From nobody Thu Dec 18 21:19:46 2025 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id A2242C77B61 for ; Mon, 1 May 2023 09:16:21 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232335AbjEAJQU (ORCPT ); Mon, 1 May 2023 05:16:20 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:38296 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232231AbjEAJQD (ORCPT ); Mon, 1 May 2023 05:16:03 -0400 Received: from mail-ej1-x635.google.com (mail-ej1-x635.google.com [IPv6:2a00:1450:4864:20::635]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id B660AB9 for ; Mon, 1 May 2023 02:16:00 -0700 (PDT) Received: by mail-ej1-x635.google.com with SMTP id a640c23a62f3a-95f4c5cb755so465965466b.0 for ; Mon, 01 May 2023 02:16:00 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=9elements.com; s=google; t=1682932559; x=1685524559; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=cQeLaD3HUZbD2Ee3JfwMlwyfJrMSNuv/+sgPjlCpSVc=; b=TvhGRJGTK89DC0+U4lIRW+jv5IeBkYB5JNILcUIgu1mHGLN14ptqmmQHWK4CMX8JYU GokEDh2j1R9NWkT16/PSOYTLWtkd8tw3TRfImrsNREAAK3Gspkg94QAJQcbXXU4jvVkd 8pyKNjDa3hnTq10wo0V6muWENjUTBn2uo/bsp+Fu59Zi/0uF5ETm5AEZNXlo8mVnaoZ2 Fcvcttmm2Kt63DVk4+pwJq4c7eIFSKYE7jySDK8sl7L+L8TnTUIF1UKr2mXVFiuTxV/4 2pNTlLMaVJeUEjwXYHVLVC1iLvTRyVdRTSwh/UemlcchVAEpSpfZRfPt3g1szDP7sDUN qVKg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1682932559; x=1685524559; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=cQeLaD3HUZbD2Ee3JfwMlwyfJrMSNuv/+sgPjlCpSVc=; b=HM5343nwksQXbW0ZMaU7weMC8L5Llp1CS1qIp6FJhASQFYu8nP3ptjSHWr7umgqSWg rehIU62AIgtwSS92hXoJo73L8IKtGRdTewvnsvWNobWaj1VroT5RlKYda/Q6ddB0uxA+ sSaOr1WodUFIeR4Z/exJ3h2kGgHVQ+RHhSdqKXOHSgKpCUPJSN/ZbiaAwkQ2ubXmB18Z 6QxFn/mZKAt9b6X/uS9kaPOA201UMqJse6T222NOoDv/TyndM94Iu5dG+ziLvPUk+/mt Lwp7CkoVlNs0kfgUnFgV68JMncMrvmVDqk98YWmmXqbMmDmC5SnD9HfmtT84YCKg4Ba1 6S6g== X-Gm-Message-State: AC+VfDxlz2XL3oiA7iXnjUJBtEcfqLUrfNpM48TeT9ZEB7z2ak43ShB7 +srvCgvQCYzjI11OD4G72kDBLQ== X-Google-Smtp-Source: ACHHUZ7LMzO3p4PsUnv9BbyEsQ4mDxsTpVPrsv8tedfXsc2elSsmvw1CgHgA2MrnBJuWb0QFwYyIJg== X-Received: by 2002:a17:907:1b08:b0:961:be96:b0e6 with SMTP id mp8-20020a1709071b0800b00961be96b0e6mr317390ejc.68.1682932559076; Mon, 01 May 2023 02:15:59 -0700 (PDT) Received: from fedora.. (ip-095-222-150-251.um34.pools.vodafone-ip.de. [95.222.150.251]) by smtp.gmail.com with ESMTPSA id xa3-20020a170907b9c300b0094e954fd015sm14714266ejc.175.2023.05.01.02.15.58 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 01 May 2023 02:15:58 -0700 (PDT) From: Patrick Rudolph To: Peter Rosin Cc: Patrick Rudolph , linux-i2c@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v14 3/4] i2c: muxes: pca954x: Add MAX735x/MAX736x support Date: Mon, 1 May 2023 11:15:50 +0200 Message-Id: <20230501091552.847240-4-patrick.rudolph@9elements.com> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20230501091552.847240-1-patrick.rudolph@9elements.com> References: <20230501091552.847240-1-patrick.rudolph@9elements.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" Add support for the following Maxim chips using the existing PCA954x driver: - MAX7356 - MAX7357 - MAX7358 - MAX7367 - MAX7368 - MAX7369 All added Maxim chips behave like the PCA954x, where a single SMBUS byte write selects up to 8 channels to be bridged to the primary bus. While the MAX7357/MAX7358 have interrupt support, they don't act as interrupt controller like the PCA9545 does. Thus don't enable IRQ support and handle them like the PCA9548. Tested using the MAX7357. Signed-off-by: Patrick Rudolph --- drivers/i2c/muxes/Kconfig | 6 +-- drivers/i2c/muxes/i2c-mux-pca954x.c | 64 ++++++++++++++++++++++++++++- 2 files changed, 66 insertions(+), 4 deletions(-) diff --git a/drivers/i2c/muxes/Kconfig b/drivers/i2c/muxes/Kconfig index ea838dbae32e..db1b9057612a 100644 --- a/drivers/i2c/muxes/Kconfig +++ b/drivers/i2c/muxes/Kconfig @@ -65,11 +65,11 @@ config I2C_MUX_PCA9541 will be called i2c-mux-pca9541. =20 config I2C_MUX_PCA954x - tristate "NXP PCA954x and PCA984x I2C Mux/switches" + tristate "NXP PCA954x/PCA984x and Maxim MAX735x/MAX736x I2C Mux/switches" depends on GPIOLIB || COMPILE_TEST help - If you say yes here you get support for the NXP PCA954x - and PCA984x I2C mux/switch devices. + If you say yes here you get support for NXP PCA954x/PCA984x + and Maxim MAX735x/MAX736x I2C mux/switch devices. =20 This driver can also be built as a module. If so, the module will be called i2c-mux-pca954x. diff --git a/drivers/i2c/muxes/i2c-mux-pca954x.c b/drivers/i2c/muxes/i2c-mu= x-pca954x.c index 0ccee2ae5720..968111442625 100644 --- a/drivers/i2c/muxes/i2c-mux-pca954x.c +++ b/drivers/i2c/muxes/i2c-mux-pca954x.c @@ -4,6 +4,7 @@ * * Copyright (c) 2008-2009 Rodolfo Giometti * Copyright (c) 2008-2009 Eurotech S.p.A. + * Copyright (c) 2022 9elements GmbH * * This module supports the PCA954x and PCA984x series of I2C multiplexer/= switch * chips made by NXP Semiconductors. @@ -11,6 +12,12 @@ * PCA9540, PCA9542, PCA9543, PCA9544, PCA9545, PCA9546, PCA9547, * PCA9548, PCA9846, PCA9847, PCA9848 and PCA9849. * + * It's also compatible to Maxims MAX735x I2C switch chips, which are cont= rolled + * as the NXP PCA9548 and the MAX736x chips that act like the PCA9544. + * + * This includes the: + * MAX7356, MAX7357, MAX7358, MAX7367, MAX7368 and MAX7369 + * * These chips are all controlled via the I2C bus itself, and all have a * single 8-bit register. The upstream "parent" bus fans out to two, * four, or eight downstream busses or channels; which of these @@ -51,6 +58,12 @@ #define PCA954X_IRQ_OFFSET 4 =20 enum pca_type { + max_7356, + max_7357, + max_7358, + max_7367, + max_7368, + max_7369, pca_9540, pca_9542, pca_9543, @@ -90,8 +103,45 @@ struct pca954x { raw_spinlock_t lock; }; =20 -/* Provide specs for the PCA954x types we know about */ +/* Provide specs for the MAX735x, PCA954x and PCA984x types we know about = */ static const struct chip_desc chips[] =3D { + [max_7356] =3D { + .nchans =3D 8, + .muxtype =3D pca954x_isswi, + .id =3D { .manufacturer_id =3D I2C_DEVICE_ID_NONE }, + }, + [max_7357] =3D { + .nchans =3D 8, + .muxtype =3D pca954x_isswi, + .id =3D { .manufacturer_id =3D I2C_DEVICE_ID_NONE }, + /* No interrupt controller support. + The interrupt provides information about stuck channels. */ + }, + [max_7358] =3D { + .nchans =3D 8, + .muxtype =3D pca954x_isswi, + .id =3D { .manufacturer_id =3D I2C_DEVICE_ID_NONE }, + /* No interrupt controller support. + The interrupt provides information about stuck channels. */ + }, + [max_7367] =3D { + .nchans =3D 4, + .muxtype =3D pca954x_isswi, + .has_irq =3D 1, + .id =3D { .manufacturer_id =3D I2C_DEVICE_ID_NONE }, + }, + [max_7368] =3D { + .nchans =3D 4, + .muxtype =3D pca954x_isswi, + .id =3D { .manufacturer_id =3D I2C_DEVICE_ID_NONE }, + }, + [max_7369] =3D { + .nchans =3D 4, + .enable =3D 0x4, + .muxtype =3D pca954x_ismux, + .has_irq =3D 1, + .id =3D { .manufacturer_id =3D I2C_DEVICE_ID_NONE }, + }, [pca_9540] =3D { .nchans =3D 2, .enable =3D 0x4, @@ -177,6 +227,12 @@ static const struct chip_desc chips[] =3D { }; =20 static const struct i2c_device_id pca954x_id[] =3D { + { "max7356", max_7356 }, + { "max7357", max_7357 }, + { "max7358", max_7358 }, + { "max7367", max_7367 }, + { "max7368", max_7368 }, + { "max7369", max_7369 }, { "pca9540", pca_9540 }, { "pca9542", pca_9542 }, { "pca9543", pca_9543 }, @@ -194,6 +250,12 @@ static const struct i2c_device_id pca954x_id[] =3D { MODULE_DEVICE_TABLE(i2c, pca954x_id); =20 static const struct of_device_id pca954x_of_match[] =3D { + { .compatible =3D "maxim,max7356", .data =3D &chips[max_7356] }, + { .compatible =3D "maxim,max7357", .data =3D &chips[max_7357] }, + { .compatible =3D "maxim,max7358", .data =3D &chips[max_7358] }, + { .compatible =3D "maxim,max7367", .data =3D &chips[max_7367] }, + { .compatible =3D "maxim,max7368", .data =3D &chips[max_7368] }, + { .compatible =3D "maxim,max7369", .data =3D &chips[max_7369] }, { .compatible =3D "nxp,pca9540", .data =3D &chips[pca_9540] }, { .compatible =3D "nxp,pca9542", .data =3D &chips[pca_9542] }, { .compatible =3D "nxp,pca9543", .data =3D &chips[pca_9543] }, --=20 2.39.2