diff options
| -rw-r--r-- | Documentation/devicetree/bindings/spi/snps,dw-apb-ssi.yaml | 2 | ||||
| -rw-r--r-- | drivers/spi/spi-dw-mmio.c | 22 |
2 files changed, 24 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/spi/snps,dw-apb-ssi.yaml b/Documentation/devicetree/bindings/spi/snps,dw-apb-ssi.yaml index 12ca108864c6..a47cb144b09f 100644 --- a/Documentation/devicetree/bindings/spi/snps,dw-apb-ssi.yaml +++ b/Documentation/devicetree/bindings/spi/snps,dw-apb-ssi.yaml @@ -74,6 +74,8 @@ properties: const: intel,keembay-ssi - description: Intel Thunder Bay SPI Controller const: intel,thunderbay-ssi + - description: Intel Mount Evans Integrated Management Complex SPI Controller + const: intel,mountevans-imc-ssi - description: AMD Pensando Elba SoC SPI Controller const: amd,pensando-elba-spi - description: Baikal-T1 SPI Controller diff --git a/drivers/spi/spi-dw-mmio.c b/drivers/spi/spi-dw-mmio.c index 5f2aee69c1c1..a699ce496cc5 100644 --- a/drivers/spi/spi-dw-mmio.c +++ b/drivers/spi/spi-dw-mmio.c @@ -236,6 +236,24 @@ static int dw_spi_intel_init(struct platform_device *pdev, return 0; } +/* + * DMA-based mem ops are not configured for this device and are not tested. + */ +static int dw_spi_mountevans_imc_init(struct platform_device *pdev, + struct dw_spi_mmio *dwsmmio) +{ + /* + * The Intel Mount Evans SoC's Integrated Management Complex DW + * apb_ssi_v4.02a controller has an errata where a full TX FIFO can + * result in data corruption. The suggested workaround is to never + * completely fill the FIFO. The TX FIFO has a size of 32 so the + * fifo_len is set to 31. + */ + dwsmmio->dws.fifo_len = 31; + + return 0; +} + static int dw_spi_canaan_k210_init(struct platform_device *pdev, struct dw_spi_mmio *dwsmmio) { @@ -405,6 +423,10 @@ static const struct of_device_id dw_spi_mmio_of_match[] = { { .compatible = "snps,dwc-ssi-1.01a", .data = dw_spi_hssi_init}, { .compatible = "intel,keembay-ssi", .data = dw_spi_intel_init}, { .compatible = "intel,thunderbay-ssi", .data = dw_spi_intel_init}, + { + .compatible = "intel,mountevans-imc-ssi", + .data = dw_spi_mountevans_imc_init, + }, { .compatible = "microchip,sparx5-spi", dw_spi_mscc_sparx5_init}, { .compatible = "canaan,k210-spi", dw_spi_canaan_k210_init}, { .compatible = "amd,pensando-elba-spi", .data = dw_spi_elba_init}, |