diff mbox series

[2/2] mmc: meson-gx: add device reset

Message ID 20180515095748.6794-3-jbrunet@baylibre.com
State Accepted
Commit 19c6beaa064c4b198e7d774feab7a0851cf606a0
Headers show
Series [1/2] dt-bindings: mmc: meson-gx: add reset | expand

Commit Message

Jerome Brunet May 15, 2018, 9:57 a.m. UTC 
Trigger the reset line of the mmc controller while probing, if available.
The reset should be optional for now, at least until all related DT nodes
have the reset property.

Reviewed-by: Kevin Hilman <khilman@baylibre.com>

Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>

---
 drivers/mmc/host/meson-gx-mmc.c | 9 +++++++++
 1 file changed, 9 insertions(+)

-- 
2.14.3
diff mbox series

Patch

diff --git a/drivers/mmc/host/meson-gx-mmc.c b/drivers/mmc/host/meson-gx-mmc.c
index 4f972b879fe6..9bca359f7936 100644
--- a/drivers/mmc/host/meson-gx-mmc.c
+++ b/drivers/mmc/host/meson-gx-mmc.c
@@ -35,6 +35,7 @@ 
 #include <linux/clk.h>
 #include <linux/clk-provider.h>
 #include <linux/regulator/consumer.h>
+#include <linux/reset.h>
 #include <linux/interrupt.h>
 #include <linux/bitfield.h>
 #include <linux/pinctrl/consumer.h>
@@ -1184,6 +1185,14 @@  static int meson_mmc_probe(struct platform_device *pdev)
 		goto free_host;
 	}
 
+	ret = device_reset_optional(&pdev->dev);
+	if (ret) {
+		if (ret != -EPROBE_DEFER)
+			dev_err(&pdev->dev, "device reset failed: %d\n", ret);
+
+		return ret;
+	}
+
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 	host->regs = devm_ioremap_resource(&pdev->dev, res);
 	if (IS_ERR(host->regs)) {