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gpio: mcp23s08: handle default gpio base

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Create default gpio base if neither device node nor
platform data is defined.

Cc: Stable <stable@vger.kernel.org>
Signed-off-by: Sonic Zhang <sonic.zhang@analog.com>
Reviewed-by: Alexandre Courbot <acourbot@nvidia.com>
Tested-by: Antonio Fiol <antonio@fiol.es>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This commit is contained in:
Sonic Zhang 2015-01-20 17:00:08 +08:00 committed by Linus Walleij
parent 3d009c8c61
commit b184c388f7
1 changed files with 10 additions and 7 deletions
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17
drivers/gpio/gpio-mcp23s08.c
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@ -801,9 +801,11 @@ static int mcp230xx_probe(struct i2c_client *client,
client->irq = irq_of_parse_and_map(client->dev.of_node, 0);
} else {
pdata = dev_get_platdata(&client->dev);
if (!pdata || !gpio_is_valid(pdata->base)) {
dev_dbg(&client->dev, "invalid platform data\n");
return -EINVAL;
if (!pdata) {
pdata = devm_kzalloc(&client->dev,
sizeof(struct mcp23s08_platform_data),
GFP_KERNEL);
pdata->base = -1;
}
}
@ -924,10 +926,11 @@ static int mcp23s08_probe(struct spi_device *spi)
} else {
type = spi_get_device_id(spi)->driver_data;
pdata = dev_get_platdata(&spi->dev);
if (!pdata || !gpio_is_valid(pdata->base)) {
dev_dbg(&spi->dev,
"invalid or missing platform data\n");
return -EINVAL;
if (!pdata) {
pdata = devm_kzalloc(&spi->dev,
sizeof(struct mcp23s08_platform_data),
GFP_KERNEL);
pdata->base = -1;
}
for (addr = 0; addr < ARRAY_SIZE(pdata->chip); addr++) {