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watchdog: f71808e_wdt: Add F81865 support 

Adds watchdog enable support for Fintek F81865 Super-IO chip to
Fintek wdt driver (f71808e_wdt)

Tested and verified on Lanner LEC-3030 Industrial PC

Datasheet references:
http://www.hardwaresecrets.com/datasheets/F81865_V028P.pdf
http://www.alldatasheet.com/datasheet-pdf/pdf/406317/FINTEK/F81865.html

Signed-off-by: Knud Poulsen <knpo@ieee.org>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
This commit is contained in:
Knud Poulsen 2016-04-25 12:28:51 +02:00 committed by Wim Van Sebroeck
parent 46856fabe4
commit ea0c03e80c
1 changed files with 21 additions and 3 deletions
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24
drivers/watchdog/f71808e_wdt.c
View File

@ -59,6 +59,7 @@
#define SIO_F71869A_ID 0x1007 /* Chipset ID */
#define SIO_F71882_ID 0x0541 /* Chipset ID */
#define SIO_F71889_ID 0x0723 /* Chipset ID */
#define SIO_F81865_ID 0x0704 /* Chipset ID */
#define F71808FG_REG_WDO_CONF 0xf0
#define F71808FG_REG_WDT_CONF 0xf5
@ -71,6 +72,9 @@
#define F71808FG_FLAG_WD_PULSE 4
#define F71808FG_FLAG_WD_UNIT 3
#define F81865_REG_WDO_CONF 0xfa
#define F81865_FLAG_WDOUT_EN 0
/* Default values */
#define WATCHDOG_TIMEOUT 60 /* 1 minute default timeout */
#define WATCHDOG_MAX_TIMEOUT (60 * 255)
@ -112,7 +116,7 @@ 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 };
enum chips { f71808fg, f71858fg, f71862fg, f71869, f71882fg, f71889fg, f81865 };
static const char *f71808e_names[] = {
"f71808fg",
@ -121,6 +125,7 @@ static const char *f71808e_names[] = {
"f71869",
"f71882fg",
"f71889fg",
"f81865",
};
/* Super-I/O Function prototypes */
@ -360,6 +365,11 @@ static int watchdog_start(void)
superio_inb(watchdog.sioaddr, SIO_REG_MFUNCT3) & 0xcf);
break;
case f81865:
/* Set pin 70 to WDTRST# */
superio_clear_bit(watchdog.sioaddr, SIO_REG_MFUNCT3, 5);
break;
default:
/*
* 'default' label to shut up the compiler and catch
@ -371,8 +381,13 @@ static int watchdog_start(void)
superio_select(watchdog.sioaddr, SIO_F71808FG_LD_WDT);
superio_set_bit(watchdog.sioaddr, SIO_REG_ENABLE, 0);
superio_set_bit(watchdog.sioaddr, F71808FG_REG_WDO_CONF,
F71808FG_FLAG_WDOUT_EN);
if (watchdog.type == f81865)
superio_set_bit(watchdog.sioaddr, F81865_REG_WDO_CONF,
F81865_FLAG_WDOUT_EN);
else
superio_set_bit(watchdog.sioaddr, F71808FG_REG_WDO_CONF,
F71808FG_FLAG_WDOUT_EN);
superio_set_bit(watchdog.sioaddr, F71808FG_REG_WDT_CONF,
F71808FG_FLAG_WD_EN);
@ -770,6 +785,9 @@ static int __init f71808e_find(int sioaddr)
/* Confirmed (by datasheet) not to have a watchdog. */
err = -ENODEV;
goto exit;
case SIO_F81865_ID:
watchdog.type = f81865;
break;
default:
pr_info("Unrecognized Fintek device: %04x\n",
(unsigned int)devid);