| /* |
| * wm831x-dcdc.c -- DC-DC buck convertor driver for the WM831x series |
| * |
| * Copyright 2009 Wolfson Microelectronics PLC. |
| * |
| * Author: Mark Brown <broonie@opensource.wolfsonmicro.com> |
| * |
| * This program is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License as published by the |
| * Free Software Foundation; either version 2 of the License, or (at your |
| * option) any later version. |
| */ |
| |
| #include <linux/module.h> |
| #include <linux/moduleparam.h> |
| #include <linux/init.h> |
| #include <linux/bitops.h> |
| #include <linux/err.h> |
| #include <linux/i2c.h> |
| #include <linux/platform_device.h> |
| #include <linux/regulator/driver.h> |
| #include <linux/regulator/machine.h> |
| #include <linux/gpio.h> |
| #include <linux/slab.h> |
| |
| #include <linux/mfd/wm831x/core.h> |
| #include <linux/mfd/wm831x/regulator.h> |
| #include <linux/mfd/wm831x/pdata.h> |
| |
| #define WM831X_BUCKV_MAX_SELECTOR 0x68 |
| #define WM831X_BUCKP_MAX_SELECTOR 0x66 |
| |
| #define WM831X_DCDC_MODE_FAST 0 |
| #define WM831X_DCDC_MODE_NORMAL 1 |
| #define WM831X_DCDC_MODE_IDLE 2 |
| #define WM831X_DCDC_MODE_STANDBY 3 |
| |
| #define WM831X_DCDC_MAX_NAME 6 |
| |
| /* Register offsets in control block */ |
| #define WM831X_DCDC_CONTROL_1 0 |
| #define WM831X_DCDC_CONTROL_2 1 |
| #define WM831X_DCDC_ON_CONFIG 2 |
| #define WM831X_DCDC_SLEEP_CONTROL 3 |
| #define WM831X_DCDC_DVS_CONTROL 4 |
| |
| /* |
| * Shared |
| */ |
| |
| struct wm831x_dcdc { |
| char name[WM831X_DCDC_MAX_NAME]; |
| struct regulator_desc desc; |
| int base; |
| struct wm831x *wm831x; |
| struct regulator_dev *regulator; |
| int dvs_gpio; |
| int dvs_gpio_state; |
| int on_vsel; |
| int dvs_vsel; |
| }; |
| |
| static int wm831x_dcdc_is_enabled(struct regulator_dev *rdev) |
| { |
| struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev); |
| struct wm831x *wm831x = dcdc->wm831x; |
| int mask = 1 << rdev_get_id(rdev); |
| int reg; |
| |
| reg = wm831x_reg_read(wm831x, WM831X_DCDC_ENABLE); |
| if (reg < 0) |
| return reg; |
| |
| if (reg & mask) |
| return 1; |
| else |
| return 0; |
| } |
| |
| static int wm831x_dcdc_enable(struct regulator_dev *rdev) |
| { |
| struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev); |
| struct wm831x *wm831x = dcdc->wm831x; |
| int mask = 1 << rdev_get_id(rdev); |
| |
| return wm831x_set_bits(wm831x, WM831X_DCDC_ENABLE, mask, mask); |
| } |
| |
| static int wm831x_dcdc_disable(struct regulator_dev *rdev) |
| { |
| struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev); |
| struct wm831x *wm831x = dcdc->wm831x; |
| int mask = 1 << rdev_get_id(rdev); |
| |
| return wm831x_set_bits(wm831x, WM831X_DCDC_ENABLE, mask, 0); |
| } |
| |
| static unsigned int wm831x_dcdc_get_mode(struct regulator_dev *rdev) |
| |
| { |
| struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev); |
| struct wm831x *wm831x = dcdc->wm831x; |
| u16 reg = dcdc->base + WM831X_DCDC_ON_CONFIG; |
| int val; |
| |
| val = wm831x_reg_read(wm831x, reg); |
| if (val < 0) |
| return val; |
| |
| val = (val & WM831X_DC1_ON_MODE_MASK) >> WM831X_DC1_ON_MODE_SHIFT; |
| |
| switch (val) { |
| case WM831X_DCDC_MODE_FAST: |
| return REGULATOR_MODE_FAST; |
| case WM831X_DCDC_MODE_NORMAL: |
| return REGULATOR_MODE_NORMAL; |
| case WM831X_DCDC_MODE_STANDBY: |
| return REGULATOR_MODE_STANDBY; |
| case WM831X_DCDC_MODE_IDLE: |
| return REGULATOR_MODE_IDLE; |
| default: |
| BUG(); |
| return -EINVAL; |
| } |
| } |
| |
| static int wm831x_dcdc_set_mode_int(struct wm831x *wm831x, int reg, |
| unsigned int mode) |
| { |
| int val; |
| |
| switch (mode) { |
| case REGULATOR_MODE_FAST: |
| val = WM831X_DCDC_MODE_FAST; |
| break; |
| case REGULATOR_MODE_NORMAL: |
| val = WM831X_DCDC_MODE_NORMAL; |
| break; |
| case REGULATOR_MODE_STANDBY: |
| val = WM831X_DCDC_MODE_STANDBY; |
| break; |
| case REGULATOR_MODE_IDLE: |
| val = WM831X_DCDC_MODE_IDLE; |
| break; |
| default: |
| return -EINVAL; |
| } |
| |
| return wm831x_set_bits(wm831x, reg, WM831X_DC1_ON_MODE_MASK, |
| val << WM831X_DC1_ON_MODE_SHIFT); |
| } |
| |
| static int wm831x_dcdc_set_mode(struct regulator_dev *rdev, unsigned int mode) |
| { |
| struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev); |
| struct wm831x *wm831x = dcdc->wm831x; |
| u16 reg = dcdc->base + WM831X_DCDC_ON_CONFIG; |
| |
| return wm831x_dcdc_set_mode_int(wm831x, reg, mode); |
| } |
| |
| static int wm831x_dcdc_set_suspend_mode(struct regulator_dev *rdev, |
| unsigned int mode) |
| { |
| struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev); |
| struct wm831x *wm831x = dcdc->wm831x; |
| u16 reg = dcdc->base + WM831X_DCDC_SLEEP_CONTROL; |
| |
| return wm831x_dcdc_set_mode_int(wm831x, reg, mode); |
| } |
| |
| static int wm831x_dcdc_get_status(struct regulator_dev *rdev) |
| { |
| struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev); |
| struct wm831x *wm831x = dcdc->wm831x; |
| int ret; |
| |
| /* First, check for errors */ |
| ret = wm831x_reg_read(wm831x, WM831X_DCDC_UV_STATUS); |
| if (ret < 0) |
| return ret; |
| |
| if (ret & (1 << rdev_get_id(rdev))) { |
| dev_dbg(wm831x->dev, "DCDC%d under voltage\n", |
| rdev_get_id(rdev) + 1); |
| return REGULATOR_STATUS_ERROR; |
| } |
| |
| /* DCDC1 and DCDC2 can additionally detect high voltage/current */ |
| if (rdev_get_id(rdev) < 2) { |
| if (ret & (WM831X_DC1_OV_STS << rdev_get_id(rdev))) { |
| dev_dbg(wm831x->dev, "DCDC%d over voltage\n", |
| rdev_get_id(rdev) + 1); |
| return REGULATOR_STATUS_ERROR; |
| } |
| |
| if (ret & (WM831X_DC1_HC_STS << rdev_get_id(rdev))) { |
| dev_dbg(wm831x->dev, "DCDC%d over current\n", |
| rdev_get_id(rdev) + 1); |
| return REGULATOR_STATUS_ERROR; |
| } |
| } |
| |
| /* Is the regulator on? */ |
| ret = wm831x_reg_read(wm831x, WM831X_DCDC_STATUS); |
| if (ret < 0) |
| return ret; |
| if (!(ret & (1 << rdev_get_id(rdev)))) |
| return REGULATOR_STATUS_OFF; |
| |
| /* TODO: When we handle hardware control modes so we can report the |
| * current mode. */ |
| return REGULATOR_STATUS_ON; |
| } |
| |
| static irqreturn_t wm831x_dcdc_uv_irq(int irq, void *data) |
| { |
| struct wm831x_dcdc *dcdc = data; |
| |
| regulator_notifier_call_chain(dcdc->regulator, |
| REGULATOR_EVENT_UNDER_VOLTAGE, |
| NULL); |
| |
| return IRQ_HANDLED; |
| } |
| |
| static irqreturn_t wm831x_dcdc_oc_irq(int irq, void *data) |
| { |
| struct wm831x_dcdc *dcdc = data; |
| |
| regulator_notifier_call_chain(dcdc->regulator, |
| REGULATOR_EVENT_OVER_CURRENT, |
| NULL); |
| |
| return IRQ_HANDLED; |
| } |
| |
| /* |
| * BUCKV specifics |
| */ |
| |
| static int wm831x_buckv_list_voltage(struct regulator_dev *rdev, |
| unsigned selector) |
| { |
| if (selector <= 0x8) |
| return 600000; |
| if (selector <= WM831X_BUCKV_MAX_SELECTOR) |
| return 600000 + ((selector - 0x8) * 12500); |
| return -EINVAL; |
| } |
| |
| static int wm831x_buckv_select_min_voltage(struct regulator_dev *rdev, |
| int min_uV, int max_uV) |
| { |
| u16 vsel; |
| |
| if (min_uV < 600000) |
| vsel = 0; |
| else if (min_uV <= 1800000) |
| vsel = ((min_uV - 600000) / 12500) + 8; |
| else |
| return -EINVAL; |
| |
| if (wm831x_buckv_list_voltage(rdev, vsel) > max_uV) |
| return -EINVAL; |
| |
| return vsel; |
| } |
| |
| static int wm831x_buckv_select_max_voltage(struct regulator_dev *rdev, |
| int min_uV, int max_uV) |
| { |
| u16 vsel; |
| |
| if (max_uV < 600000 || max_uV > 1800000) |
| return -EINVAL; |
| |
| vsel = ((max_uV - 600000) / 12500) + 8; |
| |
| if (wm831x_buckv_list_voltage(rdev, vsel) < min_uV || |
| wm831x_buckv_list_voltage(rdev, vsel) < max_uV) |
| return -EINVAL; |
| |
| return vsel; |
| } |
| |
| static int wm831x_buckv_set_dvs(struct regulator_dev *rdev, int state) |
| { |
| struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev); |
| |
| if (state == dcdc->dvs_gpio_state) |
| return 0; |
| |
| dcdc->dvs_gpio_state = state; |
| gpio_set_value(dcdc->dvs_gpio, state); |
| |
| /* Should wait for DVS state change to be asserted if we have |
| * a GPIO for it, for now assume the device is configured |
| * for the fastest possible transition. |
| */ |
| |
| return 0; |
| } |
| |
| static int wm831x_buckv_set_voltage(struct regulator_dev *rdev, |
| int min_uV, int max_uV, unsigned *selector) |
| { |
| struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev); |
| struct wm831x *wm831x = dcdc->wm831x; |
| int on_reg = dcdc->base + WM831X_DCDC_ON_CONFIG; |
| int dvs_reg = dcdc->base + WM831X_DCDC_DVS_CONTROL; |
| int vsel, ret; |
| |
| vsel = wm831x_buckv_select_min_voltage(rdev, min_uV, max_uV); |
| if (vsel < 0) |
| return vsel; |
| |
| *selector = vsel; |
| |
| /* If this value is already set then do a GPIO update if we can */ |
| if (dcdc->dvs_gpio && dcdc->on_vsel == vsel) |
| return wm831x_buckv_set_dvs(rdev, 0); |
| |
| if (dcdc->dvs_gpio && dcdc->dvs_vsel == vsel) |
| return wm831x_buckv_set_dvs(rdev, 1); |
| |
| /* Always set the ON status to the minimum voltage */ |
| ret = wm831x_set_bits(wm831x, on_reg, WM831X_DC1_ON_VSEL_MASK, vsel); |
| if (ret < 0) |
| return ret; |
| dcdc->on_vsel = vsel; |
| |
| if (!dcdc->dvs_gpio) |
| return ret; |
| |
| /* Kick the voltage transition now */ |
| ret = wm831x_buckv_set_dvs(rdev, 0); |
| if (ret < 0) |
| return ret; |
| |
| /* Set the high voltage as the DVS voltage. This is optimised |
| * for CPUfreq usage, most processors will keep the maximum |
| * voltage constant and lower the minimum with the frequency. */ |
| vsel = wm831x_buckv_select_max_voltage(rdev, min_uV, max_uV); |
| if (vsel < 0) { |
| /* This should never happen - at worst the same vsel |
| * should be chosen */ |
| WARN_ON(vsel < 0); |
| return 0; |
| } |
| |
| /* Don't bother if it's the same VSEL we're already using */ |
| if (vsel == dcdc->on_vsel) |
| return 0; |
| |
| ret = wm831x_set_bits(wm831x, dvs_reg, WM831X_DC1_DVS_VSEL_MASK, vsel); |
| if (ret == 0) |
| dcdc->dvs_vsel = vsel; |
| else |
| dev_warn(wm831x->dev, "Failed to set DCDC DVS VSEL: %d\n", |
| ret); |
| |
| return 0; |
| } |
| |
| static int wm831x_buckv_set_suspend_voltage(struct regulator_dev *rdev, |
| int uV) |
| { |
| struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev); |
| struct wm831x *wm831x = dcdc->wm831x; |
| u16 reg = dcdc->base + WM831X_DCDC_SLEEP_CONTROL; |
| int vsel; |
| |
| vsel = wm831x_buckv_select_min_voltage(rdev, uV, uV); |
| if (vsel < 0) |
| return vsel; |
| |
| return wm831x_set_bits(wm831x, reg, WM831X_DC1_SLP_VSEL_MASK, vsel); |
| } |
| |
| static int wm831x_buckv_get_voltage_sel(struct regulator_dev *rdev) |
| { |
| struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev); |
| |
| if (dcdc->dvs_gpio && dcdc->dvs_gpio_state) |
| return dcdc->dvs_vsel; |
| else |
| return dcdc->on_vsel; |
| } |
| |
| /* Current limit options */ |
| static u16 wm831x_dcdc_ilim[] = { |
| 125, 250, 375, 500, 625, 750, 875, 1000 |
| }; |
| |
| static int wm831x_buckv_set_current_limit(struct regulator_dev *rdev, |
| int min_uA, int max_uA) |
| { |
| struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev); |
| struct wm831x *wm831x = dcdc->wm831x; |
| u16 reg = dcdc->base + WM831X_DCDC_CONTROL_2; |
| int i; |
| |
| for (i = 0; i < ARRAY_SIZE(wm831x_dcdc_ilim); i++) { |
| if (max_uA <= wm831x_dcdc_ilim[i]) |
| break; |
| } |
| if (i == ARRAY_SIZE(wm831x_dcdc_ilim)) |
| return -EINVAL; |
| |
| return wm831x_set_bits(wm831x, reg, WM831X_DC1_HC_THR_MASK, i); |
| } |
| |
| static int wm831x_buckv_get_current_limit(struct regulator_dev *rdev) |
| { |
| struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev); |
| struct wm831x *wm831x = dcdc->wm831x; |
| u16 reg = dcdc->base + WM831X_DCDC_CONTROL_2; |
| int val; |
| |
| val = wm831x_reg_read(wm831x, reg); |
| if (val < 0) |
| return val; |
| |
| return wm831x_dcdc_ilim[val & WM831X_DC1_HC_THR_MASK]; |
| } |
| |
| static struct regulator_ops wm831x_buckv_ops = { |
| .set_voltage = wm831x_buckv_set_voltage, |
| .get_voltage_sel = wm831x_buckv_get_voltage_sel, |
| .list_voltage = wm831x_buckv_list_voltage, |
| .set_suspend_voltage = wm831x_buckv_set_suspend_voltage, |
| .set_current_limit = wm831x_buckv_set_current_limit, |
| .get_current_limit = wm831x_buckv_get_current_limit, |
| |
| .is_enabled = wm831x_dcdc_is_enabled, |
| .enable = wm831x_dcdc_enable, |
| .disable = wm831x_dcdc_disable, |
| .get_status = wm831x_dcdc_get_status, |
| .get_mode = wm831x_dcdc_get_mode, |
| .set_mode = wm831x_dcdc_set_mode, |
| .set_suspend_mode = wm831x_dcdc_set_suspend_mode, |
| }; |
| |
| /* |
| * Set up DVS control. We just log errors since we can still run |
| * (with reduced performance) if we fail. |
| */ |
| static __devinit void wm831x_buckv_dvs_init(struct wm831x_dcdc *dcdc, |
| struct wm831x_buckv_pdata *pdata) |
| { |
| struct wm831x *wm831x = dcdc->wm831x; |
| int ret; |
| u16 ctrl; |
| |
| if (!pdata || !pdata->dvs_gpio) |
| return; |
| |
| switch (pdata->dvs_control_src) { |
| case 1: |
| ctrl = 2 << WM831X_DC1_DVS_SRC_SHIFT; |
| break; |
| case 2: |
| ctrl = 3 << WM831X_DC1_DVS_SRC_SHIFT; |
| break; |
| default: |
| dev_err(wm831x->dev, "Invalid DVS control source %d for %s\n", |
| pdata->dvs_control_src, dcdc->name); |
| return; |
| } |
| |
| ret = wm831x_set_bits(wm831x, dcdc->base + WM831X_DCDC_DVS_CONTROL, |
| WM831X_DC1_DVS_SRC_MASK, ctrl); |
| if (ret < 0) { |
| dev_err(wm831x->dev, "Failed to set %s DVS source: %d\n", |
| dcdc->name, ret); |
| return; |
| } |
| |
| ret = gpio_request(pdata->dvs_gpio, "DCDC DVS"); |
| if (ret < 0) { |
| dev_err(wm831x->dev, "Failed to get %s DVS GPIO: %d\n", |
| dcdc->name, ret); |
| return; |
| } |
| |
| /* gpiolib won't let us read the GPIO status so pick the higher |
| * of the two existing voltages so we take it as platform data. |
| */ |
| dcdc->dvs_gpio_state = pdata->dvs_init_state; |
| |
| ret = gpio_direction_output(pdata->dvs_gpio, dcdc->dvs_gpio_state); |
| if (ret < 0) { |
| dev_err(wm831x->dev, "Failed to enable %s DVS GPIO: %d\n", |
| dcdc->name, ret); |
| gpio_free(pdata->dvs_gpio); |
| return; |
| } |
| |
| dcdc->dvs_gpio = pdata->dvs_gpio; |
| } |
| |
| static __devinit int wm831x_buckv_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->dcdc); |
| struct wm831x_dcdc *dcdc; |
| struct resource *res; |
| int ret, irq; |
| |
| dev_dbg(&pdev->dev, "Probing DCDC%d\n", id + 1); |
| |
| if (pdata == NULL || pdata->dcdc[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; |
| |
| res = platform_get_resource(pdev, IORESOURCE_IO, 0); |
| if (res == NULL) { |
| dev_err(&pdev->dev, "No I/O resource\n"); |
| ret = -EINVAL; |
| goto err; |
| } |
| dcdc->base = res->start; |
| |
| snprintf(dcdc->name, sizeof(dcdc->name), "DCDC%d", id + 1); |
| dcdc->desc.name = dcdc->name; |
| dcdc->desc.id = id; |
| dcdc->desc.type = REGULATOR_VOLTAGE; |
| dcdc->desc.n_voltages = WM831X_BUCKV_MAX_SELECTOR + 1; |
| dcdc->desc.ops = &wm831x_buckv_ops; |
| dcdc->desc.owner = THIS_MODULE; |
| |
| ret = wm831x_reg_read(wm831x, dcdc->base + WM831X_DCDC_ON_CONFIG); |
| if (ret < 0) { |
| dev_err(wm831x->dev, "Failed to read ON VSEL: %d\n", ret); |
| goto err; |
| } |
| dcdc->on_vsel = ret & WM831X_DC1_ON_VSEL_MASK; |
| |
| ret = wm831x_reg_read(wm831x, dcdc->base + WM831X_DCDC_ON_CONFIG); |
| if (ret < 0) { |
| dev_err(wm831x->dev, "Failed to read DVS VSEL: %d\n", ret); |
| goto err; |
| } |
| dcdc->dvs_vsel = ret & WM831X_DC1_DVS_VSEL_MASK; |
| |
| if (pdata->dcdc[id]) |
| wm831x_buckv_dvs_init(dcdc, pdata->dcdc[id]->driver_data); |
| |
| dcdc->regulator = regulator_register(&dcdc->desc, &pdev->dev, |
| pdata->dcdc[id], dcdc); |
| if (IS_ERR(dcdc->regulator)) { |
| ret = PTR_ERR(dcdc->regulator); |
| dev_err(wm831x->dev, "Failed to register DCDC%d: %d\n", |
| id + 1, ret); |
| goto err; |
| } |
| |
| irq = platform_get_irq_byname(pdev, "UV"); |
| ret = request_threaded_irq(irq, NULL, wm831x_dcdc_uv_irq, |
| IRQF_TRIGGER_RISING, dcdc->name, dcdc); |
| if (ret != 0) { |
| dev_err(&pdev->dev, "Failed to request UV IRQ %d: %d\n", |
| irq, ret); |
| goto err_regulator; |
| } |
| |
| irq = platform_get_irq_byname(pdev, "HC"); |
| ret = request_threaded_irq(irq, NULL, wm831x_dcdc_oc_irq, |
| IRQF_TRIGGER_RISING, dcdc->name, dcdc); |
| if (ret != 0) { |
| dev_err(&pdev->dev, "Failed to request HC IRQ %d: %d\n", |
| irq, ret); |
| goto err_uv; |
| } |
| |
| platform_set_drvdata(pdev, dcdc); |
| |
| return 0; |
| |
| err_uv: |
| free_irq(platform_get_irq_byname(pdev, "UV"), dcdc); |
| err_regulator: |
| regulator_unregister(dcdc->regulator); |
| err: |
| if (dcdc->dvs_gpio) |
| gpio_free(dcdc->dvs_gpio); |
| kfree(dcdc); |
| return ret; |
| } |
| |
| static __devexit int wm831x_buckv_remove(struct platform_device *pdev) |
| { |
| struct wm831x_dcdc *dcdc = platform_get_drvdata(pdev); |
| |
| platform_set_drvdata(pdev, NULL); |
| |
| free_irq(platform_get_irq_byname(pdev, "HC"), dcdc); |
| free_irq(platform_get_irq_byname(pdev, "UV"), dcdc); |
| regulator_unregister(dcdc->regulator); |
| if (dcdc->dvs_gpio) |
| gpio_free(dcdc->dvs_gpio); |
| kfree(dcdc); |
| |
| return 0; |
| } |
| |
| static struct platform_driver wm831x_buckv_driver = { |
| .probe = wm831x_buckv_probe, |
| .remove = __devexit_p(wm831x_buckv_remove), |
| .driver = { |
| .name = "wm831x-buckv", |
| .owner = THIS_MODULE, |
| }, |
| }; |
| |
| /* |
| * BUCKP specifics |
| */ |
| |
| static int wm831x_buckp_list_voltage(struct regulator_dev *rdev, |
| unsigned selector) |
| { |
| if (selector <= WM831X_BUCKP_MAX_SELECTOR) |
| return 850000 + (selector * 25000); |
| else |
| return -EINVAL; |
| } |
| |
| static int wm831x_buckp_set_voltage_int(struct regulator_dev *rdev, int reg, |
| int min_uV, int max_uV, int *selector) |
| { |
| struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev); |
| struct wm831x *wm831x = dcdc->wm831x; |
| u16 vsel; |
| |
| if (min_uV <= 34000000) |
| vsel = (min_uV - 850000) / 25000; |
| else |
| return -EINVAL; |
| |
| if (wm831x_buckp_list_voltage(rdev, vsel) > max_uV) |
| return -EINVAL; |
| |
| *selector = vsel; |
| |
| return wm831x_set_bits(wm831x, reg, WM831X_DC3_ON_VSEL_MASK, vsel); |
| } |
| |
| static int wm831x_buckp_set_voltage(struct regulator_dev *rdev, |
| int min_uV, int max_uV, |
| unsigned *selector) |
| { |
| struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev); |
| u16 reg = dcdc->base + WM831X_DCDC_ON_CONFIG; |
| |
| return wm831x_buckp_set_voltage_int(rdev, reg, min_uV, max_uV, |
| selector); |
| } |
| |
| static int wm831x_buckp_set_suspend_voltage(struct regulator_dev *rdev, |
| int uV) |
| { |
| struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev); |
| u16 reg = dcdc->base + WM831X_DCDC_SLEEP_CONTROL; |
| unsigned selector; |
| |
| return wm831x_buckp_set_voltage_int(rdev, reg, uV, uV, &selector); |
| } |
| |
| static int wm831x_buckp_get_voltage_sel(struct regulator_dev *rdev) |
| { |
| struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev); |
| struct wm831x *wm831x = dcdc->wm831x; |
| u16 reg = dcdc->base + WM831X_DCDC_ON_CONFIG; |
| int val; |
| |
| val = wm831x_reg_read(wm831x, reg); |
| if (val < 0) |
| return val; |
| |
| return val & WM831X_DC3_ON_VSEL_MASK; |
| } |
| |
| static struct regulator_ops wm831x_buckp_ops = { |
| .set_voltage = wm831x_buckp_set_voltage, |
| .get_voltage_sel = wm831x_buckp_get_voltage_sel, |
| .list_voltage = wm831x_buckp_list_voltage, |
| .set_suspend_voltage = wm831x_buckp_set_suspend_voltage, |
| |
| .is_enabled = wm831x_dcdc_is_enabled, |
| .enable = wm831x_dcdc_enable, |
| .disable = wm831x_dcdc_disable, |
| .get_status = wm831x_dcdc_get_status, |
| .get_mode = wm831x_dcdc_get_mode, |
| .set_mode = wm831x_dcdc_set_mode, |
| .set_suspend_mode = wm831x_dcdc_set_suspend_mode, |
| }; |
| |
| static __devinit int wm831x_buckp_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->dcdc); |
| struct wm831x_dcdc *dcdc; |
| struct resource *res; |
| int ret, irq; |
| |
| dev_dbg(&pdev->dev, "Probing DCDC%d\n", id + 1); |
| |
| if (pdata == NULL || pdata->dcdc[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; |
| |
| res = platform_get_resource(pdev, IORESOURCE_IO, 0); |
| if (res == NULL) { |
| dev_err(&pdev->dev, "No I/O resource\n"); |
| ret = -EINVAL; |
| goto err; |
| } |
| dcdc->base = res->start; |
| |
| snprintf(dcdc->name, sizeof(dcdc->name), "DCDC%d", id + 1); |
| dcdc->desc.name = dcdc->name; |
| dcdc->desc.id = id; |
| dcdc->desc.type = REGULATOR_VOLTAGE; |
| dcdc->desc.n_voltages = WM831X_BUCKP_MAX_SELECTOR + 1; |
| dcdc->desc.ops = &wm831x_buckp_ops; |
| dcdc->desc.owner = THIS_MODULE; |
| |
| dcdc->regulator = regulator_register(&dcdc->desc, &pdev->dev, |
| pdata->dcdc[id], dcdc); |
| if (IS_ERR(dcdc->regulator)) { |
| ret = PTR_ERR(dcdc->regulator); |
| dev_err(wm831x->dev, "Failed to register DCDC%d: %d\n", |
| id + 1, ret); |
| goto err; |
| } |
| |
| irq = platform_get_irq_byname(pdev, "UV"); |
| ret = request_threaded_irq(irq, NULL, wm831x_dcdc_uv_irq, |
| IRQF_TRIGGER_RISING, dcdc->name, dcdc); |
| if (ret != 0) { |
| dev_err(&pdev->dev, "Failed to request UV IRQ %d: %d\n", |
| irq, ret); |
| goto err_regulator; |
| } |
| |
| platform_set_drvdata(pdev, dcdc); |
| |
| return 0; |
| |
| err_regulator: |
| regulator_unregister(dcdc->regulator); |
| err: |
| kfree(dcdc); |
| return ret; |
| } |
| |
| static __devexit int wm831x_buckp_remove(struct platform_device *pdev) |
| { |
| struct wm831x_dcdc *dcdc = platform_get_drvdata(pdev); |
| |
| platform_set_drvdata(pdev, NULL); |
| |
| free_irq(platform_get_irq_byname(pdev, "UV"), dcdc); |
| regulator_unregister(dcdc->regulator); |
| kfree(dcdc); |
| |
| return 0; |
| } |
| |
| static struct platform_driver wm831x_buckp_driver = { |
| .probe = wm831x_buckp_probe, |
| .remove = __devexit_p(wm831x_buckp_remove), |
| .driver = { |
| .name = "wm831x-buckp", |
| .owner = THIS_MODULE, |
| }, |
| }; |
| |
| /* |
| * DCDC boost convertors |
| */ |
| |
| static int wm831x_boostp_get_status(struct regulator_dev *rdev) |
| { |
| struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev); |
| struct wm831x *wm831x = dcdc->wm831x; |
| int ret; |
| |
| /* First, check for errors */ |
| ret = wm831x_reg_read(wm831x, WM831X_DCDC_UV_STATUS); |
| if (ret < 0) |
| return ret; |
| |
| if (ret & (1 << rdev_get_id(rdev))) { |
| dev_dbg(wm831x->dev, "DCDC%d under voltage\n", |
| rdev_get_id(rdev) + 1); |
| return REGULATOR_STATUS_ERROR; |
| } |
| |
| /* Is the regulator on? */ |
| ret = wm831x_reg_read(wm831x, WM831X_DCDC_STATUS); |
| if (ret < 0) |
| return ret; |
| if (ret & (1 << rdev_get_id(rdev))) |
| return REGULATOR_STATUS_ON; |
| else |
| return REGULATOR_STATUS_OFF; |
| } |
| |
| static struct regulator_ops wm831x_boostp_ops = { |
| .get_status = wm831x_boostp_get_status, |
| |
| .is_enabled = wm831x_dcdc_is_enabled, |
| .enable = wm831x_dcdc_enable, |
| .disable = wm831x_dcdc_disable, |
| }; |
| |
| static __devinit int wm831x_boostp_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->dcdc); |
| struct wm831x_dcdc *dcdc; |
| struct resource *res; |
| int ret, irq; |
| |
| dev_dbg(&pdev->dev, "Probing DCDC%d\n", id + 1); |
| |
| if (pdata == NULL || pdata->dcdc[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; |
| |
| res = platform_get_resource(pdev, IORESOURCE_IO, 0); |
| if (res == NULL) { |
| dev_err(&pdev->dev, "No I/O resource\n"); |
| ret = -EINVAL; |
| goto err; |
| } |
| dcdc->base = res->start; |
| |
| snprintf(dcdc->name, sizeof(dcdc->name), "DCDC%d", id + 1); |
| dcdc->desc.name = dcdc->name; |
| dcdc->desc.id = id; |
| dcdc->desc.type = REGULATOR_VOLTAGE; |
| dcdc->desc.ops = &wm831x_boostp_ops; |
| dcdc->desc.owner = THIS_MODULE; |
| |
| dcdc->regulator = regulator_register(&dcdc->desc, &pdev->dev, |
| pdata->dcdc[id], dcdc); |
| if (IS_ERR(dcdc->regulator)) { |
| ret = PTR_ERR(dcdc->regulator); |
| dev_err(wm831x->dev, "Failed to register DCDC%d: %d\n", |
| id + 1, ret); |
| goto err; |
| } |
| |
| irq = platform_get_irq_byname(pdev, "UV"); |
| ret = request_threaded_irq(irq, NULL, wm831x_dcdc_uv_irq, |
| IRQF_TRIGGER_RISING, dcdc->name, |
| dcdc); |
| if (ret != 0) { |
| dev_err(&pdev->dev, "Failed to request UV IRQ %d: %d\n", |
| irq, ret); |
| goto err_regulator; |
| } |
| |
| platform_set_drvdata(pdev, dcdc); |
| |
| return 0; |
| |
| err_regulator: |
| regulator_unregister(dcdc->regulator); |
| err: |
| kfree(dcdc); |
| return ret; |
| } |
| |
| static __devexit int wm831x_boostp_remove(struct platform_device *pdev) |
| { |
| struct wm831x_dcdc *dcdc = platform_get_drvdata(pdev); |
| |
| platform_set_drvdata(pdev, NULL); |
| |
| free_irq(platform_get_irq_byname(pdev, "UV"), dcdc); |
| regulator_unregister(dcdc->regulator); |
| kfree(dcdc); |
| |
| return 0; |
| } |
| |
| static struct platform_driver wm831x_boostp_driver = { |
| .probe = wm831x_boostp_probe, |
| .remove = __devexit_p(wm831x_boostp_remove), |
| .driver = { |
| .name = "wm831x-boostp", |
| .owner = THIS_MODULE, |
| }, |
| }; |
| |
| /* |
| * 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); |
| |
| platform_set_drvdata(pdev, NULL); |
| |
| 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", |
| .owner = THIS_MODULE, |
| }, |
| }; |
| |
| static int __init wm831x_dcdc_init(void) |
| { |
| int ret; |
| ret = platform_driver_register(&wm831x_buckv_driver); |
| if (ret != 0) |
| pr_err("Failed to register WM831x BUCKV driver: %d\n", ret); |
| |
| ret = platform_driver_register(&wm831x_buckp_driver); |
| if (ret != 0) |
| pr_err("Failed to register WM831x BUCKP driver: %d\n", ret); |
| |
| ret = platform_driver_register(&wm831x_boostp_driver); |
| if (ret != 0) |
| pr_err("Failed to register WM831x BOOST 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_boostp_driver); |
| platform_driver_unregister(&wm831x_buckp_driver); |
| platform_driver_unregister(&wm831x_buckv_driver); |
| } |
| module_exit(wm831x_dcdc_exit); |
| |
| /* Module information */ |
| MODULE_AUTHOR("Mark Brown"); |
| MODULE_DESCRIPTION("WM831x DC-DC convertor driver"); |
| MODULE_LICENSE("GPL"); |
| MODULE_ALIAS("platform:wm831x-buckv"); |
| MODULE_ALIAS("platform:wm831x-buckp"); |
