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@@ -0,0 +1,355 @@
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+/*
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+ * Copyright (C) 2015 Samsung Electronics
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+ * Przemyslaw Marczak <p.marczak@samsung.com>
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+ *
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+ * SPDX-License-Identifier: GPL-2.0+
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+ */
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+
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+#include <common.h>
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+#include <fdtdec.h>
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+#include <errno.h>
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+#include <dm.h>
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+#include <i2c.h>
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+#include <power/pmic.h>
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+#include <power/regulator.h>
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+#include <power/sandbox_pmic.h>
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+
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+DECLARE_GLOBAL_DATA_PTR;
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+
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+#define MODE(_id, _val, _name) [_id] = { \
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+ .id = _id, \
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+ .register_value = _val, \
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+ .name = _name, \
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+}
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+
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+#define RANGE(_min, _max, _step) { \
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+ .min = _min, \
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+ .max = _max, \
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+ .step = _step, \
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+}
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+
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+/*
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+ * struct output_range - helper structure type to define the range of output
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+ * operating values (current/voltage), limited by the PMIC IC design.
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+ *
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+ * @min - minimum value
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+ * @max - maximum value
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+ * @step - step value
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+*/
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+struct output_range {
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+ int min;
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+ int max;
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+ int step;
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+};
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+
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+/* BUCK: 1,2 - voltage range */
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+static struct output_range buck_voltage_range[] = {
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+ RANGE(OUT_BUCK1_UV_MIN, OUT_BUCK1_UV_MAX, OUT_BUCK1_UV_STEP),
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+ RANGE(OUT_BUCK2_UV_MIN, OUT_BUCK2_UV_MAX, OUT_BUCK2_UV_STEP),
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+};
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+
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+/* BUCK: 1 - current range */
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+static struct output_range buck_current_range[] = {
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+ RANGE(OUT_BUCK1_UA_MIN, OUT_BUCK1_UA_MAX, OUT_BUCK1_UA_STEP),
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+};
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+
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+/* BUCK operating modes */
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+static struct dm_regulator_mode sandbox_buck_modes[] = {
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+ MODE(BUCK_OM_OFF, OM2REG(BUCK_OM_OFF), "OFF"),
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+ MODE(BUCK_OM_ON, OM2REG(BUCK_OM_ON), "ON"),
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+ MODE(BUCK_OM_PWM, OM2REG(BUCK_OM_PWM), "PWM"),
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+};
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+
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+/* LDO: 1,2 - voltage range */
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+static struct output_range ldo_voltage_range[] = {
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+ RANGE(OUT_LDO1_UV_MIN, OUT_LDO1_UV_MAX, OUT_LDO1_UV_STEP),
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+ RANGE(OUT_LDO2_UV_MIN, OUT_LDO2_UV_MAX, OUT_LDO2_UV_STEP),
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+};
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+
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+/* LDO: 1 - current range */
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+static struct output_range ldo_current_range[] = {
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+ RANGE(OUT_LDO1_UA_MIN, OUT_LDO1_UA_MAX, OUT_LDO1_UA_STEP),
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+};
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+
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+/* LDO operating modes */
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+static struct dm_regulator_mode sandbox_ldo_modes[] = {
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+ MODE(LDO_OM_OFF, OM2REG(LDO_OM_OFF), "OFF"),
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+ MODE(LDO_OM_ON, OM2REG(LDO_OM_ON), "ON"),
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+ MODE(LDO_OM_SLEEP, OM2REG(LDO_OM_SLEEP), "SLEEP"),
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+ MODE(LDO_OM_STANDBY, OM2REG(LDO_OM_STANDBY), "STANDBY"),
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+};
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+
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+int out_get_value(struct udevice *dev, int output_count, int reg_type,
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+ struct output_range *range)
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+{
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+ uint8_t reg_val;
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+ uint reg;
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+ int ret;
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+
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+ if (dev->driver_data > output_count) {
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+ error("Unknown regulator number: %lu for PMIC %s!",
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+ dev->driver_data, dev->name);
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+ return -EINVAL;
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+ }
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+
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+ reg = (dev->driver_data - 1) * OUT_REG_COUNT + reg_type;
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+ ret = pmic_read(dev->parent, reg, ®_val, 1);
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+ if (ret) {
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+ error("PMIC read failed: %d\n", ret);
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+ return ret;
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+ }
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+
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+ ret = REG2VAL(range[dev->driver_data - 1].min,
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+ range[dev->driver_data - 1].step,
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+ reg_val);
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+
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+ return ret;
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+}
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+
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+static int out_set_value(struct udevice *dev, int output_count, int reg_type,
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+ struct output_range *range, int value)
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+{
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+ uint8_t reg_val;
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+ uint reg;
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+ int ret;
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+ int max_value;
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+
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+ if (dev->driver_data > output_count) {
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+ error("Unknown regulator number: %lu for PMIC %s!",
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+ dev->driver_data, dev->name);
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+ return -EINVAL;
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+ }
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+
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+ max_value = range[dev->driver_data - 1].max;
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+ if (value > max_value) {
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+ error("Wrong value for %s: %lu. Max is: %d.",
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+ dev->name, dev->driver_data, max_value);
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+ return -EINVAL;
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+ }
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+
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+ reg_val = VAL2REG(range[dev->driver_data - 1].min,
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+ range[dev->driver_data - 1].step,
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+ value);
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+
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+ reg = (dev->driver_data - 1) * OUT_REG_COUNT + reg_type;
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+ ret = pmic_write(dev->parent, reg, ®_val, 1);
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+ if (ret) {
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+ error("PMIC write failed: %d\n", ret);
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+ return ret;
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+ }
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+
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+ return 0;
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+}
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+
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+static int out_get_mode(struct udevice *dev)
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+{
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+ struct dm_regulator_uclass_platdata *uc_pdata;
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+ uint8_t reg_val;
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+ uint reg;
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+ int ret;
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+ int i;
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+
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+ uc_pdata = dev_get_uclass_platdata(dev);
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+
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+ reg = (dev->driver_data - 1) * OUT_REG_COUNT + OUT_REG_OM;
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+ ret = pmic_read(dev->parent, reg, ®_val, 1);
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+ if (ret) {
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+ error("PMIC read failed: %d\n", ret);
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+ return ret;
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+ }
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+
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+ for (i = 0; i < uc_pdata->mode_count; i++) {
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+ if (reg_val == uc_pdata->mode[i].register_value)
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+ return uc_pdata->mode[i].id;
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+ }
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+
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+ error("Unknown operation mode for %s!", dev->name);
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+ return -EINVAL;
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+}
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+
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+static int out_set_mode(struct udevice *dev, int mode)
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+{
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+ struct dm_regulator_uclass_platdata *uc_pdata;
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+ int reg_val = -1;
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+ uint reg;
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+ int ret;
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+ int i;
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+
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+ uc_pdata = dev_get_uclass_platdata(dev);
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+
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+ if (mode >= uc_pdata->mode_count)
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+ return -EINVAL;
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+
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+ for (i = 0; i < uc_pdata->mode_count; i++) {
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+ if (mode == uc_pdata->mode[i].id) {
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+ reg_val = uc_pdata->mode[i].register_value;
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+ break;
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+ }
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+ }
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+
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+ if (reg_val == -1) {
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+ error("Unknown operation mode for %s!", dev->name);
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+ return -EINVAL;
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+ }
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+
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+ reg = (dev->driver_data - 1) * OUT_REG_COUNT + OUT_REG_OM;
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+ ret = pmic_write(dev->parent, reg, (uint8_t *)®_val, 1);
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+ if (ret) {
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+ error("PMIC write failed: %d\n", ret);
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+ return ret;
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+ }
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+
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+ return 0;
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+}
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+
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+static int buck_get_voltage(struct udevice *dev)
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+{
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+ return out_get_value(dev, SANDBOX_BUCK_COUNT, OUT_REG_UV,
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+ buck_voltage_range);
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+}
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+
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+static int buck_set_voltage(struct udevice *dev, int uV)
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+{
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+ return out_set_value(dev, SANDBOX_BUCK_COUNT, OUT_REG_UV,
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+ buck_voltage_range, uV);
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+}
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+
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+static int buck_get_current(struct udevice *dev)
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+{
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+ /* BUCK2 - unsupported */
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+ if (dev->driver_data == 2)
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+ return -ENOSYS;
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+
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+ return out_get_value(dev, SANDBOX_BUCK_COUNT, OUT_REG_UA,
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+ buck_current_range);
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+}
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+
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+static int buck_set_current(struct udevice *dev, int uA)
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+{
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+ /* BUCK2 - unsupported */
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+ if (dev->driver_data == 2)
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+ return -ENOSYS;
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+
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+ return out_set_value(dev, SANDBOX_BUCK_COUNT, OUT_REG_UA,
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+ buck_current_range, uA);
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+}
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+
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+static bool buck_get_enable(struct udevice *dev)
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+{
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+ if (out_get_mode(dev) == BUCK_OM_OFF)
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+ return false;
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+
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+ return true;
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+}
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+
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+static int buck_set_enable(struct udevice *dev, bool enable)
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+{
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+ return out_set_mode(dev, enable ? BUCK_OM_ON : BUCK_OM_OFF);
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+}
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+
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+static int sandbox_buck_probe(struct udevice *dev)
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+{
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+ struct dm_regulator_uclass_platdata *uc_pdata;
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+
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+ uc_pdata = dev_get_uclass_platdata(dev);
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+
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+ uc_pdata->type = REGULATOR_TYPE_BUCK;
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+ uc_pdata->mode = sandbox_buck_modes;
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+ uc_pdata->mode_count = ARRAY_SIZE(sandbox_buck_modes);
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+
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+ return 0;
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+}
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+
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+static const struct dm_regulator_ops sandbox_buck_ops = {
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+ .get_value = buck_get_voltage,
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+ .set_value = buck_set_voltage,
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+ .get_current = buck_get_current,
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+ .set_current = buck_set_current,
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+ .get_enable = buck_get_enable,
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+ .set_enable = buck_set_enable,
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+ .get_mode = out_get_mode,
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+ .set_mode = out_set_mode,
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+};
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+
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+U_BOOT_DRIVER(sandbox_buck) = {
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+ .name = SANDBOX_BUCK_DRIVER,
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+ .id = UCLASS_REGULATOR,
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+ .ops = &sandbox_buck_ops,
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+ .probe = sandbox_buck_probe,
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+};
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+
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+static int ldo_get_voltage(struct udevice *dev)
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+{
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+ return out_get_value(dev, SANDBOX_LDO_COUNT, OUT_REG_UV,
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+ ldo_voltage_range);
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+}
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+
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+static int ldo_set_voltage(struct udevice *dev, int uV)
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+{
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+ return out_set_value(dev, SANDBOX_LDO_COUNT, OUT_REG_UV,
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+ ldo_voltage_range, uV);
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+}
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+
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+static int ldo_get_current(struct udevice *dev)
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+{
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+ /* LDO2 - unsupported */
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+ if (dev->driver_data == 2)
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+ return -ENOSYS;
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+
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+ return out_get_value(dev, SANDBOX_LDO_COUNT, OUT_REG_UA,
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+ ldo_current_range);
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+}
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+
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+static int ldo_set_current(struct udevice *dev, int uA)
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+{
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+ /* LDO2 - unsupported */
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+ if (dev->driver_data == 2)
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+ return -ENOSYS;
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+
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+ return out_set_value(dev, SANDBOX_LDO_COUNT, OUT_REG_UA,
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+ ldo_current_range, uA);
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+}
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+
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+static bool ldo_get_enable(struct udevice *dev)
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+{
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+ if (out_get_mode(dev) == LDO_OM_OFF)
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+ return false;
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+
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+ return true;
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+}
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+
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+static int ldo_set_enable(struct udevice *dev, bool enable)
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+{
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+ return out_set_mode(dev, enable ? LDO_OM_ON : LDO_OM_OFF);
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+}
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+
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+static int sandbox_ldo_probe(struct udevice *dev)
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+{
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+ struct dm_regulator_uclass_platdata *uc_pdata;
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+
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+ uc_pdata = dev_get_uclass_platdata(dev);
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+
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+ uc_pdata->type = REGULATOR_TYPE_LDO;
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+ uc_pdata->mode = sandbox_ldo_modes;
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+ uc_pdata->mode_count = ARRAY_SIZE(sandbox_ldo_modes);
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+
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+ return 0;
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+}
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+
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+static const struct dm_regulator_ops sandbox_ldo_ops = {
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+ .get_value = ldo_get_voltage,
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+ .set_value = ldo_set_voltage,
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+ .get_current = ldo_get_current,
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+ .set_current = ldo_set_current,
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+ .get_enable = ldo_get_enable,
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+ .set_enable = ldo_set_enable,
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+ .get_mode = out_get_mode,
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+ .set_mode = out_set_mode,
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+};
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+
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+U_BOOT_DRIVER(sandbox_ldo) = {
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+ .name = SANDBOX_LDO_DRIVER,
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+ .id = UCLASS_REGULATOR,
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+ .ops = &sandbox_ldo_ops,
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+ .probe = sandbox_ldo_probe,
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+};
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