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

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Message-ID: <ZcNIT-NxKSZ44NjZ@hovoldconsulting.com>
Date: Wed, 7 Feb 2024 10:07:27 +0100
From: Johan Hovold <johan@...nel.org>
To: Konrad Dybcio <konrad.dybcio@...aro.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 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.

Johan