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Commit c0c88871 authored by Wolfgang Muees's avatar Wolfgang Muees Committed by Pierre Ossman
Browse files

mmc_spi: allow higher timeouts for SPI mode 



Some SD cards have very high timeouts in SPI mode.
So adjust the timeouts from theory to practice.

Signed-off-by: default avatarWolfgang Muees <wolfgang.mues@auerswald.de>
Acked-by: default avatarDavid Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: default avatarPierre Ossman <drzeus@drzeus.cx>
parent ea15ba5c

drivers/mmc/core/core.c

+15 −0
Original line number Diff line number Diff line
@@ -297,6 +297,21 @@ void mmc_set_data_timeout(struct mmc_data *data, const struct mmc_card *card) 
			data->timeout_clks = 0;

		}

	}

	/*

	 * Some cards need very high timeouts if driven in SPI mode.

	 * The worst observed timeout was 900ms after writing a

	 * continuous stream of data until the internal logic

	 * overflowed.

	 */

	if (mmc_host_is_spi(card->host)) {

		if (data->flags & MMC_DATA_WRITE) {

			if (data->timeout_ns < 1000000000)

				data->timeout_ns = 1000000000;	/* 1s */

		} else {

			if (data->timeout_ns < 100000000)

				data->timeout_ns =  100000000;	/* 100ms */

		}

	}

}

EXPORT_SYMBOL(mmc_set_data_timeout);