From: Dinh Nguyen <dingu...@altera.com>
Add device tree bindings for designware spi modules,
specifically, spi-dw-mmio and spi-dw-pci.
Signed-off-by: Dinh Nguyen <dingu...@altera.com>
---
Documentation/devicetree/bindings/spi/spi-dw.txt | 20 +++++++++++++++
drivers/spi/spi-dw-mmio.c | 24 +++++++++++++++---
drivers/spi/spi-dw-pci.c | 29 +++++++++++++++++++---
3 files changed, 66 insertions(+), 7 deletions(-)
create mode 100644 Documentation/devicetree/bindings/spi/spi-dw.txt
diff --git a/Documentation/devicetree/bindings/spi/spi-dw.txt
b/Documentation/devicetree/bindings/spi/spi-dw.txt
new file mode 100644
index 0000000..10a6e9d
--- /dev/null
+++ b/Documentation/devicetree/bindings/spi/spi-dw.txt
@@ -0,0 +1,20 @@
+DesignWare SPI device
+
+Required properties:
+- compatible : should be "snps,dw-spi-mmio" or "snps,dw-spi-pci"
+- reg : offset and length of the register set for the device
+- interrupts: The interrupt number to the cpu. The interrupt specifier format
+ depends on the interrupt controller.
+- num-chipselect: Contains the number of the chipselect
+- bus-num: Bus number
+
+Example:
+ spi: spi@fff00000 {
+ compatible = "snps,dw-spi-mmio";
+ #address-cells = <1>;
+ #size-cells = <0>;
+ reg = <0xfff00000 0x1000>;
+ interrupts = <0 154 4>;
+ num-chipselect = <4>;
+ bus-num = <0>;
+ };
diff --git a/drivers/spi/spi-dw-mmio.c b/drivers/spi/spi-dw-mmio.c
index db2f1ba..555c47a 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"
@@ -31,7 +32,7 @@ static int __devinit dw_spi_mmio_probe(struct platform_device
*pdev)
struct dw_spi_mmio *dwsmmio;
struct dw_spi *dws;
struct resource *mem, *ioarea;
- int ret;
+ int ret, num_cs, bus_num;
dwsmmio = kzalloc(sizeof(struct dw_spi_mmio), GFP_KERNEL);
if (!dwsmmio) {
@@ -78,9 +79,19 @@ static int __devinit dw_spi_mmio_probe(struct
platform_device *pdev)
}
clk_enable(dwsmmio->clk);
+ ret = of_property_read_u32(pdev->dev.of_node, "num-chipselect",
&num_cs);
+ if (ret < 0)
+ dws->num_cs = 4;
+ else
+ dws->num_cs = num_cs;
+
+ ret = of_property_read_u32(pdev->dev.of_node, "bus-num", &bus_num);
+ if (ret < 0)
+ dws->bus_num = 0;
+ else
+ dws->bus_num = bus_num;
+
dws->parent_dev = &pdev->dev;
- dws->bus_num = 0;
- dws->num_cs = 4;
dws->max_freq = clk_get_rate(dwsmmio->clk);
ret = dw_spi_add_host(dws);
@@ -127,12 +138,19 @@ static int __devexit dw_spi_mmio_remove(struct
platform_device *pdev)
return 0;
}
+static struct of_device_id dw_spi_mmio_of_match[] __devinitdata = {
+ { .compatible = "snps,dw-spi-mmio", },
+ { /* sentinel */}
+};
+MODULE_DEVICE_TABLE(of, dw_spi_mmio_of_match);
+
static struct platform_driver dw_spi_mmio_driver = {
.probe = dw_spi_mmio_probe,
.remove = __devexit_p(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);
diff --git a/drivers/spi/spi-dw-pci.c b/drivers/spi/spi-dw-pci.c
index ff81abb..d6d9d77 100644
--- a/drivers/spi/spi-dw-pci.c
+++ b/drivers/spi/spi-dw-pci.c
@@ -22,6 +22,7 @@
#include <linux/slab.h>
#include <linux/spi/spi.h>
#include <linux/module.h>
+#include <linux/of.h>
#include "spi-dw.h"
@@ -38,7 +39,7 @@ static int __devinit spi_pci_probe(struct pci_dev *pdev,
struct dw_spi_pci *dwpci;
struct dw_spi *dws;
int pci_bar = 0;
- int ret;
+ int ret, num_cs, bus_num;
printk(KERN_INFO "DW: found PCI SPI controller(ID: %04x:%04x)\n",
pdev->vendor, pdev->device);
@@ -71,9 +72,19 @@ static int __devinit spi_pci_probe(struct pci_dev *pdev,
goto err_release_reg;
}
+ ret = of_property_read_u32(pdev->dev.of_node, "num-chipselect",
&num_cs);
+ if (ret < 0)
+ dws->num_cs = 4;
+ else
+ dws->num_cs = num_cs;
+
+ ret = of_property_read_u32(pdev->dev.of_node, "bus-num", &bus_num);
+ if (ret < 0)
+ dws->bus_num = 0;
+ else
+ dws->bus_num = bus_num;
+
dws->parent_dev = &pdev->dev;
- dws->bus_num = 0;
- dws->num_cs = 4;
dws->irq = pdev->irq;
/*
@@ -155,13 +166,23 @@ static DEFINE_PCI_DEVICE_TABLE(pci_ids) = {
{},
};
+static struct of_device_id dw_spi_pci_of_match[] __devinitdata = {
+ { .compatible = "snps,dw-spi-pci", },
+ { /* sentinel */}
+};
+MODULE_DEVICE_TABLE(of, dw_spi_pci_of_match);
+
static struct pci_driver dw_spi_driver = {
- .name = DRIVER_NAME,
.id_table = pci_ids,
.probe = spi_pci_probe,
.remove = __devexit_p(spi_pci_remove),
.suspend = spi_suspend,
.resume = spi_resume,
+ .driver = {
+ .name = DRIVER_NAME,
+ .owner = THIS_MODULE,
+ .of_match_table = dw_spi_pci_of_match,
+ },
};
module_pci_driver(dw_spi_driver);
--
1.7.9.5
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