linux-kernel - [PATCH v2 4/5] firmware: arm_scmi: Use max_msg and max_msg

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Message-ID: <20241021170726.2564329-5-cristian.marussi@arm.com>
Date: Mon, 21 Oct 2024 18:07:25 +0100
From: Cristian Marussi <cristian.marussi@....com>
To: linux-kernel@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
	arm-scmi@...r.kernel.org
Cc: sudeep.holla@....com,
	james.quinlan@...adcom.com,
	f.fainelli@...il.com,
	vincent.guittot@...aro.org,
	etienne.carriere@...com,
	peng.fan@....nxp.com,
	michal.simek@....com,
	quic_sibis@...cinc.com,
	quic_nkela@...cinc.com,
	dan.carpenter@...aro.org,
	Cristian Marussi <cristian.marussi@....com>
Subject: [PATCH v2 4/5] firmware: arm_scmi: Use max_msg and max_msg_size devicetree properties

Override the default built-in max_msg and max_msg_size transport properties
when the corresponding properties were found to be described in the
devicetree.

Signed-off-by: Cristian Marussi <cristian.marussi@....com>
---
v1 --> v2
- using new prefixed arm, properties
---
 drivers/firmware/arm_scmi/driver.c | 16 ++++++++++++++--
 1 file changed, 14 insertions(+), 2 deletions(-)

diff --git a/drivers/firmware/arm_scmi/driver.c b/drivers/firmware/arm_scmi/driver.c
index 015a4d52ae37..b9a1d8c1034f 100644
--- a/drivers/firmware/arm_scmi/driver.c
+++ b/drivers/firmware/arm_scmi/driver.c
@@ -3056,8 +3056,20 @@ static const struct scmi_desc *scmi_transport_setup(struct device *dev)
 	if (ret && ret != -EINVAL)
 		dev_err(dev, "Malformed max-rx-timeout-ms DT property.\n");
 
-	dev_info(dev, "SCMI max-rx-timeout: %dms\n",
-		 trans->desc->max_rx_timeout_ms);
+	ret = of_property_read_u32(dev->of_node, "arm,max-msg-size",
+				   &trans->desc->max_msg_size);
+	if (ret && ret != -EINVAL)
+		dev_err(dev, "Malformed arm,max-msg-size DT property.\n");
+
+	ret = of_property_read_u32(dev->of_node, "arm,max-msg",
+				   &trans->desc->max_msg);
+	if (ret && ret != -EINVAL)
+		dev_err(dev, "Malformed arm,max-msg DT property.\n");
+
+	dev_info(dev,
+		 "SCMI max-rx-timeout: %dms / max-msg-size: %dbytes / max-msg: %d\n",
+		 trans->desc->max_rx_timeout_ms, trans->desc->max_msg_size,
+		 trans->desc->max_msg);
 
 	return trans->desc;
 }
-- 
2.46.1