linux-kernel - [PATCH v6 0/3] i2c: tegra: Improve reset and DMA operations

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Message-ID: <20250710131206.2316-1-akhilrajeev@nvidia.com>
Date: Thu, 10 Jul 2025 18:42:03 +0530
From: Akhil R <akhilrajeev@...dia.com>
To: <andriy.shevchenko@...ux.intel.com>, <andi.shyti@...nel.org>,
	<digetx@...il.com>, <jonathanh@...dia.com>, <ldewangan@...dia.com>,
	<linux-i2c@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
	<linux-tegra@...r.kernel.org>, <p.zabel@...gutronix.de>,
	<thierry.reding@...il.com>
CC: <akhilrajeev@...dia.com>, <conor+dt@...nel.org>,
	<devicetree@...r.kernel.org>, <krzk+dt@...nel.org>, <robh@...nel.org>
Subject: [PATCH v6 0/3] i2c: tegra: Improve reset and DMA operations

This patch series contains the following changes:

1. Fix ACPI reset error handling by using device_reset() instead of
   acpi_evaluate_object() directly, which properly handles ACPI error codes.

2. Add support for internal software reset as a fallback when external
   reset control is not available, particularly useful for platforms that
   restrict reset control from Linux or don't implement ACPI _RST method.

3. Remove unnecessary dma_sync_*() calls on dma_alloc_coherent() buffers,
   which were redundant and could cause issues.

v5->v6:
- Use device_reset() instead of acpi_evaluate_object() directly
- Added a brief description for internal reset.
- Added a cover letter.

v5: https://lore.kernel.org/linux-tegra/20250704064704.23003-1-akhilrajeev@nvidia.com/T/#m21ab8542cf92d6daafb6db9dc90b03eb63de8bbc

Akhil R (3):
  i2c: tegra: Fix reset error handling with ACPI
  i2c: tegra: Use internal reset when reset property is not available
  i2c: tegra: Remove dma_sync_*() calls

 drivers/i2c/busses/i2c-tegra.c | 77 ++++++++++++++++------------------
 1 file changed, 36 insertions(+), 41 deletions(-)

-- 
2.50.1