i2c: Add i2c_get_match_data()
[ Upstream commit 564d73c4d9201526bd976b9379d2aaf1a7133e84 ] Add i2c_get_match_data() to get match data for I2C, ACPI and DT-based matching, so that we can optimize the driver code. Suggested-by: Geert Uytterhoeven <geert+renesas@glider.be> Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com> [wsa: simplified var initialization] Signed-off-by: Wolfram Sang <wsa@kernel.org> Stable-dep-of: 119abf7d1815 ("hwmon: (max16065) Fix alarm attributes") Signed-off-by: Sasha Levin <sashal@kernel.org>
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2 changed files with 21 additions and 0 deletions
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@ -92,6 +92,25 @@ const struct i2c_device_id *i2c_match_id(const struct i2c_device_id *id,
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}
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}
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EXPORT_SYMBOL_GPL(i2c_match_id);
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EXPORT_SYMBOL_GPL(i2c_match_id);
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const void *i2c_get_match_data(const struct i2c_client *client)
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{
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struct i2c_driver *driver = to_i2c_driver(client->dev.driver);
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const struct i2c_device_id *match;
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const void *data;
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data = device_get_match_data(&client->dev);
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if (!data) {
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match = i2c_match_id(driver->id_table, client);
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if (!match)
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return NULL;
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data = (const void *)match->driver_data;
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}
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return data;
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}
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EXPORT_SYMBOL(i2c_get_match_data);
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static int i2c_device_match(struct device *dev, struct device_driver *drv)
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static int i2c_device_match(struct device *dev, struct device_driver *drv)
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{
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{
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struct i2c_client *client = i2c_verify_client(dev);
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struct i2c_client *client = i2c_verify_client(dev);
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@ -342,6 +342,8 @@ struct i2c_adapter *i2c_verify_adapter(struct device *dev);
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const struct i2c_device_id *i2c_match_id(const struct i2c_device_id *id,
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const struct i2c_device_id *i2c_match_id(const struct i2c_device_id *id,
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const struct i2c_client *client);
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const struct i2c_client *client);
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const void *i2c_get_match_data(const struct i2c_client *client);
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static inline struct i2c_client *kobj_to_i2c_client(struct kobject *kobj)
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static inline struct i2c_client *kobj_to_i2c_client(struct kobject *kobj)
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{
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{
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struct device * const dev = kobj_to_dev(kobj);
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struct device * const dev = kobj_to_dev(kobj);
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