Re: [PATCH v2 1/1] Input: gpio_keys - add device tree support for interrupt only keys
From: Laxman Dewangan <ldewangan@nvidia.com>
Date: 2014-11-13 11:02:59
Also in:
linux-devicetree, linux-gpio
On Thursday 13 November 2014 04:30 PM, Arnd Bergmann wrote:
On Thursday 13 November 2014 11:52:48 Alexander Stein wrote:quoted
On Thursday 13 November 2014 11:47:13, Arnd Bergmann wrote:quoted
Regarding your initial use case of testing interrupt polarity, would you have been able to do the same thing by looking at the interrupt count in /proc/interrupts?This is only possible if some driver actually requests this interrupt, no?Yes, I think that is correct, at least with sparseirq, which is now the default. For interrupts that are mapped by the irqchip, you can look up the number of spurious interrupts in /proc/irq/<nr>/spurious.
yes, I came across multiple PMIC(TPS65910, MAXIM, Ricoh) module which generates interrupt when their On-key pin get toggle. Key is connected with this pin of PMIC and for on-key driver, we are using the gpio-keys driver by passing interrupt number instead of complete new driver.