Re: [PATCH] riscv: dts: starfive: Update flash partition layout

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On 6/3/24 18:10, Emil Renner Berthing wrote:
matthias.bgg@ wrote:
From: Matthias Brugger <matthias.bgg@xxxxxxxxx>

Up to now, the describe flash partition layout has some gaps.
Use the whole flash chip by getting rid of the gaps.

Suggested-by: Heinrich Schuchardt <heinrich.schuchardt@xxxxxxxxxxxxx>
Signed-off-by: Matthias Brugger <matthias.bgg@xxxxxxxxx>

Hi Matthias,

Thanks for the patch.


---

  arch/riscv/boot/dts/starfive/jh7110-common.dtsi | 7 ++-----
  1 file changed, 2 insertions(+), 5 deletions(-)

diff --git a/arch/riscv/boot/dts/starfive/jh7110-common.dtsi b/arch/riscv/boot/dts/starfive/jh7110-common.dtsi
index 8ff6ea64f0489..37b4c294ffcc5 100644
--- a/arch/riscv/boot/dts/starfive/jh7110-common.dtsi
+++ b/arch/riscv/boot/dts/starfive/jh7110-common.dtsi
@@ -321,16 +321,13 @@ partitions {
  			#size-cells = <1>;

  			spl@0 {
-				reg = <0x0 0x80000>;
+				reg = <0x0 0xf0000>;

..this is definitely fine, but..

  			};
  			uboot-env@f0000 {
  				reg = <0xf0000 0x10000>;
  			};
  			uboot@100000 {
-				reg = <0x100000 0x400000>;
-			};
-			reserved-data@600000 {
-				reg = <0x600000 0xa00000>;
+				reg = <0x100000 0xf00000>;

Do we know that all of the VF2 1.2A, VF2 1.3B and Milk-V Mars boards have at
least 15kB SPI flash chips? In other words were there a reason this previously
ended at 10kB?

Also it looks like my Mars board and VF2 1.3B both report discovering a
"gd25lq128d" chip of 16kB, so why stop at 15kB?

Hello Emil,

0xf00000 (15 MiB) is the value of the size-cell. gd25lq128d has 128 Mbit (=16 MiB).

Cf. the examples in Documentation/devicetree/bindings/mtd/partitions/fixed-partitions.yaml

The prior partition scheme had a partition 'reserved-data' also ending at 16 MiB. We don't change the expected size with the current patch.

Best regards

Heinrich


/Emil





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