| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Stephen Boyd | 1179 | 66.84% | 6 | 60.00% |
| Trilok Soni | 512 | 29.02% | 1 | 10.00% |
| Dmitry Torokhov | 70 | 3.97% | 1 | 10.00% |
| Samuel Ortiz | 2 | 0.11% | 1 | 10.00% |
| JJ Ding | 1 | 0.06% | 1 | 10.00% |
| Total | 1764 | 10 |
/* 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/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>");
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