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intel_edison_fab_c.c: added spi_lsbmode_replace to return proper status

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Edison SPI driver doesn't support LSB_FIRST mode, we will now return
_FEATURE_NOT_SUPPORTED instead of _INVALID_RESOURCE
for attempts to enable it.

Closes #22.

Signed-off-by: Alex Tereschenko <alext.mkrs@gmail.com>
Signed-off-by: Brendan Le Foll <brendan.le.foll@intel.com>
This commit is contained in:
Alex Tereschenko
2015-06-15 21:20:02 +02:00
committed by Brendan Le Foll
parent 41d71e6ce2
commit ea31104db0
1 changed files with 26 additions and 0 deletions
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26
src/x86/intel_edison_fab_c.c
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@@ -26,6 +26,8 @@
#include <string.h> #include <string.h>
#include <sys/stat.h> #include <sys/stat.h>
#include <sys/mman.h> #include <sys/mman.h>
#include <sys/ioctl.h>
#include <linux/spi/spidev.h>
#include "common.h" #include "common.h"
#include "x86/intel_edison_fab_c.h" #include "x86/intel_edison_fab_c.h"
@@ -72,6 +74,29 @@ static int mmap_fd = 0;
static int mmap_size; static int mmap_size;
static unsigned int mmap_count = 0; static unsigned int mmap_count = 0;
mraa_result_t
mraa_intel_edison_spi_lsbmode_replace(mraa_spi_context dev, mraa_boolean_t lsb)
{
uint8_t lsb_mode = (uint8_t) lsb;
// Edison doesn't support LSB_FIRST, we need to react appropriately
if (!lsb) {
if (ioctl(dev->devfd, SPI_IOC_WR_LSB_FIRST, &lsb_mode) < 0) {
syslog(LOG_ERR, "spi: Failed to set bit order");
return MRAA_ERROR_INVALID_RESOURCE;
}
if (ioctl(dev->devfd, SPI_IOC_RD_LSB_FIRST, &lsb_mode) < 0) {
syslog(LOG_ERR, "spi: Failed to set bit order");
return MRAA_ERROR_INVALID_RESOURCE;
}
} else {
return MRAA_ERROR_FEATURE_NOT_SUPPORTED;
}
dev->lsb = lsb;
return MRAA_SUCCESS;
}
static mraa_result_t static mraa_result_t
mraa_intel_edison_pinmode_change(int sysfs, int mode) mraa_intel_edison_pinmode_change(int sysfs, int mode)
{ {
@@ -1122,6 +1147,7 @@ mraa_intel_edison_fab_c()
advance_func->uart_init_pre = &mraa_intel_edison_uart_init_pre; advance_func->uart_init_pre = &mraa_intel_edison_uart_init_pre;
advance_func->uart_init_post = &mraa_intel_edison_uart_init_post; advance_func->uart_init_post = &mraa_intel_edison_uart_init_post;
advance_func->gpio_mmap_setup = &mraa_intel_edison_mmap_setup; advance_func->gpio_mmap_setup = &mraa_intel_edison_mmap_setup;
advance_func->spi_lsbmode_replace = &mraa_intel_edison_spi_lsbmode_replace;
b->pins = (mraa_pininfo_t*) malloc(sizeof(mraa_pininfo_t) * MRAA_INTEL_EDISON_PINCOUNT); b->pins = (mraa_pininfo_t*) malloc(sizeof(mraa_pininfo_t) * MRAA_INTEL_EDISON_PINCOUNT);
if (b->pins == NULL) { if (b->pins == NULL) {