diff options
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/arm/cpu/armv7/keystone/ddr3.c | 19 | ||||
| -rw-r--r-- | arch/arm/include/asm/arch-keystone/ddr3.h | 1 | ||||
| -rw-r--r-- | arch/arm/include/asm/arch-keystone/hardware.h | 2 |
3 files changed, 22 insertions, 0 deletions
diff --git a/arch/arm/cpu/armv7/keystone/ddr3.c b/arch/arm/cpu/armv7/keystone/ddr3.c index bb16551..b711b81 100644 --- a/arch/arm/cpu/armv7/keystone/ddr3.c +++ b/arch/arm/cpu/armv7/keystone/ddr3.c @@ -8,6 +8,7 @@ */ #include <asm/io.h> +#include <common.h> #include <asm/arch/ddr3.h> void ddr3_init_ddrphy(u32 base, struct ddr3_phy_config *phy_cfg) @@ -67,3 +68,21 @@ void ddr3_init_ddremif(u32 base, struct ddr3_emif_config *emif_cfg) __raw_writel(emif_cfg->zqcfg, base + KS2_DDR3_ZQCFG_OFFSET); __raw_writel(emif_cfg->sdrfc, base + KS2_DDR3_SDRFC_OFFSET); } + +void ddr3_reset_ddrphy(void) +{ + u32 tmp; + + /* Assert DDR3A PHY reset */ + tmp = readl(K2HK_DDR3APLLCTL1); + tmp |= KS2_DDR3_PLLCTRL_PHY_RESET; + writel(tmp, K2HK_DDR3APLLCTL1); + + /* wait 10us to catch the reset */ + udelay(10); + + /* Release DDR3A PHY reset */ + tmp = readl(K2HK_DDR3APLLCTL1); + tmp &= ~KS2_DDR3_PLLCTRL_PHY_RESET; + __raw_writel(tmp, K2HK_DDR3APLLCTL1); +} diff --git a/arch/arm/include/asm/arch-keystone/ddr3.h b/arch/arm/include/asm/arch-keystone/ddr3.h index 05b7e29..4d229a2 100644 --- a/arch/arm/include/asm/arch-keystone/ddr3.h +++ b/arch/arm/include/asm/arch-keystone/ddr3.h @@ -49,6 +49,7 @@ struct ddr3_emif_config { }; void ddr3_init(void); +void ddr3_reset_ddrphy(void); void ddr3_init_ddrphy(u32 base, struct ddr3_phy_config *phy_cfg); void ddr3_init_ddremif(u32 base, struct ddr3_emif_config *emif_cfg); diff --git a/arch/arm/include/asm/arch-keystone/hardware.h b/arch/arm/include/asm/arch-keystone/hardware.h index f8f986c..db2d36b 100644 --- a/arch/arm/include/asm/arch-keystone/hardware.h +++ b/arch/arm/include/asm/arch-keystone/hardware.h @@ -80,6 +80,8 @@ typedef volatile unsigned int *dv_reg_p; #define KS2_DDR3_PMCTL_OFFSET 0x38 #define KS2_DDR3_ZQCFG_OFFSET 0xC8 +#define KS2_DDR3_PLLCTRL_PHY_RESET 0x80000000 + #define KS2_UART0_BASE 0x02530c00 #define KS2_UART1_BASE 0x02531000 |