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-rw-r--r--drivers/regulator/wm831x-dcdc.c88
1 files changed, 88 insertions, 0 deletions
diff --git a/drivers/regulator/wm831x-dcdc.c b/drivers/regulator/wm831x-dcdc.c
index fa5126e38ac..88a7dbac750 100644
--- a/drivers/regulator/wm831x-dcdc.c
+++ b/drivers/regulator/wm831x-dcdc.c
@@ -613,6 +613,89 @@ static struct platform_driver wm831x_buckp_driver = {
},
};
+/*
+ * External Power Enable
+ *
+ * These aren't actually DCDCs but look like them in hardware so share
+ * code.
+ */
+
+#define WM831X_EPE_BASE 6
+
+static struct regulator_ops wm831x_epe_ops = {
+ .is_enabled = wm831x_dcdc_is_enabled,
+ .enable = wm831x_dcdc_enable,
+ .disable = wm831x_dcdc_disable,
+ .get_status = wm831x_dcdc_get_status,
+};
+
+static __devinit int wm831x_epe_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->epe);
+ struct wm831x_dcdc *dcdc;
+ int ret;
+
+ dev_dbg(&pdev->dev, "Probing EPE%d\n", id + 1);
+
+ if (pdata == NULL || pdata->epe[id] == NULL)
+ return -ENODEV;
+
+ dcdc = kzalloc(sizeof(struct wm831x_dcdc), GFP_KERNEL);
+ if (dcdc == NULL) {
+ dev_err(&pdev->dev, "Unable to allocate private data\n");
+ return -ENOMEM;
+ }
+
+ dcdc->wm831x = wm831x;
+
+ /* For current parts this is correct; probably need to revisit
+ * in future.
+ */
+ snprintf(dcdc->name, sizeof(dcdc->name), "EPE%d", id + 1);
+ dcdc->desc.name = dcdc->name;
+ dcdc->desc.id = id + WM831X_EPE_BASE; /* Offset in DCDC registers */
+ dcdc->desc.ops = &wm831x_epe_ops;
+ dcdc->desc.type = REGULATOR_VOLTAGE;
+ dcdc->desc.owner = THIS_MODULE;
+
+ dcdc->regulator = regulator_register(&dcdc->desc, &pdev->dev,
+ pdata->epe[id], dcdc);
+ if (IS_ERR(dcdc->regulator)) {
+ ret = PTR_ERR(dcdc->regulator);
+ dev_err(wm831x->dev, "Failed to register EPE%d: %d\n",
+ id + 1, ret);
+ goto err;
+ }
+
+ platform_set_drvdata(pdev, dcdc);
+
+ return 0;
+
+err:
+ kfree(dcdc);
+ return ret;
+}
+
+static __devexit int wm831x_epe_remove(struct platform_device *pdev)
+{
+ struct wm831x_dcdc *dcdc = platform_get_drvdata(pdev);
+
+ regulator_unregister(dcdc->regulator);
+ kfree(dcdc);
+
+ return 0;
+}
+
+static struct platform_driver wm831x_epe_driver = {
+ .probe = wm831x_epe_probe,
+ .remove = __devexit_p(wm831x_epe_remove),
+ .driver = {
+ .name = "wm831x-epe",
+ },
+};
+
static int __init wm831x_dcdc_init(void)
{
int ret;
@@ -624,12 +707,17 @@ static int __init wm831x_dcdc_init(void)
if (ret != 0)
pr_err("Failed to register WM831x BUCKP driver: %d\n", ret);
+ ret = platform_driver_register(&wm831x_epe_driver);
+ if (ret != 0)
+ pr_err("Failed to register WM831x EPE driver: %d\n", ret);
+
return 0;
}
subsys_initcall(wm831x_dcdc_init);
static void __exit wm831x_dcdc_exit(void)
{
+ platform_driver_unregister(&wm831x_epe_driver);
platform_driver_unregister(&wm831x_buckp_driver);
platform_driver_unregister(&wm831x_buckv_driver);
}