linux-kernel - [PATCH 5.4 80/90] r8152: disable DelayPhyPwrChg

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Date:   Mon,  3 Feb 2020 16:20:23 +0000
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Hayes Wang <hayeswang@...ltek.com>,
        "David S. Miller" <davem@...emloft.net>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.4 80/90] r8152: disable DelayPhyPwrChg

From: Hayes Wang <hayeswang@...ltek.com>

[ Upstream commit aa475d935272481c9ffb1ae54eeca5c1819fbe1a ]

When enabling this, the device would wait an internal signal which
wouldn't be triggered. Then, the device couldn't enter P3 mode, so
the power consumption is increased.

Signed-off-by: Hayes Wang <hayeswang@...ltek.com>
Signed-off-by: David S. Miller <davem@...emloft.net>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/net/usb/r8152.c | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/drivers/net/usb/r8152.c b/drivers/net/usb/r8152.c
index 5f59affa94d0c..6912624eed4ad 100644
--- a/drivers/net/usb/r8152.c
+++ b/drivers/net/usb/r8152.c
@@ -29,7 +29,7 @@
 #define NETNEXT_VERSION		"10"
 
 /* Information for net */
-#define NET_VERSION		"10"
+#define NET_VERSION		"11"
 
 #define DRIVER_VERSION		"v1." NETNEXT_VERSION "." NET_VERSION
 #define DRIVER_AUTHOR "Realtek linux nic maintainers <nic_swsd@...ltek.com>"
@@ -104,6 +104,7 @@
 #define PLA_BP_EN		0xfc38
 
 #define USB_USB2PHY		0xb41e
+#define USB_SSPHYLINK1		0xb426
 #define USB_SSPHYLINK2		0xb428
 #define USB_U2P3_CTRL		0xb460
 #define USB_CSR_DUMMY1		0xb464
@@ -363,6 +364,9 @@
 #define USB2PHY_SUSPEND		0x0001
 #define USB2PHY_L1		0x0002
 
+/* USB_SSPHYLINK1 */
+#define DELAY_PHY_PWR_CHG	BIT(1)
+
 /* USB_SSPHYLINK2 */
 #define pwd_dn_scale_mask	0x3ffe
 #define pwd_dn_scale(x)		((x) << 1)
@@ -4030,6 +4034,10 @@ static void rtl8153_up(struct r8152 *tp)
 	ocp_data &= ~LANWAKE_PIN;
 	ocp_write_byte(tp, MCU_TYPE_PLA, PLA_LWAKE_CTRL_REG, ocp_data);
 
+	ocp_data = ocp_read_word(tp, MCU_TYPE_USB, USB_SSPHYLINK1);
+	ocp_data &= ~DELAY_PHY_PWR_CHG;
+	ocp_write_word(tp, MCU_TYPE_USB, USB_SSPHYLINK1, ocp_data);
+
 	r8153_aldps_en(tp, true);
 
 	switch (tp->version) {
-- 
2.20.1