omap: 3630: disable TLL SAR on 3630 ES1

USBTLL Save-and-Restore is broken in 3630 ES1.0. Having it
enabled could result in incorrect register restores as
the OMAP exits off-mode. This could potentially result in
unexpected wakeup events.

(Refer 3630 errata ID i579)

This is fixed in ES1.1. So disable it for ES1.0s.

Signed-off-by: Anand Gadiyar <gadiyar@ti.com>
Acked-by: Paul Walmsley <paul@pwsan.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

1 files changed, 10 insertions, 2 deletions

diff --git a/arch/arm/mach-omap2/powerdomains34xx.h b/arch/arm/mach-omap2/powerdomains34xx.h
index bd87112beea8..fa904861668b 100644
--- a/arch/arm/mach-omap2/powerdomains34xx.h
+++ b/arch/arm/mach-omap2/powerdomains34xx.h
@@ -75,12 +75,19 @@ static struct powerdomain mpu_3xxx_pwrdm = {
         },
 };
 
+/*
+ * The USBTLL Save-and-Restore mechanism is broken on
+ * 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
+ */
 static struct powerdomain core_3xxx_pre_es3_1_pwrdm = {
         .name             = "core_pwrdm",
         .prcm_offs        = CORE_MOD,
         .omap_chip        = OMAP_CHIP_INIT(CHIP_IS_OMAP3430ES1 |
                                            CHIP_IS_OMAP3430ES2 |
-                                           CHIP_IS_OMAP3430ES3_0),
+                                           CHIP_IS_OMAP3430ES3_0 |
+                                           CHIP_IS_OMAP3630ES1),
         .pwrsts           = PWRSTS_OFF_RET_ON,
         .pwrsts_logic_ret = PWRSTS_OFF_RET,
         .banks            = 2,
@@ -97,7 +104,8 @@ static struct powerdomain core_3xxx_pre_es3_1_pwrdm = {
 static struct powerdomain core_3xxx_es3_1_pwrdm = {
         .name             = "core_pwrdm",
         .prcm_offs        = CORE_MOD,
-        .omap_chip        = OMAP_CHIP_INIT(CHIP_GE_OMAP3430ES3_1),
+        .omap_chip        = OMAP_CHIP_INIT(CHIP_IS_OMAP3430ES3_1 |
+                                          CHIP_GE_OMAP3630ES1_1),
         .pwrsts           = PWRSTS_OFF_RET_ON,
         .pwrsts_logic_ret = PWRSTS_OFF_RET,
         .flags            = PWRDM_HAS_HDWR_SAR, /* for USBTLL only */