watchdog: f71808e_wdt: clear watchdog timeout occurred flag

[mirror_ubuntu-focal-kernel.git] / drivers / watchdog / f71808e_wdt.c

diff --git a/drivers/watchdog/f71808e_wdt.c b/drivers/watchdog/f71808e_wdt.c
index ff5cf1b48a4dd96a84fd8a9c545fe6e0bd62a48d..893cef70c159911f834eeece64c8350590fa6176 100644 (file)
--- a/drivers/watchdog/f71808e_wdt.c
+++ b/drivers/watchdog/f71808e_wdt.c
@@ -31,8 +31,10 @@
 #define SIO_REG_DEVID          0x20    /* Device ID (2 bytes) */
 #define SIO_REG_DEVREV         0x22    /* Device revision */
 #define SIO_REG_MANID          0x23    /* Fintek ID (2 bytes) */
+#define SIO_REG_CLOCK_SEL      0x26    /* Clock select */
 #define SIO_REG_ROM_ADDR_SEL   0x27    /* ROM address select */
 #define SIO_F81866_REG_PORT_SEL        0x27    /* F81866 Multi-Function Register */
+#define SIO_REG_TSI_LEVEL_SEL  0x28    /* TSI Level select */
 #define SIO_REG_MFUNCT1                0x29    /* Multi function select 1 */
 #define SIO_REG_MFUNCT2                0x2a    /* Multi function select 2 */
 #define SIO_REG_MFUNCT3                0x2b    /* Multi function select 3 */
@@ -49,6 +51,7 @@
 #define SIO_F71869A_ID         0x1007  /* Chipset ID */
 #define SIO_F71882_ID          0x0541  /* Chipset ID */
 #define SIO_F71889_ID          0x0723  /* Chipset ID */
+#define SIO_F81803_ID          0x1210  /* Chipset ID */
 #define SIO_F81865_ID          0x0704  /* Chipset ID */
 #define SIO_F81866_ID          0x1010  /* Chipset ID */
 
@@ -108,7 +111,7 @@ 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,
-            f81865, f81866};
+            f81803, f81865, f81866};
 
 static const char *f71808e_names[] = {
        "f71808fg",
@@ -118,6 +121,7 @@ static const char *f71808e_names[] = {
        "f71869",
        "f71882fg",
        "f71889fg",
+       "f81803",
        "f81865",
        "f81866",
 };
@@ -370,6 +374,14 @@ static int watchdog_start(void)
                        superio_inb(watchdog.sioaddr, SIO_REG_MFUNCT3) & 0xcf);
                break;
 
+       case f81803:
+               /* Enable TSI Level register bank */
+               superio_clear_bit(watchdog.sioaddr, SIO_REG_CLOCK_SEL, 3);
+               /* Set pin 27 to WDTRST# */
+               superio_outb(watchdog.sioaddr, SIO_REG_TSI_LEVEL_SEL, 0x5f &
+                       superio_inb(watchdog.sioaddr, SIO_REG_TSI_LEVEL_SEL));
+               break;
+
        case f81865:
                /* Set pin 70 to WDTRST# */
                superio_clear_bit(watchdog.sioaddr, SIO_REG_MFUNCT3, 5);
@@ -677,9 +689,9 @@ static int __init watchdog_init(int sioaddr)
         * into the module have been registered yet.
         */
        watchdog.sioaddr = sioaddr;
-       watchdog.ident.options = WDIOC_SETTIMEOUT
-                               | WDIOF_MAGICCLOSE
-                               | WDIOF_KEEPALIVEPING;
+       watchdog.ident.options = WDIOF_MAGICCLOSE
+                               | WDIOF_KEEPALIVEPING
+                               | WDIOF_CARDRESET;
 
        snprintf(watchdog.ident.identity,
                sizeof(watchdog.ident.identity), "%s watchdog",
@@ -693,6 +705,13 @@ static int __init watchdog_init(int sioaddr)
        wdt_conf = superio_inb(sioaddr, F71808FG_REG_WDT_CONF);
        watchdog.caused_reboot = wdt_conf & BIT(F71808FG_FLAG_WDTMOUT_STS);
 
+       /*
+        * We don't want WDTMOUT_STS to stick around till regular reboot.
+        * Write 1 to the bit to clear it to zero.
+        */
+       superio_outb(sioaddr, F71808FG_REG_WDT_CONF,
+                    wdt_conf | BIT(F71808FG_FLAG_WDTMOUT_STS));
+
        superio_exit(sioaddr);
 
        err = watchdog_set_timeout(timeout);
@@ -809,6 +828,9 @@ static int __init f71808e_find(int sioaddr)
                /* Confirmed (by datasheet) not to have a watchdog. */
                err = -ENODEV;
                goto exit;
+       case SIO_F81803_ID:
+               watchdog.type = f81803;
+               break;
        case SIO_F81865_ID:
                watchdog.type = f81865;
                break;