mmc: fsl_esdhc: Gracefully fail on unsupported voltage switch

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@denx.de>
Cc: Fabio Estevam <fabio.estevam@nxp.com>
Cc: Jaehoon Chung <jh80.chung@samsung.com>
Cc: Peng Fan <peng.fan@nxp.com>
Cc: Stefano Babic <sbabic@denx.de>
Reviewed-by: Jaehoon Chung <jh80.chung@samsung.com>

diff --git a/drivers/mmc/fsl_esdhc_imx.c b/drivers/mmc/fsl_esdhc_imx.c
index f3101a061abb8b4d5ca0c09eff70fab646e4656d..f42e01843434127bca39026bff05e5e27f271a2c 100644 (file)
--- 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;
                }
        }