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sh: Add CPG save/restore code for sh7724 R-standby

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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>
This commit is contained in:
Magnus Damm 2009-11-27 05:16:21 +00:00 committed by Paul Mundt
parent 98779ad822
commit 2ebe0ff7e6
1 changed files with 11 additions and 0 deletions
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11
arch/sh/kernel/cpu/sh4a/setup-sh7724.c
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@ -941,6 +941,9 @@ static struct {
/* 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 @@ static int sh7724_pre_sleep_notifier_call(struct notifier_block *nb,
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 @@ static int sh7724_post_sleep_notifier_call(struct notifier_block *nb,
__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;
}