iwlagn: modify digital SVR for 1000

On 1000, there are two Switching Voltage Regulators (SVR). The first one
apply digital voltage level (1.32V) for PCIe block and core. We need to
use this regulator to solve a stability issue related to noisy DC2DC
line in the silicon.

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, 7 insertions, 0 deletions

diff --git a/drivers/net/wireless/iwlwifi/iwl-5000.c b/drivers/net/wireless/iwlwifi/iwl-5000.c
index 85e8bac499a7..3f9da6e47108 100644
--- a/drivers/net/wireless/iwlwifi/iwl-5000.c
+++ b/drivers/net/wireless/iwlwifi/iwl-5000.c
@@ -239,6 +239,13 @@ static void iwl5000_nic_config(struct iwl_priv *priv)
                                 APMG_PS_CTRL_EARLY_PWR_OFF_RESET_DIS,
                                 ~APMG_PS_CTRL_EARLY_PWR_OFF_RESET_DIS);
 
+        if ((priv->hw_rev & CSR_HW_REV_TYPE_MSK) == CSR_HW_REV_TYPE_1000) {
+                /* Setting digital SVR for 1000 card to 1.32V */
+                iwl_set_bits_mask_prph(priv, APMG_DIGITAL_SVR_REG,
+                                        APMG_SVR_DIGITAL_VOLTAGE_1_32,
+                                        ~APMG_SVR_VOLTAGE_CONFIG_BIT_MSK);
+        }
+
         spin_unlock_irqrestore(&priv->lock, flags);
 }