On 2016-02-29 17:48, Greg KH wrote:
On Mon, Feb 29, 2016 at 01:47:36PM +0100, Sean Nyekjær wrote:
Hi
I'm still having some problems with this driver :-(
I'm using the sc16is750 on an imx6d platform i have tested it with a vanilla
kernel and RT patches applied.
I have our hardware hooked up to a PC using an ttl ftdi chip, both the
sc16is750 and the ftdi is setup:
$ stty -F /dev/tty[dev] 115200 raw -echo
From the PC I cat a large file:
$ cat /var/log/pacman.log > /dev/ttyUSB3
And on the imx I open and closes cat:
$ cat /dev/ttySC0
[2014-09-17 08:08] [ALPM-SCRIPTLET] gpg: next trustdb check due at
2015-03-31
[2014-09-17 08:08] [PACMAN] upgraded archlinux-keyring (20140220-1 ->
20140908-1)
[2014-09-17 08:08] [PACMAN] upgraded linux-api-headers (3.14.1-1 ->
3.16.2-1)
[2014-09-17 08:08] [ALPM] warning: /etc/locale.gen installed as
/etc/locale.gen.pacnew
[2014-09-17 08:08] [ALPM-SCRIPTLET] Generating locales...
[2014-09-17 08:08] [ALPM-SCRIPTLET] en_DK.UTF-8... done
...
Waiting for data to flow and closes og repeates again, most of the time data
is flowing perfectly but sometimes the whole datastream is containing
invalid chars:
$ cat /dev/ttySC0
'cat' is never a good thing to use for serial ports, try using something
like minicom or another program that knows it is talking to a serial
device.
thanks,
greg k-h
Ops
If I open the serialport with minicom it's not pretty :-)
$ minicom -D /dev/ttySC0 -b 115200
BUG: scheduling while atomic: minicom/287/0x00000002
3 locks held by minicom/287:
#0: (&port->mutex){......}, at: [<80282bf8>] uart_tiocmget+0x20/0x6c
#1: (&port_lock_key){......}, at: [<80282c10>] uart_tiocmget+0x38/0x6c
#2: (&map->mutex){......}, at: [<802a759c>] regmap_read+0x30/0x60
Modules linked in: sc16is7xx regmap_spi usb_f_acm u_serial usb_f_rndis
g_multi u_ether usb_f_mass_storage libcomposite
Preemption disabled at:[< (null)>] (null)
CPU: 0 PID: 287 Comm: minicom Not tainted 4.1.15-00136-g27ad049-dirty #7
Hardware name: Freescale i.MX6 Quad/DualLite (Device Tree)
[<80016850>] (unwind_backtrace) from [<800128a8>] (show_stack+0x10/0x14)
[<800128a8>] (show_stack) from [<804ab1f4>] (dump_stack+0x80/0xc0)
[<804ab1f4>] (dump_stack) from [<804a8bec>] (__schedule_bug+0xb0/0xc4)
[<804a8bec>] (__schedule_bug) from [<804ad1d8>] (__schedule+0x4bc/0x534)
[<804ad1d8>] (__schedule) from [<804ad290>] (schedule+0x40/0x98)
[<804ad290>] (schedule) from [<804ad5f0>]
(schedule_preempt_disabled+0x14/0x20)
[<804ad5f0>] (schedule_preempt_disabled) from [<804af30c>]
(mutex_lock_nested+0x1b4/0x444)
[<804af30c>] (mutex_lock_nested) from [<802a759c>] (regmap_read+0x30/0x60)
[<802a759c>] (regmap_read) from [<7f04a494>]
(sc16is7xx_port_read+0x2c/0x38 [sc16is7xx])
[<7f04a494>] (sc16is7xx_port_read [sc16is7xx]) from [<7f04a4ac>]
(sc16is7xx_get_mctrl+0xc/0x4c [sc16is7xx])
[<7f04a4ac>] (sc16is7xx_get_mctrl [sc16is7xx]) from [<80282c20>]
(uart_tiocmget+0x48/0x6c)
[<80282c20>] (uart_tiocmget) from [<8026ade8>] (tty_ioctl+0x46c/0xc84)
[<8026ade8>] (tty_ioctl) from [<800f7740>] (do_vfs_ioctl+0x428/0x67c)
[<800f7740>] (do_vfs_ioctl) from [<800f79c8>] (SyS_ioctl+0x34/0x5c)
[<800f79c8>] (SyS_ioctl) from [<8000f440>] (ret_fast_syscall+0x0/0x3c)
BUG: scheduling while atomic: minicom/287/0x00000002
4 locks held by minicom/287:
#0: (&port->mutex){......}, at: [<80282bf8>] uart_tiocmget+0x20/0x6c
#1: (&port_lock_key){......}, at: [<80282c10>] uart_tiocmget+0x38/0x6c
#2: (&map->mutex){......}, at: [<802a759c>] regmap_read+0x30/0x60
#3: (lock#2){......}, at: [<802d4b44>] spi_write_then_read+0x124/0x184
Modules linked in: sc16is7xx regmap_spi usb_f_acm u_serial usb_f_rndis
g_multi u_ether usb_f_mass_storage libcomposite
Preemption disabled at:[< (null)>] (null)
CPU: 0 PID: 287 Comm: minicom Tainted: G W
4.1.15-00136-g27ad049-dirty #7
Hardware name: Freescale i.MX6 Quad/DualLite (Device Tree)
[<80016850>] (unwind_backtrace) from [<800128a8>] (show_stack+0x10/0x14)
[<800128a8>] (show_stack) from [<804ab1f4>] (dump_stack+0x80/0xc0)
[<804ab1f4>] (dump_stack) from [<804a8bec>] (__schedule_bug+0xb0/0xc4)
[<804a8bec>] (__schedule_bug) from [<804ad1d8>] (__schedule+0x4bc/0x534)
[<804ad1d8>] (__schedule) from [<804ad290>] (schedule+0x40/0x98)
[<804ad290>] (schedule) from [<804b1538>] (schedule_timeout+0x154/0x194)
[<804b1538>] (schedule_timeout) from [<804adccc>]
(wait_for_common+0xb4/0x144)
[<804adccc>] (wait_for_common) from [<802d6b38>]
(spi_imx_transfer+0x26c/0x368)
[<802d6b38>] (spi_imx_transfer) from [<802d5aa0>]
(spi_bitbang_transfer_one+0xa4/0x22c)
[<802d5aa0>] (spi_bitbang_transfer_one) from [<802d474c>]
(__spi_pump_messages+0x380/0x4cc)
[<802d474c>] (__spi_pump_messages) from [<802d4a08>]
(__spi_sync+0x164/0x16c)
[<802d4a08>] (__spi_sync) from [<802d4aec>] (spi_write_then_read+0xcc/0x184)
[<802d4aec>] (spi_write_then_read) from [<802a7a84>]
(_regmap_raw_read+0x98/0xf4)
[<802a7a84>] (_regmap_raw_read) from [<802a7b04>]
(_regmap_bus_read+0x24/0x5c)
[<802a7b04>] (_regmap_bus_read) from [<802a74f4>] (_regmap_read+0x6c/0xe4)
[<802a74f4>] (_regmap_read) from [<802a75ac>] (regmap_read+0x40/0x60)
[<802a75ac>] (regmap_read) from [<7f04a494>]
(sc16is7xx_port_read+0x2c/0x38 [sc16is7xx])
[<7f04a494>] (sc16is7xx_port_read [sc16is7xx]) from [<7f04a4ac>]
(sc16is7xx_get_mctrl+0xc/0x4c [sc16is7xx])
[<7f04a4ac>] (sc16is7xx_get_mctrl [sc16is7xx]) from [<80282c20>]
(uart_tiocmget+0x48/0x6c)
[<80282c20>] (uart_tiocmget) from [<8026ade8>] (tty_ioctl+0x46c/0xc84)
[<8026ade8>] (tty_ioctl) from [<800f7740>] (do_vfs_ioctl+0x428/0x67c)
[<800f7740>] (do_vfs_ioctl) from [<800f79c8>] (SyS_ioctl+0x34/0x5c)
[<800f79c8>] (SyS_ioctl) from [<8000f440>] (ret_fast_syscall+0x0/0x3c)
/Sean
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