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arm64: dts: ti: k3-am62a7-sk: Enable full 4GB DDR

PATCH Superseded Devarsh Thakkar 2 participants 2 messages Feb 6, 2023 – Feb 9, 2023

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Device tree bindings Arm/Texas Instruments K3 architecture

v1 of 3 Superseded Latest is v3 →

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Devarsh Thakkar

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PATCH 1/1 arm64: dts: ti: k3-am62a7-sk: Enable full 4GB DDR

AM62A7-SK board has 4GB LPDDR4 Micron MT53E2G32D4DE-046 AUT:B memory but only 2GB was enabled early.

Enable full 4GB memory by updating the latter 2GB memory region which gets mapped to 0x0880000000 i.e. DDR16SS0_SDRAM as referred in Table 2-1. AM62A Common SoC Memory of AM62Ax TRM.

TRM : https://www.ti.com/lit/zip/spruj16

Logs:

Link https://gist.github.com/devarsht/e85b6af89c01ddadb3a62f3e5f196af8
Signed-off-by Devarsh Thakkar <[email protected]>
---
 arch/arm64/boot/dts/ti/k3-am62a7-sk.dts | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)
arch/arm64/boot/dts/ti/k3-am62a7-sk.dts +3 -2
index 5c9012141ee2..f6a67f072dca 100644
@@ -27,8 +27,9 @@
 
 	memory@80000000 {
 		device_type = "memory";
-		/* 2G RAM */
-		reg = <0x00000000 0x80000000 0x00000000 0x80000000>;
+		/* 4G RAM */
+		reg = <0x00000000 0x80000000 0x00000000 0x80000000>,
+		      <0x00000008 0x80000000 0x00000000 0x80000000>;
 	};
 
 	reserved-memory {
Signature · 1 line
2.17.1
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#1 lore raw
Quoted 8 lines · Devarsh Thakkar

AM62A7-SK board has 4GB LPDDR4 Micron MT53E2G32D4DE-046 AUT:B memory but only 2GB was enabled early.

Enable full 4GB memory by updating the latter 2GB memory region which gets mapped to 0x0880000000 i.e. DDR16SS0_SDRAM as referred in Table 2-1. AM62A Common SoC Memory of AM62Ax TRM.

TRM : https://www.ti.com/lit/zip/spruj16

TRM makes no sense in this patch - it is the data sheet of the memory and part in schematics that is relevant

Looking at the design files (link from dts): https://www.ti.com/lit/zip/sprr459
E1 version of the board has MT53E2G32D4DE-046 Vs E2 version of the board is MT53E1G32D2FW-046

The 2GB is accurate for E1 version of the board, 4GB change implies that E1 version of the board is no longer supported.

Is the claim that E1 version of the board no longer supported? What happens to folks in the community who have an E1 board?

Quoted 3 lines

Logs:

Link https://gist.github.com/devarsht/e85b6af89c01ddadb3a62f3e5f196af8

Logs dont belong to the commit message. Also missing (if the patch is claiming a "fixes") is a Fixes tag.

Quoted 25 lines
Signed-off-by Devarsh Thakkar <[email protected]>
---
 arch/arm64/boot/dts/ti/k3-am62a7-sk.dts | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)
arch/arm64/boot/dts/ti/k3-am62a7-sk.dts +3 -2
index 5c9012141ee2..f6a67f072dca 100644
@@ -27,8 +27,9 @@
 
 	memory@80000000 {
 		device_type = "memory";
-		/* 2G RAM */
-		reg = <0x00000000 0x80000000 0x00000000 0x80000000>;
+		/* 4G RAM */
+		reg = <0x00000000 0x80000000 0x00000000 0x80000000>,
+		      <0x00000008 0x80000000 0x00000000 0x80000000>;
 	};
 
 	reserved-memory {
Signature · 1 line
2.17.1
Signature · 3 lines
Regards,
Nishanth Menon
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