linux-kernel - Re: [PATCH] mtd: rawnand: meson: fix the clock after discarding sd_emmc_c

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Date:   Fri, 7 Jan 2022 12:08:39 +0800
From:   Liang Yang <liang.yang@...ogic.com>
To:     Miquel Raynal <miquel.raynal@...tlin.com>
CC:     <linux-mtd@...ts.infradead.org>,
        Richard Weinberger <richard@....at>,
        Jerome Brunet <jbrunet@...libre.com>,
        Neil Armstrong <narmstrong@...libre.com>,
        Martin Blumenstingl <martin.blumenstingl@...glemail.com>,
        Kevin Hilman <khilman@...libre.com>,
        Jianxin Pan <jianxin.pan@...ogic.com>,
        Victor Wan <victor.wan@...ogic.com>,
        XianWei Zhao <xianwei.zhao@...ogic.com>,
        Kelvin Zhang <kelvin.zhang@...ogic.com>,
        BiChao Zheng <bichao.zheng@...ogic.com>,
        YongHui Yu <yonghui.yu@...ogic.com>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-amlogic@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>, <devicetree@...r.kernel.org>
Subject: Re: [PATCH] mtd: rawnand: meson: fix the clock after discarding
 sd_emmc_c_clkc

Hi Miquel,

refine the clock framework diagram.

On 2022/1/7 10:40, Liang Yang wrote:
>> What is nand_divider?
> i simplify our clock framework below, so nand divider is 
> SD_EMMC_CLOCK[5:0] here.
>                 -----          -----            -----
>         the other------|    \        |     |       |     |
>                     | mux    | -----  |  N  | ----------| NFC/|
>         FCLK_DIV2------|     |        |     |       | EMMC|
>                 -----/         -----         -----
>              SD_EMMC_CLOCK[7:6] SD_EMMC_CLOCK[5:0]


                          -----           -------         --------
               the other-|      \        |       |       |        |
                         | mux  |--------|  N    |-------|   NFC/ |
                         |      |        |       |       |   EMMC |
               fclk_div2-|      /        |       |       |        |
                          -----           -------         --------
                   SD_EMMC_CLOCK[7:6]   SD_EMMC_CLOCK[5:0]