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-rw-r--r--drivers/mmc/host/sdhci-st.c60
1 files changed, 57 insertions, 3 deletions
diff --git a/drivers/mmc/host/sdhci-st.c b/drivers/mmc/host/sdhci-st.c
index a80de9305c4b..74213b0bc94f 100644
--- a/drivers/mmc/host/sdhci-st.c
+++ b/drivers/mmc/host/sdhci-st.c
@@ -23,9 +23,14 @@
#include <linux/module.h>
#include <linux/err.h>
#include <linux/mmc/host.h>
-
+#include <linux/reset.h>
#include "sdhci-pltfm.h"
+struct st_mmc_platform_data {
+ struct reset_control *rstc;
+ void __iomem *top_ioaddr;
+};
+
/* MMCSS glue logic to setup the HC on some ST SoCs (e.g. STiH407 family) */
#define ST_MMC_CCONFIG_REG_1 0x400
@@ -151,10 +156,16 @@ static const struct sdhci_pltfm_data sdhci_st_pdata = {
static int sdhci_st_probe(struct platform_device *pdev)
{
struct sdhci_host *host;
+ struct st_mmc_platform_data *pdata;
struct sdhci_pltfm_host *pltfm_host;
struct clk *clk;
int ret = 0;
u16 host_version;
+ struct resource *res;
+
+ pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
+ if (!pdata)
+ return -ENOMEM;
clk = devm_clk_get(&pdev->dev, "mmc");
if (IS_ERR(clk)) {
@@ -162,10 +173,17 @@ static int sdhci_st_probe(struct platform_device *pdev)
return PTR_ERR(clk);
}
+ pdata->rstc = devm_reset_control_get(&pdev->dev, NULL);
+ if (IS_ERR(pdata->rstc))
+ pdata->rstc = NULL;
+ else
+ reset_control_deassert(pdata->rstc);
+
host = sdhci_pltfm_init(pdev, &sdhci_st_pdata, 0);
if (IS_ERR(host)) {
dev_err(&pdev->dev, "Failed sdhci_pltfm_init\n");
- return PTR_ERR(host);
+ ret = PTR_ERR(host);
+ goto err_pltfm_init;
}
ret = mmc_of_parse(host->mmc);
@@ -176,7 +194,17 @@ static int sdhci_st_probe(struct platform_device *pdev)
clk_prepare_enable(clk);
+ /* Configure the FlashSS Top registers for setting eMMC TX/RX delay */
+ res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
+ "top-mmc-delay");
+ pdata->top_ioaddr = devm_ioremap_resource(&pdev->dev, res);
+ if (IS_ERR(pdata->top_ioaddr)) {
+ dev_warn(&pdev->dev, "FlashSS Top Dly registers not available");
+ pdata->top_ioaddr = NULL;
+ }
+
pltfm_host = sdhci_priv(host);
+ pltfm_host->priv = pdata;
pltfm_host->clk = clk;
ret = sdhci_add_host(host);
@@ -200,6 +228,24 @@ err_out:
clk_disable_unprepare(clk);
err_of:
sdhci_pltfm_free(pdev);
+err_pltfm_init:
+ if (pdata->rstc)
+ reset_control_assert(pdata->rstc);
+
+ return ret;
+}
+
+static int sdhci_st_remove(struct platform_device *pdev)
+{
+ struct sdhci_host *host = platform_get_drvdata(pdev);
+ struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+ struct st_mmc_platform_data *pdata = pltfm_host->priv;
+ int ret;
+
+ ret = sdhci_pltfm_unregister(pdev);
+
+ if (pdata->rstc)
+ reset_control_assert(pdata->rstc);
return ret;
}
@@ -209,11 +255,15 @@ static int sdhci_st_suspend(struct device *dev)
{
struct sdhci_host *host = dev_get_drvdata(dev);
struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+ struct st_mmc_platform_data *pdata = pltfm_host->priv;
int ret = sdhci_suspend_host(host);
if (ret)
goto out;
+ if (pdata->rstc)
+ reset_control_assert(pdata->rstc);
+
clk_disable_unprepare(pltfm_host->clk);
out:
return ret;
@@ -223,9 +273,13 @@ static int sdhci_st_resume(struct device *dev)
{
struct sdhci_host *host = dev_get_drvdata(dev);
struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+ struct st_mmc_platform_data *pdata = pltfm_host->priv;
clk_prepare_enable(pltfm_host->clk);
+ if (pdata->rstc)
+ reset_control_deassert(pdata->rstc);
+
return sdhci_resume_host(host);
}
#endif
@@ -241,7 +295,7 @@ MODULE_DEVICE_TABLE(of, st_sdhci_match);
static struct platform_driver sdhci_st_driver = {
.probe = sdhci_st_probe,
- .remove = sdhci_pltfm_unregister,
+ .remove = sdhci_st_remove,
.driver = {
.name = "sdhci-st",
.pm = &sdhci_st_pmops,