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| author | Jean Pihet <j-pihet@ti.com> | 2010-12-18 18:44:46 +0300 |
|---|---|---|
| committer | Kevin Hilman <khilman@deeprootsystems.com> | 2010-12-22 01:45:59 +0300 |
| commit | 8352129166b8270253a746f336a4429b349b023d (patch) | |
| tree | 6e1a83e571d357b30ab15878b9ebcf8da21c0c62 /arch/arm/mach-omap2/sleep34xx.S | |
| parent | f7dfe3d8a98b7c4869c09826e3a65663cb9c71be (diff) | |
| download | linux-8352129166b8270253a746f336a4429b349b023d.tar.xz | |
OMAP3: add comments for low power code errata
Errata covered:
- 1.157 & 1.185
- i443
- i581
Tested on N900 and Beagleboard with full RET and OFF modes,
using cpuidle and suspend.
Signed-off-by: Jean Pihet <j-pihet@ti.com>
Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Tested-by: Nishanth Menon <nm@ti.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
Diffstat (limited to 'arch/arm/mach-omap2/sleep34xx.S')
| -rw-r--r-- | arch/arm/mach-omap2/sleep34xx.S | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/arch/arm/mach-omap2/sleep34xx.S b/arch/arm/mach-omap2/sleep34xx.S index 06e47326e17c..17dfe30db3a7 100644 --- a/arch/arm/mach-omap2/sleep34xx.S +++ b/arch/arm/mach-omap2/sleep34xx.S @@ -596,6 +596,7 @@ usettbr0: * Internal functions */ +/* This function implements the erratum ID i443 WA, applies to 34xx >= ES3.0 */ .text ENTRY(es3_sdrc_fix) ldr r4, sdrc_syscfg @ get config addr @@ -641,6 +642,16 @@ sdrc_manual_1: ENTRY(es3_sdrc_fix_sz) .word . - es3_sdrc_fix +/* + * This function implements the erratum ID i581 WA: + * SDRC state restore before accessing the SDRAM + * + * Only used at return from non-OFF mode. For OFF + * mode the ROM code configures the SDRC and + * the DPLL before calling the restore code directly + * from DDR. + */ + /* Make sure SDRC accesses are ok */ wait_sdrc_ok: |