linux-kernel - Re: [PATCH 3/5] soc/fsl/qe: qe.c: introduce qe_get_device

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Message-ID: <263abc47-3334-01b5-49ca-2d876a9ea537@c-s.fr>
Date:   Tue, 30 Apr 2019 19:14:11 +0200
From:   Christophe Leroy <christophe.leroy@....fr>
To:     Rasmus Villemoes <rasmus.villemoes@...vas.dk>,
        Qiang Zhao <qiang.zhao@....com>, Li Yang <leoyang.li@....com>
Cc:     Valentin Longchamp <valentin.longchamp@...mile.com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Scott Wood <oss@...error.net>,
        Rasmus Villemoes <Rasmus.Villemoes@...vas.se>,
        Rob Herring <robh+dt@...nel.org>,
        "linuxppc-dev@...ts.ozlabs.org" <linuxppc-dev@...ts.ozlabs.org>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH 3/5] soc/fsl/qe: qe.c: introduce qe_get_device_node helper



Le 30/04/2019 à 15:36, Rasmus Villemoes a écrit :
> The 'try of_find_compatible_node(NULL, NULL, "fsl,qe"), fall back to
> of_find_node_by_type(NULL, "qe")' pattern is repeated five
> times. Factor it into a common helper.
> 
> Signed-off-by: Rasmus Villemoes <rasmus.villemoes@...vas.dk>

Reviewed-by: Christophe Leroy <christophe.leroy@....fr>


> ---
>   drivers/soc/fsl/qe/qe.c | 71 +++++++++++++++++------------------------
>   1 file changed, 29 insertions(+), 42 deletions(-)
> 
> diff --git a/drivers/soc/fsl/qe/qe.c b/drivers/soc/fsl/qe/qe.c
> index d0393f83145c..aff9d1373529 100644
> --- a/drivers/soc/fsl/qe/qe.c
> +++ b/drivers/soc/fsl/qe/qe.c
> @@ -56,6 +56,20 @@ static unsigned int qe_num_of_snum;
>   
>   static phys_addr_t qebase = -1;
>   
> +static struct device_node *qe_get_device_node(void)
> +{
> +	struct device_node *qe;
> +
> +	/*
> +	 * Newer device trees have an "fsl,qe" compatible property for the QE
> +	 * node, but we still need to support older device trees.
> +	 */
> +	qe = of_find_compatible_node(NULL, NULL, "fsl,qe");
> +	if (qe)
> +		return qe;
> +	return of_find_node_by_type(NULL, "qe");
> +}
> +
>   static phys_addr_t get_qe_base(void)
>   {
>   	struct device_node *qe;
> @@ -65,12 +79,9 @@ static phys_addr_t get_qe_base(void)
>   	if (qebase != -1)
>   		return qebase;
>   
> -	qe = of_find_compatible_node(NULL, NULL, "fsl,qe");
> -	if (!qe) {
> -		qe = of_find_node_by_type(NULL, "qe");
> -		if (!qe)
> -			return qebase;
> -	}
> +	qe = qe_get_device_node();
> +	if (!qe)
> +		return qebase;
>   
>   	ret = of_address_to_resource(qe, 0, &res);
>   	if (!ret)
> @@ -164,12 +175,9 @@ unsigned int qe_get_brg_clk(void)
>   	if (brg_clk)
>   		return brg_clk;
>   
> -	qe = of_find_compatible_node(NULL, NULL, "fsl,qe");
> -	if (!qe) {
> -		qe = of_find_node_by_type(NULL, "qe");
> -		if (!qe)
> -			return brg_clk;
> -	}
> +	qe = qe_get_device_node();
> +	if (!qe)
> +		return brg_clk;
>   
>   	prop = of_get_property(qe, "brg-frequency", &size);
>   	if (prop && size == sizeof(*prop))
> @@ -563,16 +571,9 @@ struct qe_firmware_info *qe_get_firmware_info(void)
>   
>   	initialized = 1;
>   
> -	/*
> -	 * Newer device trees have an "fsl,qe" compatible property for the QE
> -	 * node, but we still need to support older device trees.
> -	*/
> -	qe = of_find_compatible_node(NULL, NULL, "fsl,qe");
> -	if (!qe) {
> -		qe = of_find_node_by_type(NULL, "qe");
> -		if (!qe)
> -			return NULL;
> -	}
> +	qe = qe_get_device_node();
> +	if (!qe)
> +		return NULL;
>   
>   	/* Find the 'firmware' child node */
>   	fw = of_get_child_by_name(qe, "firmware");
> @@ -618,16 +619,9 @@ unsigned int qe_get_num_of_risc(void)
>   	unsigned int num_of_risc = 0;
>   	const u32 *prop;
>   
> -	qe = of_find_compatible_node(NULL, NULL, "fsl,qe");
> -	if (!qe) {
> -		/* Older devices trees did not have an "fsl,qe"
> -		 * compatible property, so we need to look for
> -		 * the QE node by name.
> -		 */
> -		qe = of_find_node_by_type(NULL, "qe");
> -		if (!qe)
> -			return num_of_risc;
> -	}
> +	qe = qe_get_device_node();
> +	if (!qe)
> +		return num_of_risc;
>   
>   	prop = of_get_property(qe, "fsl,qe-num-riscs", &size);
>   	if (prop && size == sizeof(*prop))
> @@ -647,16 +641,9 @@ unsigned int qe_get_num_of_snums(void)
>   	const u32 *prop;
>   
>   	num_of_snums = 28; /* The default number of snum for threads is 28 */
> -	qe = of_find_compatible_node(NULL, NULL, "fsl,qe");
> -	if (!qe) {
> -		/* Older devices trees did not have an "fsl,qe"
> -		 * compatible property, so we need to look for
> -		 * the QE node by name.
> -		 */
> -		qe = of_find_node_by_type(NULL, "qe");
> -		if (!qe)
> -			return num_of_snums;
> -	}
> +	qe = qe_get_device_node();
> +	if (!qe)
> +		return num_of_snums;
>   
>   	prop = of_get_property(qe, "fsl,qe-num-snums", &size);
>   	if (prop && size == sizeof(*prop)) {
>