at91sam9 Main crystal frequency problems
Antoine Aubert
a.aubert at overkiz.com
Mon Sep 7 00:31:07 PDT 2015
Hi,
I currently bring up a board based on AT91SAM9G25cu, and I having
problems of watchdogs resets.
We use linux-4.04 mainline, and i found some weird warnings on kernel
traces, concerning main clk.
[ 0.000000] Main crystal frequency not set, using approximate value
[ 0.000000] master clk is overclocked
[ 0.000000] sched_clock: 32 bits at 128 Hz, resolution 7812500ns,
wraps every 16777216000000000ns
[ 0.007812] Calibrating delay loop... 198.76 BogoMIPS (lpj=775168)
I set crystal clock in the DT, but it doesn't seems to work.. I feel
that the board works out of the specified range.
So here comes my questions:
Can there be a relationship with watchdog problems ? (1 per day)
Why is it that the frequency of Crystal is not found ?
I attached my DT, and kernel prints.
Thanks for your help.
--
Antoine Aubert
a.aubert at overkiz.com
-------------- next part --------------
ll /proc/device-tree/clocks/*
-r--r--r-- 1 root root 7 Sep 7 09:13 /proc/device-tree/clocks/name
/proc/device-tree/clocks/adc_op_clk:
-r--r--r-- 1 root root 4 Sep 7 09:14 #clock-cells
-r--r--r-- 1 root root 4 Sep 7 09:14 clock-frequency
-r--r--r-- 1 root root 12 Sep 7 09:14 compatible
-r--r--r-- 1 root root 4 Sep 7 09:14 linux,phandle
-r--r--r-- 1 root root 11 Sep 7 09:14 name
-r--r--r-- 1 root root 4 Sep 7 09:14 phandle
/proc/device-tree/clocks/main_xtal:
-r--r--r-- 1 root root 4 Sep 7 09:14 #clock-cells
-r--r--r-- 1 root root 4 Sep 7 09:14 clock-frequency
-r--r--r-- 1 root root 12 Sep 7 09:14 compatible
-r--r--r-- 1 root root 4 Sep 7 09:14 linux,phandle
-r--r--r-- 1 root root 10 Sep 7 09:14 name
-r--r--r-- 1 root root 4 Sep 7 09:14 phandle
/proc/device-tree/clocks/slow_xtal:
-r--r--r-- 1 root root 4 Sep 7 09:14 #clock-cells
-r--r--r-- 1 root root 4 Sep 7 09:14 clock-frequency
-r--r--r-- 1 root root 12 Sep 7 09:14 compatible
-r--r--r-- 1 root root 4 Sep 7 09:14 linux,phandle
-r--r--r-- 1 root root 10 Sep 7 09:14 name
-r--r--r-- 1 root root 4 Sep 7 09:14 phandle
-------------- next part --------------
cat /sys/kernel/debug/clk/clk_summary
clock enable_cnt prepare_cnt rate accuracy phase
----------------------------------------------------------------------------------------
slow_xtal 0 0 32768 0 0
slow_osc 0 0 32768 0 0
main_xtal 1 1 12000000 0 0
main_osc 1 1 12000000 0 0
mainck 2 2 12000000 0 0
utmick 2 2 480000000 0 0
usbck 2 2 48000000 0 0
udpck 0 0 48000000 0 0
uhpck 1 1 48000000 0 0
pllack 1 1 800000000 0 0
plladivck 1 1 400000000 0 0
smdclk 0 0 400000000 0 0
smdck 0 0 400000000 0 0
masterck 11 11 133333333 0 0
ddrck 1 1 133333333 0 0
usart3_clk 0 0 133333333 0 0
usart2_clk 0 0 133333333 0 0
usart1_clk 0 0 133333333 0 0
usart0_clk 1 1 133333333 0 0
uhphs_clk 3 3 133333333 0 0
udphs_clk 0 0 133333333 0 0
uart1_clk 0 0 133333333 0 0
uart0_clk 0 0 133333333 0 0
twi2_clk 0 0 133333333 0 0
twi1_clk 0 0 133333333 0 0
twi0_clk 0 0 133333333 0 0
tcb0_clk 2 2 133333333 0 0
ssc0_clk 0 0 133333333 0 0
spi1_clk 0 0 133333333 0 0
spi0_clk 0 0 133333333 0 0
smd_clk 0 0 133333333 0 0
pwm_clk 2 1 133333333 0 0
pioCD_clk 2 2 133333333 0 0
pioAB_clk 2 2 133333333 0 0
mci1_clk 0 0 133333333 0 0
mci0_clk 0 0 133333333 0 0
macb0_clk 2 2 133333333 0 0
dma1_clk 1 1 133333333 0 0
dma0_clk 1 1 133333333 0 0
adc_clk 0 0 133333333 0 0
adc_op_clk 0 0 5000000 0 0
slow_rc_osc 1 1 32768 50000000 0
slck 1 1 32768 50000000 0
prog0 0 0 32768 50000000 0
pck0 0 0 32768 50000000 0
prog1 0 0 32768 50000000 0
pck1 0 0 32768 50000000 0
main_rc_osc 0 0 12000000 50000000 0
-------------- next part --------------
[ 0.000000] Booting Linux on physical CPU 0x0
[ 0.000000] Linux version 4.0.4 (antoine at compile-embedded) (gcc version 4.9.1 (GCC) ) #1 Thu Sep 3 09:25:30 CEST 2015
[ 0.000000] CPU: ARM926EJ-S [41069265] revision 5 (ARMv5TEJ), cr=0005317f
[ 0.000000] CPU: VIVT data cache, VIVT instruction cache
[ 0.000000] Machine model: Overkiz Kizbox mini
[ 0.000000] bootconsole [earlycon0] enabled
[ 0.000000] Memory policy: Data cache writeback
[ 0.000000] AT91: Detected soc type: at91sam9x5
[ 0.000000] AT91: Detected soc subtype: at91sam9g25
[ 0.000000] On node 0 totalpages: 32768
[ 0.000000] free_area_init_node: node 0, pgdat c03dabac, node_mem_map c7ef9000
[ 0.000000] Normal zone: 256 pages used for memmap
[ 0.000000] Normal zone: 0 pages reserved
[ 0.000000] Normal zone: 32768 pages, LIFO batch:7
[ 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: 32512
[ 0.000000] Kernel command line: panic=5 root=ubi0:root rootfstype=ubifs rw ubi.mtd=ubi console=ttyS0,115200 earlyprintk
[ 0.000000] PID hash table entries: 512 (order: -1, 2048 bytes)
[ 0.000000] Dentry cache hash table entries: 16384 (order: 4, 65536 bytes)
[ 0.000000] Inode-cache hash table entries: 8192 (order: 3, 32768 bytes)
[ 0.000000] Memory: 125616K/131072K available (2698K kernel code, 133K rwdata, 988K rodata, 128K init, 194K bss, 5456K reserved, 0K cma-reserved)
[ 0.000000] Virtual kernel memory layout:
[ 0.000000] vector : 0xffff0000 - 0xffff1000 ( 4 kB)
[ 0.000000] fixmap : 0xffc00000 - 0xfff00000 (3072 kB)
[ 0.000000] vmalloc : 0xc8800000 - 0xff000000 ( 872 MB)
[ 0.000000] lowmem : 0xc0000000 - 0xc8000000 ( 128 MB)
[ 0.000000] modules : 0xbf000000 - 0xc0000000 ( 16 MB)
[ 0.000000] .text : 0xc0008000 - 0xc03a1f54 (3688 kB)
[ 0.000000] .init : 0xc03a2000 - 0xc03c2000 ( 128 kB)
[ 0.000000] .data : 0xc03c2000 - 0xc03e37c0 ( 134 kB)
[ 0.000000] .bss : 0xc03e37c0 - 0xc0414394 ( 195 kB)
[ 0.000000] NR_IRQS:16 nr_irqs:16 16
[ 0.000000] Main crystal frequency not set, using approximate value
[ 0.000000] master clk is overclocked
[ 0.000000] sched_clock: 32 bits at 128 Hz, resolution 7812500ns, wraps every 16777216000000000ns
[ 0.007812] Calibrating delay loop... 198.76 BogoMIPS (lpj=775168)
[ 0.070312] pid_max: default: 32768 minimum: 301
[ 0.078125] Mount-cache hash table entries: 1024 (order: 0, 4096 bytes)
[ 0.085937] Mountpoint-cache hash table entries: 1024 (order: 0, 4096 bytes)
[ 0.093750] CPU: Testing write buffer coherency: ok
[ 0.101562] Setting up static identity map for 0x20290e20 - 0x20290e9c
[ 0.109375] devtmpfs: initialized
[ 0.117187] pinctrl core: initialized pinctrl subsystem
[ 0.148437] NET: Registered protocol family 16
[ 0.156250] DMA: preallocated 256 KiB pool for atomic coherent allocations
[ 0.179687] AT91: Power Management
[ 0.187500] gpio-at91 fffff400.gpio: at address fefff400
[ 0.195312] gpio-at91 fffff600.gpio: at address fefff600
[ 0.203125] gpio-at91 fffff800.gpio: at address fefff800
[ 0.210937] gpio-at91 fffffa00.gpio: at address fefffa00
[ 0.218750] pinctrl-at91 ahb:apb:pinctrl at fffff400: initialized AT91 pinctrl driver
[ 0.226562] tcb_clksrc: tc0 at 16.166 MHz
[ 0.265625] at_hdmac ffffec00.dma-controller: Atmel AHB DMA Controller ( cpy slave ), 8 channels
[ 0.281250] at_hdmac ffffee00.dma-controller: Atmel AHB DMA Controller ( cpy slave ), 8 channels
[ 0.296875] usbcore: registered new interface driver usbfs
[ 0.296875] usbcore: registered new interface driver hub
[ 0.304687] usbcore: registered new device driver usb
[ 0.312500] Switched to clocksource tcb_clksrc
[ 0.335937] NET: Registered protocol family 2
[ 0.335937] TCP established hash table entries: 1024 (order: 0, 4096 bytes)
[ 0.343750] TCP bind hash table entries: 1024 (order: 0, 4096 bytes)
[ 0.351562] TCP: Hash tables configured (established 1024 bind 1024)
[ 0.359375] TCP: reno registered
[ 0.359375] UDP hash table entries: 256 (order: 0, 4096 bytes)
[ 0.367187] UDP-Lite hash table entries: 256 (order: 0, 4096 bytes)
[ 0.375000] NET: Registered protocol family 1
[ 0.382812] futex hash table entries: 256 (order: -1, 3072 bytes)
[ 0.390625] squashfs: version 4.0 (2009/01/31) Phillip Lougher
[ 0.398437] io scheduler noop registered (default)
[ 0.406250] f801c000.serial: ttyS1 at MMIO 0xf801c000 (irq = 30, base_baud = 8333333) is a ATMEL_SERIAL
[ 0.414062] fffff200.serial: ttyS0 at MMIO 0xfffff200 (irq = 16, base_baud = 8333333) is a ATMEL_SERIAL
[ 0.421875] console [ttyS0] enabled
[ 0.429687] bootconsole [earlycon0] disabled
[ 0.453125] brd: module loaded
[ 0.476562] loop: module loaded
[ 0.492187] atmel_nand 40000000.nand: Use On Flash BBT
[ 0.492187] atmel_nand 40000000.nand: Using dma0chan0 for DMA transfers.
[ 0.500000] nand: device found, Manufacturer ID: 0x01, Chip ID: 0xf1
[ 0.507812] nand: AMD/Spansion S34ML01G2
[ 0.507812] nand: 128 MiB, SLC, erase size: 128 KiB, page size: 2048, OOB size: 64
[ 0.515625] atmel_nand 40000000.nand: minimum ECC: 4 bits in 512 bytes
[ 0.523437] atmel_nand 40000000.nand: Initialize PMECC params, cap: 4, sector: 512
[ 0.531250] Bad block table found at page 65472, version 0x01
[ 0.539062] Bad block table found at page 65408, version 0x01
[ 0.546875] 2 ofpart partitions found on MTD device atmel_nand
[ 0.546875] Creating 2 MTD partitions on "atmel_nand":
[ 0.554687] 0x000000000000-0x000000020000 : "bootstrap"
[ 0.562500] 0x000000020000-0x000008000000 : "ubi"
[ 0.578125] macb f802c000.ethernet (unnamed net_device) (uninitialized): invalid hw address, using random
[ 0.585937] libphy: MACB_mii_bus: probed
[ 0.671875] macb f802c000.ethernet eth0: Cadence MACB rev 0x0001010c at 0xf802c000 irq 26 (0a:90:3d:11:5b:1c)
[ 0.679687] macb f802c000.ethernet eth0: attached PHY driver [Micrel KSZ8081 or KSZ8091] (mii_bus:phy_addr=f802c000.etherne:01, irq=-1)
[ 0.687500] ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver
[ 0.695312] ehci-atmel: EHCI Atmel driver
[ 0.695312] atmel-ehci 700000.ehci: EHCI Host Controller
[ 0.703125] atmel-ehci 700000.ehci: new USB bus registered, assigned bus number 1
[ 0.710937] atmel-ehci 700000.ehci: irq 32, io mem 0x00700000
[ 0.734375] atmel-ehci 700000.ehci: USB 2.0 started, EHCI 1.00
[ 0.734375] usb usb1: New USB device found, idVendor=1d6b, idProduct=0002
[ 0.742187] usb usb1: New USB device strings: Mfr=3, Product=2, SerialNumber=1
[ 0.750000] usb usb1: Product: EHCI Host Controller
[ 0.750000] usb usb1: Manufacturer: Linux 4.0.4 ehci_hcd
[ 0.757812] usb usb1: SerialNumber: 700000.ehci
[ 0.765625] hub 1-0:1.0: USB hub found
[ 0.765625] hub 1-0:1.0: 3 ports detected
[ 0.773437] ohci_hcd: USB 1.1 'Open' Host Controller (OHCI) Driver
[ 0.781250] ohci-atmel: OHCI Atmel driver
[ 0.781250] at91_ohci 600000.ohci: USB Host Controller
[ 0.789062] at91_ohci 600000.ohci: new USB bus registered, assigned bus number 2
[ 0.796875] at91_ohci 600000.ohci: irq 32, io mem 0x00600000
[ 0.859375] usb usb2: New USB device found, idVendor=1d6b, idProduct=0001
[ 0.867187] usb usb2: New USB device strings: Mfr=3, Product=2, SerialNumber=1
[ 0.875000] usb usb2: Product: USB Host Controller
[ 0.875000] usb usb2: Manufacturer: Linux 4.0.4 ohci_hcd
[ 0.882812] usb usb2: SerialNumber: at91
[ 0.890625] hub 2-0:1.0: USB hub found
[ 0.890625] hub 2-0:1.0: 1 port detected
[ 0.898437] AT91: Starting after general reset
[ 0.906250] at91sam9_wdt: enabled (heartbeat=15 sec, nowayout=1)
[ 0.914062] hidraw: raw HID events driver (C) Jiri Kosina
[ 0.914062] usbcore: registered new interface driver usbhid
[ 0.921875] usbhid: USB HID core driver
[ 0.929687] TCP: cubic registered
[ 0.929687] NET: Registered protocol family 17
[ 0.945312] ubi0: attaching mtd1
[ 1.343750] ubi0: scanning is finished
[ 1.367187] ubi0: attached mtd1 (name "ubi", size 127 MiB)
[ 1.375000] ubi0: PEB size: 131072 bytes (128 KiB), LEB size: 126976 bytes
[ 1.382812] ubi0: min./max. I/O unit sizes: 2048/2048, sub-page size 2048
[ 1.390625] ubi0: VID header offset: 2048 (aligned 2048), data offset: 4096
[ 1.390625] ubi0: good PEBs: 1019, bad PEBs: 4, corrupted PEBs: 0
[ 1.398437] ubi0: user volume: 9, internal volumes: 1, max. volumes count: 128
[ 1.406250] ubi0: max/mean erase counter: 2/1, WL threshold: 4096, image sequence number: 288141040
[ 1.414062] ubi0: available PEBs: 102, total reserved PEBs: 917, PEBs reserved for bad PEB handling: 16
[ 1.421875] ubi0: background thread "ubi_bgt0d" started, PID 292
[ 1.468750] input: gpio_keys as /devices/platform/gpio_keys/input/input0
[ 1.500000] UBIFS: background thread "ubifs_bgt0_7" started, PID 351
[ 1.515625] UBIFS: recovery needed
[ 1.593750] UBIFS: recovery completed
[ 1.593750] UBIFS: mounted UBI device 0, volume 7, name "root"
[ 1.601562] UBIFS: LEB size: 126976 bytes (124 KiB), min./max. I/O unit sizes: 2048 bytes/2048 bytes
[ 1.609375] UBIFS: FS size: 49393664 bytes (47 MiB, 389 LEBs), journal size 9023488 bytes (8 MiB, 72 LEBs)
[ 1.617187] UBIFS: reserved for root: 0 bytes (0 KiB)
[ 1.617187] UBIFS: media format: w4/r0 (latest is w4/r0), UUID 778BA019-0C14-4BE8-857A-A31BF387B571, small LPT model
[ 1.625000] VFS: Mounted root (ubifs filesystem) on device 0:13.
[ 1.632812] devtmpfs: mounted
[ 1.632812] Freeing unused kernel memory: 128K (c03a2000 - c03c2000)
[ 2.695312] random: dd urandom read with 54 bits of entropy available
[ 3.000000] UBIFS: background thread "ubifs_bgt0_8" started, PID 415
[ 3.023437] UBIFS: recovery needed
[ 3.148437] UBIFS: recovery completed
[ 3.148437] UBIFS: mounted UBI device 0, volume 8, name "apps"
[ 3.156250] UBIFS: LEB size: 126976 bytes (124 KiB), min./max. I/O unit sizes: 2048 bytes/2048 bytes
[ 3.164062] UBIFS: FS size: 49393664 bytes (47 MiB, 389 LEBs), journal size 9023488 bytes (8 MiB, 72 LEBs)
[ 3.171875] UBIFS: reserved for root: 0 bytes (0 KiB)
[ 3.171875] UBIFS: media format: w4/r0 (latest is w4/r0), UUID B11D014C-5838-40FE-AE66-E6FAE0EC2398, small LPT model
[ 5.671875] macb f802c000.ethernet eth0: link up (100/Full)
[ 10.914062] random: nonblocking pool is initialized
-------------- next part --------------
A non-text attachment was scrubbed...
Name: at91-kizboxmini.dts
Type: audio/vnd.dts
Size: 2484 bytes
Desc: not available
URL: <http://lists.infradead.org/pipermail/linux-arm-kernel/attachments/20150907/06bcf6f1/attachment-0001.dts>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 473 bytes
Desc: OpenPGP digital signature
URL: <http://lists.infradead.org/pipermail/linux-arm-kernel/attachments/20150907/06bcf6f1/attachment-0001.sig>
More information about the linux-arm-kernel
mailing list