powerpc/cell: Add support for power button of future IBM cell blades (4795b780) · Commits · 戴 / test

arch/powerpc/platforms/cell/Kconfig

+8 −0

Original line number	Diff line number	Diff line
		@@ -91,6 +91,14 @@ config PPC_IBM_CELL_RESETBUTTON
		Support Pinhole Resetbutton on IBM Cell blades.
		This adds a method to trigger system reset via front panel pinhole button.

		config PPC_IBM_CELL_POWERBUTTON
		tristate "IBM Cell Blade power button"
		depends on PPC_IBM_CELL_BLADE && PPC_PMI && INPUT_EVDEV
		default y
		help
		Support Powerbutton on IBM Cell blades.
		This will enable the powerbutton as an input device.

		config CBE_THERM
		tristate "CBE thermal support"
		default m

arch/powerpc/platforms/cell/Makefile

+2 −0

Original line number	Diff line number	Diff line
		@@ -10,6 +10,8 @@ obj-$(CONFIG_CBE_CPUFREQ) += cbe-cpufreq.o
		cbe-cpufreq-y += cbe_cpufreq_pervasive.o cbe_cpufreq.o
		obj-$(CONFIG_CBE_CPUFREQ_SPU_GOVERNOR) += cpufreq_spudemand.o

		obj-$(CONFIG_PPC_IBM_CELL_POWERBUTTON) += cbe_powerbutton.o

		ifeq ($(CONFIG_SMP),y)
		obj-$(CONFIG_PPC_CELL_NATIVE) += smp.o
		endif

arch/powerpc/platforms/cell/cbe_powerbutton.c

0 → 100644

+117 −0

Original line number	Diff line number	Diff line
		/*
		* driver for powerbutton on IBM cell blades
		*
		* (C) Copyright IBM Corp. 2005-2008
		*
		* Author: Christian Krafft <krafft@de.ibm.com>
		*
		* This program is free software; you can redistribute it and/or modify
		* it under the terms of the GNU General Public License as published by
		* the Free Software Foundation; either version 2, or (at your option)
		* any later version.
		*
		* 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.
		*
		* You should have received a copy of the GNU General Public License
		* along with this program; if not, write to the Free Software
		* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
		*/

		#include <linux/input.h>
		#include <linux/platform_device.h>
		#include <asm/pmi.h>
		#include <asm/prom.h>

		static struct input_dev *button_dev;
		static struct platform_device *button_pdev;

		static void cbe_powerbutton_handle_pmi(pmi_message_t pmi_msg)
		{
		BUG_ON(pmi_msg.type != PMI_TYPE_POWER_BUTTON);

		input_report_key(button_dev, KEY_POWER, 1);
		input_sync(button_dev);
		input_report_key(button_dev, KEY_POWER, 0);
		input_sync(button_dev);
		}

		static struct pmi_handler cbe_pmi_handler = {
		.type = PMI_TYPE_POWER_BUTTON,
		.handle_pmi_message = cbe_powerbutton_handle_pmi,
		};

		static int __init cbe_powerbutton_init(void)
		{
		int ret = 0;
		struct input_dev *dev;

		if (!machine_is_compatible("IBM,CBPLUS-1.0")) {
		printk(KERN_ERR "%s: Not a cell blade.\n", __func__);
		ret = -ENODEV;
		goto out;
		}

		dev = input_allocate_device();
		if (!dev) {
		ret = -ENOMEM;
		printk(KERN_ERR "%s: Not enough memory.\n", __func__);
		goto out;
		}

		set_bit(EV_KEY, dev->evbit);
		set_bit(KEY_POWER, dev->keybit);

		dev->name = "Power Button";
		dev->id.bustype = BUS_HOST;

		/* this makes the button look like an acpi power button
		* no clue whether anyone relies on that though */
		dev->id.product = 0x02;
		dev->phys = "LNXPWRBN/button/input0";

		button_pdev = platform_device_register_simple("power_button", 0, NULL, 0);
		if (IS_ERR(button_pdev)) {
		ret = PTR_ERR(button_pdev);
		goto out_free_input;
		}

		dev->dev.parent = &button_pdev->dev;
		ret = input_register_device(dev);
		if (ret) {
		printk(KERN_ERR "%s: Failed to register device\n", __func__);
		goto out_free_pdev;
		}

		button_dev = dev;

		ret = pmi_register_handler(&cbe_pmi_handler);
		if (ret) {
		printk(KERN_ERR "%s: Failed to register with pmi.\n", __func__);
		goto out_free_pdev;
		}

		goto out;

		out_free_pdev:
		platform_device_unregister(button_pdev);
		out_free_input:
		input_free_device(dev);
		out:
		return ret;
		}

		static void __exit cbe_powerbutton_exit(void)
		{
		pmi_unregister_handler(&cbe_pmi_handler);
		platform_device_unregister(button_pdev);
		input_free_device(button_dev);
		}

		module_init(cbe_powerbutton_init);
		module_exit(cbe_powerbutton_exit);

		MODULE_LICENSE("GPL");
		MODULE_AUTHOR("Christian Krafft <krafft@de.ibm.com>");

include/asm-powerpc/pmi.h

+1 −0

Original line number	Diff line number	Diff line
		@@ -30,6 +30,7 @@
		#ifdef __KERNEL__

		#define PMI_TYPE_FREQ_CHANGE 0x01
		#define PMI_TYPE_POWER_BUTTON 0x02
		#define PMI_READ_TYPE 0
		#define PMI_READ_DATA0 1
		#define PMI_READ_DATA1 2

Admin message