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Message-ID: <Y9RDGnZLg6wGJWwn@francesco-nb.int.toradex.com> Date: Fri, 27 Jan 2023 22:33:14 +0100 From: Francesco Dolcini <francesco@...cini.it> To: linux-kernel@...r.kernel.org, Liam Girdwood <lgirdwood@...il.com>, Mark Brown <broonie@...nel.org> Subject: fixed-regulator with enable from another regulator Hello all, I am trying to figure out if it is possible with the current regulator-fixed or with any other solution already implemented in Linux to have a regulator enabled from another one. I am not talking about the regulator vin-supply, I am really talking about the enable input signal of a LDO connected to the output of another regulator, a sort of "chained" regulator. As an example something like this <reg_1v8>[out] ---> [vin-supply]<reg_1v0>[out] ---> <reg_3v3>[out] ---> [enable] <reg_1v8>[out] ---> [vin-supply]<reg_1v2>[out] ---> <reg_3v3>[out] ---> [enable] <gpio1> ---> [enable]<reg_3v3>[out]---> in which toggling <gpio1> control 3 different outputs. I am still not 100% sure if describing this specific hardware connection would be required on my system, maybe I can just ignore all of that. Any thought? Francesco
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