lk2nd: fastboot: debug: Add command to dump SPMI regulator state

This allows reading which PMIC/SPMI regulators are enabled and which voltage they are configured with during boot. Example output for PM8916 on MSM8916: $ fastboot oem debug spmi-regulators (bootloader) Detected PMIC 0x2000b (bootloader) s1: 1012500 mV, enabled, normal (ult_lo_smps) (bootloader) s2: 1150000 mV, enabled, normal (ult_lo_smps) (bootloader) s3: 1250000 mV, enabled, normal (ult_lo_smps) (bootloader) s4: 2050000 mV, enabled, normal (ult_ho_smps) (bootloader) l1: 1287500 mV, disabled, normal (ult_nldo) (bootloader) l2: 1200000 mV, enabled, idle (ult_nldo) (bootloader) l3: 1150000 mV, enabled, idle (ult_nldo) (bootloader) l4: 2050000 mV, disabled, normal (ult_pldo) (bootloader) l5: 1800000 mV, enabled, idle (ult_pldo) (bootloader) l6: 1800000 mV, enabled, normal (ult_pldo) (bootloader) l7: 1800000 mV, enabled, idle (ult_pldo) (bootloader) l8: 2900000 mV, enabled, normal (ult_pldo) (bootloader) l9: 3300000 mV, disabled, normal (ult_pldo) (bootloader) l10: 2800000 mV, disabled, normal (ult_pldo) (bootloader) l11: 2950000 mV, enabled, normal (ult_pldo) (bootloader) l12: 2950000 mV, enabled, normal (ult_pldo) (bootloader) l13: 3075000 mV, enabled, normal (ult_pldo) (bootloader) l14: 1800000 mV, disabled, normal (ult_pldo) (bootloader) l15: 1800000 mV, disabled, normal (ult_pldo) (bootloader) l16: 1800000 mV, disabled, normal (ult_pldo) (bootloader) l17: 2850000 mV, enabled, normal (ult_pldo) (bootloader) l18: 2700000 mV, disabled, normal (ult_pldo)
juanesf · Sep 9, 2023 · ee60a2b · ee60a2b
1 parent f3cbd7e
commit ee60a2b
Show file tree

Hide file tree

Showing 2 changed files with 66 additions and 0 deletions.
diff --git a/lk2nd/fastboot/debug/regulator.c b/lk2nd/fastboot/debug/regulator.c
@@ -0,0 +1,58 @@
+// SPDX-License-Identifier: BSD-3-Clause
+/* Copyright (c) 2023, Stephan Gerhold <[email protected]> */
+
+#include <board.h>
+#include <fastboot.h>
+#include <printf.h>
+#include <stdint.h>
+
+#include <lk2nd/hw/regulator.h>
+#include <lk2nd/util/minmax.h>
+
+static const char * const regulator_state[] = {
+	"unknown", "disabled", "enabled",
+};
+
+static const char * const regulator_modes[] = {
+	"", ",   fast", ", normal", ",   idle"
+};
+
+static void dump_regulator(struct regulator_dev *rdev)
+{
+	char response[MAX_RSP_SIZE];
+
+	snprintf(response, sizeof(response),
+		 "%4s: %7d mV, %8s%s%s  (%s)",
+		 rdev->name,
+		 regulator_get_voltage(rdev),
+		 regulator_state[clamp(regulator_is_enabled(rdev), -1, 1) + 1],
+		 regulator_modes[regulator_get_mode(rdev)],
+		 regulator_is_bypassed(rdev) == 1 ? ", bypassed" : "",
+		 rdev->driver_type);
+	fastboot_info(response);
+}
+
+static void dump_regulators(struct regulator_dev *rdev)
+{
+	for (; rdev; rdev = rdev->next)
+		dump_regulator(rdev);
+}
+
+static void cmd_oem_debug_spmi_regulators(const char *arg, void *data, unsigned sz)
+{
+	char response[MAX_RSP_SIZE];
+	uint32_t target;
+	int i;
+
+	for (i = 0; i < MAX_PMIC_DEVICES; ++i) {
+		target = board_pmic_target(i);
+		if (!target)
+			break;
+
+		snprintf(response, sizeof(response), "Detected PMIC %#x", target);
+		fastboot_info(response);
+		dump_regulators(spmi_regulator_probe(target));
+	}
+	fastboot_okay("");
+}
+FASTBOOT_REGISTER("oem debug spmi-regulators", cmd_oem_debug_spmi_regulators);
diff --git a/lk2nd/fastboot/debug/rules.mk b/lk2nd/fastboot/debug/rules.mk
@@ -4,3 +4,11 @@ LOCAL_DIR := $(GET_LOCAL_DIR)
 OBJS += \
 	$(LOCAL_DIR)/cpuid.o \
 	$(LOCAL_DIR)/register.o \
+
+# Currently the regulator fastboot debug code is only used for SPMI regulators
+ifneq ($(filter dev/pmic/pm8x41, $(ALLMODULES)),)
+ifneq ($(BUILD_GPL),)
+MODULES += lk2nd/hw/regulator
+OBJS += $(LOCAL_DIR)/regulator.o
+endif
+endif