drivers: counter: Add AGT counter driver support for Renesas RA8

- boards: renesas: Add support for agt.
- drivers: counter: Add support for counter driver use agt
- dts: arm: Add support for agt.
- dts: bindings: Add support for agt counter driver.
- soc: renesas: Add support for agt counter driver.
- samples: drivers: counter: alarm: Add support for RA8

This is initial support with only basic functionality for counter
operation on Zephyr using AGT hardware, current support for
count source is limited to LOCO and PCLKB, other count source
like underflow signal external pin or AGTIO from another AGT
channel will be added in later support

Signed-off-by: Ha Nguyen <[email protected]>
Signed-off-by: Thao Luong <[email protected]>
Signed-off-by: Duy Phuong Hoang. Nguyen <[email protected]>
Signed-off-by: Khoa Nguyen <[email protected]>

Author: thaoluonguw

boards/renesas/ek_ra8d1/doc/index.rst

@@ -106,6 +106,8 @@ The below features are currently supported on Zephyr OS for EK-RA8D1 board:
 +--------------+------------+------------------+
 | PWM          | on-chip    | pwm              |
 +--------------+------------+------------------+
+| COUNTER      | on-chip    | counter          |
++--------------+------------+------------------+
 
 Other hardware features are currently not supported by the port.
 

boards/renesas/ek_ra8m1/doc/index.rst

@@ -108,6 +108,8 @@ The below features are currently supported on Zephyr OS for EK-RA8M1 board:
 +-----------+------------+----------------------+
 | PWM       | on-chip    | pwm                  |
 +-----------+------------+----------------------+
+| COUNTER   | on-chip    | counter              |
++-----------+------------+----------------------+
 
 Other hardware features are currently not supported by the port.
 

boards/renesas/mck_ra8t1/doc/index.rst

@@ -104,6 +104,8 @@ The below features are currently supported on Zephyr OS for MCB-RA8T1 board:
 +--------------+------------+----------------------+
 | PWM          | on-chip    | pwm                  |
 +--------------+------------+----------------------+
+| COUNTER      | on-chip    | counter              |
++--------------+------------+----------------------+
 
 Other hardware features are currently not supported by the port.
 

drivers/counter/CMakeLists.txt

@@ -51,3 +51,4 @@ zephyr_library_sources_ifdef(CONFIG_COUNTER_SHELL               counter_timer_sh
 zephyr_library_sources_ifdef(CONFIG_COUNTER_TIMER_RPI_PICO      counter_rpi_pico_timer.c)
 zephyr_library_sources_ifdef(CONFIG_COUNTER_TIMER_MAX32         counter_max32_timer.c)
 zephyr_library_sources_ifdef(CONFIG_COUNTER_NXP_MRT             counter_nxp_mrt.c)
+zephyr_library_sources_ifdef(CONFIG_COUNTER_RA_AGT              counter_renesas_ra_agt.c)

drivers/counter/Kconfig

@@ -100,4 +100,6 @@ source "drivers/counter/Kconfig.max32_timer"
 
 source "drivers/counter/Kconfig.nxp_mrt"
 
+source "drivers/counter/Kconfig.renesas_ra"
+
 endif # COUNTER

drivers/counter/Kconfig.renesas_ra

@@ -0,0 +1,11 @@
+# Renesas RA Family
+
+# Copyright (c) 2024 Renesas Electronics Corporation
+# SPDX-License-Identifier: Apache-2.0
+
+config COUNTER_RA_AGT
+	bool "Renesas RA AGT driver"
+	default y
+	depends on DT_HAS_RENESAS_RA_AGT_COUNTER_ENABLED
+	help
+	  Enable support for Renesas Low Power Asynchronous General Purpose Timer (AGT) driver.