diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/acpi/button.c | 61 |
1 files changed, 61 insertions, 0 deletions
diff --git a/drivers/acpi/button.c b/drivers/acpi/button.c index 6e291c17e43a..148f4e5ca104 100644 --- a/drivers/acpi/button.c +++ b/drivers/acpi/button.c @@ -53,6 +53,10 @@ #define ACPI_BUTTON_DEVICE_NAME_LID "Lid Switch" #define ACPI_BUTTON_TYPE_LID 0x05 +#define ACPI_BUTTON_LID_INIT_IGNORE 0x00 +#define ACPI_BUTTON_LID_INIT_OPEN 0x01 +#define ACPI_BUTTON_LID_INIT_METHOD 0x02 + #define _COMPONENT ACPI_BUTTON_COMPONENT ACPI_MODULE_NAME("button"); @@ -105,6 +109,7 @@ struct acpi_button { static BLOCKING_NOTIFIER_HEAD(acpi_lid_notifier); static struct acpi_device *lid_device; +static u8 lid_init_state = ACPI_BUTTON_LID_INIT_METHOD; /* -------------------------------------------------------------------------- FS Interface (/proc) @@ -285,6 +290,21 @@ static int acpi_lid_update_state(struct acpi_device *device) return acpi_lid_notify_state(device, state); } +static void acpi_lid_initialize_state(struct acpi_device *device) +{ + switch (lid_init_state) { + case ACPI_BUTTON_LID_INIT_OPEN: + (void)acpi_lid_notify_state(device, 1); + break; + case ACPI_BUTTON_LID_INIT_METHOD: + (void)acpi_lid_update_state(device); + break; + case ACPI_BUTTON_LID_INIT_IGNORE: + default: + break; + } +} + static void acpi_button_notify(struct acpi_device *device, u32 event) { struct acpi_button *button = acpi_driver_data(device); @@ -341,6 +361,8 @@ static int acpi_button_resume(struct device *dev) struct acpi_button *button = acpi_driver_data(device); button->suspended = false; + if (button->type == ACPI_BUTTON_TYPE_LID) + acpi_lid_initialize_state(device); return 0; } #endif @@ -421,6 +443,7 @@ static int acpi_button_add(struct acpi_device *device) if (error) goto err_remove_fs; if (button->type == ACPI_BUTTON_TYPE_LID) { + acpi_lid_initialize_state(device); /* * This assumes there's only one lid device, or if there are * more we only care about the last one... @@ -450,4 +473,42 @@ static int acpi_button_remove(struct acpi_device *device) return 0; } +static int param_set_lid_init_state(const char *val, struct kernel_param *kp) +{ + int result = 0; + + if (!strncmp(val, "open", sizeof("open") - 1)) { + lid_init_state = ACPI_BUTTON_LID_INIT_OPEN; + pr_info("Notify initial lid state as open\n"); + } else if (!strncmp(val, "method", sizeof("method") - 1)) { + lid_init_state = ACPI_BUTTON_LID_INIT_METHOD; + pr_info("Notify initial lid state with _LID return value\n"); + } else if (!strncmp(val, "ignore", sizeof("ignore") - 1)) { + lid_init_state = ACPI_BUTTON_LID_INIT_IGNORE; + pr_info("Do not notify initial lid state\n"); + } else + result = -EINVAL; + return result; +} + +static int param_get_lid_init_state(char *buffer, struct kernel_param *kp) +{ + switch (lid_init_state) { + case ACPI_BUTTON_LID_INIT_OPEN: + return sprintf(buffer, "open"); + case ACPI_BUTTON_LID_INIT_METHOD: + return sprintf(buffer, "method"); + case ACPI_BUTTON_LID_INIT_IGNORE: + return sprintf(buffer, "ignore"); + default: + return sprintf(buffer, "invalid"); + } + return 0; +} + +module_param_call(lid_init_state, + param_set_lid_init_state, param_get_lid_init_state, + NULL, 0644); +MODULE_PARM_DESC(lid_init_state, "Behavior for reporting LID initial state"); + module_acpi_driver(acpi_button_driver); |