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All of which can be >>> found in the Technical Reference Manual (TRM) located here: >>> >>> https://www.ti.com/lit/ug/sprujb4/sprujb4.pdf >>> >>> Signed-off-by: Vignesh Raghavendra >>> Signed-off-by: Bryan Brattlof >>> --- >>> Documentation/devicetree/bindings/arm/ti/k3.yaml | 6 ++ >>> arch/arm64/boot/dts/ti/Makefile | 3 + >>> arch/arm64/boot/dts/ti/k3-am62l-main.dtsi | 52 ++++++++++++++ >>> arch/arm64/boot/dts/ti/k3-am62l-wakeup.dtsi | 33 +++++++++ >>> arch/arm64/boot/dts/ti/k3-am62l.dtsi | 89 ++++++++++++++++++++++++ >>> arch/arm64/boot/dts/ti/k3-am62l3.dtsi | 67 ++++++++++++++++++ >>> arch/arm64/boot/dts/ti/k3-pinctrl.h | 2 + >>> 7 files changed, 252 insertions(+) >>> >>> diff --git a/Documentation/devicetree/bindings/arm/ti/k3.yaml b/Documentation/devicetree/bindings/arm/ti/k3.yaml >>> index 18f155cd06c84..b109e854879cb 100644 >>> --- a/Documentation/devicetree/bindings/arm/ti/k3.yaml >>> +++ b/Documentation/devicetree/bindings/arm/ti/k3.yaml >>> @@ -31,6 +31,12 @@ properties: >>> - const: phytec,am62a-phycore-som >>> - const: ti,am62a7 >>> >>> + - description: K3 AM62L3 SoC and Boards >>> + items: >>> + - enum: >>> + - ti,am62l3-evm >>> + - const: ti,am62l3 >>> + >> >> can you clarify the differences between AM62L and AM62L3? you have a mix of names in this series. I assume that >> AM62L is the SOC family / product name, while AM62L3 is a specific >> part number. >> > > Absolutely! I found the naming a bit confusing myself. > > We (the baseport teams) have kinda coalesced into using less digits as a > way to describe all devices included in the subgroup. So for example AM6 > would be all Sitara class MPUs in the K3 generation. AM62L would be all > parts in K3 in the 'lite' derivative. AM62L32 would be all AM62L parts > with display and dual cores. > > But I should probably decode everything as these part numbers are really > opaque in my eye if you don't see them every day. > > The full orderable part number for this part is the XAM62L32AOGHAANB > > 'X' is the production status. If you see an 'X' here it just means > it's a pre-production sample that hasn't gone through validation. > Most of the time (outside of TI) this will be blank > > 'AM' is the prefix which indicates a Sitara class of SoC. The AM68 > and AM69 being originally a Jacinto class part kinda makes this more > confusing but back in the day i think it used to stand for ARM > Microprocessors so that's what I've been telling people. > > '62' is the generation and family of the part. So this example the 6 > indicates the K3 generation of SoCs and the 2 means it's an MPU > family with 2k display or 2k camera support among other things. > > 'L' is the derivative of the family. This is mostly a marketing > thing to indicate the target market for the SoC: > > AM62 (or blank) would be the general base class > AM62A is for the analytics derivative > AM62D is for DSP > AM62P is for Plus > AM62L is for Lite > > '3' is the configuration. This really depends on what the business > teams find feasible. Some of the family/derivative combinations > don't make sense to have. For example an AM62L9 which would just be > the base AM62 derivative, so some configurations may not exist. > > 0 = No Display / No ISP > 1 = No Display with ISP > 2 = No Display with ISP and Analytics > 3 = Display / No ISP > 4 = Display / No ISP with Analytics > 5 = Display / No ISP with GPU > 6 = Display with ISP > 7 = Display with ISP and Analytics > 8 = Display with ISP and GPU > 9 = includes everything > > '2' is the core count. AM62L32 would be the dual core option. > > The rest of the digits get into stuff we try to do automatically via our > bootloaders so you wont see any mention of them in Linux, but I kinda > wanted to continue decoding this :) > > 'A' is the silicon revision. A = SR 1.0 > > 'O' is the speed grade. (there is a table somewhere with all the > speed grades we support. The two I know about are. > > O = 1.25GHz > E = 833MHz > > 'G' is the feature set. Because the derivative is 'L' (or lite) we > probably won't have options other than G which is the baseline > > 'H' is the security & functional safety value > > 'G' is non secure no functional safety. (like the beagleplay) > '1-9' are dummy key devices with no functional safety > 'H-R' are production key HS devices with no function safety > 'S-Z' are production key HS devices with function safety > > 'H-Z' is probably the most common security you will see TI make now. > There are ways (by talking to sales) you can purchase other variants for > special use cases (like aviation) but I think these are all special use > cases with unique regulatory or security issues. > > 'A' is the temperature rating > > 'A' = -40C to 105C > 'I' = -40C to 125C > > 'ANB' is the package: 11.9mm x 11.9mm with 0.5 BGA > > There can be a total of 18 digits which can vary when decoding the > family (AM65, AM64) but generally this decoding scheme will hold. I only > really see those weird parts with our vertically integrated customers > with their own sales teams. > > Sorry for the essay. I went though our catalog one day and had the very > same question you did so I wanted to dump as much as I could. Thank you for this write up! Will save this mail for future reference. > > ~Bryan >