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spi: move spi setup from core into module

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Signed-off-by: Thomas Ingleby <thomas.c.ingleby@intel.com>
This commit is contained in:
Thomas Ingleby
2014-11-03 16:20:02 +00:00
parent ffd38bb68c
commit e39268899c
3 changed files with 48 additions and 58 deletions
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53
src/spi/spi.c
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@@ -52,21 +52,64 @@ struct _spi {
mraa_spi_context
mraa_spi_init(int bus)
{
if (plat == NULL) {
syslog(LOG_ERR, "spi: Platform Not Initialised");
return NULL;
}
if (plat->spi_bus_count >! 0) {
syslog(LOG_ERR, "spi: no spi buses defined in platform");
return NULL;
}
if (plat->spi_bus_count == 1) {
bus = plat->def_spi_bus;
}
if (bus >= plat->spi_bus_count) {
syslog(LOG_ERR, "spi: requested bus above spi bus count");
return NULL;
}
if (advance_func->spi_init_pre != NULL) {
if (advance_func->spi_init_pre(bus) != MRAA_SUCCESS)
return NULL;
}
mraa_spi_bus_t *spi = mraa_setup_spi(bus);
if (bus < 0) {
syslog(LOG_ERR, "spi: Failed. SPI platform Error");
return NULL;
int pos = plat->spi_bus[bus].sclk;
if (plat->pins[pos].spi.mux_total > 0) {
if (mraa_setup_mux_mapped(plat->pins[pos].spi) != MRAA_SUCCESS) {
syslog(LOG_ERR, "spi: failed to set-up spi sclk multiplexer");
return NULL;
}
}
pos = plat->spi_bus[bus].mosi;
if (plat->pins[pos].spi.mux_total > 0) {
if (mraa_setup_mux_mapped(plat->pins[pos].spi) != MRAA_SUCCESS) {
syslog(LOG_ERR, "spi: failed to set-up spi mosi multiplexer");
return NULL;
}
}
pos = plat->spi_bus[bus].miso;
if (plat->pins[pos].spi.mux_total > 0) {
if (mraa_setup_mux_mapped(plat->pins[pos].spi) != MRAA_SUCCESS) {
syslog(LOG_ERR, "spi: failed to set-up spi miso multiplexer");
return NULL;
}
}
pos = plat->spi_bus[bus].cs;
if (plat->pins[pos].spi.mux_total > 0) {
if (mraa_setup_mux_mapped(plat->pins[pos].spi) != MRAA_SUCCESS) {
syslog(LOG_ERR, "spi: failed to set-up spi cs multiplexer");
return NULL;
}
}
mraa_spi_context dev = (mraa_spi_context) malloc(sizeof(struct _spi));
memset(dev, 0, sizeof(struct _spi));
char path[MAX_SIZE];
sprintf(path, "/dev/spidev%u.%u", spi->bus_id, spi->slave_s);
sprintf(path, "/dev/spidev%u.%u",
plat->spi_bus[bus].bus_id, plat->spi_bus[bus].slave_s);
dev->devfd = open(path, O_RDWR);
if (dev->devfd < 0) {