From 8234fc1bdf4629fc0fec41ebc2e091c407ef8d6a Mon Sep 17 00:00:00 2001
From: Yu Chien Peter Lin <peterlin@andestech.com>
Date: Fri, 14 Oct 2022 08:32:47 +0800
Subject: lib: utils/reset: Add Andes fdt reset driver support

Add ATCWDT200 as reset device of AE350 platform, this driver requires
SMU to program the reset vector registers before triggering WDT software
restart signal.

dts example:

  smu@f0100000 {
    compatible = "andestech,atcsmu";
    reg = <0x00000000 0xf0100000 0x00000000 0x00001000>;
  };

  wdt: wdt@f0500000 {
    compatible = "andestech,atcwdt200";
    reg = <0x00000000 0xf0500000 0x00000000 0x00001000>;
    interrupts = <3 4>;
    interrupt-parent = <&plic0>;
    clock-frequency = <15000000>;
  };

Signed-off-by: Yu Chien Peter Lin <peterlin@andestech.com>
Reviewed-by: Leo Yu-Chi Liang <ycliang@andestech.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
---
 platform/andes/ae350/Kconfig    | 2 ++
 platform/andes/ae350/platform.c | 3 +++
 2 files changed, 5 insertions(+)

(limited to 'platform')

diff --git a/platform/andes/ae350/Kconfig b/platform/andes/ae350/Kconfig
index f6f50eb..8486f08 100644
--- a/platform/andes/ae350/Kconfig
+++ b/platform/andes/ae350/Kconfig
@@ -8,6 +8,8 @@ config PLATFORM_ANDES_AE350
 	select FDT_SERIAL_UART8250
 	select FDT_TIMER
 	select FDT_TIMER_PLMT
+	select FDT_RESET
+	select FDT_RESET_ATCWDT200
 	default y
 
 if PLATFORM_ANDES_AE350
diff --git a/platform/andes/ae350/platform.c b/platform/andes/ae350/platform.c
index 79736c0..c6a8eeb 100644
--- a/platform/andes/ae350/platform.c
+++ b/platform/andes/ae350/platform.c
@@ -18,6 +18,7 @@
 #include <sbi_utils/fdt/fdt_helper.h>
 #include <sbi_utils/fdt/fdt_fixup.h>
 #include <sbi_utils/irqchip/plic.h>
+#include <sbi_utils/reset/fdt_reset.h>
 #include <sbi_utils/serial/fdt_serial.h>
 #include <sbi_utils/timer/fdt_timer.h>
 #include "platform.h"
@@ -37,6 +38,8 @@ static int ae350_final_init(bool cold_boot)
 	if (!cold_boot)
 		return 0;
 
+	fdt_reset_init();
+
 	fdt = fdt_get_address();
 	fdt_fixups(fdt);
 
-- 
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