Hi,
I am trying to cleanup and use HDQ 1wire on AM43x with
3.12-rc6 kernel.
Slave device connected on my board is DS18B20, for which I have
enabled the w1_therm.c driver. I populated the required hwmod entries and
the log obtained is inlined[1].
Is there any way to test this out?
In some older thread, I saw that there is some discussion on some
'hdq idle fixes' done to get the hdq working. ?
I see a lot of sys entires, but all looks to be the attributes and could
not
figure out any slave where I can 'cat' the temperature data.
Do I need to enable anything more apart from what my below configs looks
like:
#
CONFIG_W1=y
CONFIG_W1_CON=y
#
# 1-wire Bus Masters
#
# CONFIG_W1_MASTER_DS2490 is not set
# CONFIG_W1_MASTER_DS2482 is not set
# CONFIG_W1_MASTER_DS1WM is not set
# CONFIG_W1_MASTER_GPIO is not set
CONFIG_HDQ_MASTER_OMAP=y
#
# 1-wire Slaves
#
CONFIG_W1_SLAVE_THERM=y
Thanks,
Sourav
[1]:
Starting kernel ...
[ 0.000000] Booting Linux on physical CPU 0x0
[ 0.000000] Linux version 3.12.0-67367-g2d1978c-dirty
(a0131647@a0131647) (gcc version 4.7.3 20130226 (prerelease)
(crosstool-NG linaro-1.13.1-4.7-2013.03
[ 0.000000] CPU: ARMv7 Processor [412fc09a] revision 10 (ARMv7),
cr=10c53c7d
[ 0.000000] CPU: PIPT / VIPT nonaliasing data cache, VIPT aliasing
instruction cache
[ 0.000000] Machine: Generic AM43 (Flattened Device Tree), model: TI
AM43x EPOS EVM
[ 0.000000] cma: CMA: reserved 16 MiB at 9e800000
[ 0.000000] Memory policy: ECC disabled, Data cache writeback
[ 0.000000] CPU: All CPU(s) started in SVC mode.
[ 0.000000] AM437x ES1.0 (sgx neon )
[ 0.000000] PERCPU: Embedded 9 pages/cpu @c12c9000 s14656 r8192
d14016 u36864
[ 0.000000] Built 1 zonelists in Zone order, mobility grouping on.
Total pages: 129280
[ 0.000000] Kernel command line: root=/dev/ram0 rw mem=512M
console=ttyO0,115200n8 initrd=0x82000000,20M ramdisk_size=20480
no_console_suspend
[ 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: 464604K/521216K available (6012K kernel code,
690K rwdata, 2340K rodata, 426K init, 5536K bss, 56612K 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] vmalloc : 0xe0800000 - 0xff000000 ( 488 MB)
[ 0.000000] lowmem : 0xc0000000 - 0xe0000000 ( 512 MB)
[ 0.000000] pkmap : 0xbfe00000 - 0xc0000000 ( 2 MB)
[ 0.000000] modules : 0xbf000000 - 0xbfe00000 ( 14 MB)
[ 0.000000] .text : 0xc0008000 - 0xc083058c (8354 kB)
[ 0.000000] .init : 0xc0831000 - 0xc089b940 ( 427 kB)
[ 0.000000] .data : 0xc089c000 - 0xc0948b20 ( 691 kB)
[ 0.000000] .bss : 0xc0948b20 - 0xc0eb0f00 (5537 kB)
[ 0.000000] Hierarchical RCU implementation.
[ 0.000000] RCU restricting CPUs from NR_CPUS=2 to nr_cpu_ids=1.
[ 0.000000] NR_IRQS:16 nr_irqs:16 16
[ 0.000000] GIC CPU mask not found - kernel will fail to boot.
[ 0.000000] GIC CPU mask not found - kernel will fail to boot.
[ 0.000000] OMAP clockevent source: timer1 at 32786 Hz
[ 0.000000] sched_clock: 32 bits at 32kHz, resolution 30517ns, wraps
every 131071999ms
[ 0.000000] OMAP clocksource: 32k_counter at 32768 Hz
[ 0.000000] Console: colour dummy device 80x30
.....
[ 2.861450] Driver for 1-wire Dallas network protocol.
[ 2.878417] omap_hdq 48347000.hdq: OMAP HDQ Hardware Rev 0.:. Driver
in Interrupt mode
[ 3.250061] w1_master_driver w1_bus_master1: Family 1 for
01.000000000000.3d is not registered.
[ 3.262054] omap_wdt: OMAP Watchdog Timer Rev 0x01: initial timeout
60 sec
[ 3.275054] edma-dma-engine edma-dma-engine.0: allocated channel for 0:25
[ 3.282073] edma-dma-engine edma-dma-engine.0: allocated channel for 0:24
[ 3.336029] ledtrig-cpu: registered to indicate activity on CPUs
[ 3.342712] edma-dma-engine edma-dma-engine.0: allocated channel for 0:36
[ 3.349639] omap-sham 53100000.sham: hw accel on OMAP rev 0.0
[ 3.364746] omap-aes 53501000.aes: OMAP AES hw accel rev: 0.1
[ 3.370758] edma-dma-engine edma-dma-engine.0: allocated channel for 0:5
......
[ 3.675811] platform connector.6: Driver connector-hdmi requests
probe deferral
[ 3.687438] drivers/rtc/hctosys.c: unable to open rtc device (rtc0)
[ 3.712982] RAMDISK: ext2 filesystem found at block 0
[ 3.718017] RAMDISK: Loading 15360KiB [1 disk] into ram disk... [
3.724517] connector-hdmi connector.6: failed to find video source
[ 3.730957] platform connector.6: Driver connector-hdmi requests
probe deferral
done.
[ 4.392822] EXT2-fs (ram0): warning: mounting unchecked fs, running
e2fsck is recommended
[ 4.401641] VFS: Mounted root (ext2 filesystem) on device 1:0.
[ 4.408569] devtmpfs: mounted
[ 4.412353] Freeing unused kernel memory: 424K (c0831000 - c089b000)
Mounting proc : OK
Mounting sysfs : OK
Mounting /dev : OK
Creating local mdev devices
umount: can't umount /mnt/mmc: Invalid argument
***********************************************
Starting System Init for: Generic AM43 (Flattened Device Tree)
Release: 3.12.0-67367-g2d1978c-dirty
***********************************************
Saving kernel ring buffer : OK
Mounting devpts : OK
Setting up networking
Configuring lo : OK
Configuring eth0 : ifup: can't open '/etc/network/interfaces': No such
file or directory
Failed
Starting syslogd : OK
Starting klogd : OK
Mounting filesystems : OK
Mounting Debug filesystem : OK
Please press Enter to activate this console.
/ #
/ # cd /
/ #
/ #
/ # cd /sys/bus/
/sys/bus # ls
clockevents event_source mdio_bus scsi soc w1
clocksource hid mmc sdio spi
workqueue
cpu i2c platform serio usb
/sys/bus # cd w1/
/sys/bus/w1 # ls
devices drivers_autoprobe uevent
drivers drivers_probe
/sys/bus/w1 # cd devices/
/sys/bus/w1/devices # ls
01-000000000000 w1_bus_master1
/sys/bus/w1/devices # cd w1_bus_master1/
/sys/devices/w1_bus_master1 # ls
01-000000000000 w1_master_attempts w1_master_search
driver w1_master_max_slave_count w1_master_slave_count
power w1_master_name w1_master_slaves
subsystem w1_master_pointer w1_master_timeout
uevent w1_master_pullup
w1_master_add w1_master_remove
/sys/devices/w1_bus_master1 # cd ..
/sys/bus/w1/devices # ls
01-000000000000 w1_bus_master1
/sys/bus/w1/devices # cd ..
/sys/bus/w1 # ls
devices drivers_autoprobe uevent
drivers drivers_probe
/sys/bus/w1 # cd drivers/
/sys/bus/w1/drivers # ls
w1_master_driver w1_slave_driver
/sys/bus/w1/drivers # cd w1_master_driver/
/sys/bus/w1/drivers/w1_master_driver # ls
bind uevent unbind w1_bus_master1
/sys/bus/w1/drivers/w1_master_driver # cd w1_bus_master1/
/sys/devices/w1_bus_master1 # ls
01-000000000000 w1_master_attempts w1_master_search
driver w1_master_max_slave_count w1_master_slave_count
power w1_master_name w1_master_slaves
subsystem w1_master_pointer w1_master_timeout
uevent w1_master_pullup
w1_master_add w1_master_remove
/sys/devices/w1_bus_master1 # cd ..
/sys/bus/w1/drivers/w1_master_driver # cd ..
/sys/bus/w1/drivers # ls
w1_master_driver w1_slave_driver
/sys/bus/w1/drivers # cd w1_slave_driver/
/sys/bus/w1/drivers/w1_slave_driver # ls
01-000000000000 bind uevent unbind
/sys/bus/w1/drivers/w1_slave_driver # cd 01-000000000000/
/sys/devices/w1_bus_master1/01-000000000000 # ls
driver id name power rw subsystem uevent
/sys/devices/w1_bus_master1/01-000000000000 #
/sys/devices/w1_bus_master1/01-000000000000 #
/sys/devices/w1_bus_master1/01-000000000000 # cd ..
/sys/bus/w1/drivers/w1_slave_driver # cd
/ # cd /sys/class/
/sys/class # ls
ata_device extcon input mmc_host rtc ubi
ata_link firmware lcd mtd scsi_device udc
ata_port gpio leds net scsi_disk usbmon
backlight graphics mbox phy scsi_host vc
bdi hwmon mdio_bus power_supply spi_master
vtconsole
block i2c-adapter mem pwm thermal
watchdog
dma i2c-dev misc regulator tty
/sys/class # cd ..
/sys # cd ..
/ #
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