* !CONFIG_OMAP_32K_TIMER on OMAP4/panda @ 2011-05-07 16:50 Rabin Vincent 2011-05-08 4:59 ` Pedanekar, Hemant 0 siblings, 1 reply; 4+ messages in thread From: Rabin Vincent @ 2011-05-07 16:50 UTC (permalink / raw) To: linux-omap [-- Attachment #1: Type: text/plain, Size: 7360 bytes --] On a linux-next kernel built for the Pandaboard, disabling CONFIG_OMAP_32K_TIMER makes the kernel use the gptimer as the clocksource, but this appears to be non-functional. Judging from the all-zeros printk timings and the fact the "sleep 1" hangs indefinitely, it looks like the clocksource reads are always zero. Boot log below and .config attached. Ideas? [ 0.000000] Linux version 2.6.39-rc6-next-20110506+ (rabin@debian) (gcc version 4.4.1 (Sourcery G++ Lite 2010q1-202) ) #183 PREEMPT Sat May 7 22:02:42 IST 2011 [ 0.000000] CPU: ARMv7 Processor [411fc092] revision 2 (ARMv7), cr=10c53c7f [ 0.000000] CPU: VIPT nonaliasing data cache, VIPT aliasing instruction cache [ 0.000000] Machine: OMAP4 Panda board [ 0.000000] Memory policy: ECC disabled, Data cache writeback [ 0.000000] OMAP4430 ES2.1 [ 0.000000] SRAM: Mapped pa 0x40300000 to va 0xfe400000 size: 0xe000 [ 0.000000] On node 0 totalpages: 131072 [ 0.000000] free_area_init_node: node 0, pgdat c0192ad8, node_mem_map c01db000 [ 0.000000] Normal zone: 1024 pages used for memmap [ 0.000000] Normal zone: 0 pages reserved [ 0.000000] Normal zone: 130048 pages, LIFO batch:31 [ 0.000000] pcpu-alloc: s0 r0 d32768 u32768 alloc=1*32768 [ 0.000000] pcpu-alloc: [0] 0 [ 0.000000] Built 1 zonelists in Zone order, mobility grouping on. Total pages: 130048 [ 0.000000] Kernel command line: console=ttyO2,115200 early_printk debug mem=512M [ 0.000000] PID hash table entries: 2048 (order: 1, 8192 bytes) [ 0.000000] Dentry cache hash table entries: 65536 (order: 6, 262144 bytes) [ 0.000000] Inode-cache hash table entries: 32768 (order: 5, 131072 bytes) [ 0.000000] Memory: 512MB = 512MB total [ 0.000000] Memory: 512640k/512640k available, 11648k reserved, 0K highmem [ 0.000000] Virtual kernel memory layout: [ 0.000000] vector : 0xffff0000 - 0xffff1000 ( 4 kB) [ 0.000000] fixmap : 0xfff00000 - 0xfffe0000 ( 896 kB) [ 0.000000] DMA : 0xffc00000 - 0xffe00000 ( 2 MB) [ 0.000000] vmalloc : 0xe0800000 - 0xf8000000 ( 376 MB) [ 0.000000] lowmem : 0xc0000000 - 0xe0000000 ( 512 MB) [ 0.000000] modules : 0xbf000000 - 0xc0000000 ( 16 MB) [ 0.000000] .init : 0xc0008000 - 0xc0024000 ( 112 kB) [ 0.000000] .text : 0xc0024000 - 0xc0170cec (1332 kB) [ 0.000000] .data : 0xc0172000 - 0xc0193100 ( 133 kB) [ 0.000000] Preemptible hierarchical RCU implementation. [ 0.000000] Verbose stalled-CPUs detection is disabled. [ 0.000000] NR_IRQS:410 [ 0.000000] omap_hwmod: dpll_mpu_m2_ck: missing clockdomain for dpll_mpu_m2_ck. [ 0.000000] OMAP clockevent source: GPTIMER1 at 38400000 Hz [ 0.000000] sched_clock: 32 bits at 38MHz, resolution 26ns, wraps every 111848ms [ 0.000000] Calibrating delay loop... 2007.04 BogoMIPS (lpj=10035200) [ 0.000000] pid_max: default: 32768 minimum: 301 [ 0.000000] Mount-cache hash table entries: 512 [ 0.000000] CPU: Testing write buffer coherency: ok [ 0.000000] L310 cache controller enabled [ 0.000000] l2x0: 16 ways, CACHE_ID 0x410000c4, AUX_CTRL 0x7e470000, Cache size: 1048576 B [ 0.000000] devtmpfs: initialized [ 0.000000] omap_hwmod: _populate_mpu_rt_base found no _mpu_rt_va for emif_fw [ 0.000000] omap_hwmod: _populate_mpu_rt_base found no _mpu_rt_va for l3_instr [ 0.000000] omap_hwmod: _populate_mpu_rt_base found no _mpu_rt_va for l3_main_1 [ 0.000000] omap_hwmod: _populate_mpu_rt_base found no _mpu_rt_va for l3_main_2 [ 0.000000] omap_hwmod: _populate_mpu_rt_base found no _mpu_rt_va for l4_abe [ 0.000000] omap_hwmod: _populate_mpu_rt_base found no _mpu_rt_va for l4_cfg [ 0.000000] omap_hwmod: _populate_mpu_rt_base found no _mpu_rt_va for l4_per [ 0.000000] omap_hwmod: _populate_mpu_rt_base found no _mpu_rt_va for l4_wkup [ 0.000000] omap_hwmod: _populate_mpu_rt_base found no _mpu_rt_va for mpu_private [ 0.000000] omap_hwmod: _populate_mpu_rt_base found no _mpu_rt_va for dsp [ 0.000000] omap_hwmod: _populate_mpu_rt_base found no _mpu_rt_va for ipu [ 0.000000] omap_hwmod: l3_div_ck: missing clockdomain for l3_div_ck. [ 0.000000] omap_hwmod: dss_dispc: softreset failed (waited 10000 usec) [ 0.000000] omap_hwmod: dss_rfbi: softreset failed (waited 10000 usec) [ 0.000000] omap_hwmod: ipu: failed to hardreset [ 0.000000] print_constraints: dummy: [ 0.000000] GPMC revision 6.0 [ 0.000000] OMAP GPIO hardware version 0.1 [ 0.000000] OMAP GPIO hardware version 0.1 [ 0.000000] OMAP GPIO hardware version 0.1 [ 0.000000] OMAP GPIO hardware version 0.1 [ 0.000000] OMAP GPIO hardware version 0.1 [ 0.000000] OMAP GPIO hardware version 0.1 [ 0.000000] omap_mux_init: Add partition: #1: core, flags: 2 [ 0.000000] omap_mux_init: Add partition: #2: wkup, flags: 2 [ 0.000000] error setting wl12xx data [ 0.000000] Failed omap4_twl6030_hsmmc_set_late_init [ 0.000000] Failed omap4_twl6030_hsmmc_set_late_init [ 0.000000] OMAP DMA hardware revision 0.0 [ 0.000000] print_constraints: vwl1271: 1800 mV [ 0.000000] omap_i2c omap_i2c.1: bus 1 rev4.0 at 400 kHz [ 0.000000] Skipping twl internal clock init and using bootloader value (unknown osc rate) [ 0.000000] twl6030: PIH (irq 39) chaining IRQs 368..387 [ 0.000000] print_constraints: VMMC: 1200 <--> 3000 mV at 1800 mV normal standby [ 0.000000] print_constraints: VPP: 1800 <--> 2500 mV at 1900 mV normal standby [ 0.000000] print_constraints: VANA: 2100 mV normal standby [ 0.000000] print_constraints: VCXIO: 1800 mV normal standby [ 0.000000] print_constraints: VDAC: 1800 mV normal standby [ 0.000000] print_constraints: VAUX2_6030: 1200 <--> 2800 mV at 1800 mV normal standby [ 0.000000] print_constraints: VAUX3_6030: 1000 <--> 3000 mV at 1200 mV normal standby [ 0.000000] print_constraints: CLK32KG: [ 0.000000] omap_i2c omap_i2c.2: bus 2 rev4.0 at 400 kHz [ 0.000000] omap_i2c omap_i2c.3: bus 3 rev4.0 at 100 kHz [ 0.000000] omap_i2c omap_i2c.4: bus 4 rev4.0 at 400 kHz [ 0.000000] Switching to clocksource gp timer [ 0.000000] Unpacking initramfs... [ 0.000000] Freeing initrd memory: 5208K [ 0.000000] omap_uart.0: ttyO0 at MMIO 0x4806a000 (irq = 104) is a OMAP UART0 [ 0.000000] omap_uart.1: ttyO1 at MMIO 0x4806c000 (irq = 105) is a OMAP UART1 [ 0.000000] omap_uart.2: ttyO2 at MMIO 0x48020000 (irq = 106) is a OMAP UART2 [ 0.000000] console [ttyO2] enabled [ 0.000000] omap_uart.3: ttyO3 at MMIO 0x4806e000 (irq = 102) is a OMAP UART3 [ 0.000000] i2c /dev entries driver [ 0.000000] OMAP Watchdog Timer Rev 0x00: initial timeout 60 sec [ 0.000000] Registered led device: pandaboard::status1 [ 0.000000] Registered led device: pandaboard::status2 [ 0.000000] VFP support v0.3: implementor 41 architecture 3 part 30 variant 9 rev 1 [ 0.000000] Power Management for TI OMAP4. [ 0.000000] clock: disabling unused clocks to save power [ 0.000000] Kernel not built with RTC support, ALARM timers will not wake from suspend [ 0.000000] regulator_init_complete: VDAC: incomplete constraints, leaving on [ 0.000000] regulator_init_complete: VCXIO: incomplete constraints, leaving on [ 0.000000] regulator_init_complete: VANA: incomplete constraints, leaving on [ 0.000000] Freeing init memory: 112K [-- Attachment #2: gptimer-config --] [-- Type: application/octet-stream, Size: 21946 bytes --] # # Automatically generated make config: don't edit # Linux/arm 2.6.39-rc6 Kernel Configuration # Sat May 7 21:58:58 2011 # CONFIG_ARM=y CONFIG_SYS_SUPPORTS_APM_EMULATION=y CONFIG_HAVE_SCHED_CLOCK=y CONFIG_GENERIC_GPIO=y # CONFIG_ARCH_USES_GETTIMEOFFSET is not set CONFIG_GENERIC_CLOCKEVENTS=y CONFIG_KTIME_SCALAR=y CONFIG_HAVE_PROC_CPU=y CONFIG_STACKTRACE_SUPPORT=y CONFIG_HAVE_LATENCYTOP_SUPPORT=y CONFIG_LOCKDEP_SUPPORT=y CONFIG_TRACE_IRQFLAGS_SUPPORT=y CONFIG_HARDIRQS_SW_RESEND=y CONFIG_GENERIC_IRQ_PROBE=y CONFIG_RWSEM_GENERIC_SPINLOCK=y CONFIG_ARCH_HAS_CPUFREQ=y CONFIG_ARCH_HAS_CPU_IDLE_WAIT=y CONFIG_GENERIC_HWEIGHT=y CONFIG_GENERIC_CALIBRATE_DELAY=y CONFIG_NEED_DMA_MAP_STATE=y CONFIG_VECTORS_BASE=0xffff0000 # CONFIG_ARM_PATCH_PHYS_VIRT is not set CONFIG_DEFCONFIG_LIST="/lib/modules/$UNAME_RELEASE/.config" CONFIG_CONSTRUCTORS=y CONFIG_HAVE_IRQ_WORK=y # # General setup # CONFIG_EXPERIMENTAL=y CONFIG_BROKEN_ON_SMP=y CONFIG_INIT_ENV_ARG_LIMIT=32 CONFIG_CROSS_COMPILE="arm-none-linux-gnueabi-" CONFIG_LOCALVERSION="" # CONFIG_LOCALVERSION_AUTO is not set CONFIG_HAVE_KERNEL_GZIP=y CONFIG_HAVE_KERNEL_LZMA=y CONFIG_HAVE_KERNEL_LZO=y CONFIG_KERNEL_GZIP=y # CONFIG_KERNEL_LZMA is not set # CONFIG_KERNEL_LZO is not set # CONFIG_SYSVIPC is not set # CONFIG_BSD_PROCESS_ACCT is not set # CONFIG_FHANDLE is not set CONFIG_HAVE_GENERIC_HARDIRQS=y # # IRQ subsystem # CONFIG_GENERIC_HARDIRQS=y CONFIG_HAVE_SPARSE_IRQ=y CONFIG_GENERIC_IRQ_SHOW=y # CONFIG_SPARSE_IRQ is not set # # RCU Subsystem # CONFIG_TREE_PREEMPT_RCU=y # CONFIG_TINY_RCU is not set # CONFIG_TINY_PREEMPT_RCU is not set CONFIG_PREEMPT_RCU=y # CONFIG_RCU_TRACE is not set CONFIG_RCU_FANOUT=32 # CONFIG_RCU_FANOUT_EXACT is not set # CONFIG_TREE_RCU_TRACE is not set # CONFIG_RCU_BOOST is not set # CONFIG_IKCONFIG is not set CONFIG_LOG_BUF_SHIFT=18 # CONFIG_NAMESPACES is not set # CONFIG_SCHED_AUTOGROUP is not set CONFIG_SCHED_TTWU_QUEUE=y # CONFIG_SYSFS_DEPRECATED is not set # CONFIG_RELAY is not set CONFIG_BLK_DEV_INITRD=y CONFIG_INITRAMFS_SOURCE="" # CONFIG_RD_GZIP is not set # CONFIG_RD_BZIP2 is not set # CONFIG_RD_LZMA is not set # CONFIG_RD_XZ is not set # CONFIG_RD_LZO is not set # CONFIG_CC_OPTIMIZE_FOR_SIZE is not set CONFIG_SYSCTL=y CONFIG_EXPERT=y CONFIG_UID16=y CONFIG_SYSCTL_SYSCALL=y CONFIG_KALLSYMS=y # CONFIG_KALLSYMS_ALL is not set CONFIG_HOTPLUG=y CONFIG_PRINTK=y CONFIG_BUG=y # CONFIG_ELF_CORE is not set CONFIG_BASE_FULL=y # CONFIG_FUTEX is not set # CONFIG_EPOLL is not set # CONFIG_SIGNALFD is not set # CONFIG_TIMERFD is not set # CONFIG_EVENTFD is not set # CONFIG_SHMEM is not set # CONFIG_AIO is not set CONFIG_EMBEDDED=y CONFIG_HAVE_PERF_EVENTS=y CONFIG_PERF_USE_VMALLOC=y # # Kernel Performance Events And Counters # # CONFIG_PERF_EVENTS is not set # CONFIG_PERF_COUNTERS is not set # CONFIG_VM_EVENT_COUNTERS is not set CONFIG_COMPAT_BRK=y CONFIG_SLAB=y # CONFIG_SLUB is not set # CONFIG_SLOB is not set # CONFIG_PROFILING is not set CONFIG_HAVE_OPROFILE=y CONFIG_HAVE_KPROBES=y CONFIG_HAVE_KRETPROBES=y CONFIG_HAVE_REGS_AND_STACK_ACCESS_API=y CONFIG_HAVE_CLK=y CONFIG_HAVE_DMA_API_DEBUG=y # # GCOV-based kernel profiling # # CONFIG_GCOV_KERNEL is not set CONFIG_HAVE_GENERIC_DMA_COHERENT=y CONFIG_SLABINFO=y CONFIG_RT_MUTEXES=y CONFIG_BASE_SMALL=0 # CONFIG_MODULES is not set # CONFIG_BLOCK is not set # CONFIG_INLINE_SPIN_TRYLOCK is not set # CONFIG_INLINE_SPIN_TRYLOCK_BH is not set # CONFIG_INLINE_SPIN_LOCK is not set # CONFIG_INLINE_SPIN_LOCK_BH is not set # CONFIG_INLINE_SPIN_LOCK_IRQ is not set # CONFIG_INLINE_SPIN_LOCK_IRQSAVE is not set # CONFIG_INLINE_SPIN_UNLOCK is not set # CONFIG_INLINE_SPIN_UNLOCK_BH is not set # CONFIG_INLINE_SPIN_UNLOCK_IRQ is not set # CONFIG_INLINE_SPIN_UNLOCK_IRQRESTORE is not set # CONFIG_INLINE_READ_TRYLOCK is not set # CONFIG_INLINE_READ_LOCK is not set # CONFIG_INLINE_READ_LOCK_BH is not set # CONFIG_INLINE_READ_LOCK_IRQ is not set # CONFIG_INLINE_READ_LOCK_IRQSAVE is not set # CONFIG_INLINE_READ_UNLOCK is not set # CONFIG_INLINE_READ_UNLOCK_BH is not set # CONFIG_INLINE_READ_UNLOCK_IRQ is not set # CONFIG_INLINE_READ_UNLOCK_IRQRESTORE is not set # CONFIG_INLINE_WRITE_TRYLOCK is not set # CONFIG_INLINE_WRITE_LOCK is not set # CONFIG_INLINE_WRITE_LOCK_BH is not set # CONFIG_INLINE_WRITE_LOCK_IRQ is not set # CONFIG_INLINE_WRITE_LOCK_IRQSAVE is not set # CONFIG_INLINE_WRITE_UNLOCK is not set # CONFIG_INLINE_WRITE_UNLOCK_BH is not set # CONFIG_INLINE_WRITE_UNLOCK_IRQ is not set # CONFIG_INLINE_WRITE_UNLOCK_IRQRESTORE is not set # CONFIG_MUTEX_SPIN_ON_OWNER is not set # CONFIG_FREEZER is not set # # System Type # CONFIG_MMU=y # CONFIG_ARCH_INTEGRATOR is not set # CONFIG_ARCH_REALVIEW is not set # CONFIG_ARCH_VERSATILE is not set # CONFIG_ARCH_VEXPRESS is not set # CONFIG_ARCH_AT91 is not set # CONFIG_ARCH_BCMRING is not set # CONFIG_ARCH_CLPS711X is not set # CONFIG_ARCH_CNS3XXX is not set # CONFIG_ARCH_GEMINI is not set # CONFIG_ARCH_EBSA110 is not set # CONFIG_ARCH_EP93XX is not set # CONFIG_ARCH_FOOTBRIDGE is not set # CONFIG_ARCH_MXC is not set # CONFIG_ARCH_MXS is not set # CONFIG_ARCH_NETX is not set # CONFIG_ARCH_H720X is not set # CONFIG_ARCH_IOP13XX is not set # CONFIG_ARCH_IOP32X is not set # CONFIG_ARCH_IOP33X is not set # CONFIG_ARCH_IXP23XX is not set # CONFIG_ARCH_IXP2000 is not set # CONFIG_ARCH_IXP4XX is not set # CONFIG_ARCH_DOVE is not set # CONFIG_ARCH_KIRKWOOD is not set # CONFIG_ARCH_LOKI is not set # CONFIG_ARCH_LPC32XX is not set # CONFIG_ARCH_MV78XX0 is not set # CONFIG_ARCH_ORION5X is not set # CONFIG_ARCH_MMP is not set # CONFIG_ARCH_KS8695 is not set # CONFIG_ARCH_W90X900 is not set # CONFIG_ARCH_NUC93X is not set # CONFIG_ARCH_TEGRA is not set # CONFIG_ARCH_PNX4008 is not set # CONFIG_ARCH_PXA is not set # CONFIG_ARCH_MSM is not set # CONFIG_ARCH_SHMOBILE is not set # CONFIG_ARCH_RPC is not set # CONFIG_ARCH_SA1100 is not set # CONFIG_ARCH_S3C2410 is not set # CONFIG_ARCH_S3C64XX is not set # CONFIG_ARCH_S5P64X0 is not set # CONFIG_ARCH_S5P6442 is not set # CONFIG_ARCH_S5PC100 is not set # CONFIG_ARCH_S5PV210 is not set # CONFIG_ARCH_EXYNOS4 is not set # CONFIG_ARCH_SHARK is not set # CONFIG_ARCH_TCC_926 is not set # CONFIG_ARCH_U300 is not set # CONFIG_ARCH_U8500 is not set # CONFIG_ARCH_NOMADIK is not set # CONFIG_ARCH_DAVINCI is not set CONFIG_ARCH_OMAP=y # CONFIG_PLAT_SPEAR is not set # CONFIG_ARCH_VT8500 is not set # CONFIG_ARCH_ZYNQ is not set # CONFIG_GPIO_PCA953X is not set # # TI OMAP Common Features # # CONFIG_ARCH_OMAP1 is not set CONFIG_ARCH_OMAP2PLUS=y # # OMAP Feature Selections # # CONFIG_OMAP_SMARTREFLEX is not set CONFIG_OMAP_RESET_CLOCKS=y CONFIG_OMAP_MUX=y CONFIG_OMAP_MUX_DEBUG=y CONFIG_OMAP_MUX_WARNINGS=y # CONFIG_OMAP_MCBSP is not set # CONFIG_OMAP_MBOX_FWK is not set # CONFIG_OMAP_32K_TIMER is not set CONFIG_OMAP_DM_TIMER=y CONFIG_OMAP_PM_NONE=y # CONFIG_OMAP_PM_NOOP is not set # # TI OMAP2/3/4 Specific Features # CONFIG_ARCH_OMAP2PLUS_TYPICAL=y # CONFIG_ARCH_OMAP2 is not set # CONFIG_ARCH_OMAP3 is not set CONFIG_ARCH_OMAP4=y CONFIG_OMAP_PACKAGE_CBL=y CONFIG_OMAP_PACKAGE_CBS=y # # OMAP Board Type # # CONFIG_MACH_OMAP_4430SDP is not set CONFIG_MACH_OMAP4_PANDA=y # # System MMU # # # Processor Type # CONFIG_CPU_V7=y CONFIG_CPU_32v6K=y CONFIG_CPU_32v7=y CONFIG_CPU_ABRT_EV7=y CONFIG_CPU_PABRT_V7=y CONFIG_CPU_CACHE_V7=y CONFIG_CPU_CACHE_VIPT=y CONFIG_CPU_COPY_V6=y CONFIG_CPU_TLB_V7=y CONFIG_CPU_HAS_ASID=y CONFIG_CPU_CP15=y CONFIG_CPU_CP15_MMU=y # # Processor Features # # CONFIG_ARM_THUMB is not set # CONFIG_ARM_THUMBEE is not set # CONFIG_SWP_EMULATE is not set # CONFIG_CPU_ICACHE_DISABLE is not set # CONFIG_CPU_DCACHE_DISABLE is not set # CONFIG_CPU_BPREDICT_DISABLE is not set CONFIG_OUTER_CACHE=y CONFIG_OUTER_CACHE_SYNC=y CONFIG_CACHE_L2X0=y CONFIG_CACHE_PL310=y CONFIG_ARM_L1_CACHE_SHIFT=5 CONFIG_ARM_DMA_MEM_BUFFERABLE=y CONFIG_CPU_HAS_PMU=y # CONFIG_ARM_ERRATA_430973 is not set # CONFIG_ARM_ERRATA_458693 is not set # CONFIG_ARM_ERRATA_460075 is not set CONFIG_PL310_ERRATA_588369=y CONFIG_ARM_ERRATA_720789=y CONFIG_PL310_ERRATA_727915=y # CONFIG_ARM_ERRATA_743622 is not set # CONFIG_ARM_ERRATA_753970 is not set # CONFIG_ARM_ERRATA_754322 is not set CONFIG_ARM_GIC=y # # Bus support # # CONFIG_PCI_SYSCALL is not set # CONFIG_ARCH_SUPPORTS_MSI is not set # CONFIG_PCCARD is not set # # Kernel Features # # CONFIG_NO_HZ is not set # CONFIG_HIGH_RES_TIMERS is not set CONFIG_GENERIC_CLOCKEVENTS_BUILD=y # CONFIG_SMP is not set CONFIG_VMSPLIT_3G=y # CONFIG_VMSPLIT_2G is not set # CONFIG_VMSPLIT_1G is not set CONFIG_PAGE_OFFSET=0xC0000000 # CONFIG_PREEMPT_NONE is not set # CONFIG_PREEMPT_VOLUNTARY is not set CONFIG_PREEMPT=y CONFIG_HZ=100 # CONFIG_THUMB2_KERNEL is not set CONFIG_AEABI=y # CONFIG_OABI_COMPAT is not set CONFIG_ARCH_HAS_HOLES_MEMORYMODEL=y # CONFIG_ARCH_SPARSEMEM_DEFAULT is not set # CONFIG_ARCH_SELECT_MEMORY_MODEL is not set # CONFIG_HIGHMEM is not set CONFIG_SELECT_MEMORY_MODEL=y CONFIG_FLATMEM_MANUAL=y CONFIG_FLATMEM=y CONFIG_FLAT_NODE_MEM_MAP=y CONFIG_HAVE_MEMBLOCK=y CONFIG_PAGEFLAGS_EXTENDED=y CONFIG_SPLIT_PTLOCK_CPUS=4 # CONFIG_COMPACTION is not set # CONFIG_PHYS_ADDR_T_64BIT is not set CONFIG_ZONE_DMA_FLAG=0 CONFIG_VIRT_TO_BUS=y # CONFIG_KSM is not set CONFIG_DEFAULT_MMAP_MIN_ADDR=4096 CONFIG_NEED_PER_CPU_KM=y # CONFIG_CLEANCACHE is not set CONFIG_FORCE_MAX_ZONEORDER=11 # CONFIG_LEDS is not set CONFIG_ALIGNMENT_TRAP=y # CONFIG_UACCESS_WITH_MEMCPY is not set # CONFIG_SECCOMP is not set # CONFIG_CC_STACKPROTECTOR is not set # CONFIG_DEPRECATED_PARAM_STRUCT is not set # # Boot options # CONFIG_ZBOOT_ROM_TEXT=0x0 CONFIG_ZBOOT_ROM_BSS=0x0 CONFIG_CMDLINE="root=/dev/mmcblk0p2 rootwait console=ttyO2,115200" # CONFIG_CMDLINE_FORCE is not set # CONFIG_XIP_KERNEL is not set CONFIG_KEXEC=y CONFIG_ATAGS_PROC=y # CONFIG_CRASH_DUMP is not set # CONFIG_AUTO_ZRELADDR is not set # # CPU Power Management # # # CPU Frequency scaling # # CONFIG_CPU_FREQ is not set # CONFIG_CPU_IDLE is not set # # Floating point emulation # # # At least one emulation must be selected # CONFIG_VFP=y CONFIG_VFPv3=y CONFIG_NEON=y # # Userspace binary formats # CONFIG_BINFMT_ELF=y CONFIG_HAVE_AOUT=y # CONFIG_BINFMT_AOUT is not set # CONFIG_BINFMT_MISC is not set # # Power management options # # CONFIG_SUSPEND is not set CONFIG_PM_RUNTIME=y CONFIG_PM=y # CONFIG_PM_DEBUG is not set # CONFIG_APM_EMULATION is not set CONFIG_ARCH_HAS_OPP=y CONFIG_PM_OPP=y CONFIG_PM_RUNTIME_CLK=y CONFIG_ARCH_SUSPEND_POSSIBLE=y # CONFIG_NET is not set # # Device Drivers # # # Generic Driver Options # CONFIG_UEVENT_HELPER_PATH="/sbin/hotplug" CONFIG_DEVTMPFS=y # CONFIG_DEVTMPFS_MOUNT is not set CONFIG_STANDALONE=y CONFIG_PREVENT_FIRMWARE_BUILD=y # CONFIG_FW_LOADER is not set # CONFIG_DEBUG_DRIVER is not set # CONFIG_DEBUG_DEVRES is not set # CONFIG_SYS_HYPERVISOR is not set # CONFIG_MTD is not set # CONFIG_PARPORT is not set # CONFIG_MISC_DEVICES is not set CONFIG_HAVE_IDE=y # # SCSI device support # CONFIG_SCSI_MOD=y # CONFIG_SCSI_DMA is not set # CONFIG_SCSI_NETLINK is not set # CONFIG_PHONE is not set # # Input device support # # CONFIG_INPUT is not set # # Hardware I/O ports # # CONFIG_SERIO is not set # CONFIG_GAMEPORT is not set # # Character devices # # CONFIG_VT is not set # CONFIG_UNIX98_PTYS is not set # CONFIG_LEGACY_PTYS is not set # CONFIG_SERIAL_NONSTANDARD is not set # CONFIG_DEVKMEM is not set # # Serial drivers # # CONFIG_SERIAL_8250 is not set # # Non-8250 serial port support # CONFIG_SERIAL_CORE=y CONFIG_SERIAL_CORE_CONSOLE=y CONFIG_SERIAL_OMAP=y CONFIG_SERIAL_OMAP_CONSOLE=y # CONFIG_SERIAL_TIMBERDALE is not set # CONFIG_SERIAL_ALTERA_JTAGUART is not set # CONFIG_SERIAL_ALTERA_UART is not set # CONFIG_SERIAL_XILINX_PS_UART is not set # CONFIG_TTY_PRINTK is not set # CONFIG_HVC_DCC is not set # CONFIG_IPMI_HANDLER is not set # CONFIG_HW_RANDOM is not set # CONFIG_R3964 is not set # CONFIG_TCG_TPM is not set # CONFIG_RAMOOPS is not set CONFIG_I2C=y CONFIG_I2C_BOARDINFO=y CONFIG_I2C_COMPAT=y CONFIG_I2C_CHARDEV=y # CONFIG_I2C_MUX is not set CONFIG_I2C_HELPER_AUTO=y # # I2C Hardware Bus support # # # I2C system bus drivers (mostly embedded / system-on-chip) # # CONFIG_I2C_DESIGNWARE_PLATFORM is not set # CONFIG_I2C_GPIO is not set # CONFIG_I2C_OCORES is not set CONFIG_I2C_OMAP=y # CONFIG_I2C_PCA_PLATFORM is not set # CONFIG_I2C_PXA_PCI is not set # CONFIG_I2C_SIMTEC is not set # CONFIG_I2C_XILINX is not set # # External I2C/SMBus adapter drivers # # CONFIG_I2C_PARPORT_LIGHT is not set # CONFIG_I2C_TAOS_EVM is not set # # Other I2C/SMBus bus drivers # # CONFIG_I2C_DEBUG_CORE is not set # CONFIG_I2C_DEBUG_ALGO is not set # CONFIG_I2C_DEBUG_BUS is not set # CONFIG_SPI is not set # # PPS support # # CONFIG_PPS is not set # # PPS generators support # CONFIG_ARCH_REQUIRE_GPIOLIB=y CONFIG_GPIOLIB=y # CONFIG_DEBUG_GPIO is not set # CONFIG_GPIO_SYSFS is not set # # Memory mapped GPIO drivers: # # CONFIG_GPIO_BASIC_MMIO is not set # CONFIG_GPIO_IT8761E is not set # # I2C GPIO expanders: # # CONFIG_GPIO_MAX7300 is not set # CONFIG_GPIO_MAX732X is not set # CONFIG_GPIO_PCF857X is not set # CONFIG_GPIO_SX150X is not set CONFIG_GPIO_TWL4030=y # CONFIG_GPIO_ADP5588 is not set # # PCI GPIO expanders: # # # SPI GPIO expanders: # # # AC97 GPIO expanders: # # # MODULbus GPIO expanders: # # CONFIG_W1 is not set # CONFIG_POWER_SUPPLY is not set # CONFIG_HWMON is not set # CONFIG_THERMAL is not set CONFIG_WATCHDOG=y # CONFIG_WATCHDOG_NOWAYOUT is not set # # Watchdog Device Drivers # # CONFIG_SOFT_WATCHDOG is not set CONFIG_OMAP_WATCHDOG=y # CONFIG_TWL4030_WATCHDOG is not set # CONFIG_MAX63XX_WATCHDOG is not set CONFIG_SSB_POSSIBLE=y # # Sonics Silicon Backplane # # CONFIG_SSB is not set CONFIG_MFD_SUPPORT=y # CONFIG_MFD_CORE is not set # CONFIG_MFD_88PM860X is not set # CONFIG_MFD_SM501 is not set # CONFIG_MFD_ASIC3 is not set # CONFIG_HTC_EGPIO is not set # CONFIG_HTC_PASIC3 is not set # CONFIG_HTC_I2CPLD is not set # CONFIG_TPS6105X is not set # CONFIG_TPS65010 is not set # CONFIG_TPS6507X is not set # CONFIG_MFD_TPS6586X is not set CONFIG_TWL4030_CORE=y # CONFIG_TWL4030_MADC is not set CONFIG_TWL4030_POWER=y # CONFIG_TWL4030_CODEC is not set # CONFIG_TWL6030_PWM is not set # CONFIG_MFD_STMPE is not set # CONFIG_MFD_TC3589X is not set # CONFIG_MFD_TMIO is not set # CONFIG_MFD_T7L66XB is not set # CONFIG_MFD_TC6387XB is not set # CONFIG_MFD_TC6393XB is not set # CONFIG_PMIC_DA903X is not set # CONFIG_PMIC_ADP5520 is not set # CONFIG_MFD_MAX8925 is not set # CONFIG_MFD_MAX8997 is not set # CONFIG_MFD_MAX8998 is not set # CONFIG_MFD_WM8400 is not set # CONFIG_MFD_WM831X_I2C is not set # CONFIG_MFD_WM8350_I2C is not set # CONFIG_MFD_WM8994 is not set # CONFIG_MFD_PCF50633 is not set # CONFIG_ABX500_CORE is not set # CONFIG_MFD_WL1273_CORE is not set CONFIG_REGULATOR=y # CONFIG_REGULATOR_DEBUG is not set # CONFIG_REGULATOR_DUMMY is not set CONFIG_REGULATOR_FIXED_VOLTAGE=y # CONFIG_REGULATOR_VIRTUAL_CONSUMER is not set # CONFIG_REGULATOR_USERSPACE_CONSUMER is not set # CONFIG_REGULATOR_BQ24022 is not set # CONFIG_REGULATOR_MAX1586 is not set # CONFIG_REGULATOR_MAX8649 is not set # CONFIG_REGULATOR_MAX8660 is not set # CONFIG_REGULATOR_MAX8952 is not set CONFIG_REGULATOR_TWL4030=y # CONFIG_REGULATOR_LP3971 is not set # CONFIG_REGULATOR_LP3972 is not set CONFIG_REGULATOR_TPS65023=y CONFIG_REGULATOR_TPS6507X=y # CONFIG_REGULATOR_ISL6271A is not set # CONFIG_REGULATOR_AD5398 is not set # CONFIG_MEDIA_SUPPORT is not set # # Graphics support # # CONFIG_DRM is not set # CONFIG_VGASTATE is not set # CONFIG_VIDEO_OUTPUT_CONTROL is not set # CONFIG_FB is not set # CONFIG_OMAP2_DSS is not set # CONFIG_BACKLIGHT_LCD_SUPPORT is not set # # Display device support # # CONFIG_DISPLAY_SUPPORT is not set # CONFIG_SOUND is not set # CONFIG_USB_SUPPORT is not set CONFIG_USB_ARCH_HAS_EHCI=y # CONFIG_MMC is not set # CONFIG_MEMSTICK is not set CONFIG_NEW_LEDS=y CONFIG_LEDS_CLASS=y # # LED drivers # # CONFIG_LEDS_LM3530 is not set CONFIG_LEDS_GPIO=y CONFIG_LEDS_GPIO_PLATFORM=y # CONFIG_LEDS_LP3944 is not set # CONFIG_LEDS_LP5521 is not set # CONFIG_LEDS_LP5523 is not set # CONFIG_LEDS_PCA955X is not set # CONFIG_LEDS_REGULATOR is not set # CONFIG_LEDS_BD2802 is not set # CONFIG_LEDS_LT3593 is not set CONFIG_LEDS_TRIGGERS=y # # LED Triggers # # CONFIG_LEDS_TRIGGER_TIMER is not set CONFIG_LEDS_TRIGGER_HEARTBEAT=y # CONFIG_LEDS_TRIGGER_BACKLIGHT is not set # CONFIG_LEDS_TRIGGER_GPIO is not set # CONFIG_LEDS_TRIGGER_DEFAULT_ON is not set # # iptables trigger is under Netfilter config (LED target) # # CONFIG_NFC_DEVICES is not set # CONFIG_ACCESSIBILITY is not set CONFIG_RTC_LIB=y # CONFIG_RTC_CLASS is not set # CONFIG_DMADEVICES is not set # CONFIG_AUXDISPLAY is not set # CONFIG_UIO is not set # CONFIG_STAGING is not set CONFIG_CLKDEV_LOOKUP=y # CONFIG_HWSPINLOCK is not set # # File systems # # CONFIG_FS_POSIX_ACL is not set # CONFIG_FILE_LOCKING is not set # CONFIG_FSNOTIFY is not set # CONFIG_DNOTIFY is not set # CONFIG_INOTIFY_USER is not set # CONFIG_FANOTIFY is not set # CONFIG_QUOTA is not set # CONFIG_QUOTACTL is not set # CONFIG_AUTOFS4_FS is not set # CONFIG_FUSE_FS is not set # # Caches # # CONFIG_FSCACHE is not set # # Pseudo filesystems # CONFIG_PROC_FS=y CONFIG_PROC_SYSCTL=y # CONFIG_PROC_PAGE_MONITOR is not set CONFIG_SYSFS=y # CONFIG_HUGETLB_PAGE is not set # CONFIG_CONFIGFS_FS is not set # CONFIG_MISC_FILESYSTEMS is not set CONFIG_NLS=y CONFIG_NLS_DEFAULT="iso8859-1" # CONFIG_NLS_CODEPAGE_437 is not set # CONFIG_NLS_CODEPAGE_737 is not set # CONFIG_NLS_CODEPAGE_775 is not set # CONFIG_NLS_CODEPAGE_850 is not set # CONFIG_NLS_CODEPAGE_852 is not set # CONFIG_NLS_CODEPAGE_855 is not set # CONFIG_NLS_CODEPAGE_857 is not set # CONFIG_NLS_CODEPAGE_860 is not set # CONFIG_NLS_CODEPAGE_861 is not set # CONFIG_NLS_CODEPAGE_862 is not set # CONFIG_NLS_CODEPAGE_863 is not set # CONFIG_NLS_CODEPAGE_864 is not set # CONFIG_NLS_CODEPAGE_865 is not set # CONFIG_NLS_CODEPAGE_866 is not set # CONFIG_NLS_CODEPAGE_869 is not set # CONFIG_NLS_CODEPAGE_936 is not set # CONFIG_NLS_CODEPAGE_950 is not set # CONFIG_NLS_CODEPAGE_932 is not set # CONFIG_NLS_CODEPAGE_949 is not set # CONFIG_NLS_CODEPAGE_874 is not set # CONFIG_NLS_ISO8859_8 is not set # CONFIG_NLS_CODEPAGE_1250 is not set # CONFIG_NLS_CODEPAGE_1251 is not set # CONFIG_NLS_ASCII is not set # CONFIG_NLS_ISO8859_1 is not set # CONFIG_NLS_ISO8859_2 is not set # CONFIG_NLS_ISO8859_3 is not set # CONFIG_NLS_ISO8859_4 is not set # CONFIG_NLS_ISO8859_5 is not set # CONFIG_NLS_ISO8859_6 is not set # CONFIG_NLS_ISO8859_7 is not set # CONFIG_NLS_ISO8859_9 is not set # CONFIG_NLS_ISO8859_13 is not set # CONFIG_NLS_ISO8859_14 is not set # CONFIG_NLS_ISO8859_15 is not set # CONFIG_NLS_KOI8_R is not set # CONFIG_NLS_KOI8_U is not set # CONFIG_NLS_UTF8 is not set # # Kernel hacking # CONFIG_PRINTK_TIME=y CONFIG_DEFAULT_MESSAGE_LOGLEVEL=4 CONFIG_ENABLE_WARN_DEPRECATED=y CONFIG_ENABLE_MUST_CHECK=y CONFIG_FRAME_WARN=1024 CONFIG_MAGIC_SYSRQ=y # CONFIG_STRIP_ASM_SYMS is not set # CONFIG_UNUSED_SYMBOLS is not set CONFIG_DEBUG_FS=y # CONFIG_HEADERS_CHECK is not set # CONFIG_DEBUG_SECTION_MISMATCH is not set CONFIG_DEBUG_KERNEL=y # CONFIG_DEBUG_SHIRQ is not set # CONFIG_LOCKUP_DETECTOR is not set # CONFIG_HARDLOCKUP_DETECTOR is not set # CONFIG_DETECT_HUNG_TASK is not set CONFIG_SCHED_DEBUG=y # CONFIG_SCHEDSTATS is not set # CONFIG_TIMER_STATS is not set # CONFIG_DEBUG_OBJECTS is not set # CONFIG_DEBUG_SLAB is not set # CONFIG_DEBUG_KMEMLEAK is not set # CONFIG_DEBUG_PREEMPT is not set # CONFIG_DEBUG_RT_MUTEXES is not set # CONFIG_RT_MUTEX_TESTER is not set # CONFIG_DEBUG_SPINLOCK is not set # CONFIG_DEBUG_MUTEXES is not set # CONFIG_DEBUG_LOCK_ALLOC is not set # CONFIG_PROVE_LOCKING is not set # CONFIG_SPARSE_RCU_POINTER is not set # CONFIG_LOCK_STAT is not set # CONFIG_DEBUG_SPINLOCK_SLEEP is not set # CONFIG_DEBUG_LOCKING_API_SELFTESTS is not set # CONFIG_DEBUG_KOBJECT is not set CONFIG_DEBUG_BUGVERBOSE=y CONFIG_DEBUG_INFO=y # CONFIG_DEBUG_INFO_REDUCED is not set # CONFIG_DEBUG_VM is not set # CONFIG_DEBUG_WRITECOUNT is not set # CONFIG_DEBUG_MEMORY_INIT is not set # CONFIG_DEBUG_LIST is not set # CONFIG_TEST_LIST_SORT is not set # CONFIG_DEBUG_SG is not set # CONFIG_DEBUG_NOTIFIERS is not set # CONFIG_DEBUG_CREDENTIALS is not set # CONFIG_BOOT_PRINTK_DELAY is not set # CONFIG_RCU_TORTURE_TEST is not set CONFIG_RCU_CPU_STALL_TIMEOUT=60 # CONFIG_RCU_CPU_STALL_VERBOSE is not set # CONFIG_BACKTRACE_SELF_TEST is not set # CONFIG_DEBUG_FORCE_WEAK_PER_CPU is not set # CONFIG_FAULT_INJECTION is not set # CONFIG_LATENCYTOP is not set # CONFIG_SYSCTL_SYSCALL_CHECK is not set # CONFIG_DEBUG_PAGEALLOC is not set CONFIG_HAVE_FUNCTION_TRACER=y CONFIG_HAVE_FUNCTION_GRAPH_TRACER=y CONFIG_HAVE_DYNAMIC_FTRACE=y CONFIG_HAVE_FTRACE_MCOUNT_RECORD=y CONFIG_HAVE_C_RECORDMCOUNT=y CONFIG_TRACING_SUPPORT=y # CONFIG_FTRACE is not set # CONFIG_DYNAMIC_DEBUG is not set # CONFIG_DMA_API_DEBUG is not set # CONFIG_ATOMIC64_SELFTEST is not set # CONFIG_SAMPLES is not set CONFIG_HAVE_ARCH_KGDB=y # CONFIG_KGDB is not set # CONFIG_TEST_KSTRTOX is not set # CONFIG_STRICT_DEVMEM is not set CONFIG_ARM_UNWIND=y # CONFIG_DEBUG_USER is not set # CONFIG_DEBUG_STACK_USAGE is not set CONFIG_DEBUG_LL=y CONFIG_EARLY_PRINTK=y # CONFIG_DEBUG_ICEDCC is not set # CONFIG_OC_ETM is not set # # Security options # # CONFIG_KEYS is not set # CONFIG_SECURITY_DMESG_RESTRICT is not set # CONFIG_SECURITY is not set # CONFIG_SECURITYFS is not set CONFIG_DEFAULT_SECURITY_DAC=y CONFIG_DEFAULT_SECURITY="" # CONFIG_CRYPTO is not set # CONFIG_BINARY_PRINTF is not set # # Library routines # CONFIG_BITREVERSE=y CONFIG_GENERIC_FIND_LAST_BIT=y # CONFIG_CRC_CCITT is not set # CONFIG_CRC16 is not set # CONFIG_CRC_T10DIF is not set # CONFIG_CRC_ITU_T is not set CONFIG_CRC32=y # CONFIG_CRC7 is not set # CONFIG_LIBCRC32C is not set # CONFIG_XZ_DEC is not set # CONFIG_XZ_DEC_BCJ is not set CONFIG_HAS_IOMEM=y CONFIG_HAS_IOPORT=y CONFIG_HAS_DMA=y # CONFIG_AVERAGE is not set ^ permalink raw reply [flat|nested] 4+ messages in thread
* RE: !CONFIG_OMAP_32K_TIMER on OMAP4/panda 2011-05-07 16:50 !CONFIG_OMAP_32K_TIMER on OMAP4/panda Rabin Vincent @ 2011-05-08 4:59 ` Pedanekar, Hemant 2011-05-08 9:11 ` Rabin Vincent 2011-05-13 12:53 ` Kevin Hilman 0 siblings, 2 replies; 4+ messages in thread From: Pedanekar, Hemant @ 2011-05-08 4:59 UTC (permalink / raw) To: Rabin Vincent, linux-omap Hello, linux-omap-owner@vger.kernel.org wrote on Saturday, May 07, 2011 10:21 PM: > On a linux-next kernel built for the Pandaboard, disabling > CONFIG_OMAP_32K_TIMER makes the kernel use the gptimer as the > clocksource, but this appears to be non-functional. Judging from the > all-zeros printk timings and the fact the "sleep 1" hangs indefinitely, > it looks like the clocksource reads are always zero. > > Boot log below and .config attached. Ideas? > > [ 0.000000] Linux version 2.6.39-rc6-next-20110506+ (rabin@debian) [...] > [ 0.000000] Freeing init memory: 112K This looks similar to the issue I observed on TI816X with 32K timer disabled. I have created following patch (currently a tempfix) for making timekeeping work with MPU timer selected (other option is to use ".flags = HWMOD_INIT_NO_RESET" in hwmod data for the timer used as clocksource): commit 77cce922c00ced4407776cc0a1d84cee40b7da90 Author: Hemant Pedanekar <hemantp@ti.com> Date: Thu Apr 28 12:59:24 2011 +0530 dmtimer: Initialize the hwmod for timer used as clocksource Since dmtimer driver still doesn't use hwmods, the 2nd timer used as clocksource is not set up. This results into timekeepoing failure when the timer used as clocksource gets reset during hwmod setup. To prevent this, explicitly call omap_hwmod_setup_one() for timer used as clocksource. Note that is is aplpicable when NOT using 32k timer which is the case for TI816X. For other configurations, this code will not be executed unless 32K timer is explicitly disabled. Signed-off-by: Hemant Pedanekar <hemantp@ti.com> diff --git a/arch/arm/mach-omap2/timer-gp.c b/arch/arm/mach-omap2/timer-gp.c index 3b9cf85..290fbfa 100644 --- a/arch/arm/mach-omap2/timer-gp.c +++ b/arch/arm/mach-omap2/timer-gp.c @@ -229,6 +229,11 @@ static void __init omap2_gp_clocksource_init(void) "%s: failed to request dm-timer\n"; static char err2[] __initdata = KERN_ERR "%s: can't register clocksource!\n"; + char clocksource_hwmod_name[8]; /* 8 = sizeof("timerXX0") */ + + /* XXX: This may not be always true, we might get different timer */ + sprintf(clocksource_hwmod_name, "timer%d", gptimer_id + 1); + omap_hwmod_setup_one(clocksource_hwmod_name); gpt = omap_dm_timer_request(); if (!gpt) Hemant ^ permalink raw reply related [flat|nested] 4+ messages in thread
* Re: !CONFIG_OMAP_32K_TIMER on OMAP4/panda 2011-05-08 4:59 ` Pedanekar, Hemant @ 2011-05-08 9:11 ` Rabin Vincent 2011-05-13 12:53 ` Kevin Hilman 1 sibling, 0 replies; 4+ messages in thread From: Rabin Vincent @ 2011-05-08 9:11 UTC (permalink / raw) To: Pedanekar, Hemant; +Cc: linux-omap On Sun, May 8, 2011 at 10:29, Pedanekar, Hemant <hemantp@ti.com> wrote: > diff --git a/arch/arm/mach-omap2/timer-gp.c b/arch/arm/mach-omap2/timer-gp.c > index 3b9cf85..290fbfa 100644 > --- a/arch/arm/mach-omap2/timer-gp.c > +++ b/arch/arm/mach-omap2/timer-gp.c > @@ -229,6 +229,11 @@ static void __init omap2_gp_clocksource_init(void) > "%s: failed to request dm-timer\n"; > static char err2[] __initdata = KERN_ERR > "%s: can't register clocksource!\n"; > + char clocksource_hwmod_name[8]; /* 8 = sizeof("timerXX0") */ > + > + /* XXX: This may not be always true, we might get different timer */ > + sprintf(clocksource_hwmod_name, "timer%d", gptimer_id + 1); > + omap_hwmod_setup_one(clocksource_hwmod_name); > > gpt = omap_dm_timer_request(); > if (!gpt) > Thanks, this appears to fix the gp timer clocksource on OMAP4: Tested-by: Rabin Vincent <rabin@rab.in> However, sched_clock() is broken with !CONFIG_OMAP_32K_TIMER, and it needs the below patch in addition to yours: 8<---------- From 3fa494b910cc65c31b661a0a99a9fcf207d9b795 Mon Sep 17 00:00:00 2001 From: Rabin Vincent <rabin@rab.in> Date: Sun, 8 May 2011 14:23:50 +0530 Subject: [PATCH] OMAP2+: use timer-gp as sched_clock when 32k timer is disabled When OMAP_32K_TIMER is disabled, sched_clock() always returns zero because it incorrectly always uses the (non-initialized) 32k timer clocksource. To fix this, make sched_clock() use the gp timer clocksource when the 32k timer is disabled. Signed-off-by: Rabin Vincent <rabin@rab.in> --- arch/arm/mach-omap2/timer-gp.c | 16 ++++++++++++++-- arch/arm/plat-omap/counter_32k.c | 8 ++++---- arch/arm/plat-omap/dmtimer.c | 2 +- 3 files changed, 19 insertions(+), 7 deletions(-) diff --git a/arch/arm/mach-omap2/timer-gp.c b/arch/arm/mach-omap2/timer-gp.c index 3b9cf85..e783bfe 100644 --- a/arch/arm/mach-omap2/timer-gp.c +++ b/arch/arm/mach-omap2/timer-gp.c @@ -198,15 +198,20 @@ static void __init omap2_gp_clocksource_init(void) */ static DEFINE_CLOCK_DATA(cd); static struct omap_dm_timer *gpt_clocksource; -static cycle_t clocksource_read_cycles(struct clocksource *cs) +static cycle_t notrace clocksource_read_cycles(struct clocksource *cs) { return (cycle_t)omap_dm_timer_read_counter(gpt_clocksource); } +static cycle_t notrace clocksource_gpt_read_dummy(struct clocksource *cs) +{ + return 0; +} + static struct clocksource clocksource_gpt = { .name = "gp timer", .rating = 300, - .read = clocksource_read_cycles, + .read = clocksource_gpt_read_dummy, .mask = CLOCKSOURCE_MASK(32), .flags = CLOCK_SOURCE_IS_CONTINUOUS, }; @@ -220,6 +225,12 @@ static void notrace dmtimer_update_sched_clock(void) update_sched_clock(&cd, cyc, (u32)~0); } +unsigned long long notrace sched_clock(void) +{ + u32 cyc = clocksource_gpt.read(&clocksource_gpt); + return cyc_to_sched_clock(&cd, cyc, (u32)~0); +} + /* Setup free-running counter for clocksource */ static void __init omap2_gp_clocksource_init(void) { @@ -240,6 +251,7 @@ static void __init omap2_gp_clocksource_init(void) omap_dm_timer_set_load_start(gpt, 1, 0); + clocksource_gpt.read = clocksource_read_cycles; init_sched_clock(&cd, dmtimer_update_sched_clock, 32, tick_rate); if (clocksource_register_hz(&clocksource_gpt, tick_rate)) diff --git a/arch/arm/plat-omap/counter_32k.c b/arch/arm/plat-omap/counter_32k.c index f7fed60..9231499 100644 --- a/arch/arm/plat-omap/counter_32k.c +++ b/arch/arm/plat-omap/counter_32k.c @@ -126,13 +126,13 @@ static inline unsigned long long notrace _omap_32k_sched_clock(void) return cyc_to_fixed_sched_clock(&cd, cyc, (u32)~0, SC_MULT, SC_SHIFT); } -#ifndef CONFIG_OMAP_MPU_TIMER -unsigned long long notrace sched_clock(void) +#ifdef CONFIG_OMAP_MPU_TIMER +unsigned long long notrace omap_32k_sched_clock(void) { return _omap_32k_sched_clock(); } -#else -unsigned long long notrace omap_32k_sched_clock(void) +#elif defined(CONFIG_OMAP_32K_TIMER) +unsigned long long notrace sched_clock(void) { return _omap_32k_sched_clock(); } diff --git a/arch/arm/plat-omap/dmtimer.c b/arch/arm/plat-omap/dmtimer.c index ee9f6eb..0648d63 100644 --- a/arch/arm/plat-omap/dmtimer.c +++ b/arch/arm/plat-omap/dmtimer.c @@ -700,7 +700,7 @@ void omap_dm_timer_write_status(struct omap_dm_timer *timer, unsigned int value) } EXPORT_SYMBOL_GPL(omap_dm_timer_write_status); -unsigned int omap_dm_timer_read_counter(struct omap_dm_timer *timer) +unsigned int notrace omap_dm_timer_read_counter(struct omap_dm_timer *timer) { unsigned int l; -- 1.7.4.1 -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html ^ permalink raw reply related [flat|nested] 4+ messages in thread
* Re: !CONFIG_OMAP_32K_TIMER on OMAP4/panda 2011-05-08 4:59 ` Pedanekar, Hemant 2011-05-08 9:11 ` Rabin Vincent @ 2011-05-13 12:53 ` Kevin Hilman 1 sibling, 0 replies; 4+ messages in thread From: Kevin Hilman @ 2011-05-13 12:53 UTC (permalink / raw) To: Pedanekar, Hemant; +Cc: Rabin Vincent, linux-omap Hi Hemant, "Pedanekar, Hemant" <hemantp@ti.com> writes: > Hello, > > linux-omap-owner@vger.kernel.org wrote on Saturday, May 07, 2011 10:21 PM: > >> On a linux-next kernel built for the Pandaboard, disabling >> CONFIG_OMAP_32K_TIMER makes the kernel use the gptimer as the >> clocksource, but this appears to be non-functional. Judging from the >> all-zeros printk timings and the fact the "sleep 1" hangs indefinitely, >> it looks like the clocksource reads are always zero. >> >> Boot log below and .config attached. Ideas? >> >> [ 0.000000] Linux version 2.6.39-rc6-next-20110506+ (rabin@debian) > [...] >> [ 0.000000] Freeing init memory: 112K > > This looks similar to the issue I observed on TI816X with 32K timer disabled. > > I have created following patch (currently a tempfix) for making timekeeping work > with MPU timer selected (other option is to use ".flags = HWMOD_INIT_NO_RESET" > in hwmod data for the timer used as clocksource): > > commit 77cce922c00ced4407776cc0a1d84cee40b7da90 > Author: Hemant Pedanekar <hemantp@ti.com> > Date: Thu Apr 28 12:59:24 2011 +0530 > > dmtimer: Initialize the hwmod for timer used as clocksource > > Since dmtimer driver still doesn't use hwmods, the 2nd timer used as clocksource > is not set up. The driver will never be the one to init the hwmod, it's up to device level code to do that, so your approach is the right one. > This results into timekeepoing failure when the timer used as > clocksource gets reset during hwmod setup. > > To prevent this, explicitly call omap_hwmod_setup_one() for timer used as > clocksource. > > Note that is is aplpicable when NOT using 32k timer which is the case for typo: applicable > TI816X. For other configurations, this code will not be executed unless 32K > timer is explicitly disabled. Also, you can fix up this changelog to say it's not only for 816x, but for any case where the MPU timer is the clocksource. > Signed-off-by: Hemant Pedanekar <hemantp@ti.com> > > diff --git a/arch/arm/mach-omap2/timer-gp.c b/arch/arm/mach-omap2/timer-gp.c > index 3b9cf85..290fbfa 100644 > --- a/arch/arm/mach-omap2/timer-gp.c > +++ b/arch/arm/mach-omap2/timer-gp.c > @@ -229,6 +229,11 @@ static void __init omap2_gp_clocksource_init(void) > "%s: failed to request dm-timer\n"; > static char err2[] __initdata = KERN_ERR > "%s: can't register clocksource!\n"; > + char clocksource_hwmod_name[8]; /* 8 = sizeof("timerXX0") */ > + > + /* XXX: This may not be always true, we might get different timer */ > + sprintf(clocksource_hwmod_name, "timer%d", gptimer_id + 1); Do you have ideas to make an upstream fix for this? As you already notied, this can't work in the general case (and will fail today on beagle where gptimer_id gets set to 12.) Kevin > + omap_hwmod_setup_one(clocksource_hwmod_name); > > gpt = omap_dm_timer_request(); > if (!gpt) > > Hemant-- > To unsubscribe from this list: send the line "unsubscribe linux-omap" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html ^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2011-05-13 12:53 UTC | newest] Thread overview: 4+ messages (download: mbox.gz follow: Atom feed -- links below jump to the message on this page -- 2011-05-07 16:50 !CONFIG_OMAP_32K_TIMER on OMAP4/panda Rabin Vincent 2011-05-08 4:59 ` Pedanekar, Hemant 2011-05-08 9:11 ` Rabin Vincent 2011-05-13 12:53 ` Kevin Hilman
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