armv8/ls2080a: configure PMU's PCTBENR to enable WDT
The SP805-WDT module on LS2080A requires configuration of PMU's
PCTBENR register to enable watchdog counter decrement and reset
signal generation. The watchdog clock needs to be enabled first.
Signed-off-by: Yunhui Cui <yunhui.cui@nxp.com>
Reviewed-by: York Sun <york.sun@nxp.com>
diff --git a/arch/arm/cpu/armv8/fsl-layerscape/cpu.c b/arch/arm/cpu/armv8/fsl-layerscape/cpu.c
index 9a5a6b5..297687d 100644
--- a/arch/arm/cpu/armv8/fsl-layerscape/cpu.c
+++ b/arch/arm/cpu/armv8/fsl-layerscape/cpu.c
@@ -636,6 +636,9 @@
#ifdef CONFIG_FSL_LSCH3
u32 __iomem *cltbenr = (u32 *)CONFIG_SYS_FSL_PMU_CLTBENR;
#endif
+#ifdef CONFIG_LS2080A
+ u32 __iomem *pctbenr = (u32 *)FSL_PMU_PCTBENR_OFFSET;
+#endif
#ifdef COUNTER_FREQUENCY_REAL
unsigned long cntfrq = COUNTER_FREQUENCY_REAL;
@@ -650,6 +653,15 @@
out_le32(cltbenr, 0xf);
#endif
+#ifdef CONFIG_LS2080A
+ /*
+ * In certain Layerscape SoCs, the clock for each core's
+ * has an enable bit in the PMU Physical Core Time Base Enable
+ * Register (PCTBENR), which allows the watchdog to operate.
+ */
+ setbits_le32(pctbenr, 0xff);
+#endif
+
/* Enable clock for timer
* This is a global setting.
*/
diff --git a/arch/arm/include/asm/arch-fsl-layerscape/immap_lsch3.h b/arch/arm/include/asm/arch-fsl-layerscape/immap_lsch3.h
index 65b3357..c6b9f13 100644
--- a/arch/arm/include/asm/arch-fsl-layerscape/immap_lsch3.h
+++ b/arch/arm/include/asm/arch-fsl-layerscape/immap_lsch3.h
@@ -26,6 +26,7 @@
#define CONFIG_SYS_FSL_TIMER_ADDR 0x023d0000
#define CONFIG_SYS_FSL_PMU_CLTBENR (CONFIG_SYS_FSL_PMU_ADDR + \
0x18A0)
+#define FSL_PMU_PCTBENR_OFFSET (CONFIG_SYS_FSL_PMU_ADDR + 0x8A0)
#define CONFIG_SYS_FSL_WRIOP1_ADDR (CONFIG_SYS_IMMR + 0x7B80000)
#define CONFIG_SYS_FSL_WRIOP1_MDIO1 (CONFIG_SYS_FSL_WRIOP1_ADDR + 0x16000)