[PATCH 4.14 06/30] drivers: soc: atmel: Avoid calling at91_soc_init on non AT91 SoCs

From: Greg Kroah-Hartman
Date: Tue Feb 02 2021 - 12:33:31 EST


From: Sudeep Holla <sudeep.holla@xxxxxxx>

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.ferre@xxxxxxxxxxxxx>
Cc: Alexandre Belloni <alexandre.belloni@xxxxxxxxxxx>
Cc: Ludovic Desroches <ludovic.desroches@xxxxxxxxxxxxx>
Cc: stable@xxxxxxxxxxxxxxx #4.12+
Signed-off-by: Sudeep Holla <sudeep.holla@xxxxxxx>
Signed-off-by: Alexandre Belloni <alexandre.belloni@xxxxxxxxxxx>
Link: https://lore.kernel.org/r/20201211135846.1334322-1-sudeep.holla@xxxxxxx
Signed-off-by: Arnd Bergmann <arnd@xxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

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

--- a/drivers/soc/atmel/soc.c
+++ b/drivers/soc/atmel/soc.c
@@ -246,8 +246,20 @@ 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;