From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id CDA20C433EF for ; Wed, 9 Feb 2022 17:27:59 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:In-Reply-To:MIME-Version:Date: Message-ID:From:References:Cc:To:Subject:Reply-To:Content-ID: Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc :Resent-Message-ID:List-Owner; bh=n9zhiHhs3u5baR9SLdtkJGqn80ht1W27Q5lCJa26cf8=; b=Zx3Xx4DWCTevOZ9xYcPGKsXOjZ 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Arnd Bergmann , Olof Johansson , "maintainer:ARM AND ARM64 SoC SUB-ARCHITECTURES (COMMON PARTS)" , Rob Herring , Nicolas Saenz Julienne , Florian Fainelli , Ray Jui , Scott Branden , "maintainer:BROADCOM BCM281XX/BCM11XXX/BCM216XX ARM ARCHITE..." , "moderated list:ARM AND ARM64 SoC SUB-ARCHITECTURES (COMMON PARTS)" , "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" , "moderated list:BROADCOM BCM2711/BCM2835 ARM ARCHITECTURE" , =?UTF-8?Q?Uwe_Kleine-K=c3=b6nig?= References: <20220209162515.706729-1-detlev.casanova@collabora.com> <20220209162515.706729-2-detlev.casanova@collabora.com> From: Stefan Wahren Autocrypt: addr=stefan.wahren@i2se.com; keydata= LS0tLS1CRUdJTiBQR1AgUFVCTElDIEtFWSBCTE9DSy0tLS0tClZlcnNpb246IEdudVBHIHYy CgptUUlOQkZ0NmdCTUJFQUN1Yi9wQmV2SHhidkplZnlaRzMySklObW4yYnNFUFgyNVY2ZmVq bXlZd21DR0tqRnRMCi9Eb1VNRVZIRHhDSjQ3Qk1YbzM0NGZIVjFDM0FudWRnTjFCZWhMb0J0 TEh4bW5lQ3pnSDNLY1B0V1c3cHRqNEcKdEp2OUNRRFp5MjdTS29FUHh5YUk4Q0YweWdSeEpj 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MR-646709E3 X-CRM114-CacheID: sfid-20220209_092620_434295_75651E49 X-CRM114-Status: GOOD ( 21.35 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Hi Detlev, Am 09.02.22 um 17:25 schrieb Detlev Casanova: > The i2c0 device has 2 different busses controlled by a pinctrl. > This commit separates the device node into 2 i2c devices: > * pin 0: Base i2c bus > * pin 44: DSI i2c bus > > i2c0 is renamed to i2c0if so that device-trees referencing i2c0 don't > break and use the i2c0 node defined in i2c0mux node. > > i2c_csi_dsi can be used to control devices via the DSI i2c bus, used for > DSI displays. > > Signed-off-by: Detlev Casanova just a note: Uwe sends a similiar approach for the RTC on CM4 [1] which hasn't applied yet. [1] - https://www.spinics.net/lists/arm-kernel/msg944330.html > --- > arch/arm/boot/dts/bcm2711-rpi-4-b.dts | 1 + > arch/arm/boot/dts/bcm2711.dtsi | 2 +- > arch/arm/boot/dts/bcm2835-rpi.dtsi | 9 ++++--- > .../boot/dts/bcm283x-rpi-i2c0mux_0_44.dtsi | 4 +++ > arch/arm/boot/dts/bcm283x.dtsi | 26 ++++++++++++++++++- > 5 files changed, 37 insertions(+), 5 deletions(-) > create mode 100644 arch/arm/boot/dts/bcm283x-rpi-i2c0mux_0_44.dtsi > > diff --git a/arch/arm/boot/dts/bcm2711-rpi-4-b.dts b/arch/arm/boot/dts/bcm2711-rpi-4-b.dts > index 4432412044de..5dcce58817e6 100644 > --- a/arch/arm/boot/dts/bcm2711-rpi-4-b.dts > +++ b/arch/arm/boot/dts/bcm2711-rpi-4-b.dts > @@ -4,6 +4,7 @@ > #include "bcm2711-rpi.dtsi" > #include "bcm283x-rpi-usb-peripheral.dtsi" > #include "bcm283x-rpi-wifi-bt.dtsi" > +#include "bcm283x-rpi-i2c0mux_0_44.dtsi" > > / { > compatible = "raspberrypi,4-model-b", "brcm,bcm2711"; > diff --git a/arch/arm/boot/dts/bcm2711.dtsi b/arch/arm/boot/dts/bcm2711.dtsi > index 3b60297af7f6..bf6e8251c2c7 100644 > --- a/arch/arm/boot/dts/bcm2711.dtsi > +++ b/arch/arm/boot/dts/bcm2711.dtsi > @@ -1037,7 +1037,7 @@ &cma { > alloc-ranges = <0x0 0x00000000 0x40000000>; > }; > > -&i2c0 { > +&i2c0if { > compatible = "brcm,bcm2711-i2c", "brcm,bcm2835-i2c"; > interrupts = ; > }; > diff --git a/arch/arm/boot/dts/bcm2835-rpi.dtsi b/arch/arm/boot/dts/bcm2835-rpi.dtsi > index 87ddcad76083..1e38f9f0e80e 100644 > --- a/arch/arm/boot/dts/bcm2835-rpi.dtsi > +++ b/arch/arm/boot/dts/bcm2835-rpi.dtsi > @@ -49,13 +49,16 @@ alt0: alt0 { > }; > }; > > -&i2c0 { > - pinctrl-names = "default"; > - pinctrl-0 = <&i2c0_gpio0>; > +&i2c0if { > status = "okay"; > clock-frequency = <100000>; > }; > > +&i2c0mux { > + pinctrl-0 = <&i2c0_gpio0>; > + status = "okay"; > +}; > + > &i2c1 { > pinctrl-names = "default"; > pinctrl-0 = <&i2c1_gpio2>; > diff --git a/arch/arm/boot/dts/bcm283x-rpi-i2c0mux_0_44.dtsi b/arch/arm/boot/dts/bcm283x-rpi-i2c0mux_0_44.dtsi > new file mode 100644 > index 000000000000..119946d878db > --- /dev/null > +++ b/arch/arm/boot/dts/bcm283x-rpi-i2c0mux_0_44.dtsi > @@ -0,0 +1,4 @@ > +&i2c0mux { > + pinctrl-0 = <&i2c0_gpio0>; > + pinctrl-1 = <&i2c0_gpio44>; > +}; > diff --git a/arch/arm/boot/dts/bcm283x.dtsi b/arch/arm/boot/dts/bcm283x.dtsi > index a3e06b680947..06d04cde52b9 100644 > --- a/arch/arm/boot/dts/bcm283x.dtsi > +++ b/arch/arm/boot/dts/bcm283x.dtsi > @@ -334,7 +334,7 @@ spi: spi@7e204000 { > status = "disabled"; > }; > > - i2c0: i2c@7e205000 { > + i2c0if: i2c@7e205000 { > compatible = "brcm,bcm2835-i2c"; > reg = <0x7e205000 0x200>; > interrupts = <2 21>; > @@ -344,6 +344,30 @@ i2c0: i2c@7e205000 { > status = "disabled"; > }; > > + i2c0mux: i2c0mux { > + compatible = "i2c-mux-pinctrl"; > + #address-cells = <1>; > + #size-cells = <0>; > + > + i2c-parent = <&i2c0if>; > + > + pinctrl-names = "i2c0", "i2c_csi_dsi"; > + > + status = "disabled"; > + > + i2c0: i2c@0 { > + reg = <0>; > + #address-cells = <1>; > + #size-cells = <0>; > + }; > + > + i2c_csi_dsi: i2c@1 { > + reg = <1>; > + #address-cells = <1>; > + #size-cells = <0>; > + }; > + }; > + > dpi: dpi@7e208000 { > compatible = "brcm,bcm2835-dpi"; > reg = <0x7e208000 0x8c>; _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel