regulator: Add WM831x DC-DC boost convertor support
The WM831x series of PMICs include a single DC-DC boost convertor. This adds basic support for this convertor. Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Acked-by: Liam Girdwood <lrg@slimlogic.co.uk> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
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1304850d4c
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@ -613,6 +613,132 @@ static struct platform_driver wm831x_buckp_driver = {
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},
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};
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/*
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* DCDC boost convertors
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*/
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static int wm831x_boostp_get_status(struct regulator_dev *rdev)
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{
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struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev);
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struct wm831x *wm831x = dcdc->wm831x;
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int ret;
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/* First, check for errors */
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ret = wm831x_reg_read(wm831x, WM831X_DCDC_UV_STATUS);
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if (ret < 0)
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return ret;
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if (ret & (1 << rdev_get_id(rdev))) {
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dev_dbg(wm831x->dev, "DCDC%d under voltage\n",
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rdev_get_id(rdev) + 1);
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return REGULATOR_STATUS_ERROR;
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}
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/* Is the regulator on? */
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ret = wm831x_reg_read(wm831x, WM831X_DCDC_STATUS);
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if (ret < 0)
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return ret;
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if (ret & (1 << rdev_get_id(rdev)))
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return REGULATOR_STATUS_ON;
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else
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return REGULATOR_STATUS_OFF;
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}
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static struct regulator_ops wm831x_boostp_ops = {
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.get_status = wm831x_boostp_get_status,
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.is_enabled = wm831x_dcdc_is_enabled,
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.enable = wm831x_dcdc_enable,
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.disable = wm831x_dcdc_disable,
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};
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static __devinit int wm831x_boostp_probe(struct platform_device *pdev)
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{
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struct wm831x *wm831x = dev_get_drvdata(pdev->dev.parent);
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struct wm831x_pdata *pdata = wm831x->dev->platform_data;
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int id = pdev->id % ARRAY_SIZE(pdata->dcdc);
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struct wm831x_dcdc *dcdc;
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struct resource *res;
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int ret, irq;
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dev_dbg(&pdev->dev, "Probing DCDC%d\n", id + 1);
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if (pdata == NULL || pdata->dcdc[id] == NULL)
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return -ENODEV;
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dcdc = kzalloc(sizeof(struct wm831x_dcdc), GFP_KERNEL);
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if (dcdc == NULL) {
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dev_err(&pdev->dev, "Unable to allocate private data\n");
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return -ENOMEM;
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}
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dcdc->wm831x = wm831x;
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res = platform_get_resource(pdev, IORESOURCE_IO, 0);
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if (res == NULL) {
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dev_err(&pdev->dev, "No I/O resource\n");
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ret = -EINVAL;
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goto err;
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}
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dcdc->base = res->start;
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snprintf(dcdc->name, sizeof(dcdc->name), "DCDC%d", id + 1);
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dcdc->desc.name = dcdc->name;
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dcdc->desc.id = id;
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dcdc->desc.type = REGULATOR_VOLTAGE;
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dcdc->desc.ops = &wm831x_boostp_ops;
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dcdc->desc.owner = THIS_MODULE;
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dcdc->regulator = regulator_register(&dcdc->desc, &pdev->dev,
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pdata->dcdc[id], dcdc);
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if (IS_ERR(dcdc->regulator)) {
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ret = PTR_ERR(dcdc->regulator);
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dev_err(wm831x->dev, "Failed to register DCDC%d: %d\n",
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id + 1, ret);
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goto err;
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}
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irq = platform_get_irq_byname(pdev, "UV");
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ret = wm831x_request_irq(wm831x, irq, wm831x_dcdc_uv_irq,
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IRQF_TRIGGER_RISING, dcdc->name,
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dcdc);
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if (ret != 0) {
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dev_err(&pdev->dev, "Failed to request UV IRQ %d: %d\n",
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irq, ret);
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goto err_regulator;
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}
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platform_set_drvdata(pdev, dcdc);
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return 0;
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err_regulator:
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regulator_unregister(dcdc->regulator);
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err:
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kfree(dcdc);
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return ret;
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}
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static __devexit int wm831x_boostp_remove(struct platform_device *pdev)
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{
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struct wm831x_dcdc *dcdc = platform_get_drvdata(pdev);
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struct wm831x *wm831x = dcdc->wm831x;
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wm831x_free_irq(wm831x, platform_get_irq_byname(pdev, "UV"), dcdc);
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regulator_unregister(dcdc->regulator);
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kfree(dcdc);
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return 0;
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}
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static struct platform_driver wm831x_boostp_driver = {
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.probe = wm831x_boostp_probe,
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.remove = __devexit_p(wm831x_boostp_remove),
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.driver = {
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.name = "wm831x-boostp",
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},
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};
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/*
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* External Power Enable
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*
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@ -707,6 +833,10 @@ static int __init wm831x_dcdc_init(void)
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if (ret != 0)
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pr_err("Failed to register WM831x BUCKP driver: %d\n", ret);
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ret = platform_driver_register(&wm831x_boostp_driver);
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if (ret != 0)
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pr_err("Failed to register WM831x BOOST driver: %d\n", ret);
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ret = platform_driver_register(&wm831x_epe_driver);
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if (ret != 0)
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pr_err("Failed to register WM831x EPE driver: %d\n", ret);
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@ -718,6 +848,7 @@ subsys_initcall(wm831x_dcdc_init);
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static void __exit wm831x_dcdc_exit(void)
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{
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platform_driver_unregister(&wm831x_epe_driver);
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platform_driver_unregister(&wm831x_boostp_driver);
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platform_driver_unregister(&wm831x_buckp_driver);
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platform_driver_unregister(&wm831x_buckv_driver);
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}
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