diff options
| author | Marcelo Schmitt <[email protected]> | 2024-07-12 19:21:47 +0000 |
|---|---|---|
| committer | Mark Brown <[email protected]> | 2024-07-29 00:19:54 +0000 |
| commit | a62073f4b2164028fc7c5ae45ceba10c9326cd91 (patch) | |
| tree | f24b514e1b2c08ad6c7208d7c994e049e2e129db /drivers/spi/spi-axi-spi-engine.c | |
| parent | spi: spi-gpio: Add support for MOSI idle state configuration (diff) | |
| download | kernel-a62073f4b2164028fc7c5ae45ceba10c9326cd91.tar.gz kernel-a62073f4b2164028fc7c5ae45ceba10c9326cd91.zip | |
spi: spi-axi-spi-engine: Add support for MOSI idle configuration
Implement MOSI idle low and MOSI idle high to better support peripherals
that request specific MOSI behavior.
Acked-by: Nuno Sa <[email protected]>
Reviewed-by: David Lechner <[email protected]>
Signed-off-by: Marcelo Schmitt <[email protected]>
Link: https://patch.msgid.link/f237166c7bbe0a1cdabce243b97484bf2f428143.1720810545.git.marcelo.schmitt@analog.com
Signed-off-by: Mark Brown <[email protected]>
Diffstat (limited to 'drivers/spi/spi-axi-spi-engine.c')
| -rw-r--r-- | drivers/spi/spi-axi-spi-engine.c | 15 |
1 files changed, 12 insertions, 3 deletions
diff --git a/drivers/spi/spi-axi-spi-engine.c b/drivers/spi/spi-axi-spi-engine.c index 447e5a962dee..8ad86f53ca50 100644 --- a/drivers/spi/spi-axi-spi-engine.c +++ b/drivers/spi/spi-axi-spi-engine.c @@ -41,6 +41,7 @@ #define SPI_ENGINE_CONFIG_CPHA BIT(0) #define SPI_ENGINE_CONFIG_CPOL BIT(1) #define SPI_ENGINE_CONFIG_3WIRE BIT(2) +#define SPI_ENGINE_CONFIG_SDO_IDLE_HIGH BIT(3) #define SPI_ENGINE_INST_TRANSFER 0x0 #define SPI_ENGINE_INST_ASSERT 0x1 @@ -137,6 +138,10 @@ static unsigned int spi_engine_get_config(struct spi_device *spi) config |= SPI_ENGINE_CONFIG_CPHA; if (spi->mode & SPI_3WIRE) config |= SPI_ENGINE_CONFIG_3WIRE; + if (spi->mode & SPI_MOSI_IDLE_HIGH) + config |= SPI_ENGINE_CONFIG_SDO_IDLE_HIGH; + if (spi->mode & SPI_MOSI_IDLE_LOW) + config &= ~SPI_ENGINE_CONFIG_SDO_IDLE_HIGH; return config; } @@ -692,9 +697,13 @@ static int spi_engine_probe(struct platform_device *pdev) host->num_chipselect = 8; /* Some features depend of the IP core version. */ - if (ADI_AXI_PCORE_VER_MINOR(version) >= 2) { - host->mode_bits |= SPI_CS_HIGH; - host->setup = spi_engine_setup; + if (ADI_AXI_PCORE_VER_MAJOR(version) >= 1) { + if (ADI_AXI_PCORE_VER_MINOR(version) >= 2) { + host->mode_bits |= SPI_CS_HIGH; + host->setup = spi_engine_setup; + } + if (ADI_AXI_PCORE_VER_MINOR(version) >= 3) + host->mode_bits |= SPI_MOSI_IDLE_LOW | SPI_MOSI_IDLE_HIGH; } if (host->max_speed_hz == 0) |