[13/15] eeepc-laptop: get the right value for CMSG

Commit Message

Corentin Chary June 16, 2009, 7:28 p.m. UTC

CMSG is an ACPI method used to find features available on
an Eee PC. But some features are never repported, even if present.

If the getter of a feature is present, this patch will set
the corresponding bit in cmsg.

Signed-off-by: Corentin Chary <[e-mail]>
---
 drivers/platform/x86/eeepc-laptop.c |   23 +++++++++++++++++++++++
 1 files changed, 23 insertions(+), 0 deletions(-)

Patch

diff --git a/drivers/platform/x86/eeepc-laptop.c b/drivers/platform/x86/eeepc-laptop.c
index d466139..789710a 100644
--- a/drivers/platform/x86/eeepc-laptop.c
+++ b/drivers/platform/x86/eeepc-laptop.c
@@ -490,6 +490,28 @@  static int eeepc_setkeycode(struct input_dev *dev, int scancode, int keycode)
 	return -EINVAL;
 }
 
+static void cmsg_quirk(int cm, const char *name)
+{
+	int dummy;
+
+	/* Some BIOSes do not report cm although it is avaliable.
+	   Check if cm_getv[cm] works and, if yes, assume cm should be set. */
+	if (!(ehotk->cm_supported & (1 << cm))
+	    && !read_acpi_int(ehotk->handle, cm_getv[cm], &dummy)) {
+		pr_info("%s (%x) not reported by BIOS,"
+			" enabling anyway\n", name, 1 << cm);
+		ehotk->cm_supported |= 1 << cm;
+	}
+}
+
+static void cmsg_quirks(void)
+{
+	cmsg_quirk(CM_ASL_LID, "LID");
+	cmsg_quirk(CM_ASL_TYPE, "TYPE");
+	cmsg_quirk(CM_ASL_PANELPOWER, "PANELPOWER");
+	cmsg_quirk(CM_ASL_TPD, "TPD");
+}
+
 static int eeepc_hotk_check(void)
 {
 	const struct key_entry *key;
@@ -513,6 +535,7 @@  static int eeepc_hotk_check(void)
 			pr_err("Get control methods supported failed\n");
 			return -ENODEV;
 		} else {
+			cmsg_quirks();
 			pr_info("Get control methods supported: 0x%x\n",
 				ehotk->cm_supported);
 		}