[PATCH] arm: dts: Enable full 4GB LPDDR4
AM62A7-SK board has 4GB LPDDR4 Micron MT53E2G32D4DE-046 AUT:B part 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 [1].
[1] : https://www.ti.com/lit/zip/spruj16 Logs: https://gist.github.com/devarsht/e85b6af89c01ddadb3a62f3e5f196af8
Signed-off-by: Devarsh Thakkar devarsht@ti.com --- arch/arm/dts/k3-am62a7-r5-sk.dts | 4 +++- arch/arm/dts/k3-am62a7-sk.dts | 5 +++-- 2 files changed, 6 insertions(+), 3 deletions(-)
diff --git a/arch/arm/dts/k3-am62a7-r5-sk.dts b/arch/arm/dts/k3-am62a7-r5-sk.dts index 58b7c8ad05..bead57dffe 100644 --- a/arch/arm/dts/k3-am62a7-r5-sk.dts +++ b/arch/arm/dts/k3-am62a7-r5-sk.dts @@ -25,7 +25,9 @@
memory@80000000 { device_type = "memory"; - reg = <0x00000000 0x80000000 0x00000000 0x80000000>; /* 2G RAM */ + /* 4G RAM */ + reg = <0x00000000 0x80000000 0x00000000 0x80000000>, + <0x00000008 0x80000000 0x00000000 0x80000000>; u-boot,dm-spl; };
diff --git a/arch/arm/dts/k3-am62a7-sk.dts b/arch/arm/dts/k3-am62a7-sk.dts index 576dbce80a..b08a083d72 100644 --- a/arch/arm/dts/k3-am62a7-sk.dts +++ b/arch/arm/dts/k3-am62a7-sk.dts @@ -26,8 +26,9 @@
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 {
On Mon, Feb 06, 2023 at 05:04:51PM +0530, Devarsh Thakkar wrote:
AM62A7-SK board has 4GB LPDDR4 Micron MT53E2G32D4DE-046 AUT:B part 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 [1].
[1] : https://www.ti.com/lit/zip/spruj16 Logs: https://gist.github.com/devarsht/e85b6af89c01ddadb3a62f3e5f196af8
Signed-off-by: Devarsh Thakkar devarsht@ti.com
arch/arm/dts/k3-am62a7-r5-sk.dts | 4 +++- arch/arm/dts/k3-am62a7-sk.dts | 5 +++-- 2 files changed, 6 insertions(+), 3 deletions(-)
The subject should include am62x in it, and what is the status of the changes to k3-am62a7-sk.dts upstream?
Hi Tom, Bryan,
Thanks for the review. On 06/02/23 20:22, Tom Rini wrote:
On Mon, Feb 06, 2023 at 05:04:51PM +0530, Devarsh Thakkar wrote:
AM62A7-SK board has 4GB LPDDR4 Micron MT53E2G32D4DE-046 AUT:B part 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 [1].
[1] : https://www.ti.com/lit/zip/spruj16 Logs: https://gist.github.com/devarsht/e85b6af89c01ddadb3a62f3e5f196af8
Signed-off-by: Devarsh Thakkar devarsht@ti.com
arch/arm/dts/k3-am62a7-r5-sk.dts | 4 +++- arch/arm/dts/k3-am62a7-sk.dts | 5 +++-- 2 files changed, 6 insertions(+), 3 deletions(-)
The subject should include am62x in it,
It's am62ax actually, will add that in subject in V2. and what is the status of the
changes to k3-am62a7-sk.dts upstream?
Below is the corresponding kernel patch: https://lore.kernel.org/all/20230206115240.6026-1-devarsht@ti.com/
Regards Devarsh
Hi Devarsh!
On February 6, 2023 thus sayeth Devarsh Thakkar:
AM62A7-SK board has 4GB LPDDR4 Micron MT53E2G32D4DE-046 AUT:B part 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 [1].
[1] : https://www.ti.com/lit/zip/spruj16 Logs: https://gist.github.com/devarsht/e85b6af89c01ddadb3a62f3e5f196af8
Signed-off-by: Devarsh Thakkar devarsht@ti.com
Thanks for getting this fixed! Unfortunately, to keep our device trees in sync with the linux kernel, I think it's best we get this accepted in linux before we pull this into uboot
Thanks Again ~Bryan
On Mon, Feb 06, 2023 at 05:04:51PM +0530, Devarsh Thakkar wrote:
AM62A7-SK board has 4GB LPDDR4 Micron MT53E2G32D4DE-046 AUT:B part 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 [1].
[1] : https://www.ti.com/lit/zip/spruj16 Logs: https://gist.github.com/devarsht/e85b6af89c01ddadb3a62f3e5f196af8
Signed-off-by: Devarsh Thakkar devarsht@ti.com
Applied to u-boot/next, thanks!
participants (3)
-
Bryan Brattlof -
Devarsh Thakkar -
Tom Rini