[PATCH v2 0/2] Fix deadlock during RSCI FIFO overrun error

[PATCH v2 0/2] Fix deadlock during RSCI FIFO overrun error

[Biju]

From: Biju Das <biju.das.jz@bp.renesas.com>

This patch series aims to fix 2 issues
 1) Fix deadlock during RSCI FIFO overrun error, as wrong register used to
    clear the status.
 2) Hardware flow control is supported on all SoCs. Fix the binding.

v1->v2:
 * Split the fixes patches from original series [1]
 * Updated commit message to make it clear that hardware flow control
   supported on all SoC for patch#1
 * Added Ack from Conor for patch#1
 * Added fixes tag for patch#1

[1] https://lore.kernel.org/all/20251027154615.115759-1-biju.das.jz@bp.renesas.com/

Biju Das (2):
  dt-bindings: serial: rsci: Drop "uart-has-rtscts: false"
  serial: sh-sci: Fix deadlock during RSCI FIFO overrun error

 .../devicetree/bindings/serial/renesas,rsci.yaml          | 2 --
 drivers/tty/serial/rsci.c                                 | 1 +
 drivers/tty/serial/sh-sci-common.h                        | 1 +
 drivers/tty/serial/sh-sci.c                               | 8 ++++++--
 4 files changed, 8 insertions(+), 4 deletions(-)

-- 
2.43.0

[PATCH v2 1/2] dt-bindings: serial: rsci: Drop "uart-has-rtscts: false"

[Biju]

From: Biju Das <biju.das.jz@bp.renesas.com>

Drop "uart-has-rtscts: false" from binding as the IP supports hardware
flow control on all SoCs.

Cc: stable@kernel.org
Fixes: 25422e8f46c1 ("dt-bindings: serial: Add compatible for Renesas RZ/T2H SoC in sci")
Acked-by: Conor Dooley <conor.dooley@microchip.com>
Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
---
v1->v2:
 * Updated commit message to make it clear that hardware flow control
   supported on all SoC
 * Added Ack from Conor
 * Added fixes tag
---
 Documentation/devicetree/bindings/serial/renesas,rsci.yaml | 2 --
 1 file changed, 2 deletions(-)

diff --git a/Documentation/devicetree/bindings/serial/renesas,rsci.yaml b/Documentation/devicetree/bindings/serial/renesas,rsci.yaml
index f50d8e02f476..6b1f827a335b 100644
--- a/Documentation/devicetree/bindings/serial/renesas,rsci.yaml
+++ b/Documentation/devicetree/bindings/serial/renesas,rsci.yaml
@@ -54,8 +54,6 @@ properties:
   power-domains:
     maxItems: 1
 
-  uart-has-rtscts: false
-
 required:
   - compatible
   - reg
-- 
2.43.0

Re: [PATCH v2 1/2] dt-bindings: serial: rsci: Drop "uart-has-rtscts: false"

[Geert Uytterhoeven]

On Wed, 29 Oct 2025 at 09:21, Biju <biju.das.au@gmail.com> wrote:
> From: Biju Das <biju.das.jz@bp.renesas.com>
>
> Drop "uart-has-rtscts: false" from binding as the IP supports hardware
> flow control on all SoCs.
>
> Cc: stable@kernel.org
> Fixes: 25422e8f46c1 ("dt-bindings: serial: Add compatible for Renesas RZ/T2H SoC in sci")
> Acked-by: Conor Dooley <conor.dooley@microchip.com>
> Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
> ---
> v1->v2:
>  * Updated commit message to make it clear that hardware flow control
>    supported on all SoC
>  * Added Ack from Conor
>  * Added fixes tag

Yeah, this was introduced when renesas,rsci.yaml was split off
incorrectly from renesas,sci.yaml in v7.

Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>

Gr{oetje,eeting}s,

                        Geert


--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds