linux/drivers/leds/leds-adp5520.c
Tejun Heo 5a0e3ad6af include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
percpu.h is included by sched.h and module.h and thus ends up being
included when building most .c files.  percpu.h includes slab.h which
in turn includes gfp.h making everything defined by the two files
universally available and complicating inclusion dependencies.

percpu.h -> slab.h dependency is about to be removed.  Prepare for
this change by updating users of gfp and slab facilities include those
headers directly instead of assuming availability.  As this conversion
needs to touch large number of source files, the following script is
used as the basis of conversion.

  http://userweb.kernel.org/~tj/misc/slabh-sweep.py

The script does the followings.

* Scan files for gfp and slab usages and update includes such that
  only the necessary includes are there.  ie. if only gfp is used,
  gfp.h, if slab is used, slab.h.

* When the script inserts a new include, it looks at the include
  blocks and try to put the new include such that its order conforms
  to its surrounding.  It's put in the include block which contains
  core kernel includes, in the same order that the rest are ordered -
  alphabetical, Christmas tree, rev-Xmas-tree or at the end if there
  doesn't seem to be any matching order.

* If the script can't find a place to put a new include (mostly
  because the file doesn't have fitting include block), it prints out
  an error message indicating which .h file needs to be added to the
  file.

The conversion was done in the following steps.

1. The initial automatic conversion of all .c files updated slightly
   over 4000 files, deleting around 700 includes and adding ~480 gfp.h
   and ~3000 slab.h inclusions.  The script emitted errors for ~400
   files.

2. Each error was manually checked.  Some didn't need the inclusion,
   some needed manual addition while adding it to implementation .h or
   embedding .c file was more appropriate for others.  This step added
   inclusions to around 150 files.

3. The script was run again and the output was compared to the edits
   from #2 to make sure no file was left behind.

4. Several build tests were done and a couple of problems were fixed.
   e.g. lib/decompress_*.c used malloc/free() wrappers around slab
   APIs requiring slab.h to be added manually.

5. The script was run on all .h files but without automatically
   editing them as sprinkling gfp.h and slab.h inclusions around .h
   files could easily lead to inclusion dependency hell.  Most gfp.h
   inclusion directives were ignored as stuff from gfp.h was usually
   wildly available and often used in preprocessor macros.  Each
   slab.h inclusion directive was examined and added manually as
   necessary.

6. percpu.h was updated not to include slab.h.

7. Build test were done on the following configurations and failures
   were fixed.  CONFIG_GCOV_KERNEL was turned off for all tests (as my
   distributed build env didn't work with gcov compiles) and a few
   more options had to be turned off depending on archs to make things
   build (like ipr on powerpc/64 which failed due to missing writeq).

   * x86 and x86_64 UP and SMP allmodconfig and a custom test config.
   * powerpc and powerpc64 SMP allmodconfig
   * sparc and sparc64 SMP allmodconfig
   * ia64 SMP allmodconfig
   * s390 SMP allmodconfig
   * alpha SMP allmodconfig
   * um on x86_64 SMP allmodconfig

8. percpu.h modifications were reverted so that it could be applied as
   a separate patch and serve as bisection point.

Given the fact that I had only a couple of failures from tests on step
6, I'm fairly confident about the coverage of this conversion patch.
If there is a breakage, it's likely to be something in one of the arch
headers which should be easily discoverable easily on most builds of
the specific arch.

Signed-off-by: Tejun Heo <tj@kernel.org>
Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
2010-03-30 22:02:32 +09:00

232 lines
5.6 KiB
C

/*
* LEDs driver for Analog Devices ADP5520/ADP5501 MFD PMICs
*
* Copyright 2009 Analog Devices Inc.
*
* Loosely derived from leds-da903x:
* Copyright (C) 2008 Compulab, Ltd.
* Mike Rapoport <mike@compulab.co.il>
*
* Copyright (C) 2006-2008 Marvell International Ltd.
* Eric Miao <eric.miao@marvell.com>
*
* Licensed under the GPL-2 or later.
*/
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/platform_device.h>
#include <linux/leds.h>
#include <linux/workqueue.h>
#include <linux/mfd/adp5520.h>
#include <linux/slab.h>
struct adp5520_led {
struct led_classdev cdev;
struct work_struct work;
struct device *master;
enum led_brightness new_brightness;
int id;
int flags;
};
static void adp5520_led_work(struct work_struct *work)
{
struct adp5520_led *led = container_of(work, struct adp5520_led, work);
adp5520_write(led->master, ADP5520_LED1_CURRENT + led->id - 1,
led->new_brightness >> 2);
}
static void adp5520_led_set(struct led_classdev *led_cdev,
enum led_brightness value)
{
struct adp5520_led *led;
led = container_of(led_cdev, struct adp5520_led, cdev);
led->new_brightness = value;
schedule_work(&led->work);
}
static int adp5520_led_setup(struct adp5520_led *led)
{
struct device *dev = led->master;
int flags = led->flags;
int ret = 0;
switch (led->id) {
case FLAG_ID_ADP5520_LED1_ADP5501_LED0:
ret |= adp5520_set_bits(dev, ADP5520_LED_TIME,
(flags >> ADP5520_FLAG_OFFT_SHIFT) &
ADP5520_FLAG_OFFT_MASK);
ret |= adp5520_set_bits(dev, ADP5520_LED_CONTROL,
ADP5520_LED1_EN);
break;
case FLAG_ID_ADP5520_LED2_ADP5501_LED1:
ret |= adp5520_set_bits(dev, ADP5520_LED_TIME,
((flags >> ADP5520_FLAG_OFFT_SHIFT) &
ADP5520_FLAG_OFFT_MASK) << 2);
ret |= adp5520_clr_bits(dev, ADP5520_LED_CONTROL,
ADP5520_R3_MODE);
ret |= adp5520_set_bits(dev, ADP5520_LED_CONTROL,
ADP5520_LED2_EN);
break;
case FLAG_ID_ADP5520_LED3_ADP5501_LED2:
ret |= adp5520_set_bits(dev, ADP5520_LED_TIME,
((flags >> ADP5520_FLAG_OFFT_SHIFT) &
ADP5520_FLAG_OFFT_MASK) << 4);
ret |= adp5520_clr_bits(dev, ADP5520_LED_CONTROL,
ADP5520_C3_MODE);
ret |= adp5520_set_bits(dev, ADP5520_LED_CONTROL,
ADP5520_LED3_EN);
break;
}
return ret;
}
static int __devinit adp5520_led_prepare(struct platform_device *pdev)
{
struct adp5520_leds_platform_data *pdata = pdev->dev.platform_data;
struct device *dev = pdev->dev.parent;
int ret = 0;
ret |= adp5520_write(dev, ADP5520_LED1_CURRENT, 0);
ret |= adp5520_write(dev, ADP5520_LED2_CURRENT, 0);
ret |= adp5520_write(dev, ADP5520_LED3_CURRENT, 0);
ret |= adp5520_write(dev, ADP5520_LED_TIME, pdata->led_on_time << 6);
ret |= adp5520_write(dev, ADP5520_LED_FADE, FADE_VAL(pdata->fade_in,
pdata->fade_out));
return ret;
}
static int __devinit adp5520_led_probe(struct platform_device *pdev)
{
struct adp5520_leds_platform_data *pdata = pdev->dev.platform_data;
struct adp5520_led *led, *led_dat;
struct led_info *cur_led;
int ret, i;
if (pdata == NULL) {
dev_err(&pdev->dev, "missing platform data\n");
return -ENODEV;
}
if (pdata->num_leds > ADP5520_01_MAXLEDS) {
dev_err(&pdev->dev, "can't handle more than %d LEDS\n",
ADP5520_01_MAXLEDS);
return -EFAULT;
}
led = kzalloc(sizeof(*led) * pdata->num_leds, GFP_KERNEL);
if (led == NULL) {
dev_err(&pdev->dev, "failed to alloc memory\n");
return -ENOMEM;
}
ret = adp5520_led_prepare(pdev);
if (ret) {
dev_err(&pdev->dev, "failed to write\n");
goto err_free;
}
for (i = 0; i < pdata->num_leds; ++i) {
cur_led = &pdata->leds[i];
led_dat = &led[i];
led_dat->cdev.name = cur_led->name;
led_dat->cdev.default_trigger = cur_led->default_trigger;
led_dat->cdev.brightness_set = adp5520_led_set;
led_dat->cdev.brightness = LED_OFF;
if (cur_led->flags & ADP5520_FLAG_LED_MASK)
led_dat->flags = cur_led->flags;
else
led_dat->flags = i + 1;
led_dat->id = led_dat->flags & ADP5520_FLAG_LED_MASK;
led_dat->master = pdev->dev.parent;
led_dat->new_brightness = LED_OFF;
INIT_WORK(&led_dat->work, adp5520_led_work);
ret = led_classdev_register(led_dat->master, &led_dat->cdev);
if (ret) {
dev_err(&pdev->dev, "failed to register LED %d\n",
led_dat->id);
goto err;
}
ret = adp5520_led_setup(led_dat);
if (ret) {
dev_err(&pdev->dev, "failed to write\n");
i++;
goto err;
}
}
platform_set_drvdata(pdev, led);
return 0;
err:
if (i > 0) {
for (i = i - 1; i >= 0; i--) {
led_classdev_unregister(&led[i].cdev);
cancel_work_sync(&led[i].work);
}
}
err_free:
kfree(led);
return ret;
}
static int __devexit adp5520_led_remove(struct platform_device *pdev)
{
struct adp5520_leds_platform_data *pdata = pdev->dev.platform_data;
struct adp5520_led *led;
int i;
led = platform_get_drvdata(pdev);
adp5520_clr_bits(led->master, ADP5520_LED_CONTROL,
ADP5520_LED1_EN | ADP5520_LED2_EN | ADP5520_LED3_EN);
for (i = 0; i < pdata->num_leds; i++) {
led_classdev_unregister(&led[i].cdev);
cancel_work_sync(&led[i].work);
}
kfree(led);
return 0;
}
static struct platform_driver adp5520_led_driver = {
.driver = {
.name = "adp5520-led",
.owner = THIS_MODULE,
},
.probe = adp5520_led_probe,
.remove = __devexit_p(adp5520_led_remove),
};
static int __init adp5520_led_init(void)
{
return platform_driver_register(&adp5520_led_driver);
}
module_init(adp5520_led_init);
static void __exit adp5520_led_exit(void)
{
platform_driver_unregister(&adp5520_led_driver);
}
module_exit(adp5520_led_exit);
MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>");
MODULE_DESCRIPTION("LEDS ADP5520(01) Driver");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:adp5520-led");