diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/platform/x86/thinkpad_acpi.c | 92 |
1 files changed, 91 insertions, 1 deletions
diff --git a/drivers/platform/x86/thinkpad_acpi.c b/drivers/platform/x86/thinkpad_acpi.c index 03ca6c139f1..0b7efb269cf 100644 --- a/drivers/platform/x86/thinkpad_acpi.c +++ b/drivers/platform/x86/thinkpad_acpi.c @@ -23,7 +23,7 @@ #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt -#define TPACPI_VERSION "0.24" +#define TPACPI_VERSION "0.25" #define TPACPI_SYSFS_VERSION 0x020700 /* @@ -88,6 +88,7 @@ #include <linux/pci_ids.h> +#include <linux/thinkpad_acpi.h> /* ThinkPad CMOS commands */ #define TP_CMOS_VOLUME_DOWN 0 @@ -8350,6 +8351,91 @@ static struct ibm_struct fan_driver_data = { .resume = fan_resume, }; +/************************************************************************* + * Mute LED subdriver + */ + + +struct tp_led_table { + acpi_string name; + int on_value; + int off_value; + int state; +}; + +static struct tp_led_table led_tables[] = { + [TPACPI_LED_MUTE] = { + .name = "SSMS", + .on_value = 1, + .off_value = 0, + }, + [TPACPI_LED_MICMUTE] = { + .name = "MMTS", + .on_value = 2, + .off_value = 0, + }, +}; + +static int mute_led_on_off(struct tp_led_table *t, bool state) +{ + acpi_handle temp; + int output; + + if (!ACPI_SUCCESS(acpi_get_handle(hkey_handle, t->name, &temp))) { + pr_warn("Thinkpad ACPI has no %s interface.\n", t->name); + return -EIO; + } + + if (!acpi_evalf(hkey_handle, &output, t->name, "dd", + state ? t->on_value : t->off_value)) + return -EIO; + + t->state = state; + return state; +} + +int tpacpi_led_set(int whichled, bool on) +{ + struct tp_led_table *t; + + if (whichled < 0 || whichled >= TPACPI_LED_MAX) + return -EINVAL; + + t = &led_tables[whichled]; + if (t->state < 0 || t->state == on) + return t->state; + return mute_led_on_off(t, on); +} +EXPORT_SYMBOL_GPL(tpacpi_led_set); + +static int mute_led_init(struct ibm_init_struct *iibm) +{ + acpi_handle temp; + int i; + + for (i = 0; i < TPACPI_LED_MAX; i++) { + struct tp_led_table *t = &led_tables[i]; + if (ACPI_SUCCESS(acpi_get_handle(hkey_handle, t->name, &temp))) + mute_led_on_off(t, false); + else + t->state = -ENODEV; + } + return 0; +} + +static void mute_led_exit(void) +{ + int i; + + for (i = 0; i < TPACPI_LED_MAX; i++) + tpacpi_led_set(i, false); +} + +static struct ibm_struct mute_led_driver_data = { + .name = "mute_led", + .exit = mute_led_exit, +}; + /**************************************************************************** **************************************************************************** * @@ -8768,6 +8854,10 @@ static struct ibm_init_struct ibms_init[] __initdata = { .init = fan_init, .data = &fan_driver_data, }, + { + .init = mute_led_init, + .data = &mute_led_driver_data, + }, }; static int __init set_ibm_param(const char *val, struct kernel_param *kp) |