Re: [PATCH v2.3 2/3] watchdog: loongson1: Add Loongson1 SoC watchdog driver

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On 12/04/2016 07:02 AM, Yang Ling wrote:
Add watchdog timer specific driver for Loongson1 SoC.

Signed-off-by: Yang Ling <gnaygnil@xxxxxxxxx>

---
V2.3:
  Set DEFAULT_HEARTBEAT value to ls1x_wdt->timeout.
V2.2:
  Remove the wide character.
  Check the return value for clk_get_rate().
V2.1 from Kelvin Cheung:
  Use max_hw_heartbeat_ms instead of max_timeout.
V2.0:
  Increase the value of the default heartbeat.
  Modify the setup process for register.
  Order include files and Makefile alphabetically.
V1.1:
  Add a little debugging information.
---
 drivers/watchdog/Kconfig         |   7 ++
 drivers/watchdog/Makefile        |   1 +
 drivers/watchdog/loongson1_wdt.c | 170 +++++++++++++++++++++++++++++++++++++++
 3 files changed, 178 insertions(+)
 create mode 100644 drivers/watchdog/loongson1_wdt.c

diff --git a/drivers/watchdog/Kconfig b/drivers/watchdog/Kconfig
index fdd3228..c5b9c6e 100644
--- a/drivers/watchdog/Kconfig
+++ b/drivers/watchdog/Kconfig
@@ -1513,6 +1513,13 @@ config LANTIQ_WDT
 	help
 	  Hardware driver for the Lantiq SoC Watchdog Timer.

+config LOONGSON1_WDT
+	tristate "Loongson1 SoC hardware watchdog"
+	depends on MACH_LOONGSON32
+	select WATCHDOG_CORE
+	help
+	  Hardware driver for the Loongson1 SoC Watchdog Timer.
+
 config RALINK_WDT
 	tristate "Ralink SoC watchdog"
 	select WATCHDOG_CORE
diff --git a/drivers/watchdog/Makefile b/drivers/watchdog/Makefile
index caa9f4a..0c3d35e 100644
--- a/drivers/watchdog/Makefile
+++ b/drivers/watchdog/Makefile
@@ -163,6 +163,7 @@ obj-$(CONFIG_TXX9_WDT) += txx9wdt.o
 obj-$(CONFIG_OCTEON_WDT) += octeon-wdt.o
 octeon-wdt-y := octeon-wdt-main.o octeon-wdt-nmi.o
 obj-$(CONFIG_LANTIQ_WDT) += lantiq_wdt.o
+obj-$(CONFIG_LOONGSON1_WDT) += loongson1_wdt.o
 obj-$(CONFIG_RALINK_WDT) += rt2880_wdt.o
 obj-$(CONFIG_IMGPDC_WDT) += imgpdc_wdt.o
 obj-$(CONFIG_MT7621_WDT) += mt7621_wdt.o
diff --git a/drivers/watchdog/loongson1_wdt.c b/drivers/watchdog/loongson1_wdt.c
new file mode 100644
index 0000000..c43ad38
--- /dev/null
+++ b/drivers/watchdog/loongson1_wdt.c
@@ -0,0 +1,170 @@
+/*
+ * Copyright (c) 2016 Yang Ling <gnaygnil@xxxxxxxxx>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ */
+
+#include <linux/clk.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/watchdog.h>
+#include <loongson1.h>
+
+#define DEFAULT_HEARTBEAT	30
+
+static bool nowayout = WATCHDOG_NOWAYOUT;
+module_param(nowayout, bool, 0444);
+
+static unsigned int heartbeat = DEFAULT_HEARTBEAT;

heartbeat should be 0.

Guenter





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