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([2600:8803:e7e4:1d00:928b:5d5c:6cd9:1a4]) by smtp.gmail.com with ESMTPSA id 006d021491bc7-60c14c42c16sm30504eaf.7.2025.05.29.08.26.45 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 29 May 2025 08:26:45 -0700 (PDT) Message-ID: Date: Thu, 29 May 2025 10:26:44 -0500 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH 0/2] TCB: Add DMA support to read the capture register AB To: Dharma Balasubiramani , Kamel Bouhara , William Breathitt Gray , Nicolas Ferre , Alexandre Belloni , Claudiu Beznea Cc: linux-arm-kernel@lists.infradead.org, linux-iio@vger.kernel.org, linux-kernel@vger.kernel.org References: <20250528-mchp-tcb-dma-v1-0-083a41fb7b51@microchip.com> Content-Language: en-US From: David Lechner In-Reply-To: <20250528-mchp-tcb-dma-v1-0-083a41fb7b51@microchip.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Please include the counter: prefix in the subject of the cover letter as well. It makes it easier to see at a glance what this series might be about. On 5/28/25 1:13 AM, Dharma Balasubiramani wrote: > This patch series adds support to enable the DMA support for TCB. > > When DMA is used, the Register AB (TC_RAB) address must be configured as > source address of the transfer. TC_RAB provides the next unread value from > TC_RA and TC_RB. It may be read by the DMA after a request has been > triggered upon loading TC_RA or TC_RB. Can you please explain what problem this series is solving and why we need this change?