71 lines
2.2 KiB
Diff
71 lines
2.2 KiB
Diff
From c3ecf2602a32d9b9e5fc997076c0d2836495c085 Mon Sep 17 00:00:00 2001
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From: Robert Marko <robimarko@gmail.com>
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Date: Fri, 26 May 2023 22:48:00 +0200
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Subject: [PATCH] soc: qcom: smem: introduce qcom_smem_get_soc_id()
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Introduce a helper to return the SoC SMEM ID, which is used to identify the
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exact SoC model as there may be differences in the same SoC family.
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Currently, cpufreq-nvmem does this completely in the driver and there has
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been more interest expresed for other drivers to use this information so
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lets expose a common helper to prevent redoing it in individual drivers
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since this field is present on every SMEM table version.
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Signed-off-by: Robert Marko <robimarko@gmail.com>
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Reviewed-by: Konrad Dybcio <konrad.dybcio@linaro.org>
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Signed-off-by: Bjorn Andersson <andersson@kernel.org>
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Link: https://lore.kernel.org/r/20230526204802.3081168-3-robimarko@gmail.com
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---
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drivers/soc/qcom/smem.c | 23 +++++++++++++++++++++++
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include/linux/soc/qcom/smem.h | 2 ++
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2 files changed, 25 insertions(+)
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--- a/drivers/soc/qcom/smem.c
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+++ b/drivers/soc/qcom/smem.c
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@@ -14,6 +14,7 @@
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#include <linux/sizes.h>
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#include <linux/slab.h>
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#include <linux/soc/qcom/smem.h>
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+#include <linux/soc/qcom/socinfo.h>
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/*
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* The Qualcomm shared memory system is a allocate only heap structure that
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@@ -772,6 +773,28 @@ phys_addr_t qcom_smem_virt_to_phys(void
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}
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EXPORT_SYMBOL_GPL(qcom_smem_virt_to_phys);
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+/**
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+ * qcom_smem_get_soc_id() - return the SoC ID
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+ * @id: On success, we return the SoC ID here.
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+ *
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+ * Look up SoC ID from HW/SW build ID and return it.
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+ *
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+ * Return: 0 on success, negative errno on failure.
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+ */
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+int qcom_smem_get_soc_id(u32 *id)
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+{
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+ struct socinfo *info;
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+
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+ info = qcom_smem_get(QCOM_SMEM_HOST_ANY, SMEM_HW_SW_BUILD_ID, NULL);
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+ if (IS_ERR(info))
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+ return PTR_ERR(info);
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+
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+ *id = __le32_to_cpu(info->id);
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+
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+ return 0;
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+}
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+EXPORT_SYMBOL_GPL(qcom_smem_get_soc_id);
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+
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static int qcom_smem_get_sbl_version(struct qcom_smem *smem)
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{
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struct smem_header *header;
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--- a/include/linux/soc/qcom/smem.h
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+++ b/include/linux/soc/qcom/smem.h
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@@ -11,4 +11,6 @@ int qcom_smem_get_free_space(unsigned ho
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phys_addr_t qcom_smem_virt_to_phys(void *p);
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+int qcom_smem_get_soc_id(u32 *id);
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+
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#endif
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