linux-kernel - [PATCH v3 0/2] Add i2c clock duty cycle property for setting minimum persentage of clock high

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Message-Id: <20220607163703.26355-1-potin.lai.pt@gmail.com>
Date:   Wed,  8 Jun 2022 00:37:01 +0800
From:   Potin Lai <potin.lai.pt@...il.com>
To:     Brendan Higgins <brendanhiggins@...gle.com>,
        Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Joel Stanley <joel@....id.au>,
        Andrew Jeffery <andrew@...id.au>,
        Rob Herring <robh+dt@...nel.org>,
        Rayn Chen <rayn_chen@...eedtech.com>
Cc:     Patrick Williams <patrick@...cx.xyz>,
        Potin Lai <potin.lai@...ntatw.com>, linux-i2c@...r.kernel.org,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-aspeed@...ts.ozlabs.org, linux-kernel@...r.kernel.org,
        Potin Lai <potin.lai.pt@...il.com>
Subject: [PATCH v3 0/2] Add i2c clock duty cycle property for setting minimum persentage of clock high

Introducing i2c-clk-duty-cycle-min property for setting minimum persentage
of clock high. 

This driver will go through base clock divisor and calculate a set of
high/low clock with duty cycle applied. if driver could not find a suit
high/low clock set, then it will use default duty cycle (50%) recalculate.

LINK: [v1] https://lore.kernel.org/all/20220530114056.8722-1-potin.lai.pt@gmail.com/
LINK: [v2] https://lore.kernel.org/all/20220601041512.21484-1-potin.lai.pt@gmail.com/

changes v2 --> v3:
* discard the properties for manual setting, use duty cycle to calculate
  high/low clock.

changes v1 --> v2:
* update bt-bindings documentation
* use meaningful values for properties instead of acture value in register

Potin Lai (2):
  aspeed: i2c: add clock duty cycle property
  dt-bindings: aspeed-i2c: add properties for setting i2c clock duty
    cycle

 .../devicetree/bindings/i2c/aspeed,i2c.yaml   |  8 +++
 drivers/i2c/busses/i2c-aspeed.c               | 56 +++++++++++++++----
 2 files changed, 53 insertions(+), 11 deletions(-)

-- 
2.17.1