[PATCH 1/2] i2c: designware: register clkdev during acpi device configuration
From: Ken Xue
Date: Tue Oct 20 2015 - 02:59:13 EST
DW I2C driver tries to register a clk from id->driver_data as an
alternative way besides intel lpss. But code doesn't register the
clk to clkdev. So, devm_clk_get will fail during probe.
The patch can fix this issue.
Signed-off-by: Ken Xue <Ken.Xue@xxxxxxx>
Signed-off-by: Xiangliang Yu <Xiangliang.Yu@xxxxxxx>
Cc: stable@xxxxxxxxxxxxxxx
---
drivers/i2c/busses/i2c-designware-platdrv.c | 10 +++++++---
1 file changed, 7 insertions(+), 3 deletions(-)
diff --git a/drivers/i2c/busses/i2c-designware-platdrv.c b/drivers/i2c/busses/i2c-designware-platdrv.c
index 3dd2de3..9ee1fc6 100644
--- a/drivers/i2c/busses/i2c-designware-platdrv.c
+++ b/drivers/i2c/busses/i2c-designware-platdrv.c
@@ -27,6 +27,7 @@
#include <linux/i2c.h>
#include <linux/clk.h>
#include <linux/clk-provider.h>
+#include <linux/clkdev.h>
#include <linux/errno.h>
#include <linux/sched.h>
#include <linux/err.h>
@@ -78,6 +79,7 @@ static int dw_i2c_acpi_configure(struct platform_device *pdev)
{
struct dw_i2c_dev *dev = platform_get_drvdata(pdev);
const struct acpi_device_id *id;
+ struct clk *clk;
dev->adapter.nr = -1;
dev->tx_fifo_depth = 32;
@@ -97,9 +99,11 @@ static int dw_i2c_acpi_configure(struct platform_device *pdev)
* id->driver_data.
*/
id = acpi_match_device(pdev->dev.driver->acpi_match_table, &pdev->dev);
- if (id && id->driver_data)
- clk_register_fixed_rate(&pdev->dev, dev_name(&pdev->dev), NULL,
- CLK_IS_ROOT, id->driver_data);
+ if (id && id->driver_data) {
+ clk = clk_register_fixed_rate(&pdev->dev, dev_name(&pdev->dev),
+ NULL, CLK_IS_ROOT, id->driver_data);
+ clk_register_clkdev(clk, NULL, dev_name(&pdev->dev));
+ }
return 0;
}
--
1.9.1
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/