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Date: Fri, 24 May 2013 16:21:01 -0700
From: H Hartley Sweeten <hartleys@...ionengravers.com>
To: Linux Kernel <linux-kernel@...r.kernel.org>
CC: <arnd@...db.de>, <gregkh@...uxfoundation.org>,
Ryan Mallon <rmallon@...il.com>, <mcrapet@...il.com>,
<hsweeten@...ionengravers.com>
Subject: [PATCH 01/14] misc/ep93xx_pwm: use managed device resources
Use managed device resources to clean up the probe/remove.
Signed-off-by: H Hartley Sweeten <hsweeten@...ionengravers.com>
Cc: Arnd Bergmann <arnd@...db.de>
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc: Ryan Mallon <rmallon@...il.com>
Cc: Matthieu Crapet <mcrapet@...il.com>
---
drivers/misc/ep93xx_pwm.c | 73 +++++++++++++----------------------------------
1 file changed, 20 insertions(+), 53 deletions(-)
diff --git a/drivers/misc/ep93xx_pwm.c b/drivers/misc/ep93xx_pwm.c
index 9ba93f0..36370b4 100644
--- a/drivers/misc/ep93xx_pwm.c
+++ b/drivers/misc/ep93xx_pwm.c
@@ -273,50 +273,33 @@ static int __init ep93xx_pwm_probe(struct platform_device *pdev)
{
struct ep93xx_pwm *pwm;
struct resource *res;
- int err;
+ int ret;
- err = ep93xx_pwm_acquire_gpio(pdev);
- if (err)
- return err;
+ pwm = devm_kzalloc(&pdev->dev, sizeof(*pwm), GFP_KERNEL);
+ if (!pwm)
+ return -ENOMEM;
- pwm = kzalloc(sizeof(struct ep93xx_pwm), GFP_KERNEL);
- if (!pwm) {
- err = -ENOMEM;
- goto fail_no_mem;
- }
+ pwm->clk = devm_clk_get(&pdev->dev, "pwm_clk");
+ if (IS_ERR(pwm->clk))
+ return PTR_ERR(pwm->clk);
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- if (res == NULL) {
- err = -ENXIO;
- goto fail_no_mem_resource;
- }
-
- res = request_mem_region(res->start, resource_size(res), pdev->name);
- if (res == NULL) {
- err = -EBUSY;
- goto fail_no_mem_resource;
- }
-
- pwm->mmio_base = ioremap(res->start, resource_size(res));
- if (pwm->mmio_base == NULL) {
- err = -ENXIO;
- goto fail_no_ioremap;
- }
-
- err = sysfs_create_group(&pdev->dev.kobj, &ep93xx_pwm_sysfs_files);
- if (err)
- goto fail_no_sysfs;
-
- pwm->clk = clk_get(&pdev->dev, "pwm_clk");
- if (IS_ERR(pwm->clk)) {
- err = PTR_ERR(pwm->clk);
- goto fail_no_clk;
+ pwm->mmio_base = devm_ioremap_resource(&pdev->dev, res);
+ if (IS_ERR(pwm->mmio_base))
+ return PTR_ERR(pwm->mmio_base);
+
+ ret = ep93xx_pwm_acquire_gpio(pdev);
+ if (ret)
+ return ret;
+
+ ret = sysfs_create_group(&pdev->dev.kobj, &ep93xx_pwm_sysfs_files);
+ if (ret) {
+ ep93xx_pwm_release_gpio(pdev);
+ return ret;
}
pwm->duty_percent = 50;
- platform_set_drvdata(pdev, pwm);
-
/* disable pwm at startup. Avoids zero value. */
ep93xx_pwm_disable(pwm);
ep93xx_pwm_write_tc(pwm, EP93XX_PWM_MAX_COUNT);
@@ -324,33 +307,17 @@ static int __init ep93xx_pwm_probe(struct platform_device *pdev)
clk_enable(pwm->clk);
+ platform_set_drvdata(pdev, pwm);
return 0;
-
-fail_no_clk:
- sysfs_remove_group(&pdev->dev.kobj, &ep93xx_pwm_sysfs_files);
-fail_no_sysfs:
- iounmap(pwm->mmio_base);
-fail_no_ioremap:
- release_mem_region(res->start, resource_size(res));
-fail_no_mem_resource:
- kfree(pwm);
-fail_no_mem:
- ep93xx_pwm_release_gpio(pdev);
- return err;
}
static int __exit ep93xx_pwm_remove(struct platform_device *pdev)
{
struct ep93xx_pwm *pwm = platform_get_drvdata(pdev);
- struct resource *res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
ep93xx_pwm_disable(pwm);
clk_disable(pwm->clk);
- clk_put(pwm->clk);
sysfs_remove_group(&pdev->dev.kobj, &ep93xx_pwm_sysfs_files);
- iounmap(pwm->mmio_base);
- release_mem_region(res->start, resource_size(res));
- kfree(pwm);
ep93xx_pwm_release_gpio(pdev);
return 0;
--
1.8.1.4
--
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