From 9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 Mon Sep 17 00:00:00 2001 From: Yunhong Jiang Date: Tue, 4 Aug 2015 12:17:53 -0700 Subject: Add the rt linux 4.1.3-rt3 as base Import the rt linux 4.1.3-rt3 as OPNFV kvm base. It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and the base is: commit 0917f823c59692d751951bf5ea699a2d1e2f26a2 Author: Sebastian Andrzej Siewior Date: Sat Jul 25 12:13:34 2015 +0200 Prepare v4.1.3-rt3 Signed-off-by: Sebastian Andrzej Siewior We lose all the git history this way and it's not good. We should apply another opnfv project repo in future. Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423 Signed-off-by: Yunhong Jiang --- kernel/drivers/input/misc/pm8941-pwrkey.c | 293 ++++++++++++++++++++++++++++++ 1 file changed, 293 insertions(+) create mode 100644 kernel/drivers/input/misc/pm8941-pwrkey.c (limited to 'kernel/drivers/input/misc/pm8941-pwrkey.c') diff --git a/kernel/drivers/input/misc/pm8941-pwrkey.c b/kernel/drivers/input/misc/pm8941-pwrkey.c new file mode 100644 index 000000000..867db8a91 --- /dev/null +++ b/kernel/drivers/input/misc/pm8941-pwrkey.c @@ -0,0 +1,293 @@ +/* + * Copyright (c) 2010-2011, Code Aurora Forum. All rights reserved. + * Copyright (c) 2014, Sony Mobile Communications Inc. + * + * 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 +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#define PON_REV2 0x01 + +#define PON_RT_STS 0x10 +#define PON_KPDPWR_N_SET BIT(0) + +#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_SHUTDOWN 4 +#define PON_PS_HOLD_TYPE_HARD_RESET 7 + +#define PON_PULL_CTL 0x70 +#define PON_KPDPWR_PULL_UP BIT(1) + +#define PON_DBC_CTL 0x71 +#define PON_DBC_DELAY_MASK 0x7 + + +struct pm8941_pwrkey { + struct device *dev; + int irq; + u32 baseaddr; + struct regmap *regmap; + struct input_dev *input; + + unsigned int revision; + struct notifier_block reboot_notifier; +}; + +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: + 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 error; + + error = regmap_read(pwrkey->regmap, + pwrkey->baseaddr + PON_RT_STS, &sts); + if (error) + return IRQ_HANDLED; + + input_report_key(pwrkey->input, KEY_POWER, !!(sts & PON_KPDPWR_N_SET)); + input_sync(pwrkey->input); + + return IRQ_HANDLED; +} + +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; + 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->regmap = dev_get_regmap(pdev->dev.parent, NULL); + if (!pwrkey->regmap) { + dev_err(&pdev->dev, "failed to locate regmap\n"); + return -ENODEV; + } + + pwrkey->irq = platform_get_irq(pdev, 0); + if (pwrkey->irq < 0) { + dev_err(&pdev->dev, "failed to get irq\n"); + return pwrkey->irq; + } + + error = of_property_read_u32(pdev->dev.of_node, "reg", + &pwrkey->baseaddr); + if (error) + return error; + + error = regmap_read(pwrkey->regmap, pwrkey->baseaddr + PON_REV2, + &pwrkey->revision); + if (error) { + dev_err(&pdev->dev, "failed to set debounce: %d\n", error); + return error; + } + + 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, KEY_POWER); + + pwrkey->input->name = "pm8941_pwrkey"; + pwrkey->input->phys = "pm8941_pwrkey/input0"; + + 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 = regmap_update_bits(pwrkey->regmap, + pwrkey->baseaddr + PON_PULL_CTL, + PON_KPDPWR_PULL_UP, + pull_up ? PON_KPDPWR_PULL_UP : 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, + "pm8941_pwrkey", 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; + } + + 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); + + device_init_wakeup(&pdev->dev, 0); + unregister_reboot_notifier(&pwrkey->reboot_notifier); + + return 0; +} + +static const struct of_device_id pm8941_pwr_key_id_table[] = { + { .compatible = "qcom,pm8941-pwrkey" }, + { } +}; +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"); -- cgit 1.2.3-korg