2025cf9e19
Based on 1 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms and conditions of the gnu general public license version 2 as published by the free software foundation this program is distributed in the hope 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 extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference in 263 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Allison Randal <allison@lohutok.net> Reviewed-by: Alexios Zavras <alexios.zavras@intel.com> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190529141901.208660670@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
88 lines
2 KiB
C
88 lines
2 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Power off driver for ams AS3722 device.
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*
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* Copyright (c) 2013, NVIDIA CORPORATION. All rights reserved.
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*
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* Author: Laxman Dewangan <ldewangan@nvidia.com>
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*/
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#include <linux/mfd/as3722.h>
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#include <linux/module.h>
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#include <linux/of.h>
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#include <linux/of_device.h>
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#include <linux/platform_device.h>
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#include <linux/slab.h>
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struct as3722_poweroff {
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struct device *dev;
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struct as3722 *as3722;
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};
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static struct as3722_poweroff *as3722_pm_poweroff;
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static void as3722_pm_power_off(void)
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{
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int ret;
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if (!as3722_pm_poweroff) {
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pr_err("AS3722 poweroff is not initialised\n");
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return;
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}
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ret = as3722_update_bits(as3722_pm_poweroff->as3722,
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AS3722_RESET_CONTROL_REG, AS3722_POWER_OFF, AS3722_POWER_OFF);
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if (ret < 0)
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dev_err(as3722_pm_poweroff->dev,
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"RESET_CONTROL_REG update failed, %d\n", ret);
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}
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static int as3722_poweroff_probe(struct platform_device *pdev)
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{
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struct as3722_poweroff *as3722_poweroff;
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struct device_node *np = pdev->dev.parent->of_node;
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if (!np)
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return -EINVAL;
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if (!of_property_read_bool(np, "ams,system-power-controller"))
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return 0;
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as3722_poweroff = devm_kzalloc(&pdev->dev, sizeof(*as3722_poweroff),
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GFP_KERNEL);
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if (!as3722_poweroff)
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return -ENOMEM;
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as3722_poweroff->as3722 = dev_get_drvdata(pdev->dev.parent);
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as3722_poweroff->dev = &pdev->dev;
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as3722_pm_poweroff = as3722_poweroff;
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if (!pm_power_off)
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pm_power_off = as3722_pm_power_off;
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return 0;
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}
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static int as3722_poweroff_remove(struct platform_device *pdev)
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{
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if (pm_power_off == as3722_pm_power_off)
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pm_power_off = NULL;
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as3722_pm_poweroff = NULL;
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return 0;
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}
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static struct platform_driver as3722_poweroff_driver = {
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.driver = {
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.name = "as3722-power-off",
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},
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.probe = as3722_poweroff_probe,
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.remove = as3722_poweroff_remove,
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};
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module_platform_driver(as3722_poweroff_driver);
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MODULE_DESCRIPTION("Power off driver for ams AS3722 PMIC Device");
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MODULE_ALIAS("platform:as3722-power-off");
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MODULE_AUTHOR("Laxman Dewangan <ldewangan@nvidia.com>");
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MODULE_LICENSE("GPL v2");
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