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Re: [RFC 06/12] Clk: qcom: support for dynamic updating the PLL

From Stephen Boyd <sboyd@codeaurora.org>
Newsgroups linux.kernel
Subject Re: [RFC 06/12] Clk: qcom: support for dynamic updating the PLL
Date 2017-07-28 20:40 +0200
Message-ID <u8il4-7oj-15@gated-at.bofh.it> (permalink)
References <u7OZH-5qs-3@gated-at.bofh.it> <u7OZI-5qs-37@gated-at.bofh.it>
Organization linux.* mail to news gateway

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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 <absahu@codeaurora.org>

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

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Thread

[RFC 00/12] Misc patches for QCOM clocks Abhishek Sahu <absahu@codeaurora.org> - 2017-07-27 13:20 +0200
  [RFC 12/12] clk: qcom: add parent map for regmap mux Abhishek Sahu <absahu@codeaurora.org> - 2017-07-27 13:20 +0200
  [RFC 06/12] Clk: qcom: support for dynamic updating the PLL Abhishek Sahu <absahu@codeaurora.org> - 2017-07-27 13:20 +0200
    Re: [RFC 06/12] Clk: qcom: support for dynamic updating the PLL Stephen Boyd <sboyd@codeaurora.org> - 2017-07-28 20:40 +0200
      Re: [RFC 06/12] Clk: qcom: support for dynamic updating the PLL Abhishek Sahu <absahu@codeaurora.org> - 2017-07-30 16:00 +0200
  [RFC 11/12] clk: qcom: add read-only alpha pll post divider operations Abhishek Sahu <absahu@codeaurora.org> - 2017-07-27 13:20 +0200
  [RFC 10/12] clk: qcom: add read-only divider operations Abhishek Sahu <absahu@codeaurora.org> - 2017-07-27 13:20 +0200
  [RFC 07/12] clk: qcom: add flag for VCO operation Abhishek Sahu <absahu@codeaurora.org> - 2017-07-27 13:20 +0200
  [RFC 08/12] clk: qcom: support for Huayra PLL Abhishek Sahu <absahu@codeaurora.org> - 2017-07-27 13:20 +0200
  [RFC 05/12] clk: qcom: fix 16 bit alpha support calculation Abhishek Sahu <absahu@codeaurora.org> - 2017-07-27 13:20 +0200
  [RFC 09/12] clk: qcom: support for Brammo PLL Abhishek Sahu <absahu@codeaurora.org> - 2017-07-27 13:20 +0200
  Re: [RFC 00/12] Misc patches for QCOM clocks Stephen Boyd <sboyd@codeaurora.org> - 2017-07-27 20:40 +0200

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