linux-kernel - [PATCH v3 0/2] i2c: pxa: fix I2C communication on Armada 3700

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Message-Id: <20250827-i2c-pxa-fix-i2c-communication-v3-0-052c9b1966a2@gmail.com>
Date: Wed, 27 Aug 2025 19:13:57 +0200
From: Gabor Juhos <j4g8y7@...il.com>
To: Wolfram Sang <wsa@...nel.org>, 
 Wolfram Sang <wsa+renesas@...g-engineering.com>, 
 Andi Shyti <andi.shyti@...nel.org>, 
 Andy Shevchenko <andriy.shevchenko@...ux.intel.com>, 
 Russell King <rmk+kernel@...linux.org.uk>, Andrew Lunn <andrew@...n.ch>, 
 Hanna Hawa <hhhawa@...zon.com>
Cc: Robert Marko <robert.marko@...tura.hr>, 
 Linus Walleij <linus.walleij@...aro.org>, 
 Russell King <rmk+kernel@...linux.org.uk>, linux-i2c@...r.kernel.org, 
 linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org, 
 Gabor Juhos <j4g8y7@...il.com>, stable@...r.kernel.org, 
 Imre Kaloz <kaloz@...nwrt.org>
Subject: [PATCH v3 0/2] i2c: pxa: fix I2C communication on Armada 3700

There is a long standing bug which causes I2C communication not to
work on the Armada 3700 based boards. The first patch in the series
fixes that regression. The second patch improves recovery to make it
more robust which helps to avoid communication problems with certain
SFP modules.

Signed-off-by: Gabor Juhos <j4g8y7@...il.com>
---
Changes in v3:
  - rebase on tip of i2c/for-current
  - remove Imre's tag from the cover letter, and replace his SoB tag to
    Reviewed-by in the individual patches
  - rework the second patch so it does not need changes in the I2C core code,
    and drop the first one as it is not needed now
  - Link to v2: https://lore.kernel.org/r/20250811-i2c-pxa-fix-i2c-communication-v2-0-ca42ea818dc9@gmail.com

Changes in v2:
  - collect offered tags
  - rebase and retest on tip of i2c/for-current
  - Link to v1: https://lore.kernel.org/r/20250511-i2c-pxa-fix-i2c-communication-v1-0-e9097d09a015@gmail.com

---
Gabor Juhos (2):
      i2c: pxa: defer reset on Armada 3700 when recovery is used
      i2c: pxa: handle 'Early Bus Busy' condition on Armada 3700

 drivers/i2c/busses/i2c-pxa.c | 35 ++++++++++++++++++++++++++++-------
 1 file changed, 28 insertions(+), 7 deletions(-)
---
base-commit: 3dd22078026c7cad4d4a3f32c5dc5452c7180de8
change-id: 20250510-i2c-pxa-fix-i2c-communication-3e6de1e3d0c6

Best regards,
-- 
Gabor Juhos <j4g8y7@...il.com>