gpiolib: i2c/spi drivers: handle rmmod better
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>
diff --git a/drivers/gpio/mcp23s08.c b/drivers/gpio/mcp23s08.c
index bb60e8c..7fb5b9d 100644
--- a/drivers/gpio/mcp23s08.c
+++ b/drivers/gpio/mcp23s08.c
@@ -239,6 +239,7 @@
mcp->chip.base = pdata->base;
mcp->chip.ngpio = 8;
mcp->chip.can_sleep = 1;
+ mcp->chip.owner = THIS_MODULE;
spi_set_drvdata(spi, mcp);
diff --git a/drivers/gpio/pca953x.c b/drivers/gpio/pca953x.c
index 6e72fd3..e0e0af5 100644
--- a/drivers/gpio/pca953x.c
+++ b/drivers/gpio/pca953x.c
@@ -189,6 +189,7 @@
gc->base = chip->gpio_start;
gc->ngpio = gpios;
gc->label = chip->client->name;
+ gc->owner = THIS_MODULE;
}
static int __devinit pca953x_probe(struct i2c_client *client)
diff --git a/drivers/gpio/pcf857x.c b/drivers/gpio/pcf857x.c
index c6b3b53..1106aa1 100644
--- a/drivers/gpio/pcf857x.c
+++ b/drivers/gpio/pcf857x.c
@@ -159,6 +159,7 @@
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