linux-kernel - Re: [PATCH v2 7/7] arm64: dts: exynos: gs101: enable i2c bus 12 on gs101-oriole

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Message-ID: <CAPLW+4nA4kzwdE5neOPvgEDAZ4RG0MBAkGKzFK=u3WG5FfZuMQ@mail.gmail.com>
Date: Mon, 29 Jan 2024 13:19:06 -0600
From: Sam Protsenko <semen.protsenko@...aro.org>
To: André Draszik <andre.draszik@...aro.org>
Cc: peter.griffin@...aro.org, mturquette@...libre.com, sboyd@...nel.org, 
	robh+dt@...nel.org, krzysztof.kozlowski+dt@...aro.org, conor+dt@...nel.org, 
	linux-kernel@...r.kernel.org, kernel-team@...roid.com, 
	tudor.ambarus@...aro.org, willmcvicker@...gle.com, 
	inux-kernel@...r.kernel.org, alim.akhtar@...sung.com, s.nawrocki@...sung.com, 
	tomasz.figa@...il.com, cw00.choi@...sung.com, 
	linux-arm-kernel@...ts.infradead.org, linux-samsung-soc@...r.kernel.org, 
	linux-clk@...r.kernel.org, devicetree@...r.kernel.org
Subject: Re: [PATCH v2 7/7] arm64: dts: exynos: gs101: enable i2c bus 12 on gs101-oriole

On Mon, Jan 29, 2024 at 11:42 AM André Draszik <andre.draszik@...aro.org> wrote:
>
> This bus has three USB-related devices attached to it:
>     0x25: Maxim 77759 Type-C port controller
>     0x35: Maxim 20339EWB Surge protection IC
>     0x36: Maxim 77759 Fuel gauge
>     0x57: NXP PCA9468 Battery charger
>     0x66: Maxim 77759 PMIC
>     0x69: Maxim 77759 Charger
> where the Maxim 77759 has multiple i2c slave addresses.
>
> These don't have (upstream) Linux drivers yet, but nevertheless we can
> enable the bus so as to allow working on them (and to make i2cdetect /
> i2cdump / etc. work).
>
> Signed-off-by: André Draszik <andre.draszik@...aro.org>
> Reviewed-by: Peter Griffin <peter.griffin@...aro.org>
>
> ---

Reviewed-by: Sam Protsenko <semen.protsenko@...aro.org>

> v2:
> * add short summary of devices attached to this bus & add TODO
> * collect Reviewed-by: tags
> ---
>  arch/arm64/boot/dts/exynos/google/gs101-oriole.dts | 10 ++++++++++
>  1 file changed, 10 insertions(+)
>
> diff --git a/arch/arm64/boot/dts/exynos/google/gs101-oriole.dts b/arch/arm64/boot/dts/exynos/google/gs101-oriole.dts
> index cb4d17339b6b..6ccade2c8cb4 100644
> --- a/arch/arm64/boot/dts/exynos/google/gs101-oriole.dts
> +++ b/arch/arm64/boot/dts/exynos/google/gs101-oriole.dts
> @@ -72,6 +72,11 @@ eeprom: eeprom@50 {
>         };
>  };
>
> +&hsi2c_12 {
> +       status = "okay";
> +       /* TODO: add the devices once drivers exist */
> +};
> +
>  &pinctrl_far_alive {
>         key_voldown: key-voldown-pins {
>                 samsung,pins = "gpa7-3";
> @@ -113,6 +118,11 @@ &usi8 {
>         status = "okay";
>  };
>
> +&usi12 {
> +       samsung,mode = <USI_V2_I2C>;
> +       status = "okay";
> +};
> +
>  &watchdog_cl0 {
>         timeout-sec = <30>;
>         status = "okay";
> --
> 2.43.0.429.g432eaa2c6b-goog
>