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Tue, 26 Feb 2019 14:28:56 GMT From: Przemyslaw Gaj To: Subject: [PATCH v2 1/3] i3c: Drop support for I2C 10 bit addresing Date: Tue, 26 Feb 2019 14:28:44 +0000 Message-ID: <20190226142846.28294-2-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)(346002)(396003)(136003)(39860400002)(376002)(2980300002)(189003)(199004)(36092001)(316002)(50226002)(1076003)(305945005)(7636002)(42186006)(50466002)(48376002)(16586007)(4326008)(6916009)(47776003)(8676002)(246002)(107886003)(86362001)(8936002)(11346002)(2616005)(446003)(426003)(76176011)(54906003)(476003)(51416003)(126002)(356004)(6666004)(105596002)(2906002)(2351001)(336012)(486006)(478600001)(36756003)(186003)(5660300002)(26826003)(26005)(87636003)(106466001); 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charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-i3c" Errors-To: linux-i3c-bounces+linux-i3c=archiver.kernel.org@lists.infradead.org This patch dropps support for I2C devices with 10 bit addressing. 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]; -- 2.8.3 _______________________________________________ linux-i3c mailing list linux-i3c@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-i3c