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mailbox/riscv-sbi-mpxy: Add ACPI support 

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

Acked-by: Jassi Brar <jassisinghbrar@gmail.com>
Signed-off-by: Sunil V L <sunilvl@ventanamicro.com>
Signed-off-by: Anup Patel <apatel@ventanamicro.com>
Link: https://lore.kernel.org/r/20250818040920.272664-22-apatel@ventanamicro.com
Signed-off-by: Paul Walmsley <pjw@kernel.org>
This commit is contained in:
Sunil V L 2025-08-18 09:39:17 +05:30 committed by Paul Walmsley
parent 3f5d7a5c05
commit 7e64042fdb
1 changed files with 26 additions and 1 deletions
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27
drivers/mailbox/riscv-sbi-mpxy-mbox.c
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@ -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,