linux-kernel - Re: [PATCH v2 03/18] clk: qcom: reset: Ensure write completion on reset de/assertion

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Date: Wed, 7 Feb 2024 12:52:53 +0100
From: Konrad Dybcio <konrad.dybcio@...aro.org>
To: Johan Hovold <johan@...nel.org>
Cc: Bjorn Andersson <andersson@...nel.org>,
 Michael Turquette <mturquette@...libre.com>, Stephen Boyd
 <sboyd@...nel.org>, Philipp Zabel <p.zabel@...gutronix.de>,
 Marijn Suijten <marijn.suijten@...ainline.org>,
 linux-arm-msm@...r.kernel.org, linux-clk@...r.kernel.org,
 linux-kernel@...r.kernel.org, Bryan O'Donoghue <bryan.odonoghue@...aro.org>,
 Dikshita Agarwal <quic_dikshita@...cinc.com>,
 Vikash Garodia <quic_vgarodia@...cinc.com>,
 Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
Subject: Re: [PATCH v2 03/18] clk: qcom: reset: Ensure write completion on
 reset de/assertion

On 7.02.2024 10:07, Johan Hovold wrote:
> On Tue, Feb 06, 2024 at 07:43:36PM +0100, Konrad Dybcio wrote:
>> Trying to toggle the resets in a rapid fashion can lead to the changes
>> not actually arriving at the clock controller block when we expect them
>> to. This was observed at least on SM8250.
>>
>> Read back the value after regmap_update_bits to ensure write completion.
>>
>> Fixes: db1029814f1f ("clk: qcom: reset: Ensure write completion on reset de/assertion")
> 
> This commit does not exist in mainline or linux-next it seems.

Yeah, I managed to copy the last and not the first commit hash concerning
reset.c :/

Konrad