diff options
| author | Wolfram Sang <w.sang@pengutronix.de> | 2011-12-13 10:12:48 +0100 |
|---|---|---|
| committer | Grant Likely <grant.likely@secretlab.ca> | 2011-12-13 11:14:35 -0700 |
| commit | 28538df0389a59ede9ccd6f327d2031f0044db87 (patch) | |
| tree | 55053eaeb036735c62948c92c78febc284341900 /drivers/gpio/gpio-mpc8xxx.c | |
| parent | 4d052213ff8f71a4a70fc4eed71b773cfde51fcf (diff) | |
| download | lwn-28538df0389a59ede9ccd6f327d2031f0044db87.tar.gz lwn-28538df0389a59ede9ccd6f327d2031f0044db87.zip | |
gpio: mpc8xxx: don't allow input-only pins to be output for MPC5121
Add a 5121-custom reject if an input-only pin is requested to be output
(see 18.3.1.1 in the refman). Also, rewrite mach-specific quirk setup to
consume less lines which scales better.
Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
[grant.likely: Fixed build error]
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Diffstat (limited to 'drivers/gpio/gpio-mpc8xxx.c')
| -rw-r--r-- | drivers/gpio/gpio-mpc8xxx.c | 18 |
1 files changed, 13 insertions, 5 deletions
diff --git a/drivers/gpio/gpio-mpc8xxx.c b/drivers/gpio/gpio-mpc8xxx.c index ec3fcf0a7e12..5cd04b65c556 100644 --- a/drivers/gpio/gpio-mpc8xxx.c +++ b/drivers/gpio/gpio-mpc8xxx.c @@ -132,6 +132,15 @@ static int mpc8xxx_gpio_dir_out(struct gpio_chip *gc, unsigned int gpio, int val return 0; } +static int mpc5121_gpio_dir_out(struct gpio_chip *gc, unsigned int gpio, int val) +{ + /* GPIO 28..31 are input only on MPC5121 */ + if (gpio >= 28) + return -EINVAL; + + return mpc8xxx_gpio_dir_out(gc, gpio, val); +} + static int mpc8xxx_gpio_to_irq(struct gpio_chip *gc, unsigned offset) { struct of_mm_gpio_chip *mm = to_of_mm_gpio_chip(gc); @@ -340,11 +349,10 @@ static void __init mpc8xxx_add_controller(struct device_node *np) mm_gc->save_regs = mpc8xxx_gpio_save_regs; gc->ngpio = MPC8XXX_GPIO_PINS; gc->direction_input = mpc8xxx_gpio_dir_in; - gc->direction_output = mpc8xxx_gpio_dir_out; - if (of_device_is_compatible(np, "fsl,mpc8572-gpio")) - gc->get = mpc8572_gpio_get; - else - gc->get = mpc8xxx_gpio_get; + gc->direction_output = of_device_is_compatible(np, "fsl,mpc5121-gpio") ? + mpc5121_gpio_dir_out : mpc8xxx_gpio_dir_out; + gc->get = of_device_is_compatible(np, "fsl,mpc8572-gpio") ? + mpc8572_gpio_get : mpc8xxx_gpio_get; gc->set = mpc8xxx_gpio_set; gc->to_irq = mpc8xxx_gpio_to_irq; |