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gpiolib: i2c/spi drivers: handle rmmod better

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Use the newly introduced owner field in struct gpio_chip to protect the
current (small) set of non-SOC GPIO drivers from being unloaded while any of
their GPIOs are in use.

Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@pengutronix.de>
[ add mcp23s08 and pcf857x ]
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Guennadi Liakhovetski
2008-04-28 02:14:45 -07:00
committed by Linus Torvalds
parent 438d8908b3
commit d72cbed0c4
3 changed files with 3 additions and 0 deletions
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drivers/gpio/pcf857x.c
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@@ -159,6 +159,7 @@ static int pcf857x_probe(struct i2c_client *client)
gpio->chip.base = pdata->gpio_base;
gpio->chip.can_sleep = 1;
gpio->chip.owner = THIS_MODULE;
/* NOTE: the OnSemi jlc1562b is also largely compatible with
* these parts, notably for output. It has a low-resolution