From: Michael Walle <michael@walle.cc>
To: linux-mtd@lists.infradead.org, devicetree@vger.kernel.org,
linux-kernel@vger.kernel.org,
linux-arm-kernel@lists.infradead.org, netdev@vger.kernel.org
Cc: Miquel Raynal <miquel.raynal@bootlin.com>,
Richard Weinberger <richard@nod.at>,
Vignesh Raghavendra <vigneshr@ti.com>,
Rob Herring <robh+dt@kernel.org>,
Srinivas Kandagatla <srinivas.kandagatla@linaro.org>,
Shawn Guo <shawnguo@kernel.org>, Li Yang <leoyang.li@nxp.com>,
Frank Rowand <frowand.list@gmail.com>,
"David S . Miller" <davem@davemloft.net>,
Jakub Kicinski <kuba@kernel.org>,
Ansuel Smith <ansuelsmth@gmail.com>, Andrew Lunn <andrew@lunn.ch>,
Michael Walle <michael@walle.cc>
Subject: [PATCH 5/8] net: add helper eth_addr_add()
Date: Tue, 28 Dec 2021 15:25:46 +0100 [thread overview]
Message-ID: <20211228142549.1275412-6-michael@walle.cc> (raw)
In-Reply-To: <20211228142549.1275412-1-michael@walle.cc>
Add a helper to add an offset to a ethernet address. This comes in handy
if you have a base ethernet address for multiple interfaces.
Signed-off-by: Michael Walle <michael@walle.cc>
---
include/linux/etherdevice.h | 14 ++++++++++++++
1 file changed, 14 insertions(+)
diff --git a/include/linux/etherdevice.h b/include/linux/etherdevice.h
index 2ad71cc90b37..9d621dc85290 100644
--- a/include/linux/etherdevice.h
+++ b/include/linux/etherdevice.h
@@ -486,6 +486,20 @@ static inline void eth_addr_inc(u8 *addr)
u64_to_ether_addr(u, addr);
}
+/**
+ * eth_addr_add() - Add (or subtract) and offset to/from the given MAC address.
+ *
+ * @offset: Offset to add.
+ * @addr: Pointer to a six-byte array containing Ethernet address to increment.
+ */
+static inline void eth_addr_add(u8 *addr, long offset)
+{
+ u64 u = ether_addr_to_u64(addr);
+
+ u += offset;
+ u64_to_ether_addr(u, addr);
+}
+
/**
* is_etherdev_addr - Tell if given Ethernet address belongs to the device.
* @dev: Pointer to a device structure
--
2.30.2
next prev parent reply other threads:[~2021-12-28 14:26 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-12-28 14:25 [PATCH 0/8] nvmem: add ethernet address offset support Michael Walle
2021-12-28 14:25 ` [PATCH 1/8] of: base: add of_parse_phandle_with_optional_args() Michael Walle
2022-01-10 19:06 ` Rob Herring
2021-12-28 14:25 ` [PATCH 2/8] dt-bindings: nvmem: add transformation bindings Michael Walle
2021-12-29 17:34 ` Rob Herring
2022-01-04 15:03 ` Rob Herring
2022-01-05 8:25 ` Michael Walle
2022-01-05 14:20 ` Rob Herring
2021-12-28 14:25 ` [PATCH 3/8] nvmem: core: add an index parameter to the cell Michael Walle
2021-12-28 14:25 ` [PATCH 4/8] nvmem: core: add transformations support Michael Walle
2021-12-28 14:25 ` Michael Walle [this message]
2022-01-25 10:24 ` [PATCH 5/8] net: add helper eth_addr_add() Rafał Miłecki
2022-08-25 9:46 ` Michael Walle
2021-12-28 14:25 ` [PATCH 6/8] nvmem: transformations: ethernet address offset support Michael Walle
2022-01-25 12:08 ` Rafał Miłecki
2022-01-25 14:59 ` Michael Walle
2021-12-28 14:25 ` [PATCH 7/8] arm64: dts: ls1028a: sl28: get MAC addresses from VPD Michael Walle
2021-12-28 14:25 ` [PATCH 8/8] arm64: defconfig: enable NVMEM transformations Michael Walle
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