linux-kernel - Re: [PATCH v2 2/4] soc: qcom: smem: introduce qcom_smem_get_msm

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Date:   Wed, 24 May 2023 11:16:39 -0700
From:   Trilok Soni <quic_tsoni@...cinc.com>
To:     Robert Marko <robimarko@...il.com>, <agross@...nel.org>,
        <andersson@...nel.org>, <konrad.dybcio@...aro.org>,
        <ilia.lin@...nel.org>, <rafael@...nel.org>,
        <viresh.kumar@...aro.org>, <linux-kernel@...r.kernel.org>,
        <linux-arm-msm@...r.kernel.org>, <linux-pm@...r.kernel.org>
CC:     <ansuelsmth@...il.com>
Subject: Re: [PATCH v2 2/4] soc: qcom: smem: introduce qcom_smem_get_msm_id()

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@...il.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)
> +{
> +	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