netdev - Re: [PATCH 4/5] soc: qcom: wcnss_ctrl: Allow reading firmware-name from DT

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Message-ID: <e3421bd4-e4ce-95fc-0598-b73353469d0d@linaro.org>
Date:   Mon, 15 Mar 2021 11:57:42 +0000
From:   Bryan O'Donoghue <bryan.odonoghue@...aro.org>
To:     Bjorn Andersson <bjorn.andersson@...aro.org>,
        Andy Gross <agross@...nel.org>,
        Rob Herring <robh+dt@...nel.org>
Cc:     Kalle Valo <kvalo@...eaurora.org>,
        "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, wcn36xx@...ts.infradead.org,
        linux-wireless@...r.kernel.org, netdev@...r.kernel.org
Subject: Re: [PATCH 4/5] soc: qcom: wcnss_ctrl: Allow reading firmware-name
 from DT

On 12/03/2021 00:33, Bjorn Andersson wrote:
> The WLAN NV firmware blob differs between platforms, and possibly
> devices, so add support in the wcnss_ctrl driver for reading the path of
> this file from DT in order to allow these files to live in a generic
> file system (or linux-firmware).
> 
> The new property is optional and the code falls back to the old filename
> if the property isn't specified.
> 
> Signed-off-by: Bjorn Andersson <bjorn.andersson@...aro.org>
> ---
>   drivers/soc/qcom/wcnss_ctrl.c | 10 +++++++---
>   1 file changed, 7 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/soc/qcom/wcnss_ctrl.c b/drivers/soc/qcom/wcnss_ctrl.c
> index 358526b9de06..2a06d631e415 100644
> --- a/drivers/soc/qcom/wcnss_ctrl.c
> +++ b/drivers/soc/qcom/wcnss_ctrl.c
> @@ -200,6 +200,7 @@ static int wcnss_download_nv(struct wcnss_ctrl *wcnss, bool *expect_cbc)
>   	struct wcnss_download_nv_req *req;
>   	const struct firmware *fw;
>   	struct device *dev = wcnss->dev;
> +	const char *nvbin = NVBIN_FILE;
>   	const void *data;
>   	ssize_t left;
>   	int ret;
> @@ -208,10 +209,13 @@ static int wcnss_download_nv(struct wcnss_ctrl *wcnss, bool *expect_cbc)
>   	if (!req)
>   		return -ENOMEM;
>   
> -	ret = request_firmware(&fw, NVBIN_FILE, dev);
> +	ret = of_property_read_string(dev->of_node, "firmware-name", &nvbin);
> +	if (ret < 0 && ret != -EINVAL)
> +		goto free_req;
> +
> +	ret = request_firmware(&fw, nvbin, dev);
>   	if (ret < 0) {
> -		dev_err(dev, "Failed to load nv file %s: %d\n",
> -			NVBIN_FILE, ret);
> +		dev_err(dev, "Failed to load nv file %s: %d\n", nvbin, ret);
>   		goto free_req;
>   	}
>   
> 

Tested-by: Bryan O'Donoghue <bryan.odonoghue@...aro.org>