linux-kernel - Re: [PATCH v4 2/2] i2c: tegra: Share same DMA channel for RX and TX

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Message-ID: <ZC1o_sIuQIfHg9pi@orome>
Date:   Wed, 5 Apr 2023 14:26:38 +0200
From:   Thierry Reding <thierry.reding@...il.com>
To:     Akhil R <akhilrajeev@...dia.com>
Cc:     christian.koenig@....com, digetx@...il.com, jonathanh@...dia.com,
        ldewangan@...dia.com, linux-i2c@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-tegra@...r.kernel.org,
        sumit.semwal@...aro.org, wsa@...nel.org
Subject: Re: [PATCH v4 2/2] i2c: tegra: Share same DMA channel for RX and TX

On Fri, Mar 24, 2023 at 05:29:24PM +0530, Akhil R wrote:
> Allocate only one DMA channel for I2C and share it for both TX and RX
> instead of using two different DMA hardware channels with the same
> slave ID. Since I2C supports only half duplex, there is no impact on
> perf with this.
> 
> Signed-off-by: Akhil R <akhilrajeev@...dia.com>
> ---
>  drivers/i2c/busses/i2c-tegra.c | 69 ++++++++++------------------------
>  1 file changed, 20 insertions(+), 49 deletions(-)

Looks good:

Acked-by: Thierry Reding <treding@...dia.com>

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