mx31moboard: two GPIOS are used to reset other microcontrolers on the robot

Signed-off-by: Valentin Longchamp <valentin.longchamp@epfl.ch>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

1 files changed, 20 insertions, 0 deletions

diff --git a/arch/arm/mach-mx3/mx31moboard-marxbot.c b/arch/arm/mach-mx3/mx31moboard-marxbot.c
index 53ce7ff0637c..3e2b73051b94 100644
--- a/arch/arm/mach-mx3/mx31moboard-marxbot.c
+++ b/arch/arm/mach-mx3/mx31moboard-marxbot.c
@@ -47,6 +47,8 @@ static unsigned int marxbot_pins[] = {
         MX31_PIN_CSI_PIXCLK__CSI_PIXCLK, MX31_PIN_CSI_VSYNC__CSI_VSYNC,
         MX31_PIN_GPIO3_0__GPIO3_0, MX31_PIN_GPIO3_1__GPIO3_1,
         MX31_PIN_TXD2__GPIO1_28,
+        /* dsPIC resets */
+        MX31_PIN_STXD5__GPIO1_21, MX31_PIN_SRXD5__GPIO1_22,
 };
 
 #define SDHC2_CD IOMUX_TO_GPIO(MX31_PIN_ATA_DIOR)
@@ -102,6 +104,22 @@ static struct imxmmc_platform_data sdhc2_pdata = {
         .exit   = marxbot_sdhc2_exit,
 };
 
+#define TRSLAT_RST_B    IOMUX_TO_GPIO(MX31_PIN_STXD5)
+#define DSPICS_RST_B    IOMUX_TO_GPIO(MX31_PIN_SRXD5)
+
+static void dspics_resets_init(void)
+{
+        if (!gpio_request(TRSLAT_RST_B, "translator-rst")) {
+                gpio_direction_output(TRSLAT_RST_B, 1);
+                gpio_export(TRSLAT_RST_B, false);
+        }
+
+        if (!gpio_request(DSPICS_RST_B, "dspics-rst")) {
+                gpio_direction_output(DSPICS_RST_B, 1);
+                gpio_export(DSPICS_RST_B, false);
+        }
+}
+
 /*
  * system init for baseboard usage. Will be called by mx31moboard init.
  */
@@ -112,5 +130,7 @@ void __init mx31moboard_marxbot_init(void)
         mxc_iomux_setup_multiple_pins(marxbot_pins, ARRAY_SIZE(marxbot_pins),
                 "marxbot");
 
+        dspics_resets_init();
+
         mxc_register_device(&mxcsdhc_device1, &sdhc2_pdata);
 }