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[83.35.57.188]) by smtp.gmail.com with ESMTPSA id fc15-20020a05600c524f00b003cf57329221sm9930077wmb.14.2022.11.06.08.42.49 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 06 Nov 2022 08:42:50 -0800 (PST) From: Angel Iglesias To: linux-iio@vger.kernel.org Cc: linux-kernel@vger.kernel.org, Angel Iglesias , =?utf-8?q?Nuno_S=C3=A1?= , Andy Shevchenko , Jonathan Cameron , Wolfram Sang , linux-i2c@vger.kernel.org Subject: [PATCH v2 1/2] i2c: core: Introduce i2c_client_get_device_id helper function Date: Sun, 6 Nov 2022 17:42:24 +0100 Message-Id: X-Mailer: git-send-email 2.38.1 In-Reply-To: References: MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-i2c@vger.kernel.org Introduces new helper function to aid in .probe_new() refactors. In order to use existing i2c_get_device_id() on the probe callback, the device match table needs to be accessible in that function, which would require bigger refactors in some drivers using the deprecated .probe callback. This issue was discussed in more detail in the IIO mailing list. Link: https://lore.kernel.org/all/20221023132302.911644-11-u.kleine-koenig@pengutronix.de/ Suggested-by: Nuno Sá Suggested-by: Andy Shevchenko Suggested-by: Jonathan Cameron Signed-off-by: Angel Iglesias Reviewed-by: Andy Shevchenko diff --git a/drivers/i2c/i2c-core-base.c b/drivers/i2c/i2c-core-base.c index b4edf10e8fd0..920676e62c22 100644 --- a/drivers/i2c/i2c-core-base.c +++ b/drivers/i2c/i2c-core-base.c @@ -2236,6 +2236,21 @@ int i2c_get_device_id(const struct i2c_client *client, } EXPORT_SYMBOL_GPL(i2c_get_device_id); +/** + * i2c_client_get_device_id - get the driver match table entry of a device + * @client: the device to query. The device must be bound to a driver or + * the function oopses. + * + * Returns a pointer to the matching entry if found, NULL otherwise. + */ +const struct i2c_device_id *i2c_client_get_device_id(const struct i2c_client *client) +{ + const struct i2c_driver *drv = to_i2c_driver(client->dev.driver); + + return i2c_match_id(drv->id_table, client); +} +EXPORT_SYMBOL_GPL(i2c_client_get_device_id); + /* ---------------------------------------------------- * the i2c address scanning function * Will not work for 10-bit addresses! diff --git a/include/linux/i2c.h b/include/linux/i2c.h index f7c49bbdb8a1..d84e0e99f084 100644 --- a/include/linux/i2c.h +++ b/include/linux/i2c.h @@ -189,6 +189,7 @@ s32 i2c_smbus_read_i2c_block_data_or_emulated(const struct i2c_client *client, u8 *values); int i2c_get_device_id(const struct i2c_client *client, struct i2c_device_identity *id); +const struct i2c_device_id *i2c_client_get_device_id(const struct i2c_client *client); #endif /* I2C */ /**