linux-kernel - Re: [PATCH v2 3/3] clk: rockchip: rk3288: make all niu clocks critical

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: <CAFLEztTwyjqz0-2LriDp2WAyPR-g28RZT3VPA5vfSK5SSHTx8Q@mail.gmail.com>
Date:   Sun, 22 Jan 2017 17:02:17 +0800
From:   Jacob Chen <jacobchen110@...il.com>
To:     Heiko Stuebner <heiko@...ech.de>,
        Michael Turquette <mturquette@...libre.com>,
        sboyd@...eaurora.org
Cc:     linux-rockchip@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-clk@...r.kernel.org,
        zhangqing@...k-chips.com, Xing Zheng <zhengxing@...k-chips.com>,
        Jacob Chen <jacob-chen@...wrt.com>
Subject: Re: [PATCH v2 3/3] clk: rockchip: rk3288: make all niu clocks critical

2017-01-18 13:42 GMT+08:00 Jacob Chen <jacob-chen@...wrt.com>:
> NIU clocks are related to the interconnect and it's important to other blocks.
> Since we don't have a driver to handle it, we should always enable it to avoid
> casually close.
>
> Make all of them critical,so that we don't have to each clock on its own
> once things break.
>
> Signed-off-by: Jacob Chen <jacob-chen@...wrt.com>
> ---
>  drivers/clk/rockchip/clk-rk3288.c | 7 +++++++
>  1 file changed, 7 insertions(+)
>
> diff --git a/drivers/clk/rockchip/clk-rk3288.c b/drivers/clk/rockchip/clk-rk3288.c
> index 3d02aa2..c50386c 100644
> --- a/drivers/clk/rockchip/clk-rk3288.c
> +++ b/drivers/clk/rockchip/clk-rk3288.c
> @@ -808,8 +808,15 @@ static struct rockchip_clk_branch rk3288_clk_branches[] __initdata = {
>  static const char *const rk3288_critical_clocks[] __initconst = {
>         "aclk_cpu",
>         "aclk_peri",
> +       "aclk_peri_niu",
> +       "aclk_vio0_niu",
> +       "aclk_vio1_niu",
> +       "aclk_rga_niu",
>         "hclk_peri",
> +       "hclk_vio_niu",
> +       "pclk_alive_niu",
>         "pclk_pd_pmu",
> +       "pclk_pmu_niu",
>  };
>
>  static void __iomem *rk3288_cru_base;
> --
> 2.7.4
>

I just got an another bug that caused by closed niu clock.
Making niu clock always enabled is really useful, it could save me a
lot of time.....

I just wonder why we don't do that before.  Would it have great impact
on power consumption?