linux-kernel - [PATCH v2 RESEND 0/2] i2c: aspeed: Late ack Tx done irqs and fix unhandled Tx done with NAK

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Message-Id: <20231128075236.2724038-1-quan@os.amperecomputing.com>
Date:   Tue, 28 Nov 2023 14:52:34 +0700
From:   Quan Nguyen <quan@...amperecomputing.com>
To:     Brendan Higgins <brendan.higgins@...ux.dev>,
        Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Joel Stanley <joel@....id.au>,
        Andi Shyti <andi.shyti@...nel.org>,
        Andrew Jeffery <andrew@...econstruct.com.au>,
        Wolfram Sang <wsa@...nel.org>,
        Jae Hyun Yoo <jae.hyun.yoo@...ux.intel.com>,
        Guenter Roeck <linux@...ck-us.net>, linux-i2c@...r.kernel.org,
        openbmc@...ts.ozlabs.org, linux-arm-kernel@...ts.infradead.org,
        linux-aspeed@...ts.ozlabs.org, linux-kernel@...r.kernel.org
Cc:     Cosmo Chou <chou.cosmo@...il.com>,
        Open Source Submission <patches@...erecomputing.com>,
        Phong Vo <phong@...amperecomputing.com>,
        "Thang Q . Nguyen" <thang@...amperecomputing.com>
Subject: [PATCH v2 RESEND 0/2] i2c: aspeed: Late ack Tx done irqs and fix unhandled Tx done with NAK

Rebase on the v6.7-rc3 and resend the series as per discussion at
https://lore.kernel.org/all/d0773df55a6fe8a5c9b1a3d7c8dd2e1343643272.camel@codeconstruct.com.au/

The prior discussion could be found at
https://lore.kernel.org/all/20210616031046.2317-1-quan@os.amperecomputing.com/

This series consists of two patches to fix the below issues observed
when testing with slave mode:
  + Unhandled Tx done with NAK
  + Early ack'ed of Tx done (ACK and NAK) causing "Unexpected Ack on
  read request".

v2:
  + Split these patches to separate series [Joel]
  + Added the Fixes lines [Joel]
  + Fixed multiline comment [Joel]
  + Refactor irq clearing code [Joel, Guenter]
  + Revised commit message [Joel, Quan]

v1:
  + These patches are first introduced from this disscusstion
https://lore.kernel.org/all/20210519074934.20712-1-quan@os.amperecomputing.com/

Quan Nguyen (2):
  i2c: aspeed: Fix unhandled Tx done with NAK
  i2c: aspeed: Acknowledge Tx done with and without ACK irq late

 drivers/i2c/busses/i2c-aspeed.c | 22 ++++++++++++++--------
 1 file changed, 14 insertions(+), 8 deletions(-)

-- 
2.35.1