apple-gmux: Obtain version info from indexed gmux

This patch extracts and displays version information from the indexed
gmux device as it is also done for the classic gmux device.

Signed-off-by: Bernhard Froemel <froemel@vmars.tuwien.ac.at>
Signed-off-by: Matthew Garrett <mjg@redhat.com>

diff --git a/drivers/platform/x86/apple-gmux.c b/drivers/platform/x86/apple-gmux.c
index dfb1a92..c9558d1 100644 (file)
--- a/drivers/platform/x86/apple-gmux.c
+++ b/drivers/platform/x86/apple-gmux.c
@@ -461,18 +461,22 @@ static int __devinit gmux_probe(struct pnp_dev *pnp,
        ver_release = gmux_read8(gmux_data, GMUX_PORT_VERSION_RELEASE);
        if (ver_major == 0xff && ver_minor == 0xff && ver_release == 0xff) {
                if (gmux_is_indexed(gmux_data)) {
+                       u32 version;
                        mutex_init(&gmux_data->index_lock);
                        gmux_data->indexed = true;
+                       version = gmux_read32(gmux_data,
+                               GMUX_PORT_VERSION_MAJOR);
+                       ver_major = (version >> 24) & 0xff;
+                       ver_minor = (version >> 16) & 0xff;
+                       ver_release = (version >> 8) & 0xff;
                } else {
                        pr_info("gmux device not present\n");
                        ret = -ENODEV;
                        goto err_release;
                }
-               pr_info("Found indexed gmux\n");
-       } else {
-               pr_info("Found gmux version %d.%d.%d\n", ver_major, ver_minor,
-                       ver_release);
        }
+       pr_info("Found gmux version %d.%d.%d [%s]\n", ver_major, ver_minor,
+               ver_release, (gmux_data->indexed ? "indexed" : "classic"));
 
        memset(&props, 0, sizeof(props));
        props.type = BACKLIGHT_PLATFORM;