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>

1 files changed, 4 insertions, 0 deletions

diff --git a/drivers/platform/x86/hp-wmi.c b/drivers/platform/x86/hp-wmi.c
index 2179c03b94de..be9227dd82be 100644
--- 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) {