linux-kernel - [PATCH v2 15/18] ARM: dts: s5pv210: Assign clocks to MMC devices on aries

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Message-ID: <BN6PR04MB06601888FBEC1B871D908D4BA3AB0@BN6PR04MB0660.namprd04.prod.outlook.com>
Date:   Fri,  1 May 2020 16:50:16 -0700
From:   Jonathan Bakker <xc-racer2@...e.ca>
To:     kgene@...nel.org, krzk@...nel.org, robh+dt@...nel.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-samsung-soc@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Cc:     Jonathan Bakker <xc-racer2@...e.ca>
Subject: [PATCH v2 15/18] ARM: dts: s5pv210: Assign clocks to MMC devices on aries

The SHDCI controller on aries devices is a little bit peculiar about
the clocks and with a slightly off clock can run into errors such as

[ 141.533993] mmc2: ADMA error: 0x02000000
[ 141.535137] mmc2: sdhci: ============ SDHCI REGISTER DUMP ===========
[ 141.540246] mmc2: sdhci: Sys addr: 0x347e4cc4 | Version: 0x00002401
[ 141.545358] mmc2: sdhci: Blk size: 0x00007004 | Blk cnt: 0x0000fffc
[ 141.550470] mmc2: sdhci: Argument: 0x00000000 | Trn mode: 0x00000013
[ 141.555583] mmc2: sdhci: Present: 0x01fa0000 | Host ctl: 0x00000012
[ 141.560696] mmc2: sdhci: Power: 0x00000000 | Blk gap: 0x00000000
[ 141.565809] mmc2: sdhci: Wake-up: 0x00000000 | Clock: 0x0000010f
[ 141.570921] mmc2: sdhci: Timeout: 0x0000000a | Int stat: 0x00000003
[ 141.576034] mmc2: sdhci: Int enab: 0x03ff004b | Sig enab: 0x03ff004b
[ 141.581147] mmc2: sdhci: ACmd stat: 0x00000000 | Slot int: 0x00000001
[ 141.586259] mmc2: sdhci: Caps: 0x05e80080 | Caps_1: 0x00000000
[ 141.591372] mmc2: sdhci: Cmd: 0x0000163a | Max curr: 0x00000000
[ 141.596485] mmc2: sdhci: Resp[0]: 0x00000920 | Resp[1]: 0x00000000
[ 141.601597] mmc2: sdhci: Resp[2]: 0x00000000 | Resp[3]: 0x00000000
[ 141.606710] mmc2: sdhci: Host ctl2: 0x00000000
[ 141.609831] mmc2: sdhci: ADMA Err: 0x00000000 | ADMA Ptr: 0x349a3208
[ 141.614942] mmc2: sdhci: ============================================
[ 141.620057] mmc2: sdhci: 349a3200: DMA 0x347e4cc0, LEN 0x0004, Attr=0x23

Specifically assign the mmc sclks to be parented from MPLL with specific
rates that match the vendor kernel.

Signed-off-by: Jonathan Bakker <xc-racer2@...e.ca>
---
 arch/arm/boot/dts/s5pv210-aries.dtsi  | 8 ++++++++
 arch/arm/boot/dts/s5pv210-galaxys.dts | 4 ++++
 2 files changed, 12 insertions(+)

diff --git a/arch/arm/boot/dts/s5pv210-aries.dtsi b/arch/arm/boot/dts/s5pv210-aries.dtsi
index 9f4694d71203..0bd65401ec65 100644
--- a/arch/arm/boot/dts/s5pv210-aries.dtsi
+++ b/arch/arm/boot/dts/s5pv210-aries.dtsi
@@ -752,6 +752,10 @@
 	non-removable;
 	status = "okay";
 
+	assigned-clocks = <&clocks MOUT_MMC1>, <&clocks SCLK_MMC1>;
+	assigned-clock-rates = <0>, <50000000>;
+	assigned-clock-parents = <&clocks MOUT_MPLL>;
+
 	wlan@1 {
 		reg = <1>;
 		compatible = "brcm,bcm4329-fmac";
@@ -768,6 +772,10 @@
 	pinctrl-0 = <&sd2_clk &sd2_cmd &sd2_bus4 &tf_detect>;
 	pinctrl-names = "default";
 	status = "okay";
+
+	assigned-clocks = <&clocks MOUT_MMC2>, <&clocks SCLK_MMC2>;
+	assigned-clock-rates = <0>, <50000000>;
+	assigned-clock-parents = <&clocks MOUT_MPLL>;
 };
 
 &uart0 {
diff --git a/arch/arm/boot/dts/s5pv210-galaxys.dts b/arch/arm/boot/dts/s5pv210-galaxys.dts
index a99fdda25262..5d10dd67eacc 100644
--- a/arch/arm/boot/dts/s5pv210-galaxys.dts
+++ b/arch/arm/boot/dts/s5pv210-galaxys.dts
@@ -355,4 +355,8 @@
 	pinctrl-0 = <&sd0_clk &sd0_cmd &sd0_bus4>;
 	pinctrl-names = "default";
 	status = "okay";
+
+	assigned-clocks = <&clocks MOUT_MMC0>, <&clocks SCLK_MMC0>;
+	assigned-clock-rates = <0>, <52000000>;
+	assigned-clock-parents = <&clocks MOUT_MPLL>;
 };
-- 
2.20.1