hp-wmi: Add support for SMBus hotkeys

Limit patch to only known effected models.

diff --git a/drivers/platform/x86/hp-wmi.c b/drivers/platform/x86/hp-wmi.c
index 9e098f4..e368d87 100644 (file)
--- a/drivers/platform/x86/hp-wmi.c
+++ b/drivers/platform/x86/hp-wmi.c
@@ -35,6 +35,7 @@
 #include <linux/input/sparse-keymap.h>
 #include <linux/platform_device.h>
 #include <linux/acpi.h>
+#include <linux/dmi.h>
 #include <linux/rfkill.h>
 #include <linux/string.h>
 
@@ -865,6 +866,17 @@ static int hp_wmi_resume_handler(struct device *device)
        return 0;
 }
 
+static struct dmi_system_id __initdata tx2_dmi_table[] = {
+       {
+               .ident = "tx2",
+               .matches = {
+                       DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
+                       DMI_MATCH(DMI_PRODUCT_NAME, "tx2"),
+               },
+       },
+       { }
+};
+
 static int __init hp_wmi_init(void)
 {
        int err;
@@ -876,8 +888,10 @@ static int __init hp_wmi_init(void)
                if (err)
                        return err;
 
-               //Enable magic for hotkeys that run on the SMBus
-               ec_write(0xe6,0x6e);
+               if (dmi_check_system(tx2_dmi_table)) {
+                       pr_info("Configuring EC to enable bezel buttons\n");
+                       ec_write(0xe6,0x6e);
+               }
        }
 
        if (bios_capable) {