diff options
| author | Jingchang Lu <b35083@freescale.com> | 2013-08-07 17:05:37 +0800 |
|---|---|---|
| committer | Wolfram Sang <wsa@the-dreams.de> | 2013-08-15 16:11:41 +0200 |
| commit | 46f2832b9f66b008fb813fe153f27794412fbc4f (patch) | |
| tree | 02d4ff2b6d55bc720ac041223ae5171736d91ac0 /drivers/i2c | |
| parent | d533f0492b6371025a4f88506c7f1828a7a48e81 (diff) | |
| download | linux-46f2832b9f66b008fb813fe153f27794412fbc4f.tar.bz2 | |
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 <b35083@freescale.com>
Reviewed-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
Diffstat (limited to 'drivers/i2c')
| -rw-r--r-- | drivers/i2c/busses/i2c-imx.c | 6 |
1 files changed, 6 insertions, 0 deletions
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", |