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Date: Fri, 23 Nov 2012 14:11:53 +0530
From: Tushar Behera <tushar.behera@...aro.org>
To: linux-kernel@...r.kernel.org, linux-i2c@...r.kernel.org,
linux-samsung-soc@...r.kernel.org
Cc: w.sang@...gutronix.de, kgene.kim@...sung.com, patches@...aro.org
Subject: [PATCH V2 2/4] i2c: s3c2410: Convert to use devm_* APIs
i2c-s3c2410 driver is modified to use devm_clk_get(),
devm_request_and_ioremap() (combining request_mem_region() and
ioremap()) and devm_request_irq(). This also simplifies the
return path in driver's probe.
Signed-off-by: Tushar Behera <tushar.behera@...aro.org>
---
Changes since V1:
* devm_request_mem_region and devm_ioremap calls were replaced by
devm_request_and_ioremap() call.
* All devm_* related modifications (earlier patches 2-5) were merged
to a single patch.
drivers/i2c/busses/i2c-s3c2410.c | 51 +++++++++-----------------------------
1 files changed, 12 insertions(+), 39 deletions(-)
diff --git a/drivers/i2c/busses/i2c-s3c2410.c b/drivers/i2c/busses/i2c-s3c2410.c
index 7522f40..a203917 100644
--- a/drivers/i2c/busses/i2c-s3c2410.c
+++ b/drivers/i2c/busses/i2c-s3c2410.c
@@ -78,7 +78,6 @@ struct s3c24xx_i2c {
void __iomem *regs;
struct clk *clk;
struct device *dev;
- struct resource *ioarea;
struct i2c_adapter adap;
struct s3c2410_platform_i2c *pdata;
@@ -968,7 +967,7 @@ static int s3c24xx_i2c_probe(struct platform_device *pdev)
/* find the clock and enable it */
i2c->dev = &pdev->dev;
- i2c->clk = clk_get(&pdev->dev, "i2c");
+ i2c->clk = devm_clk_get(&pdev->dev, "i2c");
if (IS_ERR(i2c->clk)) {
dev_err(&pdev->dev, "cannot get clock\n");
return -ENOENT;
@@ -987,25 +986,16 @@ static int s3c24xx_i2c_probe(struct platform_device *pdev)
goto err_clk;
}
- i2c->ioarea = request_mem_region(res->start, resource_size(res),
- pdev->name);
-
- if (i2c->ioarea == NULL) {
- dev_err(&pdev->dev, "cannot request IO\n");
- ret = -ENXIO;
- goto err_clk;
- }
-
- i2c->regs = ioremap(res->start, resource_size(res));
+ i2c->regs = devm_request_and_ioremap(&pdev->dev, res);
if (i2c->regs == NULL) {
- dev_err(&pdev->dev, "cannot map IO\n");
+ dev_err(&pdev->dev, "cannot request and map IO\n");
ret = -ENXIO;
- goto err_ioarea;
+ goto err_clk;
}
- dev_dbg(&pdev->dev, "registers %p (%p, %p)\n",
- i2c->regs, i2c->ioarea, res);
+ dev_dbg(&pdev->dev, "registers %p (%p)\n",
+ i2c->regs, res);
/* setup info block for the i2c core */
@@ -1016,7 +1006,7 @@ static int s3c24xx_i2c_probe(struct platform_device *pdev)
ret = s3c24xx_i2c_init(i2c);
if (ret != 0)
- goto err_iomap;
+ goto err_clk;
/* find the IRQ for this unit (note, this relies on the init call to
* ensure no current IRQs pending
@@ -1025,21 +1015,21 @@ 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_iomap;
+ goto err_clk;
}
- ret = request_irq(i2c->irq, s3c24xx_i2c_irq, 0,
- dev_name(&pdev->dev), i2c);
+ ret = devm_request_irq(&pdev->dev, i2c->irq, s3c24xx_i2c_irq, 0,
+ dev_name(&pdev->dev), i2c);
if (ret != 0) {
dev_err(&pdev->dev, "cannot claim IRQ %d\n", i2c->irq);
- goto err_iomap;
+ goto err_clk;
}
ret = s3c24xx_i2c_register_cpufreq(i2c);
if (ret < 0) {
dev_err(&pdev->dev, "failed to register cpufreq notifier\n");
- goto err_irq;
+ goto err_clk;
}
/* Note, previous versions of the driver used i2c_add_adapter()
@@ -1070,19 +1060,8 @@ static int s3c24xx_i2c_probe(struct platform_device *pdev)
err_cpufreq:
s3c24xx_i2c_deregister_cpufreq(i2c);
- err_irq:
- free_irq(i2c->irq, i2c);
-
- err_iomap:
- iounmap(i2c->regs);
-
- err_ioarea:
- release_resource(i2c->ioarea);
- kfree(i2c->ioarea);
-
err_clk:
clk_disable_unprepare(i2c->clk);
- clk_put(i2c->clk);
return ret;
}
@@ -1101,16 +1080,10 @@ static int s3c24xx_i2c_remove(struct platform_device *pdev)
s3c24xx_i2c_deregister_cpufreq(i2c);
i2c_del_adapter(&i2c->adap);
- free_irq(i2c->irq, i2c);
clk_disable_unprepare(i2c->clk);
- clk_put(i2c->clk);
-
- iounmap(i2c->regs);
- release_resource(i2c->ioarea);
s3c24xx_i2c_dt_gpio_free(i2c);
- kfree(i2c->ioarea);
return 0;
}
--
1.7.4.1
--
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