Patch "mfd: cpcap: Fix interrupt to use level interrupt" has been added to the 4.11-stable tree

This is a note to let you know that I've just added the patch titled

mfd: cpcap: Fix interrupt to use level interrupt

to the 4.11-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
mfd-cpcap-fix-interrupt-to-use-level-interrupt.patch
and it can be found in the queue-4.11 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let <[email protected]> know about it.

From: Tony Lindgren <[email protected]>
Date: Mon, 3 Apr 2017 20:15:54 -0700
Subject: mfd: cpcap: Fix interrupt to use level interrupt

From: Tony Lindgren <[email protected]>

commit ac89473213c602b98172d92e40f5e78032b1aba0 upstream.

I made a mistake assuming the device tree configuration for interrupt triggering was somehow passed to the SPI device but it's not.

In the Motorola Linux kernel tree CPCAP PMIC is configured as a rising edge triggered interrupt, but then then it's interrupt handler keeps looping until the GPIO line goes down. So the CPCAP interrupt is clearly a level interrupt and not an edge interrupt.

Earlier when I tried to configure it as level interrupt using the device tree, I did not account that the triggering only gets passed to the SPI core and it also needs to be specified in the CPCAP driver when we do devm_regmap_add_irq_chip().

---
 drivers/mfd/motorola-cpcap.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

@@ -126,7 +126,7 @@ static int cpcap_init_irq_chip(struct cp
 
 	ret = devm_regmap_add_irq_chip(&cpcap->spi->dev, cpcap->regmap,
 				       cpcap->spi->irq,
-				       IRQF_TRIGGER_RISING |
+				       irq_get_trigger_type(cpcap->spi->irq) |
 				       IRQF_SHARED, -1,
 				       chip, &cpcap->irqdata[irq_chip]);
 	if (ret) {

Patches currently in stable-queue which might be from [email protected] are

queue-4.11/mfd-cpcap-fix-bad-use-of-irq-sense-register.patch queue-4.11/mfd-omap-usb-tll-fix-inverted-bit-use-for-usb-tll-mode.patch queue-4.11/mfd-cpcap-fix-interrupt-to-use-level-interrupt.patch queue-4.11/mfd-cpcap-use-ack_invert-interrupts.patch