linux-kernel - [PATCH V4 2/3] pwm: pxa: use module_platform

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Message-ID: <1367803801-17111-3-git-send-email-chao.xie@marvell.com>
Date:	Sun, 5 May 2013 21:30:00 -0400
From:	Chao Xie <chao.xie@...vell.com>
To:	<thierry.reding@...onic-design.de>, <linux-kernel@...r.kernel.org>,
	<xiechao.mail@...il.com>, <eric.y.miao@...il.com>
CC:	Chao Xie <chao.xie@...vell.com>
Subject: [PATCH V4 2/3] pwm: pxa: use module_platform_driver()

Old pwm-pxa.c will register driver by arch_initcall. Then other
drivers based on the PWM driver can successully call old
pwm_request because arch_initcall make sure the PWM driver will
be registered earlier.
Now, pwm_request is re-written and done by common layer code. It
will return -EPROBE_DEFER if the PWM device is not probed.
The driver based on PWM driver can make use of -EPROBE_DEFER
to delay its probing.
So arch_initcall can be replaced by module_platform_driver.

Signed-off-by: Chao Xie <chao.xie@...vell.com>
---
 drivers/pwm/pwm-pxa.c |   12 +-----------
 1 files changed, 1 insertions(+), 11 deletions(-)

diff --git a/drivers/pwm/pwm-pxa.c b/drivers/pwm/pwm-pxa.c
index dee6ab55..aa4bea7 100644
--- a/drivers/pwm/pwm-pxa.c
+++ b/drivers/pwm/pwm-pxa.c
@@ -187,16 +187,6 @@ static struct platform_driver pwm_driver = {
 	.id_table	= pwm_id_table,
 };
 
-static int __init pwm_init(void)
-{
-	return platform_driver_register(&pwm_driver);
-}
-arch_initcall(pwm_init);
-
-static void __exit pwm_exit(void)
-{
-	platform_driver_unregister(&pwm_driver);
-}
-module_exit(pwm_exit);
+module_platform_driver(pwm_driver);
 
 MODULE_LICENSE("GPL v2");
-- 
1.7.4.1

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