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Diffstat (limited to 'drivers/mmc/core/core.c')
| -rw-r--r-- | drivers/mmc/core/core.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/drivers/mmc/core/core.c b/drivers/mmc/core/core.c index 11907e15e5f..214ace6b905 100644 --- a/drivers/mmc/core/core.c +++ b/drivers/mmc/core/core.c @@ -471,6 +471,18 @@ void mmc_set_data_timeout(struct mmc_data *data, const struct mmc_card *card) data->timeout_clks = 0; } } + + /* + * Some cards require longer data read timeout than indicated in CSD. + * Address this by setting the read timeout to a "reasonably high" + * value. For the cards tested, 300ms has proven enough. If necessary, + * this value can be increased if other problematic cards require this. + */ + if (mmc_card_long_read_time(card) && data->flags & MMC_DATA_READ) { + data->timeout_ns = 300000000; + data->timeout_clks = 0; + } + /* * Some cards need very high timeouts if driven in SPI mode. * The worst observed timeout was 900ms after writing a |