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pwm: Convert pwm-pxa to use devm_* APIs

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Signed-off-by: Axel Lin <axel.lin@gmail.com>
Signed-off-by: Thierry Reding <thierry.reding@avionic-design.de>
This commit is contained in:
Axel Lin 2012-07-01 18:02:14 +08:00 committed by Thierry Reding
parent 261995dd30
commit 45b301d2b1
1 changed files with 10 additions and 39 deletions
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49
drivers/pwm/pwm-pxa.c
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@ -1,5 +1,5 @@
/* /*
* linux/arch/arm/mach-pxa/pwm.c * drivers/pwm/pwm-pxa.c
* *
* simple driver for PWM (Pulse Width Modulator) controller * simple driver for PWM (Pulse Width Modulator) controller
* *
@ -145,17 +145,16 @@ static int __devinit pwm_probe(struct platform_device *pdev)
struct resource *r; struct resource *r;
int ret = 0; int ret = 0;
pwm = kzalloc(sizeof(*pwm), GFP_KERNEL); pwm = devm_kzalloc(&pdev->dev, sizeof(*pwm), GFP_KERNEL);
if (pwm == NULL) { if (pwm == NULL) {
dev_err(&pdev->dev, "failed to allocate memory\n"); dev_err(&pdev->dev, "failed to allocate memory\n");
return -ENOMEM; return -ENOMEM;
} }
pwm->clk = clk_get(&pdev->dev, NULL); pwm->clk = devm_clk_get(&pdev->dev, NULL);
if (IS_ERR(pwm->clk)) { if (IS_ERR(pwm->clk))
ret = PTR_ERR(pwm->clk); return PTR_ERR(pwm->clk);
goto err_free;
}
pwm->clk_enabled = 0; pwm->clk_enabled = 0;
pwm->chip.dev = &pdev->dev; pwm->chip.dev = &pdev->dev;
@ -166,23 +165,12 @@ static int __devinit pwm_probe(struct platform_device *pdev)
r = platform_get_resource(pdev, IORESOURCE_MEM, 0); r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (r == NULL) { if (r == NULL) {
dev_err(&pdev->dev, "no memory resource defined\n"); dev_err(&pdev->dev, "no memory resource defined\n");
ret = -ENODEV; return -ENODEV;
goto err_free_clk;
} }
r = request_mem_region(r->start, resource_size(r), pdev->name); pwm->mmio_base = devm_request_and_ioremap(&pdev->dev, r);
if (r == NULL) { if (pwm->mmio_base == NULL)
dev_err(&pdev->dev, "failed to request memory resource\n"); return -EADDRNOTAVAIL;
ret = -EBUSY;
goto err_free_clk;
}
pwm->mmio_base = ioremap(r->start, resource_size(r));
if (pwm->mmio_base == NULL) {
dev_err(&pdev->dev, "failed to ioremap() registers\n");
ret = -ENODEV;
goto err_free_mem;
}
ret = pwmchip_add(&pwm->chip); ret = pwmchip_add(&pwm->chip);
if (ret < 0) { if (ret < 0) {
@ -192,34 +180,17 @@ static int __devinit pwm_probe(struct platform_device *pdev)
platform_set_drvdata(pdev, pwm); platform_set_drvdata(pdev, pwm);
return 0; return 0;
err_free_mem:
release_mem_region(r->start, resource_size(r));
err_free_clk:
clk_put(pwm->clk);
err_free:
kfree(pwm);
return ret;
} }
static int __devexit pwm_remove(struct platform_device *pdev) static int __devexit pwm_remove(struct platform_device *pdev)
{ {
struct pxa_pwm_chip *chip; struct pxa_pwm_chip *chip;
struct resource *r;
chip = platform_get_drvdata(pdev); chip = platform_get_drvdata(pdev);
if (chip == NULL) if (chip == NULL)
return -ENODEV; return -ENODEV;
pwmchip_remove(&chip->chip); pwmchip_remove(&chip->chip);
iounmap(chip->mmio_base);
r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
release_mem_region(r->start, resource_size(r));
clk_put(chip->clk);
kfree(chip);
return 0; return 0;
} }