The spi data include: dma_type and version.
dma_type to decide the SPI xfer mode: = 1(pdc), = 2(dmaengine), 0(no dma, using PIO)
version to give the SPI ip version.
Signed-off-by: Wenyou Yang <wenyou.yang@xxxxxxxxx>
Cc: grant.likely@xxxxxxxxxxxx
Cc: rob@xxxxxxxxxxx
Cc: devicetree-discuss@xxxxxxxxxxxxxxxx
Cc: linux-doc@xxxxxxxxxxxxxxx
Cc: spi-devel-general@xxxxxxxxxxxxxxxxxxxxx
---
.../devicetree/bindings/spi/spi_atmel.txt | 4 +++
drivers/spi/spi-atmel.c | 28 ++++++++++++++++++++
2 files changed, 32 insertions(+)
diff --git a/Documentation/devicetree/bindings/spi/spi_atmel.txt b/Documentation/devicetree/bindings/spi/spi_atmel.txt
index 20cdc91..a1ceeb5 100644
--- a/Documentation/devicetree/bindings/spi/spi_atmel.txt
+++ b/Documentation/devicetree/bindings/spi/spi_atmel.txt
@@ -6,6 +6,8 @@ Required properties:
- interrupts: Should contain macb interrupt
- cs-gpio: Should contain the GPIOs used for chipselect.
- dma-mask: device coherent dma mask.
+- dma_type: The dma type supported by the spi of SoC: = 0 (no used), = 1 (pdc), = 2 (dma)
+- version: The version of the spi IP.
spi0: spi@f0000000 {
#address-cells = <1>;
@@ -19,5 +21,7 @@ spi0: spi@f0000000 {
&pioB 3 0 /* conflicts with ERXDV */
>;
dma-mask = <0xffffffff>;
+ dma_type = <1>;
+ version = <2>;
status = "disabled";
};
diff --git a/drivers/spi/spi-atmel.c b/drivers/spi/spi-atmel.c
index 568df5b..791800e 100644
--- a/drivers/spi/spi-atmel.c
+++ b/drivers/spi/spi-atmel.c
@@ -1467,6 +1467,30 @@ static void atmel_spi_cleanup(struct spi_device *spi)
kfree(asd);
}
+static int of_get_atmel_spi_data(struct device_node *np, struct atmel_spi *as)
+{
+ const __be32 *val;
+
+ val = of_get_property(np, "dma_type", NULL);
+ if (!val) {
+ pr_err("%s: have no 'dma_type' property\n",
+ np->full_name);
+ return -EINVAL;
+ }
+
+ as->data.dma_type = be32_to_cpup(val);
+
+ val = of_get_property(np, "version", NULL);
+ if (!val) {
+ pr_err("%s: have no 'version' property\n", np->full_name);
+ return -EINVAL;
+ }
+
+ as->data.version = be32_to_cpup(val);
+
+ return 0;
+}
+
/*-------------------------------------------------------------------------*/
static int __devinit atmel_spi_probe(struct platform_device *pdev)
@@ -1535,6 +1559,10 @@ static int __devinit atmel_spi_probe(struct platform_device *pdev)
if (ret)
goto out_unmap_regs;
+ ret = of_get_atmel_spi_data(pdev->dev.of_node, as);
+ if (ret)
+ goto out_unmap_regs;
+
/* Initialize the hardware */
clk_enable(clk);
spi_writel(as, CR, SPI_BIT(SWRST));
--
1.7.9.5
--
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