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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>
This commit is contained in:
Jaret Cantu 2019-09-12 13:55:50 -04:00 committed by Wim Van Sebroeck
parent 52a142140e
commit ca2fc5efff
2 changed files with 18 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
drivers/watchdog/Kconfig
View File

@ -1043,8 +1043,8 @@ config F71808E_WDT
depends on X86 depends on X86
help help
This is the driver for the hardware watchdog on the Fintek F71808E, This is the driver for the hardware watchdog on the Fintek F71808E,
F71862FG, F71868, F71869, F71882FG, F71889FG, F81865 and F81866 F71862FG, F71868, F71869, F71882FG, F71889FG, F81803, F81865, and
Super I/O controllers. F81866 Super I/O controllers.
You can compile this driver directly into the kernel, or use You can compile this driver directly into the kernel, or use
it as a module. The module will be called f71808e_wdt. it as a module. The module will be called f71808e_wdt.

17
drivers/watchdog/f71808e_wdt.c
View File

@ -31,8 +31,10 @@
#define SIO_REG_DEVID 0x20 /* Device ID (2 bytes) */ #define SIO_REG_DEVID 0x20 /* Device ID (2 bytes) */
#define SIO_REG_DEVREV 0x22 /* Device revision */ #define SIO_REG_DEVREV 0x22 /* Device revision */
#define SIO_REG_MANID 0x23 /* Fintek ID (2 bytes) */ #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_REG_ROM_ADDR_SEL 0x27 /* ROM address select */
#define SIO_F81866_REG_PORT_SEL 0x27 /* F81866 Multi-Function Register */ #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_MFUNCT1 0x29 /* Multi function select 1 */
#define SIO_REG_MFUNCT2 0x2a /* Multi function select 2 */ #define SIO_REG_MFUNCT2 0x2a /* Multi function select 2 */
#define SIO_REG_MFUNCT3 0x2b /* Multi function select 3 */ #define SIO_REG_MFUNCT3 0x2b /* Multi function select 3 */
@ -49,6 +51,7 @@
#define SIO_F71869A_ID 0x1007 /* Chipset ID */ #define SIO_F71869A_ID 0x1007 /* Chipset ID */
#define SIO_F71882_ID 0x0541 /* Chipset ID */ #define SIO_F71882_ID 0x0541 /* Chipset ID */
#define SIO_F71889_ID 0x0723 /* 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_F81865_ID 0x0704 /* Chipset ID */
#define SIO_F81866_ID 0x1010 /* 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."); " given initial timeout. Zero (default) disables this feature.");
enum chips { f71808fg, f71858fg, f71862fg, f71868, f71869, f71882fg, f71889fg, enum chips { f71808fg, f71858fg, f71862fg, f71868, f71869, f71882fg, f71889fg,
f81865, f81866}; f81803, f81865, f81866};
static const char *f71808e_names[] = { static const char *f71808e_names[] = {
"f71808fg", "f71808fg",
@ -118,6 +121,7 @@ static const char *f71808e_names[] = {
"f71869", "f71869",
"f71882fg", "f71882fg",
"f71889fg", "f71889fg",
"f81803",
"f81865", "f81865",
"f81866", "f81866",
}; };
@ -370,6 +374,14 @@ static int watchdog_start(void)
superio_inb(watchdog.sioaddr, SIO_REG_MFUNCT3) & 0xcf); superio_inb(watchdog.sioaddr, SIO_REG_MFUNCT3) & 0xcf);
break; 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: case f81865:
/* Set pin 70 to WDTRST# */ /* Set pin 70 to WDTRST# */
superio_clear_bit(watchdog.sioaddr, SIO_REG_MFUNCT3, 5); 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. */ /* Confirmed (by datasheet) not to have a watchdog. */
err = -ENODEV; err = -ENODEV;
goto exit; goto exit;
case SIO_F81803_ID:
watchdog.type = f81803;
break;
case SIO_F81865_ID: case SIO_F81865_ID:
watchdog.type = f81865; watchdog.type = f81865;
break; break;