linux-kernel - [PATCH 3/3] firmware: arm_ffa: Provide .dma

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Message-Id: <766e29dbb32987f714158eef827e706fd1157500.1737441631.git.viresh.kumar@linaro.org>
Date: Tue, 21 Jan 2025 12:26:40 +0530
From: Viresh Kumar <viresh.kumar@...aro.org>
To: Sudeep Holla <sudeep.holla@....com>
Cc: Viresh Kumar <viresh.kumar@...aro.org>,
	Vincent Guittot <vincent.guittot@...aro.org>,
	Alex Bennée <alex.bennee@...aro.org>,
	Bill Mills <bill.mills@...aro.org>,
	linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH 3/3] firmware: arm_ffa: Provide .dma_configure()

Provide .dma_configure() callback to make reserved-memory work for FFA
devices.

Signed-off-by: Viresh Kumar <viresh.kumar@...aro.org>
---
 drivers/firmware/arm_ffa/bus.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/drivers/firmware/arm_ffa/bus.c b/drivers/firmware/arm_ffa/bus.c
index ca526e438e71..e7fd25ba71a4 100644
--- a/drivers/firmware/arm_ffa/bus.c
+++ b/drivers/firmware/arm_ffa/bus.c
@@ -110,12 +110,21 @@ static struct attribute *ffa_device_attributes_attrs[] = {
 };
 ATTRIBUTE_GROUPS(ffa_device_attributes);
 
+static int ffa_Device_dma_configure(struct device *dev)
+{
+	if (dev->of_node)
+		return of_dma_configure(dev, dev->of_node, true);
+
+	return 0;
+}
+
 const struct bus_type ffa_bus_type = {
 	.name		= "arm_ffa",
 	.match		= ffa_device_match,
 	.probe		= ffa_device_probe,
 	.remove		= ffa_device_remove,
 	.uevent		= ffa_device_uevent,
+	.dma_configure	= ffa_Device_dma_configure,
 	.dev_groups	= ffa_device_attributes_groups,
 };
 EXPORT_SYMBOL_GPL(ffa_bus_type);
-- 
2.31.1.272.g89b43f80a514