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105 lines
2.4 KiB
105 lines
2.4 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
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/* |
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* driver for powerbutton on IBM cell blades |
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* |
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* (C) Copyright IBM Corp. 2005-2008 |
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* |
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* Author: Christian Krafft <[email protected]> |
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*/ |
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#include <linux/input.h> |
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#include <linux/module.h> |
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#include <linux/platform_device.h> |
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#include <asm/pmi.h> |
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#include <asm/prom.h> |
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static struct input_dev *button_dev; |
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static struct platform_device *button_pdev; |
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static void cbe_powerbutton_handle_pmi(pmi_message_t pmi_msg) |
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{ |
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BUG_ON(pmi_msg.type != PMI_TYPE_POWER_BUTTON); |
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input_report_key(button_dev, KEY_POWER, 1); |
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input_sync(button_dev); |
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input_report_key(button_dev, KEY_POWER, 0); |
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input_sync(button_dev); |
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} |
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static struct pmi_handler cbe_pmi_handler = { |
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.type = PMI_TYPE_POWER_BUTTON, |
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.handle_pmi_message = cbe_powerbutton_handle_pmi, |
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}; |
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static int __init cbe_powerbutton_init(void) |
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{ |
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int ret = 0; |
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struct input_dev *dev; |
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if (!of_machine_is_compatible("IBM,CBPLUS-1.0")) { |
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printk(KERN_ERR "%s: Not a cell blade.\n", __func__); |
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ret = -ENODEV; |
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goto out; |
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} |
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dev = input_allocate_device(); |
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if (!dev) { |
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ret = -ENOMEM; |
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printk(KERN_ERR "%s: Not enough memory.\n", __func__); |
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goto out; |
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} |
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set_bit(EV_KEY, dev->evbit); |
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set_bit(KEY_POWER, dev->keybit); |
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dev->name = "Power Button"; |
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dev->id.bustype = BUS_HOST; |
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/* this makes the button look like an acpi power button |
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* no clue whether anyone relies on that though */ |
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dev->id.product = 0x02; |
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dev->phys = "LNXPWRBN/button/input0"; |
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button_pdev = platform_device_register_simple("power_button", 0, NULL, 0); |
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if (IS_ERR(button_pdev)) { |
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ret = PTR_ERR(button_pdev); |
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goto out_free_input; |
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} |
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dev->dev.parent = &button_pdev->dev; |
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ret = input_register_device(dev); |
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if (ret) { |
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printk(KERN_ERR "%s: Failed to register device\n", __func__); |
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goto out_free_pdev; |
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} |
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button_dev = dev; |
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ret = pmi_register_handler(&cbe_pmi_handler); |
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if (ret) { |
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printk(KERN_ERR "%s: Failed to register with pmi.\n", __func__); |
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goto out_free_pdev; |
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} |
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goto out; |
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out_free_pdev: |
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platform_device_unregister(button_pdev); |
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out_free_input: |
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input_free_device(dev); |
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out: |
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return ret; |
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} |
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static void __exit cbe_powerbutton_exit(void) |
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{ |
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pmi_unregister_handler(&cbe_pmi_handler); |
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platform_device_unregister(button_pdev); |
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input_free_device(button_dev); |
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} |
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module_init(cbe_powerbutton_init); |
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module_exit(cbe_powerbutton_exit); |
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MODULE_LICENSE("GPL"); |
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MODULE_AUTHOR("Christian Krafft <[email protected]>");
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