[PATCH v2 08/10] dmaengine: sun6i: Add support for Allwinner A64 and compatibles

Stefan Brüns
2017-09-17T03:20:19Z

The A64 SoC has the same dma engine as the H3 (sun8i), with a
reduced amount of physical channels. To allow future reuse of the
compatible, leave the channel count etc. in the config data blank
and retrieve it from the devicetree.

Signed-off-by: Stefan Brüns <stefan.bruens@rwth-aachen.de>
---
drivers/dma/sun6i-dma.c | 23 +++++++++++++++++++++++
1 file changed, 23 insertions(+)

diff --git a/drivers/dma/sun6i-dma.c b/drivers/dma/sun6i-dma.c
index b5ecc97a0d5a..118b29bb1eac 100644
--- a/drivers/dma/sun6i-dma.c
+++ b/drivers/dma/sun6i-dma.c
@@ -1127,6 +1127,28 @@ static struct sun6i_dma_config sun8i_h3_dma_cfg = {
BIT(DMA_SLAVE_BUSWIDTH_8_BYTES);
};

+/*
+ * The A64 binding uses the number of dma channels from the
+ * device tree node.
+ */
+static struct sun6i_dma_config sun50i_a64_dma_cfg = {
+ .nr_max_channels = 0,
+ .nr_max_requests = 0,
+ .nr_max_vchans = 0,
+ .clock_autogate_enable = sun6i_enable_clock_autogate_h3;
+ .set_burst_length = sun6i_set_burst_length_h3;
+ .src_burst_lengths = BIT(1) | BIT(4) | BIT(8) | BIT(16);
+ .dst_burst_lengths = BIT(1) | BIT(4) | BIT(8) | BIT(16);
+ .src_addr_widths = BIT(DMA_SLAVE_BUSWIDTH_1_BYTE) |
+ BIT(DMA_SLAVE_BUSWIDTH_2_BYTES) |
+ BIT(DMA_SLAVE_BUSWIDTH_4_BYTES) |
+ BIT(DMA_SLAVE_BUSWIDTH_8_BYTES);
+ .dst_addr_widths = BIT(DMA_SLAVE_BUSWIDTH_1_BYTE) |
+ BIT(DMA_SLAVE_BUSWIDTH_2_BYTES) |
+ BIT(DMA_SLAVE_BUSWIDTH_4_BYTES) |
+ BIT(DMA_SLAVE_BUSWIDTH_8_BYTES);
+};
+
/*
* The V3s have only 8 physical channels, a maximum DRQ port id of 23,
* and a total of 24 usable source and destination endpoints.
@@ -1154,6 +1176,7 @@ static const struct of_device_id sun6i_dma_match[] = {
{ .compatible = "allwinner,sun8i-a83t-dma", .data = &sun8i_a83t_dma_cfg },
{ .compatible = "allwinner,sun8i-h3-dma", .data = &sun8i_h3_dma_cfg },
{ .compatible = "allwinner,sun8i-v3s-dma", .data = &sun8i_v3s_dma_cfg },
+ { .compatible = "allwinner,sun50i-a64-dma", .data = &sun50i_a64_dma_cfg },
{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(of, sun6i_dma_match);
--
2.14.1