From f0e1b8b149332cefc429369da181a26069cc6bbb Mon Sep 17 00:00:00 2001
From: Sean Rhodes <sean@starlabs.systems>
Date: Mon, 30 Sep 2024 11:10:00 +0100
Subject: soc/intel/common/cnvi: Add CNMT Mutex

Add "CNMT" Mutex, that will be used by the Bluetooth and CNVi
driver.

Change-Id: I607865458f925d6f4aa713e07cfa34e83b2e5c8f
Signed-off-by: Sean Rhodes <sean@starlabs.systems>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/84598
Reviewed-by: Matt DeVillier <matt.devillier@gmail.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
---
 src/soc/intel/common/block/cnvi/cnvi.c | 19 ++++++++++++++++++-
 1 file changed, 18 insertions(+), 1 deletion(-)

(limited to 'src/soc/intel/common/block/cnvi')

diff --git a/src/soc/intel/common/block/cnvi/cnvi.c b/src/soc/intel/common/block/cnvi/cnvi.c
index 08a6d683c5..e8613101ef 100644
--- a/src/soc/intel/common/block/cnvi/cnvi.c
+++ b/src/soc/intel/common/block/cnvi/cnvi.c
@@ -1,6 +1,8 @@
 /* SPDX-License-Identifier: GPL-2.0-only */
 
+#include <acpi/acpi.h>
 #include <acpi/acpi_device.h>
+#include <acpi/acpigen.h>
 #include <device/device.h>
 #include <device/pci.h>
 #include <device/pci_ids.h>
@@ -10,6 +12,21 @@ static const char *cnvi_wifi_acpi_name(const struct device *dev)
 	return "CNVW";
 }
 
+static void cnvw_fill_ssdt(const struct device *dev)
+{
+	const char *scope = acpi_device_path(dev);
+
+	acpi_device_write_pci_dev(dev);
+
+	acpigen_write_scope(scope);
+/*
+ *	Mutex (CNMT, 0)
+ */
+	acpigen_write_mutex("CNMT", 0);
+
+	acpigen_write_scope_end();
+}
+
 static struct device_operations cnvi_wifi_ops = {
 	.read_resources		= pci_dev_read_resources,
 	.set_resources		= pci_dev_set_resources,
@@ -17,7 +34,7 @@ static struct device_operations cnvi_wifi_ops = {
 	.ops_pci		= &pci_dev_ops_pci,
 	.scan_bus		= scan_static_bus,
 	.acpi_name		= cnvi_wifi_acpi_name,
-	.acpi_fill_ssdt		= acpi_device_write_pci_dev,
+	.acpi_fill_ssdt		= cnvw_fill_ssdt,
 };
 
 static const unsigned short wifi_pci_device_ids[] = {
-- 
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