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Overlay for Microchip MCP23S08/17 SPI gpio expanders #1566

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merged 6 commits into from
Aug 19, 2016
Merged

Overlay for Microchip MCP23S08/17 SPI gpio expanders #1566

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c9d9b2a
Added Overlay for Microchip MCP23S08/17 SPI gpio expanders
wavelet2 Jul 21, 2016
6f61870
Added Overlay for Microchip MCP23S08/17 SPI gpio expanders
wavelet2 Jul 21, 2016
47a57f7
Update mcp23s17-overlay.dts
wavelet2 Aug 18, 2016
e6062e8
Update README
wavelet2 Aug 18, 2016
3f0189f
Update mcp23s17-overlay.dts
wavelet2 Aug 18, 2016
796f6e5
Update Makefile
wavelet2 Aug 18, 2016
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1 change: 1 addition & 0 deletions arch/arm/boot/dts/overlays/Makefile
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Original file line number Diff line number Diff line change
Expand Up @@ -48,6 +48,7 @@ dtbo-$(RPI_DT_OVERLAYS) += justboom-dac.dtbo
dtbo-$(RPI_DT_OVERLAYS) += justboom-digi.dtbo
dtbo-$(RPI_DT_OVERLAYS) += lirc-rpi.dtbo
dtbo-$(RPI_DT_OVERLAYS) += mcp23017.dtbo
dtbo-$(RPI_DT_OVERLAYS) += mcp23s17.dtbo
dtbo-$(RPI_DT_OVERLAYS) += mcp2515-can0.dtbo
dtbo-$(RPI_DT_OVERLAYS) += mcp2515-can1.dtbo
dtbo-$(RPI_DT_OVERLAYS) += mmc.dtbo
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24 changes: 24 additions & 0 deletions arch/arm/boot/dts/overlays/README
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Expand Up @@ -622,6 +622,30 @@ Params: gpiopin Gpio pin connected to the INTA output of the
addr I2C address of the MCP23017 (default: 0x20)


Name: mcp23s17
Info: Configures the MCP23S08/17 SPI GPIO expanders.
If devices are present on SPI1 or SPI2, those interfaces must be enabled
with one of the spi1-1/2/3cs and/or spi2-1/2/3cs overlays.
If interrupts are enabled for a device on a given CS# on a SPI bus, that
device must be the only one present on that SPI bus/CS#.
Load: dtoverlay=mcp23s17,<param>=<val>
Params: s08-spi<n>-<m>-present 4-bit integer, bitmap indicating MCP23S08
devices present on SPI<n>, CS#<m>

s17-spi<n>-<m>-present 8-bit integer, bitmap indicating MCP23S17
devices present on SPI<n>, CS#<m>

s08-spi<n>-<m>-int-gpio integer, enables interrupts on a single
MCP23S08 device on SPI<n>, CS#<m>, specifies
the GPIO pin to which INT output of MCP23S08
is connected.

s17-spi<n>-<m>-int-gpio integer, enables mirrored interrupts on a
single MCP23S17 device on SPI<n>, CS#<m>,
specifies the GPIO pin to which either INTA
or INTB output of MCP23S17 is connected.


Name: mcp2515-can0
Info: Configures the MCP2515 CAN controller on spi0.0
Load: dtoverlay=mcp2515-can0,<param>=<val>
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