From: Aswath Govindraju <a-govindraju@ti.com>
To: unlisted-recipients:; (no To-header on input)
Cc: Vignesh Raghavendra <vigneshr@ti.com>,
Lokesh Vutla <lokeshvutla@ti.com>,
Kishon Vijay Abraham I <kishon@ti.com>,
Aswath Govindraju <a-govindraju@ti.com>,
Nishanth Menon <nm@ti.com>, Tero Kristo <kristo@kernel.org>,
Rob Herring <robh+dt@kernel.org>,
<linux-arm-kernel@lists.infradead.org>,
<devicetree@vger.kernel.org>, <linux-kernel@vger.kernel.org>
Subject: [PATCH v2] arm64: dts: ti: k3-j7200-main: Add support for higher speed modes in MMCSD subsystems
Date: Mon, 25 Jan 2021 21:55:32 +0530 [thread overview]
Message-ID: <20210125162532.30845-1-a-govindraju@ti.com> (raw)
The following speed modes are now supported in J7200 SoC,
- HS200 and HS400 modes at 1.8 V card voltage, in MMCSD0 subsystem [1].
- UHS-I speed modes in MMCSD1 subsystem [1].
Set respective tags in sdhci0 and remove no-1-8-v tag from sdhci1 device
tree nodes.
[1] - section 12.3.6.1.1 MMCSD Features, in
https://www.ti.com/lit/ug/spruiu1a/spruiu1a.pdf
Signed-off-by: Aswath Govindraju <a-govindraju@ti.com>
---
performance test logs using EXT4 filesystem for eMMC HS400 speed mode,
https://pastebin.ubuntu.com/p/JnPs8DxV58/
performance test logs using EXT4 filesystem for SD SDR104 speed mode,
https://pastebin.ubuntu.com/p/KPGzBz8YwC/
Changes since v1:
- Squashed the two patches into one
- added performance logs for the above mentioned speed modes
arch/arm64/boot/dts/ti/k3-j7200-main.dtsi | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/arch/arm64/boot/dts/ti/k3-j7200-main.dtsi b/arch/arm64/boot/dts/ti/k3-j7200-main.dtsi
index 4cc2e9094d0e..4b3d0b5739e8 100644
--- a/arch/arm64/boot/dts/ti/k3-j7200-main.dtsi
+++ b/arch/arm64/boot/dts/ti/k3-j7200-main.dtsi
@@ -517,6 +517,8 @@
ti,trm-icp = <0x8>;
bus-width = <8>;
mmc-ddr-1_8v;
+ mmc-hs200-1_8v;
+ mmc-hs400-1_8v;
dma-coherent;
};
@@ -534,7 +536,6 @@
ti,otap-del-sel-sdr50 = <0xc>;
ti,otap-del-sel-sdr104 = <0x5>;
ti,otap-del-sel-ddr50 = <0xc>;
- no-1-8-v;
dma-coherent;
};
--
2.17.1
next reply other threads:[~2021-01-25 16:30 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-01-25 16:25 Aswath Govindraju [this message]
2021-01-27 11:47 ` [PATCH v2] arm64: dts: ti: k3-j7200-main: Add support for higher speed modes in MMCSD subsystems Aswath Govindraju
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