[PATCH net-next 03/11] r8152: adjust the settings about MAC clock speed down for RTL8153

[Hayes Wang]

The MAC clock speed down could be enabled if the U1/U2 is disabled.

Signed-off-by: Hayes Wang <hayesw...@realtek.com>
---
 drivers/net/usb/r8152.c | 34 +++++++++++++++++++++++++++++-----
 1 file changed, 29 insertions(+), 5 deletions(-)

diff --git a/drivers/net/usb/r8152.c b/drivers/net/usb/r8152.c
index b8c904f..9a794db 100644
--- a/drivers/net/usb/r8152.c
+++ b/drivers/net/usb/r8152.c
@@ -2428,6 +2428,29 @@ static void __rtl_set_wol(struct r8152 *tp, u32 wolopts)
                device_set_wakeup_enable(&tp->udev->dev, false);
 }
 
+static void r8153_mac_clk_spd(struct r8152 *tp, bool enable)
+{
+       /* MAC clock speed down */
+       if (enable) {
+               ocp_write_word(tp, MCU_TYPE_PLA, PLA_MAC_PWR_CTRL,
+                              ALDPS_SPDWN_RATIO);
+               ocp_write_word(tp, MCU_TYPE_PLA, PLA_MAC_PWR_CTRL2,
+                              EEE_SPDWN_RATIO);
+               ocp_write_word(tp, MCU_TYPE_PLA, PLA_MAC_PWR_CTRL3,
+                              PKT_AVAIL_SPDWN_EN | SUSPEND_SPDWN_EN |
+                              U1U2_SPDWN_EN | L1_SPDWN_EN);
+               ocp_write_word(tp, MCU_TYPE_PLA, PLA_MAC_PWR_CTRL4,
+                              PWRSAVE_SPDWN_EN | RXDV_SPDWN_EN | TX10MIDLE_EN |
+                              TP100_SPDWN_EN | TP500_SPDWN_EN | EEE_SPDWN_EN |
+                              TP1000_SPDWN_EN);
+       } else {
+               ocp_write_word(tp, MCU_TYPE_PLA, PLA_MAC_PWR_CTRL, 0);
+               ocp_write_word(tp, MCU_TYPE_PLA, PLA_MAC_PWR_CTRL2, 0);
+               ocp_write_word(tp, MCU_TYPE_PLA, PLA_MAC_PWR_CTRL3, 0);
+               ocp_write_word(tp, MCU_TYPE_PLA, PLA_MAC_PWR_CTRL4, 0);
+       }
+}
+
 static void r8153_u1u2en(struct r8152 *tp, bool enable)
 {
        u8 u1u2[8];
@@ -2533,7 +2556,9 @@ static void rtl8153_runtime_enable(struct r8152 *tp, bool 
enable)
        if (enable) {
                r8153_u1u2en(tp, false);
                r8153_u2p3en(tp, false);
+               r8153_mac_clk_spd(tp, true);
        } else {
+               r8153_mac_clk_spd(tp, false);
                r8153_u2p3en(tp, true);
                r8153_u1u2en(tp, true);
        }
@@ -2881,6 +2906,7 @@ static void r8153_first_init(struct r8152 *tp)
        u32 ocp_data;
        int i;
 
+       r8153_mac_clk_spd(tp, false);
        rxdy_gated_en(tp, true);
        r8153_teredo_off(tp);
 
@@ -2947,6 +2973,8 @@ static void r8153_enter_oob(struct r8152 *tp)
        u32 ocp_data;
        int i;
 
+       r8153_mac_clk_spd(tp, true);
+
        ocp_data = ocp_read_byte(tp, MCU_TYPE_PLA, PLA_OOB_CTRL);
        ocp_data &= ~NOW_IS_OOB;
        ocp_write_byte(tp, MCU_TYPE_PLA, PLA_OOB_CTRL, ocp_data);
@@ -3513,13 +3541,9 @@ static void r8153_init(struct r8152 *tp)
 
        r8153_power_cut_en(tp, false);
        r8153_u1u2en(tp, true);
+       r8153_mac_clk_spd(tp, false);
        usb_enable_lpm(tp->udev);
 
-       /* MAC clock speed down */
-       ocp_write_word(tp, MCU_TYPE_PLA, PLA_MAC_PWR_CTRL, 0);
-       ocp_write_word(tp, MCU_TYPE_PLA, PLA_MAC_PWR_CTRL2, 0);
-       ocp_write_word(tp, MCU_TYPE_PLA, PLA_MAC_PWR_CTRL3, 0);
-       ocp_write_word(tp, MCU_TYPE_PLA, PLA_MAC_PWR_CTRL4, 0);
 
        rtl_tally_reset(tp);
        r8153_u2p3en(tp, true);
-- 
2.7.4