lkml.org 
[lkml]   [2006]   [Apr]   [19]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    Patch in this message
    /
    Date
    From
    SubjectPATCH [3/3]: Provide generic backlight support in Toshiba ACPI driver
    Signed-off-by: Matthew Garrett <mjg59@srcf.ucam.org>

    diff -ur drivers/acpi.bak/Kconfig drivers/acpi/Kconfig
    --- drivers/acpi.bak/Kconfig 2006-04-18 08:51:49 +0100
    +++ a/drivers/acpi/Kconfig 2006-04-19 19:37:08 +0100
    @@ -220,6 +220,7 @@
    config ACPI_TOSHIBA
    tristate "Toshiba Laptop Extras"
    depends on X86
    + select BACKLIGHT_DEVICE
    ---help---
    This driver adds support for access to certain system settings
    on "legacy free" Toshiba laptops. These laptops can be recognized by
    diff -ur drivers/acpi.bak/toshiba_acpi.c drivers/acpi/toshiba_acpi.c
    --- drivers/acpi.bak/toshiba_acpi.c 2006-04-03 04:22:10 +0100
    +++ a/drivers/acpi/toshiba_acpi.c 2006-04-19 19:37:48 +0100
    @@ -41,6 +41,7 @@
    #include <linux/init.h>
    #include <linux/types.h>
    #include <linux/proc_fs.h>
    +#include <linux/backlight.h>
    #include <asm/uaccess.h>

    #include <acpi/acpi_drivers.h>
    @@ -97,6 +98,8 @@
    #define HCI_VIDEO_OUT_CRT 0x2
    #define HCI_VIDEO_OUT_TV 0x4

    +static struct backlight_device *tosh_backlight_device;
    +
    /* utility
    */

    @@ -289,6 +292,19 @@
    return p;
    }

    +static int tosh_get_brightness(struct backlight_device *bd)
    +{
    + int brightness;
    + u32 hci_result;
    +
    + hci_read1(HCI_LCD_BRIGHTNESS, &brightness, &hci_result);
    + if (hci_result == HCI_SUCCESS) {
    + brightness = brightness >> HCI_LCD_BRIGHTNESS_SHIFT;
    + return brightness;
    + } else
    + return 0;
    +}
    +
    static unsigned long write_lcd(const char *buffer, unsigned long count)
    {
    int value;
    @@ -307,6 +323,28 @@
    return count;
    }

    +static int tosh_set_brightness(int brightness)
    +{
    + u32 hci_result;
    +
    + if (brightness >= 0 && brightness < HCI_LCD_BRIGHTNESS_LEVELS) {
    + brightness= brightness << HCI_LCD_BRIGHTNESS_SHIFT;
    + hci_write1(HCI_LCD_BRIGHTNESS, brightness, &hci_result);
    + if (hci_result != HCI_SUCCESS)
    + return -EFAULT;
    + } else {
    + return -EINVAL;
    + }
    +
    + return 0;
    +}
    +
    +static int tosh_update_brightness(struct backlight_device *bd)
    +{
    + int value = bd->props->brightness;
    + return tosh_set_brightness(value);
    +}
    +
    static char *read_video(char *p)
    {
    u32 hci_result;
    @@ -477,6 +515,13 @@
    {NULL}
    };

    +static struct backlight_properties toshbl_data = {
    + .owner = THIS_MODULE,
    + .get_brightness = tosh_get_brightness,
    + .update_status = tosh_update_brightness,
    + .max_brightness = HCI_LCD_BRIGHTNESS_LEVELS,
    +};
    +
    static acpi_status __init add_device(void)
    {
    struct proc_dir_entry *proc;
    @@ -546,6 +591,14 @@
    remove_proc_entry(PROC_TOSHIBA, acpi_root_dir);
    }

    + tosh_backlight_device = backlight_device_register ("tosh-bl", NULL,
    + &toshbl_data);
    +
    + if (IS_ERR (tosh_backlight_device)) {
    + printk("Failed to register Toshiba backlight device\n");
    + tosh_backlight_device = NULL;
    + }
    +
    return (ACPI_SUCCESS(status)) ? 0 : -ENODEV;
    }

    @@ -556,6 +609,9 @@
    if (toshiba_proc_dir)
    remove_proc_entry(PROC_TOSHIBA, acpi_root_dir);

    + if (tosh_backlight_device)
    + backlight_device_unregister(tosh_backlight_device);
    +
    return;
    }

    --
    Matthew Garrett | mjg59@srcf.ucam.org
    -
    To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
    the body of a message to majordomo@vger.kernel.org
    More majordomo info at http://vger.kernel.org/majordomo-info.html
    Please read the FAQ at http://www.tux.org/lkml/
    \
     
     \ /
      Last update: 2006-04-19 20:53    [W:0.032 / U:60.384 seconds]
    ©2003-2016 Jasper Spaans. hosted at Digital OceanAdvertise on this site