From: Jean Pihet <jean.pihet@xxxxxxxxxxxxxx>
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@xxxxxx>
---
arch/arm/mach-omap2/irq.c | 5 ++++-
arch/arm/mach-omap2/powerdomains34xx.h | 8 ++++++++
2 files changed, 12 insertions(+), 1 deletions(-)
diff --git a/arch/arm/mach-omap2/irq.c b/arch/arm/mach-omap2/irq.c
index 32eeabe..85bf8ca 100644
--- a/arch/arm/mach-omap2/irq.c
+++ b/arch/arm/mach-omap2/irq.c
@@ -284,7 +284,10 @@ void omap3_intc_suspend(void)
void omap3_intc_prepare_idle(void)
{
- /* Disable autoidle as it can stall interrupt controller */
+ /*
+ * Disable autoidle as it can stall interrupt controller,
+ * cf. errata ID i540 for 3430 (all revisions up to 3.1.x)
+ */
intc_bank_write_reg(0, &irq_banks[0], INTC_SYSCONFIG);
}
diff --git a/arch/arm/mach-omap2/powerdomains34xx.h b/arch/arm/mach-omap2/powerdomains34xx.h
index fa90486..ce5c15b 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 = {
--
1.7.2.3
--
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