Commit 17051d2c authored by Robert Marko's avatar Robert Marko Committed by Bjorn Andersson
Browse files

soc: qcom: smem: introduce qcom_smem_get_soc_id() 



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: default avatarRobert Marko <robimarko@gmail.com>
Reviewed-by: default avatarKonrad Dybcio <konrad.dybcio@linaro.org>
Signed-off-by: default avatarBjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20230526204802.3081168-3-robimarko@gmail.com
parent 10615007

drivers/soc/qcom/smem.c

+23 −0
Original line number Diff line number Diff line
@@ -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 +773,28 @@ phys_addr_t qcom_smem_virt_to_phys(void *p) 
}

EXPORT_SYMBOL_GPL(qcom_smem_virt_to_phys);



/**

 * qcom_smem_get_soc_id() - return the SoC ID

 * @id:	On success, we return the SoC ID here.

 *

 * Look up SoC ID from HW/SW build ID and return it.

 *

 * Return: 0 on success, negative errno on failure.

 */

int qcom_smem_get_soc_id(u32 *id)

{

	struct socinfo *info;



	info = qcom_smem_get(QCOM_SMEM_HOST_ANY, SMEM_HW_SW_BUILD_ID, NULL);

	if (IS_ERR(info))

		return PTR_ERR(info);



	*id = __le32_to_cpu(info->id);



	return 0;

}

EXPORT_SYMBOL_GPL(qcom_smem_get_soc_id);



static int qcom_smem_get_sbl_version(struct qcom_smem *smem)

{

	struct smem_header *header;

include/linux/soc/qcom/smem.h

+2 −0
Original line number Diff line number Diff line
@@ -11,4 +11,6 @@ int qcom_smem_get_free_space(unsigned host); 


phys_addr_t qcom_smem_virt_to_phys(void *p);



int qcom_smem_get_soc_id(u32 *id);



#endif