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| author | Nishanth Menon <nm@ti.com> | 2010-12-20 14:05:06 -0600 |
|---|---|---|
| committer | Kevin Hilman <khilman@deeprootsystems.com> | 2010-12-21 14:45:50 -0800 |
| commit | 458e999eb14a301d4176783c8fcb277f5d009b4e (patch) | |
| tree | 7300efdef971f91e4d7601f9bc1174fe9716f313 /arch/arm/mach-omap2/control.c | |
| parent | 8cdfd83473d9b408b924b5d32777ac3fddd251ff (diff) | |
| download | linux-458e999eb14a301d4176783c8fcb277f5d009b4e.tar.gz | |
OMAP3630: PM: Erratum i608: disable RTA
Erratum id: i608 RTA (Retention Till Access) feature is not supported and leads to device stability issues when enabled. This impacts modules with embedded memories on OMAP3630 Workaround is to disable RTA on boot and coming out of core off. For disabling RTA coming out of off mode, we do this by overriding the restore pointer for 3630 as the first point of entry before caches are touched and is common for GP and HS devices. To disable earlier than this could be possible by modifying the PPA for HS devices, but not for GP devices. Cc: Kevin Hilman <khilman@deeprootsystems.com> Cc: Tony Lindgren <tony@atomide.com> Acked-by: Jean Pihet <j-pihet@ti.com> Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com> [ambresh@ti.com: co-developer] Signed-off-by: Ambresh K <ambresh@ti.com> Signed-off-by: Nishanth Menon <nm@ti.com> Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
Diffstat (limited to 'arch/arm/mach-omap2/control.c')
| -rw-r--r-- | arch/arm/mach-omap2/control.c | 13 |
1 files changed, 12 insertions, 1 deletions
diff --git a/arch/arm/mach-omap2/control.c b/arch/arm/mach-omap2/control.c index 1fa3294b6048..27ed558fdf54 100644 --- a/arch/arm/mach-omap2/control.c +++ b/arch/arm/mach-omap2/control.c @@ -241,7 +241,10 @@ void omap3_save_scratchpad_contents(void) /* Populate the Scratchpad contents */ scratchpad_contents.boot_config_ptr = 0x0; - if (omap_rev() != OMAP3430_REV_ES3_0 && + if (cpu_is_omap3630()) + scratchpad_contents.public_restore_ptr = + virt_to_phys(get_omap3630_restore_pointer()); + else if (omap_rev() != OMAP3430_REV_ES3_0 && omap_rev() != OMAP3430_REV_ES3_1) scratchpad_contents.public_restore_ptr = virt_to_phys(get_restore_pointer()); @@ -474,4 +477,12 @@ void omap3_control_restore_context(void) omap_ctrl_writel(control_context.csi, OMAP343X_CONTROL_CSI); return; } + +void omap3630_ctrl_disable_rta(void) +{ + if (!cpu_is_omap3630()) + return; + omap_ctrl_writel(OMAP36XX_RTA_DISABLE, OMAP36XX_CONTROL_MEM_RTA_CTRL); +} + #endif /* CONFIG_ARCH_OMAP3 && CONFIG_PM */ |