Add platform-neutral chipset interface

...since x86_power_in_S0() is a terrible function to have implemented
for gaia chipsets, and I need to add more detectable states for lid
switch handling anyway.

Signed-off-by: Randall Spangler <rspangler@chromium.org>

BUG=none
TEST=none

Change-Id: I0c90c6875b27d1bf23f093e88e34eabf2a8c86e4

2 files changed, 32 insertions, 3 deletions

diff --git a/include/chipset.h b/include/chipset.h
new file mode 100644
index 0000000000..8e126ccddc
--- /dev/null
+++ b/include/chipset.h
@@ -0,0 +1,32 @@
+/* Copyright (c) 2012 The Chromium OS Authors. All rights reserved.
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+/* Chipset module for Chrome EC.
+ *
+ * This is intended to be a platform/chipset-neutral interface, implemented by
+ * all main chipsets (x86, gaia, etc.). */
+
+#ifndef __CROS_EC_CHIPSET_H
+#define __CROS_EC_CHIPSET_H
+
+#include "common.h"
+
+/* Chipset state.
+ *
+ * Note that this is a non-exhaustive list of states which the main chipset can
+ * be in, and is potentially one-to-many for real, underlying chipset states.
+ * That's why chipset_in_state() asks "Is the chipset in something
+ * approximating this state?" and not "Tell me what state the chipset is in and
+ * I'll compare it myself with the state(s) I want." */
+enum chipset_state {
+	CHIPSET_STATE_SOFT_OFF,   /* Soft off (S5) */
+	CHIPSET_STATE_SUSPEND,    /* Suspend (S3) */
+	CHIPSET_STATE_ON,         /* On (S0) */
+};
+
+/* Returns non-zero if the chipset is in the specified state. */
+int chipset_in_state(enum chipset_state in_state);
+
+#endif  /* __CROS_EC_CHIPSET_H */
diff --git a/include/x86_power.h b/include/x86_power.h
index fc0d812413..41191b4d3f 100644
--- a/include/x86_power.h
+++ b/include/x86_power.h
@@ -17,9 +17,6 @@ int x86_power_init(void);
 /* Interrupt handler for input GPIOs */
 void x86_power_interrupt(enum gpio_signal signal);
 
-/* Returns true if the system is in S0. */
-int x86_power_in_S0(void);
-
 /* Informs the power module that the CPU has overheated (too_hot=1) or is
  * no longer too hot (too_hot=0). */
 void x86_power_cpu_overheated(int too_hot);