From: Matti Vaittinen <mazziesaccount@gmail.com>
To: Benjamin Bara <bbara93@gmail.com>,
Liam Girdwood <lgirdwood@gmail.com>,
Mark Brown <broonie@kernel.org>
Cc: support.opensource@diasemi.com,
DLG-Adam.Ward.opensource@dm.renesas.com,
Martin Fuzzey <martin.fuzzey@flowbird.group>,
linux-kernel@vger.kernel.org,
Benjamin Bara <benjamin.bara@skidata.com>
Subject: Re: [PATCH RFC v4 07/13] regulator: find active protections during initialization
Date: Mon, 26 Jun 2023 16:56:21 +0300 [thread overview]
Message-ID: <030a99f7-98f3-a24d-612c-d460859fc276@gmail.com> (raw)
In-Reply-To: <20230419-dynamic-vmon-v4-7-4d3734e62ada@skidata.com>
On 6/20/23 23:03, Benjamin Bara wrote:
> From: Benjamin Bara <benjamin.bara@skidata.com>
>
> It can happen that monitors are activated before the kernel is started,
> e.g. by bootloader or by OTP. If monitoring workarounds are active on a
> regulator, the core shouldn't perform the state changes without applying
> the workaround to the regulator. Therefore, warn the user already during
> initialization that the device-tree should be adapted.
>
> Warning can be fixed by enabling (or disabling) monitoring in the DT,
> e.g.:
> regulator-uv-protection-microvolt = <1>;
> or
> regulator-ov-error-microvolt = <0>;
>
> Constraints regarding the monitoring of a regulator can usually be found
> in the docu.
I am not entirely sure if this is the right thing to do. Should we
expect the hardware state to be what is described in DT at Linux boot-up
- or, should we silently accept the fact that for example boot can alter
things.
From the 'code pov' I have no complaints though. I just can't say if
warning is the right idea. I'll leave this for bigger brains to decide :)
--
Matti Vaittinen
Linux kernel developer at ROHM Semiconductors
Oulu Finland
~~ When things go utterly wrong vim users can always type :help! ~~
next prev parent reply other threads:[~2023-06-26 13:56 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-06-20 20:02 [PATCH RFC v4 00/13] regulator: dynamic voltage monitoring support Benjamin Bara
2023-06-20 20:02 ` [PATCH RFC v4 01/13] regulator: da9063: fix null pointer deref with partial DT config Benjamin Bara
2023-06-20 20:02 ` [PATCH RFC v4 02/13] regulator: add getter for active monitors Benjamin Bara
2023-06-26 13:43 ` Matti Vaittinen
2023-06-26 16:37 ` Mark Brown
2023-06-20 20:02 ` [PATCH RFC v4 03/13] regulator: da9063: implement get_active_protections() Benjamin Bara
2023-06-20 20:02 ` [PATCH RFC v4 04/13] regulator: bd718x7: " Benjamin Bara
2023-06-26 13:45 ` Matti Vaittinen
2023-06-20 20:02 ` [PATCH RFC v4 05/13] regulator: introduce properties for monitoring workarounds Benjamin Bara
2023-06-26 13:47 ` Matti Vaittinen
2023-06-20 20:02 ` [PATCH RFC v4 06/13] regulator: set required ops " Benjamin Bara
2023-06-26 13:49 ` Matti Vaittinen
2023-06-20 20:03 ` [PATCH RFC v4 07/13] regulator: find active protections during initialization Benjamin Bara
2023-06-26 13:56 ` Matti Vaittinen [this message]
2023-06-26 16:49 ` Mark Brown
2023-07-03 18:43 ` Benjamin Bara
2023-07-04 13:49 ` Mark Brown
2023-06-20 20:03 ` [PATCH RFC v4 08/13] regulator: move monitor handling into own function Benjamin Bara
2023-06-26 14:04 ` Matti Vaittinen
2023-06-20 20:03 ` [PATCH RFC v4 09/13] regulator: implement mon_disable_reg_disabled Benjamin Bara
2023-07-03 10:31 ` Matti Vaittinen
2023-07-03 18:50 ` Benjamin Bara
2023-06-20 20:03 ` [PATCH RFC v4 10/13] regulator: implement mon_disable_reg_set_{higher,lower} Benjamin Bara
2023-07-03 10:45 ` Matti Vaittinen
2023-06-20 20:03 ` [PATCH RFC v4 11/13] regulator: implement mon_unsupported_reg_modes Benjamin Bara
2023-07-03 10:49 ` Matti Vaittinen
2023-06-20 20:03 ` [PATCH RFC v4 12/13] regulator: da9063: let the core handle the monitors Benjamin Bara
2023-06-20 20:03 ` [PATCH RFC v4 13/13] regulator: bd718x7: " Benjamin Bara
2023-07-03 11:02 ` Matti Vaittinen
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