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authorNishanth Menon <nm@ti.com>2016-04-01 17:53:05 -0500
committerTony Lindgren <tony@atomide.com>2016-04-08 08:54:24 -0700
commitc783e6fd7fe4d34f0231d0d8da36497404aa6d93 (patch)
treef99d8b935de71996973e758d0eea44bf2bde0394 /arch/arm/mach-omap2
parent9735a22799b9214d17d3c231fe377fc852f042e9 (diff)
downloadlinux-c783e6fd7fe4d34f0231d0d8da36497404aa6d93.tar.bz2
ARM: OMAP: DRA7: wakeupgen: Skip SAR save for wakeupgen
DRA7 has no SAR region for automated save and restore of wakeupgen, which does not make real since the SoC really does not do legacy OFF mode anymore. Further wakeupgen should never loose context in CSWR retention mode for MPU domain on DRA7 since that is the deepest state we will enter. So, just skip, instead of oopsing as follows while attemptint to enter suspend on BeagleBoard-X15. [ 55.589771] Unable to handle kernel paging request at virtual address 00002684 [ 55.589771] pgd = ec69c000 [...] [ 55.589771] [<c0123cc8>] (irq_notifier) from [<c015ad70>] (notifier_call_chain+0x4c/0x8c) [ 55.589771] [<c015ad70>] (notifier_call_chain) from [<c021469c>] (cpu_cluster_pm_enter+0x2c/0x78) [ 55.589771] [<c021469c>] (cpu_cluster_pm_enter) from [<c0514508>] (syscore_suspend+0xb8/0x31c) [ 55.589771] [<c0514508>] (syscore_suspend) from [<c0197d24>] (suspend_devices_and_enter+0x308/0x9e4) [ 55.589771] [<c0197d24>] (suspend_devices_and_enter) from [<c0198a40>] (pm_suspend+0x640/0x75c) [ 55.589771] [<c0198a40>] (pm_suspend) from [<c0196bcc>] (state_store+0x64/0xb8) [ 55.589771] [<c0196bcc>] (state_store) from [<c0307914>] (kernfs_fop_write+0xc0/0x1bc) [ 55.589771] [<c0307914>] (kernfs_fop_write) from [<c028ac80>] (__vfs_write+0x1c/0xd8) [ 55.589771] [<c028ac80>] (__vfs_write) from [<c028bb70>] (vfs_write+0x90/0x16c) [ 55.589771] [<c028bb70>] (vfs_write) from [<c028c890>] (SyS_write+0x44/0x9c) [ 55.589771] [<c028c890>] (SyS_write) from [<c0107840>] (ret_fast_syscall+0x0/0x1c) [...] Signed-off-by: Nishanth Menon <nm@ti.com> Tested-by: Keerthy <j-keerthy@ti.com> Signed-off-by: Tony Lindgren <tony@atomide.com>
Diffstat (limited to 'arch/arm/mach-omap2')
-rw-r--r--arch/arm/mach-omap2/omap-wakeupgen.c7
1 files changed, 7 insertions, 0 deletions
diff --git a/arch/arm/mach-omap2/omap-wakeupgen.c b/arch/arm/mach-omap2/omap-wakeupgen.c
index f397bd6bd6e3..2c04f2741476 100644
--- a/arch/arm/mach-omap2/omap-wakeupgen.c
+++ b/arch/arm/mach-omap2/omap-wakeupgen.c
@@ -274,6 +274,10 @@ static inline void omap5_irq_save_context(void)
*/
static void irq_save_context(void)
{
+ /* DRA7 has no SAR to save */
+ if (soc_is_dra7xx())
+ return;
+
if (!sar_base)
sar_base = omap4_get_sar_ram_base();
@@ -290,6 +294,9 @@ static void irq_sar_clear(void)
{
u32 val;
u32 offset = SAR_BACKUP_STATUS_OFFSET;
+ /* DRA7 has no SAR to save */
+ if (soc_is_dra7xx())
+ return;
if (soc_is_omap54xx())
offset = OMAP5_SAR_BACKUP_STATUS_OFFSET;