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edison: add mraa_i2c_frequency replace hook for i2c-6

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Signed-off-by: Brendan Le Foll <brendan.le.foll@intel.com>
This commit is contained in:
Brendan Le Foll
2014-12-10 00:27:04 +00:00
parent ab3af9cc2d
commit cc9a4f59b5
3 changed files with 38 additions and 0 deletions
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1
include/mraa_adv_func.h
View File

@@ -48,6 +48,7 @@ typedef struct {
mraa_result_t (*i2c_init_pre) (unsigned int bus);
mraa_result_t (*i2c_init_post) (mraa_i2c_context dev);
mraa_result_t (*i2c_set_frequency_replace) (mraa_i2c_context dev, mraa_i2c_mode_t mode);
mraa_result_t (*aio_get_valid_fp) (mraa_aio_context dev);
mraa_result_t (*aio_init_pre) (unsigned int aio);

3
src/i2c/i2c.c
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@@ -138,6 +138,9 @@ mraa_i2c_init_raw(unsigned int bus)
mraa_result_t
mraa_i2c_frequency(mraa_i2c_context dev, mraa_i2c_mode_t mode)
{
if (advance_func->i2c_set_frequency_replace != NULL) {
return advance_func->i2c_set_frequency_replace(dev, mode);
}
return MRAA_ERROR_FEATURE_NOT_SUPPORTED;
}

34
src/x86/intel_edison_fab_c.c
View File

@@ -670,6 +670,38 @@ mraa_intel_edison_mmap_setup(mraa_gpio_context dev, mraa_boolean_t en)
return MRAA_SUCCESS;
}
mraa_result_t
mraa_intel_edison_i2c_freq(mraa_i2c_context dev, mraa_i2c_mode_t mode)
{
if (dev->busnum == 6) {
int sysnode = open("/sys/devices/pci0000:00/0000:00:09.1/i2c_dw_sysnode", O_RDWR);
if (sysnode == -1) {
return MRAA_ERROR_INVALID_RESOURCE;
}
char bu[5];
int length;
switch (mode) {
case MRAA_I2C_STD:
length = snprintf(bu, sizeof(bu), "std");
break;
case MRAA_I2C_FAST:
length = snprintf(bu, sizeof(bu), "fast");
break;
case MRAA_I2C_HIGH:
length = snprintf(bu, sizeof(bu), "high");
break;
}
if (write(sysnode, bu, length*sizeof(char)) == -1) {
close(sysnode);
return MRAA_ERROR_INVALID_RESOURCE;
}
close(sysnode);
return MRAA_SUCCESS;
}
return MRAA_ERROR_FEATURE_NOT_SUPPORTED;
}
mraa_result_t
mraa_intel_edison_miniboard(mraa_board_t* b)
{
@@ -691,6 +723,7 @@ mraa_intel_edison_miniboard(mraa_board_t* b)
advance_func->pwm_init_pre = &mraa_intel_edison_pwm_init_pre;
advance_func->i2c_init_pre = &mraa_intel_edison_i2c_init_pre;
advance_func->i2c_set_frequency_replace = &mraa_intel_edison_i2c_freq;
advance_func->spi_init_pre = &mraa_intel_edison_spi_init_pre;
advance_func->gpio_mode_replace = &mraa_intel_edsion_mb_gpio_mode;
advance_func->uart_init_pre = &mraa_intel_edison_uart_init_pre;
@@ -1072,6 +1105,7 @@ mraa_intel_edison_fab_c()
advance_func->gpio_init_post = &mraa_intel_edison_gpio_init_post;
advance_func->gpio_dir_post = &mraa_intel_edison_gpio_dir_post;
advance_func->i2c_init_pre = &mraa_intel_edison_i2c_init_pre;
advance_func->i2c_set_frequency_replace = &mraa_intel_edison_i2c_freq;
advance_func->aio_get_valid_fp = &mraa_intel_edison_aio_get_fp;
advance_func->aio_init_pre = &mraa_intel_edison_aio_init_pre;
advance_func->aio_init_post = &mraa_intel_edison_aio_init_post;