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led: Add support for initializing onboard LEDs based on board definition

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1. Add support for initializing onboard LEDs based on board definition.
Maximum LED count has been set to 12.

2. Introduce mraa_led_init_raw API for initializing LEDs based on
function name. This API can be used by platforms which doesn't have mapping
in board definition.

Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
This commit is contained in:
Manivannan Sadhasivam
2018-08-30 15:18:39 +05:30
committed by Manivannan Sadhasivam
parent 6c0ec10ba1
commit 6fcd882d58
5 changed files with 83 additions and 7 deletions
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43
src/led/led.c
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@@ -127,7 +127,48 @@ mraa_led_init_internal(const char* led)
}
mraa_led_context
mraa_led_init(const char* led)
mraa_led_init(int index)
{
mraa_led_context dev = NULL;
char directory[MAX_SIZE];
struct stat dir;
if (plat == NULL) {
syslog(LOG_ERR, "led: init: platform not initialised");
return NULL;
}
if (plat->led_dev_count == 0) {
syslog(LOG_ERR, "led: init: no led device defined in platform");
return NULL;
}
if (index < 0) {
syslog(LOG_ERR, "led: init: led index cannot be negative");
return NULL;
}
if (index >= plat->led_dev_count) {
syslog(LOG_ERR, "led: init: requested led above led device count");
return NULL;
}
dev = mraa_led_init_internal((char*) plat->led_dev[index].name);
if (dev == NULL) {
return NULL;
}
snprintf(directory, MAX_SIZE, "%s/%s", SYSFS_CLASS_LED, dev->led_name);
if (stat(directory, &dir) == 0 && S_ISDIR(dir.st_mode)) {
syslog(LOG_NOTICE, "led: init: current user doesn't have access rights for using LED %s", dev->led_name);
}
strncpy(dev->led_path, (const char*) directory, sizeof(directory));
return dev;
}
mraa_led_context
mraa_led_init_raw(const char* led)
{
mraa_led_context dev = NULL;
char directory[MAX_SIZE];