linux-kernel - Re: [PATCH 2/4] regulator: core: notify regulator enable with the voltage value

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Date:   Mon, 16 Aug 2021 13:00:59 +0100
From:   Mark Brown <broonie@...nel.org>
To:     Jianqun Xu <jay.xu@...k-chips.com>
Cc:     lgirdwood@...il.com, ulf.hansson@...aro.org, lee.jones@...aro.org,
        zhangchangzhong@...wei.com, heiko@...ech.de,
        linux-rockchip@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/4] regulator: core: notify regulator enable with the
 voltage value

On Mon, Aug 16, 2021 at 11:20:01AM +0800, Jianqun Xu wrote:

> +			ret = _regulator_get_voltage(rdev);
> +			if (ret < 0)
> +				ret = 0;
> +
>  			_notifier_call_chain(rdev, REGULATOR_EVENT_ENABLE,
> -					     NULL);
> +					     &ret);

This is going to be really expensive for devices without a cache and
it's going to be *very* rarely used if ever.

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