linux-kernel - Re: [PATCH for 4.9 07/59] clk: sunxi-ng: set the parent rate when adjustin CPUX clock on A33

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Date:   Fri, 15 Sep 2017 10:02:04 +0800
From:   icenowy@...c.io
To:     "Levin, Alexander (Sasha Levin)" <alexander.levin@...izon.com>
Cc:     linux-kernel@...r.kernel.org, stable@...r.kernel.org,
        Icenowy Zheng <icenowy@...c.xyz>,
        Maxime Ripard <maxime.ripard@...e-electrons.com>
Subject: Re: [PATCH for 4.9 07/59] clk: sunxi-ng: set the parent rate when
 adjustin CPUX clock on A33

在 2017-09-14 23:51，Levin, Alexander (Sasha Levin) 写道：
> From: Icenowy Zheng <icenowy@...c.xyz>
> 
> [ Upstream commit bb021cda2ccf45ee9470bf0f8c55323ad1c761ae ]

As DVFS for A33 doesn't exist in 4.9, this patch doesn't affect 4.9
at all.

> 
> The CPUX clock on A33, which is for the Cortex-A7 cores, is designed to
> be changeable by changing the rate of PLL_CPUX.
> 
> Add CLK_SET_RATE_PARENT flag to this clock.
> 
> Signed-off-by: Icenowy Zheng <icenowy@...c.xyz>
> Signed-off-by: Maxime Ripard <maxime.ripard@...e-electrons.com>
> Signed-off-by: Sasha Levin <alexander.levin@...izon.com>
> ---
>  drivers/clk/sunxi-ng/ccu-sun8i-a33.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/clk/sunxi-ng/ccu-sun8i-a33.c
> b/drivers/clk/sunxi-ng/ccu-sun8i-a33.c
> index 9bd1f78a0547..d54e5db3959a 100644
> --- a/drivers/clk/sunxi-ng/ccu-sun8i-a33.c
> +++ b/drivers/clk/sunxi-ng/ccu-sun8i-a33.c
> @@ -170,7 +170,7 @@ static SUNXI_CCU_N_WITH_GATE_LOCK(pll_ddr1_clk, 
> "pll-ddr1",
>  static const char * const cpux_parents[] = { "osc32k", "osc24M",
>  					     "pll-cpux" , "pll-cpux" };
>  static SUNXI_CCU_MUX(cpux_clk, "cpux", cpux_parents,
> -		     0x050, 16, 2, CLK_IS_CRITICAL);
> +		     0x050, 16, 2, CLK_IS_CRITICAL | CLK_SET_RATE_PARENT);
> 
>  static SUNXI_CCU_M(axi_clk, "axi", "cpux", 0x050, 0, 2, 0);