linux-kernel - [PATCH v6 3/3] arm64: dts: ti: k3-j7200: Add support for higher speed modes and update delay select values for MMCSD subsystems

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Message-ID: <20210319034422.17630-4-a-govindraju@ti.com>
Date:   Fri, 19 Mar 2021 09:14:21 +0530
From:   Aswath Govindraju <a-govindraju@...com>
To:     unlisted-recipients:; (no To-header on input)
CC:     Vignesh Raghavendra <vigneshr@...com>,
        Lokesh Vutla <lokeshvutla@...com>,
        Kishon Vijay Abraham I <kishon@...com>,
        Aswath Govindraju <a-govindraju@...com>,
        Nishanth Menon <nm@...com>, Tero Kristo <kristo@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: [PATCH v6 3/3] arm64: dts: ti: k3-j7200: Add support for higher speed modes and update delay select values for MMCSD subsystems

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].

Add support for UHS-I modes by adding voltage regulator device tree nodes
and corresponding pinmux details, to power cycle and voltage switch cards.
Set respective tags in sdhci0 and remove no-1-8-v tag from sdhci1
device tree nodes.

Also update the delay values for various speed modes supported, based on
the revised january 2021 J7200 datasheet[2].

[1] - section 12.3.6.1.1 MMCSD Features, in
      https://www.ti.com/lit/ug/spruiu1a/spruiu1a.pdf,
      (SPRUIU1A – JULY 2020 – REVISED JANUARY 2021)

[2] - https://www.ti.com/lit/ds/symlink/dra821u.pdf,
      (SPRSP57B – APRIL 2020 – REVISED JANUARY 2021)

Signed-off-by: Aswath Govindraju <a-govindraju@...com>
---
 .../dts/ti/k3-j7200-common-proc-board.dts     | 42 +++++++++++++++++++
 arch/arm64/boot/dts/ti/k3-j7200-main.dtsi     | 14 ++++++-
 2 files changed, 54 insertions(+), 2 deletions(-)

diff --git a/arch/arm64/boot/dts/ti/k3-j7200-common-proc-board.dts b/arch/arm64/boot/dts/ti/k3-j7200-common-proc-board.dts
index b493f939b09a..6f90c3b1cf45 100644
--- a/arch/arm64/boot/dts/ti/k3-j7200-common-proc-board.dts
+++ b/arch/arm64/boot/dts/ti/k3-j7200-common-proc-board.dts
@@ -16,6 +16,29 @@
 		stdout-path = "serial2:115200n8";
 		bootargs = "console=ttyS2,115200n8 earlycon=ns16550a,mmio32,0x02800000";
 	};
+
+	vdd_mmc1: fixedregulator-sd {
+		compatible = "regulator-fixed";
+		regulator-name = "vdd_mmc1";
+		regulator-min-microvolt = <3300000>;
+		regulator-max-microvolt = <3300000>;
+		regulator-boot-on;
+		enable-active-high;
+		gpios = <&exp2 2 GPIO_ACTIVE_HIGH>;
+	};
+
+	vdd_sd_dv: gpio-regulator-vdd-sd-dv {
+		compatible = "regulator-gpio";
+		regulator-name = "vdd_sd_dv";
+		pinctrl-names = "default";
+		pinctrl-0 = <&vdd_sd_dv_pins_default>;
+		regulator-min-microvolt = <1800000>;
+		regulator-max-microvolt = <3300000>;
+		regulator-boot-on;
+		gpios = <&main_gpio0 55 GPIO_ACTIVE_HIGH>;
+		states = <1800000 0x0
+			  3300000 0x1>;
+	};
 };
 
 &wkup_pmx0 {
@@ -45,6 +68,13 @@
 };
 
 &main_pmx0 {
+	main_i2c0_pins_default: main-i2c0-pins-default {
+		pinctrl-single,pins = <
+			J721E_IOPAD(0xd4, PIN_INPUT_PULLUP, 0) /* (V3) I2C0_SCL */
+			J721E_IOPAD(0xd8, PIN_INPUT_PULLUP, 0) /* (W2) I2C0_SDA */
+		>;
+	};
+
 	main_i2c1_pins_default: main-i2c1-pins-default {
 		pinctrl-single,pins = <
 			J721E_IOPAD(0xdc, PIN_INPUT_PULLUP, 3) /* (U3) ECAP0_IN_APWM_OUT.I2C1_SCL */
@@ -70,6 +100,12 @@
 			J721E_IOPAD(0x120, PIN_OUTPUT, 0) /* (T4) USB0_DRVVBUS */
 		>;
 	};
+
+	vdd_sd_dv_pins_default: vdd_sd_dv_pins_default {
+		pinctrl-single,pins = <
+			J721E_IOPAD(0xd0, PIN_INPUT, 7) /* (T5) SPI0_D1.GPIO0_55 */
+		>;
+	};
 };
 
 &wkup_uart0 {
@@ -157,6 +193,10 @@
 };
 
 &main_i2c0 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&main_i2c0_pins_default>;
+	clock-frequency = <400000>;
+
 	exp1: gpio@20 {
 		compatible = "ti,tca6416";
 		reg = <0x20>;
@@ -206,6 +246,8 @@
 	/* SD card */
 	pinctrl-0 = <&main_mmc1_pins_default>;
 	pinctrl-names = "default";
+	vmmc-supply = <&vdd_mmc1>;
+	vqmmc-supply = <&vdd_sd_dv>;
 	ti,driver-strength-ohm = <50>;
 	disable-wp;
 };
diff --git a/arch/arm64/boot/dts/ti/k3-j7200-main.dtsi b/arch/arm64/boot/dts/ti/k3-j7200-main.dtsi
index e60650a62b14..f86c493a44f1 100644
--- a/arch/arm64/boot/dts/ti/k3-j7200-main.dtsi
+++ b/arch/arm64/boot/dts/ti/k3-j7200-main.dtsi
@@ -512,11 +512,16 @@
 		ti,otap-del-sel-mmc-hs = <0x0>;
 		ti,otap-del-sel-ddr52 = <0x6>;
 		ti,otap-del-sel-hs200 = <0x8>;
-		ti,otap-del-sel-hs400 = <0x0>;
+		ti,otap-del-sel-hs400 = <0x5>;
+		ti,itap-del-sel-legacy = <0x10>;
+		ti,itap-del-sel-mmc-hs = <0xa>;
 		ti,strobe-sel = <0x77>;
+		ti,clkbuf-sel = <0x7>;
 		ti,trm-icp = <0x8>;
 		bus-width = <8>;
 		mmc-ddr-1_8v;
+		mmc-hs200-1_8v;
+		mmc-hs400-1_8v;
 		dma-coherent;
 	};
 
@@ -534,7 +539,12 @@
 		ti,otap-del-sel-sdr50 = <0xc>;
 		ti,otap-del-sel-sdr104 = <0x5>;
 		ti,otap-del-sel-ddr50 = <0xc>;
-		no-1-8-v;
+		ti,itap-del-sel-legacy = <0x0>;
+		ti,itap-del-sel-sd-hs = <0x0>;
+		ti,itap-del-sel-sdr12 = <0x0>;
+		ti,itap-del-sel-sdr25 = <0x0>;
+		ti,clkbuf-sel = <0x7>;
+		ti,trm-icp = <0x8>;
 		dma-coherent;
 	};
 
-- 
2.17.1