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Subject[PATCH v2 7/8] platform/x86: fujitsu-laptop: use device-specific data in LED-related code
Date
In order to perform their duties, all LED callbacks need a pointer to
the struct acpi_device representing the FUJ02E3 ACPI device. To limit
the use of the module-wide pointer, the same pointer should be extracted
from data that gets passed to LED callbacks as arguments. However, LED
core does not currently support supplying driver-specific pointers to
struct led_classdev callbacks, so the latter have to be implemented a
bit differently than backlight device callbacks and platform device
attribute callbacks. As the FUJ02E3 ACPI device is the parent device of
all LED class devices registered by fujitsu-laptop, struct acpi_device
representing the former can be extracted by following the parent link
present inside the struct device belonging to the struct led_classdev
passed as an argument to each LED callback.

To get rid of module-wide structures defining LED class devices,
allocate them dynamically using devm_kzalloc() and initialize them in
acpi_fujitsu_laptop_leds_register().

Signed-off-by: Michał Kępień <kernel@kempniu.pl>
---
drivers/platform/x86/fujitsu-laptop.c | 102 +++++++++++++++++-----------------
1 file changed, 52 insertions(+), 50 deletions(-)

diff --git a/drivers/platform/x86/fujitsu-laptop.c b/drivers/platform/x86/fujitsu-laptop.c
index b78c97ebfee4..3d33be9f88f6 100644
--- a/drivers/platform/x86/fujitsu-laptop.c
+++ b/drivers/platform/x86/fujitsu-laptop.c
@@ -608,6 +608,7 @@ static void fujitsu_laptop_platform_remove(void)
static int logolamp_set(struct led_classdev *cdev,
enum led_brightness brightness)
{
+ struct acpi_device *device = to_acpi_device(cdev->dev->parent);
int poweron = FUNC_LED_ON, always = FUNC_LED_ON;
int ret;

@@ -617,136 +618,128 @@ static int logolamp_set(struct led_classdev *cdev,
if (brightness < LED_FULL)
always = FUNC_LED_OFF;

- ret = call_fext_func(fext, FUNC_LEDS, 0x1, LOGOLAMP_POWERON, poweron);
+ ret = call_fext_func(device, FUNC_LEDS, 0x1, LOGOLAMP_POWERON, poweron);
if (ret < 0)
return ret;

- return call_fext_func(fext, FUNC_LEDS, 0x1, LOGOLAMP_ALWAYS, always);
+ return call_fext_func(device, FUNC_LEDS, 0x1, LOGOLAMP_ALWAYS, always);
}

static enum led_brightness logolamp_get(struct led_classdev *cdev)
{
+ struct acpi_device *device = to_acpi_device(cdev->dev->parent);
int ret;

- ret = call_fext_func(fext, FUNC_LEDS, 0x2, LOGOLAMP_ALWAYS, 0x0);
+ ret = call_fext_func(device, FUNC_LEDS, 0x2, LOGOLAMP_ALWAYS, 0x0);
if (ret == FUNC_LED_ON)
return LED_FULL;

- ret = call_fext_func(fext, FUNC_LEDS, 0x2, LOGOLAMP_POWERON, 0x0);
+ ret = call_fext_func(device, FUNC_LEDS, 0x2, LOGOLAMP_POWERON, 0x0);
if (ret == FUNC_LED_ON)
return LED_HALF;

return LED_OFF;
}

-static struct led_classdev logolamp_led = {
- .name = "fujitsu::logolamp",
- .brightness_set_blocking = logolamp_set,
- .brightness_get = logolamp_get
-};
-
static int kblamps_set(struct led_classdev *cdev,
enum led_brightness brightness)
{
+ struct acpi_device *device = to_acpi_device(cdev->dev->parent);
+
if (brightness >= LED_FULL)
- return call_fext_func(fext, FUNC_LEDS, 0x1, KEYBOARD_LAMPS,
+ return call_fext_func(device, FUNC_LEDS, 0x1, KEYBOARD_LAMPS,
FUNC_LED_ON);
else
- return call_fext_func(fext, FUNC_LEDS, 0x1, KEYBOARD_LAMPS,
+ return call_fext_func(device, FUNC_LEDS, 0x1, KEYBOARD_LAMPS,
FUNC_LED_OFF);
}

static enum led_brightness kblamps_get(struct led_classdev *cdev)
{
+ struct acpi_device *device = to_acpi_device(cdev->dev->parent);
enum led_brightness brightness = LED_OFF;

- if (call_fext_func(fext,
+ if (call_fext_func(device,
FUNC_LEDS, 0x2, KEYBOARD_LAMPS, 0x0) == FUNC_LED_ON)
brightness = LED_FULL;

return brightness;
}

-static struct led_classdev kblamps_led = {
- .name = "fujitsu::kblamps",
- .brightness_set_blocking = kblamps_set,
- .brightness_get = kblamps_get
-};
-
static int radio_led_set(struct led_classdev *cdev,
enum led_brightness brightness)
{
+ struct acpi_device *device = to_acpi_device(cdev->dev->parent);
+
if (brightness >= LED_FULL)
- return call_fext_func(fext, FUNC_FLAGS, 0x5, RADIO_LED_ON,
+ return call_fext_func(device, FUNC_FLAGS, 0x5, RADIO_LED_ON,
RADIO_LED_ON);
else
- return call_fext_func(fext, FUNC_FLAGS, 0x5, RADIO_LED_ON,
+ return call_fext_func(device, FUNC_FLAGS, 0x5, RADIO_LED_ON,
0x0);
}

static enum led_brightness radio_led_get(struct led_classdev *cdev)
{
+ struct acpi_device *device = to_acpi_device(cdev->dev->parent);
enum led_brightness brightness = LED_OFF;

- if (call_fext_func(fext, FUNC_FLAGS, 0x4, 0x0, 0x0) & RADIO_LED_ON)
+ if (call_fext_func(device, FUNC_FLAGS, 0x4, 0x0, 0x0) & RADIO_LED_ON)
brightness = LED_FULL;

return brightness;
}

-static struct led_classdev radio_led = {
- .name = "fujitsu::radio_led",
- .brightness_set_blocking = radio_led_set,
- .brightness_get = radio_led_get,
- .default_trigger = "rfkill-any"
-};
-
static int eco_led_set(struct led_classdev *cdev,
enum led_brightness brightness)
{
+ struct acpi_device *device = to_acpi_device(cdev->dev->parent);
int curr;

- curr = call_fext_func(fext, FUNC_LEDS, 0x2, ECO_LED, 0x0);
+ curr = call_fext_func(device, FUNC_LEDS, 0x2, ECO_LED, 0x0);
if (brightness >= LED_FULL)
- return call_fext_func(fext, FUNC_LEDS, 0x1, ECO_LED,
+ return call_fext_func(device, FUNC_LEDS, 0x1, ECO_LED,
curr | ECO_LED_ON);
else
- return call_fext_func(fext, FUNC_LEDS, 0x1, ECO_LED,
+ return call_fext_func(device, FUNC_LEDS, 0x1, ECO_LED,
curr & ~ECO_LED_ON);
}

static enum led_brightness eco_led_get(struct led_classdev *cdev)
{
+ struct acpi_device *device = to_acpi_device(cdev->dev->parent);
enum led_brightness brightness = LED_OFF;

- if (call_fext_func(fext, FUNC_LEDS, 0x2, ECO_LED, 0x0) & ECO_LED_ON)
+ if (call_fext_func(device, FUNC_LEDS, 0x2, ECO_LED, 0x0) & ECO_LED_ON)
brightness = LED_FULL;

return brightness;
}

-static struct led_classdev eco_led = {
- .name = "fujitsu::eco_led",
- .brightness_set_blocking = eco_led_set,
- .brightness_get = eco_led_get
-};
-
static int acpi_fujitsu_laptop_leds_register(struct acpi_device *device)
{
+ struct led_classdev *led;
int result;

- if (call_fext_func(fext,
+ if (call_fext_func(device,
FUNC_LEDS, 0x0, 0x0, 0x0) & LOGOLAMP_POWERON) {
- result = devm_led_classdev_register(&device->dev,
- &logolamp_led);
+ led = devm_kzalloc(&device->dev, sizeof(*led), GFP_KERNEL);
+ led->name = "fujitsu::logolamp";
+ led->brightness_set_blocking = logolamp_set;
+ led->brightness_get = logolamp_get;
+ result = devm_led_classdev_register(&device->dev, led);
if (result)
return result;
}

- if ((call_fext_func(fext,
+ if ((call_fext_func(device,
FUNC_LEDS, 0x0, 0x0, 0x0) & KEYBOARD_LAMPS) &&
- (call_fext_func(fext, FUNC_BUTTONS, 0x0, 0x0, 0x0) == 0x0)) {
- result = devm_led_classdev_register(&device->dev, &kblamps_led);
+ (call_fext_func(device, FUNC_BUTTONS, 0x0, 0x0, 0x0) == 0x0)) {
+ led = devm_kzalloc(&device->dev, sizeof(*led), GFP_KERNEL);
+ led->name = "fujitsu::kblamps";
+ led->brightness_set_blocking = kblamps_set;
+ led->brightness_get = kblamps_get;
+ result = devm_led_classdev_register(&device->dev, led);
if (result)
return result;
}
@@ -757,8 +750,13 @@ static int acpi_fujitsu_laptop_leds_register(struct acpi_device *device)
* to also have an RF LED. Therefore use bit 24 as an indicator
* that an RF LED is present.
*/
- if (call_fext_func(fext, FUNC_BUTTONS, 0x0, 0x0, 0x0) & BIT(24)) {
- result = devm_led_classdev_register(&device->dev, &radio_led);
+ if (call_fext_func(device, FUNC_BUTTONS, 0x0, 0x0, 0x0) & BIT(24)) {
+ led = devm_kzalloc(&device->dev, sizeof(*led), GFP_KERNEL);
+ led->name = "fujitsu::radio_led";
+ led->brightness_set_blocking = radio_led_set;
+ led->brightness_get = radio_led_get;
+ led->default_trigger = "rfkill-any";
+ result = devm_led_classdev_register(&device->dev, led);
if (result)
return result;
}
@@ -768,10 +766,14 @@ static int acpi_fujitsu_laptop_leds_register(struct acpi_device *device)
* bit 14 seems to indicate presence of said led as well.
* Confirm by testing the status.
*/
- if ((call_fext_func(fext, FUNC_LEDS, 0x0, 0x0, 0x0) & BIT(14)) &&
- (call_fext_func(fext,
+ if ((call_fext_func(device, FUNC_LEDS, 0x0, 0x0, 0x0) & BIT(14)) &&
+ (call_fext_func(device,
FUNC_LEDS, 0x2, ECO_LED, 0x0) != UNSUPPORTED_CMD)) {
- result = devm_led_classdev_register(&device->dev, &eco_led);
+ led = devm_kzalloc(&device->dev, sizeof(*led), GFP_KERNEL);
+ led->name = "fujitsu::eco_led";
+ led->brightness_set_blocking = eco_led_set;
+ led->brightness_get = eco_led_get;
+ result = devm_led_classdev_register(&device->dev, led);
if (result)
return result;
}
--
2.13.0
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