mirror of
https://github.com/torvalds/linux.git
synced 2024-11-07 04:32:03 +00:00
7b6d864b48
Preparing to move the parsing of reboot= to generic kernel code forces the change in reboot_mode handling to use the enum. [akpm@linux-foundation.org: fix arch/arm/mach-socfpga/socfpga.c] Signed-off-by: Robin Holt <holt@sgi.com> Cc: Russell King <rmk+kernel@arm.linux.org.uk> Cc: Russ Anderson <rja@sgi.com> Cc: Robin Holt <holt@sgi.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Guan Xuetao <gxt@mprc.pku.edu.cn> Acked-by: Russell King <rmk+kernel@arm.linux.org.uk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
67 lines
1.7 KiB
C
67 lines
1.7 KiB
C
/*
|
|
* omap2-restart.c - code common to all OMAP2xxx machines.
|
|
*
|
|
* Copyright (C) 2012 Texas Instruments
|
|
* Paul Walmsley
|
|
*
|
|
* 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.
|
|
*/
|
|
#include <linux/kernel.h>
|
|
#include <linux/init.h>
|
|
#include <linux/clk.h>
|
|
#include <linux/io.h>
|
|
|
|
#include "soc.h"
|
|
#include "common.h"
|
|
#include "prm2xxx.h"
|
|
|
|
/*
|
|
* reset_virt_prcm_set_ck, reset_sys_ck: pointers to the virt_prcm_set
|
|
* clock and the sys_ck. Used during the reset process
|
|
*/
|
|
static struct clk *reset_virt_prcm_set_ck, *reset_sys_ck;
|
|
|
|
/* Reboot handling */
|
|
|
|
/**
|
|
* omap2xxx_restart - Set DPLL to bypass mode for reboot to work
|
|
*
|
|
* Set the DPLL to bypass so that reboot completes successfully. No
|
|
* return value.
|
|
*/
|
|
void omap2xxx_restart(enum reboot_mode mode, const char *cmd)
|
|
{
|
|
u32 rate;
|
|
|
|
rate = clk_get_rate(reset_sys_ck);
|
|
clk_set_rate(reset_virt_prcm_set_ck, rate);
|
|
|
|
/* XXX Should save the cmd argument for use after the reboot */
|
|
|
|
omap2xxx_prm_dpll_reset(); /* never returns */
|
|
while (1);
|
|
}
|
|
|
|
/**
|
|
* omap2xxx_common_look_up_clks_for_reset - look up clocks needed for restart
|
|
*
|
|
* Some clocks need to be looked up in advance for the SoC restart
|
|
* operation to work - see omap2xxx_restart(). Returns -EINVAL upon
|
|
* error or 0 upon success.
|
|
*/
|
|
static int __init omap2xxx_common_look_up_clks_for_reset(void)
|
|
{
|
|
reset_virt_prcm_set_ck = clk_get(NULL, "virt_prcm_set");
|
|
if (IS_ERR(reset_virt_prcm_set_ck))
|
|
return -EINVAL;
|
|
|
|
reset_sys_ck = clk_get(NULL, "sys_ck");
|
|
if (IS_ERR(reset_sys_ck))
|
|
return -EINVAL;
|
|
|
|
return 0;
|
|
}
|
|
omap_core_initcall(omap2xxx_common_look_up_clks_for_reset);
|