diff options
author | Hauke Mehrtens <hauke@hauke-m.de> | 2020-02-23 13:20:11 +0100 |
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committer | Koen Vandeputte <koen.vandeputte@ncentric.com> | 2020-02-28 17:50:45 +0100 |
commit | c16517d26de30c90dabce1e456615fd7fbdce07c (patch) | |
tree | e7371ee12a3c413a064885b634ee4c975ad7f96a /target/linux/generic/pending-5.4/681-NET-add-of_get_mac_address_mtd.patch | |
parent | 955634b473284847e3c8281a6ac85655329d8b06 (diff) | |
download | upstream-c16517d26de30c90dabce1e456615fd7fbdce07c.tar.gz upstream-c16517d26de30c90dabce1e456615fd7fbdce07c.tar.bz2 upstream-c16517d26de30c90dabce1e456615fd7fbdce07c.zip |
kernel: copy kernel 4.19 code to 5.4
No changes were done to the patches while coping them. Currently they do
not apply on top of kernel 5.4.
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
Diffstat (limited to 'target/linux/generic/pending-5.4/681-NET-add-of_get_mac_address_mtd.patch')
-rw-r--r-- | target/linux/generic/pending-5.4/681-NET-add-of_get_mac_address_mtd.patch | 133 |
1 files changed, 133 insertions, 0 deletions
diff --git a/target/linux/generic/pending-5.4/681-NET-add-of_get_mac_address_mtd.patch b/target/linux/generic/pending-5.4/681-NET-add-of_get_mac_address_mtd.patch new file mode 100644 index 0000000000..13f5640590 --- /dev/null +++ b/target/linux/generic/pending-5.4/681-NET-add-of_get_mac_address_mtd.patch @@ -0,0 +1,133 @@ +From: John Crispin <blogic@openwrt.org> +Subject: NET: add mtd-mac-address support to of_get_mac_address() + +Many embedded devices have information such as mac addresses stored inside mtd +devices. This patch allows us to add a property inside a node describing a +network interface. The new property points at a mtd partition with an offset +where the mac address can be found. + +Signed-off-by: John Crispin <blogic@openwrt.org> +Signed-off-by: Felix Fietkau <nbd@nbd.name> +--- + drivers/of/of_net.c | 37 +++++++++++++++++++++++++++++++++++++ + include/linux/of_net.h | 1 + + 2 files changed, 38 insertions(+) + +--- a/drivers/of/of_net.c ++++ b/drivers/of/of_net.c +@@ -11,6 +11,7 @@ + #include <linux/of_net.h> + #include <linux/phy.h> + #include <linux/export.h> ++#include <linux/mtd/mtd.h> + + /** + * of_get_phy_mode - Get phy mode for given device_node +@@ -39,7 +40,7 @@ int of_get_phy_mode(struct device_node * + } + EXPORT_SYMBOL_GPL(of_get_phy_mode); + +-static const void *of_get_mac_addr(struct device_node *np, const char *name) ++static void *of_get_mac_addr(struct device_node *np, const char *name) + { + struct property *pp = of_find_property(np, name, NULL); + +@@ -48,6 +49,79 @@ static const void *of_get_mac_addr(struc + return NULL; + } + ++static const void *of_get_mac_address_mtd(struct device_node *np) ++{ ++#ifdef CONFIG_MTD ++ struct device_node *mtd_np = NULL; ++ struct property *prop; ++ size_t retlen; ++ int size, ret; ++ struct mtd_info *mtd; ++ const char *part; ++ const __be32 *list; ++ phandle phandle; ++ u32 mac_inc = 0; ++ u8 mac[ETH_ALEN]; ++ void *addr; ++ u32 inc_idx; ++ ++ list = of_get_property(np, "mtd-mac-address", &size); ++ if (!list || (size != (2 * sizeof(*list)))) ++ return NULL; ++ ++ phandle = be32_to_cpup(list++); ++ if (phandle) ++ mtd_np = of_find_node_by_phandle(phandle); ++ ++ if (!mtd_np) ++ return NULL; ++ ++ part = of_get_property(mtd_np, "label", NULL); ++ if (!part) ++ part = mtd_np->name; ++ ++ mtd = get_mtd_device_nm(part); ++ if (IS_ERR(mtd)) ++ return NULL; ++ ++ ret = mtd_read(mtd, be32_to_cpup(list), 6, &retlen, mac); ++ put_mtd_device(mtd); ++ ++ if (of_property_read_u32(np, "mtd-mac-address-increment-byte", &inc_idx)) ++ inc_idx = 5; ++ if (inc_idx > 5) ++ return NULL; ++ ++ if (!of_property_read_u32(np, "mtd-mac-address-increment", &mac_inc)) ++ mac[inc_idx] += mac_inc; ++ ++ if (!is_valid_ether_addr(mac)) ++ return NULL; ++ ++ addr = of_get_mac_addr(np, "mac-address"); ++ if (addr) { ++ memcpy(addr, mac, ETH_ALEN); ++ return addr; ++ } ++ ++ prop = kzalloc(sizeof(*prop), GFP_KERNEL); ++ if (!prop) ++ return NULL; ++ ++ prop->name = "mac-address"; ++ prop->length = ETH_ALEN; ++ prop->value = kmemdup(mac, ETH_ALEN, GFP_KERNEL); ++ if (!prop->value || of_add_property(np, prop)) ++ goto free; ++ ++ return prop->value; ++free: ++ kfree(prop->value); ++ kfree(prop); ++#endif ++ return NULL; ++} ++ + /** + * Search the device tree for the best MAC address to use. 'mac-address' is + * checked first, because that is supposed to contain to "most recent" MAC +@@ -65,11 +139,18 @@ static const void *of_get_mac_addr(struc + * addresses. Some older U-Boots only initialized 'local-mac-address'. In + * this case, the real MAC is in 'local-mac-address', and 'mac-address' exists + * but is all zeros. ++ * ++ * If a mtd-mac-address property exists, try to fetch the MAC address from the ++ * specified mtd device, and store it as a 'mac-address' property + */ + const void *of_get_mac_address(struct device_node *np) + { + const void *addr; + ++ addr = of_get_mac_address_mtd(np); ++ if (addr) ++ return addr; ++ + addr = of_get_mac_addr(np, "mac-address"); + if (addr) + return addr; |