diff options
Diffstat (limited to 'nixos/modules/kernel-patches/0070-of_net-add-mac-address-increment-support.patch')
| -rw-r--r-- | nixos/modules/kernel-patches/0070-of_net-add-mac-address-increment-support.patch | 95 |
1 files changed, 0 insertions, 95 deletions
diff --git a/nixos/modules/kernel-patches/0070-of_net-add-mac-address-increment-support.patch b/nixos/modules/kernel-patches/0070-of_net-add-mac-address-increment-support.patch deleted file mode 100644 index d55e650..0000000 --- a/nixos/modules/kernel-patches/0070-of_net-add-mac-address-increment-support.patch +++ /dev/null @@ -1,95 +0,0 @@ -From 0cf7322f17785fc41d1e38a745a00ccd8fe7b8c0 Mon Sep 17 00:00:00 2001 -From: Ansuel Smith <ansuelsmth@gmail.com> -Date: Tue, 30 Mar 2021 18:21:14 +0200 -Subject: [PATCH 70/96] of_net: add mac-address-increment support - -Lots of embedded devices use the mac-address of other interface -extracted from nvmem cells and increments it by one or two. Add two -bindings to integrate this and directly use the right mac-address for -the interface. Some example are some routers that use the gmac -mac-address stored in the art partition and increments it by one for the -wifi. mac-address-increment-byte bindings is used to tell what byte of -the mac-address has to be increased (if not defined the last byte is -increased) and mac-address-increment tells how much the byte decided -early has to be increased. - -Signed-off-by: Ansuel Smith <ansuelsmth@gmail.com> ---- - net/core/of_net.c | 43 +++++++++++++++++++++++++++++++++++++++---- - 1 file changed, 39 insertions(+), 4 deletions(-) - -diff --git a/net/core/of_net.c b/net/core/of_net.c -index f1a9bf7578e7..44c7cb0dbbe7 100644 ---- a/net/core/of_net.c -+++ b/net/core/of_net.c -@@ -119,28 +119,63 @@ static int of_get_mac_addr_nvmem(struct device_node *np, u8 *addr) - * this case, the real MAC is in 'local-mac-address', and 'mac-address' exists - * but is all zeros. - * -+ * DT can tell the system to increment the mac-address after is extracted by -+ * using: -+ * - mac-address-increment-byte to decide what byte to increase -+ * (if not defined is increased the last byte) -+ * - mac-address-increment to decide how much to increase. The value WILL -+ * overflow to other bytes if the increment is over 255 or the total -+ * increment will exceed 255 of the current byte. -+ * (example 00:01:02:03:04:ff + 1 == 00:01:02:03:05:00) -+ * (example 00:01:02:03:04:fe + 5 == 00:01:02:03:05:03) -+ * - * Return: 0 on success and errno in case of error. - */ - int of_get_mac_address(struct device_node *np, u8 *addr) - { -+ u32 inc_idx, mac_inc, mac_val; - int ret; - -+ /* Check first if the increment byte is present and valid. -+ * If not set assume to increment the last byte if found. -+ */ -+ if (of_property_read_u32(np, "mac-address-increment-byte", &inc_idx)) -+ inc_idx = 5; -+ if (inc_idx < 3 || inc_idx > 5) -+ return -EINVAL; -+ - if (!np) - return -ENODEV; - - ret = of_get_mac_addr(np, "mac-address", addr); - if (!ret) -- return 0; -+ goto found; - - ret = of_get_mac_addr(np, "local-mac-address", addr); - if (!ret) -- return 0; -+ goto found; - - ret = of_get_mac_addr(np, "address", addr); - if (!ret) -- return 0; -+ goto found; - -- return of_get_mac_addr_nvmem(np, addr); -+ ret = of_get_mac_addr_nvmem(np, addr); -+ if (ret) -+ return ret; -+ -+found: -+ if (!of_property_read_u32(np, "mac-address-increment", &mac_inc)) { -+ /* Convert to a contiguous value */ -+ mac_val = (addr[3] << 16) + (addr[4] << 8) + addr[5]; -+ mac_val += mac_inc << 8 * (5-inc_idx); -+ -+ /* Apply the incremented value handling overflow case */ -+ addr[3] = (mac_val >> 16) & 0xff; -+ addr[4] = (mac_val >> 8) & 0xff; -+ addr[5] = (mac_val >> 0) & 0xff; -+ } -+ -+ return ret; - } - EXPORT_SYMBOL(of_get_mac_address); - --- -2.37.2 - |