[PATCH 2/2] net: dsa: LAN9303: Add basic support for LAN9354

[Jerry Ray]

Adding support for the LAN9354 device by allowing it to use
the LAN9303 DSA driver.  These devices have the same underlying
access and control methods and from a feature set point of view
the LAN9354 is a superset of the LAN9303.

The MDIO access method has been tested on a SAMA5D3-EDS board
with a LAN9354 RMII daughter card.

While the SPI access method should also be the same, it has not
been tested and as such is not included at this time.

Signed-off-by: Jerry Ray <jerry.ray@xxxxxxxxxxxxx>
---
 drivers/net/dsa/Kconfig        |  6 +++---
 drivers/net/dsa/lan9303-core.c | 11 ++++++++---
 drivers/net/dsa/lan9303_mdio.c |  1 +
 3 files changed, 12 insertions(+), 6 deletions(-)

diff --git a/drivers/net/dsa/Kconfig b/drivers/net/dsa/Kconfig
index d8ae0e8af2a0..07507b4820d7 100644
--- a/drivers/net/dsa/Kconfig
+++ b/drivers/net/dsa/Kconfig
@@ -76,7 +76,7 @@ config NET_DSA_SMSC_LAN9303
 	select NET_DSA_TAG_LAN9303
 	select REGMAP
 	help
-	  This enables support for the SMSC/Microchip LAN9303 3 port ethernet
+	  This enables support for the Microchip LAN9303/LAN9354 3 port ethernet
 	  switch chips.
 
 config NET_DSA_SMSC_LAN9303_I2C
@@ -90,11 +90,11 @@ config NET_DSA_SMSC_LAN9303_I2C
 	  for I2C managed mode.
 
 config NET_DSA_SMSC_LAN9303_MDIO
-	tristate "SMSC/Microchip LAN9303 3-ports 10/100 ethernet switch in MDIO managed mode"
+	tristate "Microchip LAN9303/LAN9354 3-ports 10/100 ethernet switch in MDIO managed mode"
 	select NET_DSA_SMSC_LAN9303
 	depends on VLAN_8021Q || VLAN_8021Q=n
 	help
-	  Enable access functions if the SMSC/Microchip LAN9303 is configured
+	  Enable access functions if the Microchip LAN9303/LAN9354 is configured
 	  for MDIO managed mode.
 
 config NET_DSA_VITESSE_VSC73XX
diff --git a/drivers/net/dsa/lan9303-core.c b/drivers/net/dsa/lan9303-core.c
index 17ae02a56bfe..4ea8c95cc23e 100644
--- a/drivers/net/dsa/lan9303-core.c
+++ b/drivers/net/dsa/lan9303-core.c
@@ -22,6 +22,10 @@
  */
 #define LAN9303_CHIP_REV 0x14
 # define LAN9303_CHIP_ID 0x9303
+# define LAN9352_CHIP_ID 0x9352
+# define LAN9353_CHIP_ID 0x9353
+# define LAN9354_CHIP_ID 0x9354
+# define LAN9355_CHIP_ID 0x9355
 #define LAN9303_IRQ_CFG 0x15
 # define LAN9303_IRQ_CFG_IRQ_ENABLE BIT(8)
 # define LAN9303_IRQ_CFG_IRQ_POL BIT(4)
@@ -867,8 +871,9 @@ static int lan9303_check_device(struct lan9303 *chip)
 		return ret;
 	}
 
-	if ((reg >> 16) != LAN9303_CHIP_ID) {
-		dev_err(chip->dev, "expecting LAN9303 chip, but found: %X\n",
+	if (((reg >> 16) != LAN9303_CHIP_ID) &&
+	    ((reg >> 16) != LAN9354_CHIP_ID)) {
+		dev_err(chip->dev, "unexpected device found: LAN%4.4X\n",
 			reg >> 16);
 		return -ENODEV;
 	}
@@ -884,7 +889,7 @@ static int lan9303_check_device(struct lan9303 *chip)
 	if (ret)
 		dev_warn(chip->dev, "failed to disable switching %d\n", ret);
 
-	dev_info(chip->dev, "Found LAN9303 rev. %u\n", reg & 0xffff);
+	dev_info(chip->dev, "Found LAN%4.4X rev. %u\n", (reg >> 16), reg & 0xffff);
 
 	ret = lan9303_detect_phy_setup(chip);
 	if (ret) {
diff --git a/drivers/net/dsa/lan9303_mdio.c b/drivers/net/dsa/lan9303_mdio.c
index bbb7032409ba..d12c55fdc811 100644
--- a/drivers/net/dsa/lan9303_mdio.c
+++ b/drivers/net/dsa/lan9303_mdio.c
@@ -158,6 +158,7 @@ static void lan9303_mdio_shutdown(struct mdio_device *mdiodev)
 
 static const struct of_device_id lan9303_mdio_of_match[] = {
 	{ .compatible = "smsc,lan9303-mdio" },
+	{ .compatible = "microchip,lan9354-mdio" },
 	{ /* sentinel */ },
 };
 MODULE_DEVICE_TABLE(of, lan9303_mdio_of_match);
-- 
2.17.1