linux-kernel - Re: [PATCH v7 5/5] remoteproc: pru: Configure firmware based on client setup

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Message-ID: <0f9dbaa5-10b8-1126-6df9-e87e81d3abac@kernel.org>
Date:   Fri, 4 Nov 2022 15:02:59 +0200
From:   Roger Quadros <rogerq@...nel.org>
To:     MD Danish Anwar <danishanwar@...com>,
        Mathieu Poirier <mathieu.poirier@...aro.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Rob Herring <robh+dt@...nel.org>
Cc:     Suman Anna <s-anna@...com>, "Andrew F . Davis" <afd@...com>,
        nm@...com, vigneshr@...com, srk@...com,
        linux-remoteproc@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH v7 5/5] remoteproc: pru: Configure firmware based on
 client setup



On 31/10/2022 09:38, MD Danish Anwar wrote:
> From: Tero Kristo <t-kristo@...com>
> 
> Client device node property firmware-name is now used to configure
> firmware for the PRU instances. The default firmware is also
> restored once releasing the PRU resource.
> 
> Co-developed-by: Suman Anna <s-anna@...com>
> Signed-off-by: Suman Anna <s-anna@...com>
> Signed-off-by: Tero Kristo <t-kristo@...com>
> Co-developed-by: Grzegorz Jaszczyk <grzegorz.jaszczyk@...aro.org>
> Signed-off-by: Grzegorz Jaszczyk <grzegorz.jaszczyk@...aro.org>
> Signed-off-by: Puranjay Mohan <p-mohan@...com>
> Signed-off-by: MD Danish Anwar <danishanwar@...com>
> ---
>  drivers/remoteproc/pru_rproc.c | 34 ++++++++++++++++++++++++++++++++++
>  1 file changed, 34 insertions(+)
> 
> diff --git a/drivers/remoteproc/pru_rproc.c b/drivers/remoteproc/pru_rproc.c
> index 3d1870e6b13b..15ffaeddd963 100644
> --- a/drivers/remoteproc/pru_rproc.c
> +++ b/drivers/remoteproc/pru_rproc.c
> @@ -172,6 +172,23 @@ void pru_control_set_reg(struct pru_rproc *pru, unsigned int reg,
>  	spin_unlock_irqrestore(&pru->rmw_lock, flags);
>  }
>  
> +/**
> + * pru_rproc_set_firmware() - set firmware for a pru core

s/pru/PRU

> + * @rproc: the rproc instance of the PRU
> + * @fw_name: the new firmware name, or NULL if default is desired
> + *
> + * Return: 0 on success, or errno in error case.
> + */
> +static int pru_rproc_set_firmware(struct rproc *rproc, const char *fw_name)
> +{
> +	struct pru_rproc *pru = rproc->priv;
> +
> +	if (!fw_name)
> +		fw_name = pru->fw_name;
> +
> +	return rproc_set_firmware(rproc, fw_name);
> +}
> +
>  static struct rproc *__pru_rproc_get(struct device_node *np, int index)
>  {
>  	struct rproc *rproc;
> @@ -230,6 +247,7 @@ struct rproc *pru_rproc_get(struct device_node *np, int index,
>  	struct rproc *rproc;
>  	struct pru_rproc *pru;
>  	struct device *dev;
> +	const char *fw_name;
>  	int ret;
>  
>  	rproc = __pru_rproc_get(np, index);
> @@ -256,11 +274,25 @@ struct rproc *pru_rproc_get(struct device_node *np, int index,
>  	if (pru_id)
>  		*pru_id = pru->id;
>  
> +	ret = of_property_read_string_index(np, "firmware-name", index,
> +					    &fw_name);
> +	if (!ret) {
> +		ret = pru_rproc_set_firmware(rproc, fw_name);
> +		if (ret) {
> +			dev_err(dev, "failed to set firmware: %d\n", ret);
> +			goto err;
> +		}
> +	}
> +
>  	return rproc;
>  
>  err_no_rproc_handle:
>  	rproc_put(rproc);
>  	return ERR_PTR(ret);
> +
> +err:
> +	pru_rproc_put(rproc);
> +	return ERR_PTR(ret);
>  }
>  EXPORT_SYMBOL_GPL(pru_rproc_get);
>  
> @@ -280,6 +312,8 @@ void pru_rproc_put(struct rproc *rproc)
>  
>  	pru = rproc->priv;
>  
> +	pru_rproc_set_firmware(rproc, NULL);
> +
>  	mutex_lock(&pru->lock);
>  
>  	if (!pru->client_np) {

Reviewed-by: Roger Quadros <rogerq@...nel.org>

--
cheers,
-roger