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author | Kedareswara rao Appana <appana.durga.rao@xilinx.com> | 2013-12-19 15:05:06 (GMT) |
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committer | Wolfram Sang <wsa@the-dreams.de> | 2014-01-04 22:35:02 (GMT) |
commit | 168e722dcb9acb77a703080d59d47d9ac3958278 (patch) | |
tree | b3518091a97745414bbd0d5439c45f91654e851b | |
parent | 617bdcbc3cb2c828771c2632bd8d57f7df5eea5c (diff) | |
download | linux-168e722dcb9acb77a703080d59d47d9ac3958278.tar.xz |
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>
-rw-r--r-- | drivers/i2c/busses/i2c-xiic.c | 65 |
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; } |