mirror of
https://github.com/torvalds/linux
synced 2024-10-07 20:05:15 +00:00
dab68bbb54
The .remove() callback for a platform driver returns an int which makes many driver authors wrongly assume it's possible to do error handling by returning an error code. However the value returned is ignored (apart from emitting a warning) and this typically results in resource leaks. To improve here there is a quest to make the remove callback return void. In the first step of this quest all drivers are converted to .remove_new() which already returns void. Eventually after all drivers are converted, .remove_new() is renamed to .remove(). Trivially convert this driver from always returning zero in the remove callback to the void returning variant. Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Link: https://lore.kernel.org/r/20230918133700.1254499-31-u.kleine-koenig@pengutronix.de Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
741 lines
19 KiB
C
741 lines
19 KiB
C
// 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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#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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#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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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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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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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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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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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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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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* 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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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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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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/* 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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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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/* 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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* Battery properties
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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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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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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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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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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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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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static void wm831x_battery_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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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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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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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_battery_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_battery_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_battery_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_battery_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_battery_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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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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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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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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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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default:
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*status = POWER_SUPPLY_STATUS_UNKNOWN;
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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_type(struct wm831x *wm831x, int *type)
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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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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;
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break;
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default:
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*health = POWER_SUPPLY_HEALTH_GOOD;
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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_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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switch (psp) {
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case POWER_SUPPLY_PROP_STATUS:
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ret = wm831x_bat_check_status(wm831x, &val->intval);
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break;
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case POWER_SUPPLY_PROP_ONLINE:
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ret = wm831x_power_check_online(wm831x, WM831X_PWR_SRC_BATT,
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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_BATT, val);
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break;
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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,
|
|
POWER_SUPPLY_PROP_VOLTAGE_NOW,
|
|
POWER_SUPPLY_PROP_HEALTH,
|
|
POWER_SUPPLY_PROP_CHARGE_TYPE,
|
|
};
|
|
|
|
static const char *wm831x_bat_irqs[] = {
|
|
"BATT HOT",
|
|
"BATT COLD",
|
|
"BATT FAIL",
|
|
"OV",
|
|
"END",
|
|
"TO",
|
|
"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 void 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);
|
|
}
|
|
|
|
static struct platform_driver wm831x_power_driver = {
|
|
.probe = wm831x_power_probe,
|
|
.remove_new = 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 <broonie@opensource.wolfsonmicro.com>");
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_ALIAS("platform:wm831x-power");
|