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854 lines
22 KiB
854 lines
22 KiB
// SPDX-License-Identifier: GPL-2.0+ |
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// |
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// wm831x-dcdc.c -- DC-DC buck converter driver for the WM831x series |
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// |
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// Copyright 2009 Wolfson Microelectronics PLC. |
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// |
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// Author: Mark Brown <[email protected]> |
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#include <linux/module.h> |
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#include <linux/moduleparam.h> |
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#include <linux/init.h> |
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#include <linux/bitops.h> |
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#include <linux/err.h> |
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#include <linux/i2c.h> |
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#include <linux/platform_device.h> |
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#include <linux/regulator/driver.h> |
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#include <linux/regulator/machine.h> |
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#include <linux/gpio/consumer.h> |
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#include <linux/slab.h> |
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#include <linux/mfd/wm831x/core.h> |
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#include <linux/mfd/wm831x/regulator.h> |
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#include <linux/mfd/wm831x/pdata.h> |
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#define WM831X_BUCKV_MAX_SELECTOR 0x68 |
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#define WM831X_BUCKP_MAX_SELECTOR 0x66 |
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#define WM831X_DCDC_MODE_FAST 0 |
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#define WM831X_DCDC_MODE_NORMAL 1 |
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#define WM831X_DCDC_MODE_IDLE 2 |
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#define WM831X_DCDC_MODE_STANDBY 3 |
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#define WM831X_DCDC_MAX_NAME 9 |
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/* Register offsets in control block */ |
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#define WM831X_DCDC_CONTROL_1 0 |
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#define WM831X_DCDC_CONTROL_2 1 |
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#define WM831X_DCDC_ON_CONFIG 2 |
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#define WM831X_DCDC_SLEEP_CONTROL 3 |
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#define WM831X_DCDC_DVS_CONTROL 4 |
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/* |
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* Shared |
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*/ |
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struct wm831x_dcdc { |
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char name[WM831X_DCDC_MAX_NAME]; |
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char supply_name[WM831X_DCDC_MAX_NAME]; |
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struct regulator_desc desc; |
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int base; |
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struct wm831x *wm831x; |
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struct regulator_dev *regulator; |
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struct gpio_desc *dvs_gpiod; |
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int dvs_gpio_state; |
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int on_vsel; |
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int dvs_vsel; |
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}; |
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static unsigned int wm831x_dcdc_get_mode(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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u16 reg = dcdc->base + WM831X_DCDC_ON_CONFIG; |
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int val; |
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val = wm831x_reg_read(wm831x, reg); |
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if (val < 0) |
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return val; |
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val = (val & WM831X_DC1_ON_MODE_MASK) >> WM831X_DC1_ON_MODE_SHIFT; |
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switch (val) { |
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case WM831X_DCDC_MODE_FAST: |
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return REGULATOR_MODE_FAST; |
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case WM831X_DCDC_MODE_NORMAL: |
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return REGULATOR_MODE_NORMAL; |
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case WM831X_DCDC_MODE_STANDBY: |
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return REGULATOR_MODE_STANDBY; |
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case WM831X_DCDC_MODE_IDLE: |
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return REGULATOR_MODE_IDLE; |
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default: |
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BUG(); |
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return -EINVAL; |
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} |
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} |
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static int wm831x_dcdc_set_mode_int(struct wm831x *wm831x, int reg, |
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unsigned int mode) |
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{ |
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int val; |
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switch (mode) { |
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case REGULATOR_MODE_FAST: |
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val = WM831X_DCDC_MODE_FAST; |
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break; |
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case REGULATOR_MODE_NORMAL: |
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val = WM831X_DCDC_MODE_NORMAL; |
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break; |
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case REGULATOR_MODE_STANDBY: |
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val = WM831X_DCDC_MODE_STANDBY; |
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break; |
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case REGULATOR_MODE_IDLE: |
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val = WM831X_DCDC_MODE_IDLE; |
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break; |
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default: |
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return -EINVAL; |
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} |
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return wm831x_set_bits(wm831x, reg, WM831X_DC1_ON_MODE_MASK, |
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val << WM831X_DC1_ON_MODE_SHIFT); |
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} |
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static int wm831x_dcdc_set_mode(struct regulator_dev *rdev, unsigned int mode) |
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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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u16 reg = dcdc->base + WM831X_DCDC_ON_CONFIG; |
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return wm831x_dcdc_set_mode_int(wm831x, reg, mode); |
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} |
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static int wm831x_dcdc_set_suspend_mode(struct regulator_dev *rdev, |
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unsigned int mode) |
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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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u16 reg = dcdc->base + WM831X_DCDC_SLEEP_CONTROL; |
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return wm831x_dcdc_set_mode_int(wm831x, reg, mode); |
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} |
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static int wm831x_dcdc_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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/* DCDC1 and DCDC2 can additionally detect high voltage/current */ |
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if (rdev_get_id(rdev) < 2) { |
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if (ret & (WM831X_DC1_OV_STS << rdev_get_id(rdev))) { |
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dev_dbg(wm831x->dev, "DCDC%d over 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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if (ret & (WM831X_DC1_HC_STS << rdev_get_id(rdev))) { |
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dev_dbg(wm831x->dev, "DCDC%d over current\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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} |
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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_OFF; |
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/* TODO: When we handle hardware control modes so we can report the |
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* current mode. */ |
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return REGULATOR_STATUS_ON; |
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} |
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static irqreturn_t wm831x_dcdc_uv_irq(int irq, void *data) |
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{ |
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struct wm831x_dcdc *dcdc = data; |
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regulator_notifier_call_chain(dcdc->regulator, |
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REGULATOR_EVENT_UNDER_VOLTAGE, |
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NULL); |
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return IRQ_HANDLED; |
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} |
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static irqreturn_t wm831x_dcdc_oc_irq(int irq, void *data) |
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{ |
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struct wm831x_dcdc *dcdc = data; |
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regulator_notifier_call_chain(dcdc->regulator, |
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REGULATOR_EVENT_OVER_CURRENT, |
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NULL); |
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return IRQ_HANDLED; |
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} |
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/* |
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* BUCKV specifics |
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*/ |
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static const struct linear_range wm831x_buckv_ranges[] = { |
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REGULATOR_LINEAR_RANGE(600000, 0, 0x7, 0), |
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REGULATOR_LINEAR_RANGE(600000, 0x8, 0x68, 12500), |
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}; |
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static int wm831x_buckv_set_dvs(struct regulator_dev *rdev, int state) |
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{ |
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struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev); |
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if (state == dcdc->dvs_gpio_state) |
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return 0; |
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dcdc->dvs_gpio_state = state; |
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gpiod_set_value(dcdc->dvs_gpiod, state); |
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/* Should wait for DVS state change to be asserted if we have |
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* a GPIO for it, for now assume the device is configured |
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* for the fastest possible transition. |
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*/ |
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return 0; |
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} |
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static int wm831x_buckv_set_voltage_sel(struct regulator_dev *rdev, |
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unsigned vsel) |
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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 on_reg = dcdc->base + WM831X_DCDC_ON_CONFIG; |
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int dvs_reg = dcdc->base + WM831X_DCDC_DVS_CONTROL; |
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int ret; |
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/* If this value is already set then do a GPIO update if we can */ |
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if (dcdc->dvs_gpiod && dcdc->on_vsel == vsel) |
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return wm831x_buckv_set_dvs(rdev, 0); |
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if (dcdc->dvs_gpiod && dcdc->dvs_vsel == vsel) |
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return wm831x_buckv_set_dvs(rdev, 1); |
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/* Always set the ON status to the minimum voltage */ |
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ret = wm831x_set_bits(wm831x, on_reg, WM831X_DC1_ON_VSEL_MASK, vsel); |
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if (ret < 0) |
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return ret; |
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dcdc->on_vsel = vsel; |
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if (!dcdc->dvs_gpiod) |
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return ret; |
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/* Kick the voltage transition now */ |
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ret = wm831x_buckv_set_dvs(rdev, 0); |
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if (ret < 0) |
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return ret; |
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/* |
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* If this VSEL is higher than the last one we've seen then |
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* remember it as the DVS VSEL. This is optimised for CPUfreq |
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* usage where we want to get to the highest voltage very |
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* quickly. |
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*/ |
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if (vsel > dcdc->dvs_vsel) { |
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ret = wm831x_set_bits(wm831x, dvs_reg, |
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WM831X_DC1_DVS_VSEL_MASK, |
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vsel); |
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if (ret == 0) |
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dcdc->dvs_vsel = vsel; |
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else |
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dev_warn(wm831x->dev, |
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"Failed to set DCDC DVS VSEL: %d\n", ret); |
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} |
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return 0; |
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} |
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static int wm831x_buckv_set_suspend_voltage(struct regulator_dev *rdev, |
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int uV) |
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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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u16 reg = dcdc->base + WM831X_DCDC_SLEEP_CONTROL; |
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int vsel; |
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vsel = regulator_map_voltage_linear_range(rdev, uV, uV); |
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if (vsel < 0) |
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return vsel; |
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return wm831x_set_bits(wm831x, reg, WM831X_DC1_SLP_VSEL_MASK, vsel); |
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} |
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static int wm831x_buckv_get_voltage_sel(struct regulator_dev *rdev) |
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{ |
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struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev); |
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if (dcdc->dvs_gpiod && dcdc->dvs_gpio_state) |
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return dcdc->dvs_vsel; |
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else |
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return dcdc->on_vsel; |
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} |
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/* Current limit options */ |
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static const unsigned int wm831x_dcdc_ilim[] = { |
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125000, 250000, 375000, 500000, 625000, 750000, 875000, 1000000 |
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}; |
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static const struct regulator_ops wm831x_buckv_ops = { |
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.set_voltage_sel = wm831x_buckv_set_voltage_sel, |
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.get_voltage_sel = wm831x_buckv_get_voltage_sel, |
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.list_voltage = regulator_list_voltage_linear_range, |
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.map_voltage = regulator_map_voltage_linear_range, |
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.set_suspend_voltage = wm831x_buckv_set_suspend_voltage, |
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.set_current_limit = regulator_set_current_limit_regmap, |
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.get_current_limit = regulator_get_current_limit_regmap, |
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.is_enabled = regulator_is_enabled_regmap, |
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.enable = regulator_enable_regmap, |
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.disable = regulator_disable_regmap, |
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.get_status = wm831x_dcdc_get_status, |
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.get_mode = wm831x_dcdc_get_mode, |
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.set_mode = wm831x_dcdc_set_mode, |
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.set_suspend_mode = wm831x_dcdc_set_suspend_mode, |
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}; |
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/* |
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* Set up DVS control. We just log errors since we can still run |
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* (with reduced performance) if we fail. |
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*/ |
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static void wm831x_buckv_dvs_init(struct platform_device *pdev, |
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struct wm831x_dcdc *dcdc, |
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struct wm831x_buckv_pdata *pdata) |
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{ |
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struct wm831x *wm831x = dcdc->wm831x; |
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int ret; |
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u16 ctrl; |
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if (!pdata) |
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return; |
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/* gpiolib won't let us read the GPIO status so pick the higher |
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* of the two existing voltages so we take it as platform data. |
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*/ |
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dcdc->dvs_gpio_state = pdata->dvs_init_state; |
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dcdc->dvs_gpiod = devm_gpiod_get(&pdev->dev, "dvs", |
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dcdc->dvs_gpio_state ? GPIOD_OUT_HIGH : GPIOD_OUT_LOW); |
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if (IS_ERR(dcdc->dvs_gpiod)) { |
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dev_err(wm831x->dev, "Failed to get %s DVS GPIO: %ld\n", |
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dcdc->name, PTR_ERR(dcdc->dvs_gpiod)); |
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return; |
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} |
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switch (pdata->dvs_control_src) { |
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case 1: |
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ctrl = 2 << WM831X_DC1_DVS_SRC_SHIFT; |
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break; |
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case 2: |
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ctrl = 3 << WM831X_DC1_DVS_SRC_SHIFT; |
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break; |
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default: |
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dev_err(wm831x->dev, "Invalid DVS control source %d for %s\n", |
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pdata->dvs_control_src, dcdc->name); |
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return; |
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} |
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/* If DVS_VSEL is set to the minimum value then raise it to ON_VSEL |
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* to make bootstrapping a bit smoother. |
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*/ |
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if (!dcdc->dvs_vsel) { |
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ret = wm831x_set_bits(wm831x, |
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dcdc->base + WM831X_DCDC_DVS_CONTROL, |
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WM831X_DC1_DVS_VSEL_MASK, dcdc->on_vsel); |
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if (ret == 0) |
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dcdc->dvs_vsel = dcdc->on_vsel; |
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else |
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dev_warn(wm831x->dev, "Failed to set DVS_VSEL: %d\n", |
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ret); |
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} |
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ret = wm831x_set_bits(wm831x, dcdc->base + WM831X_DCDC_DVS_CONTROL, |
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WM831X_DC1_DVS_SRC_MASK, ctrl); |
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if (ret < 0) { |
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dev_err(wm831x->dev, "Failed to set %s DVS source: %d\n", |
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dcdc->name, ret); |
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} |
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} |
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static int wm831x_buckv_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 = dev_get_platdata(wm831x->dev); |
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struct regulator_config config = { }; |
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int id; |
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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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if (pdata && pdata->wm831x_num) |
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id = (pdata->wm831x_num * 10) + 1; |
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else |
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id = 0; |
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id = pdev->id - id; |
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dev_dbg(&pdev->dev, "Probing DCDC%d\n", id + 1); |
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dcdc = devm_kzalloc(&pdev->dev, sizeof(struct wm831x_dcdc), |
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GFP_KERNEL); |
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if (!dcdc) |
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return -ENOMEM; |
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dcdc->wm831x = wm831x; |
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res = platform_get_resource(pdev, IORESOURCE_REG, 0); |
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if (res == NULL) { |
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dev_err(&pdev->dev, "No REG 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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snprintf(dcdc->supply_name, sizeof(dcdc->supply_name), |
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"DC%dVDD", id + 1); |
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dcdc->desc.supply_name = dcdc->supply_name; |
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dcdc->desc.id = id; |
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dcdc->desc.type = REGULATOR_VOLTAGE; |
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dcdc->desc.n_voltages = WM831X_BUCKV_MAX_SELECTOR + 1; |
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dcdc->desc.linear_ranges = wm831x_buckv_ranges; |
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dcdc->desc.n_linear_ranges = ARRAY_SIZE(wm831x_buckv_ranges); |
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dcdc->desc.ops = &wm831x_buckv_ops; |
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dcdc->desc.owner = THIS_MODULE; |
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dcdc->desc.enable_reg = WM831X_DCDC_ENABLE; |
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dcdc->desc.enable_mask = 1 << id; |
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dcdc->desc.csel_reg = dcdc->base + WM831X_DCDC_CONTROL_2; |
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dcdc->desc.csel_mask = WM831X_DC1_HC_THR_MASK; |
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dcdc->desc.n_current_limits = ARRAY_SIZE(wm831x_dcdc_ilim); |
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dcdc->desc.curr_table = wm831x_dcdc_ilim; |
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ret = wm831x_reg_read(wm831x, dcdc->base + WM831X_DCDC_ON_CONFIG); |
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if (ret < 0) { |
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dev_err(wm831x->dev, "Failed to read ON VSEL: %d\n", ret); |
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goto err; |
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} |
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dcdc->on_vsel = ret & WM831X_DC1_ON_VSEL_MASK; |
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ret = wm831x_reg_read(wm831x, dcdc->base + WM831X_DCDC_DVS_CONTROL); |
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if (ret < 0) { |
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dev_err(wm831x->dev, "Failed to read DVS VSEL: %d\n", ret); |
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goto err; |
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} |
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dcdc->dvs_vsel = ret & WM831X_DC1_DVS_VSEL_MASK; |
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|
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if (pdata && pdata->dcdc[id]) |
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wm831x_buckv_dvs_init(pdev, dcdc, |
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pdata->dcdc[id]->driver_data); |
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|
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config.dev = pdev->dev.parent; |
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if (pdata) |
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config.init_data = pdata->dcdc[id]; |
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config.driver_data = dcdc; |
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config.regmap = wm831x->regmap; |
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dcdc->regulator = devm_regulator_register(&pdev->dev, &dcdc->desc, |
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&config); |
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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 = wm831x_irq(wm831x, platform_get_irq_byname(pdev, "UV")); |
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ret = devm_request_threaded_irq(&pdev->dev, irq, NULL, |
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wm831x_dcdc_uv_irq, |
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IRQF_TRIGGER_RISING | IRQF_ONESHOT, |
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dcdc->name, 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; |
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} |
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irq = wm831x_irq(wm831x, platform_get_irq_byname(pdev, "HC")); |
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ret = devm_request_threaded_irq(&pdev->dev, irq, NULL, |
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wm831x_dcdc_oc_irq, |
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IRQF_TRIGGER_RISING | IRQF_ONESHOT, |
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dcdc->name, dcdc); |
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if (ret != 0) { |
|
dev_err(&pdev->dev, "Failed to request HC IRQ %d: %d\n", |
|
irq, ret); |
|
goto err; |
|
} |
|
|
|
platform_set_drvdata(pdev, dcdc); |
|
|
|
return 0; |
|
|
|
err: |
|
return ret; |
|
} |
|
|
|
static struct platform_driver wm831x_buckv_driver = { |
|
.probe = wm831x_buckv_probe, |
|
.driver = { |
|
.name = "wm831x-buckv", |
|
}, |
|
}; |
|
|
|
/* |
|
* BUCKP specifics |
|
*/ |
|
|
|
static int wm831x_buckp_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 sel; |
|
|
|
sel = regulator_map_voltage_linear(rdev, uV, uV); |
|
if (sel < 0) |
|
return sel; |
|
|
|
return wm831x_set_bits(wm831x, reg, WM831X_DC3_ON_VSEL_MASK, sel); |
|
} |
|
|
|
static const struct regulator_ops wm831x_buckp_ops = { |
|
.set_voltage_sel = regulator_set_voltage_sel_regmap, |
|
.get_voltage_sel = regulator_get_voltage_sel_regmap, |
|
.list_voltage = regulator_list_voltage_linear, |
|
.map_voltage = regulator_map_voltage_linear, |
|
.set_suspend_voltage = wm831x_buckp_set_suspend_voltage, |
|
|
|
.is_enabled = regulator_is_enabled_regmap, |
|
.enable = regulator_enable_regmap, |
|
.disable = regulator_disable_regmap, |
|
.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 int wm831x_buckp_probe(struct platform_device *pdev) |
|
{ |
|
struct wm831x *wm831x = dev_get_drvdata(pdev->dev.parent); |
|
struct wm831x_pdata *pdata = dev_get_platdata(wm831x->dev); |
|
struct regulator_config config = { }; |
|
int id; |
|
struct wm831x_dcdc *dcdc; |
|
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 DCDC%d\n", id + 1); |
|
|
|
dcdc = devm_kzalloc(&pdev->dev, sizeof(struct wm831x_dcdc), |
|
GFP_KERNEL); |
|
if (!dcdc) |
|
return -ENOMEM; |
|
|
|
dcdc->wm831x = wm831x; |
|
|
|
res = platform_get_resource(pdev, IORESOURCE_REG, 0); |
|
if (res == NULL) { |
|
dev_err(&pdev->dev, "No REG 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; |
|
|
|
snprintf(dcdc->supply_name, sizeof(dcdc->supply_name), |
|
"DC%dVDD", id + 1); |
|
dcdc->desc.supply_name = dcdc->supply_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->desc.vsel_reg = dcdc->base + WM831X_DCDC_ON_CONFIG; |
|
dcdc->desc.vsel_mask = WM831X_DC3_ON_VSEL_MASK; |
|
dcdc->desc.enable_reg = WM831X_DCDC_ENABLE; |
|
dcdc->desc.enable_mask = 1 << id; |
|
dcdc->desc.min_uV = 850000; |
|
dcdc->desc.uV_step = 25000; |
|
|
|
config.dev = pdev->dev.parent; |
|
if (pdata) |
|
config.init_data = pdata->dcdc[id]; |
|
config.driver_data = dcdc; |
|
config.regmap = wm831x->regmap; |
|
|
|
dcdc->regulator = devm_regulator_register(&pdev->dev, &dcdc->desc, |
|
&config); |
|
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 = wm831x_irq(wm831x, platform_get_irq_byname(pdev, "UV")); |
|
ret = devm_request_threaded_irq(&pdev->dev, irq, NULL, |
|
wm831x_dcdc_uv_irq, |
|
IRQF_TRIGGER_RISING | IRQF_ONESHOT, |
|
dcdc->name, dcdc); |
|
if (ret != 0) { |
|
dev_err(&pdev->dev, "Failed to request UV IRQ %d: %d\n", |
|
irq, ret); |
|
goto err; |
|
} |
|
|
|
platform_set_drvdata(pdev, dcdc); |
|
|
|
return 0; |
|
|
|
err: |
|
return ret; |
|
} |
|
|
|
static struct platform_driver wm831x_buckp_driver = { |
|
.probe = wm831x_buckp_probe, |
|
.driver = { |
|
.name = "wm831x-buckp", |
|
}, |
|
}; |
|
|
|
/* |
|
* 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 const struct regulator_ops wm831x_boostp_ops = { |
|
.get_status = wm831x_boostp_get_status, |
|
|
|
.is_enabled = regulator_is_enabled_regmap, |
|
.enable = regulator_enable_regmap, |
|
.disable = regulator_disable_regmap, |
|
}; |
|
|
|
static int wm831x_boostp_probe(struct platform_device *pdev) |
|
{ |
|
struct wm831x *wm831x = dev_get_drvdata(pdev->dev.parent); |
|
struct wm831x_pdata *pdata = dev_get_platdata(wm831x->dev); |
|
struct regulator_config config = { }; |
|
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 = devm_kzalloc(&pdev->dev, sizeof(struct wm831x_dcdc), GFP_KERNEL); |
|
if (!dcdc) |
|
return -ENOMEM; |
|
|
|
dcdc->wm831x = wm831x; |
|
|
|
res = platform_get_resource(pdev, IORESOURCE_REG, 0); |
|
if (res == NULL) { |
|
dev_err(&pdev->dev, "No REG resource\n"); |
|
return -EINVAL; |
|
} |
|
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->desc.enable_reg = WM831X_DCDC_ENABLE; |
|
dcdc->desc.enable_mask = 1 << id; |
|
|
|
config.dev = pdev->dev.parent; |
|
if (pdata) |
|
config.init_data = pdata->dcdc[id]; |
|
config.driver_data = dcdc; |
|
config.regmap = wm831x->regmap; |
|
|
|
dcdc->regulator = devm_regulator_register(&pdev->dev, &dcdc->desc, |
|
&config); |
|
if (IS_ERR(dcdc->regulator)) { |
|
ret = PTR_ERR(dcdc->regulator); |
|
dev_err(wm831x->dev, "Failed to register DCDC%d: %d\n", |
|
id + 1, ret); |
|
return ret; |
|
} |
|
|
|
irq = wm831x_irq(wm831x, platform_get_irq_byname(pdev, "UV")); |
|
ret = devm_request_threaded_irq(&pdev->dev, irq, NULL, |
|
wm831x_dcdc_uv_irq, |
|
IRQF_TRIGGER_RISING | IRQF_ONESHOT, |
|
dcdc->name, |
|
dcdc); |
|
if (ret != 0) { |
|
dev_err(&pdev->dev, "Failed to request UV IRQ %d: %d\n", |
|
irq, ret); |
|
return ret; |
|
} |
|
|
|
platform_set_drvdata(pdev, dcdc); |
|
|
|
return 0; |
|
} |
|
|
|
static struct platform_driver wm831x_boostp_driver = { |
|
.probe = wm831x_boostp_probe, |
|
.driver = { |
|
.name = "wm831x-boostp", |
|
}, |
|
}; |
|
|
|
/* |
|
* External Power Enable |
|
* |
|
* These aren't actually DCDCs but look like them in hardware so share |
|
* code. |
|
*/ |
|
|
|
#define WM831X_EPE_BASE 6 |
|
|
|
static const struct regulator_ops wm831x_epe_ops = { |
|
.is_enabled = regulator_is_enabled_regmap, |
|
.enable = regulator_enable_regmap, |
|
.disable = regulator_disable_regmap, |
|
.get_status = wm831x_dcdc_get_status, |
|
}; |
|
|
|
static int wm831x_epe_probe(struct platform_device *pdev) |
|
{ |
|
struct wm831x *wm831x = dev_get_drvdata(pdev->dev.parent); |
|
struct wm831x_pdata *pdata = dev_get_platdata(wm831x->dev); |
|
struct regulator_config config = { }; |
|
int id = pdev->id % ARRAY_SIZE(pdata->epe); |
|
struct wm831x_dcdc *dcdc; |
|
int ret; |
|
|
|
dev_dbg(&pdev->dev, "Probing EPE%d\n", id + 1); |
|
|
|
dcdc = devm_kzalloc(&pdev->dev, sizeof(struct wm831x_dcdc), GFP_KERNEL); |
|
if (!dcdc) |
|
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->desc.enable_reg = WM831X_DCDC_ENABLE; |
|
dcdc->desc.enable_mask = 1 << dcdc->desc.id; |
|
|
|
config.dev = pdev->dev.parent; |
|
if (pdata) |
|
config.init_data = pdata->epe[id]; |
|
config.driver_data = dcdc; |
|
config.regmap = wm831x->regmap; |
|
|
|
dcdc->regulator = devm_regulator_register(&pdev->dev, &dcdc->desc, |
|
&config); |
|
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: |
|
return ret; |
|
} |
|
|
|
static struct platform_driver wm831x_epe_driver = { |
|
.probe = wm831x_epe_probe, |
|
.driver = { |
|
.name = "wm831x-epe", |
|
}, |
|
}; |
|
|
|
static struct platform_driver * const drivers[] = { |
|
&wm831x_buckv_driver, |
|
&wm831x_buckp_driver, |
|
&wm831x_boostp_driver, |
|
&wm831x_epe_driver, |
|
}; |
|
|
|
static int __init wm831x_dcdc_init(void) |
|
{ |
|
return platform_register_drivers(drivers, ARRAY_SIZE(drivers)); |
|
} |
|
subsys_initcall(wm831x_dcdc_init); |
|
|
|
static void __exit wm831x_dcdc_exit(void) |
|
{ |
|
platform_unregister_drivers(drivers, ARRAY_SIZE(drivers)); |
|
} |
|
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"); |
|
MODULE_ALIAS("platform:wm831x-boostp"); |
|
MODULE_ALIAS("platform:wm831x-epe");
|
|
|