[PATCH] mmc: fsl_esdhc: Gracefully fail on unsupported voltage switch

[Marek Vasut]

Unsupported voltage on voltage switch is not an error, do not
print error message in such a case. This happens e.g. if the
eMMC is already in 1V8 mode or when testing 1V2 mode operation
on systems which only do 3V3/1V8 switching.

Signed-off-by: Marek Vasut <marex at denx.de>
Cc: Fabio Estevam <fabio.estevam at nxp.com>
Cc: Jaehoon Chung <jh80.chung at samsung.com>
Cc: Peng Fan <peng.fan at nxp.com>
Cc: Stefano Babic <sbabic at denx.de>
---
 drivers/mmc/fsl_esdhc_imx.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/mmc/fsl_esdhc_imx.c b/drivers/mmc/fsl_esdhc_imx.c
index f3101a061a..f42e018434 100644
--- a/drivers/mmc/fsl_esdhc_imx.c
+++ b/drivers/mmc/fsl_esdhc_imx.c
@@ -791,7 +791,7 @@ static int esdhc_set_voltage(struct mmc *mmc)
 	switch (mmc->signal_voltage) {
 	case MMC_SIGNAL_VOLTAGE_330:
 		if (priv->vs18_enable)
-			return -EIO;
+			return -ENOTSUPP;
 #if CONFIG_IS_ENABLED(DM_REGULATOR)
 		if (!IS_ERR_OR_NULL(priv->vqmmc_dev)) {
 			ret = regulator_set_value(priv->vqmmc_dev, 3300000);
@@ -972,7 +972,8 @@ static int esdhc_set_ios_common(struct fsl_esdhc_priv *priv, struct mmc *mmc)
 	if (priv->signal_voltage != mmc->signal_voltage) {
 		ret = esdhc_set_voltage(mmc);
 		if (ret) {
-			printf("esdhc_set_voltage error %d\n", ret);
+			if (ret != -ENOTSUPP)
+				printf("esdhc_set_voltage error %d\n", ret);
 			return ret;
 		}
 	}
-- 
2.25.1