Other Parts Discussed in Thread: TPS65218
Hi,
I am trying to access the third I2C bus of an AM4372-based design within u-boot. The issue however is not specific to our custom-board, I am having the same problem with the EVM.
The bus is working fine from Linux. The pinmux settings are the same for for both, Linux and u-boot:
i2c2_pins: i2c2_pins {
pinctrl-single,pins = <
0x9e8 (PIN_INPUT_PULLUP | SLEWCTRL_FAST | MUX_MODE3)
0x9ec (PIN_INPUT_PULLUP | SLEWCTRL_FAST | MUX_MODE3)
>;
};
&i2c2 {
u-boot,dm-spl;
status = "okay";
pinctrl-names = "default";
pinctrl-0 = <&i2c2_pins>;
clock-frequency = <100000>;
tps65218: tps65218@24 {
reg = <0x24>;
compatible = "ti,tps65218";
interrupts = <GIC_SPI 7 IRQ_TYPE_NONE>;
interrupt-controller;
#interrupt-cells = <2>;
dcdc1: regulator-dcdc1 {
compatible = "ti,tps65218-dcdc1";
regulator-name = "vdd_core";
regulator-min-microvolt = <912000>;
regulator-max-microvolt = <1144000>;
regulator-boot-on;
regulator-always-on;
};
dcdc2: regulator-dcdc2 {
compatible = "ti,tps65218-dcdc2";
regulator-name = "vdd_mpu";
regulator-min-microvolt = <912000>;
regulator-max-microvolt = <1378000>;
regulator-boot-on;
regulator-always-on;
};
dcdc3: regulator-dcdc3 {
compatible = "ti,tps65218-dcdc3";
regulator-name = "vdcdc3";
regulator-min-microvolt = <1350000>;
regulator-max-microvolt = <1350000>;
regulator-boot-on;
regulator-always-on;
};
dcdc4: regulator-dcdc4 {
compatible = "ti,tps65218-dcdc4";
regulator-name = "vdcdc4";
regulator-min-microvolt = <3300000>;
regulator-max-microvolt = <3300000>;
regulator-boot-on;
regulator-always-on;
};
dcdc5: regulator-dcdc5 {
compatible = "ti,tps65218-dcdc5";
regulator-name = "v1_0bat";
regulator-min-microvolt = <1000000>;
regulator-max-microvolt = <1000000>;
regulator-boot-on;
regulator-always-on;
};
dcdc6: regulator-dcdc6 {
compatible = "ti,tps65218-dcdc6";
regulator-name = "v1_8bat";
regulator-min-microvolt = <1800000>;
regulator-max-microvolt = <1800000>;
regulator-boot-on;
regulator-always-on;
};
ldo1: regulator-ldo1 {
compatible = "ti,tps65218-ldo1";
regulator-min-microvolt = <2100000>;
regulator-max-microvolt = <2100000>;
regulator-boot-on;
regulator-always-on;
};
};
};
And in mux.c:
static struct module_pin_mux i2c2_pin_mux[] = {
{OFFSET(cam1_data0), (MODE(3) | PULLUP_EN | RXACTIVE | SLEWCTRL)},
{OFFSET(cam1_data1), (MODE(3) | PULLUP_EN | RXACTIVE | SLEWCTRL)},
{-1},
};
I have been trying with both, I2C_DM and plain access using the respective init functions, however the problem is always the same: trying to access the bus - for example using "i2c dev 2" in the u-boot prompt, will cause a reboot:
=> i2c bus Bus 2: i2c@4819c000 => i2c dev No I2C bus selected Current bus is -1 => i2c dev 2 Setting bus to 2 data abort pc : [<9ff70682>] lr : [<9ff70657>] reloc pc : [<80820682>] lr : [<80820657>] sp : 9df32c08 ip : 9df32bdc fp : 000003e8 r10: 9df41500 r9 : 9df3feb8 r8 : 9df415a8 r7 : 00000002 r6 : 00000001 r5 : 9ffab869 r4 : 4819c000 r3 : 000000a4 r2 : 0000b2b0 r1 : 00005578 r0 : 9df40468 Flags: nzCv IRQs off FIQs off Mode SVC_32 Code: 2e002702 461dbf18 7b7af44f 6004f8c8 (5ae37a6b) Resetting CPU ...
I have followed the various tweaks from the E2E articles like checking if I2C_BASE3 is defined. changing default base as define, (in case of no DM) put the right bus number in the init command, ... Nothing works.
Did anyone ever succeed in accessing I2C2 of AM437x via u-boot and if yes, how? I am really running out of ideas. As it is working perfectly fine in Linux, we can exclude any hardware or pinmux issues.
This is the output of u-boot (with driver debug enabled):
<debug_uart> spl_early_init uclass_find_device_by_seq: 0 -1 uclass_find_device_by_seq: 0 0 - -1 -1 'root_driver' - not found ofnode_read_bool: u-boot,dm-pre-reloc: false ofnode_read_bool: u-boot,dm-spl: true ofnode_read_u32_array: ranges: ofnode_read_bool: u-boot,dm-pre-reloc: false ofnode_read_bool: u-boot,dm-spl: true ofnode_read_u32_array: ranges: ofnode_read_bool: u-boot,dm-pre-reloc: false ofnode_read_bool: u-boot,dm-spl: true ofnode_read_u32_array: ranges: ofnode_read_bool: u-boot,dm-pre-reloc: false ofnode_read_bool: u-boot,dm-spl: true ofnode_read_bool: u-boot,dm-pre-reloc: false ofnode_read_bool: u-boot,dm-spl: true ofnode_read_bool: u-boot,dm-pre-reloc: false ofnode_read_bool: u-boot,dm-spl: true ofnode_read_bool: u-boot,dm-pre-reloc: false ofnode_read_bool: u-boot,dm-spl: true ofnode_read_bool: u-boot,dm-pre-reloc: false ofnode_read_bool: u-boot,dm-spl: true ofnode_read_bool: u-boot,dm-pre-reloc: false ofnode_read_bool: u-boot,dm-spl: true ofnode_read_bool: u-boot,dm-pre-reloc: false ofnode_read_bool: u-boot,dm-spl: true ofnode_read_u32_array: ranges: ofnode_read_bool: u-boot,dm-pre-reloc: false ofnode_read_bool: u-boot,dm-spl: true board_early_init_f prcm_init i2c2_pin_mux power_tps65218_init i2c_get_chip_for_busnum startuclass_find_device_by_seq: 0 0 - 2 -1 'i2c@4819c000' - not found uclass_find_device_by_seq: 1 0 - 2 -1 'i2c@4819c000' - not found Cannot find I2C bus 0 power_tps65218_init: -19 set_mux_conf_regs TPS reg: 1A value: 0 err: -19 TPS reg: 16 value: 0 err: -19 TPS reg: 17 value: 0 err: -19 TPS reg: 18 value: 0 err: -19 TPS reg: 19 value: 0 err: -19 TPS reg: 13 value: 0 err: -19 TPS reg: 1B value: 0 err: -19 TPS reg: 22 value: 0 err: -19 TPS reg: 13 value: 0 err: -19 TPS reg: 24 value: 0 err: -19 TPS reg: 25 value: 0 err: -19 TPS reg: 26 value: 0 err: -19 mmc0_pin_mux mmc1_pin_mux enable_board_pin_mux end sdram_init reg: 61a05332 get_ram_size ram size: 536870912 uclass_find_device_by_seq: 0 -1 uclass_find_device_by_seq: 0 0 - -1 -1 'ocp' - -1 -1 'l4_wkup@44c00000' - -1 -1 'scm@210000' - -1 -1 'ocp2scp@483a8000' - not found uclass_find_device_by_seq: 0 4 - 4 -1 'serial@481a8000' - not found ofnode_read_u32: reg-offset: (not found) ofnode_read_u32: clock-frequency: (not found) U-Boot SPL 2019.01-g11ba6979b2-dirty (Jan 04 2022 - 19:43:07 +0100) Trying to boot from MMC1 uclass_find_device_by_seq: 0 0 - -1 -1 'mmc@48060000' - -1 -1 'mmc@481d8000' - not found uclass_find_device_by_seq: 1 0 - -1 -1 'mmc@48060000' - -1 -1 'mmc@481d8000' - not found uclass_find_device_by_seq: 0 -1 uclass_find_device_by_seq: 0 0 - -1 -1 'mmc@48060000' - -1 -1 'mmc@481d8000' - not found ofnode_read_u32: bus-width: 0x4 (4) ofnode_read_u32: max-frequency: (not found) ofnode_read_bool: cap-sd-highspeed: false ofnode_read_bool: cap-mmc-highspeed: false ofnode_read_bool: sd-uhs-sdr12: false ofnode_read_bool: sd-uhs-sdr25: false ofnode_read_bool: sd-uhs-sdr50: false ofnode_read_bool: sd-uhs-sdr104: false ofnode_read_bool: sd-uhs-ddr50: false ofnode_read_bool: mmc-ddr-1_8v: false ofnode_read_bool: mmc-ddr-1_2v: false ofnode_read_bool: mmc-hs200-1_8v: false ofnode_read_bool: mmc-hs200-1_2v: false ofnode_read_bool: mmc-hs400-1_8v: false ofnode_read_bool: mmc-hs400-1_2v: false uclass_find_device_by_seq: 0 -1 uclass_find_device_by_seq: 0 0 - -1 0 'mmc@48060000' - found uclass_find_device_by_seq: 0 1 - -1 0 'mmc@48060000' - -1 -1 'mmc@481d8000' - not found ofnode_read_u32: bus-width: 0x8 (8) ofnode_read_u32: max-frequency: (not found) ofnode_read_bool: cap-sd-highspeed: false ofnode_read_bool: cap-mmc-highspeed: false ofnode_read_bool: sd-uhs-sdr12: false ofnode_read_bool: sd-uhs-sdr25: false ofnode_read_bool: sd-uhs-sdr50: false ofnode_read_bool: sd-uhs-sdr104: false ofnode_read_bool: sd-uhs-ddr50: false ofnode_read_bool: mmc-ddr-1_8v: false ofnode_read_bool: mmc-ddr-1_2v: false ofnode_read_bool: mmc-hs200-1_8v: false ofnode_read_bool: mmc-hs200-1_2v: false ofnode_read_bool: mmc-hs400-1_8v: false ofnode_read_bool: mmc-hs400-1_2v: false SPL: Please implement spl_start_uboot() for your board SPL: Direct Linux boot not active! uclass_find_device_by_seq: 0 -1 uclass_find_device_by_seq: 0 0 - -1 -1 'root_driver' - not found ofnode_read_bool: u-boot,dm-pre-reloc: false ofnode_read_bool: u-boot,dm-spl: true ofnode_read_u32_array: ranges: ofnode_read_bool: u-boot,dm-pre-reloc: false ofnode_read_bool: u-boot,dm-spl: true ofnode_read_u32_array: ranges: ofnode_read_bool: u-boot,dm-pre-reloc: false ofnode_read_bool: u-boot,dm-spl: true ofnode_read_u32_array: ranges: ofnode_read_bool: u-boot,dm-pre-reloc: false ofnode_read_bool: u-boot,dm-spl: true ofnode_read_bool: u-boot,dm-pre-reloc: false ofnode_read_bool: u-boot,dm-spl: true ofnode_read_bool: u-boot,dm-pre-reloc: false ofnode_read_bool: u-boot,dm-spl: false ofnode_read_bool: u-boot,dm-tpl: false ofnode_read_bool: u-boot,dm-pre-reloc: false ofnode_read_bool: u-boot,dm-spl: false ofnode_read_bool: u-boot,dm-tpl: false ofnode_read_bool: u-boot,dm-pre-reloc: false ofnode_read_bool: u-boot,dm-spl: true ofnode_read_bool: u-boot,dm-pre-reloc: false ofnode_read_bool: u-boot,dm-spl: true ofnode_read_bool: u-boot,dm-pre-reloc: false ofnode_read_bool: u-boot,dm-spl: true ofnode_read_bool: u-boot,dm-pre-reloc: false ofnode_read_bool: u-boot,dm-spl: true ofnode_read_bool: u-boot,dm-pre-reloc: false ofnode_read_bool: u-boot,dm-spl: false ofnode_read_bool: u-boot,dm-tpl: false ofnode_read_bool: u-boot,dm-pre-reloc: false ofnode_read_bool: u-boot,dm-spl: true ofnode_read_u32_array: ranges: ofnode_read_bool: u-boot,dm-pre-reloc: false ofnode_read_bool: u-boot,dm-spl: false ofnode_read_bool: u-boot,dm-tpl: false ofnode_read_bool: u-boot,dm-pre-reloc: false ofnode_read_bool: u-boot,dm-spl: true ofnode_read_bool: u-boot,dm-pre-reloc: false ofnode_read_bool: u-boot,dm-spl: false ofnode_read_bool: u-boot,dm-tpl: false ofnode_read_bool: u-boot,dm-pre-reloc: false ofnode_read_bool: u-boot,dm-spl: false ofnode_read_bool: u-boot,dm-tpl: false uclass_find_device_by_seq: 0 -1 uclass_find_device_by_seq: 0 0 - -1 -1 'ocp' - -1 -1 'l4_wkup@44c00000' - -1 -1 'scm@210000' - -1 -1 'ocp2scp@483a8000' - not found uclass_find_device_by_seq: 0 4 - 4 -1 'serial@481a8000' - not found ofnode_read_u32: reg-offset: (not found) ofnode_read_u32: clock-frequency: (not found) U-Boot 2019.01-g11ba6979b2-dirty (Jan 04 2022 - 19:43:07 +0100) CPU : AM437X-GP rev 1.2 Model: SMaBiT SMaWay DRAM: 512 MiB uclass_find_device_by_seq: 0 -1 uclass_find_device_by_seq: 0 0 - -1 -1 'root_driver' - not found ofnode_read_u32_array: ranges: ofnode_read_u32_array: ranges: ofnode_read_u32_array: ranges: ofnode_read_u32_array: ranges: ofnode_read_u32_array: ranges: uclass_find_device_by_seq: 0 -1 uclass_find_device_by_seq: 0 0 - -1 -1 'ocp' - -1 -1 'l4_wkup@44c00000' - -1 -1 'scm@210000' - -1 -1 'ocp2scp@483a8000' - -1 -1 'ocp2scp@483e8000' - not found uclass_find_device_by_seq: 0 4 - 4 -1 'serial@481a8000' - not found ofnode_read_u32: reg-offset: (not found) ofnode_read_u32: clock-frequency: (not found) i2c_get_chip_for_busnum startuclass_find_device_by_seq: 0 0 - 1 -1 'i2c@4802a000' - 2 -1 'i2c@4819c000' - not found uclass_find_device_by_seq: 1 0 - 1 -1 'i2c@4802a000' - 2 -1 'i2c@4819c000' - not found Cannot find I2C bus 0 power_tps65218_init: -19 NAND: ofnode_read_string: tick-timer: /ocp/timer@48040000 uclass_find_device_by_seq: 0 -1 uclass_find_device_by_seq: 0 0 - -1 -1 'timer@48040000' - not found ofnode_read_u32: clock-frequency: (not found) 0 MiB MMC: uclass_find_device_by_seq: 0 0 - -1 -1 'mmc@48060000' - -1 -1 'mmc@481d8000' - not found uclass_find_device_by_seq: 1 0 - -1 -1 'mmc@48060000' - -1 -1 'mmc@481d8000' - not found uclass_find_device_by_seq: 0 -1 uclass_find_device_by_seq: 0 0 - -1 -1 'mmc@48060000' - -1 -1 'mmc@481d8000' - not found ofnode_read_u32: bus-width: 0x4 (4) ofnode_read_u32: max-frequency: (not found) ofnode_read_bool: cap-sd-highspeed: false ofnode_read_bool: cap-mmc-highspeed: false ofnode_read_bool: sd-uhs-sdr12: false ofnode_read_bool: sd-uhs-sdr25: false ofnode_read_bool: sd-uhs-sdr50: false ofnode_read_bool: sd-uhs-sdr104: false ofnode_read_bool: sd-uhs-ddr50: false ofnode_read_bool: mmc-ddr-1_8v: false ofnode_read_bool: mmc-ddr-1_2v: false ofnode_read_bool: mmc-hs200-1_8v: false ofnode_read_bool: mmc-hs200-1_2v: false ofnode_read_bool: mmc-hs400-1_8v: false ofnode_read_bool: mmc-hs400-1_2v: false uclass_find_device_by_seq: 0 -1 uclass_find_device_by_seq: 0 0 - -1 0 'mmc@48060000' - found uclass_find_device_by_seq: 0 1 - -1 0 'mmc@48060000' - -1 -1 'mmc@481d8000' - not found ofnode_read_u32: bus-width: 0x8 (8) ofnode_read_u32: max-frequency: (not found) ofnode_read_bool: cap-sd-highspeed: false ofnode_read_bool: cap-mmc-highspeed: false ofnode_read_bool: sd-uhs-sdr12: false ofnode_read_bool: sd-uhs-sdr25: false ofnode_read_bool: sd-uhs-sdr50: false ofnode_read_bool: sd-uhs-sdr104: false ofnode_read_bool: sd-uhs-ddr50: false ofnode_read_bool: mmc-ddr-1_8v: false ofnode_read_bool: mmc-ddr-1_2v: false ofnode_read_bool: mmc-hs200-1_8v: false ofnode_read_bool: mmc-hs200-1_2v: false ofnode_read_bool: mmc-hs400-1_8v: false ofnode_read_bool: mmc-hs400-1_2v: false OMAP SD/MMC: 0, OMAP SD/MMC: 1 Loading Environment from FAT... uclass_find_device_by_seq: 0 -1 uclass_find_device_by_seq: 0 0 - -1 -1 'mmc@48060000.blk' - -1 -1 'mmc@481d8000.blk' - not found *** Warning - bad CRC, using default environment uclass_find_device_by_seq: 0 -1 uclass_find_device_by_seq: 0 0 - -1 -1 'oscillator' - not found ofnode_read_u32: clock-frequency: 0xb71b00 (12000000) Net: No ethernet found.
Thank you in advance for your ideas, regards
Peter
