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authorAxel Lin <axel.lin@ingics.com>2013-10-03 13:04:40 +0400
committerChris Ball <chris@printf.net>2013-10-21 23:57:15 +0400
commit7b2399034af31d934ce3efc898e023e027f110bd (patch)
tree371580f9ba6a9b07a0f97837420f436c22157357 /drivers/mmc/host/wmt-sdmmc.c
parent8776a165d152d57a3a58895d55204614abe93d7f (diff)
downloadlinux-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.c30
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)