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| author | Ahmad Fatoum <a.fatoum@pengutronix.de> | 2020-01-30 18:04:47 +0100 |
|---|---|---|
| committer | Sascha Hauer <s.hauer@pengutronix.de> | 2020-02-03 09:16:10 +0100 |
| commit | 88d2f57064e46854ceecede4093fc504597f3c9d (patch) | |
| tree | 8121b5254f937817d119d2573f3f6e0b750dface | |
| parent | ea7d1fd1c68c33906dd77c6d6f85316594862cf8 (diff) | |
| download | barebox-88d2f57064e46854ceecede4093fc504597f3c9d.tar.gz barebox-88d2f57064e46854ceecede4093fc504597f3c9d.tar.xz | |
mci: core: don't test 4-bit-buswidth support if MMC host lacks capability
We already check for MMC_CAP_8_BIT_DATA before trying if buswidth=8
yields legible data. For consistency, don't test whether buswidth=4
works if the MMC host doesn't indicated MMC_CAP_4_BIT_DATA.
Fixes: 68db956d ("mci: Fix 8 bit mmc cards")
Signed-off-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
| -rw-r--r-- | drivers/mci/mci-core.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/mci/mci-core.c b/drivers/mci/mci-core.c index 67257bcd18..dd163c3d16 100644 --- a/drivers/mci/mci-core.c +++ b/drivers/mci/mci-core.c @@ -1025,6 +1025,9 @@ static int mci_startup_mmc(struct mci *mci) mci_set_clock(mci, mci->tran_speed); + if (!(host->host_caps & (MMC_CAP_4_BIT_DATA | MMC_CAP_8_BIT_DATA))) + return 0; + /* * Unlike SD, MMC cards dont have a configuration register to notify * supported bus width. So bus test command should be run to identify |