openwrt/target/linux/ath79/patches-5.4/0040-ath79-sgmii-config.patch
David Bauer fbbad9a9a6 ath79: force SGMII SerDes mode to MAC operation
The mode on the SGMII SerDes on the QCA9563 is 1000 Base-X by default.
This only allows for 1000 Mbit/s links, however when used with an SGMII
PHY in 100 Mbit/s link mode, the link remains dead.

This strictly has nothing to do with the SerDes calibration, however it
is done at the same point in the QCA reference U-Boot which is the
blueprint for everything happening here. As the current state is more or
less a hack, this should be fine.

This fixes the issues outlined above on a TP-Link EAP-225 Outdoor.

Reported-by: Tom Herbers <freifunk@tomherbers.de>
Tested-by: Tom Herbers <freifunk@tomherbers.de>
Signed-off-by: David Bauer <mail@david-bauer.net>
2021-04-13 00:32:56 +02:00

10 lines
322 B
Diff

--- a/arch/mips/include/asm/mach-ath79/ar71xx_regs.h
+++ b/arch/mips/include/asm/mach-ath79/ar71xx_regs.h
@@ -1376,5 +1376,6 @@
#define QCA956X_SGMII_CONFIG_MODE_CTRL_SHIFT 0
#define QCA956X_SGMII_CONFIG_MODE_CTRL_MASK 0x7
+#define QCA956X_SGMII_CONFIG_MODE_CTRL_SGMII_MAC 0x2
#endif /* __ASM_MACH_AR71XX_REGS_H */