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https://github.com/torvalds/linux
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0ddf855af6
An earlier change prevented User Interface Boards (UIBs) from being initialised on boards which did not support them. This change had the undesired effect of reordering the UIB initialisation calls with I2C registration. Here we ensure UIBs are only setup after all required infrastructure is already in place. Acked-by: Linus Walleij <linus.walleij@linaro.org> Acked-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Lee Jones <lee.jones@linaro.org>
159 lines
3.9 KiB
C
159 lines
3.9 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/mfd/db8500-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 <linux/irq.h>
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#include <linux/platform_data/clk-ux500.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 "board-mop500.h"
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void __iomem *_PRCMU_BASE;
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/*
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* FIXME: Should we set up the GPIO domain here?
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*
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* The problem is that we cannot put the interrupt resources into the platform
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* device until the irqdomain has been added. Right now, we set the GIC interrupt
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* domain from init_irq(), then load the gpio driver from
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* core_initcall(nmk_gpio_init) and add the platform devices from
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* arch_initcall(customize_machine).
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*
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* This feels fragile because it depends on the gpio device getting probed
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* _before_ any device uses the gpio interrupts.
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*/
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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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gic_arch_extn.flags = IRQCHIP_SKIP_SET_WAKE | IRQCHIP_MASK_ON_SUSPEND;
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if (cpu_is_u8500_family() || cpu_is_ux540_family()) {
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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_u8500_family())
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db8500_prcmu_early_init();
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if (cpu_is_u8500_family())
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u8500_clk_init();
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else if (cpu_is_u9540())
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u9540_clk_init();
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else if (cpu_is_u8540())
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u8540_clk_init();
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}
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void __init ux500_init_late(void)
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{
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mop500_uib_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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