ar71xx: mikrotik: rb91x: fix 10M ethernet link speed

Extensive testing on the board showed that ethernet does
not work when forced to 10Mbps.

Trial-and-error revealed that the correct PLL value
should be altered to 0x00001313 (iso 0x00001616)

The change is done for this specific board only as I do not have
other boards using this specific SoC.

The board now works correctly in 1000, 100 and 10 Mode

Signed-off-by: Koen Vandeputte <koen.vandeputte@ncentric.com>

diff --git a/target/linux/ar71xx/files/arch/mips/ath79/mach-rb91x.c b/target/linux/ar71xx/files/arch/mips/ath79/mach-rb91x.c
index 9620718962624d04e338ec06d131ada4fdb60cb3..f63ab4362a8de829d2e301bcbed2edfc3905b6f1 100644 (file)
--- a/target/linux/ar71xx/files/arch/mips/ath79/mach-rb91x.c
+++ b/target/linux/ar71xx/files/arch/mips/ath79/mach-rb91x.c
@@ -318,6 +318,7 @@ static void __init rb711gr100_setup(void)
        ath79_init_mac(ath79_eth0_data.mac_addr, ath79_mac_base, 0);
        ath79_eth0_data.phy_if_mode = PHY_INTERFACE_MODE_RGMII;
        ath79_eth0_data.phy_mask = BIT(0);
+       ath79_eth0_pll_data.pll_10 = 0x00001313;
        ath79_eth0_pll_data.pll_1000 = 0x02000000;
 
        ath79_register_eth(0);