The change of the CPU frequency is waited for until PLL0ST of the PLLECR is set to 1.
Signed-off-by: Hisashi Nakamura hisashi.nakamura.ak@renesas.com Signed-off-by: Nobuhiro Iwamatsu nobuhiro.iwamatsu.yj@renesas.com --- arch/arm/include/asm/arch-rmobile/rcar-base.h | 2 ++ board/renesas/lager/lager.c | 5 +++++ 2 files changed, 7 insertions(+)
diff --git a/arch/arm/include/asm/arch-rmobile/rcar-base.h b/arch/arm/include/asm/arch-rmobile/rcar-base.h index 027e9b1..9c1439b 100644 --- a/arch/arm/include/asm/arch-rmobile/rcar-base.h +++ b/arch/arm/include/asm/arch-rmobile/rcar-base.h @@ -385,6 +385,8 @@ #define PLL0CR 0xE61500D8 #define PLL0_STC_MASK 0x7F000000 #define PLL0_STC_BIT 24 +#define PLLECR 0xE61500D0 +#define PLL0ST 0x100
#ifndef __ASSEMBLY__ #include <asm/types.h> diff --git a/board/renesas/lager/lager.c b/board/renesas/lager/lager.c index 5302839..1fc5833 100644 --- a/board/renesas/lager/lager.c +++ b/board/renesas/lager/lager.c @@ -36,9 +36,14 @@ void s_init(void)
/* CPU frequency setting. Set to 1.4GHz */ if (rmobile_get_cpu_rev_integer() >= R8A7790_CUT_ES2X) { + u32 stat = 0; u32 stc = ((1400 / CLK2MHZ(CONFIG_SYS_CLK_FREQ)) - 1) << PLL0_STC_BIT; clrsetbits_le32(PLL0CR, PLL0_STC_MASK, stc); + + do { + stat = readl(PLLECR) & PLL0ST; + } while (stat == 0x0); }
/* QoS(Quality-of-Service) Init */