linux-kernel - [PATCH 1/2] firmware: arm_scmi: mailbox: share shmem for protocols

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Message-Id: <1580993966-17757-1-git-send-email-peng.fan@nxp.com>
Date:   Thu,  6 Feb 2020 20:59:25 +0800
From:   peng.fan@....com
To:     sudeep.holla@....com
Cc:     viresh.kumar@...aro.org, f.fainelli@...il.com, linux-imx@....com,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        Peng Fan <peng.fan@....com>
Subject: [PATCH 1/2] firmware: arm_scmi: mailbox: share shmem for protocols

From: Peng Fan <peng.fan@....com>

When shmem property of protocol is not specificed, let it use
its parent's shmem property.

Signed-off-by: Peng Fan <peng.fan@....com>
---

Based on Viresh's V6 patchset.

 drivers/firmware/arm_scmi/mailbox.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/firmware/arm_scmi/mailbox.c b/drivers/firmware/arm_scmi/mailbox.c
index 73077bbc4ad9..68ed58e2a47a 100644
--- a/drivers/firmware/arm_scmi/mailbox.c
+++ b/drivers/firmware/arm_scmi/mailbox.c
@@ -69,6 +69,8 @@ static int mailbox_chan_setup(struct scmi_chan_info *cinfo, struct device *dev,
 		return -ENOMEM;
 
 	shmem = of_parse_phandle(cdev->of_node, "shmem", idx);
+	if (!shmem)
+		shmem = of_parse_phandle(dev->of_node, "shmem", idx);
 	ret = of_address_to_resource(shmem, 0, &res);
 	of_node_put(shmem);
 	if (ret) {
-- 
2.16.4