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fbdev/simplefb: Suppress error on missing power domains

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When the power domains are missing, the call to of_count_phandle_with_args
fails with -ENOENT. The power domains are not required and there are
some device trees that do not specify them. Suppress this error to fix
devices without power domains attached to simplefb.

Fixes: 92a511a568 ("fbdev/simplefb: Add support for generic power-domains")
Closes: https://lore.kernel.org/linux-fbdev/ZVwFNfkqjrvhFHM0@radian
Signed-off-by: Richard Acayan <mailingradian@gmail.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20231122005457.330066-3-mailingradian@gmail.com
This commit is contained in:
Richard Acayan 2023-11-21 19:54:59 -05:00 committed by Hans de Goede
parent a4dea9a06f
commit 9c6894320f
1 changed files with 4 additions and 0 deletions
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4
drivers/video/fbdev/simplefb.c
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@ -466,6 +466,10 @@ static int simplefb_attach_genpds(struct simplefb_par *par,
err = of_count_phandle_with_args(dev->of_node, "power-domains",
"#power-domain-cells");
if (err < 0) {
/* Nothing wrong if optional PDs are missing */
if (err == -ENOENT)
return 0;
dev_info(dev, "failed to parse power-domains: %d\n", err);
return err;
}