From dbfa3ba90dfe353a56e107cff5bce9fb7976f06f Mon Sep 17 00:00:00 2001 From: Corentin Chary Date: Thu, 25 Jun 2009 13:25:41 +0200 Subject: [PATCH] eeepc-laptop: get the right value for CMSG 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 Signed-off-by: Len Brown --- drivers/platform/x86/eeepc-laptop.c | 23 +++++++++++++++++++++++ 1 file changed, 23 insertions(+) diff --git a/drivers/platform/x86/eeepc-laptop.c b/drivers/platform/x86/eeepc-laptop.c index 19cc9ae7db5a..f5d8473ea66f 100644 --- a/drivers/platform/x86/eeepc-laptop.c +++ b/drivers/platform/x86/eeepc-laptop.c @@ -553,6 +553,28 @@ 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; @@ -576,6 +598,7 @@ 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); } -- 2.20.1