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| author | Andy Shevchenko <andriy.shevchenko@linux.intel.com> | 2021-11-23 21:27:23 +0200 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2021-11-29 12:20:00 +0000 |
| commit | 8393961c53b31078cfc877bc00eb0f67e1474edd (patch) | |
| tree | f59813bbe0c0a032bc21c96ee996aaa235427035 /Documentation/spi/pxa2xx.rst | |
| parent | a9c8f68ce2c37ced2f7a8667eda71b7753ede398 (diff) | |
| download | linux-8393961c53b31078cfc877bc00eb0f67e1474edd.tar.gz linux-8393961c53b31078cfc877bc00eb0f67e1474edd.tar.bz2 linux-8393961c53b31078cfc877bc00eb0f67e1474edd.zip | |
spi: pxa2xx: Get rid of unused enable_loopback member
There is no user of the enable_loopback member in the struct pxa2xx_spi_chip.
Remote this legacy member completely.
The mentioned in the documentation the testing phase can be performed with
spidev_test tool.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20211123192723.44537-3-andriy.shevchenko@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'Documentation/spi/pxa2xx.rst')
| -rw-r--r-- | Documentation/spi/pxa2xx.rst | 6 |
1 files changed, 0 insertions, 6 deletions
diff --git a/Documentation/spi/pxa2xx.rst b/Documentation/spi/pxa2xx.rst index dfc7673ed15d..6347580826be 100644 --- a/Documentation/spi/pxa2xx.rst +++ b/Documentation/spi/pxa2xx.rst @@ -101,7 +101,6 @@ device. All fields are optional. u8 rx_threshold; u8 dma_burst_size; u32 timeout; - u8 enable_loopback; int gpio_cs; }; @@ -128,11 +127,6 @@ dependent on the SPI bus speed ("spi_board_info.max_speed_hz") and the specific slave device. Please note that the PXA2xx SSP 1 does not support trailing byte timeouts and must busy-wait any trailing bytes. -The "pxa2xx_spi_chip.enable_loopback" field is used to place the SSP porting -into internal loopback mode. In this mode the SSP controller internally -connects the SSPTX pin to the SSPRX pin. This is useful for initial setup -testing. - NOTE: the SPI driver cannot control the chip select if SSPFRM is used, so the chipselect is dropped after each spi_transfer. Most devices need chip select asserted around the complete message. Use SSPFRM as a GPIO (through a descriptor) |