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List:       git-commits-head
Subject:    mmc: sunxi: Disable eMMC HS-DDR (MMC_CAP_1_8V_DDR) for Allwinner A80
From:       "Linux Kernel Mailing List" <linux-kernel () vger ! kernel ! org>
Date:       2016-04-30 0:48:59
Message-ID: 20160430004859.B2683660F82 () gitolite ! kernel ! org
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Web:        https://git.kernel.org/torvalds/c/2963070a0f8184fe40be11927344e3fcc7e18e7c
Commit:     2963070a0f8184fe40be11927344e3fcc7e18e7c
Parent:     6e1c7d6103fe7031035cec321307c6356809adf4
Refname:    refs/heads/master
Author:     Chen-Yu Tsai <wens@csie.org>
AuthorDate: Tue Apr 26 23:37:26 2016 +0800
Committer:  Ulf Hansson <ulf.hansson@linaro.org>
CommitDate: Thu Apr 28 11:43:54 2016 +0200

    mmc: sunxi: Disable eMMC HS-DDR (MMC_CAP_1_8V_DDR) for Allwinner A80
    
    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@csie.org>
    Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
---
 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 8372a41..7fc8b7a 100644
--- a/drivers/mmc/host/sunxi-mmc.c
+++ b/drivers/mmc/host/sunxi-mmc.c
@@ -1129,6 +1129,11 @@ static int sunxi_mmc_probe(struct platform_device *pdev)
 				  MMC_CAP_1_8V_DDR |
 				  MMC_CAP_ERASE | MMC_CAP_SDIO_IRQ;
 
+	/* TODO MMC DDR is not working on A80 */
+	if (of_device_is_compatible(pdev->dev.of_node,
+				    "allwinner,sun9i-a80-mmc"))
+		mmc->caps &= ~MMC_CAP_1_8V_DDR;
+
 	ret = mmc_of_parse(mmc);
 	if (ret)
 		goto error_free_dma;
--
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