linux-kernel - Re: [PATCH 5/8] remoteproc: qcom: Add efuse evb selection control

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Message-ID: <dd446961-c455-d721-cc0a-2aec506b2189@quicinc.com>
Date:   Tue, 9 Aug 2022 12:01:56 +0530
From:   Srinivasa Rao Mandadapu <quic_srivasam@...cinc.com>
To:     Dmitry Baryshkov <dmitry.baryshkov@...aro.org>,
        <linux-remoteproc@...r.kernel.org>, <agross@...nel.org>,
        <bjorn.andersson@...aro.org>, <lgirdwood@...il.com>,
        <broonie@...nel.org>, <robh+dt@...nel.org>,
        <quic_plai@...cinc.com>, <bgoswami@...cinc.com>, <perex@...ex.cz>,
        <tiwai@...e.com>, <srinivas.kandagatla@...aro.org>,
        <quic_rohkumar@...cinc.com>, <linux-arm-msm@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>, <swboyd@...omium.org>,
        <judyhsiao@...omium.org>, <devicetree@...r.kernel.org>
Subject: Re: [PATCH 5/8] remoteproc: qcom: Add efuse evb selection control


On 8/7/2022 1:56 AM, Dmitry Baryshkov wrote:
Thanks for Your Time Dmitry!!!
> On 03/08/2022 17:21, Srinivasa Rao Mandadapu wrote:
>> Add efuse evb selection control and enable it for starting ADSP.
>>
>> Signed-off-by: Srinivasa Rao Mandadapu <quic_srivasam@...cinc.com>
>
> Is the lpass_efuse region used solely by the ADSP or is it shared with 
> anybody else (e.g. other sound-related devices)? If the latter is 
> true, then please use syscon for the lpass_efuse region.
This region is being used by ADS PIL driver only.
>
>> ---
>>   drivers/remoteproc/qcom_q6v5_adsp.c | 10 ++++++++++
>>   1 file changed, 10 insertions(+)
>>
>> diff --git a/drivers/remoteproc/qcom_q6v5_adsp.c 
>> b/drivers/remoteproc/qcom_q6v5_adsp.c
>> index a9fcb5c..201cc21 100644
>> --- a/drivers/remoteproc/qcom_q6v5_adsp.c
>> +++ b/drivers/remoteproc/qcom_q6v5_adsp.c
>> @@ -56,6 +56,7 @@
>>     #define LPASS_BOOT_CORE_START    BIT(0)
>>   #define LPASS_BOOT_CMD_START    BIT(0)
>> +#define LPASS_EFUSE_Q6SS_EVB_SEL 0x0
>>     struct adsp_pil_data {
>>       int crash_reason_smem;
>> @@ -85,6 +86,7 @@ struct qcom_adsp {
>>       struct clk_bulk_data *clks;
>>         void __iomem *qdsp6ss_base;
>> +    void __iomem *lpass_efuse;
>>         struct reset_control *pdc_sync_reset;
>>       struct reset_control *restart;
>> @@ -366,6 +368,9 @@ static int adsp_start(struct rproc *rproc)
>>       /* Program boot address */
>>       writel(adsp->mem_phys >> 4, adsp->qdsp6ss_base + RST_EVB_REG);
>>   +    if (adsp->lpass_efuse)
>> +        writel(LPASS_EFUSE_Q6SS_EVB_SEL, adsp->lpass_efuse);
>> +
>>       /* De-assert QDSP6 stop core. QDSP6 will execute after out of 
>> reset */
>>       writel(LPASS_BOOT_CORE_START, adsp->qdsp6ss_base + 
>> CORE_START_REG);
>>   @@ -520,6 +525,11 @@ static int adsp_init_mmio(struct qcom_adsp *adsp,
>>           return PTR_ERR(adsp->qdsp6ss_base);
>>       }
>>   +    adsp->lpass_efuse = 
>> devm_platform_ioremap_resource_byname(pdev, "lpass_efuse");
>> +    if (IS_ERR(adsp->lpass_efuse)) {
>> +        adsp->lpass_efuse = NULL;
>> +        dev_dbg(adsp->dev, "failed to map LPASS efuse registers\n");
>> +    }
>>       syscon = of_parse_phandle(pdev->dev.of_node, "qcom,halt-regs", 0);
>>       if (!syscon) {
>>           dev_err(&pdev->dev, "failed to parse qcom,halt-regs\n");
>
>