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pcf857x: support working w/o platform data 

Provide sane defaults for pcf857x, so the driver can be used w/o providing
platform data (and thus can be simply bound via OF tree).

Signed-off-by: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
Cc: Jean Delvare <khali@linux-fr.org>
Cc: David Brownell <david-b@pacbell.net>
Cc: Grant Likely <grant.likely@secretlab.ca>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Dmitry Eremin-Solenikov 2010-08-10 18:02:24 -07:00 committed by Linus Torvalds
parent 4a22b8a4ad
commit 49946f6814
1 changed files with 4 additions and 5 deletions
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9
drivers/gpio/pcf857x.c
View File

@ -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);