diff options
| -rw-r--r-- | drivers/dma/Kconfig | 1 | ||||
| -rw-r--r-- | drivers/dma/dma-axi-dmac.c | 41 |
2 files changed, 42 insertions, 0 deletions
diff --git a/drivers/dma/Kconfig b/drivers/dma/Kconfig index 76859aa2688c..b1d109d62c15 100644 --- a/drivers/dma/Kconfig +++ b/drivers/dma/Kconfig @@ -102,6 +102,7 @@ config AXI_DMAC depends on MICROBLAZE || NIOS2 || ARCH_ZYNQ || ARCH_ZYNQMP || ARCH_SOCFPGA || COMPILE_TEST select DMA_ENGINE select DMA_VIRTUAL_CHANNELS + select REGMAP_MMIO help Enable support for the Analog Devices AXI-DMAC peripheral. This DMA controller is often used in Analog Device's reference designs for FPGA diff --git a/drivers/dma/dma-axi-dmac.c b/drivers/dma/dma-axi-dmac.c index 368f08cc29aa..c12bdc7832b1 100644 --- a/drivers/dma/dma-axi-dmac.c +++ b/drivers/dma/dma-axi-dmac.c @@ -18,6 +18,7 @@ #include <linux/of.h> #include <linux/of_dma.h> #include <linux/platform_device.h> +#include <linux/regmap.h> #include <linux/slab.h> #include <linux/fpga/adi-axi-common.h> @@ -678,6 +679,44 @@ static void axi_dmac_desc_free(struct virt_dma_desc *vdesc) kfree(container_of(vdesc, struct axi_dmac_desc, vdesc)); } +static bool axi_dmac_regmap_rdwr(struct device *dev, unsigned int reg) +{ + switch (reg) { + case AXI_DMAC_REG_IRQ_MASK: + case AXI_DMAC_REG_IRQ_SOURCE: + case AXI_DMAC_REG_IRQ_PENDING: + case AXI_DMAC_REG_CTRL: + case AXI_DMAC_REG_TRANSFER_ID: + case AXI_DMAC_REG_START_TRANSFER: + case AXI_DMAC_REG_FLAGS: + case AXI_DMAC_REG_DEST_ADDRESS: + case AXI_DMAC_REG_SRC_ADDRESS: + case AXI_DMAC_REG_X_LENGTH: + case AXI_DMAC_REG_Y_LENGTH: + case AXI_DMAC_REG_DEST_STRIDE: + case AXI_DMAC_REG_SRC_STRIDE: + case AXI_DMAC_REG_TRANSFER_DONE: + case AXI_DMAC_REG_ACTIVE_TRANSFER_ID: + case AXI_DMAC_REG_STATUS: + case AXI_DMAC_REG_CURRENT_SRC_ADDR: + case AXI_DMAC_REG_CURRENT_DEST_ADDR: + case AXI_DMAC_REG_PARTIAL_XFER_LEN: + case AXI_DMAC_REG_PARTIAL_XFER_ID: + return true; + default: + return false; + } +} + +static const struct regmap_config axi_dmac_regmap_config = { + .reg_bits = 32, + .val_bits = 32, + .reg_stride = 4, + .max_register = AXI_DMAC_REG_PARTIAL_XFER_ID, + .readable_reg = axi_dmac_regmap_rdwr, + .writeable_reg = axi_dmac_regmap_rdwr, +}; + /* * The configuration stored in the devicetree matches the configuration * parameters of the peripheral instance and allows the driver to know which @@ -882,6 +921,8 @@ static int axi_dmac_probe(struct platform_device *pdev) platform_set_drvdata(pdev, dmac); + devm_regmap_init_mmio(&pdev->dev, dmac->base, &axi_dmac_regmap_config); + return 0; err_unregister_of: |