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authorRobin Gong <b38343@freescale.com>2014-11-04 19:18:56 +0800
committerRobin Gong <b38343@freescale.com>2014-11-11 11:25:08 +0800
commitb34b40e4918ced6792ea5f4b588bf394570e75cc (patch)
treefdeedfaec463d69691d2e3e4f9a8fc194b67a238
parent4168bfe6940ede34e87fe61ed670310a91e20301 (diff)
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MLK-9819: ARM: mx6sx: clear WDOG3 Power Down Enable bit for i.mx6sx
Since we use WDOG_B reset now, we have to clear WDOG3 Power Down Enable bit to avoid system reboot during normal kernel boot. For mx6sxsabresd board, we have to make sure pad setting for WDOG_B ready before mux ready, otherwise also cause reboot. But that dependes on hardware design, only need on mx6sxsabresd board. Signed-off-by: Robin Gong <b38343@freescale.com> (cherry picked from commit 26875f93ac7e84748fa63e5f0dd948d12e663e43)
-rw-r--r--arch/arm/cpu/armv7/mx6/soc.c4
-rw-r--r--board/freescale/mx6sxsabresd/mx6sxsabresd.c15
2 files changed, 19 insertions, 0 deletions
diff --git a/arch/arm/cpu/armv7/mx6/soc.c b/arch/arm/cpu/armv7/mx6/soc.c
index d7c109e..01776a6 100644
--- a/arch/arm/cpu/armv7/mx6/soc.c
+++ b/arch/arm/cpu/armv7/mx6/soc.c
@@ -228,6 +228,10 @@ static void imx_set_wdog_powerdown(bool enable)
{
struct wdog_regs *wdog1 = (struct wdog_regs *)WDOG1_BASE_ADDR;
struct wdog_regs *wdog2 = (struct wdog_regs *)WDOG2_BASE_ADDR;
+#ifdef CONFIG_MX6SX
+ struct wdog_regs *wdog3 = (struct wdog_regs *)WDOG3_BASE_ADDR;
+ writew(enable, &wdog3->wmcr);
+#endif
/* Write to the PDE (Power Down Enable) bit */
writew(enable, &wdog1->wmcr);
diff --git a/board/freescale/mx6sxsabresd/mx6sxsabresd.c b/board/freescale/mx6sxsabresd/mx6sxsabresd.c
index 1973bc0..b6a18f5 100644
--- a/board/freescale/mx6sxsabresd/mx6sxsabresd.c
+++ b/board/freescale/mx6sxsabresd/mx6sxsabresd.c
@@ -72,6 +72,8 @@ DECLARE_GLOBAL_DATA_PTR;
#define BUTTON_PAD_CTRL (PAD_CTL_PKE | PAD_CTL_PUE | \
PAD_CTL_PUS_22K_UP | PAD_CTL_DSE_40ohm)
+#define WDOG_PAD_CTRL (PAD_CTL_PUE | PAD_CTL_PKE | PAD_CTL_SPEED_MED | \
+ PAD_CTL_DSE_40ohm)
#ifdef CONFIG_SYS_I2C_MXC
#define PC MUX_PAD_CTRL(I2C_PAD_CTRL)
@@ -175,6 +177,10 @@ static iomux_v3_cfg_t const peri_3v3_pads[] = {
MX6SX_PAD_QSPI1A_DATA0__GPIO4_IO_16 | MUX_PAD_CTRL(NO_PAD_CTRL),
};
+static iomux_v3_cfg_t const wdog_b_pad = {
+ MX6SX_PAD_GPIO1_IO13__GPIO1_IO_13 | MUX_PAD_CTRL(WDOG_PAD_CTRL),
+};
+
#ifdef CONFIG_FEC_MXC
static iomux_v3_cfg_t const fec1_pads[] = {
MX6SX_PAD_ENET1_MDC__ENET1_MDC | MUX_PAD_CTRL(ENET_PAD_CTRL),
@@ -865,6 +871,15 @@ int board_init(void)
/* Address of boot parameters */
gd->bd->bi_boot_params = PHYS_SDRAM + 0x100;
+ /*
+ * Because kernel set WDOG_B mux before pad with the commone pinctrl
+ * framwork now and wdog reset will be triggered once set WDOG_B mux
+ * with default pad setting, we set pad setting here to workaround this.
+ * Since imx_iomux_v3_setup_pad also set mux before pad setting, we set
+ * as GPIO mux firstly here to workaround it.
+ */
+ imx_iomux_v3_setup_pad(wdog_b_pad);
+
/* Enable PERI_3V3, which is used by SD2, ENET, LVDS, BT */
imx_iomux_v3_setup_multiple_pads(peri_3v3_pads, ARRAY_SIZE(peri_3v3_pads));