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 search and probe a matching FW loader device, if found. Signed-off-by: Christian Marangi <[email protected]> --- drivers/misc/fw_loader/fw_loader-uclass.c | 23 +++++++++++++++++++++++ include/fw_loader.h | 14 ++++++++++++++ 2 files changed, 37 insertions(+) diff --git a/drivers/misc/fw_loader/fw_loader-uclass.c b/drivers/misc/fw_loader/fw_loader-uclass.c index 25bad7f7d701..d77d877a9eaa 100644 --- a/drivers/misc/fw_loader/fw_loader-uclass.c +++ b/drivers/misc/fw_loader/fw_loader-uclass.c @@ -9,6 +9,8 @@ #include <linux/types.h> #include <dm.h> #include <dm/device.h> +#include <dm/device-internal.h> +#include <dm/uclass.h> #include <fw_loader.h> #if CONFIG_IS_ENABLED(CMD_UBIFS) @@ -108,6 +110,27 @@ UCLASS_DRIVER(fw_loader) = { .per_device_auto = sizeof(struct firmware), }; +int get_fw_loader_from_node(ofnode node, struct udevice **dev) +{ + struct udevice *fw_dev; + int ret; + + node = ofnode_parse_phandle(node, "firmware-loader", 0); + if (!ofnode_valid(node)) + return -ENODEV; + + ret = device_find_global_by_ofnode(node, &fw_dev); + if (ret) + return ret; + + ret = device_probe(fw_dev); + if (ret) + return ret; + + *dev = fw_dev; + return 0; +} + /** * _request_firmware_prepare - Prepare firmware struct. * diff --git a/include/fw_loader.h b/include/fw_loader.h index 56f5e3be6195..99c47380a172 100644 --- a/include/fw_loader.h +++ b/include/fw_loader.h @@ -6,8 +6,22 @@ #ifndef _FW_LOADER_H_ #define _FW_LOADER_H_ +#include <dm/ofnode_decl.h> + 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. + * + * Search and probe a matching FW loader device, if found. + * + * 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. -- 2.53.0
