summaryrefslogtreecommitdiff
path: root/drivers/input/misc/pmic8xxx-pwrkey.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/input/misc/pmic8xxx-pwrkey.c')
-rw-r--r--drivers/input/misc/pmic8xxx-pwrkey.c428
1 files changed, 331 insertions, 97 deletions
diff --git a/drivers/input/misc/pmic8xxx-pwrkey.c b/drivers/input/misc/pmic8xxx-pwrkey.c
index b49b738aa9c6..c406a1cca5c4 100644
--- a/drivers/input/misc/pmic8xxx-pwrkey.c
+++ b/drivers/input/misc/pmic8xxx-pwrkey.c
@@ -1,62 +1,104 @@
+// SPDX-License-Identifier: GPL-2.0-only
/* Copyright (c) 2010-2011, Code Aurora Forum. All rights reserved.
- *
- * 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/module.h>
-#include <linux/init.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/mfd/pm8xxx/core.h>
-#include <linux/input/pmic8xxx-pwrkey.h>
+#include <linux/of.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 {
- struct input_dev *pwr;
int key_press_irq;
+ struct regmap *regmap;
+ int (*shutdown_fn)(struct pmic8xxx_pwrkey *, bool);
};
-static irqreturn_t pwrkey_press_irq(int irq, void *_pwrkey)
+static irqreturn_t pwrkey_press_irq(int irq, void *_pwr)
{
- struct pmic8xxx_pwrkey *pwrkey = _pwrkey;
+ struct input_dev *pwr = _pwr;
- input_report_key(pwrkey->pwr, KEY_POWER, 1);
- input_sync(pwrkey->pwr);
+ input_report_key(pwr, KEY_POWER, 1);
+ input_sync(pwr);
return IRQ_HANDLED;
}
-static irqreturn_t pwrkey_release_irq(int irq, void *_pwrkey)
+static irqreturn_t pwrkey_release_irq(int irq, void *_pwr)
{
- struct pmic8xxx_pwrkey *pwrkey = _pwrkey;
+ struct input_dev *pwr = _pwr;
- input_report_key(pwrkey->pwr, KEY_POWER, 0);
- input_sync(pwrkey->pwr);
+ input_report_key(pwr, KEY_POWER, 0);
+ input_sync(pwr);
return IRQ_HANDLED;
}
-#ifdef CONFIG_PM_SLEEP
static int pmic8xxx_pwrkey_suspend(struct device *dev)
{
struct pmic8xxx_pwrkey *pwrkey = dev_get_drvdata(dev);
@@ -76,11 +118,216 @@ static int pmic8xxx_pwrkey_resume(struct device *dev)
return 0;
}
-#endif
-static SIMPLE_DEV_PM_OPS(pm8xxx_pwr_key_pm_ops,
+static DEFINE_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, &reg);
+ 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, &reg);
+ 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;
@@ -88,127 +335,114 @@ static int pmic8xxx_pwrkey_probe(struct platform_device *pdev)
int key_press_irq = platform_get_irq(pdev, 1);
int err;
unsigned int delay;
- u8 pon_cntl;
+ unsigned int pon_cntl;
+ struct regmap *regmap;
struct pmic8xxx_pwrkey *pwrkey;
- const struct pm8xxx_pwrkey_platform_data *pdata =
- dev_get_platdata(&pdev->dev);
+ u32 kpd_delay;
+ bool pull_up;
- if (!pdata) {
- dev_err(&pdev->dev, "power key platform data not supplied\n");
- return -EINVAL;
- }
+ if (of_property_read_u32(pdev->dev.of_node, "debounce", &kpd_delay))
+ kpd_delay = 15625;
- if (pdata->kpd_trigger_delay_us > 62500) {
+ /* 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;
}
- pwrkey = kzalloc(sizeof(*pwrkey), GFP_KERNEL);
+ 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;
- pwr = input_allocate_device();
+ 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");
- err = -ENOMEM;
- goto free_pwrkey;
+ return -ENOMEM;
}
input_set_capability(pwr, EV_KEY, KEY_POWER);
pwr->name = "pmic8xxx_pwrkey";
pwr->phys = "pmic8xxx_pwrkey/input0";
- pwr->dev.parent = &pdev->dev;
- delay = (pdata->kpd_trigger_delay_us << 10) / USEC_PER_SEC;
- delay = 1 + ilog2(delay);
+ delay = (kpd_delay << 6) / USEC_PER_SEC;
+ delay = ilog2(delay);
- err = pm8xxx_readb(pdev->dev.parent, PON_CNTL_1, &pon_cntl);
+ 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);
- goto free_input_dev;
+ return err;
}
pon_cntl &= ~PON_CNTL_TRIG_DELAY_MASK;
pon_cntl |= (delay & PON_CNTL_TRIG_DELAY_MASK);
- if (pdata->pull_up)
+ if (pull_up)
pon_cntl |= PON_CNTL_PULL_UP;
else
pon_cntl &= ~PON_CNTL_PULL_UP;
- err = pm8xxx_writeb(pdev->dev.parent, PON_CNTL_1, pon_cntl);
+ 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);
- goto free_input_dev;
+ return err;
}
- err = input_register_device(pwr);
+ err = devm_request_irq(&pdev->dev, key_press_irq, pwrkey_press_irq,
+ IRQF_TRIGGER_RISING,
+ "pmic8xxx_pwrkey_press", pwr);
if (err) {
- dev_dbg(&pdev->dev, "Can't register power key: %d\n", err);
- goto free_input_dev;
+ dev_err(&pdev->dev, "Can't get %d IRQ for pwrkey: %d\n",
+ key_press_irq, err);
+ return err;
}
- pwrkey->key_press_irq = key_press_irq;
- pwrkey->pwr = pwr;
-
- platform_set_drvdata(pdev, pwrkey);
-
- err = request_irq(key_press_irq, pwrkey_press_irq,
- IRQF_TRIGGER_RISING, "pmic8xxx_pwrkey_press", pwrkey);
- if (err < 0) {
- dev_dbg(&pdev->dev, "Can't get %d IRQ for pwrkey: %d\n",
- key_press_irq, err);
- goto unreg_input_dev;
+ 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 = request_irq(key_release_irq, pwrkey_release_irq,
- IRQF_TRIGGER_RISING, "pmic8xxx_pwrkey_release", pwrkey);
- if (err < 0) {
- dev_dbg(&pdev->dev, "Can't get %d IRQ for pwrkey: %d\n",
- key_release_irq, err);
-
- goto free_press_irq;
+ err = input_register_device(pwr);
+ if (err) {
+ dev_err(&pdev->dev, "Can't register power key: %d\n", err);
+ return err;
}
- device_init_wakeup(&pdev->dev, pdata->wakeup);
+ platform_set_drvdata(pdev, pwrkey);
+ device_init_wakeup(&pdev->dev, 1);
return 0;
-
-free_press_irq:
- free_irq(key_press_irq, pwrkey);
-unreg_input_dev:
- input_unregister_device(pwr);
- pwr = NULL;
-free_input_dev:
- input_free_device(pwr);
-free_pwrkey:
- kfree(pwrkey);
- return err;
}
-static int pmic8xxx_pwrkey_remove(struct platform_device *pdev)
-{
- struct pmic8xxx_pwrkey *pwrkey = platform_get_drvdata(pdev);
- int key_release_irq = platform_get_irq(pdev, 0);
- int key_press_irq = platform_get_irq(pdev, 1);
-
- device_init_wakeup(&pdev->dev, 0);
-
- free_irq(key_press_irq, pwrkey);
- free_irq(key_release_irq, pwrkey);
- input_unregister_device(pwrkey->pwr);
- kfree(pwrkey);
-
- 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,
- .remove = pmic8xxx_pwrkey_remove,
+ .shutdown = pmic8xxx_pwrkey_shutdown,
.driver = {
- .name = PM8XXX_PWRKEY_DEV_NAME,
- .owner = THIS_MODULE,
- .pm = &pm8xxx_pwr_key_pm_ops,
+ .name = "pm8xxx-pwrkey",
+ .pm = pm_sleep_ptr(&pm8xxx_pwr_key_pm_ops),
+ .of_match_table = pm8xxx_pwr_key_id_table,
},
};
module_platform_driver(pmic8xxx_pwrkey_driver);
generated by cgit (git 2.34.1) at 2025-12-26 03:10:14 +0000