Commit a51627c5 authored by Shawn Guo's avatar Shawn Guo Committed by Will Deacon
Browse files

iommu/arm-smmu-qcom: hook up qcom_smmu_impl for ACPI boot 



The hookup with qcom_smmu_impl is required to do ACPI boot on SC8180X
based devices like Lenovo Flex 5G laptop and Microsoft Surface Pro X.
Define acpi_platform_list for these platforms and match them using
acpi_match_platform_list() call, and create qcom_smmu_impl accordingly.

(np == NULL) is used to check ACPI boot, because fwnode of SMMU device
is a static allocation and thus helpers like has_acpi_companion() don't
work here.

Signed-off-by: default avatarShawn Guo <shawn.guo@linaro.org>
Reviewed-by: default avatarRobin Murphy <robin.murphy@arm.com>
Reviewed-by: default avatarBjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/20210509022607.17534-1-shawn.guo@linaro.org


Signed-off-by: default avatarWill Deacon <will@kernel.org>
parent c4681547

drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c

+13 −0
Original line number Diff line number Diff line
@@ -3,6 +3,7 @@ 
 * Copyright (c) 2019, The Linux Foundation. All rights reserved.

 */



#include <linux/acpi.h>

#include <linux/adreno-smmu-priv.h>

#include <linux/of_device.h>

#include <linux/qcom_scm.h>
@@ -339,10 +340,22 @@ static const struct of_device_id __maybe_unused qcom_smmu_impl_of_match[] = { 
	{ }

};



static struct acpi_platform_list qcom_acpi_platlist[] = {

	{ "LENOVO", "CB-01   ", 0x8180, ACPI_SIG_IORT, equal, "QCOM SMMU" },

	{ "QCOM  ", "QCOMEDK2", 0x8180, ACPI_SIG_IORT, equal, "QCOM SMMU" },

	{ }

};



struct arm_smmu_device *qcom_smmu_impl_init(struct arm_smmu_device *smmu)

{

	const struct device_node *np = smmu->dev->of_node;



	if (np == NULL) {

		/* Match platform for ACPI boot */

		if (acpi_match_platform_list(qcom_acpi_platlist) >= 0)

			return qcom_smmu_create(smmu, &qcom_smmu_impl);

	}



	if (of_match_node(qcom_smmu_impl_of_match, np))

		return qcom_smmu_create(smmu, &qcom_smmu_impl);