lkml.org 
[lkml]   [2018]   [Sep]   [25]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH 1/3] dt-bindings: pwm: msm-vibrator: new bindings for MSM vibrator driver
Hi Rob,

On Mon, Sep 24, 2018 at 03:01:11PM -0700, Rob Herring wrote:
> On Wed, Sep 19, 2018 at 11:09:10AM -0400, Brian Masney wrote:
> > This patch adds the device tree bindings for the pwm-msm-vibrator.c
> > driver that supports the vibrator found on various Qualcomm MSM SOCs.
>
> Bindings are for h/w, not some driver.

OK, I will fix this and the other references in v2.

> > +Required properties:
> > +
> > + - compatible: Should be one of
> > + "qcom,msm8226-pwm-vibrator"
> > + "qcom,msm8974-pwm-vibrator"
>
> The block only works for a vibrator?

Yes.

I cannot find a publicly-available datasheet for the MSM8974 to see if
there are other uses for this particular PWM available. The only thing
that I have to work with right now is the downstream Android sources at
https://android.googlesource.com/kernel/msm/+/android-msm-lenok-3.10-lollipop-wear-release/drivers/misc/msm_pwm_vibrator.c.

> > + - reg: the base address and length of the IO memory for the registers.
> > + - #pwm-cells: set to 3.
> > + - pinctrl-names: set to default.
> > + - pinctrl-0: phandles pointing to pin configuration nodes. See
> > + Documentation/devicetree/bindings/pinctrl/pinctrl-bindings.txt
> > + - clock-names: set to pwm
> > + - clocks: phandle of the clock used by the PWM module. See
> > + Documentation/devicetree/bindings/clock/clock-bindings.txt
> > + - enable-gpios: GPIO that enables the vibrator.
>
> Shouldn't this go in the vibrator node as it is connected to the
> vibrator.

This should be labeled "GPIO that enables the PWM".

Brian


> > +
> > +Optional properties:
> > +
> > + - vcc-supply: phandle to the regulator that provides power to the sensor.
> > +
> > +Example from a LG Nexus 5 (hammerhead) phone:
> > +
> > +msm_pwm_vibrator_enable: msm_pwm_vibrator@fd8c3450 {
>
> pwm@...
>
> > + reg = <0xfd8c3450 0x400>;
> > + compatible = "qcom,msm8974-pwm-vibrator";
> > + #pwm-cells = <3>;
> > +
> > + vcc-supply = <&pm8941_l19>;
> > +
> > + clocks = <&mmcc CAMSS_GP1_CLK>;
> > + clock-names = "pwm";
> > +
> > + enable-gpios = <&msmgpio 60 GPIO_ACTIVE_HIGH>;
> > +
> > + pinctrl-names = "default";
> > + pinctrl-0 = <&vibrator_pin>;
> > +};
> > --
> > 2.17.1
> >

\
 
 \ /
  Last update: 2018-09-25 22:40    [W:0.044 / U:3.680 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site