[PATCH 3/8] platform/x86: fujitsu-laptop: use a sparse keymap for brightness key event generation

[Michał Kępień]

Simplify brightness key event generation by using a sparse keymap.

Signed-off-by: Michał Kępień <ker...@kempniu.pl>
---
 drivers/platform/x86/Kconfig          |  1 +
 drivers/platform/x86/fujitsu-laptop.c | 31 +++++++++++++++----------------
 2 files changed, 16 insertions(+), 16 deletions(-)

diff --git a/drivers/platform/x86/Kconfig b/drivers/platform/x86/Kconfig
index 4bc88eb52712..f614521a6876 100644
--- a/drivers/platform/x86/Kconfig
+++ b/drivers/platform/x86/Kconfig
@@ -175,6 +175,7 @@ config FUJITSU_LAPTOP
        depends on BACKLIGHT_CLASS_DEVICE
        depends on ACPI_VIDEO || ACPI_VIDEO = n
        depends on LEDS_CLASS || LEDS_CLASS=n
+       select INPUT_SPARSEKMAP
        ---help---
          This is a driver for laptops built by Fujitsu:
 
diff --git a/drivers/platform/x86/fujitsu-laptop.c 
b/drivers/platform/x86/fujitsu-laptop.c
index 68e338c6a876..3483ac37bee5 100644
--- a/drivers/platform/x86/fujitsu-laptop.c
+++ b/drivers/platform/x86/fujitsu-laptop.c
@@ -57,6 +57,7 @@
 #include <linux/backlight.h>
 #include <linux/fb.h>
 #include <linux/input.h>
+#include <linux/input/sparse-keymap.h>
 #include <linux/kfifo.h>
 #include <linux/platform_device.h>
 #include <linux/slab.h>
@@ -590,9 +591,16 @@ static const struct dmi_system_id fujitsu_dmi_table[] 
__initconst = {
 
 /* ACPI device for LCD brightness control */
 
+static const struct key_entry keymap_backlight[] = {
+       { KE_KEY, true, { KEY_BRIGHTNESSUP } },
+       { KE_KEY, false, { KEY_BRIGHTNESSDOWN } },
+       { KE_END, 0 }
+};
+
 static int acpi_fujitsu_bl_input_setup(struct acpi_device *device)
 {
        struct fujitsu_bl *fujitsu_bl = acpi_driver_data(device);
+       int ret;
 
        fujitsu_bl->input = devm_input_allocate_device(&device->dev);
        if (!fujitsu_bl->input)
@@ -605,10 +613,10 @@ static int acpi_fujitsu_bl_input_setup(struct acpi_device 
*device)
        fujitsu_bl->input->phys = fujitsu_bl->phys;
        fujitsu_bl->input->id.bustype = BUS_HOST;
        fujitsu_bl->input->id.product = 0x06;
-       fujitsu_bl->input->evbit[0] = BIT(EV_KEY);
-       set_bit(KEY_BRIGHTNESSUP, fujitsu_bl->input->keybit);
-       set_bit(KEY_BRIGHTNESSDOWN, fujitsu_bl->input->keybit);
-       set_bit(KEY_UNKNOWN, fujitsu_bl->input->keybit);
+
+       ret = sparse_keymap_setup(fujitsu_bl->input, keymap_backlight, NULL);
+       if (ret)
+               return ret;
 
        return input_register_device(fujitsu_bl->input);
 }
@@ -714,18 +722,14 @@ static int acpi_fujitsu_bl_remove(struct acpi_device 
*device)
 static void acpi_fujitsu_bl_notify(struct acpi_device *device, u32 event)
 {
        struct input_dev *input;
-       int oldb, newb, keycode;
+       int oldb, newb;
 
        input = fujitsu_bl->input;
 
        if (event != ACPI_FUJITSU_NOTIFY_CODE1) {
-               keycode = KEY_UNKNOWN;
                vdbg_printk(FUJLAPTOP_DBG_WARN,
                            "unsupported event [0x%x]\n", event);
-               input_report_key(input, keycode, 1);
-               input_sync(input);
-               input_report_key(input, keycode, 0);
-               input_sync(input);
+               sparse_keymap_report_event(input, -1, 1, true);
                return;
        }
 
@@ -747,12 +751,7 @@ static void acpi_fujitsu_bl_notify(struct acpi_device 
*device, u32 event)
                        set_lcd_level(newb);
        }
 
-       keycode = oldb < newb ? KEY_BRIGHTNESSUP : KEY_BRIGHTNESSDOWN;
-
-       input_report_key(input, keycode, 1);
-       input_sync(input);
-       input_report_key(input, keycode, 0);
-       input_sync(input);
+       sparse_keymap_report_event(input, oldb < newb, 1, true);
 }
 
 /* ACPI device for hotkey handling */
-- 
2.12.0