linux-kernel - Re: [PATCH 13/26] net: stmmac: dwmac-qcom-ethqos: make the rgmii clock optional

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20230612204042.litbbv23zdb3u5k7@halaney-x13s>
Date:   Mon, 12 Jun 2023 15:40:42 -0500
From:   Andrew Halaney <ahalaney@...hat.com>
To:     Bartosz Golaszewski <brgl@...ev.pl>
Cc:     Vinod Koul <vkoul@...nel.org>,
        Bhupesh Sharma <bhupesh.sharma@...aro.org>,
        Andy Gross <agross@...nel.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Konrad Dybcio <konrad.dybcio@...aro.org>,
        "David S . Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Kishon Vijay Abraham I <kishon@...nel.org>,
        Giuseppe Cavallaro <peppe.cavallaro@...com>,
        Alexandre Torgue <alexandre.torgue@...s.st.com>,
        Jose Abreu <joabreu@...opsys.com>, netdev@...r.kernel.org,
        linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-phy@...ts.infradead.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-stm32@...md-mailman.stormreply.com,
        Bartosz Golaszewski <bartosz.golaszewski@...aro.org>
Subject: Re: [PATCH 13/26] net: stmmac: dwmac-qcom-ethqos: make the rgmii
 clock optional

On Mon, Jun 12, 2023 at 11:23:42AM +0200, Bartosz Golaszewski wrote:
> From: Bartosz Golaszewski <bartosz.golaszewski@...aro.org>
> 
> On sa8775p there's no RGMII clock so make it optional in the driver.
> 
> Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@...aro.org>
> ---
>  drivers/net/ethernet/stmicro/stmmac/dwmac-qcom-ethqos.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-qcom-ethqos.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-qcom-ethqos.c
> index 3438b6229351..252dca400071 100644
> --- a/drivers/net/ethernet/stmicro/stmmac/dwmac-qcom-ethqos.c
> +++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-qcom-ethqos.c
> @@ -663,7 +663,7 @@ static int qcom_ethqos_probe(struct platform_device *pdev)
>  	ethqos->rgmii_config_loopback_en = data->rgmii_config_loopback_en;
>  	ethqos->has_emac3 = data->has_emac3;
>  
> -	ethqos->rgmii_clk = devm_clk_get(dev, "rgmii");
> +	ethqos->rgmii_clk = devm_clk_get_optional(dev, "rgmii");

This makes it optional for older platforms too, but as far as I know on
those platforms it is mandatory.

This can be enforced in dt-binding checks, but should we also enforce
that in the driver still? Honestly I feel like yes, but there's probably
some precedent maintainers follow on this front that I don't know of.


>  	if (IS_ERR(ethqos->rgmii_clk)) {
>  		ret = PTR_ERR(ethqos->rgmii_clk);
>  		goto out_config_dt;
> -- 
> 2.39.2
>