This is a note to let you know that I've just added the patch titled
pinctrl: baytrail: Enable glitch filter for GPIOs used as interrupts
to the 4.15-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git%3Ba=su...
The filename of the patch is: pinctrl-baytrail-enable-glitch-filter-for-gpios-used-as-interrupts.patch and it can be found in the queue-4.15 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree, please let stable@vger.kernel.org know about it.
From foo@baz Mon Apr 9 10:16:32 CEST 2018
From: Hans de Goede hdegoede@redhat.com Date: Mon, 1 Jan 2018 13:23:57 +0100 Subject: pinctrl: baytrail: Enable glitch filter for GPIOs used as interrupts
From: Hans de Goede hdegoede@redhat.com
[ Upstream commit 9291c65b01d1c67ebd56644cb19317ad665c44b3 ]
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 --- drivers/pinctrl/intel/pinctrl-baytrail.c | 6 ++++++ 1 file changed, 6 insertions(+)
--- a/drivers/pinctrl/intel/pinctrl-baytrail.c +++ b/drivers/pinctrl/intel/pinctrl-baytrail.c @@ -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 */ 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);
Patches currently in stable-queue which might be from hdegoede@redhat.com are
queue-4.15/serdev-fix-serdev_uevent-failure-on-acpi-enumerated-serdev-controllers.patch queue-4.15/acpi-video-default-lcd_only-to-true-on-win8-ready-and-newer-machines.patch queue-4.15/bluetooth-hci_bcm-mandate-presence-of-shutdown-and-device-wake-gpio.patch queue-4.15/input-goodix-disable-irqs-while-suspended.patch queue-4.15/asoc-intel-cht_bsw_rt5645-analog-mic-support.patch queue-4.15/power-supply-axp288_charger-properly-stop-work-on-probe-error-remove.patch queue-4.15/pinctrl-baytrail-enable-glitch-filter-for-gpios-used-as-interrupts.patch