Enable the driver to reset the device itself.
Signed-off-by: Lucas Stach <dev@xxxxxxxxxx>
---
drivers/mci/tegra-sdmmc.c | 9 +++++++++
1 file changed, 9 insertions(+)
diff --git a/drivers/mci/tegra-sdmmc.c b/drivers/mci/tegra-sdmmc.c
index e4d82197bde7..0ea0b5ca4a92 100644
--- a/drivers/mci/tegra-sdmmc.c
+++ b/drivers/mci/tegra-sdmmc.c
@@ -28,6 +28,7 @@
#include <mci.h>
#include <of_gpio.h>
#include <linux/clk.h>
+#include <linux/reset.h>
#include "sdhci.h"
@@ -62,6 +63,7 @@ struct tegra_sdmmc_host {
struct mci_host mci;
void __iomem *regs;
struct clk *clk;
+ struct reset_control *reset;
int gpio_cd, gpio_pwr;
};
#define to_tegra_sdmmc_host(mci) container_of(mci, struct tegra_sdmmc_host, mci)
@@ -400,6 +402,10 @@ static int tegra_sdmmc_probe(struct device_d *dev)
if (IS_ERR(host->clk))
return PTR_ERR(host->clk);
+ host->reset = reset_control_get(dev, NULL);
+ if (IS_ERR(host->reset))
+ return PTR_ERR(host->reset);
+
host->regs = dev_request_mem_region(dev, 0);
if (!host->regs) {
dev_err(dev, "could not get iomem region\n");
@@ -430,6 +436,9 @@ static int tegra_sdmmc_probe(struct device_d *dev)
}
clk_enable(host->clk);
+ reset_control_assert(host->reset);
+ udelay(2);
+ reset_control_deassert(host->reset);
mci->init = tegra_sdmmc_init;
mci->card_present = tegra_sdmmc_card_present;
--
1.9.0
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