From: Marcelo Schmitt Date: Fri, 12 Jul 2024 19:21:47 +0000 (-0300) Subject: spi: spi-axi-spi-engine: Add support for MOSI idle configuration X-Git-Tag: v6.12-rc1~189^2~45^2~1 X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=a62073f4b2164028fc7c5ae45ceba10c9326cd91;p=thirdparty%2Fkernel%2Flinux.git 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 Reviewed-by: David Lechner Signed-off-by: Marcelo Schmitt Link: https://patch.msgid.link/f237166c7bbe0a1cdabce243b97484bf2f428143.1720810545.git.marcelo.schmitt@analog.com Signed-off-by: Mark Brown --- diff --git a/drivers/spi/spi-axi-spi-engine.c b/drivers/spi/spi-axi-spi-engine.c index 447e5a962dee8..8ad86f53ca504 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)