i2c: use client addresses directly in ATR interface

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The I2C Address Translator (ATR) module defines mappings from i2c_client
structs to aliases. However, only the physical address of each i2c_client
struct is actually relevant to the workings of the ATR module. Moreover,
some drivers require address translation functionality but do not allocate
i2c_client structs, accessing the adapter directly instead. The SFP
subsystem is an example of this.

Replace the "i2c_client" field of the i2c_atr_alias_pair struct with a u16
"addr" field. Rewrite helper functions and callbacks as needed.

Reviewed-by: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>
Tested-by: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>
Signed-off-by: Romain Gantois <romain.gantois@bootlin.com>
Acked-by: Andi Shyti <andi.shyti@kernel.org>
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>

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Romain Gantois 2025-03-06 17:23:25 +01:00 • committed by Wolfram Sang

parent 3ec29d51b5

commit 818bd489f1

3 changed files with 41 additions and 55 deletions

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52

drivers/i2c/i2c-atr.c

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24

drivers/media/i2c/ds90ub960.c

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20

include/linux/i2c-atr.h

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