linux-kernel - [PATCH v2 0/3] reset: npcm: add NPCM reset driver support

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Message-Id: <20191028155403.134126-1-tmaimon77@gmail.com>
Date:   Mon, 28 Oct 2019 17:54:00 +0200
From:   Tomer Maimon <tmaimon77@...il.com>
To:     p.zabel@...gutronix.de, robh+dt@...nel.org, mark.rutland@....com,
        yuenn@...gle.com, venture@...gle.com, benjaminfair@...gle.com,
        avifishman70@...il.com, joel@....id.au
Cc:     openbmc@...ts.ozlabs.org, linux-kernel@...r.kernel.org,
        devicetree@...r.kernel.org, Tomer Maimon <tmaimon77@...il.com>
Subject: [PATCH v2 0/3] reset: npcm: add NPCM reset driver support

This patch set adds reset controller support 
for the Nuvoton NPCM Baseboard Management Controller (BMC).

Apart of controlling all NPCM BMC reset module lines the NPCM reset driver
support NPCM BMC software reset to restarting the NPCM BMC.

Supporting NPCM USB-PHY reset as follow:

NPCM BMC USB-PHY connected to two modules USB device (UDC) and USB host.

If we will restart the USB-PHY at the UDC probe and later the 
USB host probe will restart USB-PHY again it will disable the UDC
and vice versa.

The solution is to reset the USB-PHY at the reset probe stage before 
the UDC and the USB host are initializing.

NPCM reset driver tested on NPCM750 evaluation board.

Addressed comments from:.
 - kbuild test robot : https://lkml.org/lkml/2019/10/27/768 

Changes since version 1:
 - Check if gcr_regmap parameter initialized before using it.

Tomer Maimon (3):
  dt-binding: reset: add NPCM reset controller documentation
  dt-bindings: reset: Add binding constants for NPCM7xx reset controller
  reset: npcm: add NPCM reset controller driver

 .../bindings/reset/nuvoton,npcm-reset.txt     |  35 +++
 drivers/reset/Kconfig                         |   7 +
 drivers/reset/Makefile                        |   1 +
 drivers/reset/reset-npcm.c                    | 275 ++++++++++++++++++
 .../dt-bindings/reset/nuvoton,npcm7xx-reset.h |  82 ++++++
 5 files changed, 400 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/reset/nuvoton,npcm-reset.txt
 create mode 100644 drivers/reset/reset-npcm.c
 create mode 100644 include/dt-bindings/reset/nuvoton,npcm7xx-reset.h

-- 
2.22.0