Our hardware has a FET that is switching power rail of the ethernet PHY on and off. This switching enable signal is a clock from the SoC. There is no possibility in regulator subsystem to have this hardware reflected in software. I already discussed with Mark Brown about possible solutions and he suggested to create at least a new compatible. [1] This discussion includes also a better explanation of our circuit as well as schematics. So please refer to that link if you have questions about that. In this first attempt I created a new binding "regulator-fixed-clock" that can take a clock from devicetree. This is a simple addition to regulator-fixed. If the binding regulator-fixed-clock is given, the clock is simply enabled on regulator enable and disabled on regulator disable. To be able to have multiple consumers a counter variable is also given that tells how many consumers need power from this regulator. Best regards, Philippe [1] https://lkml.org/lkml/2019/8/7/78 Changes in v2: - return priv->clk_enable_counter > 0 directly. - Change select: to if: - Change items: to enum: - Defined how many clocks should be given Philippe Schenker (3): regulator: fixed: add possibility to enable by clock ARM: dts: imx6ull-colibri: add phy-supply and respective regulator dt-bindings: regulator: add regulator-fixed-clock binding .../bindings/regulator/fixed-regulator.yaml | 19 ++++- arch/arm/boot/dts/imx6ull-colibri.dtsi | 12 +++ drivers/regulator/fixed.c | 83 ++++++++++++++++++- 3 files changed, 110 insertions(+), 4 deletions(-) -- 2.23.0
