linux-kernel - Re: [PATCH v3 7/7] arm64: dts: exynos: gs101: enable i2c bus 12 on gs101-oriole

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Message-ID: <338efca2-d1fe-4adb-8275-5f570ab445d8@linaro.org>
Date: Tue, 30 Jan 2024 09:12:26 +0000
From: Tudor Ambarus <tudor.ambarus@...aro.org>
To: André Draszik <andre.draszik@...aro.org>,
 peter.griffin@...aro.org, mturquette@...libre.com, sboyd@...nel.org,
 robh+dt@...nel.org, krzysztof.kozlowski+dt@...aro.org, conor+dt@...nel.org
Cc: linux-kernel@...r.kernel.org, kernel-team@...roid.com,
 willmcvicker@...gle.com, semen.protsenko@...aro.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 v3 7/7] arm64: dts: exynos: gs101: enable i2c bus 12 on
 gs101-oriole



On 1/29/24 17:46, André Draszik 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: Tudor Ambarus <tudor.ambarus@...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";