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Commit a231b88c authored by Alexander Stein's avatar Alexander Stein Committed by Linus Walleij
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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: default avatarAlexander Stein <alexander.stein@systec-electronic.com>
Signed-off-by: default avatarLinus Walleij <linus.walleij@linaro.org>
parent 9c0b04bc

drivers/gpio/gpio-mcp23s08.c

+5 −0
Original line number Diff line number Diff line
@@ -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);