diff options
| author | David Jander <david@protonic.nl> | 2011-06-14 11:00:56 +0200 |
|---|---|---|
| committer | Grant Likely <grant.likely@secretlab.ca> | 2011-06-16 21:41:50 +0200 |
| commit | a57339b4b5daf23b4cec450b37906d5f8b5fa722 (patch) | |
| tree | 4c349041c3cb7939a2add5bd2b399f70ab3b604c /drivers/gpio/gpio-pca953x.c | |
| parent | gpio/pca953x: Remove dynamic platform data pointer (diff) | |
| download | linux-a57339b4b5daf23b4cec450b37906d5f8b5fa722.tar.xz linux-a57339b4b5daf23b4cec450b37906d5f8b5fa722.zip | |
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>
Diffstat (limited to 'drivers/gpio/gpio-pca953x.c')
| -rw-r--r-- | drivers/gpio/gpio-pca953x.c | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/drivers/gpio/gpio-pca953x.c b/drivers/gpio/gpio-pca953x.c index e6805b97d047..c43b8ff626a7 100644 --- a/drivers/gpio/gpio-pca953x.c +++ b/drivers/gpio/gpio-pca953x.c @@ -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; |