From mboxrd@z Thu Jan 1 00:00:00 1970 From: a.aubert@overkiz.com (Antoine Aubert) Date: Mon, 7 Sep 2015 09:31:07 +0200 Subject: at91sam9 Main crystal frequency problems Message-ID: <55ED3D3B.8060700@overkiz.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org 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: -------------- next part -------------- A non-text attachment was scrubbed... Name: signature.asc Type: application/pgp-signature Size: 473 bytes Desc: OpenPGP digital signature URL: