Initial import

1 files changed, 153 insertions, 0 deletions

diff --git a/arch/arm/mach-ux500/cpu.c b/arch/arm/mach-ux500/cpu.c
new file mode 100644
index 000000000..6ced0f680
--- /dev/null
+++ b/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;
+}