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gpio.c: check that real gpio did initialise correctly

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On platforms without muxing perform a little more checking when the 'real'
linux/sysfs gpio is opened. We don't expect this to fail but on platforms where
the linux gpios can be changed depending on pinctrl/bios configuration this
might not always be the case.

Signed-off-by: Henry Bruce <henry.bruce@intel.com>
Signed-off-by: Brendan Le Foll <brendan.le.foll@intel.com>
This commit is contained in:
Henry Bruce
2014-11-14 16:32:55 -08:00
committed by Thomas Ingleby
parent 6bc2b0fb53
commit 57540cd86c
1 changed files with 4 additions and 0 deletions
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4
src/gpio/gpio.c
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@@ -75,6 +75,10 @@ mraa_gpio_init(int pin)
} }
mraa_gpio_context r = mraa_gpio_init_raw(plat->pins[pin].gpio.pinmap); mraa_gpio_context r = mraa_gpio_init_raw(plat->pins[pin].gpio.pinmap);
if (r == NULL) {
syslog(LOG_CRIT, "gpio: mraa_setup_gpio(%d) returned error %d", pin, r);
return NULL;
}
r->phy_pin = pin; r->phy_pin = pin;
if (advance_func->gpio_init_post != NULL) { if (advance_func->gpio_init_post != NULL) {