On Fri, 2008-07-04 at 21:05 +0200, [EMAIL PROTECTED] wrote:
> plain text document attachment
> (0001-powerpc-cell-add-support-for-power-button-of-future.patch)
> This patch adds support for the power button on future IBM cell blades.
> It actually doesn't shut down the machine. Instead it exposes an
> input device /dev/input/event0 to userspace which sends KEY_POWER
> if power button has been pressed.
> haldaemon actually recognizes the button, so a plattform independent acpid
> replacement should handle it correctly.
>
> Signed-off-by: Christian Krafft <[EMAIL PROTECTED]>
> Signed-off-by: Arnd Bergmann <[EMAIL PROTECTED]>
> ---
And what if CONFIG_INPUT=n or m ?
Cheers,
Ben.
> arch/powerpc/platforms/cell/pervasive.c | 70
> ++++++++++++++++++++++++++++++-
> 1 files changed, 69 insertions(+), 1 deletions(-)
>
> diff --git a/arch/powerpc/platforms/cell/pervasive.c
> b/arch/powerpc/platforms/cell/pervasive.c
> index 8a3631c..e5bd08c 100644
> --- a/arch/powerpc/platforms/cell/pervasive.c
> +++ b/arch/powerpc/platforms/cell/pervasive.c
> @@ -24,8 +24,10 @@
> #undef DEBUG
>
> #include <linux/interrupt.h>
> +#include <linux/input.h>
> #include <linux/irq.h>
> #include <linux/percpu.h>
> +#include <linux/platform_device.h>
> #include <linux/types.h>
> #include <linux/kallsyms.h>
>
> @@ -40,6 +42,9 @@
>
> static int sysreset_hack;
>
> +static struct input_dev *button_dev;
> +static struct platform_device *button_pdev;
> +
> static void cbe_power_save(void)
> {
> unsigned long ctrl, thread_switch_control;
> @@ -105,10 +110,21 @@ static int cbe_system_reset_exception(struct pt_regs
> *regs)
> */
> if (sysreset_hack && (cpu = smp_processor_id()) == 0) {
> pmd = cbe_get_cpu_pmd_regs(cpu);
> - if (in_be64(&pmd->ras_esc_0) & 0xffff) {
> + if (in_be64(&pmd->ras_esc_0) & 0x0000ffff) {
> out_be64(&pmd->ras_esc_0, 0);
> return 0;
> }
> + if (in_be64(&pmd->ras_esc_0) & 0x00010000) {
> + out_be64(&pmd->ras_esc_0, 0);
> + if (!button_dev)
> + return 0;
> +
> + input_report_key(button_dev, KEY_POWER, 1);
> + input_sync(button_dev);
> + input_report_key(button_dev, KEY_POWER, 0);
> + input_sync(button_dev);
> + return 1;
> + }
> }
> break;
> #ifdef CONFIG_CBE_RAS
> @@ -155,3 +171,55 @@ void __init cbe_pervasive_init(void)
> ppc_md.power_save = cbe_power_save;
> ppc_md.system_reset_exception = cbe_system_reset_exception;
> }
> +
> +static int __init cbe_power_button_init(void)
> +{
> + int ret;
> + struct input_dev *dev;
> +
> + if (!sysreset_hack)
> + return 0;
> +
> + 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;
> + return ret;
> +
> +out_free_pdev:
> + platform_device_unregister(button_pdev);
> +out_free_input:
> + input_free_device(dev);
> +out:
> + return ret;
> +}
> +device_initcall(cbe_power_button_init);
> --
> 1.5.4.3
>
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