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intel_minnow_max.c: Add support for spi

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This commit also adds a bit of documentation on the low speed spi kernel module
required

Signed-off-by: Brendan Le Foll <brendan.le.foll@intel.com>
This commit is contained in:
Brendan Le Foll
2015-03-13 16:29:33 +00:00
parent 228b7b672d
commit c621fad5f3
2 changed files with 9 additions and 2 deletions
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8
docs/minnow_max.md
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@@ -12,6 +12,12 @@ Supported Firmware
------------------ ------------------
mraa has only been tested with 64 bit firmware version 0.73 or later. mraa has only been tested with 64 bit firmware version 0.73 or later.
SPI
---
For SPI support you need to load the low_speed_spidev kernel module and that
will create the /dev/spidev0.0 device node. Mraa only knows about this one SPI
bus and no other.
Interface notes Interface notes
--------------- ---------------
The low speed I/O connector supported as per table below. This assumes default The low speed I/O connector supported as per table below. This assumes default
@@ -22,8 +28,6 @@ will not behave as expected.
Documentation shows i2c on bus #5, ACPI shows it on bus #6, but driver uses Documentation shows i2c on bus #5, ACPI shows it on bus #6, but driver uses
bus #7. bus #7.
**SPI operation is not currently supported**
| MRAA Number | Physical Pin | Function | Sysfs GPIO | Notes | | MRAA Number | Physical Pin | Function | Sysfs GPIO | Notes |
|-------------|---------------|------------|------------|----------------------| |-------------|---------------|------------|------------|----------------------|
| 1 | 1 | GND | | | | 1 | 1 | GND | | |

3
src/x86/intel_minnow_max.c
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@@ -60,6 +60,9 @@ mraa_set_pininfo(mraa_board_t* board, int mraa_index, char *name, mraa_pincapabi
pin_info->pwm.pinmap = 0; pin_info->pwm.pinmap = 0;
pin_info->pwm.mux_total = 0; pin_info->pwm.mux_total = 0;
} }
if (caps.spi) {
pin_info->spi.mux_total = 0;
}
return MRAA_SUCCESS; return MRAA_SUCCESS;
} }
return MRAA_ERROR_INVALID_RESOURCE; return MRAA_ERROR_INVALID_RESOURCE;