iwlwifi: Adjust blink rate to compensate Clock difference

Adjust led blink rate to compensate on a MAC Clock difference on every
HW. Led blink rate analysis showed an average deviation of 0% on 3945,
5% on 4965 HW and 20% on 5000 series and up.
Need to compensate on the led on/off time per HW according to the
deviation to achieve the desired led frequency
The calculation is: (100-averageDeviation)/100 * blinkTime
For code efficiency the calculation will be:
    compensation = (100 - averageDeviation) * 64 / 100
    NewBlinkTime = (compensation * BlinkTime) / 64

Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Signed-off-by: Reinette Chatre <reinette.chatre@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 5 insertions, 0 deletions

diff --git a/drivers/net/wireless/iwlwifi/iwl-6000.c b/drivers/net/wireless/iwlwifi/iwl-6000.c
index 4b3fb4095678..48b2b7d2170c 100644
--- a/drivers/net/wireless/iwlwifi/iwl-6000.c
+++ b/drivers/net/wireless/iwlwifi/iwl-6000.c
@@ -258,6 +258,7 @@ struct iwl_cfg iwl6000h_2agn_cfg = {
         .max_ll_items = OTP_MAX_LL_ITEMS_6x00,
         .shadow_ram_support = true,
         .ht_greenfield_support = true,
+        .led_compensation = 51,
 };
 
 /*
@@ -281,6 +282,7 @@ struct iwl_cfg iwl6000i_2agn_cfg = {
         .max_ll_items = OTP_MAX_LL_ITEMS_6x00,
         .shadow_ram_support = true,
         .ht_greenfield_support = true,
+        .led_compensation = 51,
 };
 
 struct iwl_cfg iwl6050_2agn_cfg = {
@@ -301,6 +303,7 @@ struct iwl_cfg iwl6050_2agn_cfg = {
         .max_ll_items = OTP_MAX_LL_ITEMS_6x00,
         .shadow_ram_support = true,
         .ht_greenfield_support = true,
+        .led_compensation = 51,
 };
 
 struct iwl_cfg iwl6000_3agn_cfg = {
@@ -321,6 +324,7 @@ struct iwl_cfg iwl6000_3agn_cfg = {
         .max_ll_items = OTP_MAX_LL_ITEMS_6x00,
         .shadow_ram_support = true,
         .ht_greenfield_support = true,
+        .led_compensation = 51,
 };
 
 struct iwl_cfg iwl6050_3agn_cfg = {
@@ -341,6 +345,7 @@ struct iwl_cfg iwl6050_3agn_cfg = {
         .max_ll_items = OTP_MAX_LL_ITEMS_6x00,
         .shadow_ram_support = true,
         .ht_greenfield_support = true,
+        .led_compensation = 51,
 };
 
 MODULE_FIRMWARE(IWL6000_MODULE_FIRMWARE(IWL6000_UCODE_API_MAX));