[PATCH v4 0/3] Add bitbang feature for npcm8xx and driver

[Michael Chang]

I am resubmitting the patch titled "Add bitbang feature for npcm8xx
and driver" for review and inclusion in the upstream project.


Driver didn't support bitbang feature.
Add bb_miiphy_bus function for driver and open feature for npcm8xx

the log is as below:
-------------------------------------------------
U-Boot 2024.10-g30b9cdaf2df5-dirty (Jan 09 2025 - 00:57:37 +0000)

CPU-0: NPCM845 A1 @ Model: Nuvoton npcm845 Development Board (Device Tree)
DRAM:  1 GiB
RNG: NPCM RNG module bind OK
OTP: NPCM OTP module bind OK
AES: NPCM AES module bind OK
SHA: NPCM SHA module bind OK
I/TC: Reserved shared memory is enabled
I/TC: Dynamic shared memory is enabled
I/TC: Normal World virtualization support is disabled
I/TC: Asynchronous notifications are disabled
Core:  649 devices, 28 uclasses, devicetree: separate
WDT:   Not starting watchdog at 901c
MMC:   sdhci at f0842000: 0
Loading Environment from SPIFlash... SF:
Detected w25q512jvq with page size 256 Bytes, erase size 64 KiB,
total 64 MiB
OK
In:    serial at 0
Out:   serial at 0
Err:   serial at 0
Net:   eth0: eth at f0802000, eth1: eth at f0804000, eth3: eth at f0808000
Hit any key to stop autoboot:  0
U-Boot>
U-Boot>
U-Boot>setenv ipaddr 192.168.16.3
U-Boot>ping 192.168.16.12
eth at f0802000 Waiting for PHY auto negotiation to complete
......... TIMEOUT !
Could not initialize PHY eth at f0802000
eth at f0804000 Waiting for PHY auto negotiation to complete
......... TIMEOUT !
Could not initialize PHY eth at f0804000
Speed: 100, full duplex
Using eth at f0808000 device
host 192.168.16.12 is alive
-------------------------------------------------

Changes for v4:
    - Replece bitbang function prefix npcm to dw.

Changes for v3:
    - Support multiple buses for multiple Ethernet interfaces.

Changes for v2:
    - add bitbang delay dts read
    - modify printf to debug

Michael Chang (3):
  ARM: dts: nuvoton: Add bitbang delay through dts properties.
  ARM: configs: nuvoton: add bitbang feature for npcm8xx.
  net: designware: Add bitbang feature for designware driver.

 arch/arm/dts/nuvoton-npcm845-evb.dts |   1 +
 configs/arbel_evb_defconfig          |   4 +
 drivers/net/designware.c             | 113 +++++++++++++++++++++++++++
 drivers/net/designware.h             |   6 +-
 4 files changed, 123 insertions(+), 1 deletion(-)

-- 
2.34.1