linux-kernel - Re: [PATCH v2 2/6] clk: Support bypassing dividers

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <162484857732.2516444.10099499446355358025@swboyd.mtv.corp.google.com>
Date:   Sun, 27 Jun 2021 19:49:37 -0700
From:   Stephen Boyd <sboyd@...nel.org>
To:     Michael Turquette <mturquette@...libre.com>,
        Paul Cercueil <paul@...pouillou.net>
Cc:     linux-clk@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-mips@...r.kernel.org,
        list@...ndingux.net,
        周琰杰 <zhouyanjie@...yeetech.com>,
        Paul Cercueil <paul@...pouillou.net>
Subject: Re: [PATCH v2 2/6] clk: Support bypassing dividers

Quoting Paul Cercueil (2021-05-30 09:49:19)
> When a clock is declared as both CGU_CLK_DIV and CGU_CLK_MUX, the CGU
> code expects the mux to be applied first, the divider second.
> 
> On the JZ4760, and maybe on some other SoCs, some clocks also have a mux
> setting and a divider, but the divider is not applied to all parents
> selectable from the mux.
> 
> This could be solved by creating two clocks, one with CGU_CLK_DIV and
> one with CGU_CLK_MUX, but that would increase the number of clocks.
> 
> Instead, add a 8-bit mask to CGU_CLK_DIV clocks. If the bit
> corresponding to the parent clock's index is set, the divider is
> bypassed.
> 
> Signed-off-by: Paul Cercueil <paul@...pouillou.net>
> ---

Applied to clk-next