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gpio-mcp23s08: i2c: auto-select base if no DT match or platform data

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The call to gpiochip_add made by this driver is capable of auto-selecting a
base if one is not provided. However, it was not called unless there was
already a DT entry or platform data. This patch calls it even if the base is
not already known so that gpiochip_add can attempt to find a usable base.

Signed-off-by: Daniel M. Weeks <dan@danweeks.net>
Acked-by: Lars Poeschel <poeschel@lemonage.de>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This commit is contained in:
Daniel M. Weeks 2013-07-19 00:19:58 -04:00 committed by Linus Walleij
parent 8b628c659c
commit 8a56406582
1 changed files with 4 additions and 5 deletions
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9
drivers/gpio/gpio-mcp23s08.c
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@ -520,14 +520,13 @@ static int mcp230xx_probe(struct i2c_client *client,
match = of_match_device(of_match_ptr(mcp23s08_i2c_of_match),
&client->dev);
if (match) {
pdata = client->dev.platform_data;
if (match || !pdata) {
base = -1;
pullups = 0;
} else {
pdata = client->dev.platform_data;
if (!pdata || !gpio_is_valid(pdata->base)) {
dev_dbg(&client->dev,
"invalid or missing platform data\n");
if (!gpio_is_valid(pdata->base)) {
dev_dbg(&client->dev, "invalid platform data\n");
return -EINVAL;
}
base = pdata->base;