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i2c: Make I2C ID tables non-mandatory for DT'ed devices 

Currently the I2C framework insists on devices supplying an I2C ID
table.  Many of the devices which do so unnecessarily adding quite a
few wasted lines to kernel code.  This patch allows drivers a means
to 'not' supply the aforementioned table and match on DT match tables
instead.

Acked-by: Grant Likely <grant.likely@linaro.org>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Tested-by: Kieran Bingham <kieran@bingham.xyz>
Reviewed-by: Javier Martinez Canillas <javier@osg.samsung.com>
Tested-by: Javier Martinez Canillas <javier@osg.samsung.com>
Signed-off-by: Kieran Bingham <kieran@bingham.xyz>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
This commit is contained in:
Lee Jones 2016-11-07 12:47:39 +00:00 committed by Wolfram Sang
parent 298d4de1ed
commit da10c06a04
1 changed files with 10 additions and 2 deletions
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12
drivers/i2c/i2c-core.c
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@ -697,7 +697,7 @@ static int i2c_device_match(struct device *dev, struct device_driver *drv)
/* Attempt an OF style match */
if (of_driver_match_device(dev, drv))
if (i2c_of_match_device(drv->of_match_table, client))
return 1;
/* Then ACPI style match */
@ -923,7 +923,15 @@ static int i2c_device_probe(struct device *dev)
}
driver = to_i2c_driver(dev->driver);
if (!driver->probe || !driver->id_table)
if (!driver->probe)
return -EINVAL;
/*
* An I2C ID table is not mandatory, if and only if, a suitable Device
* Tree match table entry is supplied for the probing device.
*/
if (!driver->id_table &&
!i2c_of_match_device(dev->driver->of_match_table, client))
return -ENODEV;
if (client->flags & I2C_CLIENT_WAKE) {