linux.git/drivers/tty/serial/8250, branch v6.11

Revert "serial: 8250_omap: Set the console genpd always on if no console suspend"

2024-08-15T05:22:10+00:00

This reverts commit 68e6939ea9ec3d6579eadeab16060339cdeaf940.

Kevin reported that this causes a crash during suspend on platforms that
dont use PM domains.

Link: https://lore.kernel.org/r/7ha5hgpchq.fsf@baylibre.com
Cc: Thomas Richard 
Fixes: 68e6939ea9ec ("serial: 8250_omap: Set the console genpd always on if no console suspend")
Cc: stable 
Reported-by: Kevin Hilman 
Signed-off-by: Griffin Kroah-Hartman 
Link: https://lore.kernel.org/r/20240814111747.82371-1-griffin@kroah.com
Signed-off-by: Greg Kroah-Hartman

Merge tag 'tty-6.11-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty

2024-07-19T22:22:14+00:00

Pull tty / serial updates from Greg KH:
 "Here is a small set of tty and serial driver updates for 6.11-rc1. Not
  much happened this cycle, unlike the previous kernel release which had
  lots of "excitement" in this part of the kernel. Included in here are
  the following changes:

   - dt binding updates for new platforms

   - 8250 driver updates

   - various small serial driver fixes and updates

   - printk/console naming and matching attempt #2 (was reverted for
     6.10-final, should be good to go this time around, acked by the
     relevant maintainers).

  All of these have been in linux-next for a while with no reported
  issues"

* tag 'tty-6.11-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty: (22 commits)
  Documentation: kernel-parameters: Add DEVNAME:0.0 format for serial ports
  serial: core: Add serial_base_match_and_update_preferred_console()
  printk: Add match_devname_and_update_preferred_console()
  serial: sc16is7xx: hardware reset chip if reset-gpios is defined in DT
  dt-bindings: serial: sc16is7xx: add reset-gpios
  dt-bindings: serial: vt8500-uart: convert to json-schema
  serial: 8250_platform: Explicitly show we initialise ISA ports only once
  tty: add missing MODULE_DESCRIPTION() macros
  dt-bindings: serial: mediatek,uart: add MT7988
  serial: sh-sci: Add support for RZ/V2H(P) SoC
  dt-bindings: serial: Add documentation for Renesas RZ/V2H(P) (R9A09G057) SCIF support
  dt-bindings: serial: renesas,scif: Make 'interrupt-names' property as required
  dt-bindings: serial: renesas,scif: Validate 'interrupts' and 'interrupt-names'
  dt-bindings: serial: renesas,scif: Move ref for serial.yaml at the end
  riscv: dts: starfive: jh7110: Add the core reset and jh7110 compatible for uarts
  serial: 8250_dw: Use reset array API to get resets
  dt-bindings: serial: snps-dw-apb-uart: Add one more reset signal for StarFive JH7110 SoC
  serial: 8250: Extract platform driver
  serial: 8250: Extract RSA bits
  serial: imx: stop casting struct uart_port to struct imx_port
  ...

serial: 8250_omap: Fix Errata i2310 with RX FIFO level check

2024-07-03T14:10:57+00:00

Errata i2310[0] says, Erroneous timeout can be triggered,
if this Erroneous interrupt is not cleared then it may leads
to storm of interrupts.

Commit 9d141c1e6157 ("serial: 8250_omap: Implementation of Errata i2310")
which added the workaround but missed ensuring RX FIFO is really empty
before applying the errata workaround as recommended in the errata text.
Fix this by adding back check for UART_OMAP_RX_LVL to be 0 for
workaround to take effect.

[0] https://www.ti.com/lit/pdf/sprz536 page 23

Fixes: 9d141c1e6157 ("serial: 8250_omap: Implementation of Errata i2310")
Cc: stable@vger.kernel.org
Reported-by: Vignesh Raghavendra 
Closes: https://lore.kernel.org/all/e96d0c55-0b12-4cbf-9d23-48963543de49@ti.com/
Signed-off-by: Udit Kumar 
Link: https://lore.kernel.org/r/20240625160725.2102194-1-u-kumar1@ti.com
Signed-off-by: Greg Kroah-Hartman

Merge 6.10-rc6 into tty-next

2024-07-01T12:16:48+00:00

This resolves the merge issues in the 8250 code due to some reverts in
6.10-rc6 in the console changes.

Signed-off-by: Greg Kroah-Hartman

Revert "serial: 8250: Add preferred console in serial8250_isa_init_ports()"

2024-06-25T05:57:55+00:00

This reverts commit a8b04cfe7dad84e65df5996e14b435fd356fe62c.

Let's roll back all of the serial core and printk console changes that
went into 6.10-rc1 as there still are problems with them that need to be
sorted out.

Link: https://lore.kernel.org/r/ZnpRozsdw6zbjqze@tlindgre-MOBL1
Reported-by: Petr Mladek 
Reported-by: Tony Lindgren 
Cc: Jiri Slaby 
Cc: John Ogness 
Cc: Sergey Senozhatsky 
Cc: Andy Shevchenko 
Cc: Ilpo Järvinen 
Signed-off-by: Greg Kroah-Hartman

serial: 8250_omap: Implementation of Errata i2310

2024-06-24T14:12:41+00:00

As per Errata i2310[0], Erroneous timeout can be triggered,
if this Erroneous interrupt is not cleared then it may leads
to storm of interrupts, therefore apply Errata i2310 solution.

[0] https://www.ti.com/lit/pdf/sprz536 page 23

Fixes: b67e830d38fa ("serial: 8250: 8250_omap: Fix possible interrupt storm on K3 SoCs")
Cc: stable@vger.kernel.org
Signed-off-by: Udit Kumar 
Link: https://lore.kernel.org/r/20240619105903.165434-1-u-kumar1@ti.com
Signed-off-by: Greg Kroah-Hartman

tty: serial: 8250: Fix port count mismatch with the device

2024-06-24T14:12:27+00:00

Normally, the number of ports is indicated by the third digit of the
device ID on Moxa PCI serial boards. For example, `0x1121` indicates a
device with 2 ports.

However, `CP116E_A_A` and `CP116E_A_B` are exceptions; they have 8
ports, but the third digit of the device ID is `6`.

This patch introduces a function to retrieve the number of ports on Moxa
PCI serial boards, addressing the issue described above.

Fixes: 37058fd5d239 ("tty: serial: 8250: Add support for MOXA Mini PCIe boards")
Cc: stable 
Signed-off-by: Crescent Hsieh 
Reviewed-by: Andy Shevchenko 
Link: https://lore.kernel.org/r/20240617063058.18866-1-crescentcy.hsieh@moxa.com
Signed-off-by: Greg Kroah-Hartman

serial: 8250_platform: Explicitly show we initialise ISA ports only once

2024-06-24T14:10:17+00:00

serial8250_isa_init_ports() uses home grown approach to make itself
a singleton. Instead, explicitly show that we initialise ISA ports
once by providing a helper function which calls the original function
via DO_ONCE() macro.

Signed-off-by: Andy Shevchenko 
Link: https://lore.kernel.org/r/20240606184841.3102545-1-andriy.shevchenko@linux.intel.com
Signed-off-by: Greg Kroah-Hartman

tty: add missing MODULE_DESCRIPTION() macros

2024-06-24T14:10:11+00:00

make allmodconfig && make W=1 C=1 reports:
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/tty/serial/8250/8250_base.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/tty/serial/8250/8250_pxa.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/tty/serial/8250/serial_cs.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/tty/serial/esp32_uart.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/tty/serial/esp32_acm.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/tty/serial/owl-uart.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/tty/n_hdlc.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/tty/n_gsm.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/tty/ttynull.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/tty/goldfish.o

Add all missing invocations of the MODULE_DESCRIPTION() macro.

Signed-off-by: Jeff Johnson 
Link: https://lore.kernel.org/r/20240607-md-drivers-tty-v1-1-50a7efb8bed8@quicinc.com
Signed-off-by: Greg Kroah-Hartman

serial: 8250_dw: Use reset array API to get resets

2024-06-24T14:09:10+00:00

Some SoCs like StarFive JH7110 require two or more resets.
So change to use the reset array API to get resets.

Signed-off-by: Hal Feng 
Link: https://lore.kernel.org/r/20240604084729.57239-3-hal.feng@starfivetech.com
Signed-off-by: Greg Kroah-Hartman