[PATCH RESEND v3 3/3] Watchdog: Omap: get the bootstatus for OMAP34xx

Zumeng Chen zumeng.chen at windriver.com
Sun Jul 15 03:44:06 EDT 2012

The offset of WKUP_MOD is not right for the PRM_RSTST of OMAP3. So here
put the right one to match to the actual physical addr 0x48307258, which
defined in PRCM Registers section named as Global_Reg_PRM.

And there is a MPU_WD_RST bit in PRM_RSTST(0x48307258) holding the signal
from omap-wdt reboot, so that we can return WDIOF_CARDRESET if the board
wakes up from omap-wdt reboot for WDIOC_GETBOOTSTATUS ioctl.

Signed-off-by: Zumeng Chen <zumeng.chen at windriver.com>
 arch/arm/mach-omap2/prcm.c |    9 +++++++--
 1 files changed, 7 insertions(+), 2 deletions(-)

diff --git a/arch/arm/mach-omap2/prcm.c b/arch/arm/mach-omap2/prcm.c
index 480f40a..3ca8aa7 100644
--- a/arch/arm/mach-omap2/prcm.c
+++ b/arch/arm/mach-omap2/prcm.c
@@ -48,9 +48,14 @@ void __iomem *prcm_mpu_base;
 u32 omap_prcm_get_reset_sources(void)
-	/* XXX This presumably needs modification for 34XX */
-	if (cpu_is_omap24xx() || cpu_is_omap34xx())
+	if (cpu_is_omap24xx())
 		return omap2_prm_read_mod_reg(WKUP_MOD, OMAP2_RM_RSTST) & 0x7f;
+	/* XXX This presumably needs modification for AM33XX when ready. */
+	if (cpu_is_omap34xx())
+		return omap2_prm_read_mod_reg(OMAP3430_GR_MOD, OMAP2_RM_RSTST) &
+		       0x7f;
 	if (cpu_is_omap44xx())
 		return omap2_prm_read_mod_reg(WKUP_MOD, OMAP4_RM_RSTST) & 0x7f;

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