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When I2C device with 10 bit address is defined in DT, I3C master registration fails. Signed-off-by: Przemyslaw Gaj --- Main changes between v1 and v2 are: - Add error message when registering I2C device with 10 bit address. --- drivers/i3c/master.c | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/drivers/i3c/master.c b/drivers/i3c/master.c index 2dc628d..8c1e365 100644 --- a/drivers/i3c/master.c +++ b/drivers/i3c/master.c @@ -1962,6 +1962,15 @@ of_i3c_master_add_i2c_boardinfo(struct i3c_master_controller *master, if (ret) return ret; + /* The I3C Specification does not clearly say I2C devices with 10-bit + * address are supported. These devices can't be passed properly through + * DEFSLVS command. + */ + if (boardinfo->base.flags & I2C_CLIENT_TEN) { + dev_err(&master->dev, "I2C device with 10 bit address not supported."); + return -ENOTSUPP; + } + /* LVR is encoded in reg[2]. */ boardinfo->lvr = reg[2]; From patchwork Tue Feb 26 14:28:45 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: =?utf-8?q?Przemys=C5=82aw_Gaj?= X-Patchwork-Id: 10830359 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 8CE161669 for ; Tue, 26 Feb 2019 14:29:11 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 76FB12A0AC for ; Tue, 26 Feb 2019 14:29:11 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 6AB7F2A250; Tue, 26 Feb 2019 14:29:11 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.2 required=2.0 tests=BAD_ENC_HEADER,BAYES_00, DKIM_SIGNED,DKIM_VALID,MAILING_LIST_MULTI,RCVD_IN_DNSWL_MED autolearn=ham version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 162712A0AC for ; 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Signed-off-by: Przemyslaw Gaj --- drivers/i3c/master/i3c-master-cdns.c | 4 +--- 1 file changed, 1 insertion(+), 3 deletions(-) diff --git a/drivers/i3c/master/i3c-master-cdns.c b/drivers/i3c/master/i3c-master-cdns.c index 8889a4f..1797fbf 100644 --- a/drivers/i3c/master/i3c-master-cdns.c +++ b/drivers/i3c/master/i3c-master-cdns.c @@ -1010,9 +1010,7 @@ static int cdns_i3c_master_attach_i2c_dev(struct i2c_dev_desc *dev) master->free_rr_slots &= ~BIT(slot); i2c_dev_set_master_data(dev, data); - writel(prepare_rr0_dev_address(dev->boardinfo->base.addr) | - (dev->boardinfo->base.flags & I2C_CLIENT_TEN ? - DEV_ID_RR0_LVR_EXT_ADDR : 0), + writel(prepare_rr0_dev_address(dev->boardinfo->base.addr), master->regs + DEV_ID_RR0(data->id)); writel(dev->boardinfo->lvr, master->regs + DEV_ID_RR2(data->id)); writel(readl(master->regs + DEVS_CTRL) | From patchwork Tue Feb 26 14:28:46 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: =?utf-8?q?Przemys=C5=82aw_Gaj?= X-Patchwork-Id: 10830357 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 864C513B5 for ; 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Tue, 26 Feb 2019 14:28:59 GMT From: Przemyslaw Gaj To: Subject: [PATCH v2 3/3] dt-bindings: i3c: Document dropped support for I2C 10 bit devices Date: Tue, 26 Feb 2019 14:28:46 +0000 Message-ID: <20190226142846.28294-4-pgaj@cadence.com> X-Mailer: git-send-email 2.8.3 In-Reply-To: <20190226142846.28294-1-pgaj@cadence.com> References: <20190226142846.28294-1-pgaj@cadence.com> MIME-Version: 1.0 X-OrganizationHeadersPreserved: maileu3.global.cadence.com X-EOPAttributedMessage: 0 X-Forefront-Antispam-Report: CIP:158.140.1.28; IPV:CAL; SCL:-1; CTRY:US; EFV:NLI; SFV:NSPM; SFS:(10009020)(376002)(39860400002)(396003)(136003)(346002)(2980300002)(189003)(199004)(36092001)(126002)(476003)(426003)(446003)(11346002)(2616005)(336012)(87636003)(1076003)(26005)(478600001)(26826003)(186003)(36756003)(51416003)(5660300002)(4744005)(486006)(107886003)(76176011)(4326008)(50466002)(48376002)(246002)(2351001)(305945005)(106466001)(14444005)(2906002)(16586007)(54906003)(356004)(6666004)(8936002)(8676002)(50226002)(316002)(42186006)(47776003)(6916009)(86362001)(7636002)(105596002); 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Signed-off-by: Przemyslaw Gaj --- Documentation/devicetree/bindings/i3c/i3c.txt | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/Documentation/devicetree/bindings/i3c/i3c.txt b/Documentation/devicetree/bindings/i3c/i3c.txt index ab729a0..4ffe059 100644 --- a/Documentation/devicetree/bindings/i3c/i3c.txt +++ b/Documentation/devicetree/bindings/i3c/i3c.txt @@ -39,7 +39,9 @@ valid here, but several new properties have been added. New constraint on existing properties: -------------------------------------- - reg: contains 3 cells - + first cell : still encoding the I2C address + + first cell : still encoding the I2C address. 10 bit addressing is not + supported. Devices with 10 bit address can't be properly passed through + DEFSLVS command. + second cell: shall be 0