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authorMichał Kępień <kernel@kempniu.pl>2016-01-22 15:27:27 +0100
committerDarren Hart <dvhart@linux.intel.com>2016-03-23 10:05:43 -0700
commitcf0d7ea335966744f2a4fc6f882165b7dba54c15 (patch)
treec8be9a3dc71b182dc3f7ed9d616443cf7fa9c6a7 /drivers/leds
parentb7bca2d7ff1a232466fa5447ec27e62bf02b310f (diff)
dell-led: use dell_smbios_find_token() for finding mic DMI tokens
With the advent of dell_smbios_find_token(), dell-led does not need to perform any DMI walking on its own, but it can rather ask dell-smbios to look up the DMI tokens it needs for changing the state of the microphone LED. Signed-off-by: Michał Kępień <kernel@kempniu.pl> Reviewed-by: Pali Rohár <pali.rohar@gmail.com> Acked-by: Jacek Anaszewski <j.anaszewski@samsung.com> Signed-off-by: Darren Hart <dvhart@linux.intel.com>
Diffstat (limited to 'drivers/leds')
-rw-r--r--drivers/leds/Kconfig1
-rw-r--r--drivers/leds/dell-led.c63
2 files changed, 10 insertions, 54 deletions
diff --git a/drivers/leds/Kconfig b/drivers/leds/Kconfig
index 7f940c24a16b..4351cbe57221 100644
--- a/drivers/leds/Kconfig
+++ b/drivers/leds/Kconfig
@@ -443,6 +443,7 @@ config LEDS_DELL_NETBOOKS
tristate "External LED on Dell Business Netbooks"
depends on LEDS_CLASS
depends on X86 && ACPI_WMI
+ depends on DELL_SMBIOS
help
This adds support for the Latitude 2100 and similar
notebooks that have an external LED.
diff --git a/drivers/leds/dell-led.c b/drivers/leds/dell-led.c
index c36acaf566a6..bfa7511374bd 100644
--- a/drivers/leds/dell-led.c
+++ b/drivers/leds/dell-led.c
@@ -17,6 +17,7 @@
#include <linux/module.h>
#include <linux/dmi.h>
#include <linux/dell-led.h>
+#include "../platform/x86/dell-smbios.h"
MODULE_AUTHOR("Louis Davis/Jim Dailey");
MODULE_DESCRIPTION("Dell LED Control Driver");
@@ -59,22 +60,6 @@ struct app_wmi_args {
#define GLOBAL_MIC_MUTE_ENABLE 0x364
#define GLOBAL_MIC_MUTE_DISABLE 0x365
-struct dell_bios_data_token {
- u16 tokenid;
- u16 location;
- u16 value;
-};
-
-struct __attribute__ ((__packed__)) dell_bios_calling_interface {
- struct dmi_header header;
- u16 cmd_io_addr;
- u8 cmd_io_code;
- u32 supported_cmds;
- struct dell_bios_data_token damap[];
-};
-
-static struct dell_bios_data_token dell_mic_tokens[2];
-
static int dell_wmi_perform_query(struct app_wmi_args *args)
{
struct app_wmi_args *bios_return;
@@ -112,43 +97,24 @@ static int dell_wmi_perform_query(struct app_wmi_args *args)
return rc;
}
-static void __init find_micmute_tokens(const struct dmi_header *dm, void *dummy)
-{
- struct dell_bios_calling_interface *calling_interface;
- struct dell_bios_data_token *token;
- int token_size = sizeof(struct dell_bios_data_token);
- int i = 0;
-
- if (dm->type == 0xda && dm->length > 17) {
- calling_interface = container_of(dm,
- struct dell_bios_calling_interface, header);
-
- token = &calling_interface->damap[i];
- while (token->tokenid != 0xffff) {
- if (token->tokenid == GLOBAL_MIC_MUTE_DISABLE)
- memcpy(&dell_mic_tokens[0], token, token_size);
- else if (token->tokenid == GLOBAL_MIC_MUTE_ENABLE)
- memcpy(&dell_mic_tokens[1], token, token_size);
-
- i++;
- token = &calling_interface->damap[i];
- }
- }
-}
-
static int dell_micmute_led_set(int state)
{
+ struct calling_interface_token *token;
struct app_wmi_args args;
- struct dell_bios_data_token *token;
if (!wmi_has_guid(DELL_APP_GUID))
return -ENODEV;
- if (state == 0 || state == 1)
- token = &dell_mic_tokens[state];
+ if (state == 0)
+ token = dell_smbios_find_token(GLOBAL_MIC_MUTE_DISABLE);
+ else if (state == 1)
+ token = dell_smbios_find_token(GLOBAL_MIC_MUTE_ENABLE);
else
return -EINVAL;
+ if (!token)
+ return -ENODEV;
+
memset(&args, 0, sizeof(struct app_wmi_args));
args.class = 1;
@@ -177,14 +143,6 @@ int dell_app_wmi_led_set(int whichled, int on)
}
EXPORT_SYMBOL_GPL(dell_app_wmi_led_set);
-static int __init dell_micmute_led_init(void)
-{
- memset(dell_mic_tokens, 0, sizeof(struct dell_bios_data_token) * 2);
- dmi_walk(find_micmute_tokens, NULL);
-
- return 0;
-}
-
struct bios_args {
unsigned char length;
unsigned char result_code;
@@ -330,9 +288,6 @@ static int __init dell_led_init(void)
if (!wmi_has_guid(DELL_LED_BIOS_GUID) && !wmi_has_guid(DELL_APP_GUID))
return -ENODEV;
- if (wmi_has_guid(DELL_APP_GUID))
- error = dell_micmute_led_init();
-
if (wmi_has_guid(DELL_LED_BIOS_GUID)) {
error = led_off();
if (error != 0)