linux-kernel - [PATCH] watchdog: sp805_wdt: add arm cmsdk apb wdt support

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Message-Id: <1656037482-19505-1-git-send-email-hptsfb@gmail.com>
Date:   Fri, 24 Jun 2022 10:24:42 +0800
From:   Bing Fan <hptsfb@...il.com>
To:     wim@...ux-watchdog.org, linux@...ck-us.net
Cc:     linux-watchdog@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH] watchdog: sp805_wdt: add arm cmsdk apb wdt support

From: Bing Fan <tombinfan@...cent.com>

Support arm CMSDK ip apb watchdog device.
Description details of this device can be found in the
document DDI0479D_m_class_processor_system_r1p1_trm.pdf
on the arm's document web. Which periphid is 0x001bb824.
The registers are basically the same as the 805, just a
few more: Periphid4/5/6/7 with offset 0xFD0/0xFD4/0xFD8/0xFDC.
For the register description of arm,sp805, please refer
to the document DDI0270-arm-sp805.pdf.

Signed-off-by: Bing Fan <tombinfan@...cent.com>
---
 drivers/watchdog/sp805_wdt.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/watchdog/sp805_wdt.c b/drivers/watchdog/sp805_wdt.c
index f9479a3fe2a6..78ba36689eec 100644
--- a/drivers/watchdog/sp805_wdt.c
+++ b/drivers/watchdog/sp805_wdt.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  * drivers/char/watchdog/sp805-wdt.c
  *
@@ -341,6 +342,10 @@ static const struct amba_id sp805_wdt_ids[] = {
 		.id	= 0x00141805,
 		.mask	= 0x00ffffff,
 	},
+	{
+		.id     = 0x001bb824,
+		.mask   = 0x00ffffff,
+	},
 	{ 0, 0 },
 };

-- 
2.17.1