linux-kernel - Re: [PATCH v5] clk: qcom: ipq4019: Add the cpu clock frequency change notifier

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Message-ID: <20161227214544.GF8288@codeaurora.org>
Date:   Tue, 27 Dec 2016 13:45:44 -0800
From:   Stephen Boyd <sboyd@...eaurora.org>
To:     Abhishek Sahu <absahu@...eaurora.org>
Cc:     mturquette@...libre.com, andy.gross@...aro.org,
        david.brown@...aro.org, varada@...eaurora.org,
        snlakshm@...eaurora.org, pradeepb@...eaurora.org,
        linux-arm-msm@...r.kernel.org, linux-soc@...r.kernel.org,
        linux-clk@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v5] clk: qcom: ipq4019: Add the cpu clock frequency
 change notifier

On 12/22, Abhishek Sahu wrote:
> The current driver code gives the crash or gets hang while switching
> the CPU frequency some time. The APSS CPU Clock divider is not glitch
> free so it the APPS clock need to be switched for stable clock during
> the change.
> 
> This patch adds the frequency change notifier for APSS CPU clock. It
> changes the parent of this clock to stable PLL FEPLL500 for
> PRE_RATE_CHANGE event. This event will be generated before actual
> clock set operations. The clock set operation will again change its
> corresponding parent by getting the same from frequency table.
> 
> Signed-off-by: Abhishek Sahu <absahu@...eaurora.org>
> ---

Applied to clk-ipq4019 and merged into clk-next.

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