leds: pca955x: Allow zero LEDs to be specified
It's valid to use the PCA955x devices just for GPIOs and not for LEDs.
In this case, as PCA955X_TYPE_GPIO is now equivalent to
PCA955X_TYPE_NONE, remove the test for whether we have any child nodes
specified in the devicetree.
A consequence of this is it's now possible to bind the driver to a
PCA955x device when dynamically instantiated through the I2C subsystem's
`new_device` interface.
OpenBMC-Staging-Count: 1
Signed-off-by: Andrew Jeffery <andrew@aj.id.au>
Reviewed-by: Joel Stanley <joel@jms.id.au>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Link: https://lore.kernel.org/r/20210921043936.468001-3-andrew@aj.id.au
Signed-off-by: Joel Stanley <joel@jms.id.au>
diff --git a/drivers/leds/leds-pca955x.c b/drivers/leds/leds-pca955x.c
index 77c0f46..81aaf21 100644
--- a/drivers/leds/leds-pca955x.c
+++ b/drivers/leds/leds-pca955x.c
@@ -429,7 +429,7 @@ pca955x_get_pdata(struct i2c_client *client, struct pca955x_chipdef *chip)
int count;
count = device_get_child_node_count(&client->dev);
- if (!count || count > chip->bits)
+ if (count > chip->bits)
return ERR_PTR(-ENODEV);
pdata = devm_kzalloc(&client->dev, sizeof(*pdata), GFP_KERNEL);
