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[1/2] devicetree: i2c-hid: Add regulator support

Message ID 1480717140-14558-1-git-send-email-briannorris@chromium.org (mailing list archive)
State New, archived
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Commit Message

Brian Norris Dec. 2, 2016, 10:18 p.m. UTC
From: Caesar Wang <wxt@rock-chips.com>

Document a "vdd-supply" and an initialization delay. Can be used for
powering on/off a HID.

Signed-off-by: Caesar Wang <wxt@rock-chips.com>
Cc: Rob Herring <robh+dt@kernel.org>
Cc: Jiri Kosina <jikos@kernel.org>
Cc: linux-input@vger.kernel.org
Signed-off-by: Brian Norris <briannorris@chromium.org>
---
v2:
 * add compatible property for wacom, per Rob's request
 * name the regulator property specifically (VDD)

v3:
 * remove wacom property, per Benjamin's request
 * add delay property

v4: no change
---
 Documentation/devicetree/bindings/input/hid-over-i2c.txt | 5 +++++
 1 file changed, 5 insertions(+)

Comments

Benjamin Tissoires Dec. 5, 2016, 9:08 a.m. UTC | #1
On Dec 02 2016 or thereabouts, Brian Norris wrote:
> From: Caesar Wang <wxt@rock-chips.com>
> 
> Document a "vdd-supply" and an initialization delay. Can be used for
> powering on/off a HID.
> 
> Signed-off-by: Caesar Wang <wxt@rock-chips.com>
> Cc: Rob Herring <robh+dt@kernel.org>
> Cc: Jiri Kosina <jikos@kernel.org>
> Cc: linux-input@vger.kernel.org
> Signed-off-by: Brian Norris <briannorris@chromium.org>
> ---
> v2:
>  * add compatible property for wacom, per Rob's request
>  * name the regulator property specifically (VDD)
> 
> v3:
>  * remove wacom property, per Benjamin's request
>  * add delay property
> 
> v4: no change
> ---
>  Documentation/devicetree/bindings/input/hid-over-i2c.txt | 5 +++++
>  1 file changed, 5 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/input/hid-over-i2c.txt b/Documentation/devicetree/bindings/input/hid-over-i2c.txt
> index 488edcb264c4..1ea290167652 100644
> --- a/Documentation/devicetree/bindings/input/hid-over-i2c.txt
> +++ b/Documentation/devicetree/bindings/input/hid-over-i2c.txt
> @@ -17,6 +17,11 @@ Required properties:
>  - interrupt-parent: the phandle for the interrupt controller
>  - interrupts: interrupt line
>  
> +Optional properties:
> +- vdd-supply: phandle of the regulator that provides the supply voltage.
> +- init-delay-ms: time required by the device after power-on before it is ready
> +  for communication.

Nitpick: maybe we should say that the power-on applies to the vdd-supply
parameter, not the SET_POWER HID command. I am just worried people will
misuse this parameter.

Otherwise, Acked-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>

> +
>  Example:
>  
>  	i2c-hid-dev@2c {
> -- 
> 2.8.0.rc3.226.g39d4020
> 
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Jiri Kosina Dec. 9, 2016, 12:17 p.m. UTC | #2
On Fri, 2 Dec 2016, Brian Norris wrote:

> From: Caesar Wang <wxt@rock-chips.com>
> 
> Document a "vdd-supply" and an initialization delay. Can be used for
> powering on/off a HID.
> 
> Signed-off-by: Caesar Wang <wxt@rock-chips.com>
> Cc: Rob Herring <robh+dt@kernel.org>
> Cc: Jiri Kosina <jikos@kernel.org>
> Cc: linux-input@vger.kernel.org
> Signed-off-by: Brian Norris <briannorris@chromium.org>
> ---
> v2:
>  * add compatible property for wacom, per Rob's request
>  * name the regulator property specifically (VDD)
> 
> v3:
>  * remove wacom property, per Benjamin's request
>  * add delay property
> 
> v4: no change

Applied both patches to for-4.10/i2c-hid.

Thanks,
Rob Herring Dec. 9, 2016, 2:23 p.m. UTC | #3
On Fri, Dec 9, 2016 at 6:17 AM, Jiri Kosina <jikos@kernel.org> wrote:
> On Fri, 2 Dec 2016, Brian Norris wrote:
>
>> From: Caesar Wang <wxt@rock-chips.com>
>>
>> Document a "vdd-supply" and an initialization delay. Can be used for
>> powering on/off a HID.
>>
>> Signed-off-by: Caesar Wang <wxt@rock-chips.com>
>> Cc: Rob Herring <robh+dt@kernel.org>
>> Cc: Jiri Kosina <jikos@kernel.org>
>> Cc: linux-input@vger.kernel.org
>> Signed-off-by: Brian Norris <briannorris@chromium.org>
>> ---
>> v2:
>>  * add compatible property for wacom, per Rob's request
>>  * name the regulator property specifically (VDD)
>>
>> v3:
>>  * remove wacom property, per Benjamin's request
>>  * add delay property
>>
>> v4: no change
>
> Applied both patches to for-4.10/i2c-hid.

In case it wasn't clear: NAK

This is still under discussion[1].

Rob

[1] https://lkml.org/lkml/2016/12/8/362
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diff mbox

Patch

diff --git a/Documentation/devicetree/bindings/input/hid-over-i2c.txt b/Documentation/devicetree/bindings/input/hid-over-i2c.txt
index 488edcb264c4..1ea290167652 100644
--- a/Documentation/devicetree/bindings/input/hid-over-i2c.txt
+++ b/Documentation/devicetree/bindings/input/hid-over-i2c.txt
@@ -17,6 +17,11 @@  Required properties:
 - interrupt-parent: the phandle for the interrupt controller
 - interrupts: interrupt line
 
+Optional properties:
+- vdd-supply: phandle of the regulator that provides the supply voltage.
+- init-delay-ms: time required by the device after power-on before it is ready
+  for communication.
+
 Example:
 
 	i2c-hid-dev@2c {