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Message-ID: <4931c8df-3068-ca2c-fb6b-4d5eed3faf06@maciej.szmigiero.name>
Date: Mon, 17 Apr 2017 22:37:05 +0200
From: "Maciej S. Szmigiero" <mail@...iej.szmigiero.name>
To: Wim Van Sebroeck <wim@...ana.be>,
Guenter Roeck <linux@...ck-us.net>
Cc: linux-watchdog@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH] watchdog: f71808e_wdt: Add F71868 support
This adds support for watchdog part of Fintek F71868 Super I/O chip to
f71808e_wdt driver.
The F71868 chip is, in general, very similar to a F71869, however it has
slightly different set of available reset pulse widths.
Tested on MSI A55M-P33 motherboard.
Signed-off-by: Maciej S. Szmigiero <mail@...iej.szmigiero.name>
---
drivers/watchdog/Kconfig | 7 ++++---
drivers/watchdog/f71808e_wdt.c | 27 ++++++++++++++++++++-------
2 files changed, 24 insertions(+), 10 deletions(-)
diff --git a/drivers/watchdog/Kconfig b/drivers/watchdog/Kconfig
index 8b9049dac094..1f23079537ad 100644
--- a/drivers/watchdog/Kconfig
+++ b/drivers/watchdog/Kconfig
@@ -829,11 +829,12 @@ config EBC_C384_WDT
the timeout module parameter.
config F71808E_WDT
- tristate "Fintek F71808E, F71862FG, F71869, F71882FG and F71889FG Watchdog"
+ tristate "Fintek F718xx, F818xx Super I/O Watchdog"
depends on X86
help
- This is the driver for the hardware watchdog on the Fintek
- F71808E, F71862FG, F71869, F71882FG and F71889FG Super I/O controllers.
+ This is the driver for the hardware watchdog on the Fintek F71808E,
+ F71862FG, F71868, F71869, F71882FG, F71889FG, F81865 and F81866
+ Super I/O controllers.
You can compile this driver directly into the kernel, or use
it as a module. The module will be called f71808e_wdt.
diff --git a/drivers/watchdog/f71808e_wdt.c b/drivers/watchdog/f71808e_wdt.c
index 1b7e9169072f..8658dba21768 100644
--- a/drivers/watchdog/f71808e_wdt.c
+++ b/drivers/watchdog/f71808e_wdt.c
@@ -57,6 +57,7 @@
#define SIO_F71808_ID 0x0901 /* Chipset ID */
#define SIO_F71858_ID 0x0507 /* Chipset ID */
#define SIO_F71862_ID 0x0601 /* Chipset ID */
+#define SIO_F71868_ID 0x1106 /* Chipset ID */
#define SIO_F71869_ID 0x0814 /* Chipset ID */
#define SIO_F71869A_ID 0x1007 /* Chipset ID */
#define SIO_F71882_ID 0x0541 /* Chipset ID */
@@ -101,7 +102,7 @@ MODULE_PARM_DESC(timeout,
static unsigned int pulse_width = WATCHDOG_PULSE_WIDTH;
module_param(pulse_width, uint, 0);
MODULE_PARM_DESC(pulse_width,
- "Watchdog signal pulse width. 0(=level), 1 ms, 25 ms, 125 ms or 5000 ms"
+ "Watchdog signal pulse width. 0(=level), 1, 25, 30, 125, 150, 5000 or 6000 ms"
" (default=" __MODULE_STRING(WATCHDOG_PULSE_WIDTH) ")");
static unsigned int f71862fg_pin = WATCHDOG_F71862FG_PIN;
@@ -119,13 +120,14 @@ module_param(start_withtimeout, uint, 0);
MODULE_PARM_DESC(start_withtimeout, "Start watchdog timer on module load with"
" given initial timeout. Zero (default) disables this feature.");
-enum chips { f71808fg, f71858fg, f71862fg, f71869, f71882fg, f71889fg, f81865,
- f81866};
+enum chips { f71808fg, f71858fg, f71862fg, f71868, f71869, f71882fg, f71889fg,
+ f81865, f81866};
static const char *f71808e_names[] = {
"f71808fg",
"f71858fg",
"f71862fg",
+ "f71868",
"f71869",
"f71882fg",
"f71889fg",
@@ -252,16 +254,23 @@ static int watchdog_set_timeout(int timeout)
static int watchdog_set_pulse_width(unsigned int pw)
{
int err = 0;
+ unsigned int t1 = 25, t2 = 125, t3 = 5000;
+
+ if (watchdog.type == f71868) {
+ t1 = 30;
+ t2 = 150;
+ t3 = 6000;
+ }
mutex_lock(&watchdog.lock);
- if (pw <= 1) {
+ if (pw <= 1) {
watchdog.pulse_val = 0;
- } else if (pw <= 25) {
+ } else if (pw <= t1) {
watchdog.pulse_val = 1;
- } else if (pw <= 125) {
+ } else if (pw <= t2) {
watchdog.pulse_val = 2;
- } else if (pw <= 5000) {
+ } else if (pw <= t3) {
watchdog.pulse_val = 3;
} else {
pr_err("pulse width out of range\n");
@@ -354,6 +363,7 @@ static int watchdog_start(void)
goto exit_superio;
break;
+ case f71868:
case f71869:
/* GPIO14 --> WDTRST# */
superio_clear_bit(watchdog.sioaddr, SIO_REG_MFUNCT1, 4);
@@ -792,6 +802,9 @@ static int __init f71808e_find(int sioaddr)
watchdog.type = f71862fg;
err = f71862fg_pin_configure(0); /* validate module parameter */
break;
+ case SIO_F71868_ID:
+ watchdog.type = f71868;
+ break;
case SIO_F71869_ID:
case SIO_F71869A_ID:
watchdog.type = f71869;
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