diff options
| author | Paul Mundt <lethal@linux-sh.org> | 2012-06-21 13:44:42 +0900 |
|---|---|---|
| committer | Paul Mundt <lethal@linux-sh.org> | 2012-06-21 13:44:42 +0900 |
| commit | 7b98cf0cf4e8798b9e7435f966ed0d90a2a925de (patch) | |
| tree | a5d2a80f121a5c854773ddc85b1d9cbd6b840861 /drivers/mmc/host/atmel-mci-regs.h | |
| parent | e1eaf354528ceb002c8e2840a55c44cd76aaaed8 (diff) | |
| parent | 06d5631f56460917af3d9417ef63811cf0cad9ce (diff) | |
| download | linux-7b98cf0cf4e8798b9e7435f966ed0d90a2a925de.tar.gz | |
Merge branch 'common/pfc' into sh-latest
Diffstat (limited to 'drivers/mmc/host/atmel-mci-regs.h')
| -rw-r--r-- | drivers/mmc/host/atmel-mci-regs.h | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/drivers/mmc/host/atmel-mci-regs.h b/drivers/mmc/host/atmel-mci-regs.h index 787aba1682bb..ab56f7db5315 100644 --- a/drivers/mmc/host/atmel-mci-regs.h +++ b/drivers/mmc/host/atmel-mci-regs.h @@ -140,4 +140,18 @@ #define atmci_writel(port,reg,value) \ __raw_writel((value), (port)->regs + reg) +/* + * Fix sconfig's burst size according to atmel MCI. We need to convert them as: + * 1 -> 0, 4 -> 1, 8 -> 2, 16 -> 3. + * + * This can be done by finding most significant bit set. + */ +static inline unsigned int atmci_convert_chksize(unsigned int maxburst) +{ + if (maxburst > 1) + return fls(maxburst) - 2; + else + return 0; +} + #endif /* __DRIVERS_MMC_ATMEL_MCI_H__ */ |