diff options
| -rw-r--r-- | drivers/platform/x86/lenovo-yogabook-wmi.c | 22 |
1 files changed, 21 insertions, 1 deletions
diff --git a/drivers/platform/x86/lenovo-yogabook-wmi.c b/drivers/platform/x86/lenovo-yogabook-wmi.c index 00ca9f50f0da..b8d0239192cb 100644 --- a/drivers/platform/x86/lenovo-yogabook-wmi.c +++ b/drivers/platform/x86/lenovo-yogabook-wmi.c @@ -19,6 +19,7 @@ #include <linux/leds.h> #include <linux/module.h> #include <linux/platform_device.h> +#include <linux/pwm.h> #include <linux/wmi.h> #include <linux/workqueue.h> @@ -26,6 +27,7 @@ #define YB_KBD_BL_DEFAULT 128 #define YB_KBD_BL_MAX 255 +#define YB_KBD_BL_PWM_PERIOD 13333 #define YB_PDEV_NAME "yogabook-touch-kbd-digitizer-switch" @@ -48,6 +50,7 @@ struct yogabook_data { struct gpio_desc *pen_touch_event; struct gpio_desc *kbd_bl_led_enable; struct gpio_desc *backside_hall_gpio; + struct pwm_device *kbd_bl_pwm; int (*set_kbd_backlight)(struct yogabook_data *data, uint8_t level); int pen_touch_irq; int backside_hall_irq; @@ -267,8 +270,11 @@ static int yogabook_suspend(struct device *dev) struct yogabook_data *data = dev_get_drvdata(dev); set_bit(YB_SUSPENDED, &data->flags); - flush_work(&data->work); + + if (test_bit(YB_KBD_IS_ON, &data->flags)) + data->set_kbd_backlight(data, 0); + return 0; } @@ -423,6 +429,13 @@ static struct gpiod_lookup_table yogabook_pdev_gpios = { static int yogabook_pdev_set_kbd_backlight(struct yogabook_data *data, u8 level) { + struct pwm_state state = { + .period = YB_KBD_BL_PWM_PERIOD, + .duty_cycle = YB_KBD_BL_PWM_PERIOD * level / YB_KBD_BL_MAX, + .enabled = level, + }; + + pwm_apply_state(data->kbd_bl_pwm, &state); gpiod_set_value(data->kbd_bl_led_enable, level ? 1 : 0); return 0; } @@ -472,6 +485,13 @@ static int yogabook_pdev_probe(struct platform_device *pdev) goto error_put_devs; } + data->kbd_bl_pwm = devm_pwm_get(dev, "pwm_soc_lpss_2"); + if (IS_ERR(data->kbd_bl_pwm)) { + r = dev_err_probe(dev, PTR_ERR(data->kbd_bl_pwm), + "Getting keyboard backlight PWM\n"); + goto error_put_devs; + } + r = gpiod_to_irq(data->pen_touch_event); if (r < 0) { dev_err_probe(dev, r, "Getting pen_touch_event IRQ\n"); |