Re: [PATCH 0/2] regulator: Add MPS MPQ4210 buck-boost regulator support

[Mark Brown]

On Thu, Sep 10, 2026 at 08:51:40AM +0000, Tapio Reijonen wrote:

> One consequence of the hardware worth spelling out: the MPQ4210 does not
> respond on the I2C bus while EN is deasserted. The enable GPIO is
> therefore claimed and asserted before the first register access and held
> for the lifetime of the device, rather than being handed to the core as
> regulator_config::ena_gpiod, which would drop the bus along with the
> output.

This is what regmap's cache only mode is for.

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