driver: gpio: mcp23xxx: Refactor to generic.

Refactor the mcp230xx driver to generically also support
SPI IO expanders, renaming it to mcp23xxx in the process.

Signed-off-by: Peter Johanson <[email protected]>

drivers/gpio/CMakeLists.txt

@@ -13,6 +13,8 @@ zephyr_library_sources_ifdef(CONFIG_GPIO_GECKO      gpio_gecko.c)
 zephyr_library_sources_ifdef(CONFIG_GPIO_IMX        gpio_imx.c)
 zephyr_library_sources_ifdef(CONFIG_GPIO_ITE_IT8XXX2 gpio_ite_it8xxx2.c)
 zephyr_library_sources_ifdef(CONFIG_GPIO_MCP23S17   gpio_mcp23s17.c)
+zephyr_library_sources_ifdef(CONFIG_GPIO_MCP23XXX   gpio_mcp23xxx.c)
+zephyr_library_sources_ifdef(CONFIG_GPIO_MCP23SXX   gpio_mcp23sxx.c)
 zephyr_library_sources_ifdef(CONFIG_GPIO_MCP230XX   gpio_mcp230xx.c)
 zephyr_library_sources_ifdef(CONFIG_GPIO_MCUX       gpio_mcux.c)
 zephyr_library_sources_ifdef(CONFIG_GPIO_MCUX_IGPIO gpio_mcux_igpio.c)

drivers/gpio/Kconfig

@@ -35,7 +35,7 @@ source "drivers/gpio/Kconfig.pca95xx"
 
 source "drivers/gpio/Kconfig.mcp23s17"
 
-source "drivers/gpio/Kconfig.mcp230xx"
+source "drivers/gpio/Kconfig.mcp23xxx"
 
 source "drivers/gpio/Kconfig.mcux"
 

drivers/gpio/Kconfig.mcp23xxx

@@ -0,0 +1,50 @@
+# MCP23S17 GPIO configuration options
+
+# Copyright (c) 2021 metraTec GmbH
+# SPDX-License-Identifier: Apache-2.0
+
+# Workaround for not being able to have commas in macro arguments
+DT_COMPAT_MICROCHIP_MCP230xx := microchip,mcp230xx
+DT_COMPAT_MICROCHIP_MCP23Sxx := microchip,mcp23sxx
+
+config GPIO_MCP23XXX
+	bool
+	help
+	  Enable support for the Microchip 23xxx I2C/SPI IO
+	  expanders.
+
+menuconfig GPIO_MCP230XX
+	bool "MCP230XX I2C-based GPIO chip"
+	default $(dt_compat_enabled,$(DT_COMPAT_MICROCHIP_MCP230xx))
+	depends on I2C
+	select GPIO_MCP23XXX
+	help
+	  Enable driver for MCP230XX I2C-based GPIO chip.
+
+if GPIO_MCP230XX
+
+config GPIO_MCP230XX_INIT_PRIORITY
+	int "MCP230XX GPIO expander init priority"
+	default 75
+	help
+	  Device driver initialization priority.
+
+endif #GPIO_MCP230XX
+
+menuconfig GPIO_MCP23SXX
+	bool "MCP23SXX SPI-based GPIO chip"
+	default $(dt_compat_enabled,$(DT_COMPAT_MICROCHIP_MCP23Sxx))
+	depends on SPI
+	select GPIO_MCP23XXX
+	help
+	  Enable driver for MCP23SXX SPI-based GPIO chip.
+
+if GPIO_MCP23SXX
+
+config GPIO_MCP23SXX_INIT_PRIORITY
+	int "MCP23SXX GPIO expander init priority"
+	default 75
+	help
+	  Device driver initialization priority.
+
+endif #GPIO_MCP23SXX