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Date: Mon, 4 Mar 2013 20:54:17 -0800
From: Guenter Roeck <linux@...ck-us.net>
To: linux-watchdog@...r.kernel.org
Cc: Wim Van Sebroeck <wim@...ana.be>, linux-kernel@...r.kernel.org,
Guenter Roeck <linux@...ck-us.net>
Subject: [PATCH 6/8] watchdog: w83627hf: Add support for additional chips
W83667HG-B, NCT6775, NCT6776 have the same watchdog registers as the
other supported chips but require a slightly different initialization.
Signed-off-by: Guenter Roeck <linux@...ck-us.net>
---
drivers/watchdog/Kconfig | 18 ++++++++++++++----
drivers/watchdog/w83627hf_wdt.c | 29 ++++++++++++++++++++++++++++-
2 files changed, 42 insertions(+), 5 deletions(-)
diff --git a/drivers/watchdog/Kconfig b/drivers/watchdog/Kconfig
index dd462af..346bc70 100644
--- a/drivers/watchdog/Kconfig
+++ b/drivers/watchdog/Kconfig
@@ -854,13 +854,23 @@ config VIA_WDT
Most people will say N.
config W83627HF_WDT
- tristate "W83627HF/W83627DHG Watchdog Timer"
+ tristate "Watchdog timer for W83627HF/W83627DHG and compatibles"
depends on X86
select WATCHDOG_CORE
---help---
- This is the driver for the hardware watchdog on the W83627HF chipset
- as used in Advantech PC-9578 and Tyan S2721-533 motherboards
- (and likely others). The driver also supports the W83627DHG chip.
+ This is the driver for the hardware watchdog on the following
+ Super I/O chips.
+ W83627DHG
+ W83627HF
+ W83627EHF
+ W83627THF
+ W83627UHG
+ W83637HF
+ W83667HG-B
+ W83687THF
+ NCT6775
+ NCT6776
+
This watchdog simply watches your kernel to make sure it doesn't
freeze, and if it does, it reboots your computer after a certain
amount of time.
diff --git a/drivers/watchdog/w83627hf_wdt.c b/drivers/watchdog/w83627hf_wdt.c
index 3a2ba30..b23f296 100644
--- a/drivers/watchdog/w83627hf_wdt.c
+++ b/drivers/watchdog/w83627hf_wdt.c
@@ -47,7 +47,7 @@
static int wdt_io;
enum chips { w83627hf, w83637hf, w83627thf, w83687thf, w83627ehf, w83627dhg,
- w83627uhg };
+ w83627uhg, w83667hg_b, nct6775, nct6776 };
/*
* Kernel methods.
@@ -67,6 +67,9 @@ enum chips { w83627hf, w83637hf, w83627thf, w83687thf, w83627ehf, w83627dhg,
#define W83627EHF_ID 0x88
#define W83627DHG_ID 0xa0
#define W83627UHG_ID 0xa2
+#define W83667HG_B_ID 0xb3
+#define NCT6775_ID 0xb4
+#define NCT6776_ID 0xc3
static void superio_outb(int reg, int val)
{
@@ -130,6 +133,18 @@ static void w83627hf_init(enum chips chip)
case w83637hf:
case w83687thf:
break;
+ case w83667hg_b:
+ case nct6775:
+ case nct6776:
+ /*
+ * These chips support more than one WDTO# output pin.
+ * Don't touch it, and hope the BIOS does the right thing.
+ */
+ t = superio_inb(0xF5);
+ t |= 0x02; /* enable the WDTO# output low pulse
+ * to the KBRST# pin */
+ superio_outb(0xF5, t);
+ break;
default:
break;
}
@@ -268,6 +283,15 @@ static int wdt_find(int addr)
case W83627UHG_ID:
ret = w83627uhg;
break;
+ case W83667HG_B_ID:
+ ret = w83667hg_b;
+ break;
+ case NCT6775_ID:
+ ret = nct6775;
+ break;
+ case NCT6776_ID:
+ ret = nct6776;
+ break;
case 0xff:
break;
default:
@@ -291,6 +315,9 @@ static int __init wdt_init(void)
"W83627EHF",
"W83627DHG",
"W83627UHG",
+ "W83667HG-B",
+ "NCT6775",
+ "NCT6776",
};
wdt_io = 0x2e;
--
1.7.9.7
--
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