pata_arasan: add Device Tree probing capability

SPEAr platforms now support DT and so must convert all drivers to support DT.
This patch adds DT probing support for Arasan Compact Flash controller and
updates its documentation too.

Signed-off-by: Viresh Kumar <viresh.kumar@linaro.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>

diff --git a/Documentation/devicetree/bindings/ata/pata-arasan.txt b/Documentation/devicetree/bindings/ata/pata-arasan.txt
new file mode 100644 (file)
index 0000000..95ec7f8
--- /dev/null
+++ b/Documentation/devicetree/bindings/ata/pata-arasan.txt
@@ -0,0 +1,17 @@
+* ARASAN PATA COMPACT FLASH CONTROLLER
+
+Required properties:
+- compatible: "arasan,cf-spear1340"
+- reg: Address range of the CF registers
+- interrupt-parent: Should be the phandle for the interrupt controller
+  that services interrupts for this device
+- interrupt: Should contain the CF interrupt number
+
+Example:
+
+       cf@fc000000 {
+               compatible = "arasan,cf-spear1340";
+               reg = <0xfc000000 0x1000>;
+               interrupt-parent = <&vic1>;
+               interrupts = <12>;
+       };

diff --git a/drivers/ata/pata_arasan_cf.c b/drivers/ata/pata_arasan_cf.c
index d82c6dc0c20c1717ad1b55d3e68183e2efb9cab1..26201ebef3ca652a16c12c6719eae2127ed212ad 100644 (file)
--- a/drivers/ata/pata_arasan_cf.c
+++ b/drivers/ata/pata_arasan_cf.c
@@ -31,6 +31,7 @@
 #include <linux/kernel.h>
 #include <linux/libata.h>
 #include <linux/module.h>
+#include <linux/of.h>
 #include <linux/pata_arasan_cf_data.h>
 #include <linux/platform_device.h>
 #include <linux/pm.h>
@@ -935,6 +936,14 @@ static int arasan_cf_resume(struct device *dev)
 
 static SIMPLE_DEV_PM_OPS(arasan_cf_pm_ops, arasan_cf_suspend, arasan_cf_resume);
 
+#ifdef CONFIG_OF
+static const struct of_device_id arasan_cf_id_table[] = {
+       { .compatible = "arasan,cf-spear1340" },
+       {}
+};
+MODULE_DEVICE_TABLE(of, arasan_cf_id_table);
+#endif
+
 static struct platform_driver arasan_cf_driver = {
        .probe          = arasan_cf_probe,
        .remove         = __devexit_p(arasan_cf_remove),
@@ -942,6 +951,7 @@ static struct platform_driver arasan_cf_driver = {
                .name   = DRIVER_NAME,
                .owner  = THIS_MODULE,
                .pm     = &arasan_cf_pm_ops,
+               .of_match_table = of_match_ptr(arasan_cf_id_table),
        },
 };