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sh: Keep track of allowed sleep modes

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Add code to keep track of supported sleep modes. This to
only export cpuidle modes that are backed by board support
code. Also, do not allow suspend-to-ram if sdram board code
is missing.

Signed-off-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
This commit is contained in:
Magnus Damm
2009-10-30 04:24:15 +00:00
committed by Paul Mundt
parent 323ef8dba6
commit 02bf89347c
3 changed files with 34 additions and 18 deletions
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7
arch/sh/kernel/cpu/shmobile/pm.c
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@@ -67,6 +67,8 @@ extern char sh_mobile_sleep_enter_end;
extern char sh_mobile_sleep_resume_start;
extern char sh_mobile_sleep_resume_end;
unsigned long sh_mobile_sleep_supported = SUSP_SH_SLEEP;
void sh_mobile_register_self_refresh(unsigned long flags,
void *pre_start, void *pre_end,
void *post_start, void *post_end)
@@ -103,10 +105,15 @@ void sh_mobile_register_self_refresh(unsigned long flags,
vp = onchip_mem + 0x600; /* located at interrupt vector */
n = &sh_mobile_sleep_resume_end - &sh_mobile_sleep_resume_start;
memcpy(vp, &sh_mobile_sleep_resume_start, n);
sh_mobile_sleep_supported |= flags;
}
static int sh_pm_enter(suspend_state_t state)
{
if (!(sh_mobile_sleep_supported & SUSP_MODE_STANDBY_SF))
return -ENXIO;
local_irq_disable();
set_bl_bit();
sh_mobile_call_standby(SUSP_MODE_STANDBY_SF);