c b/arch/arm/mach-mx5/board-mx51_efikamx.c
index f84452f8ef74..4b2718b3e517 100644
--- a/arch/arm/mach-mx5/board-mx51_efikamx.c
+++ b/arch/arm/mach-mx5/board-mx51_efikamx.c
@@ -56,6 +56,10 @@
 #define EFIKAMX_SPI_CS0         (3*32 + 24)
 #define EFIKAMX_SPI_CS1         (3*32 + 25)
 
+/* board 1.1 doesn't have same reset gpio */
+#define EFIKAMX_RESET1_1        (2*32 + 2)
+#define EFIKAMX_RESET           (0*32 + 4)
+
 /* the pci ids pin have pull up. they're driven low according to board id */
 #define MX51_PAD_PCBID0 IOMUX_PAD(0x518, 0x130, 3, 0x0,   0, PAD_CTL_PUS_100K_UP)
 #define MX51_PAD_PCBID1 IOMUX_PAD(0x51C, 0x134, 3, 0x0,   0, PAD_CTL_PUS_100K_UP)
@@ -110,6 +114,10 @@ static iomux_v3_cfg_t mx51efikamx_pads[] = {
         MX51_PAD_CSPI1_SS1__GPIO_4_25,
         MX51_PAD_CSPI1_RDY__ECSPI1_RDY,
         MX51_PAD_CSPI1_SCLK__ECSPI1_SCLK,
+
+        /* reset */
+        MX51_PAD_DI1_PIN13__GPIO_3_2,
+        MX51_PAD_GPIO_1_4__GPIO_1_4,
 };
 
 /* Serial ports */
@@ -296,6 +304,14 @@ static const struct spi_imx_master mx51_efikamx_spi_pdata __initconst = {
         .num_chipselect = ARRAY_SIZE(mx51_efikamx_spi_cs),
 };
 
+void mx51_efikamx_reset(void)
+{
+        if (system_rev == 0x11)
+                gpio_direction_output(EFIKAMX_RESET1_1, 0);
+        else
+                gpio_direction_output(EFIKAMX_RESET, 0);
+}
+
 static void __init mxc_board_init(void)
 {
         mxc_iomux_v3_setup_multiple_pads(mx51efikamx_pads,
@@ -317,6 +333,14 @@ static void __init mxc_board_init(void)
         spi_register_board_info(mx51_efikamx_spi_board_info,
                 ARRAY_SIZE(mx51_efikamx_spi_board_info));
         imx51_add_ecspi(0, &mx51_efikamx_spi_pdata);
+
+        if (system_rev == 0x11) {
+                gpio_request(EFIKAMX_RESET1_1, "reset");
+                gpio_direction_output(EFIKAMX_RESET1_1, 1);
+        } else {
+                gpio_request(EFIKAMX_RESET, "reset");
+                gpio_direction_output(EFIKAMX_RESET, 1);
+        }
 }
 
 static void __init mx51_efikamx_timer_init(void)