From: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
To: Chen-Yu Tsai <wenst@chromium.org>, Lee Jones <lee@kernel.org>,
Rob Herring <robh+dt@kernel.org>,
Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
Conor Dooley <conor+dt@kernel.org>,
Mark Brown <broonie@kernel.org>,
Liam Girdwood <lgirdwood@gmail.com>,
Matthias Brugger <matthias.bgg@gmail.com>
Cc: devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
linux-mediatek@lists.infradead.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH RESEND v2 4/7] regulator: mt6358: Fail probe on unknown chip ID
Date: Fri, 21 Jul 2023 10:53:46 +0200 [thread overview]
Message-ID: <24952eda-9821-4634-aaa4-e636119f99fd@collabora.com> (raw)
In-Reply-To: <20230721082903.2038975-5-wenst@chromium.org>
Il 21/07/23 10:28, Chen-Yu Tsai ha scritto:
> The MT6358 and MT6366 PMICs, and likely many others from MediaTek, have
> a chip ID register, making the chip semi-discoverable.
>
> The driver currently supports two PMICs and expects to be probed on one
> or the other. It does not account for incorrect mfd driver entries or
> device trees. While these should not happen, if they do, it could be
> catastrophic for the device. The driver should be sure the hardware is
> what it expects.
>
> Make the driver fail to probe if the chip ID presented is not a known
> one.
>
> Suggested-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
> Fixes: f0e3c6261af1 ("regulator: mt6366: Add support for MT6366 regulator")
> Signed-off-by: Chen-Yu Tsai <wenst@chromium.org>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
next prev parent reply other threads:[~2023-07-21 8:54 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-07-21 8:28 [PATCH RESEND v2 0/7] regulator: mt6358: Remove bogus regulators and improvements Chen-Yu Tsai
2023-07-21 8:28 ` [PATCH RESEND v2 1/7] mfd: mt6358: Add missing registers for LDO voltage calibration Chen-Yu Tsai
2023-07-21 8:53 ` AngeloGioacchino Del Regno
2023-07-21 8:28 ` [PATCH RESEND v2 2/7] regulator: mt6358: Sync VCN33_* enable status after checking ID Chen-Yu Tsai
2023-07-21 8:53 ` AngeloGioacchino Del Regno
2023-07-21 8:28 ` [PATCH RESEND v2 3/7] regulator: mt6358: Fix incorrect VCN33 sync error message Chen-Yu Tsai
2023-07-21 8:53 ` AngeloGioacchino Del Regno
2023-07-21 8:28 ` [PATCH RESEND v2 4/7] regulator: mt6358: Fail probe on unknown chip ID Chen-Yu Tsai
2023-07-21 8:53 ` AngeloGioacchino Del Regno [this message]
2023-07-21 8:28 ` [PATCH RESEND v2 5/7] regulator: mt6358: Add output voltage fine tuning to fixed regulators Chen-Yu Tsai
2023-07-21 8:28 ` [PATCH RESEND v2 6/7] regulator: mt6358: Add output voltage fine tuning to variable LDOs Chen-Yu Tsai
2023-07-21 8:28 ` [PATCH RESEND v2 7/7] arm64: dts: mediatek: mt6358: Merge ldo_vcn33_* regulators Chen-Yu Tsai
2023-07-21 8:53 ` AngeloGioacchino Del Regno
2023-07-24 12:14 ` (subset) [PATCH RESEND v2 0/7] regulator: mt6358: Remove bogus regulators and improvements Mark Brown
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