The module clk should be enabled before write to
its register in probe(), and the clk can be disabled
after.
Signed-off-by: Jingchang Lu <b35083@xxxxxxxxxxxxx>
---
drivers/i2c/busses/i2c-imx.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/drivers/i2c/busses/i2c-imx.c b/drivers/i2c/busses/i2c-imx.c
index 9167d43..7adb351 100644
--- a/drivers/i2c/busses/i2c-imx.c
+++ b/drivers/i2c/busses/i2c-imx.c
@@ -543,6 +543,11 @@ static int __init i2c_imx_probe(struct platform_device *pdev)
return PTR_ERR(i2c_imx->clk);
}
+ ret = clk_prepare_enable(i2c_imx->clk);
+ if (ret) {
+ dev_err(&pdev->dev, "can't enable I2C clock\n");
+ return ret;
+ }
/* Request IRQ */
ret = devm_request_irq(&pdev->dev, irq, i2c_imx_isr, 0,
pdev->name, i2c_imx);
@@ -580,6 +585,7 @@ static int __init i2c_imx_probe(struct platform_device *pdev)
/* Set up platform driver data */
platform_set_drvdata(pdev, i2c_imx);
+ clk_disable_unprepare(i2c_imx->clk);
dev_dbg(&i2c_imx->adapter.dev, "claimed irq %d\n", irq);
dev_dbg(&i2c_imx->adapter.dev, "device resources from 0x%x to 0x%x\n",
--
1.8.0
--
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