Hi there,
this patch adds the following features to gpio-pca953x.c:
- set gpiobase to auto (-1) in case no platform data or openfirmware
config are provided
- show some details about the registered gpio-chip in kernel log (highly
inspired by gpio-pcf857x.c)
Successfully tested on ar71xx (TL-WR1043ND). Please let me know if there
is anything wrong. Otherwise, please add to kernel.
Signed-off-by: Hartmut Knaack <knaack.h [at] gmx.de>
*** /home/mbs/kerneltest/gpio-pca953x.c 2011-10-02 23:33:22.743267705 +0200
---
build_dir/linux-ar71xx_generic/linux-2.6.39.4/drivers/gpio/pca953x.c
2011-10-03 23:32:35.283870191 +0200
*************** pca953x_get_alt_pdata(struct i2c_client
*** 577,582 ****
--- 577,583 ----
void
pca953x_get_alt_pdata(struct i2c_client *client, int *gpio_base, int
*invert)
{
+ *gpio_base = -1;
}
#endif
*************** static int __devinit pca953x_probe(struc
*** 685,692 ****
ret = gpiochip_add(&chip->gpio_chip);
if (ret)
goto out_failed_irq;
! if (pdata && pdata->setup) {
ret = pdata->setup(client, chip->gpio_chip.base,
chip->gpio_chip.ngpio, pdata->context);
if (ret < 0)
--- 686,700 ----
ret = gpiochip_add(&chip->gpio_chip);
if (ret)
goto out_failed_irq;
+
+ dev_info(&client->dev, "gpios %d..%d added on a %s%s\n",
+ chip->gpio_chip.base,
+ chip->gpio_chip.base + chip->gpio_chip.ngpio - 1,
+ client->name,
+ client->irq ? " (irq ignored)" : "");
!
! if (pdata && pdata->setup) {
ret = pdata->setup(client, chip->gpio_chip.base,
chip->gpio_chip.ngpio, pdata->context);
if (ret < 0)
--
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