The OPP table of mt8188 GPU contains duplicated frequencies
for different speed bins.

In order to support OPP table, we need to provide the speed bin info
in the efuse data so the GPU driver could properly set the
supported hardware speed bin.

Same as mt8186, the efuse data for mt8188's GPU speed binning
requires post-process to convert the bit field format expected
by the OPP table.

Signed-off-by: Pablo Sun <pablo.sun@mediatek.com>
---
 arch/arm64/boot/dts/mediatek/mt8188.dtsi | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/arch/arm64/boot/dts/mediatek/mt8188.dtsi b/arch/arm64/boot/dts/mediatek/mt8188.dtsi
index 02a5bb4dbd1f..2d9378c16e42 100644
--- a/arch/arm64/boot/dts/mediatek/mt8188.dtsi
+++ b/arch/arm64/boot/dts/mediatek/mt8188.dtsi
@@ -1744,7 +1744,7 @@ imp_iic_wrap_en: clock-controller@11ec2000 {
 		};
 
 		efuse: efuse@11f20000 {
-			compatible = "mediatek,mt8188-efuse", "mediatek,efuse";
+			compatible = "mediatek,mt8188-efuse", "mediatek,mt8186-efuse";
 			reg = <0 0x11f20000 0 0x1000>;
 			#address-cells = <1>;
 			#size-cells = <1>;
@@ -1752,6 +1752,11 @@ efuse: efuse@11f20000 {
 			lvts_efuse_data1: lvts1-calib@1ac {
 				reg = <0x1ac 0x40>;
 			};
+
+			gpu_speedbin: gpu-speedbin@580 {
+				reg = <0x581 0x1>;
+				bits = <0 3>;
+			};
 		};
 
 		gpu: gpu@13000000 {
@@ -1763,6 +1768,8 @@ gpu: gpu@13000000 {
 				     <GIC_SPI 382 IRQ_TYPE_LEVEL_HIGH 0>,
 				     <GIC_SPI 381 IRQ_TYPE_LEVEL_HIGH 0>;
 			interrupt-names = "job", "mmu", "gpu";
+			nvmem-cells = <&gpu_speedbin>;
+			nvmem-cell-names = "speed-bin";
 			operating-points-v2 = <&gpu_opp_table>;
 			power-domains = <&spm MT8188_POWER_DOMAIN_MFG2>,
 					<&spm MT8188_POWER_DOMAIN_MFG3>,
-- 
2.45.2