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regulator: scmi: Allow for zero voltage domains

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SCMI Voltage protocol allows the platform to report no voltage domains
on discovery, while warning the user about such an odd configuration.
As a consequence this condition should not be treated as error by the SCMI
regulator driver either.

Allow SCMI regulator driver to probe successfully even when no voltage
domains are discovered.

Signed-off-by: Cristian Marussi <cristian.marussi@arm.com>
Link: https://lore.kernel.org/r/20230126180511.766373-1-cristian.marussi@arm.com
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Cristian Marussi 2023-01-26 18:05:11 +00:00 committed by Mark Brown
parent d5b4c8b909
commit 668f777d02
No known key found for this signature in database
GPG key ID: 24D68B725D5487D0
1 changed files with 6 additions and 10 deletions
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16
drivers/regulator/scmi-regulator.c
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@ -311,16 +311,12 @@ static int scmi_regulator_probe(struct scmi_device *sdev)
return PTR_ERR(voltage_ops);
num_doms = voltage_ops->num_domains_get(ph);
if (num_doms <= 0) {
if (!num_doms) {
dev_err(&sdev->dev,
"number of voltage domains invalid\n");
num_doms = -EINVAL;
} else {
dev_err(&sdev->dev,
"failed to get voltage domains - err:%d\n",
num_doms);
}
if (!num_doms)
return 0;
if (num_doms < 0) {
dev_err(&sdev->dev, "failed to get voltage domains - err:%d\n",
num_doms);
return num_doms;
}