diff options
| author | Axel Lin <axel.lin@ingics.com> | 2013-10-03 13:04:40 +0400 |
|---|---|---|
| committer | Chris Ball <chris@printf.net> | 2013-10-21 23:57:15 +0400 |
| commit | 7b2399034af31d934ce3efc898e023e027f110bd (patch) | |
| tree | 371580f9ba6a9b07a0f97837420f436c22157357 /drivers/mmc/host/wmt-sdmmc.c | |
| parent | 8776a165d152d57a3a58895d55204614abe93d7f (diff) | |
| download | linux-7b2399034af31d934ce3efc898e023e027f110bd.tar.xz | |
mmc: wmt-sdmmc: Simplify wmt_set_sd_power implementation
Simplify the code to set/clear BM_SD_OFF bit:
| power_inverted: 0 | power_inverted: 1
-------------------------------------------------
enable: 0 | SET BM_SD_OFF | CLEAR BM_SD_OFF
-------------------------------------------------
enable: 1 | CLEAR BM_SD_OFF | SET BM_SD_OFF
Signed-off-by: Axel Lin <axel.lin@ingics.com>
Acked-by: Tony Prisk <linux@prisktech.co.nz>
Signed-off-by: Chris Ball <cjb@laptop.org>
Diffstat (limited to 'drivers/mmc/host/wmt-sdmmc.c')
| -rw-r--r-- | drivers/mmc/host/wmt-sdmmc.c | 30 |
1 files changed, 8 insertions, 22 deletions
diff --git a/drivers/mmc/host/wmt-sdmmc.c b/drivers/mmc/host/wmt-sdmmc.c index 34231d5168fc..57858efb3762 100644 --- a/drivers/mmc/host/wmt-sdmmc.c +++ b/drivers/mmc/host/wmt-sdmmc.c @@ -212,28 +212,14 @@ struct wmt_mci_priv { static void wmt_set_sd_power(struct wmt_mci_priv *priv, int enable) { - u32 reg_tmp; - if (enable) { - if (priv->power_inverted) { - reg_tmp = readb(priv->sdmmc_base + SDMMC_BUSMODE); - writeb(reg_tmp | BM_SD_OFF, - priv->sdmmc_base + SDMMC_BUSMODE); - } else { - reg_tmp = readb(priv->sdmmc_base + SDMMC_BUSMODE); - writeb(reg_tmp & (~BM_SD_OFF), - priv->sdmmc_base + SDMMC_BUSMODE); - } - } else { - if (priv->power_inverted) { - reg_tmp = readb(priv->sdmmc_base + SDMMC_BUSMODE); - writeb(reg_tmp & (~BM_SD_OFF), - priv->sdmmc_base + SDMMC_BUSMODE); - } else { - reg_tmp = readb(priv->sdmmc_base + SDMMC_BUSMODE); - writeb(reg_tmp | BM_SD_OFF, - priv->sdmmc_base + SDMMC_BUSMODE); - } - } + u32 reg_tmp = readb(priv->sdmmc_base + SDMMC_BUSMODE); + + if (enable ^ priv->power_inverted) + reg_tmp &= ~BM_SD_OFF; + else + reg_tmp |= BM_SD_OFF; + + writeb(reg_tmp, priv->sdmmc_base + SDMMC_BUSMODE); } static void wmt_mci_read_response(struct mmc_host *mmc) |