Implement a generic function to get a FW loader dev from a node. There is currently only get_fs_loader() but that is limited to chosen node and is limited only to FS loader.
Introduce get_fw_loader_from_node() that will parse the "firmware-loader" from a specified node and will loop over all the available FW loader until one is found (as it will be probed by the dedicated compatible) Signed-off-by: Christian Marangi <[email protected]> --- drivers/misc/fw_loader/fw_loader.c | 40 ++++++++++++++++++++++++++++++ include/fw_loader.h | 13 ++++++++++ 2 files changed, 53 insertions(+) diff --git a/drivers/misc/fw_loader/fw_loader.c b/drivers/misc/fw_loader/fw_loader.c index 6459ba23a15b..e477a631fae3 100644 --- a/drivers/misc/fw_loader/fw_loader.c +++ b/drivers/misc/fw_loader/fw_loader.c @@ -8,6 +8,7 @@ #include <blk.h> #include <linux/types.h> #include <dm/device.h> +#include <dm/uclass.h> #include <fw_loader.h> #include "internal.h" @@ -67,6 +68,45 @@ int generic_fw_loader_probe(struct udevice *dev) return 0; } +static int fw_loaders[] = { +#if CONFIG_IS_ENABLED(FS_LOADER) + UCLASS_FS_FIRMWARE_LOADER, +#endif +}; + +/** + * get_fw_loader_from_node - Get FW loader dev from @node. + * + * @node: ofnode where "firmware-loader" phandle is stored. + * @dev: pointer where to store the FW loader dev. + * + * Loop over all the supported FW loader and find a matching + * one. + * + * Return: Negative value if fail, 0 for successful. + */ +int get_fw_loader_from_node(ofnode node, struct udevice **dev) +{ + int i, ret; + + node = ofnode_parse_phandle(node, "firmware-loader", 0); + if (!ofnode_valid(node)) + return -ENODEV; + + /* + * Loop over all the available FW loaders and stop when + * found one. + */ + for (i = 0; i < ARRAY_SIZE(fw_loaders); i++) { + ret = uclass_get_device_by_ofnode(fw_loaders[i], + node, dev); + if (!ret) + return 0; + } + + return -ENODEV; +} + /** * _request_firmware_prepare - Prepare firmware struct. * diff --git a/include/fw_loader.h b/include/fw_loader.h index 56f5e3be6195..d07306c0674f 100644 --- a/include/fw_loader.h +++ b/include/fw_loader.h @@ -8,6 +8,19 @@ struct udevice; +/** + * get_fw_loader_from_node - Get FW loader dev from @node. + * + * @node: ofnode where "firmware-loader" phandle is stored. + * @dev: pointer where to store the FW loader dev. + * + * Loop over all the supported FW loader and find a matching + * one. + * + * Return: Negative value if fail, 0 for successful. + */ +int get_fw_loader_from_node(ofnode node, struct udevice **dev); + /** * request_firmware_into_buf - Load firmware into a previously allocated buffer. * @dev: An instance of a driver. -- 2.51.0
