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spi-pinmap: added spi checking functions.

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Signed-off-by: Thomas Ingleby <thomas.c.ingleby@intel.com>
This commit is contained in:
Thomas Ingleby
2014-05-14 16:06:57 +01:00
committed by Brendan Le Foll
parent ed23cc44e4
commit 352e1e084d
2 changed files with 36 additions and 0 deletions
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6
api/maa.h
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@@ -205,6 +205,12 @@ unsigned int maa_check_aio(int pin);
*/
unsigned int maa_check_i2c();
/** Check spi interface, sets up multiplexer on device.
*
* @return unsigned int if using /dev/spi-1.0 returned would be 1.0
*/
double maa_check_spi();
/** Check PWM
*
* Will check input is valid for pwm and will also setup required multiplexers.

30
src/maa.c
View File

@@ -143,6 +143,36 @@ maa_check_i2c(int bus_s)
return plat->i2c_bus[bus].bus_id;
}
double
maa_check_spi(int bus_s)
{
if (plat == NULL)
return -3;
if (plat->i2c_bus_count >! 0) {
fprintf(stderr, "No spi buses defined in platform");
return -1;
}
int bus = 0;
int pos = plat->spi_bus[0].sclk;
if (plat->pins[pos].spi.mux_total > 0)
if (maa_setup_mux_mapped(plat->pins[pos].spi) != MAA_SUCCESS)
return -2;
pos = plat->spi_bus[0].mosi;
if (plat->pins[pos].spi.mux_total > 0)
if (maa_setup_mux_mapped(plat->pins[pos].spi) != MAA_SUCCESS)
return -2;
pos = plat->spi_bus[0].miso;
if (plat->pins[pos].spi.mux_total > 0)
if (maa_setup_mux_mapped(plat->pins[pos].spi) != MAA_SUCCESS)
return -2;
return plat->spi_bus[bus].bus_id;
}
maa_pin_t*
maa_check_pwm(int pin)
{