From f6abd5389ceab5fce185126c2364a324465fafbe Mon Sep 17 00:00:00 2001 From: Patrice Chotard Date: Wed, 24 Oct 2018 14:10:15 +0200 Subject: [PATCH] dm: uclass: Add uclass_next_device_err() to return a valid device Similarly to uclass_first_device_err(), add uclass_next_device_err() which returns an error if there are no next devices in that uclass. Signed-off-by: Patrice Chotard Reviewed-by: Simon Glass --- drivers/core/uclass.c | 13 +++++++++++++ include/dm/uclass.h | 12 ++++++++++++ 2 files changed, 25 insertions(+) diff --git a/drivers/core/uclass.c b/drivers/core/uclass.c index 6cfcde8918..d9c5719a87 100644 --- a/drivers/core/uclass.c +++ b/drivers/core/uclass.c @@ -562,6 +562,19 @@ int uclass_next_device(struct udevice **devp) return uclass_get_device_tail(dev, ret, devp); } +int uclass_next_device_err(struct udevice **devp) +{ + int ret; + + ret = uclass_next_device(devp); + if (ret) + return ret; + else if (!*devp) + return -ENODEV; + + return 0; +} + int uclass_first_device_check(enum uclass_id id, struct udevice **devp) { int ret; diff --git a/include/dm/uclass.h b/include/dm/uclass.h index 4ef0d0f0c0..93f761c96e 100644 --- a/include/dm/uclass.h +++ b/include/dm/uclass.h @@ -307,6 +307,18 @@ int uclass_first_device_err(enum uclass_id id, struct udevice **devp); */ int uclass_next_device(struct udevice **devp); +/** + * uclass_next_device_err() - Get the next device in a uclass + * + * The device returned is probed if necessary, and ready for use + * + * @devp: On entry, pointer to device to lookup. On exit, returns pointer + * to the next device in the uclass if no error occurred, or -ENODEV if + * there is no next device. + * @return 0 if found, -ENODEV if not found, other -ve on error + */ +int uclass_next_device_err(struct udevice **devp); + /** * uclass_first_device_check() - Get the first device in a uclass * -- 2.39.5