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gpio: chardev interface / multiple gpio support for sysfs

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Signed-off-by: Mihai Stefanescu <mihai.t.gh.stefanescu@gmail.com>
Signed-off-by: Brendan Le Foll <brendan.le.foll@intel.com>
This commit is contained in:
mihais
2017-09-23 17:13:06 +03:00
committed by Brendan Le Foll
parent fbc2ad6045
commit 2b98fc7869
7 changed files with 887 additions and 764 deletions
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39
src/mraa.c
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@@ -57,6 +57,7 @@
#include "firmata/firmata_mraa.h"
#include "grovepi/grovepi.h"
#include "gpio.h"
#include "gpio/gpio_chardev.h"
#include "version.h"
#include "i2c.h"
#include "pwm.h"
@@ -100,43 +101,7 @@ mraa_set_log_level(int level)
mraa_boolean_t mraa_is_kernel_chardev_interface_compatible()
{
struct utsname buf;
int status;
status = uname(&buf);
if (status) {
syslog(LOG_ERR, "uname() error");
return 0;
}
int major, minor;
char *token;
token = strtok(buf.release, ".");
if (token == NULL) {
syslog(LOG_ERR, "Could not find kernel version major number");
return 0;
}
status = mraa_atoi(token, &major);
if (status) {
syslog(LOG_ERR, "mraa_atoi() error");
return 0;
}
token = strtok(NULL, ".");
if (token == NULL) {
syslog(LOG_ERR, "Could not find kernel version minor number");
return 0;
}
status = mraa_atoi(token, &minor);
if (status) {
syslog(LOG_ERR, "mraa_atoi() error");
return 0;
}
if (major < 4 || minor < 8) {
syslog(LOG_ERR, "Kernel version %i.%i not supported for chardev interface. Need version 4.8 or newer!", major, minor);
if (mraa_get_number_of_gpio_chips() <= 0) {
return 0;
}