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OMAP3: add comments for erratas i540 and i478 workarounds

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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>
This commit is contained in:
Jean Pihet 2010-11-17 17:52:11 +00:00 committed by Tony Lindgren
parent fea83f6a9b
commit 447b8da5d7
2 changed files with 12 additions and 1 deletions
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5
arch/arm/mach-omap2/irq.c
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@ -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);
}

8
arch/arm/mach-omap2/powerdomains34xx.h
View file

@ -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 = {