i2c: i2c-cros-ec-tunnel: Set retries to 3

Since the i2c bus can get wedged on the EC sometimes, set the number of retries
to 3. Since we un-wedge the bus immediately after the wedge happens, this is the
correct fix since only one transfer will fail.

Signed-off-by: Derek Basehore <dbasehore@chromium.org>
Reviewed-by: Doug Anderson <dianders@chromium.org>
Acked-by: Wolfram Sang <wsa@the-dreams.de>
Signed-off-by: Javier Martinez Canillas <javier.martinez@collabora.co.uk>
Signed-off-by: Lee Jones <lee.jones@linaro.org>

diff --git a/drivers/i2c/busses/i2c-cros-ec-tunnel.c b/drivers/i2c/busses/i2c-cros-ec-tunnel.c
index 43be23dfb1150447bdd067969cc716cd1c1700fc..8ca5cbbcec915072cfa8a8de4d9d8df7c708dd82 100644 (file)
--- a/drivers/i2c/busses/i2c-cros-ec-tunnel.c
+++ b/drivers/i2c/busses/i2c-cros-ec-tunnel.c
@@ -16,6 +16,8 @@
 #include <linux/platform_device.h>
 #include <linux/slab.h>
 
+#define I2C_MAX_RETRIES 3
+
 /**
  * struct ec_i2c_device - Driver data for I2C tunnel
  *
@@ -290,6 +292,7 @@ static int ec_i2c_probe(struct platform_device *pdev)
        bus->adap.algo_data = bus;
        bus->adap.dev.parent = &pdev->dev;
        bus->adap.dev.of_node = np;
+       bus->adap.retries = I2C_MAX_RETRIES;
 
        err = i2c_add_adapter(&bus->adap);
        if (err) {