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| author | Jean Pihet <jean.pihet@newoldbits.com> | 2010-11-17 20:52:11 +0300 |
|---|---|---|
| committer | Tony Lindgren <tony@atomide.com> | 2010-12-18 03:48:20 +0300 |
| commit | 447b8da5d78ac8f2815a7824c0eb4ad66ba3e11e (patch) | |
| tree | 95dfa4da0fc5f3b7ba2e85d82a3d62031d16f8de | |
| parent | fea83f6a9b0a90fefca16ac3534e308f6c34144b (diff) | |
| download | linux-447b8da5d78ac8f2815a7824c0eb4ad66ba3e11e.tar.xz | |
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>
| -rw-r--r-- | arch/arm/mach-omap2/irq.c | 5 | ||||
| -rw-r--r-- | 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 32eeabe9d2ab..85bf8ca95fd3 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 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 = { |