mmc: add the MMC_CLK_ENABLE/DISABLE macro in mmc.h

mmc_set_clock() function has the disable argument as bool type.
When mmc_set_clock is called, it might be passed to "true" or "false".
But it's too confusion whether clock is enabled or disabled with only
"true" and "false".
To prevent the confusion, replace to MMC_CLK_ENABLE/DISABLE macro from
true/false.

Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com>

drivers/mmc/fsl_esdhc.c

@@ -982,7 +982,7 @@ static int esdhc_init_common(struct fsl_esdhc_priv *priv, struct mmc *mmc)
 #endif
 
 	/* Set the initial clock speed */
-	mmc_set_clock(mmc, 400000, false);
+	mmc_set_clock(mmc, 400000, MMC_CLK_ENABLE);
 
 	/* Disable the BRR and BWR bits in IRQSTAT */
 	esdhc_clrbits32(&regs->irqstaten, IRQSTATEN_BRR | IRQSTATEN_BWR);

drivers/mmc/meson_gx_mmc.c

@@ -252,7 +252,7 @@ static int meson_mmc_probe(struct udevice *dev)
 	mmc->priv = pdata;
 	upriv->mmc = mmc;
 
-	mmc_set_clock(mmc, cfg->f_min, false);
+	mmc_set_clock(mmc, cfg->f_min, MMC_CLK_ENABLE);
 
 	/* reset all status bits */
 	meson_write(mmc, STATUS_MASK, MESON_SD_EMMC_STATUS);

drivers/mmc/mmc.c

@@ -529,7 +529,7 @@ static int mmc_switch_voltage(struct mmc *mmc, int signal_voltage)
 	 * During a signal voltage level switch, the clock must be gated
 	 * for 5 ms according to the SD spec
 	 */
-	mmc_set_clock(mmc, mmc->clock, true);
+	mmc_set_clock(mmc, mmc->clock, MMC_CLK_DISABLE);
 
 	err = mmc_set_signal_voltage(mmc, signal_voltage);
 	if (err)
@@ -537,7 +537,7 @@ static int mmc_switch_voltage(struct mmc *mmc, int signal_voltage)
 
 	/* Keep clock gated for at least 10 ms, though spec only says 5 ms */
 	mdelay(10);
-	mmc_set_clock(mmc, mmc->clock, false);
+	mmc_set_clock(mmc, mmc->clock, MMC_CLK_ENABLE);
 
 	/*
 	 * Failure to switch is indicated by the card holding
@@ -1672,7 +1672,8 @@ static int sd_select_mode_and_width(struct mmc *mmc, uint card_caps)
 
 				/* configure the bus mode (host) */
 				mmc_select_mode(mmc, mwt->mode);
-				mmc_set_clock(mmc, mmc->tran_speed, false);
+				mmc_set_clock(mmc, mmc->tran_speed,
+						MMC_CLK_ENABLE);
 
 #ifdef MMC_SUPPORTS_TUNING
 				/* execute tuning if needed */
@@ -1697,7 +1698,8 @@ static int sd_select_mode_and_width(struct mmc *mmc, uint card_caps)
 error:
 				/* revert to a safer bus speed */
 				mmc_select_mode(mmc, SD_LEGACY);
-				mmc_set_clock(mmc, mmc->tran_speed, false);
+				mmc_set_clock(mmc, mmc->tran_speed,
+						MMC_CLK_ENABLE);
 			}
 		}
 	}
@@ -1858,7 +1860,7 @@ static int mmc_select_mode_and_width(struct mmc *mmc, uint card_caps)
 		return -ENOTSUPP;
 	}
 
-	mmc_set_clock(mmc, mmc->legacy_speed, false);
+	mmc_set_clock(mmc, mmc->legacy_speed, MMC_CLK_ENABLE);
 
 	for_each_mmc_mode_by_pref(card_caps, mwt) {
 		for_each_supported_width(card_caps & mwt->widths,
@@ -1901,7 +1903,7 @@ static int mmc_select_mode_and_width(struct mmc *mmc, uint card_caps)
 
 			/* configure the bus mode (host) */
 			mmc_select_mode(mmc, mwt->mode);
-			mmc_set_clock(mmc, mmc->tran_speed, false);
+			mmc_set_clock(mmc, mmc->tran_speed, MMC_CLK_ENABLE);
 #ifdef MMC_SUPPORTS_TUNING
 
 			/* execute tuning if needed */
@@ -2426,7 +2428,7 @@ static void mmc_set_initial_state(struct mmc *mmc)
 
 	mmc_select_mode(mmc, MMC_LEGACY);
 	mmc_set_bus_width(mmc, 1);
-	mmc_set_clock(mmc, 0, false);
+	mmc_set_clock(mmc, 0, MMC_CLK_ENABLE);
 }
 
 static int mmc_power_on(struct mmc *mmc)
@@ -2446,7 +2448,7 @@ static int mmc_power_on(struct mmc *mmc)
 
 static int mmc_power_off(struct mmc *mmc)
 {
-	mmc_set_clock(mmc, 0, true);
+	mmc_set_clock(mmc, 0, MMC_CLK_DISABLE);
 #if CONFIG_IS_ENABLED(DM_MMC) && CONFIG_IS_ENABLED(DM_REGULATOR)
 	if (mmc->vmmc_supply) {
 		int ret = regulator_set_enable(mmc->vmmc_supply, false);

include/mmc.h

@@ -707,6 +707,9 @@ int mmc_voltage_to_mv(enum mmc_voltage voltage);
  */
 int mmc_set_clock(struct mmc *mmc, uint clock, bool disable);
 
+#define MMC_CLK_ENABLE		false
+#define MMC_CLK_DISABLE		true
+
 struct mmc *find_mmc_device(int dev_num);
 int mmc_set_dev(int dev_num);
 void print_mmc_devices(char separator);