target/linux/generic/backport-6.1/830-03-v6.5-soc-qcom-smem-introduce-qcom_smem_get_soc_id.patch

   1 From c3ecf2602a32d9b9e5fc997076c0d2836495c085 Mon Sep 17 00:00:00 2001
   2 From: Robert Marko <robimarko@gmail.com>
   3 Date: Fri, 26 May 2023 22:48:00 +0200
   4 Subject: [PATCH] soc: qcom: smem: introduce qcom_smem_get_soc_id()
   5
   6 Introduce a helper to return the SoC SMEM ID, which is used to identify the
   7 exact SoC model as there may be differences in the same SoC family.
   8
   9 Currently, cpufreq-nvmem does this completely in the driver and there has
  10 been more interest expresed for other drivers to use this information so
  11 lets expose a common helper to prevent redoing it in individual drivers
  12 since this field is present on every SMEM table version.
  13
  14 Signed-off-by: Robert Marko <robimarko@gmail.com>
  15 Reviewed-by: Konrad Dybcio <konrad.dybcio@linaro.org>
  16 Signed-off-by: Bjorn Andersson <andersson@kernel.org>
  17 Link: https://lore.kernel.org/r/20230526204802.3081168-3-robimarko@gmail.com
  18 ---
  19  drivers/soc/qcom/smem.c       | 23 +++++++++++++++++++++++
  20  include/linux/soc/qcom/smem.h |  2 ++
  21  2 files changed, 25 insertions(+)
  22
  23 --- a/drivers/soc/qcom/smem.c
  24 +++ b/drivers/soc/qcom/smem.c
  25 @@ -14,6 +14,7 @@
  26  #include <linux/sizes.h>
  27  #include <linux/slab.h>
  28  #include <linux/soc/qcom/smem.h>
  29 +#include <linux/soc/qcom/socinfo.h>
  30
  31  /*
  32   * The Qualcomm shared memory system is a allocate only heap structure that
  33 @@ -772,6 +773,28 @@ phys_addr_t qcom_smem_virt_to_phys(void
  34  }
  35  EXPORT_SYMBOL_GPL(qcom_smem_virt_to_phys);
  36
  37 +/**
  38 + * qcom_smem_get_soc_id() - return the SoC ID
  39 + * @id:        On success, we return the SoC ID here.
  40 + *
  41 + * Look up SoC ID from HW/SW build ID and return it.
  42 + *
  43 + * Return: 0 on success, negative errno on failure.
  44 + */
  45 +int qcom_smem_get_soc_id(u32 *id)
  46 +{
  47 +       struct socinfo *info;
  48 +
  49 +       info = qcom_smem_get(QCOM_SMEM_HOST_ANY, SMEM_HW_SW_BUILD_ID, NULL);
  50 +       if (IS_ERR(info))
  51 +               return PTR_ERR(info);
  52 +
  53 +       *id = __le32_to_cpu(info->id);
  54 +
  55 +       return 0;
  56 +}
  57 +EXPORT_SYMBOL_GPL(qcom_smem_get_soc_id);
  58 +
  59  static int qcom_smem_get_sbl_version(struct qcom_smem *smem)
  60  {
  61         struct smem_header *header;
  62 --- a/include/linux/soc/qcom/smem.h
  63 +++ b/include/linux/soc/qcom/smem.h
  64 @@ -11,4 +11,6 @@ int qcom_smem_get_free_space(unsigned ho
  65
  66  phys_addr_t qcom_smem_virt_to_phys(void *p);
  67
  68 +int qcom_smem_get_soc_id(u32 *id);
  69 +
  70  #endif