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>
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@ -284,7 +284,10 @@ void omap3_intc_suspend(void)
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void omap3_intc_prepare_idle(void)
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void omap3_intc_prepare_idle(void)
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{
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{
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/* Disable autoidle as it can stall interrupt controller */
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/*
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* Disable autoidle as it can stall interrupt controller,
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* cf. errata ID i540 for 3430 (all revisions up to 3.1.x)
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*/
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intc_bank_write_reg(0, &irq_banks[0], INTC_SYSCONFIG);
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intc_bank_write_reg(0, &irq_banks[0], INTC_SYSCONFIG);
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}
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}
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@ -80,6 +80,10 @@ static struct powerdomain mpu_3xxx_pwrdm = {
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* 3430s upto ES3.0 and 3630ES1.0. Hence this feature
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* 3430s upto ES3.0 and 3630ES1.0. Hence this feature
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* needs to be disabled on these chips.
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* needs to be disabled on these chips.
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* Refer: 3430 errata ID i459 and 3630 errata ID i579
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* Refer: 3430 errata ID i459 and 3630 errata ID i579
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*
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* Note: setting the SAR flag could help for errata ID i478
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* which applies to 3430 <= ES3.1, but since the SAR feature
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* is broken, do not use it.
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*/
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*/
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static struct powerdomain core_3xxx_pre_es3_1_pwrdm = {
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static struct powerdomain core_3xxx_pre_es3_1_pwrdm = {
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.name = "core_pwrdm",
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.name = "core_pwrdm",
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@ -108,6 +112,10 @@ static struct powerdomain core_3xxx_es3_1_pwrdm = {
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CHIP_GE_OMAP3630ES1_1),
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CHIP_GE_OMAP3630ES1_1),
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.pwrsts = PWRSTS_OFF_RET_ON,
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.pwrsts = PWRSTS_OFF_RET_ON,
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.pwrsts_logic_ret = PWRSTS_OFF_RET,
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.pwrsts_logic_ret = PWRSTS_OFF_RET,
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/*
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* Setting the SAR flag for errata ID i478 which applies
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* to 3430 <= ES3.1
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*/
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.flags = PWRDM_HAS_HDWR_SAR, /* for USBTLL only */
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.flags = PWRDM_HAS_HDWR_SAR, /* for USBTLL only */
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.banks = 2,
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.banks = 2,
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.pwrsts_mem_ret = {
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.pwrsts_mem_ret = {
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