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[RFC,2/4] spi: dw-mmio: add device tree support

Message ID 4859e838c549175fbff8d5a6a70f5a02ce51008c.1390481413.git.baruch@tkos.co.il (mailing list archive)
State Changes Requested
Headers show

Commit Message

Baruch Siach Jan. 23, 2014, 1:05 p.m. UTC 
Cc: Jean-Hugues Deschenes <jean-hugues.deschenes@octasic.com>
Signed-off-by: Baruch Siach <baruch@tkos.co.il>
---
 drivers/spi/spi-dw-mmio.c | 17 ++++++++++++++++-
 1 file changed, 16 insertions(+), 1 deletion(-)

Comments

Mark Brown Jan. 23, 2014, 1:20 p.m. UTC | #1 
On Thu, Jan 23, 2014 at 03:05:57PM +0200, Baruch Siach wrote:
> Cc: Jean-Hugues Deschenes <jean-hugues.deschenes@octasic.com>
> Signed-off-by: Baruch Siach <baruch@tkos.co.il>
> ---
>  drivers/spi/spi-dw-mmio.c | 17 ++++++++++++++++-
>  1 file changed, 16 insertions(+), 1 deletion(-)

DT bindings need a binding document.
diff mbox

Patch

diff --git a/drivers/spi/spi-dw-mmio.c b/drivers/spi/spi-dw-mmio.c
index 1492f5ee9aaa..b694f3f9b901 100644
--- a/drivers/spi/spi-dw-mmio.c
+++ b/drivers/spi/spi-dw-mmio.c
@@ -16,6 +16,7 @@ 
 #include <linux/spi/spi.h>
 #include <linux/scatterlist.h>
 #include <linux/module.h>
+#include <linux/of.h>
 
 #include "spi-dw.h"
 
@@ -32,6 +33,7 @@  static int dw_spi_mmio_probe(struct platform_device *pdev)
 	struct dw_spi *dws;
 	struct resource *mem;
 	int ret;
+	u32 tmp;
 
 	dwsmmio = devm_kzalloc(&pdev->dev, sizeof(struct dw_spi_mmio),
 			GFP_KERNEL);
@@ -67,7 +69,11 @@  static int dw_spi_mmio_probe(struct platform_device *pdev)
 		return ret;
 
 	dws->bus_num = pdev->id;
-	dws->num_cs = 4;
+	ret = of_property_read_u32(pdev->dev.of_node, "num-cs", &tmp);
+	if (ret == 0)
+		dws->num_cs = tmp;
+	else
+		dws->num_cs = 4;
 	dws->max_freq = clk_get_rate(dwsmmio->clk);
 
 	ret = dw_spi_add_host(&pdev->dev, dws);
@@ -92,12 +98,21 @@  static int dw_spi_mmio_remove(struct platform_device *pdev)
 	return 0;
 }
 
+#ifdef CONFIG_OF
+static struct of_device_id dw_spi_dt_ids[] = {
+	{ .compatible = "snps,designware-spi" },
+	{}
+};
+MODULE_DEVICE_TABLE(of, dw_spi_dt_ids);
+#endif
+
 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 = of_match_ptr(dw_spi_dt_ids),
 	},
 };
 module_platform_driver(dw_spi_mmio_driver);