diff mbox series

[2/2] net: of: Support adding offset to nvmem MAC addresses

Message ID 20241220-net-mac-nvmem-offset-v1-2-e9d1da2c1681@linaro.org (mailing list archive)
State New
Delegated to: Netdev Maintainers
Headers show
Series net: of: Support minor nvmem MAC offset | expand

Checks

Context Check Description
netdev/series_format success Posting correctly formatted
netdev/tree_selection success Guessed tree name to be net-next
netdev/ynl success Generated files up to date; no warnings/errors; no diff in generated;
netdev/fixes_present success Fixes tag not required for -next series
netdev/header_inline success No static functions without inline keyword in header files
netdev/build_32bit success Errors and warnings before: 1 this patch: 1
netdev/build_tools success No tools touched, skip
netdev/cc_maintainers success CCed 8 of 8 maintainers
netdev/build_clang success Errors and warnings before: 3 this patch: 3
netdev/verify_signedoff success Signed-off-by tag matches author and committer
netdev/deprecated_api success None detected
netdev/check_selftest success No net selftest shell script
netdev/verify_fixes success No Fixes tag
netdev/build_allmodconfig_warn success Errors and warnings before: 1 this patch: 1
netdev/checkpatch warning WARNING: line length of 81 exceeds 80 columns
netdev/build_clang_rust success No Rust files in patch. Skipping build
netdev/kdoc success Errors and warnings before: 5 this patch: 5
netdev/source_inline success Was 0 now: 0
netdev/contest success net-next-2024-12-21--00-00 (tests: 879)

Commit Message

Linus Walleij Dec. 20, 2024, 7:17 p.m. UTC 
If a lower-byte MAC address offset is encoded into the device
tree, make sure to add this to the returned address when
looking up a MAC address from NVMEM.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
---
 net/core/of_net.c | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)
diff mbox series

Patch

diff --git a/net/core/of_net.c b/net/core/of_net.c
index 93ea425b9248a23f4f95a336e9cdbf0053248e32..c98000ec13377ea4b541e182a66be8b1010edc40 100644
--- a/net/core/of_net.c
+++ b/net/core/of_net.c
@@ -64,6 +64,7 @@  int of_get_mac_address_nvmem(struct device_node *np, u8 *addr)
 	struct nvmem_cell *cell;
 	const void *mac;
 	size_t len;
+	u32 offset;
 	int ret;
 
 	/* Try lookup by device first, there might be a nvmem_cell_lookup
@@ -72,7 +73,7 @@  int of_get_mac_address_nvmem(struct device_node *np, u8 *addr)
 	if (pdev) {
 		ret = nvmem_get_mac_address(&pdev->dev, addr);
 		put_device(&pdev->dev);
-		return ret;
+		goto add_offset_exit;
 	}
 
 	cell = of_nvmem_cell_get(np, "mac-address");
@@ -92,8 +93,13 @@  int of_get_mac_address_nvmem(struct device_node *np, u8 *addr)
 
 	memcpy(addr, mac, ETH_ALEN);
 	kfree(mac);
+	ret = 0;
 
-	return 0;
+add_offset_exit:
+	if (!ret && !of_property_read_u32(np, "nvmem-mac-minor-offset", &offset))
+		addr[ETH_ALEN - 1] += offset;
+
+	return ret;
 }
 EXPORT_SYMBOL(of_get_mac_address_nvmem);