linux-kernel - Re: [PATCH v2 3/4] soundwire: qcom: add support for mmio soundwire master devices

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Date:   Tue, 8 Sep 2020 09:57:43 -0400
From:   Jonathan Marek <jonathan@...ek.ca>
To:     Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>,
        linux-arm-msm@...r.kernel.org
Cc:     "moderated list:SOUNDWIRE SUBSYSTEM" <alsa-devel@...a-project.org>,
        open list <linux-kernel@...r.kernel.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Vinod Koul <vkoul@...nel.org>, Andy Gross <agross@...nel.org>,
        Sanyog Kale <sanyog.r.kale@...el.com>,
        Bard Liao <yung-chuan.liao@...ux.intel.com>
Subject: Re: [PATCH v2 3/4] soundwire: qcom: add support for mmio soundwire
 master devices



On 9/8/20 9:56 AM, Pierre-Louis Bossart wrote:
> 
> 
> 
>> @@ -764,8 +786,11 @@ static int qcom_swrm_probe(struct platform_device 
>> *pdev)
>>           if (!ctrl->regmap)
>>               return -EINVAL;
>>       } else {
>> -        /* Only WCD based SoundWire controller is supported */
>> -        return -ENOTSUPP;
>> +        ctrl->reg_read = qcom_swrm_cpu_reg_read;
>> +        ctrl->reg_write = qcom_swrm_cpu_reg_write;
>> +        ctrl->mmio = devm_platform_ioremap_resource(pdev, 0);
>> +        if (IS_ERR(ctrl->mmio))
>> +            return PTR_ERR(ctrl->mmio);
> 
> Shouldn't this be conditional on SLIMBUS being enabled, as done in your 
> patch2?
> 

No, the case above is the SLIMBUS case. This patch is adding support for 
the non-SLIMBUS case.

>>       }
>>       ctrl->irq = of_irq_get(dev->of_node, 0);
>>