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i2c: imx: enable clk before write to registers

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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@freescale.com>
Reviewed-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
This commit is contained in:
Jingchang Lu 2013-08-07 17:05:37 +08:00 committed by Wolfram Sang
parent d533f0492b
commit 46f2832b9f
1 changed files with 6 additions and 0 deletions
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6
drivers/i2c/busses/i2c-imx.c
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@ -543,6 +543,11 @@ static int __init i2c_imx_probe(struct platform_device *pdev)
return PTR_ERR(i2c_imx->clk); 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 */ /* Request IRQ */
ret = devm_request_irq(&pdev->dev, irq, i2c_imx_isr, 0, ret = devm_request_irq(&pdev->dev, irq, i2c_imx_isr, 0,
pdev->name, i2c_imx); pdev->name, i2c_imx);
@ -580,6 +585,7 @@ static int __init i2c_imx_probe(struct platform_device *pdev)
/* Set up platform driver data */ /* Set up platform driver data */
platform_set_drvdata(pdev, i2c_imx); 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, "claimed irq %d\n", irq);
dev_dbg(&i2c_imx->adapter.dev, "device resources from 0x%x to 0x%x\n", dev_dbg(&i2c_imx->adapter.dev, "device resources from 0x%x to 0x%x\n",