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Commit d17799f9 authored by chenhui zhao's avatar chenhui zhao Committed by Scott Wood
Browse files

powerpc/rcpm: add RCPM driver 



There is a RCPM (Run Control/Power Management) in Freescale QorIQ
series processors. The device performs tasks associated with device
run control and power management.

The driver implements some features: mask/unmask irq, enter/exit low
power states, freeze time base, etc.

Signed-off-by: default avatarChenhui Zhao <chenhui.zhao@freescale.com>
Signed-off-by: default avatarTang Yuantian <Yuantian.Tang@freescale.com>
[scottwood: remove __KERNEL__ ifdef]
Signed-off-by: default avatarScott Wood <oss@buserror.net>
parent e7affb1d

arch/powerpc/include/asm/cputhreads.h

+1 −0
Original line number Diff line number Diff line
@@ -103,6 +103,7 @@ static inline u32 get_tensr(void) 
	return 1;

}



void book3e_stop_thread(int thread);



#endif /* _ASM_POWERPC_CPUTHREADS_H */

arch/powerpc/include/asm/fsl_pm.h

0 → 100644
+51 −0
Original line number Diff line number Diff line 
/*

 * Support Power Management

 *

 * Copyright 2014-2015 Freescale Semiconductor Inc.

 *

 * This program is free software; you can redistribute  it and/or modify it

 * under  the terms of  the GNU General  Public License as published by the

 * Free Software Foundation;  either version 2 of the  License, or (at your

 * option) any later version.

 */

#ifndef __PPC_FSL_PM_H

#define __PPC_FSL_PM_H



#define E500_PM_PH10	1

#define E500_PM_PH15	2

#define E500_PM_PH20	3

#define E500_PM_PH30	4

#define E500_PM_DOZE	E500_PM_PH10

#define E500_PM_NAP	E500_PM_PH15



#define PLAT_PM_SLEEP	20

#define PLAT_PM_LPM20	30



#define FSL_PM_SLEEP		(1 << 0)

#define FSL_PM_DEEP_SLEEP	(1 << 1)



struct fsl_pm_ops {

	/* mask pending interrupts to the RCPM from MPIC */

	void (*irq_mask)(int cpu);



	/* unmask pending interrupts to the RCPM from MPIC */

	void (*irq_unmask)(int cpu);

	void (*cpu_enter_state)(int cpu, int state);

	void (*cpu_exit_state)(int cpu, int state);

	void (*cpu_up_prepare)(int cpu);

	void (*cpu_die)(int cpu);

	int (*plat_enter_sleep)(void);

	void (*freeze_time_base)(bool freeze);



	/* keep the power of IP blocks during sleep/deep sleep */

	void (*set_ip_power)(bool enable, u32 mask);



	/* get platform supported power management modes */

	unsigned int (*get_pm_modes)(void);

};



extern const struct fsl_pm_ops *qoriq_pm_ops;



int __init fsl_rcpm_init(void);



#endif /* __PPC_FSL_PM_H */

arch/powerpc/kernel/head_64.S

+19 −0
Original line number Diff line number Diff line
@@ -181,6 +181,25 @@ exception_marker: 
#endif



#ifdef CONFIG_PPC_BOOK3E

/*

 * stop a thread in the same core

 * input parameter:

 * r3 = the thread physical id

 */

_GLOBAL(book3e_stop_thread)

	cmpi	0, r3, 0

	beq	10f

	cmpi	0, r3, 1

	beq	10f

	/* If the thread id is invalid, just exit. */

	b	13f

10:

	li	r4, 1

	sld	r4, r4, r3

	mtspr	SPRN_TENC, r4

13:

	blr



_GLOBAL(fsl_secondary_thread_init)

	mfspr	r4,SPRN_BUCSR

arch/powerpc/platforms/85xx/Kconfig

+1 −0
Original line number Diff line number Diff line
@@ -8,6 +8,7 @@ menuconfig FSL_SOC_BOOKE 
	select FSL_PCI if PCI

	select SERIAL_8250_EXTENDED if SERIAL_8250

	select SERIAL_8250_SHARE_IRQ if SERIAL_8250

	select FSL_CORENET_RCPM if PPC_E500MC

	default y



if FSL_SOC_BOOKE

arch/powerpc/platforms/85xx/common.c

+3 −0
Original line number Diff line number Diff line
@@ -9,11 +9,14 @@ 
#include <linux/of_irq.h>

#include <linux/of_platform.h>



#include <asm/fsl_pm.h>

#include <soc/fsl/qe/qe.h>

#include <sysdev/cpm2_pic.h>



#include "mpc85xx.h"



const struct fsl_pm_ops *qoriq_pm_ops;



static const struct of_device_id mpc85xx_common_ids[] __initconst = {

	{ .type = "soc", },

	{ .compatible = "soc", },