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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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110
src/gpio/gpio_chardev.c
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@@ -50,38 +50,74 @@
void
_mraa_free_gpio_groups(mraa_gpio_context dev)
{
mraa_gpiod_group_t gpio_group = dev->gpio_group;
mraa_gpiod_group_t gpio_iter;
for (int i = 0; i < dev->num_chips; ++i) {
if (gpio_group[i].is_required) {
free(gpio_group[i].gpio_lines);
free(gpio_group[i].rw_values);
free(gpio_group[i].gpio_group_to_pins_table);
for_each_gpio_group(gpio_iter, dev) {
free(gpio_iter->gpio_lines);
free(gpio_iter->rw_values);
free(gpio_iter->gpio_group_to_pins_table);
if (gpio_group[i].gpiod_handle != -1) {
close(gpio_group[i].gpiod_handle);
}
if (gpio_group[i].event_handles != NULL) {
for (int j = 0; j < gpio_group[i].num_gpio_lines; ++j) {
close(gpio_group[i].event_handles[j]);
}
free(gpio_group[i].event_handles);
}
close(gpio_group[i].dev_fd);
if (gpio_iter->gpiod_handle != -1) {
close(gpio_iter->gpiod_handle);
}
if (gpio_iter->event_handles != NULL) {
for (int j = 0; j < gpio_iter->num_gpio_lines; ++j) {
close(gpio_iter->event_handles[j]);
}
free(gpio_iter->event_handles);
}
close(gpio_iter->dev_fd);
}
free(gpio_group);
free(dev->gpio_group);
/* Also delete the pin to gpio chip mapping. */
free(dev->pin_to_gpio_table);
/* User provided array saved internally. */
free(dev->provided_pins);
/* Finally, delete event array. */
free(dev->events);
}
void
_mraa_close_gpio_event_handles(mraa_gpio_context dev)
{
mraa_gpiod_group_t gpio_iter;
for_each_gpio_group(gpio_iter, dev) {
if (gpio_iter->event_handles != NULL) {
for (int j = 0; j < gpio_iter->num_gpio_lines; ++j) {
close(gpio_iter->event_handles[j]);
}
free(gpio_iter->event_handles);
/* In the end, _mraa_free_gpio_groups will be called. */
gpio_iter->event_handles = NULL;
}
}
}
void
_mraa_close_gpio_desc(mraa_gpio_context dev)
{
mraa_gpiod_group_t gpio_iter;
for_each_gpio_group(gpio_iter, dev) {
if (gpio_iter->gpiod_handle != -1) {
close(gpio_iter->gpiod_handle);
gpio_iter->gpiod_handle = -1;
}
}
}
int
_mraa__mraa_gpiod_ioctl(int fd, unsigned long gpio_request, void* data)
_mraa_gpiod_ioctl(int fd, unsigned long gpio_request, void* data)
{
int status;
@@ -319,6 +355,37 @@ mraa_get_line_values(int line_handle, unsigned int num_lines, unsigned char outp
return status;
}
mraa_boolean_t
mraa_is_gpio_line_kernel_owned(mraa_gpiod_line_info *linfo)
{
return (linfo->flags & GPIOLINE_FLAG_IS_OUT);
}
mraa_boolean_t
mraa_is_gpio_line_dir_out(mraa_gpiod_line_info *linfo)
{
return (linfo->flags & GPIOLINE_FLAG_IS_OUT);
}
mraa_boolean_t
mraa_is_gpio_line_active_low(mraa_gpiod_line_info *linfo)
{
return (linfo->flags & GPIOLINE_FLAG_ACTIVE_LOW);
}
mraa_boolean_t
mraa_is_gpio_line_open_drain(mraa_gpiod_line_info *linfo)
{
return (linfo->flags & GPIOLINE_FLAG_OPEN_DRAIN);
}
mraa_boolean_t
mraa_is_gpio_line_open_source(mraa_gpiod_line_info *linfo)
{
return (linfo->flags & GPIOHANDLE_REQUEST_OPEN_SOURCE);
}
int
mraa_get_number_of_gpio_chips()
{
@@ -343,4 +410,3 @@ mraa_get_number_of_gpio_chips()
/* Assume opendir() error. */
return num_chips;
}