From a758177f9b9a567df2e8e6e57ac905ada24d8d9c Mon Sep 17 00:00:00 2001 From: Yunhui Cui Date: Wed, 8 Jun 2016 10:31:42 +0800 Subject: [PATCH] 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 Reviewed-by: York Sun --- arch/arm/cpu/armv8/fsl-layerscape/cpu.c | 12 ++++++++++++ .../include/asm/arch-fsl-layerscape/immap_lsch3.h | 1 + 2 files changed, 13 insertions(+) diff --git a/arch/arm/cpu/armv8/fsl-layerscape/cpu.c b/arch/arm/cpu/armv8/fsl-layerscape/cpu.c index 9a5a6b53f7..297687d3c6 100644 --- a/arch/arm/cpu/armv8/fsl-layerscape/cpu.c +++ b/arch/arm/cpu/armv8/fsl-layerscape/cpu.c @@ -636,6 +636,9 @@ int timer_init(void) #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 @@ int timer_init(void) 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 65b3357009..c6b9f1336b 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) -- 2.25.1