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| author | Jacky Cheung <jacky.cheung@ti.com> | 2012-02-24 13:55:11 -0800 |
|---|---|---|
| committer | Jacky Cheung <jacky.cheung@ti.com> | 2012-04-18 11:28:50 -0700 |
| commit | a6d21d824242244ec6c02c18a517bf021f1e70cd (patch) | |
| tree | 32f54ec3c092c5184509b2b497d49cb159bd087e /drivers/gpio | |
| parent | afadff82e7b2041498c95f266b76b21dda04e703 (diff) | |
| download | kernel_samsung_tuna-a6d21d824242244ec6c02c18a517bf021f1e70cd.zip kernel_samsung_tuna-a6d21d824242244ec6c02c18a517bf021f1e70cd.tar.gz kernel_samsung_tuna-a6d21d824242244ec6c02c18a517bf021f1e70cd.tar.bz2 | |
OMAP4: EMIF: Disable EMIF DDR self refresh during EMIF frequency change sequences
Errata ID: i728
Description:
If during a small window the following three events occur simultaneously:
1) The EMIF_PWR_MGMT_CTRL[7:4] REG_SR_TIM SR_TIMING counter expires
2) Frequency change update is requested CM_SHADOW_FREQ_CONFIG1
FREQ_UPDATE set to 1
3) OCP access is requested
There will be clock instability on the DDR interface.
Workaround:
Prevent event 1) while event 2) is happening: Disable the self-refresh when
self-refresh is enabled and a frequency change sequence is requested.
Change-Id: I6c216d18f2747dae8a9160669533f0f1582d3301
Signed-off-by: Jacky Cheung <jacky.cheung@ti.com>
Diffstat (limited to 'drivers/gpio')
0 files changed, 0 insertions, 0 deletions