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-rw-r--r--kernel/arch/arm/mach-ux500/cpu.c153
1 files changed, 153 insertions, 0 deletions
diff --git a/kernel/arch/arm/mach-ux500/cpu.c b/kernel/arch/arm/mach-ux500/cpu.c
new file mode 100644
index 000000000..6ced0f680
--- /dev/null
+++ b/kernel/arch/arm/mach-ux500/cpu.c
@@ -0,0 +1,153 @@
+/*
+ * Copyright (C) ST-Ericsson SA 2010
+ *
+ * Author: Rabin Vincent <rabin.vincent@stericsson.com> for ST-Ericsson
+ * Author: Lee Jones <lee.jones@linaro.org> for ST-Ericsson
+ * License terms: GNU General Public License (GPL) version 2
+ */
+
+#include <linux/platform_device.h>
+#include <linux/io.h>
+#include <linux/mfd/dbx500-prcmu.h>
+#include <linux/clksrc-dbx500-prcmu.h>
+#include <linux/sys_soc.h>
+#include <linux/err.h>
+#include <linux/slab.h>
+#include <linux/stat.h>
+#include <linux/of.h>
+#include <linux/of_irq.h>
+#include <linux/irq.h>
+#include <linux/irqchip.h>
+#include <linux/irqchip/arm-gic.h>
+#include <linux/platform_data/clk-ux500.h>
+#include <linux/platform_data/arm-ux500-pm.h>
+
+#include <asm/mach/map.h>
+
+#include "setup.h"
+
+#include "board-mop500.h"
+#include "db8500-regs.h"
+#include "id.h"
+
+void ux500_restart(enum reboot_mode mode, const char *cmd)
+{
+ local_irq_disable();
+ local_fiq_disable();
+
+ prcmu_system_reset(0);
+}
+
+/*
+ * FIXME: Should we set up the GPIO domain here?
+ *
+ * The problem is that we cannot put the interrupt resources into the platform
+ * device until the irqdomain has been added. Right now, we set the GIC interrupt
+ * domain from init_irq(), then load the gpio driver from
+ * core_initcall(nmk_gpio_init) and add the platform devices from
+ * arch_initcall(customize_machine).
+ *
+ * This feels fragile because it depends on the gpio device getting probed
+ * _before_ any device uses the gpio interrupts.
+*/
+void __init ux500_init_irq(void)
+{
+ gic_set_irqchip_flags(IRQCHIP_SKIP_SET_WAKE | IRQCHIP_MASK_ON_SUSPEND);
+ irqchip_init();
+
+ /*
+ * Init clocks here so that they are available for system timer
+ * initialization.
+ */
+ if (cpu_is_u8500_family()) {
+ prcmu_early_init(U8500_PRCMU_BASE, SZ_8K - 1);
+ ux500_pm_init(U8500_PRCMU_BASE, SZ_8K - 1);
+
+ u8500_of_clk_init(U8500_CLKRST1_BASE,
+ U8500_CLKRST2_BASE,
+ U8500_CLKRST3_BASE,
+ U8500_CLKRST5_BASE,
+ U8500_CLKRST6_BASE);
+ } else if (cpu_is_u9540()) {
+ prcmu_early_init(U8500_PRCMU_BASE, SZ_8K - 1);
+ ux500_pm_init(U8500_PRCMU_BASE, SZ_8K - 1);
+ u9540_clk_init(U8500_CLKRST1_BASE, U8500_CLKRST2_BASE,
+ U8500_CLKRST3_BASE, U8500_CLKRST5_BASE,
+ U8500_CLKRST6_BASE);
+ } else if (cpu_is_u8540()) {
+ prcmu_early_init(U8500_PRCMU_BASE, SZ_8K + SZ_4K - 1);
+ ux500_pm_init(U8500_PRCMU_BASE, SZ_8K + SZ_4K - 1);
+ u8540_clk_init(U8500_CLKRST1_BASE, U8500_CLKRST2_BASE,
+ U8500_CLKRST3_BASE, U8500_CLKRST5_BASE,
+ U8500_CLKRST6_BASE);
+ }
+}
+
+static const char * __init ux500_get_machine(void)
+{
+ return kasprintf(GFP_KERNEL, "DB%4x", dbx500_partnumber());
+}
+
+static const char * __init ux500_get_family(void)
+{
+ return kasprintf(GFP_KERNEL, "ux500");
+}
+
+static const char * __init ux500_get_revision(void)
+{
+ unsigned int rev = dbx500_revision();
+
+ if (rev == 0x01)
+ return kasprintf(GFP_KERNEL, "%s", "ED");
+ else if (rev >= 0xA0)
+ return kasprintf(GFP_KERNEL, "%d.%d",
+ (rev >> 4) - 0xA + 1, rev & 0xf);
+
+ return kasprintf(GFP_KERNEL, "%s", "Unknown");
+}
+
+static ssize_t ux500_get_process(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ if (dbx500_id.process == 0x00)
+ return sprintf(buf, "Standard\n");
+
+ return sprintf(buf, "%02xnm\n", dbx500_id.process);
+}
+
+static void __init soc_info_populate(struct soc_device_attribute *soc_dev_attr,
+ const char *soc_id)
+{
+ soc_dev_attr->soc_id = soc_id;
+ soc_dev_attr->machine = ux500_get_machine();
+ soc_dev_attr->family = ux500_get_family();
+ soc_dev_attr->revision = ux500_get_revision();
+}
+
+static const struct device_attribute ux500_soc_attr =
+ __ATTR(process, S_IRUGO, ux500_get_process, NULL);
+
+struct device * __init ux500_soc_device_init(const char *soc_id)
+{
+ struct device *parent;
+ struct soc_device *soc_dev;
+ struct soc_device_attribute *soc_dev_attr;
+
+ soc_dev_attr = kzalloc(sizeof(*soc_dev_attr), GFP_KERNEL);
+ if (!soc_dev_attr)
+ return ERR_PTR(-ENOMEM);
+
+ soc_info_populate(soc_dev_attr, soc_id);
+
+ soc_dev = soc_device_register(soc_dev_attr);
+ if (IS_ERR(soc_dev)) {
+ kfree(soc_dev_attr);
+ return NULL;
+ }
+
+ parent = soc_device_to_device(soc_dev);
+ device_create_file(parent, &ux500_soc_attr);
+
+ return parent;
+}