sh: Add CPG save/restore code for sh7724 R-standby
Add sh7724 code to save and restore CPG state during
R-standby. Only CPG registers IRDACLKCR and SPUCLKCR
require software save and restore.
Signed-off-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
diff --git a/arch/sh/kernel/cpu/sh4a/setup-sh7724.c b/arch/sh/kernel/cpu/sh4a/setup-sh7724.c
index 9c3cc8f..16e1874 100644
--- a/arch/sh/kernel/cpu/sh4a/setup-sh7724.c
+++ b/arch/sh/kernel/cpu/sh4a/setup-sh7724.c
@@ -941,6 +941,9 @@
/* RWDT */
unsigned short rwtcnt;
unsigned short rwtcsr;
+ /* CPG */
+ unsigned long irdaclk;
+ unsigned long spuclk;
} sh7724_rstandby_state;
static int sh7724_pre_sleep_notifier_call(struct notifier_block *nb,
@@ -998,6 +1001,10 @@
sh7724_rstandby_state.rwtcsr |= 0xa500;
__raw_writew(sh7724_rstandby_state.rwtcsr & 0x07, 0xa4520004);
+ /* CPG */
+ sh7724_rstandby_state.irdaclk = __raw_readl(0xa4150018); /* IRDACLKCR */
+ sh7724_rstandby_state.spuclk = __raw_readl(0xa415003c); /* SPUCLKCR */
+
return NOTIFY_DONE;
}
@@ -1052,6 +1059,10 @@
__raw_writew(sh7724_rstandby_state.rwtcnt, 0xa4520000); /* RWTCNT */
__raw_writew(sh7724_rstandby_state.rwtcsr, 0xa4520004); /* RWTCSR */
+ /* CPG */
+ __raw_writel(sh7724_rstandby_state.irdaclk, 0xa4150018); /* IRDACLKCR */
+ __raw_writel(sh7724_rstandby_state.spuclk, 0xa415003c); /* SPUCLKCR */
+
return NOTIFY_DONE;
}