[PATCH] ARM: dts: am437x-gp-evm: Add wakeup interrupt source for pixcir_i2c_ts
vigneshr at ti.com
Wed Oct 14 02:12:41 PDT 2015
On 10/14/2015 02:16 PM, Roger Quadros wrote:
> On 14/10/15 08:52, Vignesh R wrote:
>> On am437x-gp-evm, pixcir_i2c_ts can wakeup the system from lower power
>> state via pinctrl and IO daisy chain using generic wakeirq framework.
>> With commit 3fffd1283927 ("i2c: allow specifying separate wakeup
>> interrupt in device tree") i2c core allows optional wakeirq to be
>> specified via device tree. Add wakeup irq entry to enable pixcir_i2c_ts
>> to wake the system from low power state.
>> Signed-off-by: Vignesh R <vigneshr at ti.com>
>> arch/arm/boot/dts/am437x-gp-evm.dts | 5 +++++
>> 1 file changed, 5 insertions(+)
>> diff --git a/arch/arm/boot/dts/am437x-gp-evm.dts b/arch/arm/boot/dts/am437x-gp-evm.dts
>> index 22038f21f228..69e93af7df0d 100644
>> --- a/arch/arm/boot/dts/am437x-gp-evm.dts
>> +++ b/arch/arm/boot/dts/am437x-gp-evm.dts
>> @@ -581,8 +581,13 @@
>> attb-gpio = <&gpio3 22 GPIO_ACTIVE_HIGH>;
>> + interrupts-extended = <&gpio3 22 GPIO_ACTIVE_HIGH>,
>> + <&am43xx_pinmux 0x264>;
> How does this work?
> interrupts-extended property must have
> 1) interrupt parent
> 2) interrupt number
> 3) interrupt flags
> Your change doesn't seem to comply with those requirements.
AFAIU, interrupts-extended has two parts: interrupt parent phandle and
The number of cells in interrupt specifier is determined by
interrupt-cells property of interrupt parent node.
In above case, gpio3 has interrupt-cells = 2 hence interrupt specifier
has interrupt number and interrupt flag field.
But in case am43xx_pinmux node, interrupt-cells is 1 hence has no
interrupt flag field.
More information about the linux-arm-kernel