mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-09-06 19:07:52 +00:00
watchdog: add f71862fg support
Watchdog support for Fintek F71862fg Super-I/O added. Two different hardware reset pins of the F71862fg chip can be configured by an additional module parameter. Signed-off-by: Lutz Ballaschke <vegan.grindcore@googlemail.com> Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
This commit is contained in:
parent
f9a9f096d2
commit
7977ff6e3d
1 changed files with 41 additions and 4 deletions
|
@ -42,6 +42,7 @@
|
|||
#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_ROM_ADDR_SEL 0x27 /* ROM address 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 */
|
||||
|
@ -71,6 +72,8 @@
|
|||
#define WATCHDOG_MAX_TIMEOUT (60 * 255)
|
||||
#define WATCHDOG_PULSE_WIDTH 125 /* 125 ms, default pulse width for
|
||||
watchdog signal */
|
||||
#define WATCHDOG_F71862FG_PIN 63 /* default watchdog reset output
|
||||
pin number 63 */
|
||||
|
||||
static unsigned short force_id;
|
||||
module_param(force_id, ushort, 0);
|
||||
|
@ -90,6 +93,12 @@ MODULE_PARM_DESC(pulse_width,
|
|||
"Watchdog signal pulse width. 0(=level), 1 ms, 25 ms, 125 ms or 5000 ms"
|
||||
" (default=" __MODULE_STRING(WATCHDOG_PULSE_WIDTH) ")");
|
||||
|
||||
static unsigned int f71862fg_pin = WATCHDOG_F71862FG_PIN;
|
||||
module_param(f71862fg_pin, uint, 0);
|
||||
MODULE_PARM_DESC(f71862fg_pin,
|
||||
"Watchdog f71862fg reset output pin configuration. Choose pin 56 or 63"
|
||||
" (default=" __MODULE_STRING(WATCHDOG_F71862FG_PIN)")");
|
||||
|
||||
static int nowayout = WATCHDOG_NOWAYOUT;
|
||||
module_param(nowayout, bool, 0444);
|
||||
MODULE_PARM_DESC(nowayout, "Disable watchdog shutdown on close");
|
||||
|
@ -283,6 +292,28 @@ static int watchdog_keepalive(void)
|
|||
return err;
|
||||
}
|
||||
|
||||
static int f71862fg_pin_configure(unsigned short ioaddr)
|
||||
{
|
||||
/* When ioaddr is non-zero the calling function has to take care of
|
||||
mutex handling and superio preparation! */
|
||||
|
||||
if (f71862fg_pin == 63) {
|
||||
if (ioaddr) {
|
||||
/* SPI must be disabled first to use this pin! */
|
||||
superio_clear_bit(ioaddr, SIO_REG_ROM_ADDR_SEL, 6);
|
||||
superio_set_bit(ioaddr, SIO_REG_MFUNCT3, 4);
|
||||
}
|
||||
} else if (f71862fg_pin == 56) {
|
||||
if (ioaddr)
|
||||
superio_set_bit(ioaddr, SIO_REG_MFUNCT1, 1);
|
||||
} else {
|
||||
printk(KERN_ERR DRVNAME ": Invalid argument f71862fg_pin=%d\n",
|
||||
f71862fg_pin);
|
||||
return -EINVAL;
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int watchdog_start(void)
|
||||
{
|
||||
/* Make sure we don't die as soon as the watchdog is enabled below */
|
||||
|
@ -304,6 +335,12 @@ static int watchdog_start(void)
|
|||
superio_clear_bit(watchdog.sioaddr, SIO_REG_MFUNCT3, 3);
|
||||
break;
|
||||
|
||||
case f71862fg:
|
||||
err = f71862fg_pin_configure(watchdog.sioaddr);
|
||||
if (err)
|
||||
goto exit_superio;
|
||||
break;
|
||||
|
||||
case f71882fg:
|
||||
/* Set pin 56 to WDTRST# */
|
||||
superio_set_bit(watchdog.sioaddr, SIO_REG_MFUNCT1, 1);
|
||||
|
@ -712,16 +749,16 @@ static int __init f71808e_find(int sioaddr)
|
|||
case SIO_F71808_ID:
|
||||
watchdog.type = f71808fg;
|
||||
break;
|
||||
case SIO_F71862_ID:
|
||||
watchdog.type = f71862fg;
|
||||
err = f71862fg_pin_configure(0); /* validate module parameter */
|
||||
break;
|
||||
case SIO_F71882_ID:
|
||||
watchdog.type = f71882fg;
|
||||
break;
|
||||
case SIO_F71889_ID:
|
||||
watchdog.type = f71889fg;
|
||||
break;
|
||||
case SIO_F71862_ID:
|
||||
/* These have a watchdog, though it isn't implemented (yet). */
|
||||
err = -ENOSYS;
|
||||
goto exit;
|
||||
case SIO_F71858_ID:
|
||||
/* Confirmed (by datasheet) not to have a watchdog. */
|
||||
err = -ENODEV;
|
||||
|
|
Loading…
Reference in a new issue