linux-kernel - Re: [PATCH v2 2/2] regulator: Add TPS65185 driver

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Message-ID: <9ab5bb73-6237-4348-a62a-a61af4d4704e@t-online.de>
Date: Sat, 27 Dec 2025 17:33:56 +0100
From: Josua Mayer <josua.m@...nline.de>
To: Andreas Kemnade <andreas@...nade.info>,
 Liam Girdwood <lgirdwood@...il.com>, Mark Brown <broonie@...nel.org>,
 Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>,
 Conor Dooley <conor+dt@...nel.org>, Guenter Roeck <linux@...ck-us.net>
Cc: linux-kernel@...r.kernel.org, devicetree@...r.kernel.org,
 linux-hwmon@...r.kernel.org
Subject: Re: [PATCH v2 2/2] regulator: Add TPS65185 driver

Am 27.12.25 um 11:20 schrieb Andreas Kemnade:

> Add a driver for the TPS65185 regulator. Implement handling of the various
> gpio pins. Because the PWRUP (=enable) pin functionality can be achieved
> by just using two bits instead, just ensure that it is set to a stable
> value.
> Implement the pair of symmetric LDOs as a single regulator because they
> share a single voltage set register. As the VCOM regulator sits behind that
> machinery, just define that one as a supply.
> For simplicity, just add the temperature sensor (depending on external NTC)
> directly.
>
> There is a mechanism to measure some kick-back voltage during a defined EPD
> operation, to calibrate the VCOM voltage setting and store that
> non-volatile in the chip to be the power up default setup. That is not
> implemented yet in the driver, but that also means that there is a
> non-factory default value in these registers after power-up.
>
> Signed-off-by: Andreas Kemnade <andreas@...nade.info>
> ---
>   drivers/regulator/Kconfig    |  11 ++
>   drivers/regulator/Makefile   |   1 +
>   drivers/regulator/tps65185.c | 454 +++++++++++++++++++++++++++++++++++++++++++
>   3 files changed, 466 insertions(+)

Tested on Kobo Aura (N514).

Tested-by: Josua Mayer <josua.mayer@....eu>