On Tue, Oct 15, 2024 at 04:41:13PM +0300, Abel Vesa wrote:
> On 24-10-15 14:24:27, Johan Hovold wrote:
> > Add the missing HID supplies to avoid relying on other consumers to keep
> > them on.
> >
> > This also avoids the following warnings on boot:
> >
> > i2c_hid_of 0-0010: supply vdd not found, using dummy regulator
> > i2c_hid_of 0-0010: supply vddl not found, using dummy regulator
> > i2c_hid_of 1-0015: supply vdd not found, using dummy regulator
> > i2c_hid_of 1-0015: supply vddl not found, using dummy regulator
> > i2c_hid_of 1-003a: supply vdd not found, using dummy regulator
> > i2c_hid_of 1-003a: supply vddl not found, using dummy regulator
> >
> > Note that VREG_MISC_3P3 is also used for things like the fingerprint
> > reader which are not yet fully described so mark the regulator as always
> > on for now.
> >
> > Fixes: d7e03cce0400 ("arm64: dts: qcom: x1e80100-crd: Enable more support")
> > Cc: Abel Vesa <abel.vesa@xxxxxxxxxx>
> > Signed-off-by: Johan Hovold <johan+linaro@xxxxxxxxxx>
> > ---
> > arch/arm64/boot/dts/qcom/x1e80100-crd.dts | 34 +++++++++++++++++++++++
> > 1 file changed, 34 insertions(+)
> >
> > diff --git a/arch/arm64/boot/dts/qcom/x1e80100-crd.dts b/arch/arm64/boot/dts/qcom/x1e80100-crd.dts
> > index 10b28d870f08..4ab7078f76e0 100644
> > --- a/arch/arm64/boot/dts/qcom/x1e80100-crd.dts
> > +++ b/arch/arm64/boot/dts/qcom/x1e80100-crd.dts
> > @@ -288,6 +288,23 @@ vreg_edp_3p3: regulator-edp-3p3 {
> > regulator-boot-on;
> > };
> >
>
> [...]
>
> >
> > +&pm8550ve_8_gpios {
> > + misc_3p3_reg_en: misc-3p3-reg-en-state {
> > + pins = "gpio6";
> > + function = "normal";
> > + bias-disable;
>
> Maybe output-enable and input-disable are needed. Can you please check?
>
FWIW, there is a reason behind explicitly describing the intended
direction of the pin for PMIC GPIOs with properties like "output-enable"
or "input-disable": On QC platforms, PMIC GPIOs can be either in "input"
mode, "output" mode, or "input+output" mode. If you don't specify
exactly what you want, then the pinctrl-spmi-gpio driver will only add
to the existing configuration.
For the configuration above this means:
1. If GPIO6 is disabled or in "output" mode during boot, the resulting
mode will be "output".
2. If GPIO6 is in "input" mode during boot, the resulting mode will be
"input+output".
I don't know if "input+output" mode has any negative impact compared to
pure "output" mode. We usually want to have the pins in a consistent
state though (i.e. independent of the boot up state).
Thanks,
Stephan
