[openwrt/openwrt] ar71xx: mikrotik: rb91x: fix 10M ethernet link speed

[LEDE Commits]

xback pushed a commit to openwrt/openwrt.git, branch openwrt-19.07:
https://git.openwrt.org/5e8b9624f1791d193e8d5e007ce4c873454f014a

commit 5e8b9624f1791d193e8d5e007ce4c873454f014a
Author: Koen Vandeputte <koen.vandeputte at ncentric.com>
AuthorDate: Tue Oct 12 11:02:30 2021 +0200

    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 at ncentric.com>
---
 target/linux/ar71xx/files/arch/mips/ath79/mach-rb91x.c | 1 +
 1 file changed, 1 insertion(+)

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 9620718962..f63ab4362a 100644
--- 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);