From: Jingchang Lu Date: Wed, 7 Aug 2013 09:05:37 +0000 (+0800) Subject: i2c: imx: enable clk before write to registers X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=46f2832b9f66b008fb813fe153f27794412fbc4f;p=linux-beck.git i2c: imx: enable clk before write to registers 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 Reviewed-by: Sascha Hauer Signed-off-by: Wolfram Sang --- diff --git a/drivers/i2c/busses/i2c-imx.c b/drivers/i2c/busses/i2c-imx.c index 9167d4332d77..7adb35115d95 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",