diff options
Diffstat (limited to 'arch/arm/mach-ux500/cpu.c')
| -rw-r--r-- | arch/arm/mach-ux500/cpu.c | 114 |
1 files changed, 114 insertions, 0 deletions
diff --git a/arch/arm/mach-ux500/cpu.c b/arch/arm/mach-ux500/cpu.c index f4185749437..8d7f1bc7936 100644 --- a/arch/arm/mach-ux500/cpu.c +++ b/arch/arm/mach-ux500/cpu.c @@ -8,9 +8,13 @@ #include <linux/platform_device.h> #include <linux/io.h> #include <linux/clk.h> +#include <linux/mfd/dbx500-prcmu.h> #include <linux/mfd/db8500-prcmu.h> #include <linux/mfd/db5500-prcmu.h> #include <linux/clksrc-dbx500-prcmu.h> +#include <linux/delay.h> +#include <linux/stat.h> +#include <linux/sys_soc.h> #include <asm/hardware/gic.h> #include <asm/mach/map.h> @@ -19,11 +23,34 @@ #include <mach/hardware.h> #include <mach/setup.h> #include <mach/devices.h> +#include <mach/reboot_reasons.h> +#include <mach/pm.h> #include "clock.h" void __iomem *_PRCMU_BASE; +void ux500_restart(char mode, const char *cmd) +{ + unsigned short reset_code; + + reset_code = reboot_reason_code(cmd); + prcmu_system_reset(reset_code); + + mdelay(1000); + + /* + * On 5500, the PRCMU firmware waits for up to 2 seconds for the modem + * to respond. + */ + if (cpu_is_u5500()) + mdelay(2000); + + printk(KERN_ERR "Reboot via PRCMU failed -- System halted\n"); + while (1) + ; +} + void __init ux500_init_irq(void) { void __iomem *dist_base; @@ -41,6 +68,12 @@ void __init ux500_init_irq(void) gic_init(0, 29, dist_base, cpu_base); /* + * On WD reboot gic is in some cases decoupled. + * This will make sure that the GIC is correctly configured. + */ + ux500_pm_gic_recouple(); + + /* * Init clocks here so that they are available for system timer * initialization. */ @@ -48,5 +81,86 @@ void __init ux500_init_irq(void) db5500_prcmu_early_init(); if (cpu_is_u8500()) db8500_prcmu_early_init(); + + arm_pm_restart = ux500_restart; clk_init(); } + +#ifdef CONFIG_SYS_SOC +#define U8500_BB_UID_BASE (U8500_BACKUPRAM1_BASE + 0xFC0) +#define U8500_BB_UID_LENGTH 5 + +static ssize_t ux500_get_machine(char *buf, struct sysfs_soc_info *si) +{ + return sprintf(buf, "DB%2x00\n", dbx500_id.partnumber); +} + +static ssize_t ux500_get_soc_id(char *buf, struct sysfs_soc_info *si) +{ + void __iomem *uid_base; + int i; + ssize_t sz = 0; + + if (dbx500_id.partnumber == 0x85) { + uid_base = __io_address(U8500_BB_UID_BASE); + for (i = 0; i < U8500_BB_UID_LENGTH; i++) + sz += sprintf(buf + sz, "%08x", + readl(uid_base + i * sizeof(u32))); + sz += sprintf(buf + sz, "\n"); + } else { + /* Don't know where it is located for U5500 */ + sz = sprintf(buf, "N/A\n"); + } + + return sz; +} + +static ssize_t ux500_get_revision(char *buf, struct sysfs_soc_info *si) +{ + unsigned int rev = dbx500_id.revision; + + if (rev == 0x01) + return sprintf(buf, "%s\n", "ED"); + else if (rev >= 0xA0) + return sprintf(buf, "%d.%d\n" , + (rev >> 4) - 0xA + 1, rev & 0xf); + + return sprintf(buf, "%s", "Unknown\n"); +} + +static ssize_t ux500_get_process(char *buf, struct sysfs_soc_info *si) +{ + if (dbx500_id.process == 0x00) + return sprintf(buf, "Standard\n"); + + return sprintf(buf, "%02xnm\n", dbx500_id.process); +} + +static ssize_t ux500_get_reset_code(char *buf, struct sysfs_soc_info *si) +{ + return sprintf(buf, "0x%04x\n", prcmu_get_reset_code()); +} + +static ssize_t ux500_get_reset_reason(char *buf, struct sysfs_soc_info *si) +{ + return sprintf(buf, "%s\n", + reboot_reason_string(prcmu_get_reset_code())); +} + +static struct sysfs_soc_info soc_info[] = { + SYSFS_SOC_ATTR_CALLBACK("machine", ux500_get_machine), + SYSFS_SOC_ATTR_VALUE("family", "Ux500"), + SYSFS_SOC_ATTR_CALLBACK("soc_id", ux500_get_soc_id), + SYSFS_SOC_ATTR_CALLBACK("revision", ux500_get_revision), + SYSFS_SOC_ATTR_CALLBACK("process", ux500_get_process), + SYSFS_SOC_ATTR_CALLBACK("reset_code", ux500_get_reset_code), + SYSFS_SOC_ATTR_CALLBACK("reset_reason", ux500_get_reset_reason), +}; + +static int __init ux500_sys_soc_init(void) +{ + return register_sysfs_soc(soc_info, ARRAY_SIZE(soc_info)); +} + +module_init(ux500_sys_soc_init); +#endif |