Implement MOSI idle low and MOSI idle high to better support peripherals
that request specific MOSI behavior.
Acked-by: Nuno Sa <nuno.sa@xxxxxxxxxx>
Reviewed-by: David Lechner <dlechner@xxxxxxxxxxxx>
Signed-off-by: Marcelo Schmitt <marcelo.schmitt@xxxxxxxxxx>
---
drivers/spi/spi-axi-spi-engine.c | 15 ++++++++++++---
1 file changed, 12 insertions(+), 3 deletions(-)
diff --git a/drivers/spi/spi-axi-spi-engine.c b/drivers/spi/spi-axi-spi-engine.c
index 3231f67ae265..e2042d7368bd 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;
}
@@ -682,9 +687,13 @@ 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)
--
2.43.0
