[beagleboard] AM3352: Upgrading Kernel from 3.14 to 5.4, Ethernet operating differently

[anthony . h . barrera]

Hello,


In 2015 my company developed a custom board based on the Beaglebone Black (
AM3352 ) using the 3.14 kernel from 
https://github.com/beagleboard/linux. We now need to update to the 5.4 
kernel. We have attempted to port our kernel source and device tree 
customization into the 5.4.0 kernel that we got from 
https://github.com/beagleboard/linux, and are currently configuring the 5.4 
kernel with the same config file we used for 3.14. 


Not surprisingly, various components in our system were not working, and we 
are slowly working through these issues.

I have recently gotten the Ethernet functioning, but in 3.14 we had setup 
the Ethernet to be interrupt driven. In 5.4, it appears that the Ethernet 
is using polling:

cpsw 4a10.ethernet: initializing cpsw version 1.12 (0)
Generic PHY 4a101000.mdio:03: attached PHY driver [Generic PHY] 
(mii_bus:phy_addr=4a101000.mdio:03, irq=POLL)
cpsw 4a10.ethernet eth0: Link is Up - 100Mbps/Full - flow control off
net eth1: initializing cpsw version 1.12 (0)
Generic PHY 4a101000.mdio:07: attached PHY driver [Generic PHY] 
(mii_bus:phy_addr=4a101000.mdio:07, irq=POLL)

Also, in /proc/interrupts I do not see interrupts setup for the Ethernet. 
In our previous 3.14 kernel, interrupts are setup for 40-43.


Here is the relevant piece of my device tree taken from am33xx-l4.dtsi

mac: ethernet@0 {
dual_emac = <1>;
compatible = "ti,am335x-cpsw","ti,cpsw";
//ti,hwmods = "cpgmac0";
clocks = <&cpsw_125mhz_gclk>, <&cpsw_cpts_rft_clk>;
clock-names = "fck", "cpts";
cpdma_channels = <8>;
ale_entries = <1024>;
bd_ram_size = <0x2000>;
mac_control = <0x20>;
slaves = <2>;
active_slave = <0>;
cpts_clock_mult = <0x8000>;
cpts_clock_shift = <29>;
reg = <0x0 0x800
   0x1200 0x100>;
#address-cells = <1>;
#size-cells = <1>;
interrupt-parent = <&intc>;
/*
 * c0_rx_thresh_pend
 * c0_rx_pend
 * c0_tx_pend
 * c0_misc_pend
 */
interrupts = <40 41 42 43>;
ranges = <0 0 0x8000>;
syscon = <&scm_conf>;

davinci_mdio: mdio@1000 {
compatible = "ti,cpsw-mdio","ti,davinci_mdio";
clocks = <&cpsw_125mhz_clkctrl 
AM3_CPSW_125MHZ_CPGMAC0_CLKCTRL 0>;
clock-names = "fck";
#address-cells = <1>;
#size-cells = <0>;
bus_freq = <100>;
reg = <0x1000 0x100>;
};

cpsw_emac0: slave@200 {
/* Filled in by U-Boot */
mac-address = [ 00 00 00 00 00 00 ];
   dual_emac_res_vlan = <1>;
phys = <&phy_gmii_sel 1 1>;
};

cpsw_emac1: slave@300 {
/* Filled in by U-Boot */
mac-address = [ 00 00 00 00 00 00 ];
dual_emac_res_vlan = <2>;
phys = <&phy_gmii_sel 2 1>;
};
};


This block was ported in from our 3.14 kernel, with modifications we felt 
needed. You can see that the block references our interrupt controller 
intc, and interrupts 40-43 are defined. If anyone has any tips on what I 
might be doing wrong here it would be greatly appreciated, thank you in 
advance! - Anthony

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[beagleboard] Beaglebone Black Kernel Upgrade (NAND not detected)

[anthony . h . barrera]

Hello,

In 2015 my company developed a custom board based on the Beaglebone Black 
using the 3.14 kernel from https://github.com/beagleboard/linux. We now 
need to update to the 5.4 kernel. We have attempted to port our kernel 
source and device tree customization into the 5.4.0 kernel that we got 
from https://github.com/beagleboard/linux, and are currently configuring 
the 5.4 kernel with the same config file we used for 3.14. Although the 
system boots, not surprisingly most of our customizations are not 
functioning.

In particular, our kernel cannot detect our NAND flash (AMD/Spansion 
S34ML01G2). Wondering if anyone can point me to any resources that might 
help me through the process of configuring this 5.4 kernel to work with my 
flash part?

Any help would be greatly appreciated, thank you!

Anthony

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