netdev - [PATCH v1 net-next] net: dsa: mv88e6xxx: 88E6141/6341 SERDES support

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Date:   Thu,  3 May 2018 15:06:48 +0200
From:   Marek Behún <marek.behun@....cz>
To:     netdev@...r.kernel.org
Cc:     Andrew Lunn <andrew@...n.ch>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Vivien Didelot <vivien.didelot@...oirfairelinux.com>,
        Arkadi Sharshevsky <arkadis@...lanox.com>,
        "David S . Miller" <davem@...emloft.net>,
        Marek Behún <marek.behun@....cz>
Subject: [PATCH v1 net-next] net: dsa: mv88e6xxx: 88E6141/6341 SERDES support

The 88E6141/6341 switches (also known as Topaz) have 1 SGMII lane,
which can be configured the same way as the SERDES lane on 88E6390.

Signed-off-by: Marek Behun <marek.behun@....cz>
---
 drivers/net/dsa/mv88e6xxx/chip.c   |  2 ++
 drivers/net/dsa/mv88e6xxx/serdes.c | 20 ++++++++++++++++++++
 drivers/net/dsa/mv88e6xxx/serdes.h |  1 +
 3 files changed, 23 insertions(+)

diff --git a/drivers/net/dsa/mv88e6xxx/chip.c b/drivers/net/dsa/mv88e6xxx/chip.c
index eebda5ec9676..e9600a82dc83 100644
--- a/drivers/net/dsa/mv88e6xxx/chip.c
+++ b/drivers/net/dsa/mv88e6xxx/chip.c
@@ -2426,6 +2426,7 @@ static const struct mv88e6xxx_ops mv88e6141_ops = {
 	.reset = mv88e6352_g1_reset,
 	.vtu_getnext = mv88e6352_g1_vtu_getnext,
 	.vtu_loadpurge = mv88e6352_g1_vtu_loadpurge,
+	.serdes_power = mv88e6341_serdes_power,
 };
 
 static const struct mv88e6xxx_ops mv88e6161_ops = {
@@ -2924,6 +2925,7 @@ static const struct mv88e6xxx_ops mv88e6341_ops = {
 	.reset = mv88e6352_g1_reset,
 	.vtu_getnext = mv88e6352_g1_vtu_getnext,
 	.vtu_loadpurge = mv88e6352_g1_vtu_loadpurge,
+	.serdes_power = mv88e6341_serdes_power,
 };
 
 static const struct mv88e6xxx_ops mv88e6350_ops = {
diff --git a/drivers/net/dsa/mv88e6xxx/serdes.c b/drivers/net/dsa/mv88e6xxx/serdes.c
index f3c01119b3d1..cd03a62946e3 100644
--- a/drivers/net/dsa/mv88e6xxx/serdes.c
+++ b/drivers/net/dsa/mv88e6xxx/serdes.c
@@ -227,3 +227,23 @@ int mv88e6390_serdes_power(struct mv88e6xxx_chip *chip, int port, bool on)
 
 	return 0;
 }
+
+int mv88e6341_serdes_power(struct mv88e6xxx_chip *chip, int port, bool on)
+{
+	int err;
+	u8 cmode;
+
+	if (port != 5)
+		return 0;
+
+	err = mv88e6xxx_port_get_cmode(chip, port, &cmode);
+	if (err)
+		return err;
+
+	if ((cmode == MV88E6XXX_PORT_STS_CMODE_1000BASE_X) ||
+	     (cmode == MV88E6XXX_PORT_STS_CMODE_SGMII) ||
+	     (cmode == MV88E6XXX_PORT_STS_CMODE_2500BASEX))
+		return mv88e6390_serdes_sgmii(chip, 0x15, on);
+
+	return 0;
+}
diff --git a/drivers/net/dsa/mv88e6xxx/serdes.h b/drivers/net/dsa/mv88e6xxx/serdes.h
index 5c1cd6d8e9a5..d7dc6decf69b 100644
--- a/drivers/net/dsa/mv88e6xxx/serdes.h
+++ b/drivers/net/dsa/mv88e6xxx/serdes.h
@@ -42,6 +42,7 @@
 #define MV88E6390_SGMII_CONTROL_LOOPBACK	BIT(14)
 #define MV88E6390_SGMII_CONTROL_PDOWN		BIT(11)
 
+int mv88e6341_serdes_power(struct mv88e6xxx_chip *chip, int port, bool on);
 int mv88e6352_serdes_power(struct mv88e6xxx_chip *chip, int port, bool on);
 int mv88e6390_serdes_power(struct mv88e6xxx_chip *chip, int port, bool on);
 
-- 
2.16.1