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...@renesas.com>
Signed-off-by: Nobuhiro Iwamatsu <nobuhiro.iwamatsu...@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 */
--
2.1.1
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