Some AllWinner MMC driver fixes

1 files changed, 81 insertions, 0 deletions

diff --git a/mmc-sunxi-allow-3.3V-DDR-when-DDR-is-available.patch b/mmc-sunxi-allow-3.3V-DDR-when-DDR-is-available.patch
new file mode 100644
index 000000000..45016ef6a
--- /dev/null
+++ b/mmc-sunxi-allow-3.3V-DDR-when-DDR-is-available.patch
@@ -0,0 +1,81 @@
+From patchwork Sun Jul 22 12:54:07 2018
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+From: Icenowy Zheng <icenowy@aosc.io>
+To: Ulf Hansson <ulf.hansson@linaro.org>,
+        Maxime Ripard <maxime.ripard@bootlin.com>,
+        Chen-Yu Tsai <wens@csie.org>
+Cc: linux-mmc@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
+        linux-kernel@vger.kernel.org, linux-sunxi@googlegroups.com,
+        Icenowy Zheng <icenowy@aosc.io>
+Subject: [PATCH] mmc: sunxi: allow 3.3V DDR when DDR is available
+Date: Sun, 22 Jul 2018 20:54:07 +0800
+Message-Id: <20180722125407.43107-1-icenowy@aosc.io>
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+
+Some Allwinner boards feature an on-board eMMC with fixed 3.3V voltage
+(e.g. Banana Pi M2+), and in this case both the eMMC and the SoC are
+capable of doing 3.3V DDR transmission.
+
+Add capability of 3.3V DDR when DDR is available (extra clock or new
+timing).
+
+Signed-off-by: Icenowy Zheng <icenowy@aosc.io>
+Acked-by: Maxime Ripard <maxime.ripard@bootlin.com>
+---
+ drivers/mmc/host/sunxi-mmc.c | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/drivers/mmc/host/sunxi-mmc.c b/drivers/mmc/host/sunxi-mmc.c
+index 8e7f3e35ee3d..4ea8e2611079 100644
+--- a/drivers/mmc/host/sunxi-mmc.c
++++ b/drivers/mmc/host/sunxi-mmc.c
+@@ -1388,7 +1388,7 @@ static int sunxi_mmc_probe(struct platform_device *pdev)
+ 				  MMC_CAP_ERASE | MMC_CAP_SDIO_IRQ;
+ 
+ 	if (host->cfg->clk_delays || host->use_new_timings)
+-		mmc->caps      |= MMC_CAP_1_8V_DDR;
++		mmc->caps      |= MMC_CAP_1_8V_DDR | MMC_CAP_3_3V_DDR;
+ 
+ 	ret = mmc_of_parse(mmc);
+ 	if (ret)