watchdog: f71808e_wdt: Add F81803 support

This adds watchdog support for the Fintek F81803 Super I/O chip.

Testing was done on the Seneca XK-QUAD.

Signed-off-by: Jaret Cantu <jaret.cantu@timesys.com>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Link: https://lore.kernel.org/r/20190912175550.9340-1-jaret.cantu@timesys.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/Kconfig b/drivers/watchdog/Kconfig
index d68e5b500aef9782519acec893026e7e742e72d9..58e7c100b6addf7fa8968de1e95c0dc5eee6058c 100644 (file)
--- a/drivers/watchdog/Kconfig
+++ b/drivers/watchdog/Kconfig
@@ -1043,8 +1043,8 @@ config F71808E_WDT
        depends on X86
        help
          This is the driver for the hardware watchdog on the Fintek F71808E,
-         F71862FG, F71868, F71869, F71882FG, F71889FG, F81865 and F81866
-         Super I/O controllers.
+         F71862FG, F71868, F71869, F71882FG, F71889FG, F81803, 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 ff5cf1b48a4dd96a84fd8a9c545fe6e0bd62a48d..e46104c2fd94ec98319afea4ceae025fda7241c0 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);
@@ -809,6 +821,9 @@ 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;