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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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dab6487e35
This enables the embedded GIC on all u8500 based hardware using DT. Acked-by: Linus Walleij <linus.walleij@linaro.org> Reviewed-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Lee Jones <lee.jones@linaro.org> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
139 lines
3.2 KiB
C
139 lines
3.2 KiB
C
/*
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* Copyright (C) ST-Ericsson SA 2010
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*
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* Author: Rabin Vincent <rabin.vincent@stericsson.com> for ST-Ericsson
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* Author: Lee Jones <lee.jones@linaro.org> for ST-Ericsson
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* License terms: GNU General Public License (GPL) version 2
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*/
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#include <linux/platform_device.h>
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#include <linux/io.h>
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#include <linux/clk.h>
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#include <linux/mfd/db8500-prcmu.h>
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#include <linux/mfd/db5500-prcmu.h>
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#include <linux/clksrc-dbx500-prcmu.h>
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#include <linux/sys_soc.h>
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#include <linux/err.h>
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#include <linux/slab.h>
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#include <linux/stat.h>
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#include <linux/of.h>
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#include <linux/of_irq.h>
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#include <asm/hardware/gic.h>
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#include <asm/mach/map.h>
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#include <mach/hardware.h>
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#include <mach/setup.h>
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#include <mach/devices.h>
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#include "clock.h"
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void __iomem *_PRCMU_BASE;
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static const struct of_device_id ux500_dt_irq_match[] = {
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{ .compatible = "arm,cortex-a9-gic", .data = gic_of_init, },
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{},
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};
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void __init ux500_init_irq(void)
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{
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void __iomem *dist_base;
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void __iomem *cpu_base;
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if (cpu_is_u5500()) {
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dist_base = __io_address(U5500_GIC_DIST_BASE);
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cpu_base = __io_address(U5500_GIC_CPU_BASE);
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} else if (cpu_is_u8500()) {
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dist_base = __io_address(U8500_GIC_DIST_BASE);
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cpu_base = __io_address(U8500_GIC_CPU_BASE);
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} else
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ux500_unknown_soc();
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#ifdef CONFIG_OF
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if (of_have_populated_dt())
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of_irq_init(ux500_dt_irq_match);
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else
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#endif
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gic_init(0, 29, dist_base, cpu_base);
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/*
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* Init clocks here so that they are available for system timer
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* initialization.
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*/
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if (cpu_is_u5500())
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db5500_prcmu_early_init();
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if (cpu_is_u8500())
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db8500_prcmu_early_init();
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clk_init();
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}
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static const char * __init ux500_get_machine(void)
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{
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return kasprintf(GFP_KERNEL, "DB%4x", dbx500_partnumber());
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}
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static const char * __init ux500_get_family(void)
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{
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return kasprintf(GFP_KERNEL, "ux500");
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}
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static const char * __init ux500_get_revision(void)
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{
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unsigned int rev = dbx500_revision();
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if (rev == 0x01)
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return kasprintf(GFP_KERNEL, "%s", "ED");
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else if (rev >= 0xA0)
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return kasprintf(GFP_KERNEL, "%d.%d",
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(rev >> 4) - 0xA + 1, rev & 0xf);
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return kasprintf(GFP_KERNEL, "%s", "Unknown");
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}
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static ssize_t ux500_get_process(struct device *dev,
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struct device_attribute *attr,
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char *buf)
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{
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if (dbx500_id.process == 0x00)
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return sprintf(buf, "Standard\n");
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return sprintf(buf, "%02xnm\n", dbx500_id.process);
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}
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static void __init soc_info_populate(struct soc_device_attribute *soc_dev_attr,
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const char *soc_id)
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{
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soc_dev_attr->soc_id = soc_id;
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soc_dev_attr->machine = ux500_get_machine();
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soc_dev_attr->family = ux500_get_family();
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soc_dev_attr->revision = ux500_get_revision();
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}
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struct device_attribute ux500_soc_attr =
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__ATTR(process, S_IRUGO, ux500_get_process, NULL);
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struct device * __init ux500_soc_device_init(const char *soc_id)
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{
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struct device *parent;
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struct soc_device *soc_dev;
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struct soc_device_attribute *soc_dev_attr;
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soc_dev_attr = kzalloc(sizeof(*soc_dev_attr), GFP_KERNEL);
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if (!soc_dev_attr)
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return ERR_PTR(-ENOMEM);
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soc_info_populate(soc_dev_attr, soc_id);
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soc_dev = soc_device_register(soc_dev_attr);
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if (IS_ERR_OR_NULL(soc_dev)) {
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kfree(soc_dev_attr);
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return NULL;
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}
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parent = soc_device_to_device(soc_dev);
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if (!IS_ERR_OR_NULL(parent))
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device_create_file(parent, &ux500_soc_attr);
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return parent;
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}
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