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authorKedareswara rao Appana <appana.durga.rao@xilinx.com>2013-12-19 16:05:06 +0100
committerWolfram Sang <wsa@the-dreams.de>2014-01-04 23:35:02 +0100
commit168e722dcb9acb77a703080d59d47d9ac3958278 (patch)
treeb3518091a97745414bbd0d5439c45f91654e851b /drivers
parent617bdcbc3cb2c828771c2632bd8d57f7df5eea5c (diff)
downloadop-kernel-dev-168e722dcb9acb77a703080d59d47d9ac3958278.zip
op-kernel-dev-168e722dcb9acb77a703080d59d47d9ac3958278.tar.gz
i2c: xilinx: Use devm_* functions
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>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/i2c/busses/i2c-xiic.c65
1 files changed, 15 insertions, 50 deletions
diff --git a/drivers/i2c/busses/i2c-xiic.c b/drivers/i2c/busses/i2c-xiic.c
index 2d55989..6f9918f 100644
--- a/drivers/i2c/busses/i2c-xiic.c
+++ b/drivers/i2c/busses/i2c-xiic.c
@@ -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>
@@ -697,33 +698,21 @@ static int xiic_i2c_probe(struct platform_device *pdev)
int ret, irq;
u8 i;
+ i2c = devm_kzalloc(&pdev->dev, sizeof(*i2c), GFP_KERNEL);
+ if (!i2c)
+ return -ENOMEM;
+
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- if (!res)
- goto resource_missing;
+ i2c->base = devm_ioremap_resource(&pdev->dev, res);
+ if (IS_ERR(i2c->base))
+ return PTR_ERR(i2c->base);
irq = platform_get_irq(pdev, 0);
if (irq < 0)
- goto resource_missing;
+ return irq;
pdata = dev_get_platdata(&pdev->dev);
- i2c = kzalloc(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;
- }
-
- 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;
- }
-
/* hook up driver to tree */
platform_set_drvdata(pdev, i2c);
i2c->adap = xiic_adapter;
@@ -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;
}
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