OMAP3: add comments for erratas i540 and i478 workarounds

Add comments and IDs for the following erratas:
- i540: MPU cannot exit from Standby,
- i478: Unexpected Cold-Reset is generated when device is coming
   back from OFF mode

Signed-off-by: Jean Pihet <j-pihet@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

1 files changed, 8 insertions, 0 deletions

diff --git a/arch/arm/mach-omap2/powerdomains34xx.h b/arch/arm/mach-omap2/powerdomains34xx.h
index fa904861668b..ce5c15bc41b8 100644
--- a/arch/arm/mach-omap2/powerdomains34xx.h
+++ b/arch/arm/mach-omap2/powerdomains34xx.h
@@ -80,6 +80,10 @@ static struct powerdomain mpu_3xxx_pwrdm = {
  * 3430s upto ES3.0 and 3630ES1.0. Hence this feature
  * needs to be disabled on these chips.
  * Refer: 3430 errata ID i459 and 3630 errata ID i579
+ *
+ * Note: setting the SAR flag could help for errata ID i478
+ *  which applies to 3430 <= ES3.1, but since the SAR feature
+ *  is broken, do not use it.
  */
 static struct powerdomain core_3xxx_pre_es3_1_pwrdm = {
         .name             = "core_pwrdm",
@@ -108,6 +112,10 @@ static struct powerdomain core_3xxx_es3_1_pwrdm = {
                                           CHIP_GE_OMAP3630ES1_1),
         .pwrsts           = PWRSTS_OFF_RET_ON,
         .pwrsts_logic_ret = PWRSTS_OFF_RET,
+        /*
+         * Setting the SAR flag for errata ID i478 which applies
+         *  to 3430 <= ES3.1
+         */
         .flags            = PWRDM_HAS_HDWR_SAR, /* for USBTLL only */
         .banks            = 2,
         .pwrsts_mem_ret   = {