From: Coiby Xu Date: Thu, 5 Nov 2020 23:19:10 +0000 (+0800) Subject: pinctrl: amd: use higher precision for 512 RtcClk X-Git-Tag: v4.4.244~26 X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=9ba5d0977edd3f2acc1f7ead6bf6346d44cf39f5;p=thirdparty%2Fkernel%2Fstable.git pinctrl: amd: use higher precision for 512 RtcClk commit c64a6a0d4a928c63e5bc3b485552a8903a506c36 upstream. RTC is 32.768kHz thus 512 RtcClk equals 15625 usec. The documentation likely has dropped precision and that's why the driver mistakenly took the slightly deviated value. Cc: stable@vger.kernel.org Reported-by: Andy Shevchenko Suggested-by: Andy Shevchenko Suggested-by: Hans de Goede Signed-off-by: Coiby Xu Reviewed-by: Andy Shevchenko Reviewed-by: Hans de Goede Link: https://lore.kernel.org/linux-gpio/2f4706a1-502f-75f0-9596-cc25b4933b6c@redhat.com/ Link: https://lore.kernel.org/r/20201105231912.69527-3-coiby.xu@gmail.com Signed-off-by: Linus Walleij Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/pinctrl/pinctrl-amd.c b/drivers/pinctrl/pinctrl-amd.c index 7340ff78839a3..3ebc41baa3500 100644 --- a/drivers/pinctrl/pinctrl-amd.c +++ b/drivers/pinctrl/pinctrl-amd.c @@ -144,7 +144,7 @@ static int amd_gpio_set_debounce(struct gpio_chip *gc, unsigned offset, pin_reg |= BIT(DB_TMR_OUT_UNIT_OFF); pin_reg &= ~BIT(DB_TMR_LARGE_OFF); } else if (debounce < 250000) { - time = debounce / 15600; + time = debounce / 15625; pin_reg |= time & DB_TMR_OUT_MASK; pin_reg &= ~BIT(DB_TMR_OUT_UNIT_OFF); pin_reg |= BIT(DB_TMR_LARGE_OFF);