SPI driver on some SoCs only differ in the fifosize of each
SPI channel. It is useless to duplicate the s3c64xx_spi_port_config structure
or create a compatible name for such a change.
We can get fifosize via the device tree nodes (not mandatory).
Also the device tree binding document was updated.
Signed-off-by: Youngmin Nam <ym0914@xxxxxxxxx>
---
Documentation/devicetree/bindings/spi/spi-samsung.txt | 6 ++++++
drivers/spi/spi-s3c64xx.c | 13 +++++++++++++
2 files changed, 19 insertions(+)
diff --git a/Documentation/devicetree/bindings/spi/spi-samsung.txt b/Documentation/devicetree/bindings/spi/spi-samsung.txt
index 6dbdeb3..5c4a08d 100644
--- a/Documentation/devicetree/bindings/spi/spi-samsung.txt
+++ b/Documentation/devicetree/bindings/spi/spi-samsung.txt
@@ -23,6 +23,11 @@ Required SoC Specific Properties:
- dma-names: Names for the dma channels. There must be at least one channel
named "tx" for transmit and named "rx" for receive.
+Optional SoC Specific properties:
+
+- samsung,spi-fifosize: The fifo size supported by the SPI channel
+
+
Required Board Specific Properties:
- #address-cells: should be 1.
@@ -73,6 +78,7 @@ Example:
dma-names = "tx", "rx";
#address-cells = <1>;
#size-cells = <0>;
+ samsung,spi-fifosize = <64>;
};
- Board Specific Portion:
diff --git a/drivers/spi/spi-s3c64xx.c b/drivers/spi/spi-s3c64xx.c
index 5a76a50..44f1aeb 100644
--- a/drivers/spi/spi-s3c64xx.c
+++ b/drivers/spi/spi-s3c64xx.c
@@ -1032,6 +1032,7 @@ static int s3c64xx_spi_probe(struct platform_device *pdev)
struct spi_master *master;
int ret, irq;
char clk_name[16];
+ int fifosize;
if (!sci && pdev->dev.of_node) {
sci = s3c64xx_spi_parse_dt(&pdev->dev);
@@ -1083,6 +1084,18 @@ static int s3c64xx_spi_probe(struct platform_device *pdev)
sdd->port_id = pdev->id;
}
+ if (pdev->dev.of_node) {
+ if (of_property_read_u32(pdev->dev.of_node,
+ "samsung,spi-fifosize", &fifosize)) {
+ } else {
+ sdd->port_conf->fifo_lvl_mask[sdd->port_id] =
+ (fifosize << 1) - 1;
+ dev_info(&pdev->dev, "PORT %d fifo_lvl_mask = 0x%x\n",
+ sdd->port_id,
+ sdd->port_conf->fifo_lvl_mask[sdd->port_id]);
+ }
+ }
+
sdd->cur_bpw = 8;
if (!sdd->pdev->dev.of_node && (!sci->dma_tx || !sci->dma_rx)) {
--
2.7.1
--
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