linux-kernel - [RESEND][PATCH 1/4] of: platform: populate /firmware/ node from of_platform_default_populate

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Message-Id: <1506595562-10592-2-git-send-email-sudeep.holla@arm.com>
Date:   Thu, 28 Sep 2017 11:45:59 +0100
From:   Sudeep Holla <sudeep.holla@....com>
To:     linux-arm-kernel@...ts.infradead.org
Cc:     Sudeep Holla <sudeep.holla@....com>, linux-kernel@...r.kernel.org,
        devicetree@...r.kernel.org, Rob Herring <robh+dt@...nel.org>,
        Arnd Bergmann <arnd@...db.de>, Rob Herring <robh@...nel.org>
Subject: [RESEND][PATCH 1/4] of: platform: populate /firmware/ node from of_platform_default_populate_init()

Since "/firmware" does not have its own "compatible" property as it's
just collection of nodes representing firmware interface, it's sub-nodes
are not populated during system initialization.

Currently different firmware drivers search the /firmware/ node and
populate the sub-node devices selectively. Instead we can populate
the /firmware/ node during init to avoid more drivers continuing to
populate the devices selectively.

To generalize the solution this patch populates the /firmware/ node
explicitly from of_platform_default_populate_init().

Cc: Arnd Bergmann <arnd@...db.de>
Cc: Rob Herring <robh@...nel.org>
Signed-off-by: Sudeep Holla <sudeep.holla@....com>
---
 drivers/of/platform.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/of/platform.c b/drivers/of/platform.c
index ac15d0e3d27d..3a213a6aee89 100644
--- a/drivers/of/platform.c
+++ b/drivers/of/platform.c
@@ -515,6 +515,10 @@ static int __init of_platform_default_populate_init(void)
 			of_platform_device_create(node, NULL, NULL);
 	}

+	node = of_find_node_by_path("/firmware");
+	if (node)
+		of_platform_populate(node, NULL, NULL, NULL);
+
 	/* Populate everything else. */
 	of_platform_default_populate(NULL, NULL, NULL);

-- 
2.7.4