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| author | Robert Marko <robert.marko@sartura.hr> | 2022-03-11 19:14:07 +0100 |
|---|---|---|
| committer | Jaehoon Chung <jh80.chung@samsung.com> | 2022-03-16 16:47:37 +0900 |
| commit | 0f3466f52fbacce67e147b9234e6323edff26a6d (patch) | |
| tree | 7d4bfa9515c97f52b4c97d6f00ed10cf725a5781 /drivers | |
| parent | 84191f73847c351019bb50728d28220d91b0aee4 (diff) | |
| download | u-boot-0f3466f52fbacce67e147b9234e6323edff26a6d.zip u-boot-0f3466f52fbacce67e147b9234e6323edff26a6d.tar.gz u-boot-0f3466f52fbacce67e147b9234e6323edff26a6d.tar.bz2 | |
mmc: xenon_sdhci: remove wait_dat0 SDHCI OP
Generic SDHCI driver received support for checking the busy status by
polling the DAT[0] level instead of waiting for the worst MMC switch time.
Unfortunately, it appears that this does not work for Xenon controllers
despite being a part of the standard SDHCI registers and the Armada 3720
datasheet itself telling that BIT(20) is useful for detecting the DAT[0]
busy signal.
I have tried increasing the timeout value, but I have newer managed to
catch DAT_LEVEL bits change from 0 at all.
This issue appears to hit most if not all SoC-s supported by Xenon driver,
at least A3720, A8040 and CN9130 have non working eMMC currently.
So, until a better solution is found drop the wait_dat0 OP for Xenon.
I was able to only test it on A3720, but it should work for others as well.
Fixes: 40e6f52454fc ("drivers: mmc: Add wait_dat0 support for sdhci driver")
Signed-off-by: Robert Marko <robert.marko@sartura.hr>
Reviewed-by: Marek Behún <marek.behun@nic.cz>
Reviewed-by: Jaehoon Chung <jh80.chung@samsung.com>
Reviewed-by: Stefan Roese <sr@denx.de>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/mmc/xenon_sdhci.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/drivers/mmc/xenon_sdhci.c b/drivers/mmc/xenon_sdhci.c index e292f29..2f88050 100644 --- a/drivers/mmc/xenon_sdhci.c +++ b/drivers/mmc/xenon_sdhci.c @@ -439,6 +439,8 @@ static const struct sdhci_ops xenon_sdhci_ops = { .set_ios_post = xenon_sdhci_set_ios_post }; +static struct dm_mmc_ops xenon_mmc_ops; + static int xenon_sdhci_probe(struct udevice *dev) { struct xenon_sdhci_plat *plat = dev_get_plat(dev); @@ -452,6 +454,9 @@ static int xenon_sdhci_probe(struct udevice *dev) host->mmc->dev = dev; upriv->mmc = host->mmc; + xenon_mmc_ops = sdhci_ops; + xenon_mmc_ops.wait_dat0 = NULL; + /* Set quirks */ host->quirks = SDHCI_QUIRK_WAIT_SEND_CMD | SDHCI_QUIRK_32BIT_DMA_ADDR; @@ -568,7 +573,7 @@ U_BOOT_DRIVER(xenon_sdhci_drv) = { .id = UCLASS_MMC, .of_match = xenon_sdhci_ids, .of_to_plat = xenon_sdhci_of_to_plat, - .ops = &sdhci_ops, + .ops = &xenon_mmc_ops, .bind = xenon_sdhci_bind, .probe = xenon_sdhci_probe, .remove = xenon_sdhci_remove, |