From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Date: Fri, 28 Jul 2017 11:34:28 -0700 From: Stephen Boyd To: Abhishek Sahu Cc: mturquette@baylibre.com, andy.gross@linaro.org, david.brown@linaro.org, rnayak@codeaurora.org, linux-arm-msm@vger.kernel.org, linux-soc@vger.kernel.org, linux-clk@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [RFC 06/12] Clk: qcom: support for dynamic updating the PLL Message-ID: <20170728183428.GH2146@codeaurora.org> References: <1501153825-5181-1-git-send-email-absahu@codeaurora.org> <1501153825-5181-7-git-send-email-absahu@codeaurora.org> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 In-Reply-To: <1501153825-5181-7-git-send-email-absahu@codeaurora.org> List-ID: On 07/27, Abhishek Sahu wrote: > Some of the Alpha PLL’s support dynamic update in which the > frequency can be changed dynamically without turning off the PLL. > > This dynamic update requires the following sequence > > 1. Write the desired values to pll_l_val and pll_alpha_val. > 2. Toggle pll_latch_input from low to high. > 3. Wait for pll_ack_latch to transition from low to high. > The new L and alpha values have been latched. It make > take some time for the PLL to fully settle with these > new values. > 4. Pull pll_latch_input low. > > Signed-off-by: Abhishek Sahu I think Rajendra has a similar patch that was sent. Is this the same? Can you please look on the list and find it and compare? -- Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, a Linux Foundation Collaborative Project