Reuses the shared pmbus_print_telemetry() / pmbus_print_status_word() helpers, for the 48V->12V Flex PSU reports.
The PSU is a carrier device: its DT node compatible = "pmbus", regulator-name = "psu-48v", pmbus,num-pages = <2> sits behind the carrier SMBus mux tree, described with the I2C buses later in this series. Until then no generic PMBus regulator is bound and the hook prints nothing. Signed-off-by: Vincent Jardin <[email protected]> --- board/nxp/lx2160a/nbxv3/Makefile | 1 + board/nxp/lx2160a/nbxv3/psu_pmbus.c | 80 +++++++++++++++++++++++++++++ 2 files changed, 81 insertions(+) create mode 100644 board/nxp/lx2160a/nbxv3/psu_pmbus.c diff --git a/board/nxp/lx2160a/nbxv3/Makefile b/board/nxp/lx2160a/nbxv3/Makefile index e4aa5309804..24874138833 100644 --- a/board/nxp/lx2160a/nbxv3/Makefile +++ b/board/nxp/lx2160a/nbxv3/Makefile @@ -4,3 +4,4 @@ obj-y += eth_nbxv3.o obj-y += mps_pmbus.o +obj-y += psu_pmbus.o diff --git a/board/nxp/lx2160a/nbxv3/psu_pmbus.c b/board/nxp/lx2160a/nbxv3/psu_pmbus.c new file mode 100644 index 00000000000..33cd0b1f5ed --- /dev/null +++ b/board/nxp/lx2160a/nbxv3/psu_pmbus.c @@ -0,0 +1,80 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Copyright 2026 Free Mobile - Vincent Jardin + * + * Nodebox v3 boot-time snapshot of the carrier PMBus PSU(s). + * + * Companion to mps_pmbus.c, which snapshots the on-module MPS MPQ8646 + * core regulator (+0V8_VDD) at boot. + * + * This file covers the other class of PMBus device the board carries: + * spec-compliant PSU bricks with no per-chip driver, bound to the generic + * `pmbus_generic_regulator` (compatible = "pmbus"). + * + * On nbxv3 that is the Flex 48 V -> 12 V PSU. + */ + +#include <dm.h> +#include <event.h> +#include <i2c.h> +#include <pmbus.h> +#include <dm/uclass.h> +#include <power/regulator.h> + +#define NBXV3_GENERIC_PMBUS_DRIVER "pmbus_generic_regulator" + +static void nbxv3_psu_snapshot_one(struct udevice *reg) +{ + struct udevice *parent = dev_get_parent(reg); + struct udevice *chip; + int bus_seq, addr; + const struct pmbus_active_dev *act; + + if (!parent || device_get_uclass_id(parent) != UCLASS_I2C) + return; + bus_seq = dev_seq(parent); + addr = dev_read_addr(reg); + if (addr < 0 || addr > 0x7f) + return; + + /* Select the device: caches MFR_* + reuses the generic info. */ + if (pmbus_set_active(bus_seq, (u8)addr)) + return; + act = pmbus_active(); + if (!act) + return; + if (pmbus_active_get_i2c(&chip)) + return; + + printf("PMBus PSU @ i2c%d:0x%02x", act->bus_seq, act->addr); + if (act->name[0]) + printf(" rail=\"%s\"", act->name); + if (act->mfr_id[0]) + printf(" MFR_ID=\"%s\"", act->mfr_id); + if (act->mfr_model[0]) + printf(" MODEL=\"%s\"", act->mfr_model); + printf("\n"); + + pmbus_print_telemetry(chip); + + pmbus_print_status_word(chip); +} + +static int nbxv3_psu_pmbus_last_stage_init(void) +{ + struct udevice *reg; + struct uclass *uc; + + if (uclass_get(UCLASS_REGULATOR, &uc)) + return 0; + + uclass_foreach_dev(reg, uc) { + if (!reg->driver || !reg->driver->name) + continue; + if (strcmp(reg->driver->name, NBXV3_GENERIC_PMBUS_DRIVER)) + continue; + nbxv3_psu_snapshot_one(reg); + } + return 0; +} +EVENT_SPY_SIMPLE(EVT_LAST_STAGE_INIT, nbxv3_psu_pmbus_last_stage_init); -- 2.43.0
