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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.

Signed-off-by: Andrew Jeffery <andrew@aj.id.au>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Reviewed-by: Joel Stanley <joel@jms.id.au>
Reviewed-by: Cédric Le Goater <clg@kaod.org>
Signed-off-by: Pavel Machek <pavel@ucw.cz>
This commit is contained in:
Andrew Jeffery 2021-09-21 14:09:36 +09:30 committed by Pavel Machek
parent ca386253ff
commit e26557a0aa
1 changed files with 1 additions and 1 deletions
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2
drivers/leds/leds-pca955x.c
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@ -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);