[PATCH] mtd: rawnand: Do not check for bad block if bbt is unavailable
manivannan.sadhasivam at linaro.org
Wed Feb 3 06:41:31 EST 2021
On 3 February 2021 4:54:22 PM IST, Boris Brezillon <boris.brezillon at collabora.com> wrote:
>On Wed, 03 Feb 2021 16:22:42 +0530
>Manivannan Sadhasivam <manivannan.sadhasivam at linaro.org> wrote:
>> On 3 February 2021 3:49:14 PM IST, Boris Brezillon
><boris.brezillon at collabora.com> wrote:
>> >On Wed, 03 Feb 2021 15:42:02 +0530
>> >Manivannan Sadhasivam <manivannan.sadhasivam at linaro.org> wrote:
>> >> >>
>> >> >> I got more information from the vendor, Telit. The access to
>> >> >partition is protected by Trustzone and any access in non
>> >> >mode (where Linux kernel runs) causes kernel panic and the device
>> >> >reboots.
>> >Out of curiosity, is it a per-CS-line thing or is this section
>> >protected on all CS?
>> Sorry, I didn't get your question.
>The qcom controller can handle several chips, each connected through a
>different CS (chip-select) line, right? I'm wondering if the firmware
>running in secure mode has the ability to block access for a specific
>CS line or if all CS lines have the same constraint. That will impact
>the way you describe it in your DT (in one case the secure-region
>property should be under the controller node, in the other case it
>should be under the NAND chip node).
Right. I believe the implementation is common to all NAND chips so the property should be in the controller node.
Sent from my Android device with K-9 Mail. Please excuse my brevity.
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