From: Mukesh Savaliya <mukesh.savaliya@oss.qualcomm.com>
To: Viken Dadhaniya <viken.dadhaniya@oss.qualcomm.com>,
Andi Shyti <andi.shyti@kernel.org>, Rob Herring <robh@kernel.org>,
Krzysztof Kozlowski <krzk+dt@kernel.org>,
Conor Dooley <conor+dt@kernel.org>
Cc: linux-arm-msm@vger.kernel.org, linux-i2c@vger.kernel.org,
devicetree@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH v5 2/2] i2c: qcom-target: Add driver for Qualcomm I2C target controller
Date: Wed, 14 Oct 2026 23:57:36 +0530 [thread overview]
Message-ID: <02a7367f-ea7f-4c20-91c4-03b751562ea0@oss.qualcomm.com> (raw)
In-Reply-To: <20261005-i2c-qcom-slave-v5-2-6254cc7c08d3@oss.qualcomm.com>
On 10/5/2026 10:15 PM, Viken Dadhaniya wrote:
> QDU1000 and related Qualcomm SoCs include a dedicated I2C target
> controller that operates exclusively in target mode. The existing
> Qualcomm I2C controller drivers, GENI and QUP, are master-only and
> cannot serve systems where the SoC must respond as an I2C target on
> the bus.
>
> Register the controller with the Linux I2C slave framework through
> i2c_algorithm.reg_slave and i2c_algorithm.unreg_slave. This allows
> standard slave backends, such as slave-24c02, to be attached at
> runtime through i2c_slave_register().
>
> Handle IRQ events for RX FIFO service, clock stretching during read
> and write phases, STOP and repeated-start conditions, and error
> recovery through a software reset.
>
> Enable the required AHB and XO clocks and vote for interconnect
> bandwidth. Restore the hardware state across system suspend and
> resume using regular system-sleep PM callbacks.
>
> Signed-off-by: Viken Dadhaniya <viken.dadhaniya@oss.qualcomm.com>
> ---
Reviewed-by: Mukesh Kumar Savaliya <mukesh.savaliya@oss.qualcomm.com>
prev parent reply other threads:[~2026-10-14 18:27 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-10-05 16:45 [PATCH v5 0/2] Add Qualcomm I2C target controller driver Viken Dadhaniya
2026-10-05 16:45 ` [PATCH v5 1/2] dt-bindings: i2c: Add Qualcomm I2C target controller Viken Dadhaniya
2026-10-05 16:45 ` [PATCH v5 2/2] i2c: qcom-target: Add driver for " Viken Dadhaniya
2026-10-14 18:27 ` Mukesh Savaliya [this message]
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