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arm: rmobile: lager: Fix change of the CPU frequency

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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>
Signed-off-by: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
This commit is contained in:
Nobuhiro Iwamatsu 2014-10-31 16:08:11 +09:00 committed by Nobuhiro Iwamatsu
parent 3372a9a7a8
commit d8659c6d25
2 changed files with 7 additions and 0 deletions
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2
arch/arm/include/asm/arch-rmobile/rcar-base.h
View File

@ -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>

5
board/renesas/lager/lager.c
View File

@ -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 */