drivers: gpio: it8801: Add I2C-based GPIO device driver

Add I2C-based GPIO device driver. Supports 16-port GPIO divided
into 3 groups.

Signed-off-by: Tim Lin <[email protected]>

Author: GTLin08

drivers/gpio/CMakeLists.txt

@@ -34,6 +34,7 @@ zephyr_library_sources_ifdef(CONFIG_GPIO_IMX        gpio_imx.c)
 zephyr_library_sources_ifdef(CONFIG_GPIO_INFINEON_CAT1 gpio_ifx_cat1.c)
 zephyr_library_sources_ifdef(CONFIG_GPIO_INTEL      gpio_intel.c)
 zephyr_library_sources_ifdef(CONFIG_GPIO_IPROC      gpio_iproc.c)
+zephyr_library_sources_ifdef(CONFIG_GPIO_ITE_IT8801 gpio_ite_it8801.c)
 zephyr_library_sources_ifdef(CONFIG_GPIO_ITE_IT8XXX2 gpio_ite_it8xxx2.c)
 zephyr_library_sources_ifdef(CONFIG_GPIO_ITE_IT8XXX2_V2 gpio_ite_it8xxx2_v2.c)
 zephyr_library_sources_ifdef(CONFIG_GPIO_KSCAN_ITE_IT8XXX2 gpio_kscan_ite_it8xxx2.c)

drivers/gpio/Kconfig

@@ -127,6 +127,7 @@ source "drivers/gpio/Kconfig.ifx_cat1"
 source "drivers/gpio/Kconfig.imx"
 source "drivers/gpio/Kconfig.intel"
 source "drivers/gpio/Kconfig.iproc"
+source "drivers/gpio/Kconfig.it8801"
 source "drivers/gpio/Kconfig.it8xxx2"
 source "drivers/gpio/Kconfig.litex"
 source "drivers/gpio/Kconfig.lmp90xxx"

drivers/gpio/Kconfig.it8801

@@ -0,0 +1,11 @@
+# Copyright (c) 2024 ITE Corporation. All Rights Reserved.
+# SPDX-License-Identifier: Apache-2.0
+
+config GPIO_ITE_IT8801
+	bool "ITE IT8801 GPIO device driver"
+	default y
+	depends on DT_HAS_ITE_IT8801_GPIO_ENABLED
+	select I2C
+	select MFD
+	help
+	  Enable driver for ITE IT8801 I2C-based GPIO.