linux.git/drivers/tty/serial, branch v5.15-rc2

Merge tag 'for-5.15/parisc' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux

2021-09-02T20:16:00+00:00

Pull parisc architecture updates from Helge Deller:

 - Fix a kernel crash when a signal is delivered to bad userspace stack

 - Fix fall-through warnings in math-emu code

 - Increase size of gcc stack frame check

 - Switch coding from 'pci_' to 'dma_' API

 - Make struct parisc_driver::remove() return void

 - Some parisc related Makefile changes

 - Minor cleanups, e.g. change to octal permissions, fix macro
   collisions, fix PMD_ORDER collision, replace spaces with tabs

* tag 'for-5.15/parisc' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux:
  parisc: math-emu: Fix fall-through warnings
  parisc: fix crash with signals and alloca
  parisc: Fix compile failure when building 64-bit kernel natively
  parisc: ccio-dma.c: Added tab instead of spaces
  parisc/parport_gsc: switch from 'pci_' to 'dma_' API
  parisc: move core-y in arch/parisc/Makefile to arch/parisc/Kbuild
  parisc: switch from 'pci_' to 'dma_' API
  parisc: Make struct parisc_driver::remove() return void
  parisc: remove unused arch/parisc/boot/install.sh and its phony target
  parisc: Rename PMD_ORDER to PMD_TABLE_ORDER
  parisc: math-emu: Avoid "fmt" macro collision
  parisc: Increase size of gcc stack frame check
  parisc: Replace symbolic permissions with octal permissions

parisc: Make struct parisc_driver::remove() return void

2021-08-30T08:18:25+00:00

The caller of this function (parisc_driver_remove() in
arch/parisc/kernel/drivers.c) ignores the return value, so better don't
return any value at all to not wake wrong expectations in driver authors.

The only function that could return a non-zero value before was
ipmi_parisc_remove() which returns the return value of
ipmi_si_remove_by_dev(). Make this function return void, too, as for all
other callers the value is ignored, too.

Also fold in a small checkpatch fix for:

WARNING: Unnecessary space before function pointer arguments
+	void (*remove) (struct parisc_device *dev);

Acked-by: Dmitry Torokhov  (for drivers/input)
Signed-off-by: Uwe Kleine-König 
Acked-by:  Sudip Mukherjee 
Acked-by: Jiri Slaby 
Signed-off-by: Helge Deller

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

serial: vt8500: Use of_device_get_match_data

2021-08-26T12:51:10+00:00

Retrieve OF match data, it's better and cleaner to use
'of_device_get_match_data' over 'of_match_device'.

Signed-off-by: Zhang Shengju 
Signed-off-by: Tang Bin 
Link: https://lore.kernel.org/r/20210822032806.3256-4-tangbin@cmss.chinamobile.com
Signed-off-by: Greg Kroah-Hartman

serial: tegra: Use of_device_get_match_data

2021-08-26T12:51:10+00:00

Retrieve OF match data, it's better and cleaner to use
'of_device_get_match_data' over 'of_match_device'.

Signed-off-by: Zhang Shengju 
Signed-off-by: Tang Bin 
Link: https://lore.kernel.org/r/20210822032806.3256-3-tangbin@cmss.chinamobile.com
Signed-off-by: Greg Kroah-Hartman

serial: 8250_ingenic: Use of_device_get_match_data

2021-08-26T12:51:10+00:00

Retrieve OF match data, it's better and cleaner to use
'of_device_get_match_data' over 'of_match_device'.

Acked-by: Paul Cercueil 
Signed-off-by: Zhang Shengju 
Signed-off-by: Tang Bin 
Link: https://lore.kernel.org/r/20210822032806.3256-2-tangbin@cmss.chinamobile.com
Signed-off-by: Greg Kroah-Hartman

tty: serial: linflexuart: Remove redundant check to simplify the code

2021-08-26T12:51:04+00:00

In the function uart_add_one_port(), it can return zero or non-zero,
so remove redundant check to simplify the code.

Signed-off-by: Zhang Shengju 
Signed-off-by: Tang Bin 
Link: https://lore.kernel.org/r/20210823110754.11232-1-tangbin@cmss.chinamobile.com
Signed-off-by: Greg Kroah-Hartman

tty: serial: fsl_lpuart: do software reset for imx7ulp and imx8qxp

2021-08-26T12:49:20+00:00

Do software reset for communication port on imx7ulp and imx8qxp after
the port is registered if the UART controller support the feature.

Do partition reset with LPUART's power on, LPUART registers will
keep the previous status, like on i.MX8QXP platform, which is not
expected action, so need to set the RST bit of GLOBAL register to reset
all uart internal logic and registers.

Currently, only i.MX7ULP and i.MX8QXP LPUART controllers include
global register that support the software reset.

Signed-off-by: Fugang Duan 
Signed-off-by: Sherry Sun 
Link: https://lore.kernel.org/r/20210823091801.17447-1-sherry.sun@nxp.com
Signed-off-by: Greg Kroah-Hartman

tty: serial: fsl_lpuart: enable two stop bits for lpuart32

2021-08-26T12:49:14+00:00

Add two stop bits support.
User can run the command to enable two stop bits for test:
stty  cstopb  -F /dev/ttyLPx

Signed-off-by: Fugang Duan 
Signed-off-by: Sherry Sun 
Link: https://lore.kernel.org/r/20210823081733.31941-1-sherry.sun@nxp.com
Signed-off-by: Greg Kroah-Hartman