i3c: don't fail if GETHDRCAP is unsupported
authorWolfram Sang <wsa+renesas@sang-engineering.com>
Fri, 4 Jul 2025 20:44:32 +0000 (22:44 +0200)
committerAlexandre Belloni <alexandre.belloni@bootlin.com>
Mon, 7 Jul 2025 21:14:26 +0000 (23:14 +0200)
commit447270cdb41b1c8c3621bb14b93a6749f942556e
tree72a1d6afed97016e062897126d97b12e8f08741e
parent4f5ee6405f8bde3d8c037531e0c57be5cd32de3d
i3c: don't fail if GETHDRCAP is unsupported

'I3C_BCR_HDR_CAP' is still spec v1.0 and has been renamed to 'advanced
capabilities' in v1.1 onwards. The ST pressure sensor LPS22DF does not
have HDR, but has the 'advanced cap' bit set. The core still wants to
get additional information using the CCC 'GETHDRCAP' (or GETCAPS in v1.1
onwards). Not all controllers support this CCC and will notify the upper
layers about it. For instantiating the device, we can ignore this
unsupported CCC as standard communication will work. Without this patch,
the device will not be instantiated at all.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Reviewed-by: Frank Li <Frank.Li@nxp.com>
Link: https://lore.kernel.org/r/20250704204524.6124-1-wsa+renesas@sang-engineering.com
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
drivers/i3c/master.c