Commit 8c9312a9 authored Nov 06, 2019 by Wolfram Sang Committed by Wolfram Sang Dec 11, 2019

i2c: add helper to check if a client has a driver attached



As a preparation for an API conversion, factor out something frequently
used in the media subsystem. As an improvement, it bails out on both,
NULL and ERRPTR to handle the old and new API.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>

parent 3ac61258

include/linux/i2c.h

+5 −0

Original line number	Diff line number	Diff line
		@@ -851,6 +851,11 @@ extern void i2c_del_driver(struct i2c_driver *driver);
		#define i2c_add_driver(driver) \
		i2c_register_driver(THIS_MODULE, driver)

		static inline bool i2c_client_has_driver(struct i2c_client *client)
		{
		return !IS_ERR_OR_NULL(client) && client->dev.driver;
		}

		/* call the i2c_client->command() of all attached clients with
		* the given arguments */
		extern void i2c_clients_command(struct i2c_adapter *adap,

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