linux-kernel - Re: [PATCH v1] arm64: dts: imx8mm-verdin: add TPM device

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Date: Thu, 27 Jun 2024 10:25:52 +0100
From: Vitor Soares <ivitro@...il.com>
To: Francesco Dolcini <francesco@...cini.it>, Shawn Guo <shawnguo2@...h.net>
Cc: Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>,
  Conor Dooley <conor+dt@...nel.org>, Shawn Guo <shawnguo@...nel.org>,
 Sascha Hauer <s.hauer@...gutronix.de>,  Pengutronix Kernel Team
 <kernel@...gutronix.de>, Fabio Estevam <festevam@...il.com>, Vitor Soares
 <vitor.soares@...adex.com>, devicetree@...r.kernel.org,
 imx@...ts.linux.dev,  linux-arm-kernel@...ts.infradead.org,
 linux-kernel@...r.kernel.org
Subject: Re: [PATCH v1] arm64: dts: imx8mm-verdin: add TPM device

On Thu, 2024-06-27 at 09:10 +0200, Francesco Dolcini wrote:
> On Thu, Jun 27, 2024 at 02:57:48PM +0800, Shawn Guo wrote:
> > On Mon, Jun 17, 2024 at 09:18:42AM +0200, Francesco Dolcini wrote:
> > > Hello Shawn,
> > > 
> > > On Mon, Jun 17, 2024 at 10:33:50AM +0800, Shawn Guo wrote:
> > > > On Thu, Jun 13, 2024 at 02:41:50PM +0100, Vitor Soares wrote:
> > > > > From: Vitor Soares <vitor.soares@...adex.com>
> > > > > 
> > > > > Add TPM device found on Verdin iMX8M Mini PID4 0090 variant.
> > > > > 
> > > > > Signed-off-by: Vitor Soares <vitor.soares@...adex.com>
> > > > > ---
> > > > >  arch/arm64/boot/dts/freescale/imx8mm-verdin.dtsi | 16 +++++++++++----
> > > > > -
> > > > >  1 file changed, 11 insertions(+), 5 deletions(-)
> > > > > 
> > > > > diff --git a/arch/arm64/boot/dts/freescale/imx8mm-verdin.dtsi
> > > > > b/arch/arm64/boot/dts/freescale/imx8mm-verdin.dtsi
> > > > > index 4768b05fd765..c9ae5f0bb526 100644
> > > > > --- a/arch/arm64/boot/dts/freescale/imx8mm-verdin.dtsi
> > > > > +++ b/arch/arm64/boot/dts/freescale/imx8mm-verdin.dtsi
> > > > > @@ -227,15 +227,16 @@ &ecspi2 {
> > > > >         pinctrl-0 = <&pinctrl_ecspi2>;
> > > > >  };
> > > > >  
> > > > > -/* Verdin CAN_1 (On-module) */
> > > > > +/* On-module SPI */
> > > > >  &ecspi3 {
> > > > >         #address-cells = <1>;
> > > > >         #size-cells = <0>;
> > > > > -       cs-gpios = <&gpio5 25 GPIO_ACTIVE_LOW>;
> > > > > +       cs-gpios = <&gpio5 25 GPIO_ACTIVE_LOW>, <&gpio4 19
> > > > > GPIO_ACTIVE_LOW>;
> > > > >         pinctrl-names = "default";
> > > > > -       pinctrl-0 = <&pinctrl_ecspi3>;
> > > > > +       pinctrl-0 = <&pinctrl_ecspi3>, <&pinctrl_pmic_tpm_ena>;
> > > > 
> > > > Would it make more sense to have tpm pinctrl in node tpm@1 below?
> > > It's the pinctrl of the SPI Chip Select pin, not something about the
> > > TPM, I think it's correct to have it into the ecspi node.
> > 
> > The name pinctrl_pmic_tpm_ena seems confusing then.
> 
> I agree (this is coming from the schematics net name, let's blame the HW
> folks).
> 
> With that said, let's rename this to `pinctrl_tpm_spi_cs`. Vitor?

I will prepare a v2 with this small change.

Vitor Soares
> 
> Francesco
>