[PATCH] mmc: sunxi: Disable eMMC HS-DDR (MMC_CAP_1_8V_DDR) for Allwinner A80
wens at csie.org
Tue Apr 26 08:37:26 PDT 2016
eMMC HS-DDR no longer works on the A80, despite it working when support
for this developed.
Disable it for now.
Signed-off-by: Chen-Yu Tsai <wens at csie.org>
When i worked on this it was working, but now it isn't. Unfortunately I
don't have my old tree to do a proper bisect. I probably won't have time
to dig into this issue before v4.6 release, so it's best to disable it
on the A80 for now.
drivers/mmc/host/sunxi-mmc.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/drivers/mmc/host/sunxi-mmc.c b/drivers/mmc/host/sunxi-mmc.c
index 8372a413848c..7fc8b7aa83f0 100644
@@ -1129,6 +1129,11 @@ static int sunxi_mmc_probe(struct platform_device *pdev)
MMC_CAP_ERASE | MMC_CAP_SDIO_IRQ;
+ /* TODO MMC DDR is not working on A80 */
+ if (of_device_is_compatible(pdev->dev.of_node,
+ mmc->caps &= ~MMC_CAP_1_8V_DDR;
ret = mmc_of_parse(mmc);
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