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Commit 3bfa6f03 authored by Scott Branden's avatar Scott Branden Committed by Ulf Hansson

mmc: sdhci: add quirk for ACMD23 broken

Add quirk to handle broken auto-CMD23.
Some controllers do not respond after the first auto-CMD23 is issued.

This allows CMD23 to still work (mandatory for the faster UHS-I mode)
rather than disabling CMD23 entirely via SDHCI_QUIRK2_HOST_NO_CMD23.

Signed-off by: Corneliu Doban <>
Signed-off-by: default avatarScott Branden <>
Signed-off-by: default avatarUlf Hansson <>
parent eeed7026
......@@ -3164,7 +3164,8 @@ int sdhci_add_host(struct sdhci_host *host)
/* Auto-CMD23 stuff only works in ADMA or PIO. */
if ((host->version >= SDHCI_SPEC_300) &&
((host->flags & SDHCI_USE_ADMA) ||
!(host->flags & SDHCI_USE_SDMA))) {
!(host->flags & SDHCI_USE_SDMA)) &&
!(host->quirks2 & SDHCI_QUIRK2_ACMD23_BROKEN)) {
host->flags |= SDHCI_AUTO_CMD23;
DBG("%s: Auto-CMD23 available\n", mmc_hostname(mmc));
} else {
......@@ -115,6 +115,8 @@ struct sdhci_host {
/* disable the block count for single block transactions */
/* Controller broken with using ACMD23 */
#define SDHCI_QUIRK2_ACMD23_BROKEN (1<<14)
int irq; /* Device IRQ */
void __iomem *ioaddr; /* Mapped address */
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