diff options
Diffstat (limited to 'cpu')
| -rw-r--r-- | cpu/arm_cortexa8/mx6/generic.c | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/cpu/arm_cortexa8/mx6/generic.c b/cpu/arm_cortexa8/mx6/generic.c index 47b9cd1..216308b 100644 --- a/cpu/arm_cortexa8/mx6/generic.c +++ b/cpu/arm_cortexa8/mx6/generic.c @@ -82,6 +82,8 @@ enum pll_clocks { #define NFC_CLK_MAX PLL2_FREQ_MAX #endif +#define SNVS_LPGPR_OFFSET 0x68 + static u32 __decode_pll(enum pll_clocks pll, u32 infreq) { u32 div; @@ -843,6 +845,29 @@ int cpu_eth_init(bd_t *bis) int arch_cpu_init(void) { int val; + unsigned int reg; + + /* Check the flag of SNVS_LPGPR[0], SRC register will not reset + when we do a wdog reset, so we keep flag in SNVS_LPGPR[0], + when we finish this workaround, we will clear it */ + reg = readl(SNVS_BASE_ADDR + SNVS_LPGPR_OFFSET); + /* If flagg is not set */ + if (!(reg & 0x1)) { + /* Set flag in SNVS_LPGPR[0] */ + writel(readl(SNVS_BASE_ADDR + SNVS_LPGPR_OFFSET) | 0x1, + SNVS_BASE_ADDR + SNVS_LPGPR_OFFSET); + /* Set wdog to timeout in 0.5 second */ + writew(0x34, WDOG1_BASE_ADDR); + /* Disable CORE LDO */ + writel(0x0, ANATOP_BASE_ADDR + HW_ANADIG_REG_CORE); + /* Wait for wdog timeout */ + while (1) + ; + } else { + /* Clear flag */ + writel(readl(SNVS_BASE_ADDR + SNVS_LPGPR_OFFSET) & (~0x1), + SNVS_BASE_ADDR + SNVS_LPGPR_OFFSET); + } icache_enable(); dcache_enable(); |