If the return value is all 0xff, it means there's no device.
Signed-off-by: Kyungmin Park <kyungmin.park@xxxxxxxxxxx>
---
diff --git a/drivers/spi/tsc210x.c b/drivers/spi/tsc210x.c
index df8bcf9..1d2ac94 100644
--- a/drivers/spi/tsc210x.c
+++ b/drivers/spi/tsc210x.c
@@ -1092,6 +1092,11 @@ static int tsc210x_probe(struct spi_device *spi, enum tsc_type type)
dev_dbg(&dev->spi->dev, "revision, err %d\n", err);
goto err_spi;
}
+ if (reg == 0xffff) {
+ err = -ENODEV;
+ dev_dbg(&dev->spi->dev, "no device, err %d\n", err);
+ goto err_spi;
+ }
dev_info(&spi->dev, "rev %d, irq %d\n", reg & 0x0007, spi->irq);
err = tsc210x_configure(dev);
--
To unsubscribe from this list: send the line "unsubscribe linux-omap" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
