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Commit 2ebe0ff7 authored by Magnus Damm's avatar Magnus Damm Committed by Paul Mundt
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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: default avatarMagnus Damm <damm@opensource.se>
Signed-off-by: default avatarPaul Mundt <lethal@linux-sh.org>
parent 98779ad8

arch/sh/kernel/cpu/sh4a/setup-sh7724.c

+11 −0
Original line number Diff line number Diff line
@@ -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;

}