From nobody Sat Feb 7 17:42:02 2026 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 0C543C001DE for ; Fri, 28 Jul 2023 14:19:44 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S237031AbjG1OTm (ORCPT ); Fri, 28 Jul 2023 10:19:42 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44302 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S236359AbjG1OTa (ORCPT ); Fri, 28 Jul 2023 10:19:30 -0400 Received: from mail-wm1-x334.google.com (mail-wm1-x334.google.com [IPv6:2a00:1450:4864:20::334]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 81F871724 for ; Fri, 28 Jul 2023 07:19:28 -0700 (PDT) Received: by mail-wm1-x334.google.com with SMTP id 5b1f17b1804b1-3fbc1218262so23179475e9.3 for ; Fri, 28 Jul 2023 07:19:28 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=baylibre-com.20221208.gappssmtp.com; s=20221208; t=1690553967; x=1691158767; 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=KudsjLXhwuLL2d8mNXrF7qeXjTkj4g+r6rSckABUYoI=; b=Z2kDCPjN1LPXmd6+dLzNEdwFl0tm/J1OLyqOgx9lpAsei0DTcOZ9Rm1TDDyeMaVx4Q 3TANE5fPp+7puCmC7KkIkWm8DLldEvX2ymDm6Z3g86nbpRbss9VIUAsUEukjSlLf107L l07dHdPmuGB1D1F6XIuVwYaY4mWWFIc2GEC4tbe4UoB6KPJdJHyPrTjvWZkFocjJMFFh INI30gTj79+BSROU9eSzL7vz5c9j23uYGU+fMqgGmzsmpmPKqyRIc8wCFo9ra4nfADpW AujkGy8Gsl+XROI4Q/lME/cNih96/ktTbwm7FBKcBPack9lbfXjLSlqPdw+pCbBH/j+5 MFcg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1690553967; x=1691158767; 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=KudsjLXhwuLL2d8mNXrF7qeXjTkj4g+r6rSckABUYoI=; b=IAQ8Zv+9+99a1nj2lZDBALXSnbAsB9nYgtOknWu9w/rgTCchNB34/hWsHduJcuNpIj q3ooMm51P3MHGYESU+CdcGELWS6d9ZWoNPqdVcgliNn4WAhyHynhN9GZkn1CRd0RUCJn qghlmtqTjJZiyC43IaSR/14TwnJAAW/tvamYNbWguiLQ6WhIK3AOYbfHX43Ln6GKNPWZ K1DvHDzBK96APS6IgcmyDQpOwt/kuNlaUZwMMKjgm/2cTTlU3vMe7vhGBKhyrv0BzDSB jeuoB/lPjhlU9SwuWsvnjCmSrQ7MztVyxq7lufVe1f/Q0M8zph4eC+4YNs/VoNzlZcey 9Svw== X-Gm-Message-State: ABy/qLasG3DWUity7VvH0TF9X2MBdiFAfbCEZZGRu+FpZFNZEsMEfPv6 8GGjkf10xFh/ynmvc3b1YJvGew== X-Google-Smtp-Source: APBJJlFlCbcYPtP9PubsLuQd0EaqWiZsnjn2BGoHiyX0S1ujBgKIIU8F6mzjr6MSr0vf3fYIXplKTw== X-Received: by 2002:a1c:4c12:0:b0:3fd:ad65:ea8b with SMTP id z18-20020a1c4c12000000b003fdad65ea8bmr1857466wmf.12.1690553966984; Fri, 28 Jul 2023 07:19:26 -0700 (PDT) Received: from blmsp.fritz.box ([2001:4090:a246:80e3:766f:be78:d79a:8686]) by smtp.gmail.com with ESMTPSA id l6-20020adfe586000000b0031416362e23sm5013681wrm.3.2023.07.28.07.19.26 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 28 Jul 2023 07:19:26 -0700 (PDT) From: Markus Schneider-Pargmann To: Wolfgang Grandegger , Marc Kleine-Budde , Rob Herring , Krzysztof Kozlowski Cc: "David S . Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Conor Dooley , Chandrasekar Ramakrishnan , Michal Kubiak , Vivek Yadav , linux-can@vger.kernel.org, netdev@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, Simon Horman , Markus Schneider-Pargmann , Krzysztof Kozlowski Subject: [PATCH v4 1/6] dt-bindings: can: tcan4x5x: Add tcan4552 and tcan4553 variants Date: Fri, 28 Jul 2023 16:19:18 +0200 Message-Id: <20230728141923.162477-2-msp@baylibre.com> X-Mailer: git-send-email 2.40.1 In-Reply-To: <20230728141923.162477-1-msp@baylibre.com> References: <20230728141923.162477-1-msp@baylibre.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" These two new chips do not have state or wake pins. Signed-off-by: Markus Schneider-Pargmann Acked-by: Krzysztof Kozlowski Reviewed-by: Rob Herring --- .../devicetree/bindings/net/can/tcan4x5x.txt | 11 ++++++++--- 1 file changed, 8 insertions(+), 3 deletions(-) diff --git a/Documentation/devicetree/bindings/net/can/tcan4x5x.txt b/Docum= entation/devicetree/bindings/net/can/tcan4x5x.txt index e3501bfa22e9..170e23f0610d 100644 --- a/Documentation/devicetree/bindings/net/can/tcan4x5x.txt +++ b/Documentation/devicetree/bindings/net/can/tcan4x5x.txt @@ -4,7 +4,10 @@ Texas Instruments TCAN4x5x CAN Controller This file provides device node information for the TCAN4x5x interface cont= ains. =20 Required properties: - - compatible: "ti,tcan4x5x" + - compatible: + "ti,tcan4552", "ti,tcan4x5x" + "ti,tcan4553", "ti,tcan4x5x" or + "ti,tcan4x5x" - reg: 0 - #address-cells: 1 - #size-cells: 0 @@ -21,8 +24,10 @@ Optional properties: - reset-gpios: Hardwired output GPIO. If not defined then software reset. - device-state-gpios: Input GPIO that indicates if the device is in - a sleep state or if the device is active. - - device-wake-gpios: Wake up GPIO to wake up the TCAN device. + a sleep state or if the device is active. Not + available with tcan4552/4553. + - device-wake-gpios: Wake up GPIO to wake up the TCAN device. Not + available with tcan4552/4553. =20 Example: tcan4x5x: tcan4x5x@0 { --=20 2.40.1 From nobody Sat Feb 7 17:42:02 2026 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 8BAF1C04A6A for ; Fri, 28 Jul 2023 14:19:46 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S237020AbjG1OTo (ORCPT ); Fri, 28 Jul 2023 10:19:44 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44334 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S236995AbjG1OTb (ORCPT ); Fri, 28 Jul 2023 10:19:31 -0400 Received: from mail-wm1-x335.google.com (mail-wm1-x335.google.com [IPv6:2a00:1450:4864:20::335]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 5BA2D3ABF for ; Fri, 28 Jul 2023 07:19:29 -0700 (PDT) Received: by mail-wm1-x335.google.com with SMTP id 5b1f17b1804b1-3fde57684d7so21975685e9.2 for ; Fri, 28 Jul 2023 07:19:29 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=baylibre-com.20221208.gappssmtp.com; s=20221208; t=1690553968; x=1691158768; 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=aOPR69iAQ16PRI3TWa1E2gZcgSDBVpUe2mB3Tg7XdFY=; b=eCfDNPSl7vSoyBHYmOveE8fuDlgi8ZipveyzGaTlPOC0Q2OpbSPndzkwgMyclgAda/ V6WTHb/DKo1bo2kDoa0OhOJhJ4PL5NQqBFKROAUwm4e9A72r5un/Wtm8JoiZhb4l0DE1 Vs++o1lVFVOTFyUwli6h3oJ+wHe8tIxqaUvdlCDdAphocUK+ygU+y9/PrDVt7fIk7CW7 Ms2GNLTCZO5/X4rTwRGcPHx0MtToecCzRNkrPA7W26gLn5kE3H/GoJhCCBHIbzGQIXn5 Jszk8Jw96jdQ0daJjcTZN11nmfyS6iMVC2HVfmGVY0NLDFC3N9ANmvlVym1ZBAg+pMsx d+pg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1690553968; x=1691158768; 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=aOPR69iAQ16PRI3TWa1E2gZcgSDBVpUe2mB3Tg7XdFY=; b=JQcwwF5S+TY6hddo1G8dhFH2BpwCe/oxgvmm6qUW4Kn7oqSzeKrdNTdZgLm38NlkEN 2gI7dlZDYqD6PHeyXrTpFOdp5xVlYMb2uUWPlaHtYwwMAMCGJJ/2INXRagQgSez+yQ4u A0AiibrCO5icBXmow0kdwgC42jAH0fdWl/gLR+B0tKJA4knfpqWAbNDIjnSadyjYGAQV rW8ejtHqVtsi92LH29ZRkSAOI2fiGJrK6lcUFZBs2lRZjSMQikTyXqn6G4QeuzwyYgaQ ovlNP8+djtYWEZrpLKay6N3Jguc2yxcW4rpnwnZEWo3MaKeC8w/kTkxhZBbzZnpZ0nX0 1PDQ== X-Gm-Message-State: ABy/qLbbhZSoYQNuWuI+oPid/UTcb8PbZ1Wa06iiumWFSH7zEI8qel00 MOWr/lgYhHRsx9xgw02aUBoPOg== X-Google-Smtp-Source: APBJJlFhR9WAI6qiGI8oGXWvZ/UsZ0vbMPJ3iXVMm2YZyySkV1K6NGpHXIsauRuCoGnRq9hod7gT/A== X-Received: by 2002:a5d:5101:0:b0:313:f5f8:a331 with SMTP id s1-20020a5d5101000000b00313f5f8a331mr1763758wrt.34.1690553967911; Fri, 28 Jul 2023 07:19:27 -0700 (PDT) Received: from blmsp.fritz.box ([2001:4090:a246:80e3:766f:be78:d79a:8686]) by smtp.gmail.com with ESMTPSA id l6-20020adfe586000000b0031416362e23sm5013681wrm.3.2023.07.28.07.19.27 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 28 Jul 2023 07:19:27 -0700 (PDT) From: Markus Schneider-Pargmann To: Wolfgang Grandegger , Marc Kleine-Budde , Rob Herring , Krzysztof Kozlowski Cc: "David S . Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Conor Dooley , Chandrasekar Ramakrishnan , Michal Kubiak , Vivek Yadav , linux-can@vger.kernel.org, netdev@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, Simon Horman , Markus Schneider-Pargmann Subject: [PATCH v4 2/6] can: tcan4x5x: Remove reserved register 0x814 from writable table Date: Fri, 28 Jul 2023 16:19:19 +0200 Message-Id: <20230728141923.162477-3-msp@baylibre.com> X-Mailer: git-send-email 2.40.1 In-Reply-To: <20230728141923.162477-1-msp@baylibre.com> References: <20230728141923.162477-1-msp@baylibre.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" The mentioned register is not writable. It is reserved and should not be written. Fixes: 39dbb21b6a29 ("can: tcan4x5x: Specify separate read/write ranges") Signed-off-by: Markus Schneider-Pargmann Reviewed-by: Michal Kubiak --- drivers/net/can/m_can/tcan4x5x-regmap.c | 1 - 1 file changed, 1 deletion(-) diff --git a/drivers/net/can/m_can/tcan4x5x-regmap.c b/drivers/net/can/m_ca= n/tcan4x5x-regmap.c index 2b218ce04e9f..fafa6daa67e6 100644 --- a/drivers/net/can/m_can/tcan4x5x-regmap.c +++ b/drivers/net/can/m_can/tcan4x5x-regmap.c @@ -95,7 +95,6 @@ static const struct regmap_range tcan4x5x_reg_table_wr_ra= nge[] =3D { regmap_reg_range(0x000c, 0x0010), /* Device configuration registers and Interrupt Flags*/ regmap_reg_range(0x0800, 0x080c), - regmap_reg_range(0x0814, 0x0814), regmap_reg_range(0x0820, 0x0820), regmap_reg_range(0x0830, 0x0830), /* M_CAN */ --=20 2.40.1 From nobody Sat Feb 7 17:42:02 2026 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 DA65DC001DE for ; Fri, 28 Jul 2023 14:20:56 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236686AbjG1OUy (ORCPT ); Fri, 28 Jul 2023 10:20:54 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44294 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S236993AbjG1OTc (ORCPT ); Fri, 28 Jul 2023 10:19:32 -0400 Received: from mail-wr1-x433.google.com (mail-wr1-x433.google.com [IPv6:2a00:1450:4864:20::433]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 591ABB5 for ; Fri, 28 Jul 2023 07:19:30 -0700 (PDT) Received: by mail-wr1-x433.google.com with SMTP id ffacd0b85a97d-31751d7d96eso2022033f8f.1 for ; Fri, 28 Jul 2023 07:19:30 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=baylibre-com.20221208.gappssmtp.com; s=20221208; t=1690553969; x=1691158769; 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=mzaljnOO1Gw4qS38ZHWvBAE06zq5Umr4CoJZWfxvzDg=; b=xUKyFTsSuvcbCo9x7xJzgCo0oi8PFn1TINP4lMKpkxprTf0fSFnKI6CO/S5K6BG4U4 aoSzf21spDOrbbJxqmOzt3E2ezOIXsAIegZZXaBpZ9sTRLPzZnHfC4sH6o6QWLc8Rogr +yXcap8TxO+tUAf6McFVa8Iuk4X2x1lQaF3GXWSpz64Q4LI590V++pfeW+hUbDZ/qbCK FdP4mQBw+v/PRGEN8ni/vSzX4KVKhkasOtgZvmStCpQZ5+cI1dpATaCtFOrMzXBBOSQh 9MVaZXQDFeOApmJTmwVjSyFg6Y6Vt3Z6yE8pIAkRw08w7U+eKNQ/aROZB6Tck/bZQ/SC +Y5A== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1690553969; x=1691158769; 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=mzaljnOO1Gw4qS38ZHWvBAE06zq5Umr4CoJZWfxvzDg=; b=W/0vYm4m5so4JLFEqP1hhvok/PoHg8ir4A2c920NeMQJg95jLF/Y0u5XS6vjFDTxOY tZU/TMwaWlELr6BnkRDcOMFiex5vn/7B76pgd31K/2QsHzlf4Q9dh1z5fmSY/jBptFRB RdWiqTBqWIR3OwhCAyozns3nQ1djLr7hoCZIw4KhFyUWpYdUKnw6G576pm3mSv/LDBX9 SqVCJ/59FZCCWow833yuzVxs3ltUWr2gdhcis0tDwad7ln3ZwkvGu8LMjm3Y94CH6AV4 p3iE0hqfNewvf5Gg2Oz2ZEoWBva1DwE0Y7YsvVy3fqFrfHrhvZHZc5hxuNifWXP/iUqU 7/JA== X-Gm-Message-State: ABy/qLZb/Lqp+2Boet00roTHetY0jLFB7YHS/5hRN9wRl/UkV7dtaCfL 1oCTC3EUbmeBW2Qxowkn2/LoZA== X-Google-Smtp-Source: APBJJlFcmt7PAwt3/8ccEaz69Q1c5nt6HSR44F+rbNLEzPLymPTwyiEBTmcnY9kb/BekXh461NYLFw== X-Received: by 2002:adf:d84b:0:b0:317:568d:d69a with SMTP id k11-20020adfd84b000000b00317568dd69amr1991756wrl.11.1690553968837; Fri, 28 Jul 2023 07:19:28 -0700 (PDT) Received: from blmsp.fritz.box ([2001:4090:a246:80e3:766f:be78:d79a:8686]) by smtp.gmail.com with ESMTPSA id l6-20020adfe586000000b0031416362e23sm5013681wrm.3.2023.07.28.07.19.27 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 28 Jul 2023 07:19:28 -0700 (PDT) From: Markus Schneider-Pargmann To: Wolfgang Grandegger , Marc Kleine-Budde , Rob Herring , Krzysztof Kozlowski Cc: "David S . Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Conor Dooley , Chandrasekar Ramakrishnan , Michal Kubiak , Vivek Yadav , linux-can@vger.kernel.org, netdev@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, Simon Horman , Markus Schneider-Pargmann Subject: [PATCH v4 3/6] can: tcan4x5x: Check size of mram configuration Date: Fri, 28 Jul 2023 16:19:20 +0200 Message-Id: <20230728141923.162477-4-msp@baylibre.com> X-Mailer: git-send-email 2.40.1 In-Reply-To: <20230728141923.162477-1-msp@baylibre.com> References: <20230728141923.162477-1-msp@baylibre.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" To reduce debugging effort in case the mram is misconfigured, add this size check of the DT configuration. Currently if the mram configuration doesn't fit into the available MRAM it just overwrites other areas of the MRAM. Signed-off-by: Markus Schneider-Pargmann Reviewed-by: Michal Kubiak --- drivers/net/can/m_can/m_can.c | 16 ++++++++++++++++ drivers/net/can/m_can/m_can.h | 1 + drivers/net/can/m_can/tcan4x5x-core.c | 5 +++++ 3 files changed, 22 insertions(+) diff --git a/drivers/net/can/m_can/m_can.c b/drivers/net/can/m_can/m_can.c index c5af92bcc9c9..9210cf0705a1 100644 --- a/drivers/net/can/m_can/m_can.c +++ b/drivers/net/can/m_can/m_can.c @@ -1887,6 +1887,22 @@ static int register_m_can_dev(struct net_device *dev) return register_candev(dev); } =20 +int m_can_check_mram_cfg(struct m_can_classdev *cdev, u32 mram_max_size) +{ + u32 total_size; + + total_size =3D cdev->mcfg[MRAM_TXB].off - cdev->mcfg[MRAM_SIDF].off + + cdev->mcfg[MRAM_TXB].num * TXB_ELEMENT_SIZE; + if (total_size > mram_max_size) { + dev_err(cdev->dev, "Total size of mram config(%u) exceeds mram(%u)\n", + total_size, mram_max_size); + return -EINVAL; + } + + return 0; +} +EXPORT_SYMBOL_GPL(m_can_check_mram_cfg); + static void m_can_of_parse_mram(struct m_can_classdev *cdev, const u32 *mram_config_vals) { diff --git a/drivers/net/can/m_can/m_can.h b/drivers/net/can/m_can/m_can.h index a839dc71dc9b..d8150d8128e7 100644 --- a/drivers/net/can/m_can/m_can.h +++ b/drivers/net/can/m_can/m_can.h @@ -101,6 +101,7 @@ int m_can_class_register(struct m_can_classdev *cdev); void m_can_class_unregister(struct m_can_classdev *cdev); int m_can_class_get_clocks(struct m_can_classdev *cdev); int m_can_init_ram(struct m_can_classdev *priv); +int m_can_check_mram_cfg(struct m_can_classdev *cdev, u32 mram_max_size); =20 int m_can_class_suspend(struct device *dev); int m_can_class_resume(struct device *dev); diff --git a/drivers/net/can/m_can/tcan4x5x-core.c b/drivers/net/can/m_can/= tcan4x5x-core.c index 2342aa011647..e706518176e4 100644 --- a/drivers/net/can/m_can/tcan4x5x-core.c +++ b/drivers/net/can/m_can/tcan4x5x-core.c @@ -80,6 +80,7 @@ TCAN4X5X_MCAN_IR_RF1F) =20 #define TCAN4X5X_MRAM_START 0x8000 +#define TCAN4X5X_MRAM_SIZE 0x800 #define TCAN4X5X_MCAN_OFFSET 0x1000 =20 #define TCAN4X5X_CLEAR_ALL_INT 0xffffffff @@ -307,6 +308,10 @@ static int tcan4x5x_can_probe(struct spi_device *spi) if (!mcan_class) return -ENOMEM; =20 + ret =3D m_can_check_mram_cfg(mcan_class, TCAN4X5X_MRAM_SIZE); + if (ret) + goto out_m_can_class_free_dev; + priv =3D cdev_to_priv(mcan_class); =20 priv->power =3D devm_regulator_get_optional(&spi->dev, "vsup"); --=20 2.40.1 From nobody Sat Feb 7 17:42:02 2026 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 C3CC4C001DE for ; Fri, 28 Jul 2023 14:20:53 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235144AbjG1OUw (ORCPT ); Fri, 28 Jul 2023 10:20:52 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44390 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S237006AbjG1OTd (ORCPT ); Fri, 28 Jul 2023 10:19:33 -0400 Received: from mail-wm1-x32a.google.com (mail-wm1-x32a.google.com [IPv6:2a00:1450:4864:20::32a]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 8D7713ABA for ; Fri, 28 Jul 2023 07:19:31 -0700 (PDT) Received: by mail-wm1-x32a.google.com with SMTP id 5b1f17b1804b1-3fe078dcc3aso7492695e9.2 for ; Fri, 28 Jul 2023 07:19:31 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=baylibre-com.20221208.gappssmtp.com; s=20221208; t=1690553970; x=1691158770; 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=tK3XW9CvIKNotY0VMKRibuYSfqNfjSdewyrI1jRS2zM=; b=c7iw206NmNGXQD51dyCTfjKcxUDG5tZ5kJQD2+JAaW4M6K4d4qsYEkIRe9WdL7qtmU xJLPDNDokcsQGomwHemsFPimM7eQAPctRh4pOVsJlChdD4ayKSNiBmSQJBEyzJnc3nBL qbJOMF4ro31jIVEvfxr2c1suQK7+xMStzu8Kq5cPkiSBTqFyNHsquGLDbNwsyM3eFne0 YUtZ/LQsQjWolMIoRmkohkvQ1sa112UoCnUGsWavlCW+fQvnFXm7p4kMN7bPNSoQCv6X fZTq3/5CLSNH5tRBuCV9QVzM8VSzVhY2q/3nqZDfapW5IfIRPDRXvVDmOXYCbORy97IU 3u6g== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1690553970; x=1691158770; 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=tK3XW9CvIKNotY0VMKRibuYSfqNfjSdewyrI1jRS2zM=; b=YkyJsTaPtX7HCUsFiB7uJx18/berVpVdDmlrVIspuwnm3y3No6LRzfPtYG65mwcawG W2dyGH+v4R4c2T2CfmkNnYrLD9GEatU8iIz+yzel/GGIj2RX+CPPpgXtBzQwMjWfne8N ipE2crSbnck2LScDYH4hR57tRooYDubER3ql42kGEYFcCrqruYmOltOQmibDsxXUHkkP PLiW/9qO0VFtExZDUfrynKWNFLJ/UsOXvqsPWAMy3i6P2fZchqztD79NajO9xwQM1jfB VKymA+DYXob0UMqeMCNaSJhPEVu2NlIvlAbEJTAWCgIUPi4Y6SjE2yR4Qys5AaHEGZ1V JtaQ== X-Gm-Message-State: ABy/qLYjtAoZwCpq+uUoIpoOJr8eHJoau5TS5hfzQDFbSOzgzSIXzDyI I1m8pIzWp02LLmVH7rVgG5JLCA== X-Google-Smtp-Source: APBJJlFs7imRnBEtCs6iYDPuFHgy5C9OPLlOXwI/YIhw8iAEpaIG1yV7BAqgPEz424UL52Nd4O+l1g== X-Received: by 2002:a05:600c:20f:b0:3fe:785:ac0b with SMTP id 15-20020a05600c020f00b003fe0785ac0bmr1757369wmi.5.1690553969966; Fri, 28 Jul 2023 07:19:29 -0700 (PDT) Received: from blmsp.fritz.box ([2001:4090:a246:80e3:766f:be78:d79a:8686]) by smtp.gmail.com with ESMTPSA id l6-20020adfe586000000b0031416362e23sm5013681wrm.3.2023.07.28.07.19.28 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 28 Jul 2023 07:19:29 -0700 (PDT) From: Markus Schneider-Pargmann To: Wolfgang Grandegger , Marc Kleine-Budde , Rob Herring , Krzysztof Kozlowski Cc: "David S . Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Conor Dooley , Chandrasekar Ramakrishnan , Michal Kubiak , Vivek Yadav , linux-can@vger.kernel.org, netdev@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, Simon Horman , Markus Schneider-Pargmann Subject: [PATCH v4 4/6] can: tcan4x5x: Rename ID registers to match datasheet Date: Fri, 28 Jul 2023 16:19:21 +0200 Message-Id: <20230728141923.162477-5-msp@baylibre.com> X-Mailer: git-send-email 2.40.1 In-Reply-To: <20230728141923.162477-1-msp@baylibre.com> References: <20230728141923.162477-1-msp@baylibre.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" The datasheet calls these registers ID1 and ID2. Rename these to avoid confusion. Signed-off-by: Markus Schneider-Pargmann Reviewed-by: Michal Kubiak --- drivers/net/can/m_can/tcan4x5x-core.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/net/can/m_can/tcan4x5x-core.c b/drivers/net/can/m_can/= tcan4x5x-core.c index e706518176e4..fb9375fa20ec 100644 --- a/drivers/net/can/m_can/tcan4x5x-core.c +++ b/drivers/net/can/m_can/tcan4x5x-core.c @@ -6,8 +6,8 @@ =20 #define TCAN4X5X_EXT_CLK_DEF 40000000 =20 -#define TCAN4X5X_DEV_ID0 0x00 -#define TCAN4X5X_DEV_ID1 0x04 +#define TCAN4X5X_DEV_ID1 0x00 +#define TCAN4X5X_DEV_ID2 0x04 #define TCAN4X5X_REV 0x08 #define TCAN4X5X_STATUS 0x0C #define TCAN4X5X_ERROR_STATUS_MASK 0x10 --=20 2.40.1 From nobody Sat Feb 7 17:42:02 2026 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 74B24C001DE for ; Fri, 28 Jul 2023 14:19:58 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S237046AbjG1OT5 (ORCPT ); Fri, 28 Jul 2023 10:19:57 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44506 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S237023AbjG1OTg (ORCPT ); Fri, 28 Jul 2023 10:19:36 -0400 Received: from mail-wm1-x334.google.com (mail-wm1-x334.google.com [IPv6:2a00:1450:4864:20::334]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E7CC43C1D for ; Fri, 28 Jul 2023 07:19:32 -0700 (PDT) Received: by mail-wm1-x334.google.com with SMTP id 5b1f17b1804b1-3fe110de3b6so3654435e9.1 for ; Fri, 28 Jul 2023 07:19:32 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=baylibre-com.20221208.gappssmtp.com; s=20221208; t=1690553971; x=1691158771; 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=SrC0OKi8JQYuMqsO21AINU5+pXiu6nr1MLw9iKQGNsE=; b=Njf1k3Dw1JnWXqAlS0uxomasFTfTjz8A0pR0+lJt22KaXxeFtfpz6KSOih9jvn3p1S tSMleG2oHnw28yFKwbG9OlMvXdPTby6C1X4HumZn6p5uRoYF5vHZ6/4FfRP5KjHSMnV7 tTbRGpVQ6lP4UjwKIL4Fc/nHQhQX1uvqCt/s2CPL3vrl5jfV0MZ0+WTB4/rtEdPBHDxt 7hqZhXfh9Zqn5gqkBZAGNWRXKEXAn6Wj7uK8yvB/94thAI3tMgPb/c1DTLF83sHk0HGd p8puJwiaYDH+cz5q4EFjXtpnPp2pyvkHCL6UMwHdh30gIJlrcI/UjYr9b+Bv3rHz2nJu aIgA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1690553971; x=1691158771; 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=SrC0OKi8JQYuMqsO21AINU5+pXiu6nr1MLw9iKQGNsE=; b=Q+Euq+aTvFCWHi8OdRLuOa6lGaErNaJZ0b8iVYEnlpesAVloPB+/w8pLSSmSEsuhw1 XyNWkOLRCjjUFlAfC2cg4bZI0DKcvS2NlKGbzL9uNhsYhZLl/AS730MHg2LCR8QVItBg E1vaCDlVzE/XMeM3FMNkYSyy7sEuYKSu6HwFVqSSlx/yqu1u3wUaLodjA9xjR7eUQob3 3vPyHgrj4y9xSqUIds3JgcxfBoHQuQQQNnz5IcsD0YmBiwzsHOregebTC0dWe2nmk5h7 mvtKSfYDdjlD2FYU5eNhkP9Gmr5aF5DItC7QYXtCFpfaghVtH1rhQRWX3dh6ufBgJp56 XZrQ== X-Gm-Message-State: ABy/qLbE7MKk7bWFMP/6cH2TM2ECGPiN3nTeGvn/r3jm/hVQx8tzXx9l Zt6HCSygpFxMJ28SFoCAyHpxLQ== X-Google-Smtp-Source: APBJJlFuLM2DH0+UxviTLjYcp2wsiH3LATToUTFsM92nehZlX3Kl8YHTFG3I9+s+bQf31HtkFTifjw== X-Received: by 2002:a05:600c:b5a:b0:3fb:4064:7e22 with SMTP id k26-20020a05600c0b5a00b003fb40647e22mr2261067wmr.19.1690553970873; Fri, 28 Jul 2023 07:19:30 -0700 (PDT) Received: from blmsp.fritz.box ([2001:4090:a246:80e3:766f:be78:d79a:8686]) by smtp.gmail.com with ESMTPSA id l6-20020adfe586000000b0031416362e23sm5013681wrm.3.2023.07.28.07.19.30 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 28 Jul 2023 07:19:30 -0700 (PDT) From: Markus Schneider-Pargmann To: Wolfgang Grandegger , Marc Kleine-Budde , Rob Herring , Krzysztof Kozlowski Cc: "David S . Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Conor Dooley , Chandrasekar Ramakrishnan , Michal Kubiak , Vivek Yadav , linux-can@vger.kernel.org, netdev@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, Simon Horman , Markus Schneider-Pargmann Subject: [PATCH v4 5/6] can: tcan4x5x: Add support for tcan4552/4553 Date: Fri, 28 Jul 2023 16:19:22 +0200 Message-Id: <20230728141923.162477-6-msp@baylibre.com> X-Mailer: git-send-email 2.40.1 In-Reply-To: <20230728141923.162477-1-msp@baylibre.com> References: <20230728141923.162477-1-msp@baylibre.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" tcan4552 and tcan4553 do not have wake or state pins, so they are currently not compatible with the generic driver. The generic driver uses tcan4x5x_disable_state() and tcan4x5x_disable_wake() if the gpios are not defined. These functions use register bits that are not available in tcan4552/4553. This patch adds support by introducing version information to reflect if the chip has wake and state pins. Also the version is now checked. Signed-off-by: Markus Schneider-Pargmann --- drivers/net/can/m_can/tcan4x5x-core.c | 104 ++++++++++++++++++++++---- 1 file changed, 90 insertions(+), 14 deletions(-) diff --git a/drivers/net/can/m_can/tcan4x5x-core.c b/drivers/net/can/m_can/= tcan4x5x-core.c index fb9375fa20ec..2d329b4e4f52 100644 --- a/drivers/net/can/m_can/tcan4x5x-core.c +++ b/drivers/net/can/m_can/tcan4x5x-core.c @@ -7,6 +7,7 @@ #define TCAN4X5X_EXT_CLK_DEF 40000000 =20 #define TCAN4X5X_DEV_ID1 0x00 +#define TCAN4X5X_DEV_ID1_TCAN 0x4e414354 /* ASCII TCAN */ #define TCAN4X5X_DEV_ID2 0x04 #define TCAN4X5X_REV 0x08 #define TCAN4X5X_STATUS 0x0C @@ -103,6 +104,37 @@ #define TCAN4X5X_WD_3_S_TIMER BIT(29) #define TCAN4X5X_WD_6_S_TIMER (BIT(28) | BIT(29)) =20 +struct tcan4x5x_version_info { + const char *name; + u32 id2_register; + + bool has_wake_pin; + bool has_state_pin; +}; + +enum { + TCAN4552 =3D 0, + TCAN4553, + TCAN4X5X, +}; + +static const struct tcan4x5x_version_info tcan4x5x_versions[] =3D { + [TCAN4552] =3D { + .name =3D "4552", + .id2_register =3D 0x32353534, + }, + [TCAN4553] =3D { + .name =3D "4553", + .id2_register =3D 0x32353534, + }, + /* generic version with no id2_register at the end */ + [TCAN4X5X] =3D { + .name =3D "generic", + .has_wake_pin =3D true, + .has_state_pin =3D true, + }, +}; + static inline struct tcan4x5x_priv *cdev_to_priv(struct m_can_classdev *cd= ev) { return container_of(cdev, struct tcan4x5x_priv, cdev); @@ -254,18 +286,53 @@ static int tcan4x5x_disable_state(struct m_can_classd= ev *cdev) TCAN4X5X_DISABLE_INH_MSK, 0x01); } =20 -static int tcan4x5x_get_gpios(struct m_can_classdev *cdev) +static const struct tcan4x5x_version_info +*tcan4x5x_find_version(struct tcan4x5x_priv *priv) +{ + u32 val; + int ret; + + ret =3D regmap_read(priv->regmap, TCAN4X5X_DEV_ID1, &val); + if (ret) + return ERR_PTR(ret); + + if (val !=3D TCAN4X5X_DEV_ID1_TCAN) { + dev_err(&priv->spi->dev, "Not a tcan device %x\n", val); + return ERR_PTR(-ENODEV); + } + + ret =3D regmap_read(priv->regmap, TCAN4X5X_DEV_ID2, &val); + if (ret) + return ERR_PTR(ret); + + for (int i =3D 0; i !=3D ARRAY_SIZE(tcan4x5x_versions); ++i) { + const struct tcan4x5x_version_info *vinfo =3D &tcan4x5x_versions[i]; + + if (!vinfo->id2_register || val =3D=3D vinfo->id2_register) { + dev_info(&priv->spi->dev, "Detected TCAN device version %s\n", + vinfo->name); + return vinfo; + } + } + + return &tcan4x5x_versions[TCAN4X5X]; +} + +static int tcan4x5x_get_gpios(struct m_can_classdev *cdev, + const struct tcan4x5x_version_info *version_info) { struct tcan4x5x_priv *tcan4x5x =3D cdev_to_priv(cdev); int ret; =20 - tcan4x5x->device_wake_gpio =3D devm_gpiod_get(cdev->dev, "device-wake", - GPIOD_OUT_HIGH); - if (IS_ERR(tcan4x5x->device_wake_gpio)) { - if (PTR_ERR(tcan4x5x->device_wake_gpio) =3D=3D -EPROBE_DEFER) - return -EPROBE_DEFER; + if (version_info->has_wake_pin) { + tcan4x5x->device_wake_gpio =3D devm_gpiod_get(cdev->dev, "device-wake", + GPIOD_OUT_HIGH); + if (IS_ERR(tcan4x5x->device_wake_gpio)) { + if (PTR_ERR(tcan4x5x->device_wake_gpio) =3D=3D -EPROBE_DEFER) + return -EPROBE_DEFER; =20 - tcan4x5x_disable_wake(cdev); + tcan4x5x_disable_wake(cdev); + } } =20 tcan4x5x->reset_gpio =3D devm_gpiod_get_optional(cdev->dev, "reset", @@ -277,12 +344,14 @@ static int tcan4x5x_get_gpios(struct m_can_classdev *= cdev) if (ret) return ret; =20 - tcan4x5x->device_state_gpio =3D devm_gpiod_get_optional(cdev->dev, - "device-state", - GPIOD_IN); - if (IS_ERR(tcan4x5x->device_state_gpio)) { - tcan4x5x->device_state_gpio =3D NULL; - tcan4x5x_disable_state(cdev); + if (version_info->has_state_pin) { + tcan4x5x->device_state_gpio =3D devm_gpiod_get_optional(cdev->dev, + "device-state", + GPIOD_IN); + if (IS_ERR(tcan4x5x->device_state_gpio)) { + tcan4x5x->device_state_gpio =3D NULL; + tcan4x5x_disable_state(cdev); + } } =20 return 0; @@ -299,6 +368,7 @@ static struct m_can_ops tcan4x5x_ops =3D { =20 static int tcan4x5x_can_probe(struct spi_device *spi) { + const struct tcan4x5x_version_info *version_info; struct tcan4x5x_priv *priv; struct m_can_classdev *mcan_class; int freq, ret; @@ -361,7 +431,13 @@ static int tcan4x5x_can_probe(struct spi_device *spi) if (ret) goto out_m_can_class_free_dev; =20 - ret =3D tcan4x5x_get_gpios(mcan_class); + version_info =3D tcan4x5x_find_version(priv); + if (IS_ERR(version_info)) { + ret =3D PTR_ERR(version_info); + goto out_power; + } + + ret =3D tcan4x5x_get_gpios(mcan_class, version_info); if (ret) goto out_power; =20 --=20 2.40.1 From nobody Sat Feb 7 17:42:02 2026 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 6ABFBC04A6A for ; Fri, 28 Jul 2023 14:19:55 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S237026AbjG1OTy (ORCPT ); Fri, 28 Jul 2023 10:19:54 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44406 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S237021AbjG1OTg (ORCPT ); Fri, 28 Jul 2023 10:19:36 -0400 Received: from mail-wr1-x431.google.com (mail-wr1-x431.google.com [IPv6:2a00:1450:4864:20::431]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 8B1243C29 for ; Fri, 28 Jul 2023 07:19:33 -0700 (PDT) Received: by mail-wr1-x431.google.com with SMTP id ffacd0b85a97d-314172bac25so2076302f8f.3 for ; Fri, 28 Jul 2023 07:19:33 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=baylibre-com.20221208.gappssmtp.com; s=20221208; t=1690553972; x=1691158772; 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=giuTVJOpvmU1j6SJtXvrs5HolX4CC90ajhkJHQ0pjgw=; b=GrtnL7/fM1SgKRl6fxfIk1pgHVZc0FLNnQTNXNMpxFHXajx2rXR3OjONZAlZAyreCW wS0ZA56RjkbAQzV8dIXlnRLIgoKTDUHRohsAmJAfzMuVkjr5Eksf9+y24egs7pWkz1Lt t6aWo+pYRTaeAVlx7aJyRoDnL18L8ci+c0IkUlTPPt30Grj5WLBSNu/++YOtqK/AV7FR 9AujkEv8QZrtBVNklyS4rjjO33pUWkVGZt9xTwemXM3VcFrc2pmM0EiFIJ173U7bccTe df3kQRxZyHLxaduu/v6G27VyPG8qfOPqqqKdg5koRtkWD54WPU55vPL1pHXtI8X+BVMr W/bw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1690553972; x=1691158772; 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=giuTVJOpvmU1j6SJtXvrs5HolX4CC90ajhkJHQ0pjgw=; b=buZPkLTO2WXDd5AvDUO7w/VAM1iCQa+kfnOPzdJr7rIJmhmwQvDNSIc6ybyJ5D/gXZ zPXHoMImWJZ46QsUyfjYhrLhZ280xDd4+Kv7P/esmFIeHJf/guLAvIuPGvRDMoGUO3j/ LTCa8aFja80AKdH4WIOCwIu8lIbdOf2x2oJSlBJCO6lGCfCdRAiHTDxWM+/WtET0zzw8 O30873haAHvzmVdpba6+7TsE70RGxKXTqcW3R8ZKlMvRUwJAmuAGSVmQgj/1BA2xWd+/ IiB4zSvraTnp3ZiwflFmOfPVAaQL42PrXpaX9C3zP9iewg7bRILuaGq7hKhSKcdDa26n Ac7Q== X-Gm-Message-State: ABy/qLbCjklCxJJQ3+n3381lavk7CgqLOsOB+Ip+DKp2B5OqzFiphJ1J uijGoIpkCHq0VIPgRO8FRO/m7w== X-Google-Smtp-Source: APBJJlEjiAZn1StP/CczL78boawHSDHTP+/5VlogrBFTZtZZTRb0ONZC3/06apTOOVB9xk0UI4TTYg== X-Received: by 2002:a5d:6849:0:b0:313:f347:eea0 with SMTP id o9-20020a5d6849000000b00313f347eea0mr1951153wrw.60.1690553971785; Fri, 28 Jul 2023 07:19:31 -0700 (PDT) Received: from blmsp.fritz.box ([2001:4090:a246:80e3:766f:be78:d79a:8686]) by smtp.gmail.com with ESMTPSA id l6-20020adfe586000000b0031416362e23sm5013681wrm.3.2023.07.28.07.19.31 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 28 Jul 2023 07:19:31 -0700 (PDT) From: Markus Schneider-Pargmann To: Wolfgang Grandegger , Marc Kleine-Budde , Rob Herring , Krzysztof Kozlowski Cc: "David S . Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Conor Dooley , Chandrasekar Ramakrishnan , Michal Kubiak , Vivek Yadav , linux-can@vger.kernel.org, netdev@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, Simon Horman , Markus Schneider-Pargmann Subject: [PATCH v4 6/6] can: tcan4x5x: Add error messages in probe Date: Fri, 28 Jul 2023 16:19:23 +0200 Message-Id: <20230728141923.162477-7-msp@baylibre.com> X-Mailer: git-send-email 2.40.1 In-Reply-To: <20230728141923.162477-1-msp@baylibre.com> References: <20230728141923.162477-1-msp@baylibre.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" To be able to understand issues during probe easier, add error messages if something fails. Signed-off-by: Markus Schneider-Pargmann --- drivers/net/can/m_can/tcan4x5x-core.c | 29 +++++++++++++++++++++------ 1 file changed, 23 insertions(+), 6 deletions(-) diff --git a/drivers/net/can/m_can/tcan4x5x-core.c b/drivers/net/can/m_can/= tcan4x5x-core.c index 2d329b4e4f52..8a4143809d33 100644 --- a/drivers/net/can/m_can/tcan4x5x-core.c +++ b/drivers/net/can/m_can/tcan4x5x-core.c @@ -402,6 +402,8 @@ static int tcan4x5x_can_probe(struct spi_device *spi) =20 /* Sanity check */ if (freq < 20000000 || freq > TCAN4X5X_EXT_CLK_DEF) { + dev_err(&spi->dev, "Clock frequency is out of supported range %d\n", + freq); ret =3D -ERANGE; goto out_m_can_class_free_dev; } @@ -420,16 +422,23 @@ static int tcan4x5x_can_probe(struct spi_device *spi) /* Configure the SPI bus */ spi->bits_per_word =3D 8; ret =3D spi_setup(spi); - if (ret) + if (ret) { + dev_err(&spi->dev, "SPI setup failed %pe\n", ERR_PTR(ret)); goto out_m_can_class_free_dev; + } =20 ret =3D tcan4x5x_regmap_init(priv); - if (ret) + if (ret) { + dev_err(&spi->dev, "regmap init failed %pe\n", ERR_PTR(ret)); goto out_m_can_class_free_dev; + } =20 ret =3D tcan4x5x_power_enable(priv->power, 1); - if (ret) + if (ret) { + dev_err(&spi->dev, "Enabling regulator failed %pe\n", + ERR_PTR(ret)); goto out_m_can_class_free_dev; + } =20 version_info =3D tcan4x5x_find_version(priv); if (IS_ERR(version_info)) { @@ -438,16 +447,24 @@ static int tcan4x5x_can_probe(struct spi_device *spi) } =20 ret =3D tcan4x5x_get_gpios(mcan_class, version_info); - if (ret) + if (ret) { + dev_err(&spi->dev, "Getting gpios failed %pe\n", ERR_PTR(ret)); goto out_power; + } =20 ret =3D tcan4x5x_init(mcan_class); - if (ret) + if (ret) { + dev_err(&spi->dev, "tcan initialization failed %pe\n", + ERR_PTR(ret)); goto out_power; + } =20 ret =3D m_can_class_register(mcan_class); - if (ret) + if (ret) { + dev_err(&spi->dev, "Failed registering m_can device %pe\n", + ERR_PTR(ret)); goto out_power; + } =20 netdev_info(mcan_class->net, "TCAN4X5X successfully initialized.\n"); return 0; --=20 2.40.1