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| author | Romain Gantois <romain.gantois@bootlin.com> | 2025-03-06 19:23:25 +0300 |
|---|---|---|
| committer | Wolfram Sang <wsa+renesas@sang-engineering.com> | 2025-04-19 00:33:46 +0300 |
| commit | 818bd489f137e9257d701c0d4bf11efdfd02ca5f (patch) | |
| tree | 7732249c0b8287d537964e43135f1915778d74ae /include/linux | |
| parent | 3ec29d51b546f69de0b0d10642c9aaaf5e3704eb (diff) | |
| download | linux-818bd489f137e9257d701c0d4bf11efdfd02ca5f.tar.xz | |
i2c: use client addresses directly in ATR interface
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>
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/i2c-atr.h | 20 |
1 files changed, 10 insertions, 10 deletions
diff --git a/include/linux/i2c-atr.h b/include/linux/i2c-atr.h index 4d5da161c225..14c1f9175c0d 100644 --- a/include/linux/i2c-atr.h +++ b/include/linux/i2c-atr.h @@ -20,20 +20,20 @@ struct i2c_atr; /** * struct i2c_atr_ops - Callbacks from ATR to the device driver. - * @attach_client: Notify the driver of a new device connected on a child - * bus, with the alias assigned to it. The driver must - * configure the hardware to use the alias. - * @detach_client: Notify the driver of a device getting disconnected. The - * driver must configure the hardware to stop using the - * alias. + * @attach_addr: Notify the driver of a new device connected on a child + * bus, with the alias assigned to it. The driver must + * configure the hardware to use the alias. + * @detach_addr: Notify the driver of a device getting disconnected. The + * driver must configure the hardware to stop using the + * alias. * * All these functions return 0 on success, a negative error code otherwise. */ struct i2c_atr_ops { - int (*attach_client)(struct i2c_atr *atr, u32 chan_id, - const struct i2c_client *client, u16 alias); - void (*detach_client)(struct i2c_atr *atr, u32 chan_id, - const struct i2c_client *client); + int (*attach_addr)(struct i2c_atr *atr, u32 chan_id, + u16 addr, u16 alias); + void (*detach_addr)(struct i2c_atr *atr, u32 chan_id, + u16 addr); }; /** |