spi: dw-mmio: add devicetree support
Allow probing the dw-mmio from devicetree.
Signed-off-by: Steffen Trumtrar <s.trumtrar@pengutronix.de>
Signed-off-by: Mark Brown <broonie@linaro.org>
diff --git a/drivers/spi/spi-dw-mmio.c b/drivers/spi/spi-dw-mmio.c
index a5cba14..21ce0e3 100644
--- a/drivers/spi/spi-dw-mmio.c
+++ b/drivers/spi/spi-dw-mmio.c
@@ -16,7 +16,9 @@
#include <linux/spi/spi.h>
#include <linux/scatterlist.h>
#include <linux/module.h>
+#include <linux/of.h>
#include <linux/of_gpio.h>
+#include <linux/of_platform.h>
#include "spi-dw.h"
@@ -33,6 +35,7 @@
struct dw_spi *dws;
struct resource *mem;
int ret;
+ int num_cs;
dwsmmio = devm_kzalloc(&pdev->dev, sizeof(struct dw_spi_mmio),
GFP_KERNEL);
@@ -68,9 +71,16 @@
return ret;
dws->bus_num = pdev->id;
- dws->num_cs = 4;
+
dws->max_freq = clk_get_rate(dwsmmio->clk);
+ num_cs = 4;
+
+ if (pdev->dev.of_node)
+ of_property_read_u32(pdev->dev.of_node, "num-cs", &num_cs);
+
+ dws->num_cs = num_cs;
+
if (pdev->dev.of_node) {
int i;
@@ -114,12 +124,19 @@
return 0;
}
+static const struct of_device_id dw_spi_mmio_of_match[] = {
+ { .compatible = "snps,dw-apb-ssi", },
+ { /* end of table */}
+};
+MODULE_DEVICE_TABLE(of, dw_spi_mmio_of_match);
+
static struct platform_driver dw_spi_mmio_driver = {
.probe = dw_spi_mmio_probe,
.remove = dw_spi_mmio_remove,
.driver = {
.name = DRIVER_NAME,
.owner = THIS_MODULE,
+ .of_match_table = dw_spi_mmio_of_match,
},
};
module_platform_driver(dw_spi_mmio_driver);