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https://github.com/edk2-porting/linux-next.git
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f956a785a2
This creates a new SoC bus driver for the ARM Integrator family core modules to register the SoC bus and provide sysfs info for the core module. We delete the corresponding code from the Integrator machine and select this driver to get a clean result. Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
100 lines
2.2 KiB
C
100 lines
2.2 KiB
C
/*
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* linux/arch/arm/mach-integrator/core.c
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*
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* Copyright (C) 2000-2003 Deep Blue Solutions Ltd
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2, as
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* published by the Free Software Foundation.
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*/
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#include <linux/types.h>
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/device.h>
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#include <linux/export.h>
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#include <linux/spinlock.h>
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#include <linux/interrupt.h>
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#include <linux/irq.h>
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#include <linux/memblock.h>
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#include <linux/sched.h>
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#include <linux/smp.h>
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#include <linux/amba/bus.h>
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#include <linux/amba/serial.h>
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#include <linux/io.h>
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#include <linux/stat.h>
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#include <linux/of.h>
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#include <linux/of_address.h>
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#include <asm/mach-types.h>
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#include <asm/mach/time.h>
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#include <asm/pgtable.h>
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#include "hardware.h"
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#include "cm.h"
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#include "common.h"
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static DEFINE_RAW_SPINLOCK(cm_lock);
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static void __iomem *cm_base;
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/**
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* cm_get - get the value from the CM_CTRL register
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*/
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u32 cm_get(void)
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{
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return readl(cm_base + INTEGRATOR_HDR_CTRL_OFFSET);
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}
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/**
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* cm_control - update the CM_CTRL register.
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* @mask: bits to change
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* @set: bits to set
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*/
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void cm_control(u32 mask, u32 set)
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{
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unsigned long flags;
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u32 val;
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raw_spin_lock_irqsave(&cm_lock, flags);
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val = readl(cm_base + INTEGRATOR_HDR_CTRL_OFFSET) & ~mask;
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writel(val | set, cm_base + INTEGRATOR_HDR_CTRL_OFFSET);
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raw_spin_unlock_irqrestore(&cm_lock, flags);
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}
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void cm_clear_irqs(void)
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{
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/* disable core module IRQs */
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writel(0xffffffffU, cm_base + INTEGRATOR_HDR_IC_OFFSET +
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IRQ_ENABLE_CLEAR);
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}
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static const struct of_device_id cm_match[] = {
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{ .compatible = "arm,core-module-integrator"},
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{ },
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};
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void cm_init(void)
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{
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struct device_node *cm = of_find_matching_node(NULL, cm_match);
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if (!cm) {
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pr_crit("no core module node found in device tree\n");
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return;
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}
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cm_base = of_iomap(cm, 0);
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if (!cm_base) {
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pr_crit("could not remap core module\n");
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return;
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}
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cm_clear_irqs();
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}
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/*
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* We need to stop things allocating the low memory; ideally we need a
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* better implementation of GFP_DMA which does not assume that DMA-able
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* memory starts at zero.
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*/
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void __init integrator_reserve(void)
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{
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memblock_reserve(PHYS_OFFSET, __pa(swapper_pg_dir) - PHYS_OFFSET);
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}
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