Commit 68c581d5 authored by Courtney Cavin's avatar Courtney Cavin Committed by Dmitry Torokhov

Input: add Qualcomm PM8941 power key driver

Signed-off-by: default avatarCourtney Cavin <courtney.cavin@sonymobile.com>
Signed-off-by: default avatarBjorn Andersson <bjorn.andersson@sonymobile.com>
Tested-by: default avatarIvan T. Ivanov <iivanov@mm-sol.com>
Signed-off-by: default avatarDmitry Torokhov <dmitry.torokhov@gmail.com>
parent 7e174702
Qualcomm PM8941 PMIC Power Key
PROPERTIES
- compatible:
Usage: required
Value type: <string>
Definition: must be one of:
"qcom,pm8941-pwrkey"
- reg:
Usage: required
Value type: <prop-encoded-array>
Definition: base address of registers for block
- interrupts:
Usage: required
Value type: <prop-encoded-array>
Definition: key change interrupt; The format of the specifier is
defined by the binding document describing the node's
interrupt parent.
- debounce:
Usage: optional
Value type: <u32>
Definition: time in microseconds that key must be pressed or released
for state change interrupt to trigger.
- bias-pull-up:
Usage: optional
Value type: <empty>
Definition: presence of this property indicates that the KPDPWR_N pin
should be configured for pull up.
EXAMPLE
pwrkey@800 {
compatible = "qcom,pm8941-pwrkey";
reg = <0x800>;
interrupts = <0x0 0x8 0 IRQ_TYPE_EDGE_BOTH>;
debounce = <15625>;
bias-pull-up;
};
...@@ -115,6 +115,18 @@ config INPUT_PCSPKR ...@@ -115,6 +115,18 @@ config INPUT_PCSPKR
To compile this driver as a module, choose M here: the To compile this driver as a module, choose M here: the
module will be called pcspkr. module will be called pcspkr.
config INPUT_PM8941_PWRKEY
tristate "Qualcomm PM8941 power key support"
depends on MFD_SPMI_PMIC
help
Say Y here if you want support for the power key usually found
on boards using a Qualcomm PM8941 compatible PMIC.
If unsure, say Y.
To compile this driver as a module, choose M here: the module
will be called pm8941-pwrkey.
config INPUT_PM8XXX_VIBRATOR config INPUT_PM8XXX_VIBRATOR
tristate "Qualcomm PM8XXX vibrator support" tristate "Qualcomm PM8XXX vibrator support"
depends on MFD_PM8XXX depends on MFD_PM8XXX
......
...@@ -50,6 +50,7 @@ obj-$(CONFIG_INPUT_PCAP) += pcap_keys.o ...@@ -50,6 +50,7 @@ obj-$(CONFIG_INPUT_PCAP) += pcap_keys.o
obj-$(CONFIG_INPUT_PCF50633_PMU) += pcf50633-input.o obj-$(CONFIG_INPUT_PCF50633_PMU) += pcf50633-input.o
obj-$(CONFIG_INPUT_PCF8574) += pcf8574_keypad.o obj-$(CONFIG_INPUT_PCF8574) += pcf8574_keypad.o
obj-$(CONFIG_INPUT_PCSPKR) += pcspkr.o obj-$(CONFIG_INPUT_PCSPKR) += pcspkr.o
obj-$(CONFIG_INPUT_PM8941_PWRKEY) += pm8941-pwrkey.o
obj-$(CONFIG_INPUT_PM8XXX_VIBRATOR) += pm8xxx-vibrator.o obj-$(CONFIG_INPUT_PM8XXX_VIBRATOR) += pm8xxx-vibrator.o
obj-$(CONFIG_INPUT_PMIC8XXX_PWRKEY) += pmic8xxx-pwrkey.o obj-$(CONFIG_INPUT_PMIC8XXX_PWRKEY) += pmic8xxx-pwrkey.o
obj-$(CONFIG_INPUT_POWERMATE) += powermate.o obj-$(CONFIG_INPUT_POWERMATE) += powermate.o
......
/*
* Copyright (c) 2010-2011, Code Aurora Forum. All rights reserved.
* Copyright (c) 2014, Sony Mobile Communications Inc.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 and
* only version 2 as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include <linux/delay.h>
#include <linux/errno.h>
#include <linux/input.h>
#include <linux/interrupt.h>
#include <linux/kernel.h>
#include <linux/log2.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/platform_device.h>
#include <linux/reboot.h>
#include <linux/regmap.h>
#define PON_REV2 0x01
#define PON_RT_STS 0x10
#define PON_KPDPWR_N_SET BIT(0)
#define PON_PS_HOLD_RST_CTL 0x5a
#define PON_PS_HOLD_RST_CTL2 0x5b
#define PON_PS_HOLD_ENABLE BIT(7)
#define PON_PS_HOLD_TYPE_MASK 0x0f
#define PON_PS_HOLD_TYPE_SHUTDOWN 4
#define PON_PS_HOLD_TYPE_HARD_RESET 7
#define PON_PULL_CTL 0x70
#define PON_KPDPWR_PULL_UP BIT(1)
#define PON_DBC_CTL 0x71
#define PON_DBC_DELAY_MASK 0x7
struct pm8941_pwrkey {
struct device *dev;
int irq;
u32 baseaddr;
struct regmap *regmap;
struct input_dev *input;
unsigned int revision;
struct notifier_block reboot_notifier;
};
static int pm8941_reboot_notify(struct notifier_block *nb,
unsigned long code, void *unused)
{
struct pm8941_pwrkey *pwrkey = container_of(nb, struct pm8941_pwrkey,
reboot_notifier);
unsigned int enable_reg;
unsigned int reset_type;
int error;
/* PMICs with revision 0 have the enable bit in same register as ctrl */
if (pwrkey->revision == 0)
enable_reg = PON_PS_HOLD_RST_CTL;
else
enable_reg = PON_PS_HOLD_RST_CTL2;
error = regmap_update_bits(pwrkey->regmap,
pwrkey->baseaddr + enable_reg,
PON_PS_HOLD_ENABLE,
0);
if (error)
dev_err(pwrkey->dev,
"unable to clear ps hold reset enable: %d\n",
error);
/*
* Updates of PON_PS_HOLD_ENABLE requires 3 sleep cycles between
* writes.
*/
usleep_range(100, 1000);
switch (code) {
case SYS_HALT:
case SYS_POWER_OFF:
reset_type = PON_PS_HOLD_TYPE_SHUTDOWN;
break;
case SYS_RESTART:
default:
reset_type = PON_PS_HOLD_TYPE_HARD_RESET;
break;
};
error = regmap_update_bits(pwrkey->regmap,
pwrkey->baseaddr + PON_PS_HOLD_RST_CTL,
PON_PS_HOLD_TYPE_MASK,
reset_type);
if (error)
dev_err(pwrkey->dev, "unable to set ps hold reset type: %d\n",
error);
error = regmap_update_bits(pwrkey->regmap,
pwrkey->baseaddr + enable_reg,
PON_PS_HOLD_ENABLE,
PON_PS_HOLD_ENABLE);
if (error)
dev_err(pwrkey->dev, "unable to re-set enable: %d\n", error);
return NOTIFY_DONE;
}
static irqreturn_t pm8941_pwrkey_irq(int irq, void *_data)
{
struct pm8941_pwrkey *pwrkey = _data;
unsigned int sts;
int error;
error = regmap_read(pwrkey->regmap,
pwrkey->baseaddr + PON_RT_STS, &sts);
if (error)
return IRQ_HANDLED;
input_report_key(pwrkey->input, KEY_POWER, !!(sts & PON_KPDPWR_N_SET));
input_sync(pwrkey->input);
return IRQ_HANDLED;
}
static int __maybe_unused pm8941_pwrkey_suspend(struct device *dev)
{
struct pm8941_pwrkey *pwrkey = dev_get_drvdata(dev);
if (device_may_wakeup(dev))
enable_irq_wake(pwrkey->irq);
return 0;
}
static int __maybe_unused pm8941_pwrkey_resume(struct device *dev)
{
struct pm8941_pwrkey *pwrkey = dev_get_drvdata(dev);
if (device_may_wakeup(dev))
disable_irq_wake(pwrkey->irq);
return 0;
}
static SIMPLE_DEV_PM_OPS(pm8941_pwr_key_pm_ops,
pm8941_pwrkey_suspend, pm8941_pwrkey_resume);
static int pm8941_pwrkey_probe(struct platform_device *pdev)
{
struct pm8941_pwrkey *pwrkey;
bool pull_up;
u32 req_delay;
int error;
if (of_property_read_u32(pdev->dev.of_node, "debounce", &req_delay))
req_delay = 15625;
if (req_delay > 2000000 || req_delay == 0) {
dev_err(&pdev->dev, "invalid debounce time: %u\n", req_delay);
return -EINVAL;
}
pull_up = of_property_read_bool(pdev->dev.of_node, "bias-pull-up");
pwrkey = devm_kzalloc(&pdev->dev, sizeof(*pwrkey), GFP_KERNEL);
if (!pwrkey)
return -ENOMEM;
pwrkey->dev = &pdev->dev;
pwrkey->regmap = dev_get_regmap(pdev->dev.parent, NULL);
if (!pwrkey->regmap) {
dev_err(&pdev->dev, "failed to locate regmap\n");
return -ENODEV;
}
pwrkey->irq = platform_get_irq(pdev, 0);
if (pwrkey->irq < 0) {
dev_err(&pdev->dev, "failed to get irq\n");
return pwrkey->irq;
}
error = of_property_read_u32(pdev->dev.of_node, "reg",
&pwrkey->baseaddr);
if (error)
return error;
error = regmap_read(pwrkey->regmap, pwrkey->baseaddr + PON_REV2,
&pwrkey->revision);
if (error) {
dev_err(&pdev->dev, "failed to set debounce: %d\n", error);
return error;
}
pwrkey->input = devm_input_allocate_device(&pdev->dev);
if (!pwrkey->input) {
dev_dbg(&pdev->dev, "unable to allocate input device\n");
return -ENOMEM;
}
input_set_capability(pwrkey->input, EV_KEY, KEY_POWER);
pwrkey->input->name = "pm8941_pwrkey";
pwrkey->input->phys = "pm8941_pwrkey/input0";
req_delay = (req_delay << 6) / USEC_PER_SEC;
req_delay = ilog2(req_delay);
error = regmap_update_bits(pwrkey->regmap,
pwrkey->baseaddr + PON_DBC_CTL,
PON_DBC_DELAY_MASK,
req_delay);
if (error) {
dev_err(&pdev->dev, "failed to set debounce: %d\n", error);
return error;
}
error = regmap_update_bits(pwrkey->regmap,
pwrkey->baseaddr + PON_PULL_CTL,
PON_KPDPWR_PULL_UP,
pull_up ? PON_KPDPWR_PULL_UP : 0);
if (error) {
dev_err(&pdev->dev, "failed to set pull: %d\n", error);
return error;
}
error = devm_request_threaded_irq(&pdev->dev, pwrkey->irq,
NULL, pm8941_pwrkey_irq,
IRQF_ONESHOT,
"pm8941_pwrkey", pwrkey);
if (error) {
dev_err(&pdev->dev, "failed requesting IRQ: %d\n", error);
return error;
}
error = input_register_device(pwrkey->input);
if (error) {
dev_err(&pdev->dev, "failed to register input device: %d\n",
error);
return error;
}
pwrkey->reboot_notifier.notifier_call = pm8941_reboot_notify,
error = register_reboot_notifier(&pwrkey->reboot_notifier);
if (error) {
dev_err(&pdev->dev, "failed to register reboot notifier: %d\n",
error);
return error;
}
platform_set_drvdata(pdev, pwrkey);
device_init_wakeup(&pdev->dev, 1);
return 0;
}
static int pm8941_pwrkey_remove(struct platform_device *pdev)
{
struct pm8941_pwrkey *pwrkey = platform_get_drvdata(pdev);
device_init_wakeup(&pdev->dev, 0);
unregister_reboot_notifier(&pwrkey->reboot_notifier);
return 0;
}
static const struct of_device_id pm8941_pwr_key_id_table[] = {
{ .compatible = "qcom,pm8941-pwrkey" },
{ }
};
MODULE_DEVICE_TABLE(of, pm8941_pwr_key_id_table);
static struct platform_driver pm8941_pwrkey_driver = {
.probe = pm8941_pwrkey_probe,
.remove = pm8941_pwrkey_remove,
.driver = {
.name = "pm8941-pwrkey",
.pm = &pm8941_pwr_key_pm_ops,
.of_match_table = of_match_ptr(pm8941_pwr_key_id_table),
},
};
module_platform_driver(pm8941_pwrkey_driver);
MODULE_DESCRIPTION("PM8941 Power Key driver");
MODULE_LICENSE("GPL v2");
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