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Wed, 27 Feb 2019 18:37:57 GMT From: Przemyslaw Gaj To: Subject: [PATCH v3 1/4] i3c: Drop support for I2C 10 bit addresing Date: Wed, 27 Feb 2019 18:37:47 +0000 Message-ID: <20190227183750.15367-2-pgaj@cadence.com> X-Mailer: git-send-email 2.8.3 In-Reply-To: <20190227183750.15367-1-pgaj@cadence.com> References: <20190227183750.15367-1-pgaj@cadence.com> MIME-Version: 1.0 X-OrganizationHeadersPreserved: maileu3.global.cadence.com X-EOPAttributedMessage: 0 X-Forefront-Antispam-Report: CIP:199.43.4.28; IPV:CAL; SCL:-1; CTRY:US; EFV:NLI; SFV:NSPM; SFS:(10009020)(136003)(39860400002)(376002)(396003)(346002)(2980300002)(36092001)(189003)(199004)(68736007)(26826003)(50226002)(8936002)(81166006)(81156014)(87636003)(478600001)(6666004)(305945005)(2351001)(106466001)(316002)(1076003)(47776003)(97736004)(356004)(8676002)(16586007)(5660300002)(76176011)(42186006)(54906003)(51416003)(86362001)(446003)(50466002)(11346002)(476003)(2616005)(486006)(186003)(426003)(5024004)(14444005)(126002)(2906002)(69596002)(48376002)(6916009)(107886003)(105596002)(53936002)(4326008)(26005)(36756003)(336012); 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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 v2 and v3 are: - Remove i2c_funcs() hook. - Reduce address space for I2C devices. Main changes between v1 and v2 are: - Add error message when registering I2C device with 10 bit address. --- drivers/i3c/master.c | 19 +++++++++++-------- include/linux/i3c/master.h | 5 +---- 2 files changed, 12 insertions(+), 12 deletions(-) diff --git a/drivers/i3c/master.c b/drivers/i3c/master.c index 2dc628d..5b3adb3 100644 --- a/drivers/i3c/master.c +++ b/drivers/i3c/master.c @@ -1962,6 +1962,16 @@ 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]; @@ -2111,16 +2121,9 @@ static int i3c_master_i2c_adapter_xfer(struct i2c_adapter *adap, return ret ? ret : nxfers; } -static u32 i3c_master_i2c_functionalities(struct i2c_adapter *adap) -{ - struct i3c_master_controller *master = i2c_adapter_to_i3c_master(adap); - - return master->ops->i2c_funcs(master); -} - static const struct i2c_algorithm i3c_master_i2c_algo = { .master_xfer = i3c_master_i2c_adapter_xfer, - .functionality = i3c_master_i2c_functionalities, + .functionality = I2C_FUNC_SMBUS_EMUL | I2C_FUNC_I2C, }; static int i3c_master_i2c_adapter_init(struct i3c_master_controller *master) diff --git a/include/linux/i3c/master.h b/include/linux/i3c/master.h index f13fd8b..eca8337 100644 --- a/include/linux/i3c/master.h +++ b/include/linux/i3c/master.h @@ -48,7 +48,7 @@ struct i3c_i2c_dev_desc { #define I3C_LVR_I2C_INDEX(x) ((x) << 5) #define I3C_LVR_I2C_FM_MODE BIT(4) -#define I2C_MAX_ADDR GENMASK(9, 0) +#define I2C_MAX_ADDR GENMASK(6, 0) /** * struct i2c_dev_boardinfo - I2C device board information @@ -390,8 +390,6 @@ struct i3c_bus { * and i2c_put_dma_safe_msg_buf() helpers provided by the I2C * framework. * This method is mandatory. - * @i2c_funcs: expose the supported I2C functionalities. - * This method is mandatory. * @request_ibi: attach an IBI handler to an I3C device. This implies defining * an IBI handler and the constraints of the IBI (maximum payload * length and number of pre-allocated slots). @@ -437,7 +435,6 @@ struct i3c_master_controller_ops { void (*detach_i2c_dev)(struct i2c_dev_desc *dev); int (*i2c_xfers)(struct i2c_dev_desc *dev, const struct i2c_msg *xfers, int nxfers); - u32 (*i2c_funcs)(struct i3c_master_controller *master); int (*request_ibi)(struct i3c_dev_desc *dev, const struct i3c_ibi_setup *req); void (*free_ibi)(struct i3c_dev_desc *dev); -- 2.8.3 _______________________________________________ linux-i3c mailing list linux-i3c@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-i3c