--- zzzz-none-000/linux-3.10.107/drivers/input/misc/pmic8xxx-pwrkey.c 2017-06-27 09:49:32.000000000 +0000 +++ scorpion-7490-727/linux-3.10.107/drivers/input/misc/pmic8xxx-pwrkey.c 2021-02-04 17:41:59.000000000 +0000 @@ -11,53 +11,104 @@ */ #include -#include #include #include #include #include #include #include +#include #include - -#include -#include +#include +#include #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) +static int __maybe_unused pmic8xxx_pwrkey_suspend(struct device *dev) { struct pmic8xxx_pwrkey *pwrkey = dev_get_drvdata(dev); @@ -67,7 +118,7 @@ return 0; } -static int pmic8xxx_pwrkey_resume(struct device *dev) +static int __maybe_unused pmic8xxx_pwrkey_resume(struct device *dev) { struct pmic8xxx_pwrkey *pwrkey = dev_get_drvdata(dev); @@ -76,11 +127,216 @@ return 0; } -#endif 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; @@ -88,129 +344,122 @@ 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, NULL); -unreg_input_dev: - platform_set_drvdata(pdev, NULL); - 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); - platform_set_drvdata(pdev, NULL); - 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, + .name = "pm8xxx-pwrkey", .pm = &pm8xxx_pwr_key_pm_ops, + .of_match_table = pm8xxx_pwr_key_id_table, }, }; module_platform_driver(pmic8xxx_pwrkey_driver);