linux-kernel - [PATCH v3] Create i2c_writesl

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Message-ID: <1610478161-4877-1-git-send-email-skomatineni@nvidia.com>
Date:   Tue, 12 Jan 2021 11:02:40 -0800
From:   Sowjanya Komatineni <skomatineni@...dia.com>
To:     <thierry.reding@...il.com>, <jonathanh@...dia.com>,
        <digetx@...il.com>, <wsa@...-dreams.de>, <skomatineni@...dia.com>
CC:     <linux-tegra@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <linux-i2c@...r.kernel.org>
Subject: [PATCH v3] Create i2c_writesl_vi() to use with VI I2C

Patch in this series is to fix known hardware bug with VI I2C
controller where immediate multiple writes to TX_FIFO gets stuck
resulting in VI I2C controller to be in bad state.

Delta between patch versions:
[v3]:	Includes v2 feedback 
	- uses relaxed writel and readl
	- avoids type casting on data buffer during i2c_writesl_vi()
	- updated comment to clearly mention this as workaround to
	  known hardware bug with VI I2C.

[v2]:	Creates i2c_writesl_vi() for vi i2c based on v1 feedback.

[v1]:	Updates i2c_writesl() to use writel() followed by i2c_readl().

Sowjanya Komatineni (1):
  i2c: tegra: Create i2c_writesl_vi() to use with VI I2C for filling TX
    FIFO

 drivers/i2c/busses/i2c-tegra.c | 22 +++++++++++++++++++++-
 1 file changed, 21 insertions(+), 1 deletion(-)

-- 
2.7.4