Linux clock framework development
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From: Tudor Ambarus <tudor.ambarus@microchip.com>
To: <mturquette@baylibre.com>, <sboyd@kernel.org>,
	<nicolas.ferre@microchip.com>, <alexandre.belloni@bootlin.com>,
	<ludovic.desroches@microchip.com>, <claudiu.beznea@microchip.com>,
	<mirq-linux@rere.qmqm.pl>, <saravanak@google.com>
Cc: <gregkh@linuxfoundation.org>, <linux-clk@vger.kernel.org>,
	<linux-arm-kernel@lists.infradead.org>,
	<linux-kernel@vger.kernel.org>,
	"Tudor Ambarus" <tudor.ambarus@microchip.com>
Subject: [PATCH] clk: at91: sama5d2: Mark device OF_POPULATED after setup
Date: Thu, 28 Jan 2021 12:44:46 +0200	[thread overview]
Message-ID: <20210128104446.164269-1-tudor.ambarus@microchip.com> (raw)

The sama5d2 requires the clock provider initialized before timers.
We can't use a platform driver for the sama5d2-pmc driver, as the
platform_bus_init() is called later on, after time_init().

As fw_devlink considers only devices, it does not know that the
pmc is ready. Hence probing of devices that depend on it fail:
probe deferral - supplier f0014000.pmc not ready

Fix this by setting the OF_POPULATED flag for the sama5d2_pmc
device node after successful setup. This will make
of_link_to_phandle() ignore the sama5d2_pmc device node as a
dependency, and consumer devices will be probed again.

Fixes: e590474768f1cc04 ("driver core: Set fw_devlink=on by default")
Signed-off-by: Tudor Ambarus <tudor.ambarus@microchip.com>
---
I'll be out of office, will check the rest of the at91 SoCs
at the begining of next week.

 drivers/clk/at91/sama5d2.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/clk/at91/sama5d2.c b/drivers/clk/at91/sama5d2.c
index 9a5cbc7cd55a..5eea2b4a63dd 100644
--- a/drivers/clk/at91/sama5d2.c
+++ b/drivers/clk/at91/sama5d2.c
@@ -367,6 +367,8 @@ static void __init sama5d2_pmc_setup(struct device_node *np)
 
 	of_clk_add_hw_provider(np, of_clk_hw_pmc_get, sama5d2_pmc);
 
+	of_node_set_flag(np, OF_POPULATED);
+
 	return;
 
 err_free:
-- 
2.25.1


             reply	other threads:[~2021-01-28 10:46 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-01-28 10:44 Tudor Ambarus [this message]
2021-01-28 17:01 ` [PATCH] clk: at91: sama5d2: Mark device OF_POPULATED after setup Saravana Kannan
2021-02-01 10:54   ` Geert Uytterhoeven
2021-02-01 17:16     ` Saravana Kannan
2021-02-09  7:55   ` Stephen Boyd
2021-02-09  9:11     ` Saravana Kannan
2021-02-09 15:21       ` Tudor.Ambarus
2021-02-09 19:06         ` Saravana Kannan
2021-02-10  8:09           ` Tudor.Ambarus
2021-02-09  9:42     ` Tudor.Ambarus

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