OMAP3: pm: introduce errata handling

Introduce errata handling for OMAP3. This patch introduces
errata variable and stub for initialization which will be
filled up by follow-on patches.

Signed-off-by: Nishanth Menon <nm@ti.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>

2 files changed, 16 insertions, 0 deletions

diff --git a/arch/arm/mach-omap2/pm.h b/arch/arm/mach-omap2/pm.h
index 0d75bfd1fdbe..0348fd717f61 100644
--- a/arch/arm/mach-omap2/pm.h
+++ b/arch/arm/mach-omap2/pm.h
@@ -85,4 +85,11 @@ extern unsigned int save_secure_ram_context_sz;
 extern unsigned int omap24xx_cpu_suspend_sz;
 extern unsigned int omap34xx_cpu_suspend_sz;
 
+#if defined(CONFIG_PM) && defined(CONFIG_ARCH_OMAP3)
+extern u16 pm34xx_errata;
+#define IS_PM34XX_ERRATUM(id)           (pm34xx_errata & (id))
+#else
+#define IS_PM34XX_ERRATUM(id)           0
+#endif          /* defined(CONFIG_PM) && defined(CONFIG_ARCH_OMAP3) */
+
 #endif
diff --git a/arch/arm/mach-omap2/pm34xx.c b/arch/arm/mach-omap2/pm34xx.c
index 5bf344a3fcf5..288bee32e2b2 100644
--- a/arch/arm/mach-omap2/pm34xx.c
+++ b/arch/arm/mach-omap2/pm34xx.c
@@ -68,6 +68,9 @@ static inline bool is_suspending(void)
 #define OMAP343X_TABLE_VALUE_OFFSET        0xc0
 #define OMAP343X_CONTROL_REG_VALUE_OFFSET  0xc8
 
+/* pm34xx errata defined in pm.h */
+u16 pm34xx_errata;
+
 struct power_state {
         struct powerdomain *pwrdm;
         u32 next_state;
@@ -991,6 +994,10 @@ void omap_push_sram_idle(void)
                                 save_secure_ram_context_sz);
 }
 
+static void __init pm_errata_configure(void)
+{
+}
+
 static int __init omap3_pm_init(void)
 {
         struct power_state *pwrst, *tmp;
@@ -1000,6 +1007,8 @@ static int __init omap3_pm_init(void)
         if (!cpu_is_omap34xx())
                 return -ENODEV;
 
+        pm_errata_configure();
+
         printk(KERN_ERR "Power Management for TI OMAP3.\n");
 
         /* XXX prcm_setup_regs needs to be before enabling hw