455 строки
12 KiB
C
455 строки
12 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
|
|
/* Copyright (c) 2010-2011, Code Aurora Forum. All rights reserved.
|
|
*/
|
|
|
|
#include <linux/module.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/errno.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/input.h>
|
|
#include <linux/interrupt.h>
|
|
#include <linux/platform_device.h>
|
|
#include <linux/regmap.h>
|
|
#include <linux/log2.h>
|
|
#include <linux/of.h>
|
|
#include <linux/of_device.h>
|
|
|
|
#define PON_CNTL_1 0x1C
|
|
#define PON_CNTL_PULL_UP BIT(7)
|
|
#define PON_CNTL_TRIG_DELAY_MASK (0x7)
|
|
#define PON_CNTL_1_PULL_UP_EN 0xe0
|
|
#define PON_CNTL_1_USB_PWR_EN 0x10
|
|
#define PON_CNTL_1_WD_EN_RESET 0x08
|
|
|
|
#define PM8058_SLEEP_CTRL 0x02b
|
|
#define PM8921_SLEEP_CTRL 0x10a
|
|
|
|
#define SLEEP_CTRL_SMPL_EN_RESET 0x04
|
|
|
|
/* Regulator master enable addresses */
|
|
#define REG_PM8058_VREG_EN_MSM 0x018
|
|
#define REG_PM8058_VREG_EN_GRP_5_4 0x1c8
|
|
|
|
/* Regulator control registers for shutdown/reset */
|
|
#define PM8058_S0_CTRL 0x004
|
|
#define PM8058_S1_CTRL 0x005
|
|
#define PM8058_S3_CTRL 0x111
|
|
#define PM8058_L21_CTRL 0x120
|
|
#define PM8058_L22_CTRL 0x121
|
|
|
|
#define PM8058_REGULATOR_ENABLE_MASK 0x80
|
|
#define PM8058_REGULATOR_ENABLE 0x80
|
|
#define PM8058_REGULATOR_DISABLE 0x00
|
|
#define PM8058_REGULATOR_PULL_DOWN_MASK 0x40
|
|
#define PM8058_REGULATOR_PULL_DOWN_EN 0x40
|
|
|
|
/* Buck CTRL register */
|
|
#define PM8058_SMPS_LEGACY_VREF_SEL 0x20
|
|
#define PM8058_SMPS_LEGACY_VPROG_MASK 0x1f
|
|
#define PM8058_SMPS_ADVANCED_BAND_MASK 0xC0
|
|
#define PM8058_SMPS_ADVANCED_BAND_SHIFT 6
|
|
#define PM8058_SMPS_ADVANCED_VPROG_MASK 0x3f
|
|
|
|
/* Buck TEST2 registers for shutdown/reset */
|
|
#define PM8058_S0_TEST2 0x084
|
|
#define PM8058_S1_TEST2 0x085
|
|
#define PM8058_S3_TEST2 0x11a
|
|
|
|
#define PM8058_REGULATOR_BANK_WRITE 0x80
|
|
#define PM8058_REGULATOR_BANK_MASK 0x70
|
|
#define PM8058_REGULATOR_BANK_SHIFT 4
|
|
#define PM8058_REGULATOR_BANK_SEL(n) ((n) << PM8058_REGULATOR_BANK_SHIFT)
|
|
|
|
/* Buck TEST2 register bank 1 */
|
|
#define PM8058_SMPS_LEGACY_VLOW_SEL 0x01
|
|
|
|
/* Buck TEST2 register bank 7 */
|
|
#define PM8058_SMPS_ADVANCED_MODE_MASK 0x02
|
|
#define PM8058_SMPS_ADVANCED_MODE 0x02
|
|
#define PM8058_SMPS_LEGACY_MODE 0x00
|
|
|
|
/**
|
|
* struct pmic8xxx_pwrkey - pmic8xxx pwrkey information
|
|
* @key_press_irq: key press irq number
|
|
* @regmap: device regmap
|
|
* @shutdown_fn: shutdown configuration function
|
|
*/
|
|
struct pmic8xxx_pwrkey {
|
|
int key_press_irq;
|
|
struct regmap *regmap;
|
|
int (*shutdown_fn)(struct pmic8xxx_pwrkey *, bool);
|
|
};
|
|
|
|
static irqreturn_t pwrkey_press_irq(int irq, void *_pwr)
|
|
{
|
|
struct input_dev *pwr = _pwr;
|
|
|
|
input_report_key(pwr, KEY_POWER, 1);
|
|
input_sync(pwr);
|
|
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
static irqreturn_t pwrkey_release_irq(int irq, void *_pwr)
|
|
{
|
|
struct input_dev *pwr = _pwr;
|
|
|
|
input_report_key(pwr, KEY_POWER, 0);
|
|
input_sync(pwr);
|
|
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
static int __maybe_unused pmic8xxx_pwrkey_suspend(struct device *dev)
|
|
{
|
|
struct pmic8xxx_pwrkey *pwrkey = dev_get_drvdata(dev);
|
|
|
|
if (device_may_wakeup(dev))
|
|
enable_irq_wake(pwrkey->key_press_irq);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int __maybe_unused pmic8xxx_pwrkey_resume(struct device *dev)
|
|
{
|
|
struct pmic8xxx_pwrkey *pwrkey = dev_get_drvdata(dev);
|
|
|
|
if (device_may_wakeup(dev))
|
|
disable_irq_wake(pwrkey->key_press_irq);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static SIMPLE_DEV_PM_OPS(pm8xxx_pwr_key_pm_ops,
|
|
pmic8xxx_pwrkey_suspend, pmic8xxx_pwrkey_resume);
|
|
|
|
static void pmic8xxx_pwrkey_shutdown(struct platform_device *pdev)
|
|
{
|
|
struct pmic8xxx_pwrkey *pwrkey = platform_get_drvdata(pdev);
|
|
int error;
|
|
u8 mask, val;
|
|
bool reset = system_state == SYSTEM_RESTART;
|
|
|
|
if (pwrkey->shutdown_fn) {
|
|
error = pwrkey->shutdown_fn(pwrkey, reset);
|
|
if (error)
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* Select action to perform (reset or shutdown) when PS_HOLD goes low.
|
|
* Also ensure that KPD, CBL0, and CBL1 pull ups are enabled and that
|
|
* USB charging is enabled.
|
|
*/
|
|
mask = PON_CNTL_1_PULL_UP_EN | PON_CNTL_1_USB_PWR_EN;
|
|
mask |= PON_CNTL_1_WD_EN_RESET;
|
|
val = mask;
|
|
if (!reset)
|
|
val &= ~PON_CNTL_1_WD_EN_RESET;
|
|
|
|
regmap_update_bits(pwrkey->regmap, PON_CNTL_1, mask, val);
|
|
}
|
|
|
|
/*
|
|
* Set an SMPS regulator to be disabled in its CTRL register, but enabled
|
|
* in the master enable register. Also set it's pull down enable bit.
|
|
* Take care to make sure that the output voltage doesn't change if switching
|
|
* from advanced mode to legacy mode.
|
|
*/
|
|
static int pm8058_disable_smps_locally_set_pull_down(struct regmap *regmap,
|
|
u16 ctrl_addr, u16 test2_addr, u16 master_enable_addr,
|
|
u8 master_enable_bit)
|
|
{
|
|
int error;
|
|
u8 vref_sel, vlow_sel, band, vprog, bank;
|
|
unsigned int reg;
|
|
|
|
bank = PM8058_REGULATOR_BANK_SEL(7);
|
|
error = regmap_write(regmap, test2_addr, bank);
|
|
if (error)
|
|
return error;
|
|
|
|
error = regmap_read(regmap, test2_addr, ®);
|
|
if (error)
|
|
return error;
|
|
|
|
reg &= PM8058_SMPS_ADVANCED_MODE_MASK;
|
|
/* Check if in advanced mode. */
|
|
if (reg == PM8058_SMPS_ADVANCED_MODE) {
|
|
/* Determine current output voltage. */
|
|
error = regmap_read(regmap, ctrl_addr, ®);
|
|
if (error)
|
|
return error;
|
|
|
|
band = reg & PM8058_SMPS_ADVANCED_BAND_MASK;
|
|
band >>= PM8058_SMPS_ADVANCED_BAND_SHIFT;
|
|
switch (band) {
|
|
case 3:
|
|
vref_sel = 0;
|
|
vlow_sel = 0;
|
|
break;
|
|
case 2:
|
|
vref_sel = PM8058_SMPS_LEGACY_VREF_SEL;
|
|
vlow_sel = 0;
|
|
break;
|
|
case 1:
|
|
vref_sel = PM8058_SMPS_LEGACY_VREF_SEL;
|
|
vlow_sel = PM8058_SMPS_LEGACY_VLOW_SEL;
|
|
break;
|
|
default:
|
|
pr_err("%s: regulator already disabled\n", __func__);
|
|
return -EPERM;
|
|
}
|
|
vprog = reg & PM8058_SMPS_ADVANCED_VPROG_MASK;
|
|
/* Round up if fine step is in use. */
|
|
vprog = (vprog + 1) >> 1;
|
|
if (vprog > PM8058_SMPS_LEGACY_VPROG_MASK)
|
|
vprog = PM8058_SMPS_LEGACY_VPROG_MASK;
|
|
|
|
/* Set VLOW_SEL bit. */
|
|
bank = PM8058_REGULATOR_BANK_SEL(1);
|
|
error = regmap_write(regmap, test2_addr, bank);
|
|
if (error)
|
|
return error;
|
|
|
|
error = regmap_update_bits(regmap, test2_addr,
|
|
PM8058_REGULATOR_BANK_WRITE | PM8058_REGULATOR_BANK_MASK
|
|
| PM8058_SMPS_LEGACY_VLOW_SEL,
|
|
PM8058_REGULATOR_BANK_WRITE |
|
|
PM8058_REGULATOR_BANK_SEL(1) | vlow_sel);
|
|
if (error)
|
|
return error;
|
|
|
|
/* Switch to legacy mode */
|
|
bank = PM8058_REGULATOR_BANK_SEL(7);
|
|
error = regmap_write(regmap, test2_addr, bank);
|
|
if (error)
|
|
return error;
|
|
|
|
error = regmap_update_bits(regmap, test2_addr,
|
|
PM8058_REGULATOR_BANK_WRITE |
|
|
PM8058_REGULATOR_BANK_MASK |
|
|
PM8058_SMPS_ADVANCED_MODE_MASK,
|
|
PM8058_REGULATOR_BANK_WRITE |
|
|
PM8058_REGULATOR_BANK_SEL(7) |
|
|
PM8058_SMPS_LEGACY_MODE);
|
|
if (error)
|
|
return error;
|
|
|
|
/* Enable locally, enable pull down, keep voltage the same. */
|
|
error = regmap_update_bits(regmap, ctrl_addr,
|
|
PM8058_REGULATOR_ENABLE_MASK |
|
|
PM8058_REGULATOR_PULL_DOWN_MASK |
|
|
PM8058_SMPS_LEGACY_VREF_SEL |
|
|
PM8058_SMPS_LEGACY_VPROG_MASK,
|
|
PM8058_REGULATOR_ENABLE | PM8058_REGULATOR_PULL_DOWN_EN
|
|
| vref_sel | vprog);
|
|
if (error)
|
|
return error;
|
|
}
|
|
|
|
/* Enable in master control register. */
|
|
error = regmap_update_bits(regmap, master_enable_addr,
|
|
master_enable_bit, master_enable_bit);
|
|
if (error)
|
|
return error;
|
|
|
|
/* Disable locally and enable pull down. */
|
|
return regmap_update_bits(regmap, ctrl_addr,
|
|
PM8058_REGULATOR_ENABLE_MASK | PM8058_REGULATOR_PULL_DOWN_MASK,
|
|
PM8058_REGULATOR_DISABLE | PM8058_REGULATOR_PULL_DOWN_EN);
|
|
}
|
|
|
|
static int pm8058_disable_ldo_locally_set_pull_down(struct regmap *regmap,
|
|
u16 ctrl_addr, u16 master_enable_addr, u8 master_enable_bit)
|
|
{
|
|
int error;
|
|
|
|
/* Enable LDO in master control register. */
|
|
error = regmap_update_bits(regmap, master_enable_addr,
|
|
master_enable_bit, master_enable_bit);
|
|
if (error)
|
|
return error;
|
|
|
|
/* Disable LDO in CTRL register and set pull down */
|
|
return regmap_update_bits(regmap, ctrl_addr,
|
|
PM8058_REGULATOR_ENABLE_MASK | PM8058_REGULATOR_PULL_DOWN_MASK,
|
|
PM8058_REGULATOR_DISABLE | PM8058_REGULATOR_PULL_DOWN_EN);
|
|
}
|
|
|
|
static int pm8058_pwrkey_shutdown(struct pmic8xxx_pwrkey *pwrkey, bool reset)
|
|
{
|
|
int error;
|
|
struct regmap *regmap = pwrkey->regmap;
|
|
u8 mask, val;
|
|
|
|
/* When shutting down, enable active pulldowns on important rails. */
|
|
if (!reset) {
|
|
/* Disable SMPS's 0,1,3 locally and set pulldown enable bits. */
|
|
pm8058_disable_smps_locally_set_pull_down(regmap,
|
|
PM8058_S0_CTRL, PM8058_S0_TEST2,
|
|
REG_PM8058_VREG_EN_MSM, BIT(7));
|
|
pm8058_disable_smps_locally_set_pull_down(regmap,
|
|
PM8058_S1_CTRL, PM8058_S1_TEST2,
|
|
REG_PM8058_VREG_EN_MSM, BIT(6));
|
|
pm8058_disable_smps_locally_set_pull_down(regmap,
|
|
PM8058_S3_CTRL, PM8058_S3_TEST2,
|
|
REG_PM8058_VREG_EN_GRP_5_4, BIT(7) | BIT(4));
|
|
/* Disable LDO 21 locally and set pulldown enable bit. */
|
|
pm8058_disable_ldo_locally_set_pull_down(regmap,
|
|
PM8058_L21_CTRL, REG_PM8058_VREG_EN_GRP_5_4,
|
|
BIT(1));
|
|
}
|
|
|
|
/*
|
|
* Fix-up: Set regulator LDO22 to 1.225 V in high power mode. Leave its
|
|
* pull-down state intact. This ensures a safe shutdown.
|
|
*/
|
|
error = regmap_update_bits(regmap, PM8058_L22_CTRL, 0xbf, 0x93);
|
|
if (error)
|
|
return error;
|
|
|
|
/* Enable SMPL if resetting is desired */
|
|
mask = SLEEP_CTRL_SMPL_EN_RESET;
|
|
val = 0;
|
|
if (reset)
|
|
val = mask;
|
|
return regmap_update_bits(regmap, PM8058_SLEEP_CTRL, mask, val);
|
|
}
|
|
|
|
static int pm8921_pwrkey_shutdown(struct pmic8xxx_pwrkey *pwrkey, bool reset)
|
|
{
|
|
struct regmap *regmap = pwrkey->regmap;
|
|
u8 mask = SLEEP_CTRL_SMPL_EN_RESET;
|
|
u8 val = 0;
|
|
|
|
/* Enable SMPL if resetting is desired */
|
|
if (reset)
|
|
val = mask;
|
|
return regmap_update_bits(regmap, PM8921_SLEEP_CTRL, mask, val);
|
|
}
|
|
|
|
static int pmic8xxx_pwrkey_probe(struct platform_device *pdev)
|
|
{
|
|
struct input_dev *pwr;
|
|
int key_release_irq = platform_get_irq(pdev, 0);
|
|
int key_press_irq = platform_get_irq(pdev, 1);
|
|
int err;
|
|
unsigned int delay;
|
|
unsigned int pon_cntl;
|
|
struct regmap *regmap;
|
|
struct pmic8xxx_pwrkey *pwrkey;
|
|
u32 kpd_delay;
|
|
bool pull_up;
|
|
|
|
if (of_property_read_u32(pdev->dev.of_node, "debounce", &kpd_delay))
|
|
kpd_delay = 15625;
|
|
|
|
/* Valid range of pwr key trigger delay is 1/64 sec to 2 seconds. */
|
|
if (kpd_delay > USEC_PER_SEC * 2 || kpd_delay < USEC_PER_SEC / 64) {
|
|
dev_err(&pdev->dev, "invalid power key trigger delay\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
pull_up = of_property_read_bool(pdev->dev.of_node, "pull-up");
|
|
|
|
regmap = dev_get_regmap(pdev->dev.parent, NULL);
|
|
if (!regmap) {
|
|
dev_err(&pdev->dev, "failed to locate regmap for the device\n");
|
|
return -ENODEV;
|
|
}
|
|
|
|
pwrkey = devm_kzalloc(&pdev->dev, sizeof(*pwrkey), GFP_KERNEL);
|
|
if (!pwrkey)
|
|
return -ENOMEM;
|
|
|
|
pwrkey->shutdown_fn = of_device_get_match_data(&pdev->dev);
|
|
pwrkey->regmap = regmap;
|
|
pwrkey->key_press_irq = key_press_irq;
|
|
|
|
pwr = devm_input_allocate_device(&pdev->dev);
|
|
if (!pwr) {
|
|
dev_dbg(&pdev->dev, "Can't allocate power button\n");
|
|
return -ENOMEM;
|
|
}
|
|
|
|
input_set_capability(pwr, EV_KEY, KEY_POWER);
|
|
|
|
pwr->name = "pmic8xxx_pwrkey";
|
|
pwr->phys = "pmic8xxx_pwrkey/input0";
|
|
|
|
delay = (kpd_delay << 6) / USEC_PER_SEC;
|
|
delay = ilog2(delay);
|
|
|
|
err = regmap_read(regmap, PON_CNTL_1, &pon_cntl);
|
|
if (err < 0) {
|
|
dev_err(&pdev->dev, "failed reading PON_CNTL_1 err=%d\n", err);
|
|
return err;
|
|
}
|
|
|
|
pon_cntl &= ~PON_CNTL_TRIG_DELAY_MASK;
|
|
pon_cntl |= (delay & PON_CNTL_TRIG_DELAY_MASK);
|
|
if (pull_up)
|
|
pon_cntl |= PON_CNTL_PULL_UP;
|
|
else
|
|
pon_cntl &= ~PON_CNTL_PULL_UP;
|
|
|
|
err = regmap_write(regmap, PON_CNTL_1, pon_cntl);
|
|
if (err < 0) {
|
|
dev_err(&pdev->dev, "failed writing PON_CNTL_1 err=%d\n", err);
|
|
return err;
|
|
}
|
|
|
|
err = devm_request_irq(&pdev->dev, key_press_irq, pwrkey_press_irq,
|
|
IRQF_TRIGGER_RISING,
|
|
"pmic8xxx_pwrkey_press", pwr);
|
|
if (err) {
|
|
dev_err(&pdev->dev, "Can't get %d IRQ for pwrkey: %d\n",
|
|
key_press_irq, err);
|
|
return err;
|
|
}
|
|
|
|
err = devm_request_irq(&pdev->dev, key_release_irq, pwrkey_release_irq,
|
|
IRQF_TRIGGER_RISING,
|
|
"pmic8xxx_pwrkey_release", pwr);
|
|
if (err) {
|
|
dev_err(&pdev->dev, "Can't get %d IRQ for pwrkey: %d\n",
|
|
key_release_irq, err);
|
|
return err;
|
|
}
|
|
|
|
err = input_register_device(pwr);
|
|
if (err) {
|
|
dev_err(&pdev->dev, "Can't register power key: %d\n", err);
|
|
return err;
|
|
}
|
|
|
|
platform_set_drvdata(pdev, pwrkey);
|
|
device_init_wakeup(&pdev->dev, 1);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct of_device_id pm8xxx_pwr_key_id_table[] = {
|
|
{ .compatible = "qcom,pm8058-pwrkey", .data = &pm8058_pwrkey_shutdown },
|
|
{ .compatible = "qcom,pm8921-pwrkey", .data = &pm8921_pwrkey_shutdown },
|
|
{ }
|
|
};
|
|
MODULE_DEVICE_TABLE(of, pm8xxx_pwr_key_id_table);
|
|
|
|
static struct platform_driver pmic8xxx_pwrkey_driver = {
|
|
.probe = pmic8xxx_pwrkey_probe,
|
|
.shutdown = pmic8xxx_pwrkey_shutdown,
|
|
.driver = {
|
|
.name = "pm8xxx-pwrkey",
|
|
.pm = &pm8xxx_pwr_key_pm_ops,
|
|
.of_match_table = pm8xxx_pwr_key_id_table,
|
|
},
|
|
};
|
|
module_platform_driver(pmic8xxx_pwrkey_driver);
|
|
|
|
MODULE_ALIAS("platform:pmic8xxx_pwrkey");
|
|
MODULE_DESCRIPTION("PMIC8XXX Power Key driver");
|
|
MODULE_LICENSE("GPL v2");
|
|
MODULE_AUTHOR("Trilok Soni <tsoni@codeaurora.org>");
|