watchdog: f71808e_wdt: Add F81966 support

This adds watchdog support the Fintek F81966 Super I/O chip.
Testing was done on the Aaeon SSE-OPTI

Signed-off-by: AaeonIot <sophiehu@aaeon.com.tw>
Signed-off-by: Chia-Lin Kao (AceLan) <acelan.kao@canonical.com>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Link: https://lore.kernel.org/r/20211117024052.2427539-1-acelan.kao@canonical.com
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@linux-watchdog.org>

diff --git a/drivers/watchdog/f71808e_wdt.c b/drivers/watchdog/f71808e_wdt.c
index ee90c5f..7f59c68 100644 (file)
--- a/drivers/watchdog/f71808e_wdt.c
+++ b/drivers/watchdog/f71808e_wdt.c
@@ -49,6 +49,7 @@
 #define SIO_F81803_ID          0x1210  /* Chipset ID */
 #define SIO_F81865_ID          0x0704  /* Chipset ID */
 #define SIO_F81866_ID          0x1010  /* Chipset ID */
+#define SIO_F81966_ID          0x1502  /* F81804 chipset ID, same for f81966 */
 
 #define F71808FG_REG_WDO_CONF          0xf0
 #define F71808FG_REG_WDT_CONF          0xf5
@@ -105,7 +106,7 @@ 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, f71868, f71869, f71882fg, f71889fg,
-            f81803, f81865, f81866};
+            f81803, f81865, f81866, f81966};
 
 static const char * const fintek_wdt_names[] = {
        "f71808fg",
@@ -118,6 +119,7 @@ static const char * const fintek_wdt_names[] = {
        "f81803",
        "f81865",
        "f81866",
+       "f81966"
 };
 
 /* Super-I/O Function prototypes */
@@ -347,6 +349,7 @@ static int fintek_wdt_start(struct watchdog_device *wdd)
                break;
 
        case f81866:
+       case f81966:
                /*
                 * GPIO1 Control Register when 27h BIT3:2 = 01 & BIT0 = 0.
                 * The PIN 70(GPIO15/WDTRST) is controlled by 2Ch:
@@ -373,7 +376,7 @@ static int fintek_wdt_start(struct watchdog_device *wdd)
        superio_select(wd->sioaddr, SIO_F71808FG_LD_WDT);
        superio_set_bit(wd->sioaddr, SIO_REG_ENABLE, 0);
 
-       if (wd->type == f81865 || wd->type == f81866)
+       if (wd->type == f81865 || wd->type == f81866 || wd->type == f81966)
                superio_set_bit(wd->sioaddr, F81865_REG_WDO_CONF,
                                F81865_FLAG_WDOUT_EN);
        else
@@ -580,6 +583,9 @@ static int __init fintek_wdt_find(int sioaddr)
        case SIO_F81866_ID:
                type = f81866;
                break;
+       case SIO_F81966_ID:
+               type = f81966;
+               break;
        default:
                pr_info("Unrecognized Fintek device: %04x\n",
                        (unsigned int)devid);