[PATCH net-next v2 12/13] net: dsa: realtek: rtl8365mb: add RTL8367S support

[Luiz Angelo Daros de Luca <luizluca@gmail.com>]

Realtek's RTL8367S, a 5+2 port 10/100/1000M Ethernet switch.
It shares the same driver family (RTL8367C) with other models
as the RTL8365MB-VC. Its compatible string is "realtek,rtl8367s".

It was tested only with MDIO interface (realtek-mdio), although it might
work out-of-the-box with SMI interface (using realtek-smi).

This patch was based on an unpublished patch from Alvin Šipraga
<alsi@bang-olufsen.dk>.

Tested-by: Arınç ÜNAL <arinc.unal@arinc9.com>
Signed-off-by: Luiz Angelo Daros de Luca <luizluca@gmail.com>
---
 drivers/net/dsa/realtek/Kconfig        |  5 ++++-
 drivers/net/dsa/realtek/realtek-mdio.c |  1 +
 drivers/net/dsa/realtek/realtek-smi.c  |  4 ++++
 drivers/net/dsa/realtek/rtl8365mb.c    | 31 +++++++++++++++++++++-----
 4 files changed, 34 insertions(+), 7 deletions(-)

diff --git a/drivers/net/dsa/realtek/Kconfig b/drivers/net/dsa/realtek/Kconfig
index 73b26171fade..16521500a888 100644
--- a/drivers/net/dsa/realtek/Kconfig
+++ b/drivers/net/dsa/realtek/Kconfig
@@ -31,7 +31,10 @@ config NET_DSA_REALTEK_RTL8365MB
 	depends on NET_DSA_REALTEK_SMI || NET_DSA_REALTEK_MDIO
 	select NET_DSA_TAG_RTL8_4
 	help
-	  Select to enable support for Realtek RTL8365MB
+	  Select to enable support for Realtek RTL8365MB-VC and RTL8367S. This subdriver
+	  might also support RTL8363NB, RTL8363NB-VB, RTL8363SC, RTL8363SC-VB, RTL8364NB,
+	  RTL8364NB-VB, RTL8366SC, RTL8367RB-VB, RTL8367SB, RTL8370MB, RTL8310SR
+	  in the future.
 
 config NET_DSA_REALTEK_RTL8366RB
 	tristate "Realtek RTL8366RB switch subdriver"
diff --git a/drivers/net/dsa/realtek/realtek-mdio.c b/drivers/net/dsa/realtek/realtek-mdio.c
index 08d13bb94d91..0acb95142b7e 100644
--- a/drivers/net/dsa/realtek/realtek-mdio.c
+++ b/drivers/net/dsa/realtek/realtek-mdio.c
@@ -248,6 +248,7 @@ static const struct of_device_id realtek_mdio_of_match[] = {
 	{ .compatible = "realtek,rtl8366s", .data = NULL, },
 #if IS_ENABLED(CONFIG_NET_DSA_REALTEK_RTL8365MB)
 	{ .compatible = "realtek,rtl8365mb", .data = &rtl8365mb_variant, },
+	{ .compatible = "realtek,rtl8367s", .data = &rtl8365mb_variant, },
 #endif
 	{ /* sentinel */ },
 };
diff --git a/drivers/net/dsa/realtek/realtek-smi.c b/drivers/net/dsa/realtek/realtek-smi.c
index 32690bd28128..0fc096b355c5 100644
--- a/drivers/net/dsa/realtek/realtek-smi.c
+++ b/drivers/net/dsa/realtek/realtek-smi.c
@@ -511,6 +511,10 @@ static const struct of_device_id realtek_smi_of_match[] = {
 		.compatible = "realtek,rtl8365mb",
 		.data = &rtl8365mb_variant,
 	},
+	{
+		.compatible = "realtek,rtl8367s",
+		.data = &rtl8365mb_variant,
+	},
 #endif
 	{ /* sentinel */ },
 };
diff --git a/drivers/net/dsa/realtek/rtl8365mb.c b/drivers/net/dsa/realtek/rtl8365mb.c
index b79a4639b283..e58dd4d1e7b8 100644
--- a/drivers/net/dsa/realtek/rtl8365mb.c
+++ b/drivers/net/dsa/realtek/rtl8365mb.c
@@ -103,13 +103,19 @@
 
 /* Chip-specific data and limits */
 #define RTL8365MB_CHIP_ID_8365MB_VC		0x6367
-#define RTL8365MB_LEARN_LIMIT_MAX_8365MB_VC	2112
+#define RTL8365MB_CHIP_VER_8365MB_VC		0x0040
+
+#define RTL8365MB_CHIP_ID_8367S			0x6367
+#define RTL8365MB_CHIP_VER_8367S		0x00A0
+
+#define RTL8365MB_LEARN_LIMIT_MAX		2112
 
 /* Family-specific data and limits */
 #define RTL8365MB_PHYADDRMAX	7
 #define RTL8365MB_NUM_PHYREGS	32
 #define RTL8365MB_PHYREGMAX	(RTL8365MB_NUM_PHYREGS - 1)
-#define RTL8365MB_MAX_NUM_PORTS  7
+// RTL8370MB and RTL8310SR, possibly suportable by this driver, have 10 ports
+#define RTL8365MB_MAX_NUM_PORTS		10
 
 /* Chip identification registers */
 #define RTL8365MB_CHIP_ID_REG		0x1300
@@ -1964,9 +1970,22 @@ static int rtl8365mb_detect(struct realtek_priv *priv)
 
 	switch (chip_id) {
 	case RTL8365MB_CHIP_ID_8365MB_VC:
-		dev_info(priv->dev,
-			 "found an RTL8365MB-VC switch (ver=0x%04x)\n",
-			 chip_ver);
+		switch (chip_ver) {
+		case RTL8365MB_CHIP_VER_8365MB_VC:
+			dev_info(priv->dev,
+				 "found an RTL8365MB-VC switch (ver=0x%04x)\n",
+				 chip_ver);
+			break;
+		case RTL8365MB_CHIP_VER_8367S:
+			dev_info(priv->dev,
+				 "found an RTL8367S switch (ver=0x%04x)\n",
+				 chip_ver);
+			break;
+		default:
+			dev_err(priv->dev, "unrecognized switch version (ver=0x%04x)",
+				chip_ver);
+			return -ENODEV;
+		}
 
 		priv->num_ports = RTL8365MB_MAX_NUM_PORTS;
 
@@ -1974,7 +1993,7 @@ static int rtl8365mb_detect(struct realtek_priv *priv)
 		mb->chip_id = chip_id;
 		mb->chip_ver = chip_ver;
 		mb->port_mask = GENMASK(priv->num_ports - 1, 0);
-		mb->learn_limit_max = RTL8365MB_LEARN_LIMIT_MAX_8365MB_VC;
+		mb->learn_limit_max = RTL8365MB_LEARN_LIMIT_MAX;
 		mb->jam_table = rtl8365mb_init_jam_8365mb_vc;
 		mb->jam_size = ARRAY_SIZE(rtl8365mb_init_jam_8365mb_vc);
 
-- 
2.34.0