shinys000114/linux
1
0
Fork 0
mirror of https://github.com/hardkernel/linux.git synced 2026-06-04 18:19:28 +09:00
Code Issues Packages Projects Releases Wiki Activity

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

Browse Source 
[ Upstream commit 9291c65b01 ]

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>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Hans de Goede
2018-01-01 13:23:57 +01:00
committed by Greg Kroah-Hartman
parent dd3e1a4e76
commit 5391891c0a
1 changed files with 6 additions and 0 deletions
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);