regulator: ab8500-ext: Enable for Device Tree

Here we use the OF regulator match facility to collect and populate
initialisation data from Device Tree if we're booting with it enabled.

Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Mark Brown <broonielinaro.org>

1 files changed, 25 insertions, 1 deletions

diff --git a/drivers/regulator/ab8500-ext.c b/drivers/regulator/ab8500-ext.c
index 95f495f51d00..4137a2fe42c3 100644
--- a/drivers/regulator/ab8500-ext.c
+++ b/drivers/regulator/ab8500-ext.c
@@ -16,9 +16,11 @@
 #include <linux/kernel.h>
 #include <linux/err.h>
 #include <linux/module.h>
+#include <linux/of.h>
 #include <linux/platform_device.h>
 #include <linux/regulator/driver.h>
 #include <linux/regulator/machine.h>
+#include <linux/regulator/of_regulator.h>
 #include <linux/mfd/abx500.h>
 #include <linux/mfd/abx500/ab8500.h>
 #include <linux/regulator/ab8500.h>
@@ -333,18 +335,37 @@ static struct ab8500_ext_regulator_info
         },
 };
 
+static struct of_regulator_match ab8500_ext_regulator_match[] = {
+        { .name = "ab8500_ext1", .driver_data = (void *) AB8500_EXT_SUPPLY1, },
+        { .name = "ab8500_ext2", .driver_data = (void *) AB8500_EXT_SUPPLY2, },
+        { .name = "ab8500_ext3", .driver_data = (void *) AB8500_EXT_SUPPLY3, },
+};
+
 int ab8500_ext_regulator_probe(struct platform_device *pdev)
 {
         struct ab8500 *ab8500 = dev_get_drvdata(pdev->dev.parent);
         struct ab8500_platform_data *ppdata;
         struct ab8500_regulator_platform_data *pdata;
+        struct device_node *np = pdev->dev.of_node;
         struct regulator_config config = { };
         int i, err;
 
+        if (np) {
+                err = of_regulator_match(&pdev->dev, np,
+                                         ab8500_ext_regulator_match,
+                                         ARRAY_SIZE(ab8500_ext_regulator_match));
+                if (err < 0) {
+                        dev_err(&pdev->dev,
+                                "Error parsing regulator init data: %d\n", err);
+                        return err;
+                }
+        }
+
         if (!ab8500) {
                 dev_err(&pdev->dev, "null mfd parent\n");
                 return -EINVAL;
         }
+
         ppdata = dev_get_platdata(ab8500->dev);
         if (!ppdata) {
                 dev_err(&pdev->dev, "null parent pdata\n");
@@ -385,8 +406,11 @@ int ab8500_ext_regulator_probe(struct platform_device *pdev)
                         pdata->ext_regulator[i].driver_data;
 
                 config.dev = &pdev->dev;
-                config.init_data = &pdata->ext_regulator[i];
                 config.driver_data = info;
+                config.of_node = ab8500_ext_regulator_match[i].of_node;
+                config.init_data = (np) ?
+                        ab8500_ext_regulator_match[i].init_data :
+                        &pdata->ext_regulator[i];
 
                 /* register regulator with framework */
                 info->rdev = regulator_register(&info->desc, &config);