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mmc: wmt-sdmmc: Simplify wmt_set_sd_power implementation

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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>
This commit is contained in:
Axel Lin 2013-10-03 17:04:40 +08:00 committed by Chris Ball
parent 8776a165d1
commit 7b2399034a
1 changed files with 8 additions and 22 deletions
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30
drivers/mmc/host/wmt-sdmmc.c
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@ -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)