Re: [PATCH v3 3/3] regulator: bd9571mwv: Document "backup_mode" sysfs file
From: Pavel Machek
Date: Sun Jul 15 2018 - 13:06:28 EST
On Fri 2018-07-13 17:47:20, Geert Uytterhoeven wrote:
> Signed-off-by: Geert Uytterhoeven <geert+renesas@xxxxxxxxx>
> + following steps must be followed exactly:
> + 1. Configure PMIC for backup mode, to change the role of
> + the accessory power switch from a power switch to a
> + wake-up switch,
> + 2. Switch accessory power switch off, to prepare for
> + system suspend, which is a manual step not controlled
> + by software,
> + 3. Suspend system,
> + 4. Switch accessory power switch on, to resume the
> + system.
> + DDR Backup Mode must be explicitly enabled by the user,
> + to invoke step 1.
I'd add "please don't design hardware like that" :-). Anyway,
Acked-by: Pavel Machek <pavel@xxxxxx>
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