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author | Tushar Behera <tushar.behera@linaro.org> | 2013-01-24 15:41:08 +0530 |
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committer | Wolfram Sang <w.sang@pengutronix.de> | 2013-01-28 05:26:44 +0100 |
commit | d16933b33914a6dff38a4ecbe8edce44a17898e8 (patch) | |
tree | 0f66a465cd863d8acff40ae56dc3eb2ed102ec46 /drivers/i2c | |
parent | 2b255b947f39d9360662abf6667957add6064646 (diff) | |
download | lwn-d16933b33914a6dff38a4ecbe8edce44a17898e8.tar.gz lwn-d16933b33914a6dff38a4ecbe8edce44a17898e8.zip |
i2c: s3c2410: Move location of clk_prepare_enable() call in probe function
In i2c-s3c2410 driver probe, only s3c24xx_i2c_init() needs the I2C clock
to be enabled. Moving clk_prepare_enable() and clk_disable_unprepare()
calls to around this function simplifies the return path of probe call.
Signed-off-by: Tushar Behera <tushar.behera@linaro.org>
Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
Diffstat (limited to 'drivers/i2c')
-rw-r--r-- | drivers/i2c/busses/i2c-s3c2410.c | 29 |
1 files changed, 12 insertions, 17 deletions
diff --git a/drivers/i2c/busses/i2c-s3c2410.c b/drivers/i2c/busses/i2c-s3c2410.c index 4b6cc130eb71..4d1ba8d7d347 100644 --- a/drivers/i2c/busses/i2c-s3c2410.c +++ b/drivers/i2c/busses/i2c-s3c2410.c @@ -1030,23 +1030,20 @@ static int s3c24xx_i2c_probe(struct platform_device *pdev) dev_dbg(&pdev->dev, "clock source %p\n", i2c->clk); - clk_prepare_enable(i2c->clk); /* map the registers */ res = platform_get_resource(pdev, IORESOURCE_MEM, 0); if (res == NULL) { dev_err(&pdev->dev, "cannot find IO resource\n"); - ret = -ENOENT; - goto err_clk; + return -ENOENT; } i2c->regs = devm_request_and_ioremap(&pdev->dev, res); if (i2c->regs == NULL) { dev_err(&pdev->dev, "cannot request and map IO\n"); - ret = -ENXIO; - goto err_clk; + return -ENXIO; } dev_dbg(&pdev->dev, "registers %p (%p)\n", @@ -1064,16 +1061,18 @@ static int s3c24xx_i2c_probe(struct platform_device *pdev) if (i2c->pdata->cfg_gpio) { i2c->pdata->cfg_gpio(to_platform_device(i2c->dev)); } else if (IS_ERR(i2c->pctrl) && s3c24xx_i2c_parse_dt_gpio(i2c)) { - ret = -EINVAL; - goto err_clk; + return -EINVAL; } /* initialise the i2c controller */ + clk_prepare_enable(i2c->clk); ret = s3c24xx_i2c_init(i2c); - if (ret != 0) - goto err_clk; - + clk_disable_unprepare(i2c->clk); + if (ret != 0) { + dev_err(&pdev->dev, "I2C controller init failed\n"); + return ret; + } /* find the IRQ for this unit (note, this relies on the init call to * ensure no current IRQs pending */ @@ -1081,7 +1080,7 @@ static int s3c24xx_i2c_probe(struct platform_device *pdev) i2c->irq = ret = platform_get_irq(pdev, 0); if (ret <= 0) { dev_err(&pdev->dev, "cannot find IRQ\n"); - goto err_clk; + return ret; } ret = devm_request_irq(&pdev->dev, i2c->irq, s3c24xx_i2c_irq, 0, @@ -1089,13 +1088,13 @@ static int s3c24xx_i2c_probe(struct platform_device *pdev) if (ret != 0) { dev_err(&pdev->dev, "cannot claim IRQ %d\n", i2c->irq); - goto err_clk; + return ret; } ret = s3c24xx_i2c_register_cpufreq(i2c); if (ret < 0) { dev_err(&pdev->dev, "failed to register cpufreq notifier\n"); - goto err_clk; + return ret; } /* Note, previous versions of the driver used i2c_add_adapter() @@ -1120,14 +1119,10 @@ static int s3c24xx_i2c_probe(struct platform_device *pdev) pm_runtime_enable(&i2c->adap.dev); dev_info(&pdev->dev, "%s: S3C I2C adapter\n", dev_name(&i2c->adap.dev)); - clk_disable_unprepare(i2c->clk); return 0; err_cpufreq: s3c24xx_i2c_deregister_cpufreq(i2c); - - err_clk: - clk_disable_unprepare(i2c->clk); return ret; } |