Lines Matching +full:system +full:- +full:on +full:- +full:chip

21 .\" DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
36 .Bd -ragged -offset indent
45 .Bd -literal -offset indent
51 driver provides direct access to a slave device on the SPI bus.
54 device is associated with a single chip-select
55 line on the bus, and all I/O performed through that instance is done
56 with that chip-select line asserted.
58 SPI data transfers are inherently bi-directional; there are no separate
63 Likewise on a read operation, whatever data is in the buffer at the start
75 .Bl -tag -width indent
83 .Bd -literal
91 The buffers for the transfer are a previously-mmap'd region.
100 is non-zero, the data appears in the memory region immediately
104 .Bd -literal
132 based system, such as
136 .Bl -tag -width indent
143 Actual bus speed may be lower, depending on the capabilities of the SPI
146 The chip-select number to assert when performing I/O for this device.
147 Set the high bit (1 << 31) to invert the logic level of the chip select line.
149 The SPI mode (0-3) to use when communicating with this device.
154 based system, the spigen device is defined as a slave device subnode
161 The most commonly-used ones are documented below.
166 .Bl -tag -width indent
170 Chip select address of device.
171 .It Va spi-max-frequency
173 Actual bus speed may be lower, depending on the capabilities of the SPI
180 .Bl -tag -width indent
181 .It Va spi-cpha
184 .It Va spi-cpol
187 .It Va spi-cs-high
188 Empty property indicating the slave device requires chip select active high.
191 .Bl -tag -width -compact