hp-wmi: Add support for SMBus hotkeys

Several models of HP laptops using the same DSDT have hotkey buttons
that do not work until the EC is configured to enable them.

Signed-off-by: Kyle Evans <kvans32@gmail.com>
Signed-off-by: Matthew Garrett <matthew.garrett@nebula.com>

diff --git a/drivers/platform/x86/hp-wmi.c b/drivers/platform/x86/hp-wmi.c
index 2179c03..be9227d 100644 (file)
--- a/drivers/platform/x86/hp-wmi.c
+++ b/drivers/platform/x86/hp-wmi.c
@@ -138,6 +138,7 @@ static const struct key_entry hp_wmi_keymap[] = {
        { KE_KEY, 0x2142, { KEY_MEDIA } },
        { KE_KEY, 0x213b, { KEY_INFO } },
        { KE_KEY, 0x2169, { KEY_DIRECTION } },
+       { KE_KEY, 0x216a, { KEY_SETUP } },
        { KE_KEY, 0x231b, { KEY_HELP } },
        { KE_END, 0 }
 };
@@ -926,6 +927,9 @@ static int __init hp_wmi_init(void)
                err = hp_wmi_input_setup();
                if (err)
                        return err;
+               
+               //Enable magic for hotkeys that run on the SMBus
+               ec_write(0xe6,0x6e);
        }
 
        if (bios_capable) {