From patchwork Mon May 10 05:10:02 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Aswath Govindraju X-Patchwork-Id: 12246859 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-12.4 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id EFF0FC433ED for ; Mon, 10 May 2021 05:10:40 +0000 (UTC) Received: from desiato.infradead.org (desiato.infradead.org [90.155.92.199]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 452BF61432 for ; Mon, 10 May 2021 05:10:40 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 452BF61432 Authentication-Results: mail.kernel.org; dmarc=fail (p=quarantine dis=none) header.from=ti.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-phy-bounces+linux-phy=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=desiato.20200630; h=Sender:Content-Transfer-Encoding :Content-Type:List-Subscribe:List-Help:List-Post:List-Archive: List-Unsubscribe:List-Id:MIME-Version:Message-ID:Date:Subject:CC:To:From: Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From:Resent-Sender :Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:References:List-Owner; bh=sQOo3iPc41dP4E4pSvl1lKg9nzrUpUFd8oiC9hrm4Xc=; b=P6JvkDbqAXJcYXbFo2rVp5ob6C agBwpFc1g8gZlsGU+5TdrwEkV0s7cJeIa5g9ABzweCyy6QKdlsJsmyWYhbN/yQ/gviU6A94kuWP/w QrP48CGlShDjLrc9s43PrLdopRjOhfTgwYKUFI5OTOL2Rw4qgyJHveseXAkRt9Tcdq6dUI7qwUolT DcPz+pnzKgCwCgAmDcnQJik40ngtIuq5DPtt52Q+WzbP6DaOmPMDTQZ2phRpGySx5yalwk2veAvXU 80iyryvW3Mq1v/IV56iKs/UNfz6p4Yk1Gyw00EssFYQA6Y3HZsd1nkiSHC/UI/2a4kgUaENKsjkoF nwh7jkiA==; Received: from localhost ([::1] helo=desiato.infradead.org) by desiato.infradead.org with esmtp (Exim 4.94 #2 (Red Hat Linux)) id 1lfyBi-00DAy4-1r; Mon, 10 May 2021 05:10:38 +0000 Received: from bombadil.infradead.org ([2607:7c80:54:e::133]) by desiato.infradead.org with esmtps (Exim 4.94 #2 (Red Hat Linux)) id 1lfyBf-00DAxo-Qo for linux-phy@desiato.infradead.org; Mon, 10 May 2021 05:10:36 +0000 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20210309; h=Content-Type:MIME-Version:Message-ID: Date:Subject:CC:To:From:Sender:Reply-To:Content-Transfer-Encoding:Content-ID: Content-Description:In-Reply-To:References; bh=ZzDIovFyQLRHuyRfFSt9PbywYQnhkAHpLtYfN8kEak0=; b=MOe+I/s1JCLHmMuLbUIPmH/7V7 Y56TJ+DIBWaRJV2qQvbEO94qZMWns0CU29PA+hQbQqFBUBhSIvkxRnJqe1sP1XuQ5ftZpbNWh+103 qPLirGXAyEqxh6TX7ExI9pG2S4dCZmVS7K65u4caw72l16cH8DPflW6XysbprzfULKiYFYbAvT0aU OgjldCzz/jPt9XNlTxLCnVxCYGA+IOcGpvvnJFD1xP748MLYMOzg3+wQSkRd5VJ5P0l9XBBdPkC0/ CwdST7L4dW9IeebGJzkPtcWwvpaLd8ZDuj0RTu8ofcHY/ShuhyO4mKH/EoJD9Qe4dtLdA6LHnic6a YdVRpEcA==; Received: from fllv0016.ext.ti.com ([198.47.19.142]) by bombadil.infradead.org with esmtps (Exim 4.94 #2 (Red Hat Linux)) id 1lfyBa-008IIf-NK for linux-phy@lists.infradead.org; Mon, 10 May 2021 05:10:34 +0000 Received: from fllv0035.itg.ti.com ([10.64.41.0]) by fllv0016.ext.ti.com (8.15.2/8.15.2) with ESMTP id 14A5AKAs080845; Mon, 10 May 2021 00:10:20 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ti.com; s=ti-com-17Q1; t=1620623420; bh=ZzDIovFyQLRHuyRfFSt9PbywYQnhkAHpLtYfN8kEak0=; h=From:To:CC:Subject:Date; b=DYhOpvbXI4rzW/HZwK1ERmHz71iMNJ6eOc0ObhHcNT8drec17TCbwm87ssp6n99Z7 l7DfkQz1mZzmyLVgZcD0zC2vAw7xMO+vRCw2KEO7/jSF2+T/z5BaYfrKuPdwCTWbTn 5H5PnSAUr4eqe0yNG8sQ+ArBYKJG4XqvU1xY5fW0= Received: from DFLE112.ent.ti.com (dfle112.ent.ti.com [10.64.6.33]) by fllv0035.itg.ti.com (8.15.2/8.15.2) with ESMTPS id 14A5AKG6060617 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=FAIL); Mon, 10 May 2021 00:10:20 -0500 Received: from DFLE113.ent.ti.com (10.64.6.34) by DFLE112.ent.ti.com (10.64.6.33) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.2176.2; Mon, 10 May 2021 00:10:20 -0500 Received: from lelv0327.itg.ti.com (10.180.67.183) by DFLE113.ent.ti.com (10.64.6.34) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.2176.2 via Frontend Transport; Mon, 10 May 2021 00:10:20 -0500 Received: from gsaswath-HP-ProBook-640-G5.dal.design.ti.com (ileax41-snat.itg.ti.com [10.172.224.153]) by lelv0327.itg.ti.com (8.15.2/8.15.2) with ESMTP id 14A5A9nL113970; Mon, 10 May 2021 00:10:11 -0500 From: Aswath Govindraju To: CC: , Marc Kleine-Budde , Wolfgang Grandegger , Vignesh Raghavendra , Lokesh Vutla , Aswath Govindraju , Kishon Vijay Abraham I , Vinod Koul , Rob Herring , , , Subject: [PATCH v6 0/3] CAN TRANSCEIVER: Add support for CAN transceivers Date: Mon, 10 May 2021 10:40:02 +0530 Message-ID: <20210510051006.11393-1-a-govindraju@ti.com> X-Mailer: git-send-email 2.17.1 MIME-Version: 1.0 X-EXCLAIMER-MD-CONFIG: e1e8a2fd-e40a-4ac6-ac9b-f7e9cc9ee180 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210509_221030_919238_4ADF0EF2 X-CRM114-Status: GOOD ( 19.12 ) X-BeenThere: linux-phy@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: Linux Phy Mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-phy" Errors-To: linux-phy-bounces+linux-phy=archiver.kernel.org@lists.infradead.org The following series of patches add support for CAN transceivers. TCAN1042 has a standby signal that needs to be pulled high for sending/receiving messages[1]. TCAN1043 has a enable signal along with standby signal that needs to be pulled up for sending/receiving messages[2], and other combinations of the two lines can be used to put the transceiver in different states to reduce power consumption. On boards like the AM654-idk and J721e-evm these signals are controlled using gpios. Patch 1 rewords the comment that restricts max_link_rate attribute to have units of Mbps. Patch 2 models the transceiver as a phy device tree node with properties for max bit rate supported, gpio properties for indicating gpio pin numbers to which standby and enable signals are connected. Patch 2 adds a generic driver to support CAN transceivers. changes since v5: - Updated copyright year to 2021 in patch 3 - Rebased the series on top of latest linux next - picked-up Marc Kleine-Budde's acked-by changes since v4: - In patch 3 made the correction from mcan to CAN, in Kconfig help changes since v3: - dropped patch 2(in v3) - changed the node name property in patch 3(in v3) - picked up Rob Herring's reviewed-by for patch 3(in v3) changes since v2: - dropped 5 and 6 patches and to be sent via linux-can-next - added static keyword for can_transceiver_phy_probe() - changed enable gpio example to active high in patch 3 - Rearranged the file names in alphabetical order in Makefile and MAINTAINERS file changes since v1: - Added patch 1 (in v2) that rewords the comment that restrict max_link_rate attribute to have units of Mbps. - Added patch 2 (in v2) that adds an API for devm_of_phy_optional_get_by_index - Patch 1 (in v1) - updated MAINTAINERS file - Patch 2 (in v1) - replaced m_can with CAN to make the driver independent of CAN driver - Added prefix CAN_TRANSCEIVER for EN_PRESENT and STB_PRESENT - Added new line before return statements in power_on() and power_off - Added error handling patch for devm_kzalloc() - used the max_link_rate attribute directly instead of dividing it by 1000000 - removed the spaces before GPIOD_OUT_LOW in devm_gpiod_get() - Corrected requested value for standby-gpios to GPIOD_OUT_HIGH - Updated MAINTAINERS file - Patch 3 (in v1) - replaced minItems with maxItems - Removed phy-names property as there is only one phy - Patch 4 (in v1) - replaced dev_warn with dev_info when no transceiver is found - Added struct phy * field in m_can_classdev struct - moved phy_power_on and phy_power_off to m_can_open and m_can_close respectively - Moved the check for max_bit_rate to generice transceiver driver [1] - https://www.ti.com/lit/ds/symlink/tcan1042h.pdf [2] - https://www.ti.com/lit/ds/symlink/tcan1043-q1.pdf Aswath Govindraju (3): phy: core: Reword the comment specifying the units of max_link_rate to be Mbps dt-bindings: phy: Add binding for TI TCAN104x CAN transceivers phy: phy-can-transceiver: Add support for generic CAN transceiver driver .../bindings/phy/ti,tcan104x-can.yaml | 56 +++++++ MAINTAINERS | 2 + drivers/phy/Kconfig | 9 ++ drivers/phy/Makefile | 1 + drivers/phy/phy-can-transceiver.c | 146 ++++++++++++++++++ include/linux/phy/phy.h | 2 +- 6 files changed, 215 insertions(+), 1 deletion(-) create mode 100644 Documentation/devicetree/bindings/phy/ti,tcan104x-can.yaml create mode 100644 drivers/phy/phy-can-transceiver.c