| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Courtney Cavin | 1105 | 54.76% | 1 | 9.09% |
| David Collins | 571 | 28.30% | 3 | 27.27% |
| Vinod Koul | 210 | 10.41% | 2 | 18.18% |
| Anjelique Melendez | 115 | 5.70% | 2 | 18.18% |
| Shawn Guo | 15 | 0.74% | 1 | 9.09% |
| Thomas Gleixner | 1 | 0.05% | 1 | 9.09% |
| Dmitry Torokhov | 1 | 0.05% | 1 | 9.09% |
| Total | 2018 | 11 |
// SPDX-License-Identifier: GPL-2.0-only /* * Copyright (c) 2010-2011, 2020-2021, The Linux Foundation. All rights reserved. * Copyright (c) 2014, Sony Mobile Communications Inc. */ #include <linux/delay.h> #include <linux/errno.h> #include <linux/input.h> #include <linux/interrupt.h> #include <linux/kernel.h> #include <linux/ktime.h> #include <linux/log2.h> #include <linux/module.h> #include <linux/of.h> #include <linux/of_address.h> #include <linux/of_device.h> #include <linux/platform_device.h> #include <linux/reboot.h> #include <linux/regmap.h> #define PON_REV2 0x01 #define PON_SUBTYPE 0x05 #define PON_SUBTYPE_PRIMARY 0x01 #define PON_SUBTYPE_SECONDARY 0x02 #define PON_SUBTYPE_1REG 0x03 #define PON_SUBTYPE_GEN2_PRIMARY 0x04 #define PON_SUBTYPE_GEN2_SECONDARY 0x05 #define PON_SUBTYPE_GEN3_PBS 0x08 #define PON_SUBTYPE_GEN3_HLOS 0x09 #define PON_RT_STS 0x10 #define PON_KPDPWR_N_SET BIT(0) #define PON_RESIN_N_SET BIT(1) #define PON_GEN3_RESIN_N_SET BIT(6) #define PON_GEN3_KPDPWR_N_SET BIT(7) #define PON_PS_HOLD_RST_CTL 0x5a #define PON_PS_HOLD_RST_CTL2 0x5b #define PON_PS_HOLD_ENABLE BIT(7) #define PON_PS_HOLD_TYPE_MASK 0x0f #define PON_PS_HOLD_TYPE_WARM_RESET 1 #define PON_PS_HOLD_TYPE_SHUTDOWN 4 #define PON_PS_HOLD_TYPE_HARD_RESET 7 #define PON_PULL_CTL 0x70 #define PON_KPDPWR_PULL_UP BIT(1) #define PON_RESIN_PULL_UP BIT(0) #define PON_DBC_CTL 0x71 #define PON_DBC_DELAY_MASK 0x7 struct pm8941_data { unsigned int pull_up_bit; unsigned int status_bit; bool supports_ps_hold_poff_config; bool supports_debounce_config; bool has_pon_pbs; const char *name; const char *phys; }; struct pm8941_pwrkey { struct device *dev; int irq; u32 baseaddr; u32 pon_pbs_baseaddr; struct regmap *regmap; struct input_dev *input; unsigned int revision; unsigned int subtype; struct notifier_block reboot_notifier; u32 code; u32 sw_debounce_time_us; ktime_t sw_debounce_end_time; bool last_status; const struct pm8941_data *data; }; static int pm8941_reboot_notify(struct notifier_block *nb, unsigned long code, void *unused) { struct pm8941_pwrkey *pwrkey = container_of(nb, struct pm8941_pwrkey, reboot_notifier); unsigned int enable_reg; unsigned int reset_type; int error; /* PMICs with revision 0 have the enable bit in same register as ctrl */ if (pwrkey->revision == 0) enable_reg = PON_PS_HOLD_RST_CTL; else enable_reg = PON_PS_HOLD_RST_CTL2; error = regmap_update_bits(pwrkey->regmap, pwrkey->baseaddr + enable_reg, PON_PS_HOLD_ENABLE, 0); if (error) dev_err(pwrkey->dev, "unable to clear ps hold reset enable: %d\n", error); /* * Updates of PON_PS_HOLD_ENABLE requires 3 sleep cycles between * writes. */ usleep_range(100, 1000); switch (code) { case SYS_HALT: case SYS_POWER_OFF: reset_type = PON_PS_HOLD_TYPE_SHUTDOWN; break; case SYS_RESTART: default: if (reboot_mode == REBOOT_WARM) reset_type = PON_PS_HOLD_TYPE_WARM_RESET; else reset_type = PON_PS_HOLD_TYPE_HARD_RESET; break; } error = regmap_update_bits(pwrkey->regmap, pwrkey->baseaddr + PON_PS_HOLD_RST_CTL, PON_PS_HOLD_TYPE_MASK, reset_type); if (error) dev_err(pwrkey->dev, "unable to set ps hold reset type: %d\n", error); error = regmap_update_bits(pwrkey->regmap, pwrkey->baseaddr + enable_reg, PON_PS_HOLD_ENABLE, PON_PS_HOLD_ENABLE); if (error) dev_err(pwrkey->dev, "unable to re-set enable: %d\n", error); return NOTIFY_DONE; } static irqreturn_t pm8941_pwrkey_irq(int irq, void *_data) { struct pm8941_pwrkey *pwrkey = _data; unsigned int sts; int err; if (pwrkey->sw_debounce_time_us) { if (ktime_before(ktime_get(), pwrkey->sw_debounce_end_time)) { dev_dbg(pwrkey->dev, "ignoring key event received before debounce end %llu us\n", pwrkey->sw_debounce_end_time); return IRQ_HANDLED; } } err = regmap_read(pwrkey->regmap, pwrkey->baseaddr + PON_RT_STS, &sts); if (err) return IRQ_HANDLED; sts &= pwrkey->data->status_bit; if (pwrkey->sw_debounce_time_us && !sts) pwrkey->sw_debounce_end_time = ktime_add_us(ktime_get(), pwrkey->sw_debounce_time_us); /* * Simulate a press event in case a release event occurred without a * corresponding press event. */ if (!pwrkey->last_status && !sts) { input_report_key(pwrkey->input, pwrkey->code, 1); input_sync(pwrkey->input); } pwrkey->last_status = sts; input_report_key(pwrkey->input, pwrkey->code, sts); input_sync(pwrkey->input); return IRQ_HANDLED; } static int pm8941_pwrkey_sw_debounce_init(struct pm8941_pwrkey *pwrkey) { unsigned int val, addr, mask; int error; if (pwrkey->data->has_pon_pbs && !pwrkey->pon_pbs_baseaddr) { dev_err(pwrkey->dev, "PON_PBS address missing, can't read HW debounce time\n"); return 0; } if (pwrkey->pon_pbs_baseaddr) addr = pwrkey->pon_pbs_baseaddr + PON_DBC_CTL; else addr = pwrkey->baseaddr + PON_DBC_CTL; error = regmap_read(pwrkey->regmap, addr, &val); if (error) return error; if (pwrkey->subtype >= PON_SUBTYPE_GEN2_PRIMARY) mask = 0xf; else mask = 0x7; pwrkey->sw_debounce_time_us = 2 * USEC_PER_SEC / (1 << (mask - (val & mask))); dev_dbg(pwrkey->dev, "SW debounce time = %u us\n", pwrkey->sw_debounce_time_us); return 0; } static int __maybe_unused pm8941_pwrkey_suspend(struct device *dev) { struct pm8941_pwrkey *pwrkey = dev_get_drvdata(dev); if (device_may_wakeup(dev)) enable_irq_wake(pwrkey->irq); return 0; } static int __maybe_unused pm8941_pwrkey_resume(struct device *dev) { struct pm8941_pwrkey *pwrkey = dev_get_drvdata(dev); if (device_may_wakeup(dev)) disable_irq_wake(pwrkey->irq); return 0; } static SIMPLE_DEV_PM_OPS(pm8941_pwr_key_pm_ops, pm8941_pwrkey_suspend, pm8941_pwrkey_resume); static int pm8941_pwrkey_probe(struct platform_device *pdev) { struct pm8941_pwrkey *pwrkey; bool pull_up; struct device *parent; struct device_node *regmap_node; const __be32 *addr; u32 req_delay; int error; if (of_property_read_u32(pdev->dev.of_node, "debounce", &req_delay)) req_delay = 15625; if (req_delay > 2000000 || req_delay == 0) { dev_err(&pdev->dev, "invalid debounce time: %u\n", req_delay); return -EINVAL; } pull_up = of_property_read_bool(pdev->dev.of_node, "bias-pull-up"); pwrkey = devm_kzalloc(&pdev->dev, sizeof(*pwrkey), GFP_KERNEL); if (!pwrkey) return -ENOMEM; pwrkey->dev = &pdev->dev; pwrkey->data = of_device_get_match_data(&pdev->dev); parent = pdev->dev.parent; regmap_node = pdev->dev.of_node; pwrkey->regmap = dev_get_regmap(parent, NULL); if (!pwrkey->regmap) { regmap_node = parent->of_node; /* * We failed to get regmap for parent. Let's see if we are * a child of pon node and read regmap and reg from its * parent. */ pwrkey->regmap = dev_get_regmap(parent->parent, NULL); if (!pwrkey->regmap) { dev_err(&pdev->dev, "failed to locate regmap\n"); return -ENODEV; } } addr = of_get_address(regmap_node, 0, NULL, NULL); if (!addr) { dev_err(&pdev->dev, "reg property missing\n"); return -EINVAL; } pwrkey->baseaddr = be32_to_cpup(addr); if (pwrkey->data->has_pon_pbs) { /* PON_PBS base address is optional */ addr = of_get_address(regmap_node, 1, NULL, NULL); if (addr) pwrkey->pon_pbs_baseaddr = be32_to_cpup(addr); } pwrkey->irq = platform_get_irq(pdev, 0); if (pwrkey->irq < 0) return pwrkey->irq; error = regmap_read(pwrkey->regmap, pwrkey->baseaddr + PON_REV2, &pwrkey->revision); if (error) { dev_err(&pdev->dev, "failed to read revision: %d\n", error); return error; } error = regmap_read(pwrkey->regmap, pwrkey->baseaddr + PON_SUBTYPE, &pwrkey->subtype); if (error) { dev_err(&pdev->dev, "failed to read subtype: %d\n", error); return error; } error = of_property_read_u32(pdev->dev.of_node, "linux,code", &pwrkey->code); if (error) { dev_dbg(&pdev->dev, "no linux,code assuming power (%d)\n", error); pwrkey->code = KEY_POWER; } pwrkey->input = devm_input_allocate_device(&pdev->dev); if (!pwrkey->input) { dev_dbg(&pdev->dev, "unable to allocate input device\n"); return -ENOMEM; } input_set_capability(pwrkey->input, EV_KEY, pwrkey->code); pwrkey->input->name = pwrkey->data->name; pwrkey->input->phys = pwrkey->data->phys; if (pwrkey->data->supports_debounce_config) { req_delay = (req_delay << 6) / USEC_PER_SEC; req_delay = ilog2(req_delay); error = regmap_update_bits(pwrkey->regmap, pwrkey->baseaddr + PON_DBC_CTL, PON_DBC_DELAY_MASK, req_delay); if (error) { dev_err(&pdev->dev, "failed to set debounce: %d\n", error); return error; } } error = pm8941_pwrkey_sw_debounce_init(pwrkey); if (error) return error; if (pwrkey->data->pull_up_bit) { error = regmap_update_bits(pwrkey->regmap, pwrkey->baseaddr + PON_PULL_CTL, pwrkey->data->pull_up_bit, pull_up ? pwrkey->data->pull_up_bit : 0); if (error) { dev_err(&pdev->dev, "failed to set pull: %d\n", error); return error; } } error = devm_request_threaded_irq(&pdev->dev, pwrkey->irq, NULL, pm8941_pwrkey_irq, IRQF_ONESHOT, pwrkey->data->name, pwrkey); if (error) { dev_err(&pdev->dev, "failed requesting IRQ: %d\n", error); return error; } error = input_register_device(pwrkey->input); if (error) { dev_err(&pdev->dev, "failed to register input device: %d\n", error); return error; } if (pwrkey->data->supports_ps_hold_poff_config) { pwrkey->reboot_notifier.notifier_call = pm8941_reboot_notify; error = register_reboot_notifier(&pwrkey->reboot_notifier); if (error) { dev_err(&pdev->dev, "failed to register reboot notifier: %d\n", error); return error; } } platform_set_drvdata(pdev, pwrkey); device_init_wakeup(&pdev->dev, 1); return 0; } static int pm8941_pwrkey_remove(struct platform_device *pdev) { struct pm8941_pwrkey *pwrkey = platform_get_drvdata(pdev); if (pwrkey->data->supports_ps_hold_poff_config) unregister_reboot_notifier(&pwrkey->reboot_notifier); return 0; } static const struct pm8941_data pwrkey_data = { .pull_up_bit = PON_KPDPWR_PULL_UP, .status_bit = PON_KPDPWR_N_SET, .name = "pm8941_pwrkey", .phys = "pm8941_pwrkey/input0", .supports_ps_hold_poff_config = true, .supports_debounce_config = true, .has_pon_pbs = false, }; static const struct pm8941_data resin_data = { .pull_up_bit = PON_RESIN_PULL_UP, .status_bit = PON_RESIN_N_SET, .name = "pm8941_resin", .phys = "pm8941_resin/input0", .supports_ps_hold_poff_config = true, .supports_debounce_config = true, .has_pon_pbs = false, }; static const struct pm8941_data pon_gen3_pwrkey_data = { .status_bit = PON_GEN3_KPDPWR_N_SET, .name = "pmic_pwrkey", .phys = "pmic_pwrkey/input0", .supports_ps_hold_poff_config = false, .supports_debounce_config = false, .has_pon_pbs = true, }; static const struct pm8941_data pon_gen3_resin_data = { .status_bit = PON_GEN3_RESIN_N_SET, .name = "pmic_resin", .phys = "pmic_resin/input0", .supports_ps_hold_poff_config = false, .supports_debounce_config = false, .has_pon_pbs = true, }; static const struct of_device_id pm8941_pwr_key_id_table[] = { { .compatible = "qcom,pm8941-pwrkey", .data = &pwrkey_data }, { .compatible = "qcom,pm8941-resin", .data = &resin_data }, { .compatible = "qcom,pmk8350-pwrkey", .data = &pon_gen3_pwrkey_data }, { .compatible = "qcom,pmk8350-resin", .data = &pon_gen3_resin_data }, { } }; MODULE_DEVICE_TABLE(of, pm8941_pwr_key_id_table); static struct platform_driver pm8941_pwrkey_driver = { .probe = pm8941_pwrkey_probe, .remove = pm8941_pwrkey_remove, .driver = { .name = "pm8941-pwrkey", .pm = &pm8941_pwr_key_pm_ops, .of_match_table = of_match_ptr(pm8941_pwr_key_id_table), }, }; module_platform_driver(pm8941_pwrkey_driver); MODULE_DESCRIPTION("PM8941 Power Key driver"); MODULE_LICENSE("GPL v2");
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