Re: [PATCH V1 2/6] soc: qcom: dcc: Add driver support for Data Capture and Compare unit(DCC)
From: Bjorn Andersson <hidden>
Date: 2021-03-11 16:34:54
Also in:
linux-arm-msm, linux-devicetree, lkml
On Thu 11 Mar 04:06 CST 2021, schowdhu@codeaurora.org wrote:
On 2021-03-11 04:49, Bjorn Andersson wrote:quoted
On Wed 10 Mar 10:46 CST 2021, Souradeep Chowdhury wrote:quoted
The DCC is a DMA Engine designed to capture and store data during system crash or software triggers. The DCC operates based on link list entries which provides it with data and addresses and the function it needs to perform. These functions are read, write and loop. Added the basic driver in this patch which contains a probe method which instantiates the resources needed by the driver. DCC has it's own SRAM which needs to be instantiated at probe time as well.So to summarize, the DCC will upon a crash copy the configured region into the dcc-ram, where it can be retrieved either by dumping the memory over USB or from sysfs on the next boot?Replied by Sai
Thanks Souradeep and Sai, I'm definitely interested in learning more about what the hardware block can do and how we can use it. Regards, Bjorn _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel