diff options
Diffstat (limited to 'drivers/gpio')
| -rw-r--r-- | drivers/gpio/pcf857x.c | 9 |
1 files changed, 4 insertions, 5 deletions
diff --git a/drivers/gpio/pcf857x.c b/drivers/gpio/pcf857x.c index 29f19ce3e80f..879b473aab5a 100644 --- a/drivers/gpio/pcf857x.c +++ b/drivers/gpio/pcf857x.c @@ -190,7 +190,6 @@ static int pcf857x_probe(struct i2c_client *client, pdata = client->dev.platform_data; if (!pdata) { dev_dbg(&client->dev, "no platform data\n"); - return -EINVAL; } /* Allocate, initialize, and register this gpio_chip. */ @@ -200,7 +199,7 @@ static int pcf857x_probe(struct i2c_client *client, mutex_init(&gpio->lock); - gpio->chip.base = pdata->gpio_base; + gpio->chip.base = pdata ? pdata->gpio_base : -1; gpio->chip.can_sleep = 1; gpio->chip.dev = &client->dev; gpio->chip.owner = THIS_MODULE; @@ -278,7 +277,7 @@ static int pcf857x_probe(struct i2c_client *client, * to zero, our software copy of the "latch" then matches the chip's * all-ones reset state. Otherwise it flags pins to be driven low. */ - gpio->out = ~pdata->n_latch; + gpio->out = pdata ? ~pdata->n_latch : ~0; status = gpiochip_add(&gpio->chip); if (status < 0) @@ -299,7 +298,7 @@ static int pcf857x_probe(struct i2c_client *client, /* Let platform code set up the GPIOs and their users. * Now is the first time anyone could use them. */ - if (pdata->setup) { + if (pdata && pdata->setup) { status = pdata->setup(client, gpio->chip.base, gpio->chip.ngpio, pdata->context); @@ -322,7 +321,7 @@ static int pcf857x_remove(struct i2c_client *client) struct pcf857x *gpio = i2c_get_clientdata(client); int status = 0; - if (pdata->teardown) { + if (pdata && pdata->teardown) { status = pdata->teardown(client, gpio->chip.base, gpio->chip.ngpio, pdata->context); |