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gpio/pca953x: Deprecate meaningless device-tree bindings
The property 'polarity' is handled by the GPIO core, and the 'gpio-base' should be assigned automatically. It is meaningless in the device-tree, since GPIO's are identified by the "chip-name"/offset pair. This way, the whole pca953x_get_alt_pdata() can hopefully soon go away. We still need to check whether we really want GPIO-interrupt functionality by simply looking if the I2C node has an interrupts property defined, since this property is not used for anything else. Signed-off-by: David Jander <david@protonic.nl> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
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@ -21,7 +21,6 @@
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#include <linux/slab.h>
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#ifdef CONFIG_OF_GPIO
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#include <linux/of_platform.h>
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#include <linux/of_gpio.h>
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#endif
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#define PCA953X_INPUT 0
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@ -545,6 +544,7 @@ static void pca953x_irq_teardown(struct pca953x_chip *chip)
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#ifdef CONFIG_OF_GPIO
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/*
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* Translate OpenFirmware node properties into platform_data
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* WARNING: This is DEPRECATED and will be removed eventually!
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*/
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void
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pca953x_get_alt_pdata(struct i2c_client *client, int *gpio_base, int *invert)
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@ -559,6 +559,7 @@ pca953x_get_alt_pdata(struct i2c_client *client, int *gpio_base, int *invert)
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*gpio_base = -1;
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val = of_get_property(node, "linux,gpio-base", &size);
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WARN(val, "%s: device-tree property 'linux,gpio-base' is deprecated!", __func__);
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if (val) {
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if (size != sizeof(*val))
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dev_warn(&client->dev, "%s: wrong linux,gpio-base\n",
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@ -568,6 +569,7 @@ pca953x_get_alt_pdata(struct i2c_client *client, int *gpio_base, int *invert)
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}
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val = of_get_property(node, "polarity", NULL);
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WARN(val, "%s: device-tree property 'polarity' is deprecated!", __func__);
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if (val)
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*invert = *val;
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}
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@ -636,7 +638,7 @@ static int __devinit pca953x_probe(struct i2c_client *client,
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{
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struct pca953x_platform_data *pdata;
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struct pca953x_chip *chip;
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int irq_base=-1, invert=0;
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int irq_base=0, invert=0;
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int ret = 0;
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chip = kzalloc(sizeof(struct pca953x_chip), GFP_KERNEL);
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@ -651,6 +653,11 @@ static int __devinit pca953x_probe(struct i2c_client *client,
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chip->names = pdata->names;
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} else {
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pca953x_get_alt_pdata(client, &chip->gpio_start, &invert);
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#ifdef CONFIG_OF_GPIO
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/* If I2C node has no interrupts property, disable GPIO interrupts */
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if (of_find_property(client->dev.of_node, "interrupts", NULL) == NULL)
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irq_base = -1;
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#endif
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}
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chip->client = client;
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