linux-kernel - Re: [PATCH 1/4] clk: JZ4780: Add function for disable the second core.

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Date:   Wed, 02 Dec 2020 22:21:40 +0000
From:   Paul Cercueil <paul@...pouillou.net>
To:     周琰杰 <zhouyanjie@...yeetech.com>
Cc:     sboyd@...nel.org, robh+dt@...nel.org, mturquette@...libre.com,
        linux-kernel@...r.kernel.org, linux-clk@...r.kernel.org,
        devicetree@...r.kernel.org, dongsheng.qiu@...enic.com,
        aric.pzqi@...enic.com, rick.tyliu@...enic.com,
        yanfei.li@...enic.com, sernia.zhou@...mail.com,
        zhenwenjin@...il.com
Subject: Re: [PATCH 1/4] clk: JZ4780: Add function for disable the second
 core.

Hi,

Le jeu. 26 nov. 2020 à 1:26, 周琰杰 (Zhou Yanjie) 
<zhouyanjie@...yeetech.com> a écrit :
> Add "jz4780_core1_disable()" for disable the second core of JZ4780,
> prepare for later commits.
> 
> Signed-off-by: 周琰杰 (Zhou Yanjie) <zhouyanjie@...yeetech.com>

Reviewed-by: Paul Cercueil <paul@...pouillou.net>

Stephen: this patch can be merged independently of the others.

Cheers,
-Paul

> ---
>  drivers/clk/ingenic/jz4780-cgu.c | 21 +++++++++++++++++++++
>  1 file changed, 21 insertions(+)
> 
> diff --git a/drivers/clk/ingenic/jz4780-cgu.c 
> b/drivers/clk/ingenic/jz4780-cgu.c
> index 0268d23..dcca74e 100644
> --- a/drivers/clk/ingenic/jz4780-cgu.c
> +++ b/drivers/clk/ingenic/jz4780-cgu.c
> @@ -252,8 +252,29 @@ static int jz4780_core1_enable(struct clk_hw *hw)
>  	return 0;
>  }
> 
> +static void jz4780_core1_disable(struct clk_hw *hw)
> +{
> +	struct ingenic_clk *ingenic_clk = to_ingenic_clk(hw);
> +	struct ingenic_cgu *cgu = ingenic_clk->cgu;
> +	unsigned long flags;
> +	u32 lcr, clkgr1;
> +
> +	spin_lock_irqsave(&cgu->lock, flags);
> +
> +	lcr = readl(cgu->base + CGU_REG_LCR);
> +	lcr |= LCR_PD_SCPU;
> +	writel(lcr, cgu->base + CGU_REG_LCR);
> +
> +	clkgr1 = readl(cgu->base + CGU_REG_CLKGR1);
> +	clkgr1 |= CLKGR1_CORE1;
> +	writel(clkgr1, cgu->base + CGU_REG_CLKGR1);
> +
> +	spin_unlock_irqrestore(&cgu->lock, flags);
> +}
> +
>  static const struct clk_ops jz4780_core1_ops = {
>  	.enable = jz4780_core1_enable,
> +	.disable = jz4780_core1_disable,
>  };
> 
>  static const s8 pll_od_encoding[16] = {
> --
> 2.7.4
>