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i2c: xilinx: Use devm_* functions

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Simplified the probe and remove functions using devm_* functions

Signed-off-by: Kedareswara rao Appana <appanad@xilinx.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
This commit is contained in:
Kedareswara rao Appana 2013-12-19 16:05:06 +01:00 committed by Wolfram Sang
parent 617bdcbc3c
commit 168e722dcb
1 changed files with 17 additions and 52 deletions
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69
drivers/i2c/busses/i2c-xiic.c
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@ -32,6 +32,7 @@
#include <linux/module.h>
#include <linux/init.h>
#include <linux/errno.h>
#include <linux/err.h>
#include <linux/delay.h>
#include <linux/platform_device.h>
#include <linux/i2c.h>
@ -697,32 +698,20 @@ static int xiic_i2c_probe(struct platform_device *pdev)
int ret, irq;
u8 i;
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!res)
goto resource_missing;
irq = platform_get_irq(pdev, 0);
if (irq < 0)
goto resource_missing;
pdata = dev_get_platdata(&pdev->dev);
i2c = kzalloc(sizeof(*i2c), GFP_KERNEL);
i2c = devm_kzalloc(&pdev->dev, sizeof(*i2c), GFP_KERNEL);
if (!i2c)
return -ENOMEM;
if (!request_mem_region(res->start, resource_size(res), pdev->name)) {
dev_err(&pdev->dev, "Memory region busy\n");
ret = -EBUSY;
goto request_mem_failed;
}
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
i2c->base = devm_ioremap_resource(&pdev->dev, res);
if (IS_ERR(i2c->base))
return PTR_ERR(i2c->base);
i2c->base = ioremap(res->start, resource_size(res));
if (!i2c->base) {
dev_err(&pdev->dev, "Unable to map registers\n");
ret = -EIO;
goto map_failed;
}
irq = platform_get_irq(pdev, 0);
if (irq < 0)
return irq;
pdata = dev_get_platdata(&pdev->dev);
/* hook up driver to tree */
platform_set_drvdata(pdev, i2c);
@ -733,10 +722,11 @@ static int xiic_i2c_probe(struct platform_device *pdev)
spin_lock_init(&i2c->lock);
init_waitqueue_head(&i2c->wait);
ret = request_irq(irq, xiic_isr, 0, pdev->name, i2c);
if (ret) {
ret = devm_request_irq(&pdev->dev, irq, xiic_isr, 0, pdev->name, i2c);
if (ret < 0) {
dev_err(&pdev->dev, "Cannot claim IRQ\n");
goto request_irq_failed;
return ret;
}
xiic_reinit(i2c);
@ -745,7 +735,8 @@ static int xiic_i2c_probe(struct platform_device *pdev)
ret = i2c_add_adapter(&i2c->adap);
if (ret) {
dev_err(&pdev->dev, "Failed to add adapter\n");
goto add_adapter_failed;
xiic_deinit(i2c);
return ret;
}
if (pdata) {
@ -755,43 +746,17 @@ static int xiic_i2c_probe(struct platform_device *pdev)
}
return 0;
add_adapter_failed:
free_irq(irq, i2c);
request_irq_failed:
xiic_deinit(i2c);
iounmap(i2c->base);
map_failed:
release_mem_region(res->start, resource_size(res));
request_mem_failed:
kfree(i2c);
return ret;
resource_missing:
dev_err(&pdev->dev, "IRQ or Memory resource is missing\n");
return -ENOENT;
}
static int xiic_i2c_remove(struct platform_device *pdev)
{
struct xiic_i2c *i2c = platform_get_drvdata(pdev);
struct resource *res;
/* remove adapter & data */
i2c_del_adapter(&i2c->adap);
xiic_deinit(i2c);
free_irq(platform_get_irq(pdev, 0), i2c);
iounmap(i2c->base);
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (res)
release_mem_region(res->start, resource_size(res));
kfree(i2c);
return 0;
}