Commit 7e64042f authored by Sunil V L's avatar Sunil V L Committed by Paul Walmsley
Browse files

mailbox/riscv-sbi-mpxy: Add ACPI support 



Add ACPI support for the RISC-V SBI message proxy (MPXY) based
mailbox driver.

Acked-by: default avatarJassi Brar <jassisinghbrar@gmail.com>
Signed-off-by: default avatarSunil V L <sunilvl@ventanamicro.com>
Signed-off-by: default avatarAnup Patel <apatel@ventanamicro.com>
Link: https://lore.kernel.org/r/20250818040920.272664-22-apatel@ventanamicro.com


Signed-off-by: default avatarPaul Walmsley <pjw@kernel.org>
parent 3f5d7a5c

drivers/mailbox/riscv-sbi-mpxy-mbox.c

+26 −1
Original line number Diff line number Diff line
@@ -5,9 +5,11 @@ 
 * Copyright (C) 2025 Ventana Micro Systems Inc.

 */



#include <linux/acpi.h>

#include <linux/cpu.h>

#include <linux/errno.h>

#include <linux/init.h>

#include <linux/irqchip/riscv-imsic.h>

#include <linux/mailbox_controller.h>

#include <linux/mailbox/riscv-rpmi-message.h>

#include <linux/minmax.h>
@@ -906,6 +908,8 @@ static int mpxy_mbox_probe(struct platform_device *pdev) 
		 * explicitly configure here.

		 */

		if (!dev_get_msi_domain(dev)) {

			struct fwnode_handle *fwnode = dev_fwnode(dev);



			/*

			 * The device MSI domain for OF devices is only set at the

			 * time of populating/creating OF device. If the device MSI
@@ -913,8 +917,15 @@ static int mpxy_mbox_probe(struct platform_device *pdev) 
			 * then we need to set it explicitly before using any platform

			 * MSI functions.

			 */

			if (dev_of_node(dev))

			if (is_of_node(fwnode)) {

				of_msi_configure(dev, dev_of_node(dev));

			} else if (is_acpi_device_node(fwnode)) {

				struct irq_domain *msi_domain;



				msi_domain = irq_find_matching_fwnode(imsic_acpi_get_fwnode(dev),

								      DOMAIN_BUS_PLATFORM_MSI);

				dev_set_msi_domain(dev, msi_domain);

			}



			if (!dev_get_msi_domain(dev))

				return -EPROBE_DEFER;
@@ -960,6 +971,13 @@ static int mpxy_mbox_probe(struct platform_device *pdev) 
		return rc;

	}



#ifdef CONFIG_ACPI

	struct acpi_device *adev = ACPI_COMPANION(dev);



	if (adev)

		acpi_dev_clear_dependencies(adev);

#endif



	dev_info(dev, "mailbox registered with %d channels\n",

		 mbox->channel_count);

	return 0;
@@ -979,10 +997,17 @@ static const struct of_device_id mpxy_mbox_of_match[] = { 
};

MODULE_DEVICE_TABLE(of, mpxy_mbox_of_match);



static const struct acpi_device_id mpxy_mbox_acpi_match[] = {

	{ "RSCV0005" },

	{}

};

MODULE_DEVICE_TABLE(acpi, mpxy_mbox_acpi_match);



static struct platform_driver mpxy_mbox_driver = {

	.driver = {

		.name = "riscv-sbi-mpxy-mbox",

		.of_match_table = mpxy_mbox_of_match,

		.acpi_match_table = mpxy_mbox_acpi_match,

	},

	.probe = mpxy_mbox_probe,

	.remove = mpxy_mbox_remove,