From 3d2262c9aa7ad413c97ab3713657401b7bfadcc6 Mon Sep 17 00:00:00 2001 From: Wolfram Sang Date: Fri, 4 Jul 2025 22:44:32 +0200 Subject: [PATCH] i3c: don't fail if GETHDRCAP is unsupported [ Upstream commit 447270cdb41b1c8c3621bb14b93a6749f942556e ] '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 Reviewed-by: Frank Li Link: https://lore.kernel.org/r/20250704204524.6124-1-wsa+renesas@sang-engineering.com Signed-off-by: Alexandre Belloni Signed-off-by: Sasha Levin --- drivers/i3c/master.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/i3c/master.c b/drivers/i3c/master.c index 7c1dc42b809bf..9b7a34f9eca29 100644 --- a/drivers/i3c/master.c +++ b/drivers/i3c/master.c @@ -1439,7 +1439,7 @@ static int i3c_master_retrieve_dev_info(struct i3c_dev_desc *dev) if (dev->info.bcr & I3C_BCR_HDR_CAP) { ret = i3c_master_gethdrcap_locked(master, &dev->info); - if (ret) + if (ret && ret != -ENOTSUPP) return ret; } -- 2.47.3