add IXP4xx GPIOLIB support based on Chris' patch

[openwrt.git] / target / linux / ar7 / files / drivers / vlynq / vlynq.c

diff --git a/target/linux/ar7/files/drivers/vlynq/vlynq.c b/target/linux/ar7/files/drivers/vlynq/vlynq.c
index 3358bb7..25f303b 100644 (file)
--- a/target/linux/ar7/files/drivers/vlynq/vlynq.c
+++ b/target/linux/ar7/files/drivers/vlynq/vlynq.c
@@ -26,6 +26,7 @@
 #include <linux/platform_device.h>
 #include <linux/interrupt.h>
 #include <linux/device.h>
+#include <linux/delay.h>
 #include <linux/io.h>
 
 #include <linux/vlynq.h>
@@ -301,22 +302,18 @@ static int vlynq_device_match(struct device *dev,
 {
        struct vlynq_device *vdev = to_vlynq_device(dev);
        struct vlynq_driver *vdrv = to_vlynq_driver(drv);
-       struct plat_vlynq_ops *ops = dev->platform_data;
        struct vlynq_device_id *ids = vdrv->id_table;
-       u32 id = 0;
-       int result;
 
        while (ids->id) {
-               vdev->divisor = ids->divisor;
-               result = __vlynq_enable_device(vdev);
-               if (result == 0) {
-                       id = vlynq_reg_read(vdev->remote->chip);
-                       ops->off(vdev);
-                       if (ids->id == id) {
-                               vlynq_set_drvdata(vdev, ids);
-                               return 1;
-                       }
+               if (ids->id == vdev->dev_id) {
+                       vdev->divisor = ids->divisor;
+                       vlynq_set_drvdata(vdev, ids);
+                       printk(KERN_INFO "Driver found for VLYNQ " \
+                               "device: %08x\n", vdev->dev_id);
+                       return 1;
                }
+               printk(KERN_DEBUG "Not using the %08x VLYNQ device's driver" \
+                       " for VLYNQ device: %08x\n", ids->id, vdev->dev_id);
                ids++;
        }
        return 0;
@@ -369,20 +366,22 @@ static int __vlynq_enable_device(struct vlynq_device *dev)
        if (result)
                return result;
 
-       vlynq_reg_write(dev->local->control, 0);
-       vlynq_reg_write(dev->remote->control, 0);
-       if (vlynq_linked(dev)) {
-               printk(KERN_DEBUG "%s: using external clock\n",
-                       dev->dev.bus_id);
-               return 0;
-       }
-
        switch (dev->divisor) {
+       case vlynq_div_external:
        case vlynq_div_auto:
-               /* Only try locally supplied clock, others cause problems */
                vlynq_reg_write(dev->local->control, 0);
                vlynq_reg_write(dev->remote->control, 0);
-               for (i = vlynq_ldiv2; i <= vlynq_ldiv8; i++) {
+               if (vlynq_linked(dev)) {
+                       dev->divisor = vlynq_div_external;
+                       printk(KERN_DEBUG "%s: using external clock\n",
+                               dev->dev.bus_id);
+                       return 0;
+               }
+
+               /* Only try locally supplied clock, others cause problems */
+               for (i = dev->dev_id ? vlynq_ldiv2 : vlynq_ldiv8; dev->dev_id ?
+                               i <= vlynq_ldiv8 : i >= vlynq_ldiv2;
+                               dev->dev_id ? i++ : i--) {
                        vlynq_reg_write(dev->local->control,
                                        VLYNQ_CTRL_CLOCK_INT |
                                        VLYNQ_CTRL_CLOCK_DIV(i - vlynq_ldiv1));
@@ -602,6 +601,16 @@ static int vlynq_probe(struct platform_device *pdev)
               dev->dev.bus_id, (void *)dev->regs_start, dev->irq,
               (void *)dev->mem_start);
 
+       dev->dev_id = 0;
+       dev->divisor = vlynq_div_auto;
+       result = __vlynq_enable_device(dev);
+       if (result == 0) {
+               dev->dev_id = vlynq_reg_read(dev->remote->chip);
+               ((struct plat_vlynq_ops *)(dev->dev.platform_data))->off(dev);
+       }
+       if (dev->dev_id)
+               printk(KERN_INFO "Found a VLYNQ device: %08x\n", dev->dev_id);
+
        return 0;
 
 fail_register:
@@ -626,7 +635,7 @@ static int vlynq_remove(struct platform_device *pdev)
        return 0;
 }
 
-static struct platform_driver vlynq_driver = {
+static struct platform_driver vlynq_platform_driver = {
        .driver.name = "vlynq",
        .probe = vlynq_probe,
        .remove = __devexit_p(vlynq_remove),
@@ -648,7 +657,7 @@ static int __devinit vlynq_init(void)
        if (res)
                goto fail_bus;
 
-       res = platform_driver_register(&vlynq_driver);
+       res = platform_driver_register(&vlynq_platform_driver);
        if (res)
                goto fail_platform;
 
@@ -662,7 +671,7 @@ fail_bus:
 
 static void __devexit vlynq_exit(void)
 {
-       platform_driver_unregister(&vlynq_driver);
+       platform_driver_unregister(&vlynq_platform_driver);
        bus_unregister(&vlynq_bus_type);
 }