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eeepc-laptop: get the right value for CMSG

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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 <corentincj@iksaif.net>
Signed-off-by: Len Brown <len.brown@intel.com>
This commit is contained in:
Corentin Chary 2009-06-25 13:25:41 +02:00 committed by Len Brown
parent f36509e724
commit dbfa3ba90d
1 changed files with 23 additions and 0 deletions
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23
drivers/platform/x86/eeepc-laptop.c
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@ -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);
}