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bfe4cfa8ae
Build the APMU for r8a7791 even though SMP is disabled in the kernel config. Also initialize Suspend-to-RAM from pm-r8a7791.c to in the future cover both UP and SMP use cases of the APMU. Signed-off-by: Magnus Damm <damm+renesas@opensource.se> Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
74 lines
1.6 KiB
C
74 lines
1.6 KiB
C
/*
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* r8a7791 Power management support
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*
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* Copyright (C) 2014 Renesas Electronics Corporation
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* Copyright (C) 2011 Renesas Solutions Corp.
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* Copyright (C) 2011 Magnus Damm
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*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*/
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#include <linux/kernel.h>
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#include <linux/smp.h>
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#include <asm/io.h>
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#include "common.h"
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#include "pm-rcar.h"
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#include "r8a7791.h"
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#define RST 0xe6160000
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#define CA15BAR 0x0020
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#define CA15RESCNT 0x0040
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#define RAM 0xe6300000
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/* SYSC */
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#define SYSCIER 0x0c
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#define SYSCIMR 0x10
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#if defined(CONFIG_SMP)
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static void __init r8a7791_sysc_init(void)
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{
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void __iomem *base = rcar_sysc_init(0xe6180000);
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/* enable all interrupt sources, but do not use interrupt handler */
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iowrite32(0x0131000e, base + SYSCIER);
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iowrite32(0, base + SYSCIMR);
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}
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#else /* CONFIG_SMP */
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static inline void r8a7791_sysc_init(void) {}
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#endif /* CONFIG_SMP */
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void __init r8a7791_pm_init(void)
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{
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void __iomem *p;
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u32 bar;
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static int once;
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if (once++)
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return;
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/* RAM for jump stub, because BAR requires 256KB aligned address */
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p = ioremap_nocache(RAM, shmobile_boot_size);
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memcpy_toio(p, shmobile_boot_vector, shmobile_boot_size);
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iounmap(p);
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/* setup reset vectors */
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p = ioremap_nocache(RST, 0x63);
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bar = (RAM >> 8) & 0xfffffc00;
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writel_relaxed(bar, p + CA15BAR);
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writel_relaxed(bar | 0x10, p + CA15BAR);
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/* enable clocks to all CPUs */
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writel_relaxed((readl_relaxed(p + CA15RESCNT) & ~0x0f) | 0xa5a50000,
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p + CA15RESCNT);
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iounmap(p);
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r8a7791_sysc_init();
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shmobile_smp_apmu_suspend_init();
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}
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