mmc: mmci: De-assert reset on probe

If we find a reset handle when probing the MMCI block, make sure the reset is de-asserted. It could happen that a hardware has reset asserted at boot. Cc: Russell King <[email protected]> Cc: Yann Gautier <[email protected]> Cc: Ludovic Barre <[email protected]> Signed-off-by: Linus Walleij <[email protected]> Tested-by: Yann Gautier <[email protected]> Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Ulf Hansson <[email protected]>
kawasaki · Aug 24, 2021 · 575cf10 · 575cf10
1 parent 29cef6d
commit 575cf10
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/drivers/mmc/host/mmci.c b/drivers/mmc/host/mmci.c
@@ -2126,6 +2126,9 @@ static int mmci_probe(struct amba_device *dev,
 		ret = PTR_ERR(host->rst);
 		goto clk_disable;
 	}
+	ret = reset_control_deassert(host->rst);
+	if (ret)
+		dev_err(mmc_dev(mmc), "failed to de-assert reset\n");
 
 	/* Get regulators and the supported OCR mask */
 	ret = mmc_regulator_get_supply(mmc);