Re: [PATCH net-next 2/4] net-next: mediatek: add platform data to adapt into various hardware

[Florian Fainelli <f.fainelli@gmail.com>]

On 07/11/2017 08:37 PM, sean.wang@mediatek.com wrote:
> From: Sean Wang <sean.wang@mediatek.com>
> 
> This patch is the preparation patch in order to adapt into various
> hardware through adding platform data which holds specific characteristics
> among MediaTek SoCs and introducing the unified clock handler for those
> distinct clock requirements depending on different features such as
> TRGMII and SGMII getting support on the target SoC. And finally, add
> enhancement with given the generic description for Kconfig and remove the
> unnecessary machine type dependency in Makefile.
> 
> Signed-off-by: Sean Wang <sean.wang@mediatek.com>
> ---

>  	if (dev->phydev->link)
> @@ -1837,6 +1838,39 @@ static void ethsys_reset(struct mtk_eth *eth, u32 reset_bits)
>  	mdelay(10);
>  }
>  
> +static void mtk_clk_disable(struct mtk_eth *eth)
> +{
> +	int clk;
> +
> +	for (clk = MTK_CLK_MAX - 1; clk >= 0; clk--) {
> +		if (eth->clks[clk])
> +			clk_disable_unprepare(eth->clks[clk]);
> +	}

The clock framework works just fine with NULL clk references, no need to
check that.

> +}

There are now (or will be soon in clk-next) bulk accessors that you may
consider using for this.

> +
> +static int mtk_clk_enable(struct mtk_eth *eth)
> +{
> +	int clk, ret;
> +
> +	for (clk = 0; clk < MTK_CLK_MAX ; clk++) {
> +		if (eth->clks[clk]) {
> +			ret = clk_prepare_enable(eth->clks[clk]);
> +			if (ret)
> +				goto err_disable_clks;
> +		}
> +	}

Same here.
-- 
Florian