On 1/19/22 02:42, Simon Glass wrote:
In some cases two devices are related and the only way to tell is to check that the names partially patch. Add a way to check this without needing to create a new string for the comparison.Fix the comment for device_find_child_by_namelen() while we are here. Signed-off-by: Simon Glass <s...@chromium.org> --- Changes in v3: - Add new patch to support finding a uclass device by partial name drivers/core/uclass.c | 13 ++++++++++--- include/dm/device.h | 2 +- include/dm/uclass-internal.h | 16 ++++++++++++++++ 3 files changed, 27 insertions(+), 4 deletions(-) diff --git a/drivers/core/uclass.c b/drivers/core/uclass.c index 563ff9b2856..a0d3840802b 100644 --- a/drivers/core/uclass.c +++ b/drivers/core/uclass.c @@ -274,8 +274,8 @@ int uclass_find_next_device(struct udevice **devp) return 0; } -int uclass_find_device_by_name(enum uclass_id id, const char *name, - struct udevice **devp) +int uclass_find_device_by_namelen(enum uclass_id id, const char *name, int len, + struct udevice **devp) { struct uclass *uc; struct udevice *dev; @@ -289,7 +289,8 @@ int uclass_find_device_by_name(enum uclass_id id, const char *name, return ret; uclass_foreach_dev(dev, uc) { - if (!strcmp(dev->name, name)) { + if (!strncmp(dev->name, name, len) && + strlen(dev->name) == len) { *devp = dev; return 0; } @@ -298,6 +299,12 @@ int uclass_find_device_by_name(enum uclass_id id, const char *name, return -ENODEV; } +int uclass_find_device_by_name(enum uclass_id id, const char *name, + struct udevice **devp) +{ + return uclass_find_device_by_namelen(id, name, strlen(name), devp); +} + int uclass_find_next_free_seq(struct uclass *uc) { struct udevice *dev; diff --git a/include/dm/device.h b/include/dm/device.h index 435a1114f1c..30703af96e4 100644 --- a/include/dm/device.h +++ b/include/dm/device.h @@ -791,7 +791,7 @@ int device_find_first_child_by_uclass(const struct udevice *parent, struct udevice **devp); /** - * device_find_child_by_name() - Find a child by device name + * device_find_child_by_namelen() - Find a child by device name * * @parent: Parent device to search * @name: Name to look for diff --git a/include/dm/uclass-internal.h b/include/dm/uclass-internal.h index fb0edcc2969..1118f64bdfd 100644 --- a/include/dm/uclass-internal.h +++ b/include/dm/uclass-internal.h @@ -154,6 +154,22 @@ int uclass_find_first_device(enum uclass_id id, struct udevice **devp); */ int uclass_find_next_device(struct udevice **devp); +/** + * uclass_find_device_by_namelen() - Find uclass device based on ID and name + * + * This searches for a device with the exactly given name. + * + * The device is NOT probed, it is merely returned. + * + * @id: ID to look up + * @name: name of a device to find + * @len: Length of @name (the uclass driver name must have the same length) + * @devp: Returns pointer to device (the first one with the name) + * @return 0 if OK, -ve on error
Return: https://www.kernel.org/doc/html/latest/doc-guide/kernel-doc.html#function-documentation Best regards Heinrich
+ */ +int uclass_find_device_by_namelen(enum uclass_id id, const char *name, int len, + struct udevice **devp); + /** * uclass_find_device_by_name() - Find uclass device based on ID and name *
