linux-kernel - Re: [PATCH v8 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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Date:   Thu, 25 Mar 2021 21:44:29 +0530
From:   Kishon Vijay Abraham I <kishon@...com>
To:     Aswath Govindraju <a-govindraju@...com>
CC:     Vignesh Raghavendra <vigneshr@...com>,
        Lokesh Vutla <lokeshvutla@...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: Re: [PATCH v8 3/3] arm64: dts: ti: k3-j7200: Add support for higher
 speed modes and update delay select values for MMCSD subsystems

Hi Aswath,

On 24/03/21 12:07 pm, Aswath Govindraju wrote:
> 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)
minor comments below.. once you fix them, please add

Reviewed-by: Kishon Vijay Abraham I <kishon@...com>
> 
> Signed-off-by: Aswath Govindraju <a-govindraju@...com>
> ---
>  .../dts/ti/k3-j7200-common-proc-board.dts     | 78 +++++++++++++++++++
>  arch/arm64/boot/dts/ti/k3-j7200-main.dtsi     | 14 +++-
>  2 files changed, 90 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..a069787e1783 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 +16,65 @@
>  		stdout-path = "serial2:115200n8";
>  		bootargs = "console=ttyS2,115200n8 earlycon=ns16550a,mmio32,0x02800000";
>  	};
> +
> +	evm_12v0: fixedregulator-evm12v0 {
> +		/* main supply */
> +		compatible = "regulator-fixed";
> +		regulator-name = "evm_12v0";
> +		regulator-min-microvolt = <12000000>;
> +		regulator-max-microvolt = <12000000>;
> +		regulator-always-on;
> +		regulator-boot-on;
> +	};
> +
> +	vsys_3v3: fixedregulator-vsys3v3 {
> +		/* Output of LMS140 */

%s/LMS140/LM5140
> +		compatible = "regulator-fixed";
> +		regulator-name = "vsys_3v3";
> +		regulator-min-microvolt = <3300000>;
> +		regulator-max-microvolt = <3300000>;
> +		vin-supply = <&evm_12v0>;
> +		regulator-always-on;
> +		regulator-boot-on;
> +	};
> +
> +	vsys_5v0: fixedregulator-vsys5v0 {
> +		/* Output of LM5140 */
> +		compatible = "regulator-fixed";
> +		regulator-name = "vsys_5v0";
> +		regulator-min-microvolt = <5000000>;
> +		regulator-max-microvolt = <5000000>;
> +		vin-supply = <&evm_12v0>;
> +		regulator-always-on;
> +		regulator-boot-on;
> +	};
> +
> +	vdd_mmc1: fixedregulator-sd {
> +		/* Output of TPS22918  */
> +		compatible = "regulator-fixed";
> +		regulator-name = "vdd_mmc1";
> +		regulator-min-microvolt = <3300000>;
> +		regulator-max-microvolt = <3300000>;
> +		regulator-boot-on;
> +		enable-active-high;
> +		vin-supply = <&vsys_3v3>;
> +		gpio = <&exp2 2 GPIO_ACTIVE_HIGH>;
> +	};
> +
> +	vdd_sd_dv: gpio-regulator-vdd-sd-dv {
> +		/* Output of TLV71033 */

Would have preferred to keep this similar to j721e.
gpio-regulator-TLV71033 is used in j721e
> +		compatible = "regulator-gpio";
> +		regulator-name = "vdd_sd_dv";

same comment here..
> +		pinctrl-names = "default";
> +		pinctrl-0 = <&vdd_sd_dv_pins_default>;
> +		regulator-min-microvolt = <1800000>;
> +		regulator-max-microvolt = <3300000>;
> +		regulator-boot-on;
> +		vin-supply = <&vsys_5v0>;
> +		gpios = <&main_gpio0 55 GPIO_ACTIVE_HIGH>;
> +		states = <1800000 0x0>,
> +			 <3300000 0x1>;
> +	};
>  };
>  
>  &wkup_pmx0 {
> @@ -45,6 +104,13 @@
>  };
>  
>  &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 +136,12 @@
>  			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 */

This should ideally be PIN_OUTPUT. Can you check the latest sysconfig?

Thanks
Kishon