OMAP3: control/PRCM: move CONTROL_PADCONF_SYS_NIRQ save/restore to SCM code

For some reason, the PRCM context save/restore code also saves and
restores a single System Control Module register,
CONTROL_PADCONF_SYS_NIRQ.  This is probably just an error -- the
register should be handled by SCM code -- so this patch moves it
there.

If this register really does need to be saved and restored before the
rest of the PRCM registers, the code to do so should live in the SCM
code, and the PM code should call this separate function.  This
register pertains to devices with a stacked modem, so this patch is
unlikely to affect most OMAP devices out there.

Signed-off-by: Paul Walmsley <paul@pwsan.com>
Cc: Kevin Hilman <khilman@deeprootsystems.com>
Reviewed-by: Kevin Hilman <khilman@deeprootsystems.com>
Tested-by: Kevin Hilman <khilman@deeprootsystems.com>
Tested-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Tested-by: Rajendra Nayak <rnayak@ti.com>

1 files changed, 5 insertions, 0 deletions

diff --git a/arch/arm/mach-omap2/control.c b/arch/arm/mach-omap2/control.c
index d058f7c3ec6a..b066c6e110a6 100644
--- a/arch/arm/mach-omap2/control.c
+++ b/arch/arm/mach-omap2/control.c
@@ -134,6 +134,7 @@ struct omap3_control_regs {
         u32 sramldo4;
         u32 sramldo5;
         u32 csi;
+        u32 padconf_sys_nirq;
 };
 
 static struct omap3_control_regs control_context;
@@ -457,6 +458,8 @@ void omap3_control_save_context(void)
         control_context.sramldo4 = omap_ctrl_readl(OMAP343X_CONTROL_SRAMLDO4);
         control_context.sramldo5 = omap_ctrl_readl(OMAP343X_CONTROL_SRAMLDO5);
         control_context.csi = omap_ctrl_readl(OMAP343X_CONTROL_CSI);
+        control_context.padconf_sys_nirq =
+                omap_ctrl_readl(OMAP343X_CONTROL_PADCONF_SYSNIRQ);
         return;
 }
 
@@ -513,6 +516,8 @@ void omap3_control_restore_context(void)
         omap_ctrl_writel(control_context.sramldo4, OMAP343X_CONTROL_SRAMLDO4);
         omap_ctrl_writel(control_context.sramldo5, OMAP343X_CONTROL_SRAMLDO5);
         omap_ctrl_writel(control_context.csi, OMAP343X_CONTROL_CSI);
+        omap_ctrl_writel(control_context.padconf_sys_nirq,
+                         OMAP343X_CONTROL_PADCONF_SYSNIRQ);
         return;
 }