Sagar Shrikant Kadam 7eef736858 dts: phy: fix missing mdio device and probe failure of vsc8541-01 device ... [ Upstream commit be969b7cfb ] HiFive unleashed A00 board has VSC8541-01 ethernet phy, this device is identified as a Revision B device as described in device identification registers. In order to use this phy in the unmanaged mode, it requires a specific reset sequence of logical 0-1-0-1 transition on the NRESET pin as documented here [1]. Currently, the bootloader (fsbl or u-boot-spl) takes care of the phy reset. If due to some reason the phy device hasn't received the reset by the prior stages before the linux macb driver comes into the picture, the MACB mii bus gets probed but the mdio scan fails and is not even able to read the phy ID registers. It gives an error message: "libphy: MACB_mii_bus: probed mdio_bus 10090000.ethernet-ffffffff: MDIO device at address 0 is missing." Thus adding the device OUI (Organizationally Unique Identifier) to the phy device node helps to probe the phy device. [1]: VSC8541-01 datasheet: https://www.mouser.com/ds/2/523/Microsemi_VSC8541-01_Datasheet_10496_V40-1148034.pdf Signed-off-by: Sagar Shrikant Kadam <sagar.kadam@sifive.com> Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com> Signed-off-by: Sasha Levin <sashal@kernel.org>		2021-01-27 11:47:45 +01:00
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dts	dts: phy: fix missing mdio device and probe failure of vsc8541-01 device	2021-01-27 11:47:45 +01:00
.gitignore	RISC-V: Build flat and compressed kernel images	2018-11-20 05:19:09 -08:00
Makefile	RISC-V: Build flat and compressed kernel images	2018-11-20 05:19:09 -08:00
install.sh	RISC-V: Build flat and compressed kernel images	2018-11-20 05:19:09 -08:00