From: Chunyan Zhang <zhang.lyra@gmail.com>
To: Ulf Hansson <ulf.hansson@linaro.org>,
Adrian Hunter <adrian.hunter@intel.com>,
Orson Zhai <orsonzhai@gmail.com>,
Baolin Wang <baolin.wang@linaro.org>
Cc: linux-mmc@vger.kernel.org, linux-kernel@vger.kernel.org,
Chunyan Zhang <zhang.lyra@gmail.com>
Subject: [PATCH v2 5/5] mmc: sdhci-sprd: clear the UHS-I modes read from registers
Date: Wed, 28 Aug 2019 10:17:36 +0800 [thread overview]
Message-ID: <20190828021736.22049-6-zhang.lyra@gmail.com> (raw)
In-Reply-To: <20190828021736.22049-1-zhang.lyra@gmail.com>
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
prev parent reply other threads:[~2019-08-28 2:19 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-08-28 2:17 [PATCH v2 0/5] a few fixes for sprd's sd host controller Chunyan Zhang
2019-08-28 2:17 ` [PATCH v2 1/5] mmc: sdhci-sprd: fixed incorrect clock divider Chunyan Zhang
2019-08-28 2:17 ` [PATCH v2 2/5] mmc: sdhci-sprd: add get_ro hook function Chunyan Zhang
2019-08-28 2:17 ` [PATCH v2 3/5] mmc: sdhci-sprd: add SDHCI_QUIRK2_PRESET_VALUE_BROKEN Chunyan Zhang
2019-08-28 2:17 ` [PATCH v2 4/5] mms: sdhci-sprd: add SDHCI_QUIRK_BROKEN_CARD_DETECTION Chunyan Zhang
2019-08-28 2:17 ` Chunyan Zhang [this message]
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