Adding upstream version 5.10.209.upstream/5.10.209upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 454 insertions, 0 deletions

diff --git a/drivers/input/misc/pmic8xxx-pwrkey.c b/drivers/input/misc/pmic8xxx-pwrkey.c
new file mode 100644
index 000000000..0e818a3d2
--- /dev/null
+++ b/drivers/input/misc/pmic8xxx-pwrkey.c
@@ -0,0 +1,454 @@
+// 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, &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;
+	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>");