regulator: Fix WM831x regulator ID lookups for multiple WM831xs

With multiple wm831x devices the device IDs used for the regulators will
not always be contiguous so simply taking the modulus is not sufficient
to look up the ID, we need to reverse the way the ID is generated.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>

1 files changed, 22 insertions, 3 deletions

diff --git a/drivers/regulator/wm831x-ldo.c b/drivers/regulator/wm831x-ldo.c
index 2220cf8defb1..6709710a059e 100644
--- a/drivers/regulator/wm831x-ldo.c
+++ b/drivers/regulator/wm831x-ldo.c
@@ -310,11 +310,17 @@ static __devinit int wm831x_gp_ldo_probe(struct platform_device *pdev)
 {
         struct wm831x *wm831x = dev_get_drvdata(pdev->dev.parent);
         struct wm831x_pdata *pdata = wm831x->dev->platform_data;
-        int id = pdev->id % ARRAY_SIZE(pdata->ldo);
+        int id;
         struct wm831x_ldo *ldo;
         struct resource *res;
         int ret, irq;
 
+        if (pdata && pdata->wm831x_num)
+                id = (pdata->wm831x_num * 10) + 1;
+        else
+                id = 0;
+        id = pdev->id - id;
+
         dev_dbg(&pdev->dev, "Probing LDO%d\n", id + 1);
 
         if (pdata == NULL || pdata->ldo[id] == NULL)
@@ -574,11 +580,17 @@ static __devinit int wm831x_aldo_probe(struct platform_device *pdev)
 {
         struct wm831x *wm831x = dev_get_drvdata(pdev->dev.parent);
         struct wm831x_pdata *pdata = wm831x->dev->platform_data;
-        int id = pdev->id % ARRAY_SIZE(pdata->ldo);
+        int id;
         struct wm831x_ldo *ldo;
         struct resource *res;
         int ret, irq;
 
+        if (pdata && pdata->wm831x_num)
+                id = (pdata->wm831x_num * 10) + 1;
+        else
+                id = 0;
+        id = pdev->id - id;
+
         dev_dbg(&pdev->dev, "Probing LDO%d\n", id + 1);
 
         if (pdata == NULL || pdata->ldo[id] == NULL)
@@ -764,11 +776,18 @@ static __devinit int wm831x_alive_ldo_probe(struct platform_device *pdev)
 {
         struct wm831x *wm831x = dev_get_drvdata(pdev->dev.parent);
         struct wm831x_pdata *pdata = wm831x->dev->platform_data;
-        int id = pdev->id % ARRAY_SIZE(pdata->ldo);
+        int id;
         struct wm831x_ldo *ldo;
         struct resource *res;
         int ret;
 
+        if (pdata && pdata->wm831x_num)
+                id = (pdata->wm831x_num * 10) + 1;
+        else
+                id = 0;
+        id = pdev->id - id;
+
+
         dev_dbg(&pdev->dev, "Probing LDO%d\n", id + 1);
 
         if (pdata == NULL || pdata->ldo[id] == NULL)