1802d0beec
Based on 1 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms of the gnu general public license 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 extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference in 655 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Allison Randal <allison@lohutok.net> Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org> Reviewed-by: Richard Fontana <rfontana@redhat.com> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190527070034.575739538@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
68 lines
1.3 KiB
ArmAsm
68 lines
1.3 KiB
ArmAsm
/* SPDX-License-Identifier: GPL-2.0-only */
|
|
/*
|
|
* Copyright © 2014-2017 Broadcom
|
|
*/
|
|
|
|
#include <linux/linkage.h>
|
|
#include <asm/assembler.h>
|
|
|
|
#include "pm.h"
|
|
|
|
.text
|
|
.align 3
|
|
|
|
#define AON_CTRL_REG r10
|
|
#define DDR_PHY_STATUS_REG r11
|
|
|
|
/*
|
|
* r0: AON_CTRL base address
|
|
* r1: DDRY PHY PLL status register address
|
|
*/
|
|
ENTRY(brcmstb_pm_do_s2)
|
|
stmfd sp!, {r4-r11, lr}
|
|
mov AON_CTRL_REG, r0
|
|
mov DDR_PHY_STATUS_REG, r1
|
|
|
|
/* Flush memory transactions */
|
|
dsb
|
|
|
|
/* Cache DDR_PHY_STATUS_REG translation */
|
|
ldr r0, [DDR_PHY_STATUS_REG]
|
|
|
|
/* power down request */
|
|
ldr r0, =PM_S2_COMMAND
|
|
ldr r1, =0
|
|
str r1, [AON_CTRL_REG, #AON_CTRL_PM_CTRL]
|
|
ldr r1, [AON_CTRL_REG, #AON_CTRL_PM_CTRL]
|
|
str r0, [AON_CTRL_REG, #AON_CTRL_PM_CTRL]
|
|
ldr r0, [AON_CTRL_REG, #AON_CTRL_PM_CTRL]
|
|
|
|
/* Wait for interrupt */
|
|
wfi
|
|
nop
|
|
|
|
/* Bring MEMC back up */
|
|
1: ldr r0, [DDR_PHY_STATUS_REG]
|
|
ands r0, #1
|
|
beq 1b
|
|
|
|
/* Power-up handshake */
|
|
ldr r0, =1
|
|
str r0, [AON_CTRL_REG, #AON_CTRL_HOST_MISC_CMDS]
|
|
ldr r0, [AON_CTRL_REG, #AON_CTRL_HOST_MISC_CMDS]
|
|
|
|
ldr r0, =0
|
|
str r0, [AON_CTRL_REG, #AON_CTRL_PM_CTRL]
|
|
ldr r0, [AON_CTRL_REG, #AON_CTRL_PM_CTRL]
|
|
|
|
/* Return to caller */
|
|
ldr r0, =0
|
|
ldmfd sp!, {r4-r11, pc}
|
|
|
|
ENDPROC(brcmstb_pm_do_s2)
|
|
|
|
/* Place literal pool here */
|
|
.ltorg
|
|
|
|
ENTRY(brcmstb_pm_do_s2_sz)
|
|
.word . - brcmstb_pm_do_s2
|