bcm53xx: add kernel support for TP-LINK Archer C9 V1

Signed-off-by: Rafał Miłecki <rafal@milecki.pl>

1 files changed, 48 insertions, 0 deletions

diff --git a/target/linux/bcm53xx/patches-4.4/901-mtd-bcm47xxpart-add-device-specific-workarounds.patch b/target/linux/bcm53xx/patches-4.4/901-mtd-bcm47xxpart-add-device-specific-workarounds.patch
new file mode 100644
index 0000000000..06cb5104d5
--- /dev/null
+++ b/target/linux/bcm53xx/patches-4.4/901-mtd-bcm47xxpart-add-device-specific-workarounds.patch
@@ -0,0 +1,48 @@
+From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= <rafal@milecki.pl>
+Subject: [PATCH] mtd: bcm47xxpart: add device specific workarounds
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
+---
+
+--- a/drivers/mtd/bcm47xxpart.c
++++ b/drivers/mtd/bcm47xxpart.c
+@@ -14,6 +14,7 @@
+ #include <linux/slab.h>
+ #include <linux/mtd/mtd.h>
+ #include <linux/mtd/partitions.h>
++#include <linux/of.h>
+ 
+ #include <uapi/linux/magic.h>
+ 
+@@ -159,6 +160,28 @@ static int bcm47xxpart_parse(struct mtd_info *master,
+ 			break;
+ 		}
+ 
++		/*
++		 * Device specific workarounds (hacks). We should use DT to
++		 * define partitions but we need a working TRX firmware splitter
++		 * first.
++		 */
++		if (of_machine_is_compatible("asus,rt-ac87u") && offset == 0x7ec0000) {
++			/*
++			 * "asus" partition uses JFFS2 which we don't detect and
++			 * we don't want to as this could affect other devices.
++			 */
++			bcm47xxpart_add_part(&parts[curr_part++], "asus", offset, MTD_WRITEABLE);
++			continue;
++		} else  if (of_machine_is_compatible("tplink,archer-c9-v1") && offset == 0xe40000) {
++			/*
++			 * There is a whole set of partitions (not even listed
++			 * by original firmware): "default-mac", "pin",
++			 * "partition-table", etc.
++			 */
++			bcm47xxpart_add_part(&parts[curr_part++], "tplink", offset, MTD_WRITEABLE);
++			continue;
++		}
++
+ 		/* Read beginning of the block */
+ 		err = mtd_read(master, offset, BCM47XXPART_BYTES_TO_READ,
+ 			       &bytes_read, (uint8_t *)buf);