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Subject[PATCH] mmc: sdhci-cadence: set SDHCI_QUIRK2_PRESET_VALUE_BROKEN for UniPhier
Date
The SDHCI_PRESET_FOR_* registers are not set for the UniPhier platform
integration. (They are all read as zeros).

Set the SDHCI_QUIRK2_PRESET_VALUE_BROKEN quirk flag. Otherwise, the
High Speed DDR mode on the eMMC controller (MMC_TIMING_MMC_DDR52)
would not work.

I split the platform data to give no impact to other platforms,
although the UniPhier platform is currently only the upstream user
of this IP.

The SDHCI_QUIRK2_PRESET_VALUE_BROKEN flag is set if the compatible
string matches to "socionext,uniphier-sd4hc".

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
---

drivers/mmc/host/sdhci-cadence.c | 18 ++++++++++++++++--
1 file changed, 16 insertions(+), 2 deletions(-)

diff --git a/drivers/mmc/host/sdhci-cadence.c b/drivers/mmc/host/sdhci-cadence.c
index 5827d3751b81..e573495f8726 100644
--- a/drivers/mmc/host/sdhci-cadence.c
+++ b/drivers/mmc/host/sdhci-cadence.c
@@ -11,6 +11,7 @@
#include <linux/mmc/host.h>
#include <linux/mmc/mmc.h>
#include <linux/of.h>
+#include <linux/of_device.h>

#include "sdhci-pltfm.h"

@@ -235,6 +236,11 @@ static const struct sdhci_ops sdhci_cdns_ops = {
.set_uhs_signaling = sdhci_cdns_set_uhs_signaling,
};

+static const struct sdhci_pltfm_data sdhci_cdns_uniphier_pltfm_data = {
+ .ops = &sdhci_cdns_ops,
+ .quirks2 = SDHCI_QUIRK2_PRESET_VALUE_BROKEN,
+};
+
static const struct sdhci_pltfm_data sdhci_cdns_pltfm_data = {
.ops = &sdhci_cdns_ops,
};
@@ -334,6 +340,7 @@ static void sdhci_cdns_hs400_enhanced_strobe(struct mmc_host *mmc,
static int sdhci_cdns_probe(struct platform_device *pdev)
{
struct sdhci_host *host;
+ const struct sdhci_pltfm_data *data;
struct sdhci_pltfm_host *pltfm_host;
struct sdhci_cdns_priv *priv;
struct clk *clk;
@@ -350,8 +357,12 @@ static int sdhci_cdns_probe(struct platform_device *pdev)
if (ret)
return ret;

+ data = of_device_get_match_data(dev);
+ if (!data)
+ data = &sdhci_cdns_pltfm_data;
+
nr_phy_params = sdhci_cdns_phy_param_count(dev->of_node);
- host = sdhci_pltfm_init(pdev, &sdhci_cdns_pltfm_data,
+ host = sdhci_pltfm_init(pdev, data,
struct_size(priv, phy_params, nr_phy_params));
if (IS_ERR(host)) {
ret = PTR_ERR(host);
@@ -431,7 +442,10 @@ static const struct dev_pm_ops sdhci_cdns_pm_ops = {
};

static const struct of_device_id sdhci_cdns_match[] = {
- { .compatible = "socionext,uniphier-sd4hc" },
+ {
+ .compatible = "socionext,uniphier-sd4hc",
+ .data = &sdhci_cdns_uniphier_pltfm_data,
+ },
{ .compatible = "cdns,sd4hc" },
{ /* sentinel */ }
};
--
2.17.1
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