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armv8/ls2080a: configure PMU's PCTBENR to enable WDT

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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>
This commit is contained in:
Yunhui Cui 2016-06-08 10:31:42 +08:00 committed by York Sun
parent 6b3943f1b0
commit a758177f9b
2 changed files with 13 additions and 0 deletions
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12
arch/arm/cpu/armv8/fsl-layerscape/cpu.c
View file

@ -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.
*/

1
arch/arm/include/asm/arch-fsl-layerscape/immap_lsch3.h
View file

@ -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)