linux-kernel - RE: [PATCH V2 0/7] i2c-imx-lpi2c: add IPG clock

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Date:   Mon, 22 Aug 2022 08:46:31 +0000
From:   Peng Fan <peng.fan@....com>
To:     "Peng Fan (OSS)" <peng.fan@....nxp.com>,
        Aisheng Dong <aisheng.dong@....com>,
        "robh+dt@...nel.org" <robh+dt@...nel.org>,
        "krzysztof.kozlowski+dt@...aro.org" 
        <krzysztof.kozlowski+dt@...aro.org>,
        "shawnguo@...nel.org" <shawnguo@...nel.org>,
        "s.hauer@...gutronix.de" <s.hauer@...gutronix.de>,
        "wsa@...nel.org" <wsa@...nel.org>
CC:     "kernel@...gutronix.de" <kernel@...gutronix.de>,
        "festevam@...il.com" <festevam@...il.com>,
        dl-linux-imx <linux-imx@....com>,
        "linux-i2c@...r.kernel.org" <linux-i2c@...r.kernel.org>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Clark Wang <xiaoning.wang@....com>
Subject: RE: [PATCH V2 0/7] i2c-imx-lpi2c: add IPG clock

> Subject: [PATCH V2 0/7] i2c-imx-lpi2c: add IPG clock

+ Wolfram Sang I2C maintainer.

Krzysztof,

Do you have time to give a look whether this patchset is ok for you?
Please forgive if this is too early ping. Some i.MX93 dts update pending

Thanks,
Peng.

> 
> From: Peng Fan <peng.fan@....com>
> 
> V2:
>  use clk bulk API in driver to support backward compatibility.
>  Include a new patch, patch 1.
> 
> The i.MX LPI2C needs PER and IPG clock, not just PER or IPG clock.
> The current driver/dts/bindings use one CLK. Although it works with with
> upstream kernel, but it not match the hardware design. If IPG clock is
> disabled, the LPI2C will not work.
> 
> There are changes made to ARM32 i.MX7ULP dts, ARM64 i.MX8 dts, dt-
> bindings, and the lpi2c driver.
> 
> The driver is updated to use bulk clk API to avoid break backward
> compatibility. But it is hard to avoid dtbs_check pass, because the dts and
> binding update are in separate patches.
> 
> Peng Fan (7):
>   ARM: dts: imx7ulp: update the LPI2C clock-names
>   dt-bindings: i2c: i2c-imx-lpi2c: add ipg clk
>   dt-bindings: i2c: i2c-imx-lpi2c: add dmas property
>   dt-bindings: i2c: i2c-imx-lpi2c: add i.MX93
>   arm64: dts: imx8-ss-dma: add IPG clock for i2c
>   ARM: dts: imx7ulp: Add IPG clock for lpi2c
>   i2c: imx-lpi2c: use bulk clk API
> 
>  .../bindings/i2c/i2c-imx-lpi2c.yaml           | 20 +++++++++++++---
>  arch/arm/boot/dts/imx7ulp.dtsi                | 10 ++++----
>  .../arm64/boot/dts/freescale/imx8-ss-dma.dtsi | 20 +++++++++-------
>  drivers/i2c/busses/i2c-imx-lpi2c.c            | 24 +++++++++----------
>  4 files changed, 47 insertions(+), 27 deletions(-)
> 
> --
> 2.37.1