2008-09-14 00:58:51 +08:00
|
|
|
/*
|
|
|
|
* LCD / Backlight control code for Sharp SL-6000x (tosa)
|
|
|
|
*
|
|
|
|
* Copyright (c) 2005 Dirk Opfer
|
|
|
|
* Copyright (c) 2007,2008 Dmitry Baryshkov
|
|
|
|
*
|
|
|
|
* This program is free software; you can redistribute it and/or modify
|
|
|
|
* it under the terms of the GNU General Public License version 2 as
|
|
|
|
* published by the Free Software Foundation.
|
|
|
|
*
|
|
|
|
*/
|
|
|
|
|
|
|
|
#include <linux/kernel.h>
|
|
|
|
#include <linux/module.h>
|
|
|
|
#include <linux/device.h>
|
|
|
|
#include <linux/spi/spi.h>
|
|
|
|
#include <linux/i2c.h>
|
|
|
|
#include <linux/gpio.h>
|
|
|
|
#include <linux/fb.h>
|
|
|
|
#include <linux/backlight.h>
|
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>
2010-03-24 16:04:11 +08:00
|
|
|
#include <linux/slab.h>
|
2008-09-14 00:58:51 +08:00
|
|
|
|
|
|
|
#include <asm/mach/sharpsl_param.h>
|
|
|
|
|
|
|
|
#include <mach/tosa.h>
|
|
|
|
|
|
|
|
#define COMADJ_DEFAULT 97
|
|
|
|
|
|
|
|
#define DAC_CH1 0
|
|
|
|
#define DAC_CH2 1
|
|
|
|
|
|
|
|
struct tosa_bl_data {
|
|
|
|
struct i2c_client *i2c;
|
|
|
|
struct backlight_device *bl;
|
|
|
|
|
|
|
|
int comadj;
|
|
|
|
};
|
|
|
|
|
|
|
|
static void tosa_bl_set_backlight(struct tosa_bl_data *data, int brightness)
|
|
|
|
{
|
|
|
|
struct spi_device *spi = data->i2c->dev.platform_data;
|
|
|
|
|
|
|
|
i2c_smbus_write_byte_data(data->i2c, DAC_CH1, data->comadj);
|
|
|
|
|
|
|
|
/* SetBacklightDuty */
|
|
|
|
i2c_smbus_write_byte_data(data->i2c, DAC_CH2, (u8)(brightness & 0xff));
|
|
|
|
|
|
|
|
/* SetBacklightVR */
|
|
|
|
gpio_set_value(TOSA_GPIO_BL_C20MA, brightness & 0x100);
|
|
|
|
|
|
|
|
tosa_bl_enable(spi, brightness);
|
|
|
|
}
|
|
|
|
|
|
|
|
static int tosa_bl_update_status(struct backlight_device *dev)
|
|
|
|
{
|
|
|
|
struct backlight_properties *props = &dev->props;
|
|
|
|
struct tosa_bl_data *data = dev_get_drvdata(&dev->dev);
|
|
|
|
int power = max(props->power, props->fb_blank);
|
|
|
|
int brightness = props->brightness;
|
|
|
|
|
|
|
|
if (power)
|
|
|
|
brightness = 0;
|
|
|
|
|
|
|
|
tosa_bl_set_backlight(data, brightness);
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int tosa_bl_get_brightness(struct backlight_device *dev)
|
|
|
|
{
|
|
|
|
struct backlight_properties *props = &dev->props;
|
|
|
|
|
|
|
|
return props->brightness;
|
|
|
|
}
|
|
|
|
|
2009-12-14 07:58:57 +08:00
|
|
|
static const struct backlight_ops bl_ops = {
|
2008-09-14 00:58:51 +08:00
|
|
|
.get_brightness = tosa_bl_get_brightness,
|
|
|
|
.update_status = tosa_bl_update_status,
|
|
|
|
};
|
|
|
|
|
|
|
|
static int __devinit tosa_bl_probe(struct i2c_client *client,
|
|
|
|
const struct i2c_device_id *id)
|
|
|
|
{
|
2010-02-18 05:39:44 +08:00
|
|
|
struct backlight_properties props;
|
2012-05-30 06:07:25 +08:00
|
|
|
struct tosa_bl_data *data;
|
2008-09-14 00:58:51 +08:00
|
|
|
int ret = 0;
|
2012-05-30 06:07:25 +08:00
|
|
|
|
|
|
|
data = devm_kzalloc(&client->dev, sizeof(struct tosa_bl_data),
|
|
|
|
GFP_KERNEL);
|
2008-09-14 00:58:51 +08:00
|
|
|
if (!data)
|
|
|
|
return -ENOMEM;
|
|
|
|
|
|
|
|
data->comadj = sharpsl_param.comadj == -1 ? COMADJ_DEFAULT : sharpsl_param.comadj;
|
|
|
|
|
2012-07-31 05:40:40 +08:00
|
|
|
ret = devm_gpio_request(&client->dev, TOSA_GPIO_BL_C20MA, "backlight");
|
2008-09-14 00:58:51 +08:00
|
|
|
if (ret) {
|
|
|
|
dev_dbg(&data->bl->dev, "Unable to request gpio!\n");
|
2012-05-30 06:07:25 +08:00
|
|
|
return ret;
|
2008-09-14 00:58:51 +08:00
|
|
|
}
|
|
|
|
ret = gpio_direction_output(TOSA_GPIO_BL_C20MA, 0);
|
|
|
|
if (ret)
|
2012-07-31 05:40:40 +08:00
|
|
|
return ret;
|
2008-09-14 00:58:51 +08:00
|
|
|
|
|
|
|
i2c_set_clientdata(client, data);
|
|
|
|
data->i2c = client;
|
|
|
|
|
2010-02-18 05:39:44 +08:00
|
|
|
memset(&props, 0, sizeof(struct backlight_properties));
|
2011-03-23 07:30:21 +08:00
|
|
|
props.type = BACKLIGHT_RAW;
|
2010-02-18 05:39:44 +08:00
|
|
|
props.max_brightness = 512 - 1;
|
|
|
|
data->bl = backlight_device_register("tosa-bl", &client->dev, data,
|
|
|
|
&bl_ops, &props);
|
2008-09-14 00:58:51 +08:00
|
|
|
if (IS_ERR(data->bl)) {
|
|
|
|
ret = PTR_ERR(data->bl);
|
|
|
|
goto err_reg;
|
|
|
|
}
|
|
|
|
|
|
|
|
data->bl->props.brightness = 69;
|
|
|
|
data->bl->props.power = FB_BLANK_UNBLANK;
|
|
|
|
|
|
|
|
backlight_update_status(data->bl);
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
err_reg:
|
|
|
|
data->bl = NULL;
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int __devexit tosa_bl_remove(struct i2c_client *client)
|
|
|
|
{
|
|
|
|
struct tosa_bl_data *data = i2c_get_clientdata(client);
|
|
|
|
|
|
|
|
backlight_device_unregister(data->bl);
|
|
|
|
data->bl = NULL;
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
#ifdef CONFIG_PM
|
|
|
|
static int tosa_bl_suspend(struct i2c_client *client, pm_message_t pm)
|
|
|
|
{
|
|
|
|
struct tosa_bl_data *data = i2c_get_clientdata(client);
|
|
|
|
|
|
|
|
tosa_bl_set_backlight(data, 0);
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int tosa_bl_resume(struct i2c_client *client)
|
|
|
|
{
|
|
|
|
struct tosa_bl_data *data = i2c_get_clientdata(client);
|
|
|
|
|
|
|
|
backlight_update_status(data->bl);
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
#else
|
|
|
|
#define tosa_bl_suspend NULL
|
|
|
|
#define tosa_bl_resume NULL
|
|
|
|
#endif
|
|
|
|
|
|
|
|
static const struct i2c_device_id tosa_bl_id[] = {
|
|
|
|
{ "tosa-bl", 0 },
|
|
|
|
{ },
|
|
|
|
};
|
|
|
|
|
|
|
|
|
|
|
|
static struct i2c_driver tosa_bl_driver = {
|
|
|
|
.driver = {
|
|
|
|
.name = "tosa-bl",
|
|
|
|
.owner = THIS_MODULE,
|
|
|
|
},
|
|
|
|
.probe = tosa_bl_probe,
|
|
|
|
.remove = __devexit_p(tosa_bl_remove),
|
|
|
|
.suspend = tosa_bl_suspend,
|
|
|
|
.resume = tosa_bl_resume,
|
|
|
|
.id_table = tosa_bl_id,
|
|
|
|
};
|
|
|
|
|
2012-03-24 06:01:59 +08:00
|
|
|
module_i2c_driver(tosa_bl_driver);
|
2008-09-14 00:58:51 +08:00
|
|
|
|
|
|
|
MODULE_AUTHOR("Dmitry Baryshkov");
|
|
|
|
MODULE_LICENSE("GPL v2");
|
|
|
|
MODULE_DESCRIPTION("LCD/Backlight control for Sharp SL-6000 PDA");
|
|
|
|
|