net: dsa: realtek: convert subdrivers into modules

Preparing for multiple interfaces support, the drivers
must be independent of realtek-smi.

Signed-off-by: Luiz Angelo Daros de Luca <luizluca@gmail.com>
Tested-by: Arınç ÜNAL <arinc.unal@arinc9.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Reviewed-by: Alvin Šipraga <alsi@bang-olufsen.dk>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>

drivers/net/dsa/realtek/Kconfig

@@ -2,8 +2,6 @@
 menuconfig NET_DSA_REALTEK
 	tristate "Realtek Ethernet switch family support"
 	depends on NET_DSA
-	select NET_DSA_TAG_RTL4_A
-	select NET_DSA_TAG_RTL8_4
 	select FIXED_PHY
 	select IRQ_DOMAIN
 	select REALTEK_PHY
@@ -18,3 +16,21 @@ config NET_DSA_REALTEK_SMI
 	help
 	  Select to enable support for registering switches connected
 	  through SMI.
+
+config NET_DSA_REALTEK_RTL8365MB
+	tristate "Realtek RTL8365MB switch subdriver"
+	default y
+	depends on NET_DSA_REALTEK
+	depends on NET_DSA_REALTEK_SMI
+	select NET_DSA_TAG_RTL8_4
+	help
+	  Select to enable support for Realtek RTL8365MB
+
+config NET_DSA_REALTEK_RTL8366RB
+	tristate "Realtek RTL8366RB switch subdriver"
+	default y
+	depends on NET_DSA_REALTEK
+	depends on NET_DSA_REALTEK_SMI
+	select NET_DSA_TAG_RTL4_A
+	help
+	  Select to enable support for Realtek RTL8366RB

drivers/net/dsa/realtek/Makefile

@@ -1,3 +1,5 @@
 # SPDX-License-Identifier: GPL-2.0
 obj-$(CONFIG_NET_DSA_REALTEK_SMI) 	+= realtek-smi.o
-realtek-smi-objs			:= realtek-smi-core.o rtl8366.o rtl8366rb.o rtl8365mb.o
+obj-$(CONFIG_NET_DSA_REALTEK_RTL8366RB) += rtl8366.o
+rtl8366-objs 				:= rtl8366-core.o rtl8366rb.o
+obj-$(CONFIG_NET_DSA_REALTEK_RTL8365MB) += rtl8365mb.o

drivers/net/dsa/realtek/realtek-smi-core.c → drivers/net/dsa/realtek/realtek-smi.c

@@ -494,19 +494,23 @@ static void realtek_smi_shutdown(struct platform_device *pdev)
 }
 
 static const struct of_device_id realtek_smi_of_match[] = {
+#if IS_ENABLED(CONFIG_NET_DSA_REALTEK_RTL8366RB)
 	{
 		.compatible = "realtek,rtl8366rb",
 		.data = &rtl8366rb_variant,
 	},
+#endif
 	{
 		/* FIXME: add support for RTL8366S and more */
 		.compatible = "realtek,rtl8366s",
 		.data = NULL,
 	},
+#if IS_ENABLED(CONFIG_NET_DSA_REALTEK_RTL8365MB)
 	{
 		.compatible = "realtek,rtl8365mb",
 		.data = &rtl8365mb_variant,
 	},
+#endif
 	{ /* sentinel */ },
 };
 MODULE_DEVICE_TABLE(of, realtek_smi_of_match);
@@ -522,4 +526,6 @@ static struct platform_driver realtek_smi_driver = {
 };
 module_platform_driver(realtek_smi_driver);
 
+MODULE_AUTHOR("Linus Walleij <linus.walleij@linaro.org>");
+MODULE_DESCRIPTION("Driver for Realtek ethernet switch connected via SMI interface");
 MODULE_LICENSE("GPL");

drivers/net/dsa/realtek/rtl8365mb.c

@@ -1986,3 +1986,7 @@ const struct realtek_variant rtl8365mb_variant = {
 	.chip_data_sz = sizeof(struct rtl8365mb),
 };
 EXPORT_SYMBOL_GPL(rtl8365mb_variant);
+
+MODULE_AUTHOR("Alvin Šipraga <alsi@bang-olufsen.dk>");
+MODULE_DESCRIPTION("Driver for RTL8365MB-VC ethernet switch");
+MODULE_LICENSE("GPL");

drivers/net/dsa/realtek/rtl8366rb.c

@@ -1816,3 +1816,7 @@ const struct realtek_variant rtl8366rb_variant = {
 	.chip_data_sz = sizeof(struct rtl8366rb),
 };
 EXPORT_SYMBOL_GPL(rtl8366rb_variant);
+
+MODULE_AUTHOR("Linus Walleij <linus.walleij@linaro.org>");
+MODULE_DESCRIPTION("Driver for RTL8366RB ethernet switch");
+MODULE_LICENSE("GPL");