linux-kernel - Re: [RFC PATCH v3 net-next 01/11] net: ethernet: ti: cpts: use devm_get_clk_from

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Message-ID: <20190424224607.GB23779@lunn.ch>
Date:   Thu, 25 Apr 2019 00:46:07 +0200
From:   Andrew Lunn <andrew@...n.ch>
To:     Grygorii Strashko <grygorii.strashko@...com>
Cc:     netdev@...r.kernel.org,
        Ilias Apalodimas <ilias.apalodimas@...aro.org>,
        "David S . Miller" <davem@...emloft.net>,
        Ivan Khoronzhuk <ivan.khoronzhuk@...aro.org>,
        Jiri Pirko <jiri@...nulli.us>,
        Florian Fainelli <f.fainelli@...il.com>,
        Sekhar Nori <nsekhar@...com>, linux-kernel@...r.kernel.org,
        linux-omap@...r.kernel.org, Murali Karicheri <m-karicheri2@...com>,
        Ivan Vecera <ivecera@...hat.com>
Subject: Re: [RFC PATCH v3 net-next 01/11] net: ethernet: ti: cpts: use
 devm_get_clk_from_child

On Thu, Apr 25, 2019 at 01:24:17AM +0300, Grygorii Strashko wrote:
> Use devm_get_clk_from_child() instead of devm_clk_get() and this way allow
> to group CPTS DT properties in sub-node for better code readability and
> maintenance.
> 
> Signed-off-by: Grygorii Strashko <grygorii.strashko@...com>
> ---
>  drivers/net/ethernet/ti/cpts.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/net/ethernet/ti/cpts.c b/drivers/net/ethernet/ti/cpts.c
> index 499806ce4cd5..aad118e71b61 100644
> --- a/drivers/net/ethernet/ti/cpts.c
> +++ b/drivers/net/ethernet/ti/cpts.c
> @@ -572,7 +572,7 @@ struct cpts *cpts_create(struct device *dev, void __iomem *regs,
>  	if (ret)
>  		return ERR_PTR(ret);
>  
> -	cpts->refclk = devm_clk_get(dev, "cpts");
> +	cpts->refclk = devm_get_clk_from_child(dev, node, "cpts");
>  	if (IS_ERR(cpts->refclk)) {
>  		dev_err(dev, "Failed to get cpts refclk\n");
>  		return ERR_CAST(cpts->refclk);

Hi Grygorii

Does this break backwards compatibility for existing DT blobs?
Maybe you need to look in both the old and new locations?

      Andrew