linux-stable.git/drivers/tty/serial/uartlite.c, branch linux-5.17.y

serial: uartlite: Fix BRKINT clearing

2022-06-14T16:41:18+00:00

[ Upstream commit 3f7fed405c118607d4d42255f2572072db728399 ]

BRKINT is within c_iflag rather than c_cflag.

Fixes: ea017f5853e9 (tty: serial: uartlite: Prevent changing fixed parameters)
Reviewed-by: Sean Anderson 
Signed-off-by: Ilpo Järvinen 
Link: https://lore.kernel.org/r/20220519081808.3776-2-ilpo.jarvinen@linux.intel.com
Signed-off-by: Greg Kroah-Hartman 
Signed-off-by: Sasha Levin

tty: serial: uartlite: allow 64 bit address

2021-12-03T13:12:56+00:00

The base address of uartlite registers could be 64 bit address which is from
device resource. When ulite_probe() calls ulite_assign(), this 64 bit
address is casted to 32-bit. The fix is to replace "u32" type with
"phys_addr_t" type for the base address in ulite_assign() argument list.

Fixes: 8fa7b6100693 ("[POWERPC] Uartlite: Separate the bus binding from the driver proper")
Signed-off-by: Lizhi Hou 
Link: https://lore.kernel.org/r/20211129202302.1319033-1-lizhi.hou@xilinx.com
Signed-off-by: Greg Kroah-Hartman

tty: serial: uartlite: Prevent changing fixed parameters

2021-09-14T08:05:32+00:00

This device does not support changing baud, parity, data bits, stop
bits, or detecting breaks. Disable "changing" these settings to prevent
their termios from diverging from the actual state of the uart.

In order to determine the correct parameters to enforce, we read the
various new devicetree parameters to discover how the uart was
configured when it was synthesized. The defaults match
ulite_console_setup. xlnx,use-parity, xlnx,odd-parity, and
xlnx,data-bits are optional since there were in-tree users (and
presumably out-of-tree users) who did not set them.

Signed-off-by: Sean Anderson 
Link: https://lore.kernel.org/r/20210826192154.3202269-5-sean.anderson@seco.com
Signed-off-by: Greg Kroah-Hartman

tty: serial: uartlite: Use read_poll_timeout for a polling loop

2021-08-27T14:34:32+00:00

read_poll_timeout was recently introduced, and can be used to simplify
our console polling loop. This results in a slight reduction in code.
early_uartlite_putc can't get the same treatment, because it can be
called before udelay is set up.

Signed-off-by: Sean Anderson 
Link: https://lore.kernel.org/r/20210826192549.3203071-1-sean.anderson@seco.com
Signed-off-by: Greg Kroah-Hartman

tty: serial: uartlite: Use constants in early_uartlite_putc

2021-08-27T14:34:04+00:00

Use the constants defined at the beginning of this file instead of
integer literals when accessing registers. This makes this code easier
to read, and obviates the need for some explanatory comments.

Signed-off-by: Sean Anderson 
Link: https://lore.kernel.org/r/20210826194323.3209227-1-sean.anderson@seco.com
Signed-off-by: Greg Kroah-Hartman

tty: serial: uartlite: Add runtime pm support

2021-07-21T10:46:52+00:00

In the commit 07e5d4ff125a ("Revert serial-uartlite: Add runtime
support") the runtime pm support was reverted to aid reverting of
the other patches.

This patch adds the runtime PM support back.
The runtime pm calls are used to gate and enable the clocks.

Signed-off-by: Shubhrajyoti Datta 
Link: https://lore.kernel.org/r/20210713064835.27978-3-shubhrajyoti.datta@xilinx.com
Signed-off-by: Greg Kroah-Hartman

tty: serial: uartlite: Disable clocks in case of errors

2021-07-21T10:46:52+00:00

In case the uart registration fails the clocks are left enabled.
Disable the clock in case of errors.

Signed-off-by: Shubhrajyoti Datta 
Link: https://lore.kernel.org/r/20210713064835.27978-2-shubhrajyoti.datta@xilinx.com
Signed-off-by: Greg Kroah-Hartman

serial: tty: uartlite: fix console setup

2021-06-04T13:11:45+00:00

Remove the hack to assign the global console_port variable at probe time.
This assumption that cons->index is -1 is wrong for systems that specify
'console=' in the cmdline (or 'stdout-path' in dts). Hence, on such system
the actual console assignment is ignored, and the first UART that happens
to be probed is used as console instead.

Move the logic to console_setup() and map the console to the correct port
through the array of available ports instead.

Signed-off-by: Daniel Mack 
Link: https://lore.kernel.org/r/20210528133321.1859346-1-daniel@zonque.org
Signed-off-by: Greg Kroah-Hartman

tty: serial: uartlite: Support probe deferral

2020-12-04T15:51:40+00:00

Give uartlite a chance to be probed when IRQ controller will be finally
available and return potential -EPROBE_DEFER as-is. The condition "<="
has been changed to "<" to follow the recommendation in the header of
platform_get_irq().

Signed-off-by: Alexander Sverdlin 
Link: https://lore.kernel.org/r/20201127101953.23700-1-alexander.sverdlin@nokia.com
Signed-off-by: Greg Kroah-Hartman

tty: serial: uartlite: Replace HTTP links with HTTPS ones

2020-07-21T18:04:54+00:00

Rationale:
Reduces attack surface on kernel devs opening the links for MITM
as HTTPS traffic is much harder to manipulate.

Deterministic algorithm:
For each file:
  If not .svg:
    For each line:
      If doesn't contain `\bxmlns\b`:
        For each link, `\bhttp://[^# \t\r\n]*(?:\w|/)`:
	  If neither `\bgnu\.org/license`, nor `\bmozilla\.org/MPL\b`:
            If both the HTTP and HTTPS versions
            return 200 OK and serve the same content:
              Replace HTTP with HTTPS.

Signed-off-by: Alexander A. Klimov 
Link: https://lore.kernel.org/r/20200718100807.983-1-grandmaster@al2klimov.de
Signed-off-by: Greg Kroah-Hartman