mfd: wm8994: Add some OF properties

Add properties for some of the more important bits of platform data and
fill out the binding document.

Not all of the current platform data is suitable for the sort of fixed
configuration that is done using DT, some of it should have runtime
mechanisms added instead and some is unlikely to ever be used in practical
systems.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Reviewed-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Tested-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>

1 files changed, 71 insertions, 2 deletions

diff --git a/drivers/mfd/wm8994-core.c b/drivers/mfd/wm8994-core.c
index 3f8d591e9fe2..00e4fe2f3c75 100644
--- a/drivers/mfd/wm8994-core.c
+++ b/drivers/mfd/wm8994-core.c
@@ -19,6 +19,9 @@
 #include <linux/err.h>
 #include <linux/delay.h>
 #include <linux/mfd/core.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+#include <linux/of_gpio.h>
 #include <linux/pm_runtime.h>
 #include <linux/regmap.h>
 #include <linux/regulator/consumer.h>
@@ -396,6 +399,60 @@ static const struct reg_default wm1811_reva_patch[] = {
         { 0x102, 0x0 },
 };
 
+#ifdef CONFIG_OF
+static int wm8994_set_pdata_from_of(struct wm8994 *wm8994)
+{
+        struct device_node *np = wm8994->dev->of_node;
+        struct wm8994_pdata *pdata = &wm8994->pdata;
+        int i;
+
+        if (!np)
+                return 0;
+
+        if (of_property_read_u32_array(np, "wlf,gpio-cfg", pdata->gpio_defaults,
+                                       ARRAY_SIZE(pdata->gpio_defaults)) >= 0) {
+                for (i = 0; i < ARRAY_SIZE(pdata->gpio_defaults); i++) {
+                        if (wm8994->pdata.gpio_defaults[i] == 0)
+                                pdata->gpio_defaults[i]
+                                        = WM8994_CONFIGURE_GPIO;
+                }
+        }
+
+        of_property_read_u32_array(np, "wlf,micbias-cfg", pdata->micbias,
+                                   ARRAY_SIZE(pdata->micbias));
+
+        pdata->lineout1_diff = true;
+        pdata->lineout2_diff = true;
+        if (of_find_property(np, "wlf,lineout1-se", NULL))
+                pdata->lineout1_diff = false;
+        if (of_find_property(np, "wlf,lineout2-se", NULL))
+                pdata->lineout2_diff = false;
+
+        if (of_find_property(np, "wlf,lineout1-feedback", NULL))
+                pdata->lineout1fb = true;
+        if (of_find_property(np, "wlf,lineout2-feedback", NULL))
+                pdata->lineout2fb = true;
+
+        if (of_find_property(np, "wlf,ldoena-always-driven", NULL))
+                pdata->lineout2fb = true;
+
+        pdata->ldo[0].enable = of_get_named_gpio(np, "wlf,ldo1ena", 0);
+        if (pdata->ldo[0].enable < 0)
+                pdata->ldo[0].enable = 0;
+
+        pdata->ldo[1].enable = of_get_named_gpio(np, "wlf,ldo2ena", 0);
+        if (pdata->ldo[1].enable < 0)
+                pdata->ldo[1].enable = 0;
+
+        return 0;
+}
+#else
+static int wm8994_set_pdata_from_of(struct wm8994 *wm8994)
+{
+        return 0;
+}
+#endif
+
 /*
  * Instantiate the generic non-control parts of the device.
  */
@@ -414,6 +471,10 @@ static int wm8994_device_init(struct wm8994 *wm8994, int irq)
         }
         pdata = &wm8994->pdata;
 
+        ret = wm8994_set_pdata_from_of(wm8994);
+        if (ret != 0)
+                return ret;
+
         dev_set_drvdata(wm8994->dev, wm8994);
 
         /* Add the on-chip regulators first for bootstrapping */
@@ -683,6 +744,7 @@ MODULE_DEVICE_TABLE(of, wm8994_of_match);
 static int wm8994_i2c_probe(struct i2c_client *i2c,
                                       const struct i2c_device_id *id)
 {
+        const struct of_device_id *of_id;
         struct wm8994 *wm8994;
         int ret;
 
@@ -693,7 +755,14 @@ static int wm8994_i2c_probe(struct i2c_client *i2c,
         i2c_set_clientdata(i2c, wm8994);
         wm8994->dev = &i2c->dev;
         wm8994->irq = i2c->irq;
-        wm8994->type = id->driver_data;
+
+        if (i2c->dev.of_node) {
+                of_id = of_match_device(wm8994_of_match, &i2c->dev);
+                if (of_id)
+                        wm8994->type = (int)of_id->data;
+        } else {
+                wm8994->type = id->driver_data;
+        }
 
         wm8994->regmap = devm_regmap_init_i2c(i2c, &wm8994_base_regmap_config);
         if (IS_ERR(wm8994->regmap)) {
@@ -733,7 +802,7 @@ static struct i2c_driver wm8994_i2c_driver = {
                 .name = "wm8994",
                 .owner = THIS_MODULE,
                 .pm = &wm8994_pm_ops,
-                .of_match_table = wm8994_of_match,
+                .of_match_table = of_match_ptr(wm8994_of_match),
         },
         .probe = wm8994_i2c_probe,
         .remove = wm8994_i2c_remove,