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741 lines
19 KiB
741 lines
19 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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/* |
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* PMU driver for Wolfson Microelectronics wm831x PMICs |
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* |
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* Copyright 2009 Wolfson Microelectronics PLC. |
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*/ |
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|
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#include <linux/module.h> |
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#include <linux/err.h> |
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#include <linux/platform_device.h> |
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#include <linux/power_supply.h> |
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#include <linux/slab.h> |
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#include <linux/usb/phy.h> |
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|
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#include <linux/mfd/wm831x/core.h> |
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#include <linux/mfd/wm831x/auxadc.h> |
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#include <linux/mfd/wm831x/pmu.h> |
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#include <linux/mfd/wm831x/pdata.h> |
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|
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struct wm831x_power { |
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struct wm831x *wm831x; |
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struct power_supply *wall; |
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struct power_supply *usb; |
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struct power_supply *battery; |
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struct power_supply_desc wall_desc; |
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struct power_supply_desc usb_desc; |
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struct power_supply_desc battery_desc; |
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char wall_name[20]; |
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char usb_name[20]; |
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char battery_name[20]; |
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bool have_battery; |
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struct usb_phy *usb_phy; |
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struct notifier_block usb_notify; |
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}; |
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static int wm831x_power_check_online(struct wm831x *wm831x, int supply, |
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union power_supply_propval *val) |
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{ |
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int ret; |
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|
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ret = wm831x_reg_read(wm831x, WM831X_SYSTEM_STATUS); |
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if (ret < 0) |
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return ret; |
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|
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if (ret & supply) |
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val->intval = 1; |
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else |
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val->intval = 0; |
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return 0; |
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} |
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static int wm831x_power_read_voltage(struct wm831x *wm831x, |
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enum wm831x_auxadc src, |
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union power_supply_propval *val) |
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{ |
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int ret; |
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|
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ret = wm831x_auxadc_read_uv(wm831x, src); |
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if (ret >= 0) |
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val->intval = ret; |
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return ret; |
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} |
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/********************************************************************* |
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* WALL Power |
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*********************************************************************/ |
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static int wm831x_wall_get_prop(struct power_supply *psy, |
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enum power_supply_property psp, |
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union power_supply_propval *val) |
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{ |
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struct wm831x_power *wm831x_power = dev_get_drvdata(psy->dev.parent); |
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struct wm831x *wm831x = wm831x_power->wm831x; |
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int ret = 0; |
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|
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switch (psp) { |
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case POWER_SUPPLY_PROP_ONLINE: |
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ret = wm831x_power_check_online(wm831x, WM831X_PWR_WALL, val); |
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break; |
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case POWER_SUPPLY_PROP_VOLTAGE_NOW: |
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ret = wm831x_power_read_voltage(wm831x, WM831X_AUX_WALL, val); |
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break; |
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default: |
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ret = -EINVAL; |
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break; |
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} |
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|
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return ret; |
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} |
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static enum power_supply_property wm831x_wall_props[] = { |
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POWER_SUPPLY_PROP_ONLINE, |
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POWER_SUPPLY_PROP_VOLTAGE_NOW, |
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}; |
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|
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/********************************************************************* |
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* USB Power |
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*********************************************************************/ |
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static int wm831x_usb_get_prop(struct power_supply *psy, |
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enum power_supply_property psp, |
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union power_supply_propval *val) |
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{ |
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struct wm831x_power *wm831x_power = dev_get_drvdata(psy->dev.parent); |
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struct wm831x *wm831x = wm831x_power->wm831x; |
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int ret = 0; |
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|
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switch (psp) { |
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case POWER_SUPPLY_PROP_ONLINE: |
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ret = wm831x_power_check_online(wm831x, WM831X_PWR_USB, val); |
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break; |
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case POWER_SUPPLY_PROP_VOLTAGE_NOW: |
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ret = wm831x_power_read_voltage(wm831x, WM831X_AUX_USB, val); |
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break; |
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default: |
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ret = -EINVAL; |
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break; |
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} |
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return ret; |
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} |
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|
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static enum power_supply_property wm831x_usb_props[] = { |
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POWER_SUPPLY_PROP_ONLINE, |
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POWER_SUPPLY_PROP_VOLTAGE_NOW, |
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}; |
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|
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/* In milliamps */ |
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static const unsigned int wm831x_usb_limits[] = { |
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0, |
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2, |
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100, |
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500, |
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900, |
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1500, |
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1800, |
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550, |
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}; |
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|
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static int wm831x_usb_limit_change(struct notifier_block *nb, |
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unsigned long limit, void *data) |
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{ |
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struct wm831x_power *wm831x_power = container_of(nb, |
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struct wm831x_power, |
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usb_notify); |
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unsigned int i, best; |
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|
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/* Find the highest supported limit */ |
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best = 0; |
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for (i = 0; i < ARRAY_SIZE(wm831x_usb_limits); i++) { |
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if (limit >= wm831x_usb_limits[i] && |
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wm831x_usb_limits[best] < wm831x_usb_limits[i]) |
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best = i; |
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} |
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dev_dbg(wm831x_power->wm831x->dev, |
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"Limiting USB current to %umA", wm831x_usb_limits[best]); |
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wm831x_set_bits(wm831x_power->wm831x, WM831X_POWER_STATE, |
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WM831X_USB_ILIM_MASK, best); |
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return 0; |
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} |
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|
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/********************************************************************* |
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* Battery properties |
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*********************************************************************/ |
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|
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struct chg_map { |
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int val; |
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int reg_val; |
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}; |
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|
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static struct chg_map trickle_ilims[] = { |
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{ 50, 0 << WM831X_CHG_TRKL_ILIM_SHIFT }, |
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{ 100, 1 << WM831X_CHG_TRKL_ILIM_SHIFT }, |
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{ 150, 2 << WM831X_CHG_TRKL_ILIM_SHIFT }, |
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{ 200, 3 << WM831X_CHG_TRKL_ILIM_SHIFT }, |
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}; |
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|
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static struct chg_map vsels[] = { |
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{ 4050, 0 << WM831X_CHG_VSEL_SHIFT }, |
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{ 4100, 1 << WM831X_CHG_VSEL_SHIFT }, |
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{ 4150, 2 << WM831X_CHG_VSEL_SHIFT }, |
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{ 4200, 3 << WM831X_CHG_VSEL_SHIFT }, |
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}; |
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|
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static struct chg_map fast_ilims[] = { |
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{ 0, 0 << WM831X_CHG_FAST_ILIM_SHIFT }, |
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{ 50, 1 << WM831X_CHG_FAST_ILIM_SHIFT }, |
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{ 100, 2 << WM831X_CHG_FAST_ILIM_SHIFT }, |
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{ 150, 3 << WM831X_CHG_FAST_ILIM_SHIFT }, |
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{ 200, 4 << WM831X_CHG_FAST_ILIM_SHIFT }, |
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{ 250, 5 << WM831X_CHG_FAST_ILIM_SHIFT }, |
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{ 300, 6 << WM831X_CHG_FAST_ILIM_SHIFT }, |
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{ 350, 7 << WM831X_CHG_FAST_ILIM_SHIFT }, |
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{ 400, 8 << WM831X_CHG_FAST_ILIM_SHIFT }, |
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{ 450, 9 << WM831X_CHG_FAST_ILIM_SHIFT }, |
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{ 500, 10 << WM831X_CHG_FAST_ILIM_SHIFT }, |
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{ 600, 11 << WM831X_CHG_FAST_ILIM_SHIFT }, |
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{ 700, 12 << WM831X_CHG_FAST_ILIM_SHIFT }, |
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{ 800, 13 << WM831X_CHG_FAST_ILIM_SHIFT }, |
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{ 900, 14 << WM831X_CHG_FAST_ILIM_SHIFT }, |
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{ 1000, 15 << WM831X_CHG_FAST_ILIM_SHIFT }, |
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}; |
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|
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static struct chg_map eoc_iterms[] = { |
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{ 20, 0 << WM831X_CHG_ITERM_SHIFT }, |
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{ 30, 1 << WM831X_CHG_ITERM_SHIFT }, |
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{ 40, 2 << WM831X_CHG_ITERM_SHIFT }, |
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{ 50, 3 << WM831X_CHG_ITERM_SHIFT }, |
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{ 60, 4 << WM831X_CHG_ITERM_SHIFT }, |
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{ 70, 5 << WM831X_CHG_ITERM_SHIFT }, |
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{ 80, 6 << WM831X_CHG_ITERM_SHIFT }, |
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{ 90, 7 << WM831X_CHG_ITERM_SHIFT }, |
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}; |
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|
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static struct chg_map chg_times[] = { |
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{ 60, 0 << WM831X_CHG_TIME_SHIFT }, |
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{ 90, 1 << WM831X_CHG_TIME_SHIFT }, |
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{ 120, 2 << WM831X_CHG_TIME_SHIFT }, |
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{ 150, 3 << WM831X_CHG_TIME_SHIFT }, |
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{ 180, 4 << WM831X_CHG_TIME_SHIFT }, |
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{ 210, 5 << WM831X_CHG_TIME_SHIFT }, |
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{ 240, 6 << WM831X_CHG_TIME_SHIFT }, |
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{ 270, 7 << WM831X_CHG_TIME_SHIFT }, |
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{ 300, 8 << WM831X_CHG_TIME_SHIFT }, |
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{ 330, 9 << WM831X_CHG_TIME_SHIFT }, |
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{ 360, 10 << WM831X_CHG_TIME_SHIFT }, |
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{ 390, 11 << WM831X_CHG_TIME_SHIFT }, |
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{ 420, 12 << WM831X_CHG_TIME_SHIFT }, |
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{ 450, 13 << WM831X_CHG_TIME_SHIFT }, |
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{ 480, 14 << WM831X_CHG_TIME_SHIFT }, |
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{ 510, 15 << WM831X_CHG_TIME_SHIFT }, |
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}; |
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|
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static void wm831x_battey_apply_config(struct wm831x *wm831x, |
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struct chg_map *map, int count, int val, |
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int *reg, const char *name, |
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const char *units) |
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{ |
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int i; |
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|
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for (i = 0; i < count; i++) |
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if (val == map[i].val) |
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break; |
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if (i == count) { |
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dev_err(wm831x->dev, "Invalid %s %d%s\n", |
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name, val, units); |
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} else { |
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*reg |= map[i].reg_val; |
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dev_dbg(wm831x->dev, "Set %s of %d%s\n", name, val, units); |
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} |
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} |
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|
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static void wm831x_config_battery(struct wm831x *wm831x) |
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{ |
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struct wm831x_pdata *wm831x_pdata = wm831x->dev->platform_data; |
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struct wm831x_battery_pdata *pdata; |
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int ret, reg1, reg2; |
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|
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if (!wm831x_pdata || !wm831x_pdata->battery) { |
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dev_warn(wm831x->dev, |
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"No battery charger configuration\n"); |
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return; |
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} |
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pdata = wm831x_pdata->battery; |
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reg1 = 0; |
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reg2 = 0; |
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if (!pdata->enable) { |
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dev_info(wm831x->dev, "Battery charger disabled\n"); |
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return; |
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} |
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reg1 |= WM831X_CHG_ENA; |
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if (pdata->off_mask) |
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reg2 |= WM831X_CHG_OFF_MSK; |
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if (pdata->fast_enable) |
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reg1 |= WM831X_CHG_FAST; |
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wm831x_battey_apply_config(wm831x, trickle_ilims, |
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ARRAY_SIZE(trickle_ilims), |
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pdata->trickle_ilim, ®2, |
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"trickle charge current limit", "mA"); |
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wm831x_battey_apply_config(wm831x, vsels, ARRAY_SIZE(vsels), |
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pdata->vsel, ®2, |
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"target voltage", "mV"); |
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wm831x_battey_apply_config(wm831x, fast_ilims, ARRAY_SIZE(fast_ilims), |
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pdata->fast_ilim, ®2, |
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"fast charge current limit", "mA"); |
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wm831x_battey_apply_config(wm831x, eoc_iterms, ARRAY_SIZE(eoc_iterms), |
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pdata->eoc_iterm, ®1, |
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"end of charge current threshold", "mA"); |
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wm831x_battey_apply_config(wm831x, chg_times, ARRAY_SIZE(chg_times), |
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pdata->timeout, ®2, |
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"charger timeout", "min"); |
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ret = wm831x_reg_unlock(wm831x); |
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if (ret != 0) { |
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dev_err(wm831x->dev, "Failed to unlock registers: %d\n", ret); |
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return; |
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} |
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ret = wm831x_set_bits(wm831x, WM831X_CHARGER_CONTROL_1, |
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WM831X_CHG_ENA_MASK | |
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WM831X_CHG_FAST_MASK | |
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WM831X_CHG_ITERM_MASK, |
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reg1); |
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if (ret != 0) |
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dev_err(wm831x->dev, "Failed to set charger control 1: %d\n", |
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ret); |
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|
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ret = wm831x_set_bits(wm831x, WM831X_CHARGER_CONTROL_2, |
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WM831X_CHG_OFF_MSK | |
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WM831X_CHG_TIME_MASK | |
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WM831X_CHG_FAST_ILIM_MASK | |
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WM831X_CHG_TRKL_ILIM_MASK | |
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WM831X_CHG_VSEL_MASK, |
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reg2); |
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if (ret != 0) |
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dev_err(wm831x->dev, "Failed to set charger control 2: %d\n", |
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ret); |
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|
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wm831x_reg_lock(wm831x); |
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} |
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static int wm831x_bat_check_status(struct wm831x *wm831x, int *status) |
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{ |
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int ret; |
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|
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ret = wm831x_reg_read(wm831x, WM831X_SYSTEM_STATUS); |
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if (ret < 0) |
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return ret; |
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|
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if (ret & WM831X_PWR_SRC_BATT) { |
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*status = POWER_SUPPLY_STATUS_DISCHARGING; |
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return 0; |
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} |
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ret = wm831x_reg_read(wm831x, WM831X_CHARGER_STATUS); |
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if (ret < 0) |
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return ret; |
|
|
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switch (ret & WM831X_CHG_STATE_MASK) { |
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case WM831X_CHG_STATE_OFF: |
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*status = POWER_SUPPLY_STATUS_NOT_CHARGING; |
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break; |
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case WM831X_CHG_STATE_TRICKLE: |
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case WM831X_CHG_STATE_FAST: |
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*status = POWER_SUPPLY_STATUS_CHARGING; |
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break; |
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|
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default: |
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*status = POWER_SUPPLY_STATUS_UNKNOWN; |
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break; |
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} |
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|
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return 0; |
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} |
|
|
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static int wm831x_bat_check_type(struct wm831x *wm831x, int *type) |
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{ |
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int ret; |
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|
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ret = wm831x_reg_read(wm831x, WM831X_CHARGER_STATUS); |
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if (ret < 0) |
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return ret; |
|
|
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switch (ret & WM831X_CHG_STATE_MASK) { |
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case WM831X_CHG_STATE_TRICKLE: |
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case WM831X_CHG_STATE_TRICKLE_OT: |
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*type = POWER_SUPPLY_CHARGE_TYPE_TRICKLE; |
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break; |
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case WM831X_CHG_STATE_FAST: |
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case WM831X_CHG_STATE_FAST_OT: |
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*type = POWER_SUPPLY_CHARGE_TYPE_FAST; |
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break; |
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default: |
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*type = POWER_SUPPLY_CHARGE_TYPE_NONE; |
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break; |
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} |
|
|
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return 0; |
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} |
|
|
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static int wm831x_bat_check_health(struct wm831x *wm831x, int *health) |
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{ |
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int ret; |
|
|
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ret = wm831x_reg_read(wm831x, WM831X_CHARGER_STATUS); |
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if (ret < 0) |
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return ret; |
|
|
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if (ret & WM831X_BATT_HOT_STS) { |
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*health = POWER_SUPPLY_HEALTH_OVERHEAT; |
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return 0; |
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} |
|
|
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if (ret & WM831X_BATT_COLD_STS) { |
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*health = POWER_SUPPLY_HEALTH_COLD; |
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return 0; |
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} |
|
|
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if (ret & WM831X_BATT_OV_STS) { |
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*health = POWER_SUPPLY_HEALTH_OVERVOLTAGE; |
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return 0; |
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} |
|
|
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switch (ret & WM831X_CHG_STATE_MASK) { |
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case WM831X_CHG_STATE_TRICKLE_OT: |
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case WM831X_CHG_STATE_FAST_OT: |
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*health = POWER_SUPPLY_HEALTH_OVERHEAT; |
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break; |
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case WM831X_CHG_STATE_DEFECTIVE: |
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*health = POWER_SUPPLY_HEALTH_UNSPEC_FAILURE; |
|
break; |
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default: |
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*health = POWER_SUPPLY_HEALTH_GOOD; |
|
break; |
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} |
|
|
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return 0; |
|
} |
|
|
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static int wm831x_bat_get_prop(struct power_supply *psy, |
|
enum power_supply_property psp, |
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union power_supply_propval *val) |
|
{ |
|
struct wm831x_power *wm831x_power = dev_get_drvdata(psy->dev.parent); |
|
struct wm831x *wm831x = wm831x_power->wm831x; |
|
int ret = 0; |
|
|
|
switch (psp) { |
|
case POWER_SUPPLY_PROP_STATUS: |
|
ret = wm831x_bat_check_status(wm831x, &val->intval); |
|
break; |
|
case POWER_SUPPLY_PROP_ONLINE: |
|
ret = wm831x_power_check_online(wm831x, WM831X_PWR_SRC_BATT, |
|
val); |
|
break; |
|
case POWER_SUPPLY_PROP_VOLTAGE_NOW: |
|
ret = wm831x_power_read_voltage(wm831x, WM831X_AUX_BATT, val); |
|
break; |
|
case POWER_SUPPLY_PROP_HEALTH: |
|
ret = wm831x_bat_check_health(wm831x, &val->intval); |
|
break; |
|
case POWER_SUPPLY_PROP_CHARGE_TYPE: |
|
ret = wm831x_bat_check_type(wm831x, &val->intval); |
|
break; |
|
default: |
|
ret = -EINVAL; |
|
break; |
|
} |
|
|
|
return ret; |
|
} |
|
|
|
static enum power_supply_property wm831x_bat_props[] = { |
|
POWER_SUPPLY_PROP_STATUS, |
|
POWER_SUPPLY_PROP_ONLINE, |
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POWER_SUPPLY_PROP_VOLTAGE_NOW, |
|
POWER_SUPPLY_PROP_HEALTH, |
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POWER_SUPPLY_PROP_CHARGE_TYPE, |
|
}; |
|
|
|
static const char *wm831x_bat_irqs[] = { |
|
"BATT HOT", |
|
"BATT COLD", |
|
"BATT FAIL", |
|
"OV", |
|
"END", |
|
"TO", |
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"MODE", |
|
"START", |
|
}; |
|
|
|
static irqreturn_t wm831x_bat_irq(int irq, void *data) |
|
{ |
|
struct wm831x_power *wm831x_power = data; |
|
struct wm831x *wm831x = wm831x_power->wm831x; |
|
|
|
dev_dbg(wm831x->dev, "Battery status changed: %d\n", irq); |
|
|
|
/* The battery charger is autonomous so we don't need to do |
|
* anything except kick user space */ |
|
if (wm831x_power->have_battery) |
|
power_supply_changed(wm831x_power->battery); |
|
|
|
return IRQ_HANDLED; |
|
} |
|
|
|
|
|
/********************************************************************* |
|
* Initialisation |
|
*********************************************************************/ |
|
|
|
static irqreturn_t wm831x_syslo_irq(int irq, void *data) |
|
{ |
|
struct wm831x_power *wm831x_power = data; |
|
struct wm831x *wm831x = wm831x_power->wm831x; |
|
|
|
/* Not much we can actually *do* but tell people for |
|
* posterity, we're probably about to run out of power. */ |
|
dev_crit(wm831x->dev, "SYSVDD under voltage\n"); |
|
|
|
return IRQ_HANDLED; |
|
} |
|
|
|
static irqreturn_t wm831x_pwr_src_irq(int irq, void *data) |
|
{ |
|
struct wm831x_power *wm831x_power = data; |
|
struct wm831x *wm831x = wm831x_power->wm831x; |
|
|
|
dev_dbg(wm831x->dev, "Power source changed\n"); |
|
|
|
/* Just notify for everything - little harm in overnotifying. */ |
|
if (wm831x_power->have_battery) |
|
power_supply_changed(wm831x_power->battery); |
|
power_supply_changed(wm831x_power->usb); |
|
power_supply_changed(wm831x_power->wall); |
|
|
|
return IRQ_HANDLED; |
|
} |
|
|
|
static int wm831x_power_probe(struct platform_device *pdev) |
|
{ |
|
struct wm831x *wm831x = dev_get_drvdata(pdev->dev.parent); |
|
struct wm831x_pdata *wm831x_pdata = wm831x->dev->platform_data; |
|
struct wm831x_power *power; |
|
int ret, irq, i; |
|
|
|
power = devm_kzalloc(&pdev->dev, sizeof(struct wm831x_power), |
|
GFP_KERNEL); |
|
if (power == NULL) |
|
return -ENOMEM; |
|
|
|
power->wm831x = wm831x; |
|
platform_set_drvdata(pdev, power); |
|
|
|
if (wm831x_pdata && wm831x_pdata->wm831x_num) { |
|
snprintf(power->wall_name, sizeof(power->wall_name), |
|
"wm831x-wall.%d", wm831x_pdata->wm831x_num); |
|
snprintf(power->battery_name, sizeof(power->wall_name), |
|
"wm831x-battery.%d", wm831x_pdata->wm831x_num); |
|
snprintf(power->usb_name, sizeof(power->wall_name), |
|
"wm831x-usb.%d", wm831x_pdata->wm831x_num); |
|
} else { |
|
snprintf(power->wall_name, sizeof(power->wall_name), |
|
"wm831x-wall"); |
|
snprintf(power->battery_name, sizeof(power->wall_name), |
|
"wm831x-battery"); |
|
snprintf(power->usb_name, sizeof(power->wall_name), |
|
"wm831x-usb"); |
|
} |
|
|
|
/* We ignore configuration failures since we can still read back |
|
* the status without enabling the charger. |
|
*/ |
|
wm831x_config_battery(wm831x); |
|
|
|
power->wall_desc.name = power->wall_name; |
|
power->wall_desc.type = POWER_SUPPLY_TYPE_MAINS; |
|
power->wall_desc.properties = wm831x_wall_props; |
|
power->wall_desc.num_properties = ARRAY_SIZE(wm831x_wall_props); |
|
power->wall_desc.get_property = wm831x_wall_get_prop; |
|
power->wall = power_supply_register(&pdev->dev, &power->wall_desc, |
|
NULL); |
|
if (IS_ERR(power->wall)) { |
|
ret = PTR_ERR(power->wall); |
|
goto err; |
|
} |
|
|
|
power->usb_desc.name = power->usb_name, |
|
power->usb_desc.type = POWER_SUPPLY_TYPE_USB; |
|
power->usb_desc.properties = wm831x_usb_props; |
|
power->usb_desc.num_properties = ARRAY_SIZE(wm831x_usb_props); |
|
power->usb_desc.get_property = wm831x_usb_get_prop; |
|
power->usb = power_supply_register(&pdev->dev, &power->usb_desc, NULL); |
|
if (IS_ERR(power->usb)) { |
|
ret = PTR_ERR(power->usb); |
|
goto err_wall; |
|
} |
|
|
|
ret = wm831x_reg_read(wm831x, WM831X_CHARGER_CONTROL_1); |
|
if (ret < 0) |
|
goto err_wall; |
|
power->have_battery = ret & WM831X_CHG_ENA; |
|
|
|
if (power->have_battery) { |
|
power->battery_desc.name = power->battery_name; |
|
power->battery_desc.properties = wm831x_bat_props; |
|
power->battery_desc.num_properties = ARRAY_SIZE(wm831x_bat_props); |
|
power->battery_desc.get_property = wm831x_bat_get_prop; |
|
power->battery_desc.use_for_apm = 1; |
|
power->battery = power_supply_register(&pdev->dev, |
|
&power->battery_desc, |
|
NULL); |
|
if (IS_ERR(power->battery)) { |
|
ret = PTR_ERR(power->battery); |
|
goto err_usb; |
|
} |
|
} |
|
|
|
irq = wm831x_irq(wm831x, platform_get_irq_byname(pdev, "SYSLO")); |
|
ret = request_threaded_irq(irq, NULL, wm831x_syslo_irq, |
|
IRQF_TRIGGER_RISING | IRQF_ONESHOT, "System power low", |
|
power); |
|
if (ret != 0) { |
|
dev_err(&pdev->dev, "Failed to request SYSLO IRQ %d: %d\n", |
|
irq, ret); |
|
goto err_battery; |
|
} |
|
|
|
irq = wm831x_irq(wm831x, platform_get_irq_byname(pdev, "PWR SRC")); |
|
ret = request_threaded_irq(irq, NULL, wm831x_pwr_src_irq, |
|
IRQF_TRIGGER_RISING | IRQF_ONESHOT, "Power source", |
|
power); |
|
if (ret != 0) { |
|
dev_err(&pdev->dev, "Failed to request PWR SRC IRQ %d: %d\n", |
|
irq, ret); |
|
goto err_syslo; |
|
} |
|
|
|
for (i = 0; i < ARRAY_SIZE(wm831x_bat_irqs); i++) { |
|
irq = wm831x_irq(wm831x, |
|
platform_get_irq_byname(pdev, |
|
wm831x_bat_irqs[i])); |
|
ret = request_threaded_irq(irq, NULL, wm831x_bat_irq, |
|
IRQF_TRIGGER_RISING | IRQF_ONESHOT, |
|
wm831x_bat_irqs[i], |
|
power); |
|
if (ret != 0) { |
|
dev_err(&pdev->dev, |
|
"Failed to request %s IRQ %d: %d\n", |
|
wm831x_bat_irqs[i], irq, ret); |
|
goto err_bat_irq; |
|
} |
|
} |
|
|
|
power->usb_phy = devm_usb_get_phy_by_phandle(&pdev->dev, "phys", 0); |
|
ret = PTR_ERR_OR_ZERO(power->usb_phy); |
|
|
|
switch (ret) { |
|
case 0: |
|
power->usb_notify.notifier_call = wm831x_usb_limit_change; |
|
ret = usb_register_notifier(power->usb_phy, &power->usb_notify); |
|
if (ret) { |
|
dev_err(&pdev->dev, "Failed to register notifier: %d\n", |
|
ret); |
|
goto err_bat_irq; |
|
} |
|
break; |
|
case -EINVAL: |
|
case -ENODEV: |
|
/* ignore missing usb-phy, it's optional */ |
|
power->usb_phy = NULL; |
|
ret = 0; |
|
break; |
|
default: |
|
dev_err(&pdev->dev, "Failed to find USB phy: %d\n", ret); |
|
fallthrough; |
|
case -EPROBE_DEFER: |
|
goto err_bat_irq; |
|
} |
|
|
|
return ret; |
|
|
|
err_bat_irq: |
|
--i; |
|
for (; i >= 0; i--) { |
|
irq = platform_get_irq_byname(pdev, wm831x_bat_irqs[i]); |
|
free_irq(irq, power); |
|
} |
|
irq = wm831x_irq(wm831x, platform_get_irq_byname(pdev, "PWR SRC")); |
|
free_irq(irq, power); |
|
err_syslo: |
|
irq = wm831x_irq(wm831x, platform_get_irq_byname(pdev, "SYSLO")); |
|
free_irq(irq, power); |
|
err_battery: |
|
if (power->have_battery) |
|
power_supply_unregister(power->battery); |
|
err_usb: |
|
power_supply_unregister(power->usb); |
|
err_wall: |
|
power_supply_unregister(power->wall); |
|
err: |
|
return ret; |
|
} |
|
|
|
static int wm831x_power_remove(struct platform_device *pdev) |
|
{ |
|
struct wm831x_power *wm831x_power = platform_get_drvdata(pdev); |
|
struct wm831x *wm831x = wm831x_power->wm831x; |
|
int irq, i; |
|
|
|
if (wm831x_power->usb_phy) { |
|
usb_unregister_notifier(wm831x_power->usb_phy, |
|
&wm831x_power->usb_notify); |
|
} |
|
|
|
for (i = 0; i < ARRAY_SIZE(wm831x_bat_irqs); i++) { |
|
irq = wm831x_irq(wm831x, |
|
platform_get_irq_byname(pdev, |
|
wm831x_bat_irqs[i])); |
|
free_irq(irq, wm831x_power); |
|
} |
|
|
|
irq = wm831x_irq(wm831x, platform_get_irq_byname(pdev, "PWR SRC")); |
|
free_irq(irq, wm831x_power); |
|
|
|
irq = wm831x_irq(wm831x, platform_get_irq_byname(pdev, "SYSLO")); |
|
free_irq(irq, wm831x_power); |
|
|
|
if (wm831x_power->have_battery) |
|
power_supply_unregister(wm831x_power->battery); |
|
power_supply_unregister(wm831x_power->wall); |
|
power_supply_unregister(wm831x_power->usb); |
|
return 0; |
|
} |
|
|
|
static struct platform_driver wm831x_power_driver = { |
|
.probe = wm831x_power_probe, |
|
.remove = wm831x_power_remove, |
|
.driver = { |
|
.name = "wm831x-power", |
|
}, |
|
}; |
|
|
|
module_platform_driver(wm831x_power_driver); |
|
|
|
MODULE_DESCRIPTION("Power supply driver for WM831x PMICs"); |
|
MODULE_AUTHOR("Mark Brown <[email protected]>"); |
|
MODULE_LICENSE("GPL"); |
|
MODULE_ALIAS("platform:wm831x-power");
|
|
|