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spi: spi-axi-spi-engine: Add support for MOSI idle configuration

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Implement MOSI idle low and MOSI idle high to better support peripherals
that request specific MOSI behavior.

Acked-by: Nuno Sa <nuno.sa@analog.com>
Reviewed-by: David Lechner <dlechner@baylibre.com>
Signed-off-by: Marcelo Schmitt <marcelo.schmitt@analog.com>
Link: https://patch.msgid.link/f237166c7bbe0a1cdabce243b97484bf2f428143.1720810545.git.marcelo.schmitt@analog.com
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Marcelo Schmitt 2024-07-12 16:21:47 -03:00 committed by Mark Brown
parent 927d382c7e
commit a62073f4b2
No known key found for this signature in database
GPG Key ID: 24D68B725D5487D0
1 changed files with 12 additions and 3 deletions
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9
drivers/spi/spi-axi-spi-engine.c
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@ -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;
}
@ -692,10 +697,14 @@ 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_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)
return dev_err_probe(&pdev->dev, -EINVAL, "spi_clk rate is 0");