dts64: mt7622: fix slow sd card access
Subsystems (3)
PATCH v2 1/1 dts64: mt7622: fix slow sd card access
From: Frank Wunderlich <[email protected]>
Fix extreme slow speed (200MB takes ~20 min) on writing sdcard on bananapi-r64 by adding reset-control for mmc1 like it's done for mmc0/emmc.
---
changes since v1:
- drop change to uhs-mode because mt7622 does not support it
--- arch/arm64/boot/dts/mediatek/mt7622.dtsi | 2 ++ 1 file changed, 2 insertions(+)
arch/arm64/boot/dts/mediatek/mt7622.dtsi +2 -0
@@ -698,6 +698,8 @@ mmc1: mmc@11240000 { clocks = <&pericfg CLK_PERI_MSDC30_1_PD>, <&topckgen CLK_TOP_AXI_SEL>; clock-names = "source", "hclk"; + resets = <&pericfg MT7622_PERI_MSDC1_SW_RST>; + reset-names = "hrst"; status = "disabled"; };
Signature · 7 lines
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Quoted 20 lines · Frank Wunderlich
From: Frank Wunderlich <[email protected]>
Fix extreme slow speed (200MB takes ~20 min) on writing sdcard on bananapi-r64 by adding reset-control for mmc1 like it's done for mmc0/emmc.
Fixes 2c002a3049f7 ("arm64: dts: mt7622: add mmc related device nodes")Signed-off-by Frank Wunderlich <[email protected]>---
changes since v1:
- drop change to uhs-mode because mt7622 does not support it--- arch/arm64/boot/dts/mediatek/mt7622.dtsi | 2 ++ 1 file changed, 2 insertions(+)arch/arm64/boot/dts/mediatek/mt7622.dtsi +0
-0
arch/arm64/boot/dts/mediatek/mt7622.dtsi mmc1: mmc@11240000 { · line 702
Quoted 5 lines
arch/arm64/boot/dts/mediatek/mt7622.dtsi +2
-0@@ -698,6 +698,8 @@ mmc1: mmc@11240000 { clocks = <&pericfg CLK_PERI_MSDC30_1_PD>, <&topckgen CLK_TOP_AXI_SEL>; clock-names = "source", "hclk"; + resets = <&pericfg MT7622_PERI_MSDC1_SW_RST>; + reset-names = "hrst";
This looks ok to me. I think it's also necessary to trigger software reset for SD(mmc1) because loader(uboot) might mess up MSDC's registers. "Software reset" here will reset registers of AHB/AXI bus domain, such as MSDC_CFG[8:15]. msdc_reset_hw() in mtk-sd.c will only reset registers of MSDC CK domain.
Quoted 8 lines · Frank Wunderlich
From: Frank Wunderlich <[email protected]>
Fix extreme slow speed (200MB takes ~20 min) on writing sdcard on bananapi-r64 by adding reset-control for mmc1 like it's done for mmc0/emmc.
Fixes 2c002a3049f7 ("arm64: dts: mt7622: add mmc related device nodes")Signed-off-by Frank Wunderlich <[email protected]>
Applied to v5.11-next/dts64
Thanks!
Quoted 13 lines
---
changes since v1:
- drop change to uhs-mode because mt7622 does not support it--- arch/arm64/boot/dts/mediatek/mt7622.dtsi | 2 ++ 1 file changed, 2 insertions(+)arch/arm64/boot/dts/mediatek/mt7622.dtsi +0
-0
arch/arm64/boot/dts/mediatek/mt7622.dtsi mmc1: mmc@11240000 { · line 705
Quoted 8 lines
arch/arm64/boot/dts/mediatek/mt7622.dtsi +2
-0@@ -698,6 +698,8 @@ mmc1: mmc@11240000 { clocks = <&pericfg CLK_PERI_MSDC30_1_PD>, <&topckgen CLK_TOP_AXI_SEL>; clock-names = "source", "hclk"; + resets = <&pericfg MT7622_PERI_MSDC1_SW_RST>; + reset-names = "hrst"; status = "disabled"; };
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