thingino-kopt: add an I2C2 pin selection for T23

Mirrors the I2C1 choice now that the kernel offers PB20/PB21 and
PB27/PB28 on T23. Defaults to PB20/PB21, which is what the kernel
choice already falls through to.

Author: gtxaspec

package/thingino-kopt/Config.in

@@ -382,6 +382,28 @@ config BR2_PACKAGE_THINGINO_KOPT_I2C_BUS2
 	help
 	  Enables I2C2 on the SoC
 
+if BR2_PACKAGE_THINGINO_KOPT_I2C_BUS2 && BR2_SOC_FAMILY = "t23"
+
+choice
+	prompt "I2C2 Pin Selection"
+	default BR2_PACKAGE_THINGINO_KOPT_I2C_BUS2_PB20_PB21
+
+config BR2_PACKAGE_THINGINO_KOPT_I2C_BUS2_PB20_PB21
+	bool "I2C2 on PB20/PB21"
+	help
+	  Routes I2C2 to GPIO PB20 and PB21.
+
+config BR2_PACKAGE_THINGINO_KOPT_I2C_BUS2_PB27_PB28
+	bool "I2C2 on PB27/PB28"
+	help
+	  Routes I2C2 to GPIO PB27 and PB28.
+
+	  PB27 is shared with the OTG DRVVBUS pin.
+
+endchoice
+
+endif
+
 config BR2_PACKAGE_THINGINO_KOPT_USB_MASS_STORAGE
 	bool "USB Storage"
 	depends on BR2_PACKAGE_THINGINO_KOPT

package/thingino-kopt/thingino-kopt.mk

@@ -275,6 +275,18 @@ define THINGINO_KOPT_LINUX_CONFIG_FIXUPS_I2C2
 endef
 endif
 
+ifeq ($(BR2_PACKAGE_THINGINO_KOPT_I2C_BUS2_PB20_PB21),y)
+define THINGINO_KOPT_LINUX_CONFIG_FIXUPS_I2C2_PB20_PB21
+	$(call KCONFIG_ENABLE_OPT,CONFIG_I2C2_PB20_PB21)
+endef
+endif
+
+ifeq ($(BR2_PACKAGE_THINGINO_KOPT_I2C_BUS2_PB27_PB28),y)
+define THINGINO_KOPT_LINUX_CONFIG_FIXUPS_I2C2_PB27_PB28
+	$(call KCONFIG_ENABLE_OPT,CONFIG_I2C2_PB27_PB28)
+endef
+endif
+
 ################ CIFS FS #########################
 
 ifeq ($(BR2_PACKAGE_THINGINO_KOPT_CIFS),y)
@@ -570,6 +582,8 @@ define THINGINO_KOPT_LINUX_CONFIG_FIXUPS
 	$(call THINGINO_KOPT_LINUX_CONFIG_FIXUPS_I2C1_PB25_PB26)
 	$(call THINGINO_KOPT_LINUX_CONFIG_FIXUPS_I2C1_PA16_PA17)
 	$(call THINGINO_KOPT_LINUX_CONFIG_FIXUPS_I2C2)
+	$(call THINGINO_KOPT_LINUX_CONFIG_FIXUPS_I2C2_PB20_PB21)
+	$(call THINGINO_KOPT_LINUX_CONFIG_FIXUPS_I2C2_PB27_PB28)
 	$(call THINGINO_KOPT_LINUX_CONFIG_FIXUPS_USB_MASS_STORAGE)
 	$(call THINGINO_KOPT_LINUX_CONFIG_FIXUPS_EXTFS)
 	$(call THINGINO_KOPT_LINUX_CONFIG_FIXUPS_MMC_BOOT)