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348fde771c
Use device life-cycle managed register function to simplify probe and exit paths. Signed-off-by: Andrew Davis <afd@ti.com> Link: https://lore.kernel.org/r/20240212162831.67838-16-afd@ti.com Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
76 lines
1.8 KiB
C
76 lines
1.8 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/platform_device.h>
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#include <linux/reboot.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 int as3722_pm_power_off(struct sys_off_data *data)
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{
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struct as3722_poweroff *as3722_pm_poweroff = data->cb_data;
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int ret;
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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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return NOTIFY_DONE;
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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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return devm_register_sys_off_handler(as3722_poweroff->dev,
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SYS_OFF_MODE_POWER_OFF,
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SYS_OFF_PRIO_DEFAULT,
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as3722_pm_power_off,
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as3722_poweroff);
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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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};
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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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