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mraa: add internal mraa_find_i2c_bus function

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Signed-off-by: Brendan Le Foll <brendan.le.foll@intel.com>
This commit is contained in:
Brendan Le Foll
2015-07-10 17:52:50 +01:00
parent f5d6a6dc18
commit df0dbb0c73
4 changed files with 123 additions and 81 deletions
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26
src/x86/intel_minnow_max.c
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@@ -31,9 +31,9 @@
#include "x86/intel_minnow_max.h"
#define PLATFORM_NAME "MinnowBoard MAX"
#define I2C_BUS_COUNT 10
#define I2C_BUS_DEFAULT 7
#define MAX_LENGTH 8
#define I2CNAME "designware"
int arch_nr_gpios_adjust = 0x100;
@@ -151,24 +151,22 @@ mraa_intel_minnow_max()
mraa_set_pininfo(b, 25, "S5_4", (mraa_pincapabilities_t){ 1, 1, 0, 0, 0, 0, 0, 0 }, 84);
mraa_set_pininfo(b, 26, "IBL8254", (mraa_pincapabilities_t){ 1, 1, 0, 0, 0, 0, 0, 0 }, 208);
// Set number of i2c adaptors
// Got this from running 'i2cdetect -l'
b->i2c_bus_count = I2C_BUS_COUNT;
// Disable all i2c adaptors
int ici;
for (ici = 0; ici < b->i2c_bus_count; ici++) {
b->i2c_bus[ici].bus_id = -1;
}
// Set number of i2c adaptors usable from userspace
b->i2c_bus_count = 2;
// Configure i2c adaptor #7 and make it the default
int pin_index_sda, pin_index_scl;
if (mraa_get_pin_index(b, "I2C_SDA", &pin_index_sda) == MRAA_SUCCESS &&
mraa_get_pin_index(b, "I2C_SCL", &pin_index_scl) == MRAA_SUCCESS) {
b->def_i2c_bus = I2C_BUS_DEFAULT;
b->i2c_bus[b->def_i2c_bus].bus_id = b->def_i2c_bus;
b->i2c_bus[b->def_i2c_bus].sda = pin_index_sda;
b->i2c_bus[b->def_i2c_bus].scl = pin_index_scl;
int bus = mraa_find_i2c_bus(I2CNAME, 0);
if (bus == -1) {
b->i2c_bus_count = 0;
} else {
b->def_i2c_bus = bus;
b->i2c_bus[b->def_i2c_bus].bus_id = b->def_i2c_bus;
b->i2c_bus[b->def_i2c_bus].sda = pin_index_sda;
b->i2c_bus[b->def_i2c_bus].scl = pin_index_scl;
}
}
// Configure PWM