linux-kernel - [PATCH 12/12] of/platform: make the OF code aware of early platform drivers

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Date:   Fri, 11 May 2018 18:20:28 +0200
From:   Bartosz Golaszewski <brgl@...ev.pl>
To:     Sekhar Nori <nsekhar@...com>, Kevin Hilman <khilman@...nel.org>,
        David Lechner <david@...hnology.com>,
        Michael Turquette <mturquette@...libre.com>,
        Stephen Boyd <sboyd@...nel.org>, Arnd Bergmann <arnd@...db.de>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Mark Rutland <mark.rutland@....com>,
        Yoshinori Sato <ysato@...rs.sourceforge.jp>,
        Rich Felker <dalias@...c.org>,
        Andy Shevchenko <andy.shevchenko@...il.com>,
        Marc Zyngier <marc.zyngier@....com>,
        "Rafael J . Wysocki" <rafael.j.wysocki@...el.com>,
        Peter Rosin <peda@...ntia.se>, Jiri Slaby <jslaby@...e.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Daniel Lezcano <daniel.lezcano@...aro.org>,
        Geert Uytterhoeven <geert@...ux-m68k.org>,
        Magnus Damm <magnus.damm@...il.com>,
        Johan Hovold <johan@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Frank Rowand <frowand.list@...il.com>
Cc:     linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        devicetree@...r.kernel.org, linux-arch@...r.kernel.org,
        Bartosz Golaszewski <bgolaszewski@...libre.com>
Subject: [PATCH 12/12] of/platform: make the OF code aware of early platform drivers

From: Bartosz Golaszewski <bgolaszewski@...libre.com>

Check the relevant flag in the device node and skip the allocation
part for devices that were populated early.

Signed-off-by: Bartosz Golaszewski <bgolaszewski@...libre.com>
---
 drivers/of/platform.c | 15 ++++++++++++---
 1 file changed, 12 insertions(+), 3 deletions(-)

diff --git a/drivers/of/platform.c b/drivers/of/platform.c
index 0e554fe1f325..91760e2d3dc7 100644
--- a/drivers/of/platform.c
+++ b/drivers/of/platform.c
@@ -21,6 +21,7 @@
 #include <linux/of_irq.h>
 #include <linux/of_platform.h>
 #include <linux/platform_device.h>
+#include <linux/early_platform.h>
 
 const struct of_device_id of_default_bus_match_table[] = {
 	{ .compatible = "simple-bus", },
@@ -196,9 +197,17 @@ static struct platform_device *of_platform_device_create_pdata(
 	    of_node_test_and_set_flag(np, OF_POPULATED))
 		return NULL;
 
-	dev = of_device_alloc(np, bus_id, parent);
-	if (!dev)
-		goto err_clear_flag;
+	if (of_node_check_flag(np, OF_POPULATED_EARLY)) {
+		dev = of_early_to_platform_device(np);
+		if (IS_ERR(dev))
+			goto err_clear_flag;
+
+		of_device_init(dev, np, bus_id, parent);
+	} else {
+		dev = of_device_alloc(np, bus_id, parent);
+		if (!dev)
+			goto err_clear_flag;
+	}
 
 	dev->dev.bus = &platform_bus_type;
 	dev->dev.platform_data = platform_data;
-- 
2.17.0