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soundwire: remove bitfield for unique_id, use u8 

There is no good reason why the unique_id needs to be stored as 4
bits. The code will work without changes with a u8 since all values
are already filtered while parsing the ACPI tables and Slave devID
registers.

Use u8 representation. This will allow us to encode a
"IGNORE_UNIQUE_ID" value to account for firmware/BIOS creativity.

Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20191022234808.17432-2-pierre-louis.bossart@linux.intel.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
alistair/sunxi64-5.5-dsi
Pierre-Louis Bossart 2019-10-22 18:48:06 -05:00 committed by Vinod Koul
parent c134f914e9
commit 5bd5453978
1 changed files with 3 additions and 1 deletions
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4
include/linux/soundwire/sdw.h
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@ -403,6 +403,8 @@ int sdw_slave_read_prop(struct sdw_slave *slave);
* SDW Slave Structures and APIs
*/
#define SDW_IGNORED_UNIQUE_ID 0xFF
/**
* struct sdw_slave_id - Slave ID
* @mfg_id: MIPI Manufacturer ID
@ -418,7 +420,7 @@ struct sdw_slave_id {
__u16 mfg_id;
__u16 part_id;
__u8 class_id;
__u8 unique_id:4;
__u8 unique_id;
__u8 sdw_version:4;
};