lkml.org 
[lkml]   [2019]   [Aug]   [27]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH v2 5/5] mmc: sdhci-sprd: clear the UHS-I modes read from registers
Date
From: Chunyan Zhang <chunyan.zhang@unisoc.com>

sprd's sd host controller supports SDR50/SDR104/DDR50 though, the UHS-I
mode used by the specific card can be selected via devicetree only.

Fixes: fb8bd90f83c4 ("mmc: sdhci-sprd: Add Spreadtrum's initial host
controller")
Signed-off-by: Chunyan Zhang <chunyan.zhang@unisoc.com>
Signed-off-by: Chunyan Zhang <zhang.lyra@gmail.com>
Reviewed-by: Baolin Wang <baolin.wang@linaro.org>
Tested-by: Baolin Wang <baolin.wang@linaro.org>
---
drivers/mmc/host/sdhci-sprd.c | 13 ++++++++++++-
1 file changed, 12 insertions(+), 1 deletion(-)

diff --git a/drivers/mmc/host/sdhci-sprd.c b/drivers/mmc/host/sdhci-sprd.c
index 1fecf055682c..d3c3e95676f0 100644
--- a/drivers/mmc/host/sdhci-sprd.c
+++ b/drivers/mmc/host/sdhci-sprd.c
@@ -509,7 +509,8 @@ static void sdhci_sprd_phy_param_parse(struct sdhci_sprd_host *sprd_host,

static const struct sdhci_pltfm_data sdhci_sprd_pdata = {
.quirks = SDHCI_QUIRK_BROKEN_CARD_DETECTION |
- SDHCI_QUIRK_DATA_TIMEOUT_USES_SDCLK,
+ SDHCI_QUIRK_DATA_TIMEOUT_USES_SDCLK |
+ SDHCI_QUIRK_MISSING_CAPS,
.quirks2 = SDHCI_QUIRK2_BROKEN_HS200 |
SDHCI_QUIRK2_USE_32BIT_BLK_CNT |
SDHCI_QUIRK2_PRESET_VALUE_BROKEN,
@@ -614,6 +615,16 @@ static int sdhci_sprd_probe(struct platform_device *pdev)

sdhci_enable_v4_mode(host);

+ /*
+ * Supply the existing CAPS, but clear the UHS-I modes. This
+ * will allow these modes to be specified only by device
+ * tree properties through mmc_of_parse().
+ */
+ host->caps = sdhci_readl(host, SDHCI_CAPABILITIES);
+ host->caps1 = sdhci_readl(host, SDHCI_CAPABILITIES_1);
+ host->caps1 &= ~(SDHCI_SUPPORT_SDR50 | SDHCI_SUPPORT_SDR104 |
+ SDHCI_SUPPORT_DDR50);
+
ret = sdhci_setup_host(host);
if (ret)
goto pm_runtime_disable;
--
2.20.1
\
 
 \ /
  Last update: 2019-08-28 04:19    [W:0.054 / U:0.464 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site