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mmc: dw_mmc: fix suspend/resume operation

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This patch is related to re-init processing on suspend/resume.

When card is resuming, some register is reset.  If card is removable,
maybe controller should be rescan for card.  But if assume card is
non-removable, need to restore the old value at registers.

We store the value of FIFOTH at probe time and then restore it in
dw_mci_resume().

Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Acked-by: Will Newton <will.newton@imgtec.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
This commit is contained in:
Jaehoon Chung 2011-03-17 20:32:33 +09:00 • committed by Chris Ball
parent fc3d772054
commit e61cf1184d
2 changed files with 21 additions and 2 deletions
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1
include/linux/mmc/dw_mmc.h
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@ -140,6 +140,7 @@ struct dw_mci {
u32 bus_hz;
u32 current_speed;
u32 num_slots;
u32 fifoth_val;
struct platform_device *pdev;
struct dw_mci_board *pdata;
struct dw_mci_slot *slot[MAX_MCI_SLOTS];