linux-kernel - [PATCH v4 0/4] Add support for the rest of Renesas RZ/G3S serial interfaces

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Message-ID: <20250120130936.1080069-1-claudiu.beznea.uj@bp.renesas.com>
Date: Mon, 20 Jan 2025 15:09:32 +0200
From: Claudiu <claudiu.beznea@...on.dev>
To: geert+renesas@...der.be,
	magnus.damm@...il.com,
	robh@...nel.org,
	krzk+dt@...nel.org,
	conor+dt@...nel.org,
	gregkh@...uxfoundation.org,
	jirislaby@...nel.org,
	p.zabel@...gutronix.de,
	claudiu.beznea.uj@...renesas.com,
	wsa+renesas@...g-engineering.com,
	prabhakar.mahadev-lad.rj@...renesas.com
Cc: claudiu.beznea@...on.dev,
	linux-renesas-soc@...r.kernel.org,
	devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	linux-serial@...r.kernel.org
Subject: [PATCH v4 0/4] Add support for the rest of Renesas RZ/G3S serial interfaces

From: Claudiu Beznea <claudiu.beznea.uj@...renesas.com>

Hi,

The Renesas RZ/G3S SoC has 6 serial interfaces. One of them is used
as debug console (and it is already enabled in the current code base).
Series adds support for the remaining ones.

Patches:
-    01/04 - extends suspend to RAM support on the serial driver for
             the RZ/G3S SoC
- 02-04/04 - add device tree support

Merge strategy, if any:
- patch 01/04 can go through the serial tree
- patches 02-04/04 can go through the Renesas tree

Thank you,
Claudiu Beznea

Changes in v4:
- dropped fixes and clock patches as they were applied independently
- dropped DT patches that were already applied
- addressed review comments

Changes in v3:
- in patch "serial: sh-sci: Check if TX data was written to device in
  .tx_empty()":
-- check the status of the DMA transaction in tx_empty()
-- changed the variable name that tracks if TX occurred

Changes in v2:
- drop patch "serial: sh-sci: Clean sci_ports[0] after at earlycon exit"
  from v1 as it was already applied
- used bool instead of atomic_t in patch
  "serial: sh-sci: Check if TX data was written to device in .tx_empty()"


Claudiu Beznea (4):
  serial: sh-sci: Update the suspend/resume support
  arm64: dts: renesas: rzg3s-smarc-switches: Add a header to describe
    different switches
  arm64: dts: renesas: rzg3s-smarc: Enable SCIF3
  arm64: dts: renesas: r9a08g045s33-smarc-pmod: Add overlay for SCIF1

 arch/arm64/boot/dts/renesas/Makefile          |  3 ++
 .../r9a08g045s33-smarc-pmod1-type-3a.dtso     | 48 +++++++++++++++++
 .../boot/dts/renesas/rzg3s-smarc-som.dtsi     | 20 +------
 .../boot/dts/renesas/rzg3s-smarc-switches.h   | 40 ++++++++++++++
 arch/arm64/boot/dts/renesas/rzg3s-smarc.dtsi  | 13 +++++
 drivers/tty/serial/sh-sci.c                   | 53 +++++++++++++++----
 6 files changed, 149 insertions(+), 28 deletions(-)
 create mode 100644 arch/arm64/boot/dts/renesas/r9a08g045s33-smarc-pmod1-type-3a.dtso
 create mode 100644 arch/arm64/boot/dts/renesas/rzg3s-smarc-switches.h

-- 
2.43.0