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[PATCH 3/4] arm64: dts: google: Add dts directory for Google-designed silicon

Posted by Douglas Anderson 3 months ago

The first four Google Tensor SoCs were offshoots of Samsung Exynos
SoCs and their device trees were organized under the "exynos/google"
directory. Starting with the Google Tensor G5 SoC in Pixel 10 phones,
Google Tensor SoCs are now of Google's own design. Add a location in
the tree to store these device tree files.

Signed-off-by: Douglas Anderson <dianders@chromium.org>
---

 MAINTAINERS                         | 1 +
 arch/arm64/Kconfig.platforms        | 6 ++++++
 arch/arm64/boot/dts/Makefile        | 1 +
 arch/arm64/boot/dts/google/Makefile | 1 +
 4 files changed, 9 insertions(+)
 create mode 100644 arch/arm64/boot/dts/google/Makefile

diff --git a/MAINTAINERS b/MAINTAINERS
index ddecf1ef3bed..f73a247ec61c 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -10606,6 +10606,7 @@ C:	irc://irc.oftc.net/pixel6-kernel-dev
 F:	Documentation/devicetree/bindings/clock/google,gs101-clock.yaml
 F:	Documentation/devicetree/bindings/soc/google/google,gs101-pmu-intr-gen.yaml
 F:	arch/arm64/boot/dts/exynos/google/
+F:	arch/arm64/boot/dts/google/
 F:	drivers/clk/samsung/clk-gs101.c
 F:	drivers/phy/samsung/phy-gs101-ufs.c
 F:	include/dt-bindings/clock/google,gs101.h
diff --git a/arch/arm64/Kconfig.platforms b/arch/arm64/Kconfig.platforms
index 13173795c43d..044af9a3b45f 100644
--- a/arch/arm64/Kconfig.platforms
+++ b/arch/arm64/Kconfig.platforms
@@ -138,6 +138,12 @@ config ARCH_EXYNOS
 	help
 	  This enables support for ARMv8 based Samsung Exynos SoC family.
 
+config ARCH_GOOGLE
+	bool "Google-Designed SoC family"
+	help
+	  This enables support for Google Tensor chips starting at the
+	  Google Tensor G5.
+
 config ARCH_K3
 	bool "Texas Instruments Inc. K3 multicore SoC architecture"
 	select SOC_TI
diff --git a/arch/arm64/boot/dts/Makefile b/arch/arm64/boot/dts/Makefile
index b0844404eda1..b4b5023d61d2 100644
--- a/arch/arm64/boot/dts/Makefile
+++ b/arch/arm64/boot/dts/Makefile
@@ -17,6 +17,7 @@ subdir-y += cavium
 subdir-y += cix
 subdir-y += exynos
 subdir-y += freescale
+subdir-y += google
 subdir-y += hisilicon
 subdir-y += intel
 subdir-y += lg
diff --git a/arch/arm64/boot/dts/google/Makefile b/arch/arm64/boot/dts/google/Makefile
new file mode 100644
index 000000000000..a6b187e2d631
--- /dev/null
+++ b/arch/arm64/boot/dts/google/Makefile
@@ -0,0 +1 @@
+# SPDX-License-Identifier: (GPL-2.0+ OR BSD-3-Clause)
-- 
2.51.2.1041.gc1ab5b90ca-goog

Re: [PATCH 3/4] arm64: dts: google: Add dts directory for Google-designed silicon

Posted by Krzysztof Kozlowski 3 months ago

On 11/11/2025 20:22, Douglas Anderson wrote:
> The first four Google Tensor SoCs were offshoots of Samsung Exynos
> SoCs and their device trees were organized under the "exynos/google"
> directory. Starting with the Google Tensor G5 SoC in Pixel 10 phones,
> Google Tensor SoCs are now of Google's own design. Add a location in
> the tree to store these device tree files.
> 
> Signed-off-by: Douglas Anderson <dianders@chromium.org>
> ---
> 
>  MAINTAINERS                         | 1 +
>  arch/arm64/Kconfig.platforms        | 6 ++++++
>  arch/arm64/boot/dts/Makefile        | 1 +
>  arch/arm64/boot/dts/google/Makefile | 1 +
>  4 files changed, 9 insertions(+)
>  create mode 100644 arch/arm64/boot/dts/google/Makefile
> 
> diff --git a/MAINTAINERS b/MAINTAINERS
> index ddecf1ef3bed..f73a247ec61c 100644
> --- a/MAINTAINERS
> +++ b/MAINTAINERS
> @@ -10606,6 +10606,7 @@ C:	irc://irc.oftc.net/pixel6-kernel-dev
>  F:	Documentation/devicetree/bindings/clock/google,gs101-clock.yaml
>  F:	Documentation/devicetree/bindings/soc/google/google,gs101-pmu-intr-gen.yaml
>  F:	arch/arm64/boot/dts/exynos/google/
> +F:	arch/arm64/boot/dts/google/
>  F:	drivers/clk/samsung/clk-gs101.c
>  F:	drivers/phy/samsung/phy-gs101-ufs.c
>  F:	include/dt-bindings/clock/google,gs101.h


I am fine with this but also please consider having separate maintainers
entry, because, as you said, this is a completely different SoC.

In any case, up to you folks.


> diff --git a/arch/arm64/Kconfig.platforms b/arch/arm64/Kconfig.platforms
> index 13173795c43d..044af9a3b45f 100644
> --- a/arch/arm64/Kconfig.platforms
> +++ b/arch/arm64/Kconfig.platforms
> @@ -138,6 +138,12 @@ config ARCH_EXYNOS
>  	help
>  	  This enables support for ARMv8 based Samsung Exynos SoC family.
>  
> +config ARCH_GOOGLE
> +	bool "Google-Designed SoC family"
> +	help
> +	  This enables support for Google Tensor chips starting at the
> +	  Google Tensor G5.
> +
>  config ARCH_K3
>  	bool "Texas Instruments Inc. K3 multicore SoC architecture"
>  	select SOC_TI
> diff --git a/arch/arm64/boot/dts/Makefile b/arch/arm64/boot/dts/Makefile
> index b0844404eda1..b4b5023d61d2 100644
> --- a/arch/arm64/boot/dts/Makefile
> +++ b/arch/arm64/boot/dts/Makefile
> @@ -17,6 +17,7 @@ subdir-y += cavium
>  subdir-y += cix
>  subdir-y += exynos
>  subdir-y += freescale
> +subdir-y += google
>  subdir-y += hisilicon
>  subdir-y += intel
>  subdir-y += lg
> diff --git a/arch/arm64/boot/dts/google/Makefile b/arch/arm64/boot/dts/google/Makefile
> new file mode 100644
> index 000000000000..a6b187e2d631
> --- /dev/null
> +++ b/arch/arm64/boot/dts/google/Makefile
> @@ -0,0 +1 @@
> +# SPDX-License-Identifier: (GPL-2.0+ OR BSD-3-Clause)
Drop the '+' in GPL license.


Best regards,
Krzysztof

Re: [PATCH 3/4] arm64: dts: google: Add dts directory for Google-designed silicon

Posted by Peter Griffin 2 months, 4 weeks ago

Hi Krzysztof & Doug,

On Wed, 12 Nov 2025 at 08:10, Krzysztof Kozlowski <krzk@kernel.org> wrote:
>
> On 11/11/2025 20:22, Douglas Anderson wrote:
> > The first four Google Tensor SoCs were offshoots of Samsung Exynos
> > SoCs and their device trees were organized under the "exynos/google"
> > directory. Starting with the Google Tensor G5 SoC in Pixel 10 phones,
> > Google Tensor SoCs are now of Google's own design. Add a location in
> > the tree to store these device tree files.
> >
> > Signed-off-by: Douglas Anderson <dianders@chromium.org>
> > ---
> >
> >  MAINTAINERS                         | 1 +
> >  arch/arm64/Kconfig.platforms        | 6 ++++++
> >  arch/arm64/boot/dts/Makefile        | 1 +
> >  arch/arm64/boot/dts/google/Makefile | 1 +
> >  4 files changed, 9 insertions(+)
> >  create mode 100644 arch/arm64/boot/dts/google/Makefile
> >
> > diff --git a/MAINTAINERS b/MAINTAINERS
> > index ddecf1ef3bed..f73a247ec61c 100644
> > --- a/MAINTAINERS
> > +++ b/MAINTAINERS
> > @@ -10606,6 +10606,7 @@ C:    irc://irc.oftc.net/pixel6-kernel-dev
> >  F:   Documentation/devicetree/bindings/clock/google,gs101-clock.yaml
> >  F:   Documentation/devicetree/bindings/soc/google/google,gs101-pmu-intr-gen.yaml
> >  F:   arch/arm64/boot/dts/exynos/google/
> > +F:   arch/arm64/boot/dts/google/
> >  F:   drivers/clk/samsung/clk-gs101.c
> >  F:   drivers/phy/samsung/phy-gs101-ufs.c
> >  F:   include/dt-bindings/clock/google,gs101.h
>
>
> I am fine with this but also please consider having separate maintainers
> entry, because, as you said, this is a completely different SoC.
>
> In any case, up to you folks.

Doug did reach out to me prior to posting. We are OK having it here
(happy to help with Laguna). Most of the exynos specific SoC drivers
are under ARM/SAMSUNG entry anyway. There will be some Laguna SoC
drivers for pinctrl, clocks etc, but many of the IPs are designware so
likely to have existing entries (uart, i2c, spi, i3c, usb etc).

>
> > diff --git a/arch/arm64/Kconfig.platforms b/arch/arm64/Kconfig.platforms
> > index 13173795c43d..044af9a3b45f 100644
> > --- a/arch/arm64/Kconfig.platforms
> > +++ b/arch/arm64/Kconfig.platforms
> > @@ -138,6 +138,12 @@ config ARCH_EXYNOS
> >       help
> >         This enables support for ARMv8 based Samsung Exynos SoC family.
> >
> > +config ARCH_GOOGLE
> > +     bool "Google-Designed SoC family"
> > +     help
> > +       This enables support for Google Tensor chips starting at the
> > +       Google Tensor G5.

It might be worth adding (Laguna) here

With that addressed:
Reviewed-by: Peter Griffin <peter.griffin@linaro.org>

regards,

Peter

Re: [PATCH 3/4] arm64: dts: google: Add dts directory for Google-designed silicon

Posted by Linus Walleij 2 months, 4 weeks ago

On Wed, Nov 12, 2025 at 1:26 PM Peter Griffin <peter.griffin@linaro.org> wrote:

> There will be some Laguna SoC
> drivers for pinctrl, clocks etc,

Oh new pin control, interesting!

Will you be doing the upstreaming of that?

Yours,
Linus Walleij

Re: [PATCH 3/4] arm64: dts: google: Add dts directory for Google-designed silicon

Posted by Peter Griffin 2 months, 4 weeks ago

Hi Linus,

On Wed, 12 Nov 2025 at 12:36, Linus Walleij <linus.walleij@linaro.org> wrote:
>
> On Wed, Nov 12, 2025 at 1:26 PM Peter Griffin <peter.griffin@linaro.org> wrote:
>
> > There will be some Laguna SoC
> > drivers for pinctrl, clocks etc,
>
> Oh new pin control, interesting!
>
> Will you be doing the upstreaming of that?

It will most likely be Doug, not sure if he's started looking at that
yet though.

Peter