mirrors/linux-stable
1
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git synced 2024-08-27 19:29:37 +00:00
Code Issues Releases Wiki Activity

pinctrl: baytrail: Enable glitch filter for GPIOs used as interrupts

Browse source 
On some systems, some PCB traces attached to GpioInts are routed in such
a way that they pick up enough interference to constantly (many times per
second) trigger.

Enabling glitch-filtering fixes this.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This commit is contained in:
Hans de Goede 2018-01-01 13:23:57 +01:00 committed by Linus Walleij
parent 659e7142bd
commit 9291c65b01
1 changed files with 6 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

6
drivers/pinctrl/intel/pinctrl-baytrail.c
View file

@ -46,6 +46,9 @@
#define BYT_TRIG_POS BIT(25)
#define BYT_TRIG_LVL BIT(24)
#define BYT_DEBOUNCE_EN BIT(20)
#define BYT_GLITCH_FILTER_EN BIT(19)
#define BYT_GLITCH_F_SLOW_CLK BIT(17)
#define BYT_GLITCH_F_FAST_CLK BIT(16)
#define BYT_PULL_STR_SHIFT 9
#define BYT_PULL_STR_MASK (3 << BYT_PULL_STR_SHIFT)
#define BYT_PULL_STR_2K (0 << BYT_PULL_STR_SHIFT)
@ -1579,6 +1582,9 @@ static int byt_irq_type(struct irq_data *d, unsigned int type)
*/
value &= ~(BYT_DIRECT_IRQ_EN | BYT_TRIG_POS | BYT_TRIG_NEG |
BYT_TRIG_LVL);
/* Enable glitch filtering */
value |= BYT_GLITCH_FILTER_EN | BYT_GLITCH_F_SLOW_CLK |
BYT_GLITCH_F_FAST_CLK;
writel(value, reg);