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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>
This commit is contained in:
David Jander 2011-06-14 11:00:56 +02:00 committed by Grant Likely
parent c6dcf59243
commit a57339b4b5
1 changed files with 9 additions and 2 deletions
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11
drivers/gpio/gpio-pca953x.c
View File

@ -21,7 +21,6 @@
#include <linux/slab.h>
#ifdef CONFIG_OF_GPIO
#include <linux/of_platform.h>
#include <linux/of_gpio.h>
#endif
#define PCA953X_INPUT 0
@ -545,6 +544,7 @@ static void pca953x_irq_teardown(struct pca953x_chip *chip)
#ifdef CONFIG_OF_GPIO
/*
* Translate OpenFirmware node properties into platform_data
* WARNING: This is DEPRECATED and will be removed eventually!
*/
void
pca953x_get_alt_pdata(struct i2c_client *client, int *gpio_base, int *invert)
@ -559,6 +559,7 @@ pca953x_get_alt_pdata(struct i2c_client *client, int *gpio_base, int *invert)
*gpio_base = -1;
val = of_get_property(node, "linux,gpio-base", &size);
WARN(val, "%s: device-tree property 'linux,gpio-base' is deprecated!", __func__);
if (val) {
if (size != sizeof(*val))
dev_warn(&client->dev, "%s: wrong linux,gpio-base\n",
@ -568,6 +569,7 @@ pca953x_get_alt_pdata(struct i2c_client *client, int *gpio_base, int *invert)
}
val = of_get_property(node, "polarity", NULL);
WARN(val, "%s: device-tree property 'polarity' is deprecated!", __func__);
if (val)
*invert = *val;
}
@ -636,7 +638,7 @@ static int __devinit pca953x_probe(struct i2c_client *client,
{
struct pca953x_platform_data *pdata;
struct pca953x_chip *chip;
int irq_base=-1, invert=0;
int irq_base=0, invert=0;
int ret = 0;
chip = kzalloc(sizeof(struct pca953x_chip), GFP_KERNEL);
@ -651,6 +653,11 @@ static int __devinit pca953x_probe(struct i2c_client *client,
chip->names = pdata->names;
} else {
pca953x_get_alt_pdata(client, &chip->gpio_start, &invert);
#ifdef CONFIG_OF_GPIO
/* If I2C node has no interrupts property, disable GPIO interrupts */
if (of_find_property(client->dev.of_node, "interrupts", NULL) == NULL)
irq_base = -1;
#endif
}
chip->client = client;