linux-kernel - [PATCH AUTOSEL 5.7 063/274] clocksource/drivers/timer-versatile: Clear OF

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Message-Id: <20200608230607.3361041-63-sashal@kernel.org>
Date:   Mon,  8 Jun 2020 19:02:36 -0400
From:   Sasha Levin <sashal@...nel.org>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     Saravana Kannan <saravanak@...gle.com>,
        Daniel Lezcano <daniel.lezcano@...aro.org>,
        Sasha Levin <sashal@...nel.org>,
        linux-arm-kernel@...ts.infradead.org
Subject: [PATCH AUTOSEL 5.7 063/274] clocksource/drivers/timer-versatile: Clear OF_POPULATED flag

From: Saravana Kannan <saravanak@...gle.com>

[ Upstream commit 7a3768c206a006525afc090f92d4d618d8356b92 ]

The commit 4f41fe386a94 ("clocksource/drivers/timer-probe: Avoid
creating dead devices") broke the handling of arm,vexpress-sysreg [1].

The arm,vexpress-sysreg device is handled by both timer-versatile.c and
drivers/mfd/vexpress-sysreg.c. While the timer driver doesn't use the
device, the mfd driver still needs a device to probe.

So, this patch clears the OF_POPULATED flag to continue creating the
device.

[1] - https://lore.kernel.org/lkml/20200324175955.GA16972@arm.com/

Fixes: 4f41fe386a94 ("clocksource/drivers/timer-probe: Avoid creating dead devices")
Signed-off-by: Saravana Kannan <saravanak@...gle.com>
Signed-off-by: Daniel Lezcano <daniel.lezcano@...aro.org>
Link: https://lore.kernel.org/r/20200324195302.203115-1-saravanak@google.com
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/clocksource/timer-versatile.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/clocksource/timer-versatile.c b/drivers/clocksource/timer-versatile.c
index e4ebb656d005..f5d017b31afa 100644
--- a/drivers/clocksource/timer-versatile.c
+++ b/drivers/clocksource/timer-versatile.c
@@ -6,6 +6,7 @@
 
 #include <linux/clocksource.h>
 #include <linux/io.h>
+#include <linux/of.h>
 #include <linux/of_address.h>
 #include <linux/sched_clock.h>
 
@@ -22,6 +23,8 @@ static int __init versatile_sched_clock_init(struct device_node *node)
 {
 	void __iomem *base = of_iomap(node, 0);
 
+	of_node_clear_flag(node, OF_POPULATED);
+
 	if (!base)
 		return -ENXIO;
 
-- 
2.25.1