linux-kernel - [PATCH v2 0/6] gpio: update i.MX93/8ULP and support i.MX95

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Date:   Sat, 16 Sep 2023 10:03:56 +0800
From:   "Peng Fan (OSS)" <peng.fan@....nxp.com>
To:     Linus Walleij <linus.walleij@...aro.org>,
        Bartosz Golaszewski <brgl@...ev.pl>,
        Andy Shevchenko <andy@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Stefan Agner <stefan@...er.ch>,
        Shawn Guo <shawnguo@...nel.org>,
        Sascha Hauer <s.hauer@...gutronix.de>,
        Pengutronix Kernel Team <kernel@...gutronix.de>,
        Fabio Estevam <festevam@...il.com>,
        NXP Linux Team <linux-imx@....com>
Cc:     linux-gpio@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        Peng Fan <peng.fan@....com>
Subject: [PATCH v2 0/6] gpio: update i.MX93/8ULP and support i.MX95

>From hardware perspective:
- i.MX8ULP/93 GPIO supports two interrupts, 1st for Trustzone non-secure irq,
  2nd for Trustzone secure irq.
- i.MX8ULP/93 only has one register base

The current linux gpio-vf610.c could work with i.MX8ULP/i.MX93, it is
because some trick did in device tree node with offset added to base:
  reg = <0x2d010080 0x1000>, <0x2d010040 0x40>;
But actually the register base should be 0x2d010000.

So i.MX8ULP/93 is not HW compatible with i.MX7ULP.

i.MX93 GPIO is directly derived from i.MX8ULP, so make i.MX93 compatible
with i.MX8ULP. i.MX95 GPIO is same as i.MX93, so also compatible with
i.MX8ULP

There maybe dtbs_check failure if only test the 1st patch. After
the patchset applied, no failure.

To make avoid break old bindings from work, update the driver
to support both old/new bindings.

---
Changes in v2:
- Update bindings with describe items, add one reg base for i.MX8ULP/93
- Update driver to support one reg base, support both new/old bindings
- Add a new patch 1 to update gpio-ranges found in dtbs_check
- Link to v1: https://lore.kernel.org/r/20230914-vf610-gpio-v1-0-3ed418182a6a@nxp.com

---
Peng Fan (6):
      dt-bindings: gpio: vf610: update gpio-ranges
      dt-bindings: gpio: vf610: correct i.MX8ULP and i.MX93
      dt-bindings: gpio: vf610: add i.MX95 compatible
      gpio: vf610: add i.MX8ULP of_device_id entry
      arm64: dts: imx8ulp: update gpio node
      arm64: dts: imx93: update gpio node

 .../devicetree/bindings/gpio/gpio-vf610.yaml       | 45 ++++++++++++++++--
 arch/arm64/boot/dts/freescale/imx8ulp.dtsi         | 21 +++++----
 arch/arm64/boot/dts/freescale/imx93.dtsi           | 28 ++++++-----
 drivers/gpio/gpio-vf610.c                          | 55 +++++++++++++++++++---
 4 files changed, 117 insertions(+), 32 deletions(-)
---
base-commit: e143016b56ecb0fcda5bb6026b0a25fe55274f56
change-id: 20230914-vf610-gpio-46edacd2b513

Best regards,
-- 
Peng Fan <peng.fan@....com>