msm: msm_dsps: Disable the DSPS watchdog before shutdown
The DSPS watchdog timer continues counting even after
the DSPS is shutdown. This may cause a spurious watchdog
interrupt after the DSPS is powered up, before the software
running on the processor can re-init the watchdog. Disable
the watchdog before shutting down the watchdog.
Change-Id: I169e690b82ae05617e096ac832d757a110f673a4
Signed-off-by: Vikram Mulukutla <markivx@codeaurora.org>
(cherry picked from commit c84f66e2f518dcb9f0931a5a1b65bc770ee23d13)
Signed-off-by: Sudhir Sharma <sudsha@codeaurora.org>
(cherry picked from commit c9b48441a43985671779dc247356cb1313573722)
diff --git a/arch/arm/mach-msm/devices-8064.c b/arch/arm/mach-msm/devices-8064.c
index d029c36..81ba068 100644
--- a/arch/arm/mach-msm/devices-8064.c
+++ b/arch/arm/mach-msm/devices-8064.c
@@ -2312,17 +2312,18 @@
/* Sensors DSPS platform data */
-#define PPSS_DSPS_TCM_CODE_BASE 0x12000000
-#define PPSS_DSPS_TCM_CODE_SIZE 0x28000
-#define PPSS_DSPS_TCM_BUF_BASE 0x12040000
-#define PPSS_DSPS_TCM_BUF_SIZE 0x4000
-#define PPSS_DSPS_PIPE_BASE 0x12800000
-#define PPSS_DSPS_PIPE_SIZE 0x4000
-#define PPSS_DSPS_DDR_BASE 0x8fe00000
-#define PPSS_DSPS_DDR_SIZE 0x100000
-#define PPSS_SMEM_BASE 0x80000000
-#define PPSS_SMEM_SIZE 0x200000
-#define PPSS_REG_PHYS_BASE 0x12080000
+#define PPSS_DSPS_TCM_CODE_BASE 0x12000000
+#define PPSS_DSPS_TCM_CODE_SIZE 0x28000
+#define PPSS_DSPS_TCM_BUF_BASE 0x12040000
+#define PPSS_DSPS_TCM_BUF_SIZE 0x4000
+#define PPSS_DSPS_PIPE_BASE 0x12800000
+#define PPSS_DSPS_PIPE_SIZE 0x4000
+#define PPSS_DSPS_DDR_BASE 0x8fe00000
+#define PPSS_DSPS_DDR_SIZE 0x100000
+#define PPSS_SMEM_BASE 0x80000000
+#define PPSS_SMEM_SIZE 0x200000
+#define PPSS_REG_PHYS_BASE 0x12080000
+#define PPSS_WDOG_UNMASKED_INT_EN 0x1808
static struct dsps_clk_info dsps_clks[] = {};
static struct dsps_regulator_info dsps_regs[] = {};
@@ -2350,6 +2351,7 @@
.ddr_size = PPSS_DSPS_DDR_SIZE,
.smem_start = PPSS_SMEM_BASE,
.smem_size = PPSS_SMEM_SIZE,
+ .ppss_wdog_unmasked_int_en_reg = PPSS_WDOG_UNMASKED_INT_EN,
.signature = DSPS_SIGNATURE,
};
diff --git a/arch/arm/mach-msm/devices-8960.c b/arch/arm/mach-msm/devices-8960.c
index 109aa7c8..7f4d1e3 100644
--- a/arch/arm/mach-msm/devices-8960.c
+++ b/arch/arm/mach-msm/devices-8960.c
@@ -3736,17 +3736,18 @@
/* Sensors DSPS platform data */
#ifdef CONFIG_MSM_DSPS
-#define PPSS_DSPS_TCM_CODE_BASE 0x12000000
-#define PPSS_DSPS_TCM_CODE_SIZE 0x28000
-#define PPSS_DSPS_TCM_BUF_BASE 0x12040000
-#define PPSS_DSPS_TCM_BUF_SIZE 0x4000
-#define PPSS_DSPS_PIPE_BASE 0x12800000
-#define PPSS_DSPS_PIPE_SIZE 0x4000
-#define PPSS_DSPS_DDR_BASE 0x8fe00000
-#define PPSS_DSPS_DDR_SIZE 0x100000
-#define PPSS_SMEM_BASE 0x80000000
-#define PPSS_SMEM_SIZE 0x200000
-#define PPSS_REG_PHYS_BASE 0x12080000
+#define PPSS_DSPS_TCM_CODE_BASE 0x12000000
+#define PPSS_DSPS_TCM_CODE_SIZE 0x28000
+#define PPSS_DSPS_TCM_BUF_BASE 0x12040000
+#define PPSS_DSPS_TCM_BUF_SIZE 0x4000
+#define PPSS_DSPS_PIPE_BASE 0x12800000
+#define PPSS_DSPS_PIPE_SIZE 0x4000
+#define PPSS_DSPS_DDR_BASE 0x8fe00000
+#define PPSS_DSPS_DDR_SIZE 0x100000
+#define PPSS_SMEM_BASE 0x80000000
+#define PPSS_SMEM_SIZE 0x200000
+#define PPSS_REG_PHYS_BASE 0x12080000
+#define PPSS_WDOG_UNMASKED_INT_EN 0x1808
static struct dsps_clk_info dsps_clks[] = {};
static struct dsps_regulator_info dsps_regs[] = {};
@@ -3774,6 +3775,7 @@
.ddr_size = PPSS_DSPS_DDR_SIZE,
.smem_start = PPSS_SMEM_BASE,
.smem_size = PPSS_SMEM_SIZE,
+ .ppss_wdog_unmasked_int_en_reg = PPSS_WDOG_UNMASKED_INT_EN,
.signature = DSPS_SIGNATURE,
};
diff --git a/arch/arm/mach-msm/include/mach/msm_dsps.h b/arch/arm/mach-msm/include/mach/msm_dsps.h
index 0f9dba6..a876798 100644
--- a/arch/arm/mach-msm/include/mach/msm_dsps.h
+++ b/arch/arm/mach-msm/include/mach/msm_dsps.h
@@ -86,6 +86,7 @@
* @smem_start - start of the smem region as physical address
* @smem_size - size of the smem region in bytes
* @ppss_pause_reg - Offset to the PPSS_PAUSE register
+ * @ppss_wdog_unmasked_int_en_reg - Offset to PPSS_WDOG_UNMASKED_INT_EN register
* @signature - signature for validity check.
*/
struct msm_dsps_platform_data {
@@ -109,6 +110,7 @@
int smem_start;
int smem_size;
int ppss_pause_reg;
+ int ppss_wdog_unmasked_int_en_reg;
u32 signature;
};
diff --git a/arch/arm/mach-msm/msm_dsps.c b/arch/arm/mach-msm/msm_dsps.c
index 6dde576..c39829b 100644
--- a/arch/arm/mach-msm/msm_dsps.c
+++ b/arch/arm/mach-msm/msm_dsps.c
@@ -45,7 +45,7 @@
#include "timer.h"
#define DRV_NAME "msm_dsps"
-#define DRV_VERSION "4.02"
+#define DRV_VERSION "4.03"
#define PPSS_TIMER0_32KHZ_REG 0x1004
@@ -771,6 +771,11 @@
{
pr_debug("%s\n", __func__);
disable_irq_nosync(drv->wdog_irq);
+ if (drv->pdata->ppss_wdog_unmasked_int_en_reg) {
+ writel_relaxed(0, (drv->ppss_base+
+ drv->pdata->ppss_wdog_unmasked_int_en_reg));
+ mb(); /* Make sure wdog is disabled before shutting down */
+ }
pil_force_shutdown(drv->pdata->pil_name);
dsps_power_off_handler();
return 0;
@@ -799,6 +804,7 @@
static void dsps_crash_shutdown(const struct subsys_desc *subsys)
{
pr_debug("%s\n", __func__);
+ disable_irq_nosync(drv->wdog_irq);
dsps_crash_shutdown_g = 1;
smsm_change_state(SMSM_DSPS_STATE, SMSM_RESET, SMSM_RESET);
}