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Merge branch 'master' of https://source.denx.de/u-boot/custodians/u-boot-sunxi

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- a fix for U-Boot 2021.10 to bring back MMC boot on older boards.
This commit is contained in:
Tom Rini
2021-09-13 21:03:36 -04:00
parent eafcaf8a6e 0b508ca821
commit 5c25757326
1 changed files with 7 additions and 3 deletions
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10
drivers/mmc/sunxi_mmc.c
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@@ -349,10 +349,14 @@ static int mmc_trans_data_by_cpu(struct sunxi_mmc_priv *priv, struct mmc *mmc,
* register without checking the status register after every
* read. That saves half of the costly MMIO reads, effectively
* doubling the read performance.
* Some SoCs (A20) report a level of 0 if the FIFO is
* completely full (value masked out?). Use a safe minimal
* FIFO size in this case.
*/
for (in_fifo = SUNXI_MMC_STATUS_FIFO_LEVEL(status);
in_fifo > 0;
in_fifo--)
in_fifo = SUNXI_MMC_STATUS_FIFO_LEVEL(status);
if (in_fifo == 0 && (status & SUNXI_MMC_STATUS_FIFO_FULL))
in_fifo = 32;
for (; in_fifo > 0; in_fifo--)
buff[i++] = readl_relaxed(&priv->reg->fifo);
dmb();
}