cpu/hotplug: Provide dynamic range for prepare stage

Mathieu reported that the LTTNG modules are broken as of 4.10-rc1 due to
the removal of the cpu hotplug notifiers.

Usually I don't care much about out of tree modules, but LTTNG is widely
used in distros. There are two ways to solve that:

1) Reserve a hotplug state for LTTNG

2) Add a dynamic range for the prepare states.

While #1 is the simplest solution, #2 is the proper one as we can convert
in tree users, which do not care about ordering, to the dynamic range as
well.

Add a dynamic range which allows LTTNG to request states in the prepare
stage.

Reported-and-tested-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Sebastian Sewior <bigeasy@linutronix.de>
Cc: Steven Rostedt <rostedt@goodmis.org>
Link: http://lkml.kernel.org/r/alpine.DEB.2.20.1701101353010.3401@nanos
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

path: root/include/dt-bindings/mfd/st-lpc.h

/*
 * This header provides shared DT/Driver defines for ST's LPC device
 *
 * Copyright (C) 2014 STMicroelectronics -- All Rights Reserved
 *
 * Author: Lee Jones <lee.jones@linaro.org> for STMicroelectronics
 */

#ifndef __DT_BINDINGS_ST_LPC_H__
#define __DT_BINDINGS_ST_LPC_H__

#define ST_LPC_MODE_RTC		0
#define ST_LPC_MODE_WDT		1
#define ST_LPC_MODE_CLKSRC	2

#endif /* __DT_BINDINGS_ST_LPC_H__ */