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sony_acpi: Add backlight support to the sony_acpi

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Make the sony_acpi use the backlight subsystem to adjust brightness value
instead of using the /proc/sony/brightness file.  (Other settings will
still have a /proc/sony/...  entry)

Signed-off-by: Alessandro Guido <alessandro.guido@gmail.com>
Cc: Stelian Pop <stelian@popies.net>
Cc: Richard Purdie <rpurdie@rpsys.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Mattia Dongili <malattia@linux.it>
Signed-off-by: Len Brown <len.brown@intel.com>
This commit is contained in:
Alessandro Guido 2007-01-13 23:04:34 +01:00 committed by Len Brown
parent fac3506100
commit 50f62afb11
2 changed files with 48 additions and 12 deletions
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1
drivers/acpi/Kconfig
View File

@ -255,6 +255,7 @@ config ACPI_TOSHIBA
config ACPI_SONY
tristate "Sony Laptop Extras"
depends on X86 && ACPI
select BACKLIGHT_CLASS_DEVICE
default m
---help---
This mini-driver drives the ACPI SNC device present in the

59
drivers/acpi/sony_acpi.c
View File

@ -27,13 +27,19 @@
#include <linux/moduleparam.h>
#include <linux/init.h>
#include <linux/types.h>
#include <linux/backlight.h>
#include <linux/err.h>
#include <acpi/acpi_drivers.h>
#include <acpi/acpi_bus.h>
#include <asm/uaccess.h>
#define ACPI_SNC_CLASS "sony"
#define ACPI_SNC_HID "SNY5001"
#define ACPI_SNC_DRIVER_NAME "ACPI Sony Notebook Control Driver v0.2"
#define ACPI_SNC_DRIVER_NAME "ACPI Sony Notebook Control Driver v0.3"
/* the device uses 1-based values, while the backlight subsystem uses
0-based values */
#define SONY_MAX_BRIGHTNESS 8
#define LOG_PFX KERN_WARNING "sony_acpi: "
@ -49,6 +55,16 @@ MODULE_PARM_DESC(debug, "set this to 1 (and RTFM) if you want to help "
static acpi_handle sony_acpi_handle;
static struct proc_dir_entry *sony_acpi_dir;
static int sony_backlight_update_status(struct backlight_device *bd);
static int sony_backlight_get_brightness(struct backlight_device *bd);
static struct backlight_device *sony_backlight_device;
static struct backlight_properties sony_backlight_properties = {
.owner = THIS_MODULE,
.update_status = sony_backlight_update_status,
.get_brightness = sony_backlight_get_brightness,
.max_brightness = SONY_MAX_BRIGHTNESS - 1,
};
static struct sony_acpi_value {
char *name; /* name of the entry */
struct proc_dir_entry *proc; /* /proc entry */
@ -60,20 +76,12 @@ static struct sony_acpi_value {
int valid; /* Has ever been set */
int debug; /* active only in debug mode ? */
} sony_acpi_values[] = {
{
.name = "brightness",
.acpiget = "GBRT",
.acpiset = "SBRT",
.min = 1,
.max = 8,
.debug = 0,
},
{
.name = "brightness_default",
.acpiget = "GPBR",
.acpiset = "SPBR",
.min = 1,
.max = 8,
.max = SONY_MAX_BRIGHTNESS,
.debug = 0,
},
{
@ -276,6 +284,7 @@ static int sony_acpi_add(struct acpi_device *device)
{
acpi_status status;
int result;
acpi_handle handle;
struct sony_acpi_value *item;
sony_acpi_handle = device->handle;
@ -303,9 +312,15 @@ static int sony_acpi_add(struct acpi_device *device)
}
}
for (item = sony_acpi_values; item->name; ++item) {
acpi_handle handle;
if (ACPI_SUCCESS(acpi_get_handle(sony_acpi_handle, "GBRT", &handle))) {
sony_backlight_device = backlight_device_register("sony", NULL,
&sony_backlight_properties);
if (IS_ERR(sony_backlight_device)) {
printk(LOG_PFX "unable to register backlight device\n");
}
}
for (item = sony_acpi_values; item->name; ++item) {
if (!debug && item->debug)
continue;
@ -358,6 +373,9 @@ static int sony_acpi_remove(struct acpi_device *device, int type)
acpi_status status;
struct sony_acpi_value *item;
if (sony_backlight_device)
backlight_device_unregister(sony_backlight_device);
if (debug) {
status = acpi_remove_notify_handler(sony_acpi_handle,
ACPI_DEVICE_NOTIFY,
@ -375,6 +393,23 @@ static int sony_acpi_remove(struct acpi_device *device, int type)
return 0;
}
static int sony_backlight_update_status(struct backlight_device *bd)
{
return acpi_callsetfunc(sony_acpi_handle, "SBRT",
bd->props->brightness + 1,
NULL);
}
static int sony_backlight_get_brightness(struct backlight_device *bd)
{
int value;
if (acpi_callgetfunc(sony_acpi_handle, "GBRT", &value))
return 0;
/* brightness levels are 1-based, while backlight ones are 0-based */
return value - 1;
}
static struct acpi_driver sony_acpi_driver = {
.name = ACPI_SNC_DRIVER_NAME,
.class = ACPI_SNC_CLASS,