Configure OSD32MP15x for 1.8V I/O operation
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Hi,
We are trying to enable 1.8V on our custom board based on OSD32MP157F SiP.
We are not using MicroSD card at sdmmc1. Only using eMMC at sdmmc2 and WiFi module LBEE5HY1MW at sdmmc3.
We’ve made all the required changes in hardware, PMIC NVM registers and device tree but its not working and appears to be stuck at u-boot.
We’ve made following hardware changes (with respect to OSD32MP1 RED board)
- Connected BYPASS_REG1V8 to VDD_INTRNL.
- Connected VDDA1V8_REG to VDD_INTRNL.
- Left the strapping option pin of wireless module LBEE5HY1MW open.
- Programmed the PMIC NVM registers to generate 1.8V at VBUCK_VOUT3 and VBUCK_VOUT4
- Programmed the PMIC NVM registers to generate 3.3V at PMIC_LDO5
We’ve made following kernel and tfa devcie tree changes. U-Boot device tree is same as Kernel device tree.
Kernel device tree changes
- vdd:buck3 @ 1.8V
- v3v3:buck4 @ 1.8V
- v3v3_eth:ldo5 @ 3.3V
/* Kernel device tree changes code snippet */ /* PMIC */ &i2c4{ u-boot,dm-pre-reloc; pinctrl-names = "default", "sleep"; pinctrl-0 = <&i2c4_pins_z_mx>; pinctrl-1 = <&i2c4_sleep_pins_z_mx>; status = "okay"; i2c-scl-rising-time-ns = <185>; i2c-scl-falling-time-ns = <20>; clock-frequency = <400000>; /delete-property/ dmas; /delete-property/ dma-names; pmic:stpmic@33{ compatible = "st,stpmic1"; reg = <0x33>; interrupts-extended = <&exti_pwr 55 IRQ_TYPE_EDGE_FALLING>; interrupt-controller; #interrupt-cells = <2>; status = "okay"; st,main-control-register = <0x04>; st,vin-control-register = <0xc0>; st,usb-control-register = <0x20>; regulators{ compatible = "st,stpmic1-regulators"; buck1-supply = <&vin>; buck2-supply = <&vin>; buck3-supply = <&vin>; buck4-supply = <&vin>; ldo1-supply = <&v3v3>; ldo2-supply = <&vin>; ldo3-supply = <&vdd_ddr>; ldo4-supply = <&vin>; ldo5-supply = <&vin>; ldo6-supply = <&v3v3>; vref_ddr-supply = <&vin>; boost-supply = <&vin>; pwr_sw1-supply = <&bst_out>; pwr_sw2-supply = <&bst_out>; vddcore:buck1{ regulator-name = "vddcore"; regulator-min-microvolt = <1200000>; regulator-max-microvolt = <1350000>; regulator-always-on; regulator-initial-mode = <0>; regulator-over-current-protection; }; vdd_ddr:buck2{ regulator-name = "vdd_ddr"; regulator-min-microvolt = <1350000>; regulator-max-microvolt = <1350000>; regulator-always-on; regulator-initial-mode = <0>; regulator-over-current-protection; }; vdd:buck3{ regulator-name = "vdd"; regulator-min-microvolt = <1800000>; regulator-max-microvolt = <1800000>; regulator-always-on; st,mask-reset; regulator-initial-mode = <0>; regulator-over-current-protection; }; v3v3:buck4{ regulator-name = "v3v3"; regulator-min-microvolt = <1800000>; regulator-max-microvolt = <1800000>; regulator-always-on; regulator-over-current-protection; regulator-initial-mode = <0>; }; v1v8_audio:ldo1{ regulator-name = "v1v8_audio"; regulator-min-microvolt = <1800000>; regulator-max-microvolt = <1800000>; regulator-always-on; interrupts = ; }; v3v3_hdmi:ldo2{ regulator-name = "v3v3_hdmi"; regulator-min-microvolt = <3300000>; regulator-max-microvolt = <3300000>; regulator-always-on; interrupts = ; }; vtt_ddr:ldo3{ regulator-name = "vtt_ddr"; regulator-min-microvolt = <500000>; regulator-max-microvolt = <750000>; regulator-always-on; regulator-over-current-protection; }; vdd_usb:ldo4{ regulator-name = "vdd_usb"; interrupts = ; }; v3v3_eth:ldo5{ regulator-name = "v3v3_eth"; regulator-min-microvolt = <3300000>; regulator-max-microvolt = <3300000>; regulator-always-on; interrupts = ; }; v3v3_dsi:ldo6{ regulator-name = "v3v3_dsi"; regulator-min-microvolt = <3300000>; regulator-max-microvolt = <3300000>; regulator-always-on; interrupts = ; }; vref_ddr:vref_ddr{ regulator-name = "vref_ddr"; regulator-always-on; regulator-over-current-protection; }; bst_out:boost{ regulator-name = "bst_out"; interrupts = ; regulator-always-on; }; vbus_otg:pwr_sw1{ regulator-name = "vbus_otg"; interrupts = ; regulator-active-discharge; regulator-always-on; }; vbus_sw:pwr_sw2{ regulator-name = "vbus_sw"; interrupts = ; regulator-active-discharge = <1>; regulator-always-on; }; }; onkey{ compatible = "st,stpmic1-onkey"; interrupts = , ; interrupt-names = "onkey-falling", "onkey-rising"; power-off-time-sec = <10>; status = "okay"; }; watchdog { compatible = "st,stpmic1-wdt"; status = "disabled"; }; }; eeprom@50 { compatible = "atmel,24c02"; reg = <0x50>; pagesize = <16>; }; }; &pwr_regulators { vdd-supply = <&vdd>; vdd_3v3_usbfs-supply = <&vdd_usb>; }; /* eMMC */ &sdmmc2{ u-boot,dm-pre-reloc; pinctrl-names = "default", "opendrain", "sleep"; pinctrl-0 = <&sdmmc2_pins_mx>; pinctrl-1 = <&sdmmc2_opendrain_pins_mx>; pinctrl-2 = <&sdmmc2_sleep_pins_mx>; status = "okay"; non-removable; no-sd; no-sdio; st,neg-edge; bus-width = <8>; vmmc-supply = <&v3v3_eth>; vqmmc-supply = <&v3v3>; max-frequency = <150000000>; mmc-hs200-1_8v; }; /* WiFi */ &sdmmc3{ pinctrl-names = "default", "opendrain", "sleep"; pinctrl-0 = <&sdmmc3_pins_mx>; pinctrl-1 = <&sdmmc3_opendrain_pins_mx>; pinctrl-2 = <&sdmmc3_sleep_pins_mx>; arm,primecell-periphid = <0x10153180>; non-removable; st,neg-edge; bus-width = <4>; vmmc-supply = <&v3v3>; mmc-pwrseq = <&wifi_pwrseq>; #address-cells = <1>; #size-cells = <0>; keep-power-in-suspend; mmc-ddr-1_8v; max-frequency = <50000000>; status = "okay"; brcmf: bcrmf@1 { reg = <1>; compatible = "brcm,bcm4329-fmac"; }; };TFA device tree changes
- vdd: buck3 @ 1.8V
- v3v3: buck4 @ 1.8V
- vdda: ldo5 @ 3.3V
/* TFA device tree changes code snippet */ /* PMIC */ &i2c4 { pinctrl-names = "default"; pinctrl-0 = <&i2c4_pins_z_mx>; i2c-scl-rising-time-ns = <185>; i2c-scl-falling-time-ns = <20>; clock-frequency = <400000>; status = "okay"; secure-status = "okay"; pmic: stpmic@33 { compatible = "st,stpmic1"; reg = <0x33>; interrupts-extended = <&exti_pwr 55 IRQ_TYPE_EDGE_FALLING>; interrupt-controller; #interrupt-cells = <2>; status = "okay"; secure-status = "okay"; regulators { compatible = "st,stpmic1-regulators"; buck1-supply = <&vin>; buck2-supply = <&vin>; buck3-supply = <&vin>; buck4-supply = <&vin>; ldo1-supply = <&v3v3>; ldo2-supply = <&vin>; ldo3-supply = <&vdd_ddr>; ldo4-supply = <&vin>; ldo5-supply = <&vin>; ldo6-supply = <&v3v3>; vref_ddr-supply = <&vin>; boost-supply = <&vin>; pwr_sw1-supply = <&bst_out>; pwr_sw2-supply = <&bst_out>; vddcore: buck1 { regulator-name = "vddcore"; regulator-min-microvolt = <1200000>; regulator-max-microvolt = <1350000>; regulator-always-on; regulator-initial-mode = <0>; regulator-over-current-protection; lp-stop{ regulator-on-in-suspend; regulator-suspend-microvolt = <1200000>; }; standby-ddr-sr{ regulator-off-in-suspend; }; standby-ddr-off{ regulator-off-in-suspend; }; }; vdd_ddr: buck2 { regulator-name = "vdd_ddr"; regulator-min-microvolt = <1350000>; regulator-max-microvolt = <1350000>; regulator-always-on; regulator-initial-mode = <0>; regulator-over-current-protection; lp-stop{ regulator-suspend-microvolt = <1350000>; regulator-on-in-suspend; }; standby-ddr-sr{ regulator-suspend-microvolt = <1350000>; regulator-on-in-suspend; }; standby-ddr-off{ regulator-off-in-suspend; }; }; vdd: buck3 { regulator-name = "vdd"; regulator-min-microvolt = <1800000>; regulator-max-microvolt = <1800000>; regulator-always-on; st,mask-reset; regulator-initial-mode = <0>; regulator-over-current-protection; lp-stop{ regulator-suspend-microvolt = <1800000>; regulator-on-in-suspend; }; standby-ddr-sr{ regulator-suspend-microvolt = <1800000>; regulator-on-in-suspend; }; standby-ddr-off{ regulator-suspend-microvolt = <1800000>; regulator-on-in-suspend; }; }; v3v3: buck4 { regulator-name = "v3v3"; regulator-min-microvolt = <1800000>; regulator-max-microvolt = <1800000>; regulator-always-on; regulator-over-current-protection; regulator-initial-mode = <0>; lp-stop{ regulator-suspend-microvolt = <1800000>; regulator-on-in-suspend; }; standby-ddr-sr{ regulator-off-in-suspend; }; standby-ddr-off{ regulator-off-in-suspend; }; }; v1v8_ldo1: ldo1 { regulator-name = "v1v8_audio"; regulator-min-microvolt = <1800000>; regulator-max-microvolt = <1800000>; regulator-always-on; standby-ddr-sr{ regulator-off-in-suspend; }; standby-ddr-off{ regulator-off-in-suspend; }; }; v3v3_ldo2: ldo2 { regulator-name = "v3v3_hdmi"; regulator-min-microvolt = <3300000>; regulator-max-microvolt = <3300000>; regulator-always-on; standby-ddr-sr{ regulator-off-in-suspend; }; standby-ddr-off{ regulator-off-in-suspend; }; }; vtt_ddr: ldo3 { regulator-name = "vtt_ddr"; regulator-min-microvolt = <500000>; regulator-max-microvolt = <750000>; regulator-always-on; regulator-over-current-protection; lp-stop{ regulator-off-in-suspend; }; standby-ddr-sr{ regulator-off-in-suspend; }; standby-ddr-off{ regulator-off-in-suspend; }; }; vdd_usb: ldo4 { regulator-name = "vdd_usb"; regulator-min-microvolt = <3300000>; regulator-max-microvolt = <3300000>; regulator-always-on; standby-ddr-sr{ regulator-on-in-suspend; }; standby-ddr-off{ regulator-off-in-suspend; }; }; vdda: ldo5 { regulator-name = "vdda"; regulator-min-microvolt = <3300000>; regulator-max-microvolt = <3300000>; regulator-always-on; standby-ddr-sr{ regulator-suspend-microvolt = <3300000>; regulator-on-in-suspend; }; standby-ddr-off{ regulator-suspend-microvolt = <3300000>; regulator-on-in-suspend; }; }; v1v2_ldo6: ldo6 { regulator-name = "v1v2_ldo6"; regulator-min-microvolt = <1200000>; regulator-max-microvolt = <1200000>; regulator-always-on; standby-ddr-sr{ regulator-off-in-suspend; }; standby-ddr-off{ regulator-off-in-suspend; }; }; vref_ddr: vref_ddr { regulator-name = "vref_ddr"; regulator-always-on; regulator-over-current-protection; lp-stop{ regulator-on-in-suspend; }; standby-ddr-sr{ regulator-on-in-suspend; }; standby-ddr-off{ regulator-off-in-suspend; }; }; bst_out: boost { regulator-name = "bst_out"; }; vbus_otg: pwr_sw1 { regulator-name = "vbus_otg"; }; vbus_sw: pwr_sw2 { regulator-name = "vbus_sw"; regulator-active-discharge = <1>; }; }; }; }; &pwr_regulators { system_suspend_supported_soc_modes = < STM32_PM_CSLEEP_RUN STM32_PM_CSTOP_ALLOW_LP_STOP STM32_PM_CSTOP_ALLOW_STANDBY_DDR_SR >; system_off_soc_mode = ; vdd-supply = <&vdd>; vdd_3v3_usbfs-supply = <&vdd_usb>; }; /* eMMC */ &sdmmc2{ pinctrl-names = "default"; pinctrl-0 = <&sdmmc2_pins_mx>; bus-width = <8>; vmmc-supply = <&vdda>; vqmmc-supply = <&v3v3>; max-frequency = <150000000>; mmc-hs200-1_8v; status = "okay"; };We have verified the correct output voltages are there.
Power-up sequence stuck at uboot prompt STM32MP> after generating gollowing messages…
invalid MAC address in OTP 00:00:00:00:00:00
Net: No ethernet found.
Hit any key to stop autoboot: 0
STM32MP>
Would appreciate any help resolving this issue.
/Farid
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