1 files changed, 167 insertions, 0 deletions
diff --git a/include/linux/irqchip/msm-mpm-irq.h b/include/linux/irqchip/msm-mpm-irq.h
new file mode 100644
index 000000000000..118153ee8c8b
--- /dev/null
+++ b/include/linux/irqchip/msm-mpm-irq.h
@@ -0,0 +1,167 @@
+/* Copyright (c) 2010-2015, The Linux Foundation. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 and
+ * only version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ */
+
+#ifndef __MSM_MPM_IRQ_H
+#define __MSM_MPM_IRQ_H
+
+#include <linux/types.h>
+#include <linux/list.h>
+
+#define MSM_MPM_NR_MPM_IRQS  64
+
+#if defined(CONFIG_MSM_MPM_OF)
+/**
+ * msm_mpm_enable_pin() -  Enable/Disable a MPM pin for idle wakeups.
+ *
+ * @pin:	MPM pin to set
+ * @enable:	enable/disable the pin
+ *
+ * returns 0 on success or errorno
+ *
+ * Drivers can call the function to configure MPM pins for wakeup from idle low
+ * power modes. The API provides a direct access to the configuring MPM pins
+ * that are not connected to a IRQ/GPIO
+ */
+int msm_mpm_enable_pin(unsigned int pin, unsigned int enable);
+
+/**
+ * msm_mpm_set_pin_wake() -  Enable/Disable a MPM pin during suspend
+ *
+ * @pin:	MPM pin to set
+ * @enable:	enable/disable the pin as wakeup
+ *
+ * returns 0 on success or errorno
+ *
+ * Drivers can call the function to configure MPM pins for wakeup from suspend
+ * low power modes. The API provides a direct access to the configuring MPM pins
+ * that are not connected to a IRQ/GPIO
+ */
+int msm_mpm_set_pin_wake(unsigned int pin, unsigned int on);
+/**
+ * msm_mpm_set_pin_type() - Set the flowtype of a MPM pin.
+ *
+ * @pin:	MPM pin to configure
+ * @flow_type:	flowtype of the MPM pin.
+ *
+ * returns 0 on success or errorno
+ *
+ * Drivers can call the function to configure the flowtype of the MPM pins
+ * The API provides a direct access to the configuring MPM pins that are not
+ * connected to a IRQ/GPIO
+ */
+int msm_mpm_set_pin_type(unsigned int pin, unsigned int flow_type);
+/**
+ * msm_mpm_irqs_detectable() - Check if active irqs can be monitored by MPM
+ *
+ * @from_idle: indicates if the sytem is entering low power mode as a part of
+ *		suspend/idle task.
+ *
+ * returns true if all active interrupts can be monitored by the MPM
+ *
+ * Low power management code calls into this API to check if all active
+ * interrupts can be monitored by MPM and choose a level such that all active
+ * interrupts can wake the system up from low power mode.
+ */
+bool msm_mpm_irqs_detectable(bool from_idle);
+/**
+ * msm_mpm_gpio_detectable() - Check if active gpio irqs can be monitored by
+ *				MPM
+ *
+ * @from_idle: indicates if the sytem is entering low power mode as a part of
+ *		suspend/idle task.
+ *
+ * returns true if all active GPIO interrupts can be monitored by the MPM
+ *
+ * Low power management code calls into this API to check if all active
+ * GPIO interrupts can be monitored by MPM and choose a level such that all
+ * active interrupts can wake the system up from low power mode.
+ */
+bool msm_mpm_gpio_irqs_detectable(bool from_idle);
+/**
+ * msm_mpm_enter_sleep() -Called from PM code before entering low power mode
+ *
+ * @sclk_count: wakeup time in sclk counts for programmed RPM wakeup
+ * @from_idle: indicates if the sytem is entering low power mode as a part of
+ *		suspend/idle task.
+ * @cpumask: the next cpu to wakeup.
+ *
+ * Low power management code calls into this API to configure the MPM to
+ * monitor the active irqs before going to sleep.
+ */
+void msm_mpm_enter_sleep(uint64_t sclk_count, bool from_idle,
+		const struct cpumask *cpumask);
+/**
+ * msm_mpm_exit_sleep() -Called from PM code after resuming from low power mode
+ *
+ * @from_idle: indicates if the sytem is entering low power mode as a part of
+ *		suspend/idle task.
+ *
+ * Low power management code calls into this API to query the MPM for the
+ * wakeup source and retriggering the appropriate interrupt.
+ */
+void msm_mpm_exit_sleep(bool from_idle);
+/**
+ * of_mpm_init() - Device tree initialization function
+ *
+ * The initialization function is called after * GPIO/GIC device initialization
+ * routines are called and before any device irqs are requested. MPM driver
+ * keeps track of all enabled/wakeup interrupts in the system to be able to
+ * configure MPM when entering a system wide low power mode. The MPM is a
+ * alway-on low power hardware block that monitors 64 wakeup interrupts when the
+ * system is in a low power mode. The initialization function constructs the MPM
+ * mapping between the IRQs and the MPM pin based on data in the device tree.
+ */
+void of_mpm_init(void);
+#else
+static inline int msm_mpm_enable_irq(unsigned int irq, unsigned int enable)
+{ return -ENODEV; }
+static inline int msm_mpm_set_irq_wake(unsigned int irq, unsigned int on)
+{ return -ENODEV; }
+static inline int msm_mpm_set_irq_type(unsigned int irq, unsigned int flow_type)
+{ return -ENODEV; }
+static inline int msm_mpm_enable_pin(unsigned int pin, unsigned int enable)
+{ return -ENODEV; }
+static inline int msm_mpm_set_pin_wake(unsigned int pin, unsigned int on)
+{ return -ENODEV; }
+static inline int msm_mpm_set_pin_type(unsigned int pin,
+				       unsigned int flow_type)
+{ return -ENODEV; }
+static inline bool msm_mpm_irqs_detectable(bool from_idle)
+{ return false; }
+static inline bool msm_mpm_gpio_irqs_detectable(bool from_idle)
+{ return false; }
+static inline void msm_mpm_enter_sleep(uint64_t sclk_count, bool from_idle,
+		const struct cpumask *cpumask) {}
+static inline void msm_mpm_exit_sleep(bool from_idle) {}
+static inline void of_mpm_init(void) {}
+#endif
+#ifdef CONFIG_MSM_MPM_OF
+/** msm_mpm_suspend_prepare() - Called at prepare_late() op during suspend
+ *
+ *
+ *  When called the MPM driver checks if the wakeup interrupts can be monitored
+ *  by MPM hardware and program them accordingly. If wake up interrupts cannot
+ *  be monitored then it disallows system low power modes.
+ */
+void msm_mpm_suspend_prepare(void);
+/** msm_mpm_suspend_wake - Called during wake() op in suspend.
+ *
+ *  When called MPM drivers sets the vote for system low power modes depending
+ *  on the active interrupts.
+ */
+void msm_mpm_suspend_wake(void);
+#else
+static inline void msm_mpm_suspend_prepare(void) {}
+static inline void msm_mpm_suspend_wake(void) {}
+#endif
+#endif /* __MSM_MPM_IRQ_H */