arm: rmobile: lager: Fix change of the CPU frequency
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>
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 @@
/* 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 */