linux-kernel - Re: [PATCH v7 0/7] clk: meson-axg: Add AO Cloclk and Reset driver

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Message-ID: <1524820841.4026.112.camel@baylibre.com>
Date:   Fri, 27 Apr 2018 11:20:41 +0200
From:   Jerome Brunet <jbrunet@...libre.com>
To:     Yixun Lan <yixun.lan@...ogic.com>,
        Neil Armstrong <narmstrong@...libre.com>,
        Kevin Hilman <khilman@...libre.com>,
        Carlo Caione <carlo@...one.org>
Cc:     Rob Herring <robh@...nel.org>,
        Michael Turquette <mturquette@...libre.com>,
        Stephen Boyd <sboyd@...eaurora.org>,
        Philipp Zabel <p.zabel@...gutronix.de>,
        Qiufang Dai <qiufang.dai@...ogic.com>,
        linux-amlogic@...ts.infradead.org, linux-clk@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        devicetree@...r.kernel.org
Subject: Re: [PATCH v7 0/7] clk: meson-axg: Add AO Cloclk and Reset driver

On Thu, 2018-04-26 at 16:44 +0800, Yixun Lan wrote:
>   This patch try to add AO clock and Reset driver for Amlogic's
> Meson-AXG SoC.
>   Please note that patch 7 need to wait for the DTS changes[3] merged
> into mainline first, otherwise it will break the serial console.
> 
>  patch 2: factor the common code into a dedicated file
>  patch 3-5: add the aoclk driver for AXG SoC
>  patch 6-7: drop unnecessary clock flags
> 
> changes since v6 at [7]: 
>  - fix over 80 chars chechpatch error
>  - add Philip's Ack on patch 5
>  - drop extra end of newline
> 
> changes since v5 at [6]: 
>  - drop unnecessary header files
>  - add 'axg_aoclk' prefix to clk driver, make them more consistent
>  - add missing end new line..
> 
> changes since v4 at [5]: 
>  - fix return err
>  - introduce CONFIG_COMMON_CLK_MESON_AO
>  - format/style minor fix
> 
> changes since v3 at [4]: 
>  - add 'const' contraint to the read-only data
>  - switch to devm_of_clk_add_hw_provider API
>  - check return value of devm_reset_controller_register
> 
> changes since v2 at [2]: 
>  - rework meson_aoclkc_probe() which leverage the of_match_data
>  - merge patch 5-6 into this series
>  - seperate DTS patch, will send to Kevin Hilman independently
>  
> changes since v1 at [0]: 
>  - rebase to clk-meson's branch 'next/drivers' [1]
>  - fix license, update to BSD-3-Clause
>  - drop un-used include header file
> 
> [0] https://lkml.kernel.org/r/20180209070026.193879-1-yixun.lan@amlogic.com
> [1] git://github.com/BayLibre/clk-meson.git branch: next-drivers
> [2] https://lkml.kernel.org/r/20180323143816.200573-1-yixun.lan@amlogic.com
> [3] https://lkml.kernel.org/r/20180326081809.49493-4-yixun.lan@amlogic.com
> [4] https://lkml.kernel.org/r/20180328025050.221585-1-yixun.lan@amlogic.com
> [5] https://lkml.kernel.org/r/20180408031938.153474-1-yixun.lan@amlogic.com
> [6] https://lkml.kernel.org/r/20180409143749.71197-1-yixun.lan@amlogic.com
> [7] https://lkml.kernel.org/r/20180419135426.155794-1-yixun.lan@amlogic.com

Yixun,

Your series looks mostly Ok to me, apart from the problem reported by Philipp.

However, once applied, if the clkc ao controller is enabled, both gxl and axg
fail to complete the boot. Could you please explain how this was tested ??

Not merging it until we get to the bottom of this.

> 
> 
> Qiufang Dai (1):
>   clk: meson-axg: Add AO Clock and Reset controller driver
> 
> Yixun Lan (6):
>   clk: meson: migrate to devm_of_clk_add_hw_provider API
>   clk: meson: aoclk: refactor common code into dedicated file
>   dt-bindings: clock: axg-aoclkc: New binding for Meson-AXG SoC
>   dt-bindings: clock: reset: Add AXG AO Clock and Reset Bindings
>   clk: meson: drop CLK_SET_RATE_PARENT flag
>   clk: meson: drop CLK_IGNORE_UNUSED flag
> 
>  .../bindings/clock/amlogic,gxbb-aoclkc.txt    |   1 +
>  drivers/clk/meson/Kconfig                     |   8 +
>  drivers/clk/meson/Makefile                    |   3 +-
>  drivers/clk/meson/axg-aoclk.c                 | 163 ++++++++++++++++++
>  drivers/clk/meson/axg-aoclk.h                 |  29 ++++
>  drivers/clk/meson/gxbb-aoclk.c                |  95 ++++------
>  drivers/clk/meson/gxbb-aoclk.h                |   5 +
>  drivers/clk/meson/meson-aoclk.c               |  81 +++++++++
>  drivers/clk/meson/meson-aoclk.h               |  34 ++++
>  include/dt-bindings/clock/axg-aoclkc.h        |  26 +++
>  include/dt-bindings/reset/axg-aoclkc.h        |  20 +++
>  11 files changed, 401 insertions(+), 64 deletions(-)
>  create mode 100644 drivers/clk/meson/axg-aoclk.c
>  create mode 100644 drivers/clk/meson/axg-aoclk.h
>  create mode 100644 drivers/clk/meson/meson-aoclk.c
>  create mode 100644 drivers/clk/meson/meson-aoclk.h
>  create mode 100644 include/dt-bindings/clock/axg-aoclkc.h
>  create mode 100644 include/dt-bindings/reset/axg-aoclkc.h
>