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gpio: mcp23s08: Add simple IRQ support for SPI devices 

Currently this implementation only supports one IRQ for (all) SPI devices
using the same chip select.

Signed-off-by: Alexander Stein <alexander.stein@systec-electronic.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This commit is contained in:
Alexander Stein 2014-11-17 09:38:10 +01:00 committed by Linus Walleij
parent 9c0b04bcb3
commit a231b88cfc
1 changed files with 5 additions and 0 deletions
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5
drivers/gpio/gpio-mcp23s08.c
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@ -935,11 +935,14 @@ static int mcp23s08_probe(struct spi_device *spi)
return -ENOMEM;
spi_set_drvdata(spi, data);
spi->irq = irq_of_parse_and_map(spi->dev.of_node, 0);
for (addr = 0; addr < ARRAY_SIZE(pdata->chip); addr++) {
if (!(spi_present_mask & (1 << addr)))
continue;
chips--;
data->mcp[addr] = &data->chip[chips];
data->mcp[addr]->irq = spi->irq;
status = mcp23s08_probe_one(data->mcp[addr], &spi->dev, spi,
0x40 | (addr << 1), type, pdata,
addr);
@ -980,6 +983,8 @@ static int mcp23s08_remove(struct spi_device *spi)
if (!data->mcp[addr])
continue;
if (spi->irq && data->mcp[addr]->irq_controller)
mcp23s08_irq_teardown(data->mcp[addr]);
gpiochip_remove(&data->mcp[addr]->chip);
}
kfree(data);