linux-kernel - Re: [PATCH 1/3] clk: Add the flag CLK_ENABLE_MUTEX

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Date:   Wed, 2 Aug 2023 18:33:20 +0800
From:   Jie Luo <quic_luoj@...cinc.com>
To:     Stephen Boyd <sboyd@...nel.org>, <agross@...nel.org>,
        <andersson@...nel.org>, <conor+dt@...nel.org>,
        <konrad.dybcio@...aro.org>, <krzysztof.kozlowski+dt@...aro.org>,
        <mturquette@...libre.com>, <p.zabel@...gutronix.de>,
        <robh+dt@...nel.org>
CC:     <linux-arm-msm@...r.kernel.org>, <linux-clk@...r.kernel.org>,
        <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <quic_srichara@...cinc.com>
Subject: Re: [PATCH 1/3] clk: Add the flag CLK_ENABLE_MUTEX_LOCK of enabling
 clock



On 8/2/2023 3:18 AM, Stephen Boyd wrote:
> Quoting Luo Jie (2023-08-01 01:53:50)
>> Support the clock controller where the HW register is
>> accessed by MDIO bus, the spin lock can't be used because
>> of sleep during the MDIO operation.
>>
>> Add the flag CLK_ENABLE_MUTEX_LOCK to hint clock framework
>> to use mutex lock instead of the spin lock.
> 
> Why can't you enable the MDIO bus clk in .prepare()?

thanks Stephen for the suggestion, let me check this and update patchset.