mfd: Enable Device Tree for ab8500-core driver

This patch will allow the ab8500-core driver to be probed and set up
when booting when Device Tree is enabled. This includes platform ID
look-up which identifies the machine it is currently running on. If
we are undergoing a DT enabled boot, we will refuse to setup each of
the other ab8500-* devices, as they will be probed individually by DT.

Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>

diff --git a/drivers/mfd/ab8500-core.c b/drivers/mfd/ab8500-core.c
index fb807ab..dac0e29 100644 (file)
--- a/drivers/mfd/ab8500-core.c
+++ b/drivers/mfd/ab8500-core.c
@@ -20,6 +20,8 @@
 #include <linux/mfd/abx500/ab8500.h>
 #include <linux/mfd/dbx500-prcmu.h>
 #include <linux/regulator/ab8500.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
 
 /*
  * Interrupt register offsets
@@ -1205,11 +1207,20 @@ static struct attribute_group ab9540_attr_group = {
        .attrs  = ab9540_sysfs_entries,
 };
 
+static const struct of_device_id ab8500_match[] = {
+       {
+               .compatible = "stericsson,ab8500",
+               .data = (void *)AB8500_VERSION_AB8500,
+       },
+       {},
+};
+
 static int __devinit ab8500_probe(struct platform_device *pdev)
 {
        struct ab8500_platform_data *plat = dev_get_platdata(&pdev->dev);
        const struct platform_device_id *platid = platform_get_device_id(pdev);
-       enum ab8500_version version = platid->driver_data;
+       enum ab8500_version version = AB8500_VERSION_UNDEFINED;
+       struct device_node *np = pdev->dev.of_node;
        struct ab8500 *ab8500;
        struct resource *resource;
        int ret;
@@ -1222,6 +1233,14 @@ static int __devinit ab8500_probe(struct platform_device *pdev)
 
        if (plat)
                ab8500->irq_base = plat->irq_base;
+       else if (np)
+               ret = of_property_read_u32(np, "stericsson,irq-base", &ab8500->irq_base);
+
+       if (!ab8500->irq_base) {
+               dev_info(&pdev->dev, "couldn't find irq-base\n");
+               ret = -EINVAL;
+               goto out_free_ab8500;
+       }
 
        ab8500->dev = &pdev->dev;
 
@@ -1243,6 +1262,12 @@ static int __devinit ab8500_probe(struct platform_device *pdev)
 
        platform_set_drvdata(pdev, ab8500);
 
+       if (platid)
+               version = platid->driver_data;
+       else if (np)
+               version = (unsigned int)
+                       of_match_device(ab8500_match, &pdev->dev)->data;
+
        if (version != AB8500_VERSION_UNDEFINED)
                ab8500->version = version;
        else {
@@ -1348,29 +1373,32 @@ static int __devinit ab8500_probe(struct platform_device *pdev)
                        goto out_removeirq;
        }
 
-       ret = mfd_add_devices(ab8500->dev, 0, abx500_common_devs,
-                             ARRAY_SIZE(abx500_common_devs), NULL,
-                             ab8500->irq_base);
-
-       if (ret)
-               goto out_freeirq;
+       if (!np) {
+               ret = mfd_add_devices(ab8500->dev, 0, abx500_common_devs,
+                               ARRAY_SIZE(abx500_common_devs), NULL,
+                               ab8500->irq_base);
 
-       if (is_ab9540(ab8500))
-               ret = mfd_add_devices(ab8500->dev, 0, ab9540_devs,
-                             ARRAY_SIZE(ab9540_devs), NULL,
-                             ab8500->irq_base);
-       else
-               ret = mfd_add_devices(ab8500->dev, 0, ab8500_devs,
-                             ARRAY_SIZE(ab8500_devs), NULL,
-                             ab8500->irq_base);
+               if (ret)
+                       goto out_freeirq;
 
-       if (is_ab9540(ab8500) || is_ab8505(ab8500))
-               ret = mfd_add_devices(ab8500->dev, 0, ab9540_ab8505_devs,
-                             ARRAY_SIZE(ab9540_ab8505_devs), NULL,
-                             ab8500->irq_base);
+               if (is_ab9540(ab8500))
+                       ret = mfd_add_devices(ab8500->dev, 0, ab9540_devs,
+                                       ARRAY_SIZE(ab9540_devs), NULL,
+                                       ab8500->irq_base);
+               else
+                       ret = mfd_add_devices(ab8500->dev, 0, ab8500_devs,
+                                       ARRAY_SIZE(ab8500_devs), NULL,
+                                       ab8500->irq_base);
+               if (ret)
+                       goto out_freeirq;
 
-       if (ret)
-               goto out_freeirq;
+               if (is_ab9540(ab8500) || is_ab8505(ab8500))
+                       ret = mfd_add_devices(ab8500->dev, 0, ab9540_ab8505_devs,
+                                       ARRAY_SIZE(ab9540_ab8505_devs), NULL,
+                                       ab8500->irq_base);
+               if (ret)
+                       goto out_freeirq;
+       }
 
        if (!no_bm) {
                /* Add battery management devices */
@@ -1440,6 +1468,7 @@ static struct platform_driver ab8500_core_driver = {
        .driver = {
                .name = "ab8500-core",
                .owner = THIS_MODULE,
+               .of_match_table = ab8500_match,
        },
        .probe  = ab8500_probe,
        .remove = __devexit_p(ab8500_remove),