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@maciej.szmigiero.name>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>

diff --git a/drivers/watchdog/Kconfig b/drivers/watchdog/Kconfig
index 124e9b87ab6bd004446764fd7e1bcc62a7c54a50..2696493c808b6d691250ae11c6392bf64708ad57 100644 (file)
--- a/drivers/watchdog/Kconfig
+++ b/drivers/watchdog/Kconfig
@@ -849,11 +849,12 @@ 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 1b7e9169072f21b99335a97fa219d30eaa903393..8658dba2176816ed02d408081dfdca7e8b41bd99 100644 (file)
--- 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;