staging: mt7621-mmc: Replace macro sdr_get_field with function

Currently sdr_get_field is a macro, to bring the code in line with the
upstream driver mtk-sd, it is changed to a function.
Signed-off-by: Christian Lütke-Stetzkamp <christian@lkamp.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/mt7621-mmc/mt6575_sd.h

@@ -980,10 +980,10 @@ static inline void sdr_set_field(void __iomem *reg, u32 field, u32 val)
 	writel(tv, reg);
 }
 
-#define sdr_get_field(reg, field, val)					\
-do {								\
-	volatile unsigned int tv = sdr_read32(reg);			\
-	val = ((tv & (field)) >> (ffs((unsigned int)field) - 1));	\
-} while (0)
+static inline void sdr_get_field(void __iomem *reg, u32 field, u32 *val)
+{
+	unsigned int tv = readl(reg);
+	*val = ((tv & field) >> (ffs((unsigned int)field) - 1));
+}
 
 #endif

drivers/staging/mt7621-mmc/sd.c

@@ -1577,8 +1577,8 @@ static int msdc_tune_cmdrsp(struct msdc_host *host, struct mmc_command *cmd)
 	   ==========================*/
 
 	// save the previous tune result
-	sdr_get_field(MSDC_IOCON,    MSDC_IOCON_RSPL,        orig_rsmpl);
-	sdr_get_field(MSDC_PAD_TUNE, MSDC_PAD_TUNE_CMDRRDLY, orig_rrdly);
+	sdr_get_field(MSDC_IOCON,    MSDC_IOCON_RSPL,        &orig_rsmpl);
+	sdr_get_field(MSDC_PAD_TUNE, MSDC_PAD_TUNE_CMDRRDLY, &orig_rrdly);
 
 	rrdly = 0;
 	do {
@@ -1640,7 +1640,7 @@ static int msdc_tune_bread(struct mmc_host *mmc, struct mmc_request *mrq)
 	int result = -1;
 	u32 skip = 1;
 
-	sdr_get_field(MSDC_IOCON, MSDC_IOCON_DSPL, orig_dsmpl);
+	sdr_get_field(MSDC_IOCON, MSDC_IOCON_DSPL, &orig_dsmpl);
 
 	/* Tune Method 2. */
 	sdr_set_field(MSDC_IOCON, MSDC_IOCON_DDLSEL, 1);
@@ -1664,7 +1664,9 @@ static int msdc_tune_bread(struct mmc_host *mmc, struct mmc_request *mrq)
 			}
 			result = msdc_do_request(mmc, mrq);
 
-			sdr_get_field(SDC_DCRC_STS, SDC_DCRC_STS_POS | SDC_DCRC_STS_NEG, dcrc); /* RO */
+			sdr_get_field(SDC_DCRC_STS,
+				      SDC_DCRC_STS_POS | SDC_DCRC_STS_NEG,
+				      &dcrc); /* RO */
 			if (!ddr)
 				dcrc &= ~SDC_DCRC_STS_NEG;
 			ERR_MSG("TUNE_BREAD<%s> dcrc<0x%x> DATRDDLY0/1<0x%x><0x%x> dsmpl<0x%x>",
@@ -1751,8 +1753,8 @@ static int msdc_tune_bwrite(struct mmc_host *mmc, struct mmc_request *mrq)
 
 	// MSDC_IOCON_DDR50CKD need to check. [Fix me]
 
-	sdr_get_field(MSDC_PAD_TUNE, MSDC_PAD_TUNE_DATWRDLY, orig_wrrdly);
-	sdr_get_field(MSDC_IOCON,    MSDC_IOCON_DSPL,        orig_dsmpl);
+	sdr_get_field(MSDC_PAD_TUNE, MSDC_PAD_TUNE_DATWRDLY, &orig_wrrdly);
+	sdr_get_field(MSDC_IOCON,    MSDC_IOCON_DSPL,        &orig_dsmpl);
 
 	/* Tune Method 2. just DAT0 */
 	sdr_set_field(MSDC_IOCON, MSDC_IOCON_DDLSEL, 1);