On 3/21/19 8:36 PM, Ji-Ze Hong (Peter Hong) wrote:
Fix error bit operation in watchdog_start()
Hmm ... does that mean it never worked ? Did you test it this time ?
A secondary concern is that the watchdog doesn't _have_ to trigger WDTRST, but may also trigger PWOK. But that may be a separate issue.
Please add:
Fixes: 14b24a88a3660 ("watchdog: f71808e_wdt: Add F81866 support")
Signed-off-by: Ji-Ze Hong (Peter Hong) hpeter+linux_kernel@gmail.com
drivers/watchdog/f71808e_wdt.c | 11 +++++------ 1 file changed, 5 insertions(+), 6 deletions(-)
diff --git a/drivers/watchdog/f71808e_wdt.c b/drivers/watchdog/f71808e_wdt.c index 9a1c761258ce..9129485732c7 100644 --- a/drivers/watchdog/f71808e_wdt.c +++ b/drivers/watchdog/f71808e_wdt.c @@ -387,18 +387,17 @@ static int watchdog_start(void) case f81866: /* Set pin 70 to WDTRST# */
superio_clear_bit(watchdog.sioaddr, SIO_F81866_REG_PORT_SEL,BIT(3) | BIT(0));superio_set_bit(watchdog.sioaddr, SIO_F81866_REG_PORT_SEL,BIT(2));
superio_clear_bit(watchdog.sioaddr, SIO_F81866_REG_PORT_SEL, 3);superio_clear_bit(watchdog.sioaddr, SIO_F81866_REG_PORT_SEL, 0);superio_set_bit(watchdog.sioaddr, SIO_F81866_REG_PORT_SEL, 2);
Better use superio_inb()/superio_outb(). The above is (much) more expensive, and we have no real idea what the impact of changing one bit at a time may be.
Thanks, Guenter
- /*
*/
- GPIO1 Control Register when 27h BIT3:2 = 01 & BIT0 = 0.
- The PIN 70(GPIO15/WDTRST) is controlled by 2Ch:
BIT5: 0 -> WDTRST#1 -> GPIO15
superio_clear_bit(watchdog.sioaddr, SIO_F81866_REG_GPIO1,BIT(5));
superio_clear_bit(watchdog.sioaddr, SIO_F81866_REG_GPIO1, 5);default: