Messages in this thread | | | From | Philippe Schenker <> | Subject | [PATCH net-next 0/3] Add Possiblity to Reset PHY After Power-up | Date | Tue, 14 Dec 2021 13:16:35 +0100 |
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We do have a hardware design in which the ethernet phy regulator and reset are controlled by software. The ethernet PHY is a Microchip KSZ9131 [1] and the power sequencing requires a reset after the power goes up.
In our case the ethernet PHY is connected to a Freescale FEC and the driver is shutting down the regulator on suspend, however on the resume path the reset signal is never asserted and because of that the ethernet is not working anymore.
To solve this adds a new phy_reset_after_power_on() function, similar to the existing phy_reset_after_clk_enable(), and call it in the fec resume path after the regulator is switched on as suggested by Joakim Zhang <qiangqing.zhang@nxp.com>.
[1] https://ww1.microchip.com/downloads/en/DeviceDoc/00002841C.pdf
Philippe Schenker (3): net: phy: add phy_reset_after_power_on() function net: phy: micrel: add reset-after-power-on flag to ksz9x31 phys net: fec: reset phy on resume after power-up
drivers/net/ethernet/freescale/fec_main.c | 1 + drivers/net/phy/micrel.c | 2 ++ drivers/net/phy/phy_device.c | 24 +++++++++++++++++++++++ include/linux/phy.h | 2 ++ 4 files changed, 29 insertions(+)
-- 2.34.1
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