From: Gregory CLEMENT <gregory.clement@bootlin.com>
To: Russell King <rmk+kernel@armlinux.org.uk>,
Vladimir Vid <vladimir.vid@sartura.hr>
Cc: Mark Rutland <mark.rutland@arm.com>, Andrew Lunn <andrew@lunn.ch>,
Jason Cooper <jason@lakedaemon.net>,
devicetree@vger.kernel.org, Rob Herring <robh+dt@kernel.org>,
linux-arm-kernel@lists.infradead.org,
Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
Subject: Re: [PATCH 2/2] arm64: dts: uDPU: remove i2c-fast-mode
Date: Mon, 09 Dec 2019 15:38:10 +0100 [thread overview]
Message-ID: <87lfrlh8dp.fsf@FE-laptop> (raw)
In-Reply-To: <E1iVvuv-0002sk-Sw@rmk-PC.armlinux.org.uk>
Russell King <rmk+kernel@armlinux.org.uk> writes:
> The I2C bus violates the timing specifications when run in fast mode
> on the uDPU, so switch to 100kHz mode.
>
> Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
Applied on mvebu/dt64
Thanks,
Gregory
> ---
> arch/arm64/boot/dts/marvell/armada-3720-uDPU.dts | 2 ++
> 1 file changed, 2 insertions(+)
>
> diff --git a/arch/arm64/boot/dts/marvell/armada-3720-uDPU.dts b/arch/arm64/boot/dts/marvell/armada-3720-uDPU.dts
> index e31813a4f972..2ac1d9ae1e25 100644
> --- a/arch/arm64/boot/dts/marvell/armada-3720-uDPU.dts
> +++ b/arch/arm64/boot/dts/marvell/armada-3720-uDPU.dts
> @@ -119,12 +119,14 @@
> status = "okay";
> pinctrl-names = "default";
> pinctrl-0 = <&i2c1_pins>;
> + /delete-property/mrvl,i2c-fast-mode;
> };
>
> &i2c1 {
> status = "okay";
> pinctrl-names = "default";
> pinctrl-0 = <&i2c2_pins>;
> + /delete-property/mrvl,i2c-fast-mode;
>
> lm75@48 {
> status = "okay";
> --
> 2.20.1
>
--
Gregory Clement, Bootlin
Embedded Linux and Kernel engineering
http://bootlin.com
_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
WARNING: multiple messages have this Message-ID (diff)
From: Gregory CLEMENT <gregory.clement@bootlin.com>
To: Russell King <rmk+kernel@armlinux.org.uk>,
Vladimir Vid <vladimir.vid@sartura.hr>
Cc: Jason Cooper <jason@lakedaemon.net>, Andrew Lunn <andrew@lunn.ch>,
Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>,
Rob Herring <robh+dt@kernel.org>,
Mark Rutland <mark.rutland@arm.com>,
linux-arm-kernel@lists.infradead.org, devicetree@vger.kernel.org
Subject: Re: [PATCH 2/2] arm64: dts: uDPU: remove i2c-fast-mode
Date: Mon, 09 Dec 2019 15:38:10 +0100 [thread overview]
Message-ID: <87lfrlh8dp.fsf@FE-laptop> (raw)
In-Reply-To: <E1iVvuv-0002sk-Sw@rmk-PC.armlinux.org.uk>
Russell King <rmk+kernel@armlinux.org.uk> writes:
> The I2C bus violates the timing specifications when run in fast mode
> on the uDPU, so switch to 100kHz mode.
>
> Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
Applied on mvebu/dt64
Thanks,
Gregory
> ---
> arch/arm64/boot/dts/marvell/armada-3720-uDPU.dts | 2 ++
> 1 file changed, 2 insertions(+)
>
> diff --git a/arch/arm64/boot/dts/marvell/armada-3720-uDPU.dts b/arch/arm64/boot/dts/marvell/armada-3720-uDPU.dts
> index e31813a4f972..2ac1d9ae1e25 100644
> --- a/arch/arm64/boot/dts/marvell/armada-3720-uDPU.dts
> +++ b/arch/arm64/boot/dts/marvell/armada-3720-uDPU.dts
> @@ -119,12 +119,14 @@
> status = "okay";
> pinctrl-names = "default";
> pinctrl-0 = <&i2c1_pins>;
> + /delete-property/mrvl,i2c-fast-mode;
> };
>
> &i2c1 {
> status = "okay";
> pinctrl-names = "default";
> pinctrl-0 = <&i2c2_pins>;
> + /delete-property/mrvl,i2c-fast-mode;
>
> lm75@48 {
> status = "okay";
> --
> 2.20.1
>
--
Gregory Clement, Bootlin
Embedded Linux and Kernel engineering
http://bootlin.com
next prev parent reply other threads:[~2019-12-09 14:38 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-11-16 11:07 [PATCH 2/2] arm64: dts: uDPU: remove i2c-fast-mode Russell King
2019-11-16 11:07 ` Russell King
2019-12-09 14:38 ` Gregory CLEMENT [this message]
2019-12-09 14:38 ` Gregory CLEMENT
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