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SubjectRe: [PATCH v5 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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Hi,

On 10/03/21 9:49 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 latest J7200 datasheet[2]

nit: Better to mention the datasheet version (as it's not latest anymore).
>
> [1] - section 12.3.6.1.1 MMCSD Features, in
> https://www.ti.com/lit/ug/spruiu1a/spruiu1a.pdf
>
> [2] - https://www.ti.com/lit/ds/symlink/dra821a.pdf

Er.. this link is already broken.

Thanks
Kishon
>
> Signed-off-by: Aswath Govindraju <a-govindraju@ti.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;
> };
>
>

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