[PATCH 4.19 11/37] drivers: soc: atmel: Avoid calling at91_soc_init on non AT91 SoCs

[Greg Kroah-Hartman]

From: Sudeep Holla <sudeep.ho...@arm.com>

commit caab13b4960416b9fee83169a758eb0f31e65109 upstream.

Since at91_soc_init is called unconditionally from atmel_soc_device_init,
we get the following warning on all non AT91 SoCs:
        " AT91: Could not find identification node"

Fix the same by filtering with allowed AT91 SoC list.

Cc: Nicolas Ferre <nicolas.fe...@microchip.com>
Cc: Alexandre Belloni <alexandre.bell...@bootlin.com>
Cc: Ludovic Desroches <ludovic.desroc...@microchip.com>
Cc: sta...@vger.kernel.org #4.12+
Signed-off-by: Sudeep Holla <sudeep.ho...@arm.com>
Signed-off-by: Alexandre Belloni <alexandre.bell...@bootlin.com>
Link: https://lore.kernel.org/r/20201211135846.1334322-1-sudeep.ho...@arm.com
Signed-off-by: Arnd Bergmann <a...@arndb.de>
Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>

---
 drivers/soc/atmel/soc.c |   12 ++++++++++++
 1 file changed, 12 insertions(+)

--- a/drivers/soc/atmel/soc.c
+++ b/drivers/soc/atmel/soc.c
@@ -254,8 +254,20 @@ struct soc_device * __init at91_soc_init
        return soc_dev;
 }
 
+static const struct of_device_id at91_soc_allowed_list[] __initconst = {
+       { .compatible = "atmel,at91rm9200", },
+       { .compatible = "atmel,at91sam9", },
+       { .compatible = "atmel,sama5", },
+       { .compatible = "atmel,samv7", }
+};
+
 static int __init atmel_soc_device_init(void)
 {
+       struct device_node *np = of_find_node_by_path("/");
+
+       if (!of_match_node(at91_soc_allowed_list, np))
+               return 0;
+
        at91_soc_init(socs);
 
        return 0;