Lines Matching +full:high +full:- +full:frequency

36 .Bd -ragged -offset indent
45 .Bd -literal -offset indent
54 device is associated with a single chip-select
56 with that chip-select line asserted.
58 SPI data transfers are inherently bi-directional; there are no separate
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
111 Get the maximum clock speed (bus frequency in Hertz) to be used
114 Set the maximum clock speed (bus frequency in Hertz) to be used
118 The actual bus frequency may be lower due to hardware limitations
136 .Bl -tag -width indent
142 The maximum bus frequency to use when communicating with this device.
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.
161 The most commonly-used ones are documented below.
166 .Bl -tag -width indent
171 .It Va spi-max-frequency
172 The maximum bus frequency to use when communicating with this slave device.
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