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Message-ID: <d9406953-6452-2394-ab3f-4ce1d8986fce@linaro.org>
Date:   Wed, 24 May 2023 20:27:03 +0200
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Subject: Re: [PATCH v2 2/4] soc: qcom: smem: introduce qcom_smem_get_msm_id()
To:     Trilok Soni <quic_tsoni@quicinc.com>,
        Robert Marko <robimarko@gmail.com>, agross@kernel.org,
        andersson@kernel.org, ilia.lin@kernel.org, rafael@kernel.org,
        viresh.kumar@linaro.org, linux-kernel@vger.kernel.org,
        linux-arm-msm@vger.kernel.org, linux-pm@vger.kernel.org
Cc:     ansuelsmth@gmail.com
References: <20230524162329.819770-1-robimarko@gmail.com>
 <20230524162329.819770-2-robimarko@gmail.com>
 <47c0faf0-f855-d3c4-6825-e51a1a1a7c83@quicinc.com>
Content-Language: en-US
From:   Konrad Dybcio <konrad.dybcio@linaro.org>
In-Reply-To: <47c0faf0-f855-d3c4-6825-e51a1a1a7c83@quicinc.com>
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On 24.05.2023 20:16, Trilok Soni wrote:
> On 5/24/2023 9:23 AM, Robert Marko wrote:
>> Introduce a helper to return the SoC SMEM ID, which is used to identify the
>> exact SoC model as there may be differences in the same SoC family.
>>
>> Currently, cpufreq-nvmem does this completely in the driver and there has
>> been more interest expresed for other drivers to use this information so
>> lets expose a common helper to prevent redoing it in individual drivers
>> since this field is present on every SMEM table version.
>>
>> Signed-off-by: Robert Marko <robimarko@gmail.com>
>> ---
>>   drivers/soc/qcom/smem.c       | 19 +++++++++++++++++++
>>   include/linux/soc/qcom/smem.h |  2 ++
>>   2 files changed, 21 insertions(+)
>>
>> diff --git a/drivers/soc/qcom/smem.c b/drivers/soc/qcom/smem.c
>> index 6be7ea93c78c..0d6ba9bce8cb 100644
>> --- a/drivers/soc/qcom/smem.c
>> +++ b/drivers/soc/qcom/smem.c
>> @@ -14,6 +14,7 @@
>>   #include <linux/sizes.h>
>>   #include <linux/slab.h>
>>   #include <linux/soc/qcom/smem.h>
>> +#include <linux/soc/qcom/socinfo.h>
>>     /*
>>    * The Qualcomm shared memory system is a allocate only heap structure that
>> @@ -772,6 +773,24 @@ phys_addr_t qcom_smem_virt_to_phys(void *p)
>>   }
>>   EXPORT_SYMBOL(qcom_smem_virt_to_phys);
>>   +/**
>> + * qcom_smem_get_msm_id() - return the SoC ID
>> + *
>> + * Look up SoC ID from HW/SW build ID and return it.
>> + */
>> +int qcom_smem_get_msm_id(void)
On top of Trilok's point, this should return le32, or at least unsigned int.

Konrad
>> +{
>> +    size_t len;
>> +    struct socinfo *info;
>> +
>> +    info = qcom_smem_get(QCOM_SMEM_HOST_ANY, SMEM_HW_SW_BUILD_ID, &len);
>> +    if (IS_ERR(info))
>> +        return PTR_ERR(info);
>> +
>> +    return __le32_to_cpu(info->id);
>> +}
>> +EXPORT_SYMBOL(qcom_smem_get_msm_id);
> 
> EXPORT_SYMBOL_GPL please?
> 
> Please change it for other symbols in the driver as well w/ separate patch.
> 
> ---Trilok Soni
> 
>