--- /dev/null
+/*
+ * Copyright (c) 2012-2015, The Linux Foundation. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 and
+ * only version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/module.h>
+#include <linux/delay.h>
+#include <linux/err.h>
+#include <linux/kernel.h>
+#include <linux/interrupt.h>
+#include <linux/bitops.h>
+#include <linux/slab.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+#include <linux/platform_device.h>
+#include <linux/ktime.h>
+#include <linux/regulator/driver.h>
+#include <linux/regmap.h>
+#include <linux/list.h>
+
+/* These types correspond to unique register layouts. */
+enum spmi_regulator_logical_type {
+ SPMI_REGULATOR_LOGICAL_TYPE_SMPS,
+ SPMI_REGULATOR_LOGICAL_TYPE_LDO,
+ SPMI_REGULATOR_LOGICAL_TYPE_VS,
+ SPMI_REGULATOR_LOGICAL_TYPE_BOOST,
+ SPMI_REGULATOR_LOGICAL_TYPE_FTSMPS,
+ SPMI_REGULATOR_LOGICAL_TYPE_BOOST_BYP,
+ SPMI_REGULATOR_LOGICAL_TYPE_LN_LDO,
+ SPMI_REGULATOR_LOGICAL_TYPE_ULT_LO_SMPS,
+ SPMI_REGULATOR_LOGICAL_TYPE_ULT_HO_SMPS,
+ SPMI_REGULATOR_LOGICAL_TYPE_ULT_LDO,
+};
+
+enum spmi_regulator_type {
+ SPMI_REGULATOR_TYPE_BUCK = 0x03,
+ SPMI_REGULATOR_TYPE_LDO = 0x04,
+ SPMI_REGULATOR_TYPE_VS = 0x05,
+ SPMI_REGULATOR_TYPE_BOOST = 0x1b,
+ SPMI_REGULATOR_TYPE_FTS = 0x1c,
+ SPMI_REGULATOR_TYPE_BOOST_BYP = 0x1f,
+ SPMI_REGULATOR_TYPE_ULT_LDO = 0x21,
+ SPMI_REGULATOR_TYPE_ULT_BUCK = 0x22,
+};
+
+enum spmi_regulator_subtype {
+ SPMI_REGULATOR_SUBTYPE_GP_CTL = 0x08,
+ SPMI_REGULATOR_SUBTYPE_RF_CTL = 0x09,
+ SPMI_REGULATOR_SUBTYPE_N50 = 0x01,
+ SPMI_REGULATOR_SUBTYPE_N150 = 0x02,
+ SPMI_REGULATOR_SUBTYPE_N300 = 0x03,
+ SPMI_REGULATOR_SUBTYPE_N600 = 0x04,
+ SPMI_REGULATOR_SUBTYPE_N1200 = 0x05,
+ SPMI_REGULATOR_SUBTYPE_N600_ST = 0x06,
+ SPMI_REGULATOR_SUBTYPE_N1200_ST = 0x07,
+ SPMI_REGULATOR_SUBTYPE_N900_ST = 0x14,
+ SPMI_REGULATOR_SUBTYPE_N300_ST = 0x15,
+ SPMI_REGULATOR_SUBTYPE_P50 = 0x08,
+ SPMI_REGULATOR_SUBTYPE_P150 = 0x09,
+ SPMI_REGULATOR_SUBTYPE_P300 = 0x0a,
+ SPMI_REGULATOR_SUBTYPE_P600 = 0x0b,
+ SPMI_REGULATOR_SUBTYPE_P1200 = 0x0c,
+ SPMI_REGULATOR_SUBTYPE_LN = 0x10,
+ SPMI_REGULATOR_SUBTYPE_LV_P50 = 0x28,
+ SPMI_REGULATOR_SUBTYPE_LV_P150 = 0x29,
+ SPMI_REGULATOR_SUBTYPE_LV_P300 = 0x2a,
+ SPMI_REGULATOR_SUBTYPE_LV_P600 = 0x2b,
+ SPMI_REGULATOR_SUBTYPE_LV_P1200 = 0x2c,
+ SPMI_REGULATOR_SUBTYPE_LV_P450 = 0x2d,
+ SPMI_REGULATOR_SUBTYPE_LV100 = 0x01,
+ SPMI_REGULATOR_SUBTYPE_LV300 = 0x02,
+ SPMI_REGULATOR_SUBTYPE_MV300 = 0x08,
+ SPMI_REGULATOR_SUBTYPE_MV500 = 0x09,
+ SPMI_REGULATOR_SUBTYPE_HDMI = 0x10,
+ SPMI_REGULATOR_SUBTYPE_OTG = 0x11,
+ SPMI_REGULATOR_SUBTYPE_5V_BOOST = 0x01,
+ SPMI_REGULATOR_SUBTYPE_FTS_CTL = 0x08,
+ SPMI_REGULATOR_SUBTYPE_FTS2p5_CTL = 0x09,
+ SPMI_REGULATOR_SUBTYPE_BB_2A = 0x01,
+ SPMI_REGULATOR_SUBTYPE_ULT_HF_CTL1 = 0x0d,
+ SPMI_REGULATOR_SUBTYPE_ULT_HF_CTL2 = 0x0e,
+ SPMI_REGULATOR_SUBTYPE_ULT_HF_CTL3 = 0x0f,
+ SPMI_REGULATOR_SUBTYPE_ULT_HF_CTL4 = 0x10,
+};
+
+enum spmi_common_regulator_registers {
+ SPMI_COMMON_REG_DIG_MAJOR_REV = 0x01,
+ SPMI_COMMON_REG_TYPE = 0x04,
+ SPMI_COMMON_REG_SUBTYPE = 0x05,
+ SPMI_COMMON_REG_VOLTAGE_RANGE = 0x40,
+ SPMI_COMMON_REG_VOLTAGE_SET = 0x41,
+ SPMI_COMMON_REG_MODE = 0x45,
+ SPMI_COMMON_REG_ENABLE = 0x46,
+ SPMI_COMMON_REG_PULL_DOWN = 0x48,
+ SPMI_COMMON_REG_SOFT_START = 0x4c,
+ SPMI_COMMON_REG_STEP_CTRL = 0x61,
+};
+
+enum spmi_vs_registers {
+ SPMI_VS_REG_OCP = 0x4a,
+ SPMI_VS_REG_SOFT_START = 0x4c,
+};
+
+enum spmi_boost_registers {
+ SPMI_BOOST_REG_CURRENT_LIMIT = 0x4a,
+};
+
+enum spmi_boost_byp_registers {
+ SPMI_BOOST_BYP_REG_CURRENT_LIMIT = 0x4b,
+};
+
+/* Used for indexing into ctrl_reg. These are offets from 0x40 */
+enum spmi_common_control_register_index {
+ SPMI_COMMON_IDX_VOLTAGE_RANGE = 0,
+ SPMI_COMMON_IDX_VOLTAGE_SET = 1,
+ SPMI_COMMON_IDX_MODE = 5,
+ SPMI_COMMON_IDX_ENABLE = 6,
+};
+
+/* Common regulator control register layout */
+#define SPMI_COMMON_ENABLE_MASK 0x80
+#define SPMI_COMMON_ENABLE 0x80
+#define SPMI_COMMON_DISABLE 0x00
+#define SPMI_COMMON_ENABLE_FOLLOW_HW_EN3_MASK 0x08
+#define SPMI_COMMON_ENABLE_FOLLOW_HW_EN2_MASK 0x04
+#define SPMI_COMMON_ENABLE_FOLLOW_HW_EN1_MASK 0x02
+#define SPMI_COMMON_ENABLE_FOLLOW_HW_EN0_MASK 0x01
+#define SPMI_COMMON_ENABLE_FOLLOW_ALL_MASK 0x0f
+
+/* Common regulator mode register layout */
+#define SPMI_COMMON_MODE_HPM_MASK 0x80
+#define SPMI_COMMON_MODE_AUTO_MASK 0x40
+#define SPMI_COMMON_MODE_BYPASS_MASK 0x20
+#define SPMI_COMMON_MODE_FOLLOW_AWAKE_MASK 0x10
+#define SPMI_COMMON_MODE_FOLLOW_HW_EN3_MASK 0x08
+#define SPMI_COMMON_MODE_FOLLOW_HW_EN2_MASK 0x04
+#define SPMI_COMMON_MODE_FOLLOW_HW_EN1_MASK 0x02
+#define SPMI_COMMON_MODE_FOLLOW_HW_EN0_MASK 0x01
+#define SPMI_COMMON_MODE_FOLLOW_ALL_MASK 0x1f
+
+/* Common regulator pull down control register layout */
+#define SPMI_COMMON_PULL_DOWN_ENABLE_MASK 0x80
+
+/* LDO regulator current limit control register layout */
+#define SPMI_LDO_CURRENT_LIMIT_ENABLE_MASK 0x80
+
+/* LDO regulator soft start control register layout */
+#define SPMI_LDO_SOFT_START_ENABLE_MASK 0x80
+
+/* VS regulator over current protection control register layout */
+#define SPMI_VS_OCP_OVERRIDE 0x01
+#define SPMI_VS_OCP_NO_OVERRIDE 0x00
+
+/* VS regulator soft start control register layout */
+#define SPMI_VS_SOFT_START_ENABLE_MASK 0x80
+#define SPMI_VS_SOFT_START_SEL_MASK 0x03
+
+/* Boost regulator current limit control register layout */
+#define SPMI_BOOST_CURRENT_LIMIT_ENABLE_MASK 0x80
+#define SPMI_BOOST_CURRENT_LIMIT_MASK 0x07
+
+#define SPMI_VS_OCP_DEFAULT_MAX_RETRIES 10
+#define SPMI_VS_OCP_DEFAULT_RETRY_DELAY_MS 30
+#define SPMI_VS_OCP_FALL_DELAY_US 90
+#define SPMI_VS_OCP_FAULT_DELAY_US 20000
+
+#define SPMI_FTSMPS_STEP_CTRL_STEP_MASK 0x18
+#define SPMI_FTSMPS_STEP_CTRL_STEP_SHIFT 3
+#define SPMI_FTSMPS_STEP_CTRL_DELAY_MASK 0x07
+#define SPMI_FTSMPS_STEP_CTRL_DELAY_SHIFT 0
+
+/* Clock rate in kHz of the FTSMPS regulator reference clock. */
+#define SPMI_FTSMPS_CLOCK_RATE 19200
+
+/* Minimum voltage stepper delay for each step. */
+#define SPMI_FTSMPS_STEP_DELAY 8
+
+/*
+ * The ratio SPMI_FTSMPS_STEP_MARGIN_NUM/SPMI_FTSMPS_STEP_MARGIN_DEN is used to
+ * adjust the step rate in order to account for oscillator variance.
+ */
+#define SPMI_FTSMPS_STEP_MARGIN_NUM 4
+#define SPMI_FTSMPS_STEP_MARGIN_DEN 5
+
+/*
+ * This voltage in uV is returned by get_voltage functions when there is no way
+ * to determine the current voltage level. It is needed because the regulator
+ * framework treats a 0 uV voltage as an error.
+ */
+#define VOLTAGE_UNKNOWN 1
+
+/* VSET value to decide the range of ULT SMPS */
+#define ULT_SMPS_RANGE_SPLIT 0x60
+
+/**
+ * struct spmi_voltage_range - regulator set point voltage mapping description
+ * @min_uV: Minimum programmable output voltage resulting from
+ * set point register value 0x00
+ * @max_uV: Maximum programmable output voltage
+ * @step_uV: Output voltage increase resulting from the set point
+ * register value increasing by 1
+ * @set_point_min_uV: Minimum allowed voltage
+ * @set_point_max_uV: Maximum allowed voltage. This may be tweaked in order
+ * to pick which range should be used in the case of
+ * overlapping set points.
+ * @n_voltages: Number of preferred voltage set points present in this
+ * range
+ * @range_sel: Voltage range register value corresponding to this range
+ *
+ * The following relationships must be true for the values used in this struct:
+ * (max_uV - min_uV) % step_uV == 0
+ * (set_point_min_uV - min_uV) % step_uV == 0*
+ * (set_point_max_uV - min_uV) % step_uV == 0*
+ * n_voltages = (set_point_max_uV - set_point_min_uV) / step_uV + 1
+ *
+ * *Note, set_point_min_uV == set_point_max_uV == 0 is allowed in order to
+ * specify that the voltage range has meaning, but is not preferred.
+ */
+struct spmi_voltage_range {
+ int min_uV;
+ int max_uV;
+ int step_uV;
+ int set_point_min_uV;
+ int set_point_max_uV;
+ unsigned n_voltages;
+ u8 range_sel;
+};
+
+/*
+ * The ranges specified in the spmi_voltage_set_points struct must be listed
+ * so that range[i].set_point_max_uV < range[i+1].set_point_min_uV.
+ */
+struct spmi_voltage_set_points {
+ struct spmi_voltage_range *range;
+ int count;
+ unsigned n_voltages;
+};
+
+struct spmi_regulator {
+ struct regulator_desc desc;
+ struct device *dev;
+ struct delayed_work ocp_work;
+ struct regmap *regmap;
+ struct spmi_voltage_set_points *set_points;
+ enum spmi_regulator_logical_type logical_type;
+ int ocp_irq;
+ int ocp_count;
+ int ocp_max_retries;
+ int ocp_retry_delay_ms;
+ int hpm_min_load;
+ int slew_rate;
+ ktime_t vs_enable_time;
+ u16 base;
+ struct list_head node;
+};
+
+struct spmi_regulator_mapping {
+ enum spmi_regulator_type type;
+ enum spmi_regulator_subtype subtype;
+ enum spmi_regulator_logical_type logical_type;
+ u32 revision_min;
+ u32 revision_max;
+ struct regulator_ops *ops;
+ struct spmi_voltage_set_points *set_points;
+ int hpm_min_load;
+};
+
+struct spmi_regulator_data {
+ const char *name;
+ u16 base;
+ const char *supply;
+ const char *ocp;
+ u16 force_type;
+};
+
+#define SPMI_VREG(_type, _subtype, _dig_major_min, _dig_major_max, \
+ _logical_type, _ops_val, _set_points_val, _hpm_min_load) \
+ { \
+ .type = SPMI_REGULATOR_TYPE_##_type, \
+ .subtype = SPMI_REGULATOR_SUBTYPE_##_subtype, \
+ .revision_min = _dig_major_min, \
+ .revision_max = _dig_major_max, \
+ .logical_type = SPMI_REGULATOR_LOGICAL_TYPE_##_logical_type, \
+ .ops = &spmi_##_ops_val##_ops, \
+ .set_points = &_set_points_val##_set_points, \
+ .hpm_min_load = _hpm_min_load, \
+ }
+
+#define SPMI_VREG_VS(_subtype, _dig_major_min, _dig_major_max) \
+ { \
+ .type = SPMI_REGULATOR_TYPE_VS, \
+ .subtype = SPMI_REGULATOR_SUBTYPE_##_subtype, \
+ .revision_min = _dig_major_min, \
+ .revision_max = _dig_major_max, \
+ .logical_type = SPMI_REGULATOR_LOGICAL_TYPE_VS, \
+ .ops = &spmi_vs_ops, \
+ }
+
+#define SPMI_VOLTAGE_RANGE(_range_sel, _min_uV, _set_point_min_uV, \
+ _set_point_max_uV, _max_uV, _step_uV) \
+ { \
+ .min_uV = _min_uV, \
+ .max_uV = _max_uV, \
+ .set_point_min_uV = _set_point_min_uV, \
+ .set_point_max_uV = _set_point_max_uV, \
+ .step_uV = _step_uV, \
+ .range_sel = _range_sel, \
+ }
+
+#define DEFINE_SPMI_SET_POINTS(name) \
+struct spmi_voltage_set_points name##_set_points = { \
+ .range = name##_ranges, \
+ .count = ARRAY_SIZE(name##_ranges), \
+}
+
+/*
+ * These tables contain the physically available PMIC regulator voltage setpoint
+ * ranges. Where two ranges overlap in hardware, one of the ranges is trimmed
+ * to ensure that the setpoints available to software are monotonically
+ * increasing and unique. The set_voltage callback functions expect these
+ * properties to hold.
+ */
+static struct spmi_voltage_range pldo_ranges[] = {
+ SPMI_VOLTAGE_RANGE(2, 750000, 750000, 1537500, 1537500, 12500),
+ SPMI_VOLTAGE_RANGE(3, 1500000, 1550000, 3075000, 3075000, 25000),
+ SPMI_VOLTAGE_RANGE(4, 1750000, 3100000, 4900000, 4900000, 50000),
+};
+
+static struct spmi_voltage_range nldo1_ranges[] = {
+ SPMI_VOLTAGE_RANGE(2, 750000, 750000, 1537500, 1537500, 12500),
+};
+
+static struct spmi_voltage_range nldo2_ranges[] = {
+ SPMI_VOLTAGE_RANGE(0, 375000, 0, 0, 1537500, 12500),
+ SPMI_VOLTAGE_RANGE(1, 375000, 375000, 768750, 768750, 6250),
+ SPMI_VOLTAGE_RANGE(2, 750000, 775000, 1537500, 1537500, 12500),
+};
+
+static struct spmi_voltage_range nldo3_ranges[] = {
+ SPMI_VOLTAGE_RANGE(0, 375000, 375000, 1537500, 1537500, 12500),
+ SPMI_VOLTAGE_RANGE(1, 375000, 0, 0, 1537500, 12500),
+ SPMI_VOLTAGE_RANGE(2, 750000, 0, 0, 1537500, 12500),
+};
+
+static struct spmi_voltage_range ln_ldo_ranges[] = {
+ SPMI_VOLTAGE_RANGE(1, 690000, 690000, 1110000, 1110000, 60000),
+ SPMI_VOLTAGE_RANGE(0, 1380000, 1380000, 2220000, 2220000, 120000),
+};
+
+static struct spmi_voltage_range smps_ranges[] = {
+ SPMI_VOLTAGE_RANGE(0, 375000, 375000, 1562500, 1562500, 12500),
+ SPMI_VOLTAGE_RANGE(1, 1550000, 1575000, 3125000, 3125000, 25000),
+};
+
+static struct spmi_voltage_range ftsmps_ranges[] = {
+ SPMI_VOLTAGE_RANGE(0, 0, 350000, 1275000, 1275000, 5000),
+ SPMI_VOLTAGE_RANGE(1, 0, 1280000, 2040000, 2040000, 10000),
+};
+
+static struct spmi_voltage_range ftsmps2p5_ranges[] = {
+ SPMI_VOLTAGE_RANGE(0, 80000, 350000, 1355000, 1355000, 5000),
+ SPMI_VOLTAGE_RANGE(1, 160000, 1360000, 2200000, 2200000, 10000),
+};
+
+static struct spmi_voltage_range boost_ranges[] = {
+ SPMI_VOLTAGE_RANGE(0, 4000000, 4000000, 5550000, 5550000, 50000),
+};
+
+static struct spmi_voltage_range boost_byp_ranges[] = {
+ SPMI_VOLTAGE_RANGE(0, 2500000, 2500000, 5200000, 5650000, 50000),
+};
+
+static struct spmi_voltage_range ult_lo_smps_ranges[] = {
+ SPMI_VOLTAGE_RANGE(0, 375000, 375000, 1562500, 1562500, 12500),
+ SPMI_VOLTAGE_RANGE(1, 750000, 0, 0, 1525000, 25000),
+};
+
+static struct spmi_voltage_range ult_ho_smps_ranges[] = {
+ SPMI_VOLTAGE_RANGE(0, 1550000, 1550000, 2325000, 2325000, 25000),
+};
+
+static struct spmi_voltage_range ult_nldo_ranges[] = {
+ SPMI_VOLTAGE_RANGE(0, 375000, 375000, 1537500, 1537500, 12500),
+};
+
+static struct spmi_voltage_range ult_pldo_ranges[] = {
+ SPMI_VOLTAGE_RANGE(0, 1750000, 1750000, 3337500, 3337500, 12500),
+};
+
+static DEFINE_SPMI_SET_POINTS(pldo);
+static DEFINE_SPMI_SET_POINTS(nldo1);
+static DEFINE_SPMI_SET_POINTS(nldo2);
+static DEFINE_SPMI_SET_POINTS(nldo3);
+static DEFINE_SPMI_SET_POINTS(ln_ldo);
+static DEFINE_SPMI_SET_POINTS(smps);
+static DEFINE_SPMI_SET_POINTS(ftsmps);
+static DEFINE_SPMI_SET_POINTS(ftsmps2p5);
+static DEFINE_SPMI_SET_POINTS(boost);
+static DEFINE_SPMI_SET_POINTS(boost_byp);
+static DEFINE_SPMI_SET_POINTS(ult_lo_smps);
+static DEFINE_SPMI_SET_POINTS(ult_ho_smps);
+static DEFINE_SPMI_SET_POINTS(ult_nldo);
+static DEFINE_SPMI_SET_POINTS(ult_pldo);
+
+static inline int spmi_vreg_read(struct spmi_regulator *vreg, u16 addr, u8 *buf,
+ int len)
+{
+ return regmap_bulk_read(vreg->regmap, vreg->base + addr, buf, len);
+}
+
+static inline int spmi_vreg_write(struct spmi_regulator *vreg, u16 addr,
+ u8 *buf, int len)
+{
+ return regmap_bulk_write(vreg->regmap, vreg->base + addr, buf, len);
+}
+
+static int spmi_vreg_update_bits(struct spmi_regulator *vreg, u16 addr, u8 val,
+ u8 mask)
+{
+ return regmap_update_bits(vreg->regmap, vreg->base + addr, mask, val);
+}
+
+static int spmi_regulator_common_is_enabled(struct regulator_dev *rdev)
+{
+ struct spmi_regulator *vreg = rdev_get_drvdata(rdev);
+ u8 reg;
+
+ spmi_vreg_read(vreg, SPMI_COMMON_REG_ENABLE, ®, 1);
+
+ return (reg & SPMI_COMMON_ENABLE_MASK) == SPMI_COMMON_ENABLE;
+}
+
+static int spmi_regulator_common_enable(struct regulator_dev *rdev)
+{
+ struct spmi_regulator *vreg = rdev_get_drvdata(rdev);
+
+ return spmi_vreg_update_bits(vreg, SPMI_COMMON_REG_ENABLE,
+ SPMI_COMMON_ENABLE, SPMI_COMMON_ENABLE_MASK);
+}
+
+static int spmi_regulator_vs_enable(struct regulator_dev *rdev)
+{
+ struct spmi_regulator *vreg = rdev_get_drvdata(rdev);
+
+ if (vreg->ocp_irq) {
+ vreg->ocp_count = 0;
+ vreg->vs_enable_time = ktime_get();
+ }
+
+ return spmi_regulator_common_enable(rdev);
+}
+
+static int spmi_regulator_common_disable(struct regulator_dev *rdev)
+{
+ struct spmi_regulator *vreg = rdev_get_drvdata(rdev);
+
+ return spmi_vreg_update_bits(vreg, SPMI_COMMON_REG_ENABLE,
+ SPMI_COMMON_DISABLE, SPMI_COMMON_ENABLE_MASK);
+}
+
+static int spmi_regulator_select_voltage(struct spmi_regulator *vreg,
+ int min_uV, int max_uV, u8 *range_sel, u8 *voltage_sel,
+ unsigned *selector)
+{
+ const struct spmi_voltage_range *range;
+ int uV = min_uV;
+ int lim_min_uV, lim_max_uV, i, range_id, range_max_uV;
+
+ /* Check if request voltage is outside of physically settable range. */
+ lim_min_uV = vreg->set_points->range[0].set_point_min_uV;
+ lim_max_uV =
+ vreg->set_points->range[vreg->set_points->count - 1].set_point_max_uV;
+
+ if (uV < lim_min_uV && max_uV >= lim_min_uV)
+ uV = lim_min_uV;
+
+ if (uV < lim_min_uV || uV > lim_max_uV) {
+ dev_err(vreg->dev,
+ "request v=[%d, %d] is outside possible v=[%d, %d]\n",
+ min_uV, max_uV, lim_min_uV, lim_max_uV);
+ return -EINVAL;
+ }
+
+ /* Find the range which uV is inside of. */
+ for (i = vreg->set_points->count - 1; i > 0; i--) {
+ range_max_uV = vreg->set_points->range[i - 1].set_point_max_uV;
+ if (uV > range_max_uV && range_max_uV > 0)
+ break;
+ }
+
+ range_id = i;
+ range = &vreg->set_points->range[range_id];
+ *range_sel = range->range_sel;
+
+ /*
+ * Force uV to be an allowed set point by applying a ceiling function to
+ * the uV value.
+ */
+ *voltage_sel = (uV - range->min_uV + range->step_uV - 1)
+ / range->step_uV;
+ uV = *voltage_sel * range->step_uV + range->min_uV;
+
+ if (uV > max_uV) {
+ dev_err(vreg->dev,
+ "request v=[%d, %d] cannot be met by any set point; "
+ "next set point: %d\n",
+ min_uV, max_uV, uV);
+ return -EINVAL;
+ }
+
+ *selector = 0;
+ for (i = 0; i < range_id; i++)
+ *selector += vreg->set_points->range[i].n_voltages;
+ *selector += (uV - range->set_point_min_uV) / range->step_uV;
+
+ return 0;
+}
+
+static const struct spmi_voltage_range *
+spmi_regulator_find_range(struct spmi_regulator *vreg)
+{
+ u8 range_sel;
+ const struct spmi_voltage_range *range, *end;
+
+ range = vreg->set_points->range;
+ end = range + vreg->set_points->count;
+
+ spmi_vreg_read(vreg, SPMI_COMMON_REG_VOLTAGE_RANGE, &range_sel, 1);
+
+ for (; range < end; range++)
+ if (range->range_sel == range_sel)
+ return range;
+
+ return NULL;
+}
+
+static int spmi_regulator_select_voltage_same_range(struct spmi_regulator *vreg,
+ int min_uV, int max_uV, u8 *range_sel, u8 *voltage_sel,
+ unsigned *selector)
+{
+ const struct spmi_voltage_range *range;
+ int uV = min_uV;
+ int i;
+
+ range = spmi_regulator_find_range(vreg);
+ if (!range)
+ goto different_range;
+
+ if (uV < range->min_uV && max_uV >= range->min_uV)
+ uV = range->min_uV;
+
+ if (uV < range->min_uV || uV > range->max_uV) {
+ /* Current range doesn't support the requested voltage. */
+ goto different_range;
+ }
+
+ /*
+ * Force uV to be an allowed set point by applying a ceiling function to
+ * the uV value.
+ */
+ *voltage_sel = DIV_ROUND_UP(uV - range->min_uV, range->step_uV);
+ uV = *voltage_sel * range->step_uV + range->min_uV;
+
+ if (uV > max_uV) {
+ /*
+ * No set point in the current voltage range is within the
+ * requested min_uV to max_uV range.
+ */
+ goto different_range;
+ }
+
+ *selector = 0;
+ for (i = 0; i < vreg->set_points->count; i++) {
+ if (uV >= vreg->set_points->range[i].set_point_min_uV
+ && uV <= vreg->set_points->range[i].set_point_max_uV)
+ *selector +=
+ (uV - vreg->set_points->range[i].set_point_min_uV)
+ / vreg->set_points->range[i].step_uV;
+ break;
+
+ *selector += vreg->set_points->range[i].n_voltages;
+ }
+
+ if (*selector >= vreg->set_points->n_voltages)
+ goto different_range;
+
+ return 0;
+
+different_range:
+ return spmi_regulator_select_voltage(vreg, min_uV, max_uV,
+ range_sel, voltage_sel, selector);
+}
+
+static int spmi_regulator_common_set_voltage(struct regulator_dev *rdev,
+ int min_uV, int max_uV, unsigned *selector)
+{
+ struct spmi_regulator *vreg = rdev_get_drvdata(rdev);
+ int ret;
+ u8 buf[2];
+ u8 range_sel, voltage_sel;
+
+ /*
+ * Favor staying in the current voltage range if possible. This avoids
+ * voltage spikes that occur when changing the voltage range.
+ */
+ ret = spmi_regulator_select_voltage_same_range(vreg, min_uV, max_uV,
+ &range_sel, &voltage_sel, selector);
+ if (ret)
+ return ret;
+
+ buf[0] = range_sel;
+ buf[1] = voltage_sel;
+ return spmi_vreg_write(vreg, SPMI_COMMON_REG_VOLTAGE_RANGE, buf, 2);
+}
+
+static int spmi_regulator_set_voltage_time_sel(struct regulator_dev *rdev,
+ unsigned int old_selector, unsigned int new_selector)
+{
+ struct spmi_regulator *vreg = rdev_get_drvdata(rdev);
+ const struct spmi_voltage_range *range;
+ int diff_uV;
+
+ range = spmi_regulator_find_range(vreg);
+ if (!range)
+ return -EINVAL;
+
+ diff_uV = abs(new_selector - old_selector) * range->step_uV;
+
+ return DIV_ROUND_UP(diff_uV, vreg->slew_rate);
+}
+
+static int spmi_regulator_common_get_voltage(struct regulator_dev *rdev)
+{
+ struct spmi_regulator *vreg = rdev_get_drvdata(rdev);
+ const struct spmi_voltage_range *range;
+ u8 voltage_sel;
+
+ spmi_vreg_read(vreg, SPMI_COMMON_REG_VOLTAGE_SET, &voltage_sel, 1);
+
+ range = spmi_regulator_find_range(vreg);
+ if (!range)
+ return VOLTAGE_UNKNOWN;
+
+ return range->step_uV * voltage_sel + range->min_uV;
+}
+
+static int spmi_regulator_single_range_set_voltage(struct regulator_dev *rdev,
+ int min_uV, int max_uV, unsigned *selector)
+{
+ struct spmi_regulator *vreg = rdev_get_drvdata(rdev);
+ int ret;
+ u8 range_sel, sel;
+
+ ret = spmi_regulator_select_voltage(vreg, min_uV, max_uV, &range_sel,
+ &sel, selector);
+ if (ret) {
+ dev_err(vreg->dev, "could not set voltage, ret=%d\n", ret);
+ return ret;
+ }
+
+ /*
+ * Certain types of regulators do not have a range select register so
+ * only voltage set register needs to be written.
+ */
+ return spmi_vreg_write(vreg, SPMI_COMMON_REG_VOLTAGE_SET, &sel, 1);
+}
+
+static int spmi_regulator_single_range_get_voltage(struct regulator_dev *rdev)
+{
+ struct spmi_regulator *vreg = rdev_get_drvdata(rdev);
+ const struct spmi_voltage_range *range = vreg->set_points->range;
+ u8 voltage_sel;
+
+ spmi_vreg_read(vreg, SPMI_COMMON_REG_VOLTAGE_SET, &voltage_sel, 1);
+
+ return range->step_uV * voltage_sel + range->min_uV;
+}
+
+static int spmi_regulator_ult_lo_smps_set_voltage(struct regulator_dev *rdev,
+ int min_uV, int max_uV, unsigned *selector)
+{
+ struct spmi_regulator *vreg = rdev_get_drvdata(rdev);
+ int ret;
+ u8 range_sel, voltage_sel;
+
+ /*
+ * Favor staying in the current voltage range if possible. This avoids
+ * voltage spikes that occur when changing the voltage range.
+ */
+ ret = spmi_regulator_select_voltage_same_range(vreg, min_uV, max_uV,
+ &range_sel, &voltage_sel, selector);
+ if (ret)
+ return ret;
+
+ /*
+ * Calculate VSET based on range
+ * In case of range 0: voltage_sel is a 7 bit value, can be written
+ * witout any modification.
+ * In case of range 1: voltage_sel is a 5 bit value, bits[7-5] set to
+ * [011].
+ */
+ if (range_sel == 1)
+ voltage_sel |= ULT_SMPS_RANGE_SPLIT;
+
+ ret = spmi_vreg_update_bits(vreg, SPMI_COMMON_REG_VOLTAGE_SET,
+ voltage_sel, 0xff);
+ if (ret)
+ return ret;
+
+ return 0;
+}
+
+static int spmi_regulator_ult_lo_smps_get_voltage(struct regulator_dev *rdev)
+{
+ struct spmi_regulator *vreg = rdev_get_drvdata(rdev);
+ const struct spmi_voltage_range *range;
+ u8 voltage_sel;
+
+ spmi_vreg_read(vreg, SPMI_COMMON_REG_VOLTAGE_SET, &voltage_sel, 1);
+
+ range = spmi_regulator_find_range(vreg);
+ if (!range)
+ return VOLTAGE_UNKNOWN;
+
+ if (range->range_sel == 1)
+ voltage_sel &= ~ULT_SMPS_RANGE_SPLIT;
+
+ return range->step_uV * voltage_sel + range->min_uV;
+}
+
+static int spmi_regulator_common_list_voltage(struct regulator_dev *rdev,
+ unsigned selector)
+{
+ struct spmi_regulator *vreg = rdev_get_drvdata(rdev);
+ int uV = 0;
+ int i;
+
+ if (selector >= vreg->set_points->n_voltages)
+ return 0;
+
+ for (i = 0; i < vreg->set_points->count; i++) {
+ if (selector < vreg->set_points->range[i].n_voltages)
+ uV = selector * vreg->set_points->range[i].step_uV
+ + vreg->set_points->range[i].set_point_min_uV;
+ break;
+
+ selector -= vreg->set_points->range[i].n_voltages;
+ }
+
+ return uV;
+}
+
+static int
+spmi_regulator_common_set_bypass(struct regulator_dev *rdev, bool enable)
+{
+ struct spmi_regulator *vreg = rdev_get_drvdata(rdev);
+ u8 mask = SPMI_COMMON_MODE_BYPASS_MASK;
+ u8 val = 0;
+
+ if (enable)
+ val = mask;
+
+ return spmi_vreg_update_bits(vreg, SPMI_COMMON_REG_MODE, val, mask);
+}
+
+static int
+spmi_regulator_common_get_bypass(struct regulator_dev *rdev, bool *enable)
+{
+ struct spmi_regulator *vreg = rdev_get_drvdata(rdev);
+ u8 val;
+ int ret;
+
+ ret = spmi_vreg_read(vreg, SPMI_COMMON_REG_MODE, &val, 1);
+ *enable = val & SPMI_COMMON_MODE_BYPASS_MASK;
+
+ return ret;
+}
+
+static unsigned int spmi_regulator_common_get_mode(struct regulator_dev *rdev)
+{
+ struct spmi_regulator *vreg = rdev_get_drvdata(rdev);
+ u8 reg;
+
+ spmi_vreg_read(vreg, SPMI_COMMON_REG_MODE, ®, 1);
+
+ if (reg & SPMI_COMMON_MODE_HPM_MASK)
+ return REGULATOR_MODE_NORMAL;
+
+ return REGULATOR_MODE_IDLE;
+}
+
+static int
+spmi_regulator_common_set_mode(struct regulator_dev *rdev, unsigned int mode)
+{
+ struct spmi_regulator *vreg = rdev_get_drvdata(rdev);
+ u8 mask = SPMI_COMMON_MODE_HPM_MASK;
+ u8 val = 0;
+
+ if (mode == REGULATOR_MODE_NORMAL)
+ val = mask;
+
+ return spmi_vreg_update_bits(vreg, SPMI_COMMON_REG_MODE, val, mask);
+}
+
+static int
+spmi_regulator_common_set_load(struct regulator_dev *rdev, int load_uA)
+{
+ struct spmi_regulator *vreg = rdev_get_drvdata(rdev);
+ unsigned int mode;
+
+ if (load_uA >= vreg->hpm_min_load)
+ mode = REGULATOR_MODE_NORMAL;
+ else
+ mode = REGULATOR_MODE_IDLE;
+
+ return spmi_regulator_common_set_mode(rdev, mode);
+}
+
+static int spmi_regulator_common_set_pull_down(struct regulator_dev *rdev)
+{
+ struct spmi_regulator *vreg = rdev_get_drvdata(rdev);
+ unsigned int mask = SPMI_COMMON_PULL_DOWN_ENABLE_MASK;
+
+ return spmi_vreg_update_bits(vreg, SPMI_COMMON_REG_PULL_DOWN,
+ mask, mask);
+}
+
+static int spmi_regulator_common_set_soft_start(struct regulator_dev *rdev)
+{
+ struct spmi_regulator *vreg = rdev_get_drvdata(rdev);
+ unsigned int mask = SPMI_LDO_SOFT_START_ENABLE_MASK;
+
+ return spmi_vreg_update_bits(vreg, SPMI_COMMON_REG_SOFT_START,
+ mask, mask);
+}
+
+static int spmi_regulator_set_ilim(struct regulator_dev *rdev, int ilim_uA)
+{
+ struct spmi_regulator *vreg = rdev_get_drvdata(rdev);
+ enum spmi_regulator_logical_type type = vreg->logical_type;
+ unsigned int current_reg;
+ u8 reg;
+ u8 mask = SPMI_BOOST_CURRENT_LIMIT_MASK |
+ SPMI_BOOST_CURRENT_LIMIT_ENABLE_MASK;
+ int max = (SPMI_BOOST_CURRENT_LIMIT_MASK + 1) * 500;
+
+ if (type == SPMI_REGULATOR_LOGICAL_TYPE_BOOST)
+ current_reg = SPMI_BOOST_REG_CURRENT_LIMIT;
+ else
+ current_reg = SPMI_BOOST_BYP_REG_CURRENT_LIMIT;
+
+ if (ilim_uA > max || ilim_uA <= 0)
+ return -EINVAL;
+
+ reg = (ilim_uA - 1) / 500;
+ reg |= SPMI_BOOST_CURRENT_LIMIT_ENABLE_MASK;
+
+ return spmi_vreg_update_bits(vreg, current_reg, reg, mask);
+}
+
+static int spmi_regulator_vs_clear_ocp(struct spmi_regulator *vreg)
+{
+ int ret;
+
+ ret = spmi_vreg_update_bits(vreg, SPMI_COMMON_REG_ENABLE,
+ SPMI_COMMON_DISABLE, SPMI_COMMON_ENABLE_MASK);
+
+ vreg->vs_enable_time = ktime_get();
+
+ ret = spmi_vreg_update_bits(vreg, SPMI_COMMON_REG_ENABLE,
+ SPMI_COMMON_ENABLE, SPMI_COMMON_ENABLE_MASK);
+
+ return ret;
+}
+
+static void spmi_regulator_vs_ocp_work(struct work_struct *work)
+{
+ struct delayed_work *dwork = to_delayed_work(work);
+ struct spmi_regulator *vreg
+ = container_of(dwork, struct spmi_regulator, ocp_work);
+
+ spmi_regulator_vs_clear_ocp(vreg);
+}
+
+static irqreturn_t spmi_regulator_vs_ocp_isr(int irq, void *data)
+{
+ struct spmi_regulator *vreg = data;
+ ktime_t ocp_irq_time;
+ s64 ocp_trigger_delay_us;
+
+ ocp_irq_time = ktime_get();
+ ocp_trigger_delay_us = ktime_us_delta(ocp_irq_time,
+ vreg->vs_enable_time);
+
+ /*
+ * Reset the OCP count if there is a large delay between switch enable
+ * and when OCP triggers. This is indicative of a hotplug event as
+ * opposed to a fault.
+ */
+ if (ocp_trigger_delay_us > SPMI_VS_OCP_FAULT_DELAY_US)
+ vreg->ocp_count = 0;
+
+ /* Wait for switch output to settle back to 0 V after OCP triggered. */
+ udelay(SPMI_VS_OCP_FALL_DELAY_US);
+
+ vreg->ocp_count++;
+
+ if (vreg->ocp_count == 1) {
+ /* Immediately clear the over current condition. */
+ spmi_regulator_vs_clear_ocp(vreg);
+ } else if (vreg->ocp_count <= vreg->ocp_max_retries) {
+ /* Schedule the over current clear task to run later. */
+ schedule_delayed_work(&vreg->ocp_work,
+ msecs_to_jiffies(vreg->ocp_retry_delay_ms) + 1);
+ } else {
+ dev_err(vreg->dev,
+ "OCP triggered %d times; no further retries\n",
+ vreg->ocp_count);
+ }
+
+ return IRQ_HANDLED;
+}
+
+static struct regulator_ops spmi_smps_ops = {
+ .enable = spmi_regulator_common_enable,
+ .disable = spmi_regulator_common_disable,
+ .is_enabled = spmi_regulator_common_is_enabled,
+ .set_voltage = spmi_regulator_common_set_voltage,
+ .get_voltage = spmi_regulator_common_get_voltage,
+ .list_voltage = spmi_regulator_common_list_voltage,
+ .set_mode = spmi_regulator_common_set_mode,
+ .get_mode = spmi_regulator_common_get_mode,
+ .set_load = spmi_regulator_common_set_load,
+ .set_pull_down = spmi_regulator_common_set_pull_down,
+};
+
+static struct regulator_ops spmi_ldo_ops = {
+ .enable = spmi_regulator_common_enable,
+ .disable = spmi_regulator_common_disable,
+ .is_enabled = spmi_regulator_common_is_enabled,
+ .set_voltage = spmi_regulator_common_set_voltage,
+ .get_voltage = spmi_regulator_common_get_voltage,
+ .list_voltage = spmi_regulator_common_list_voltage,
+ .set_mode = spmi_regulator_common_set_mode,
+ .get_mode = spmi_regulator_common_get_mode,
+ .set_load = spmi_regulator_common_set_load,
+ .set_bypass = spmi_regulator_common_set_bypass,
+ .get_bypass = spmi_regulator_common_get_bypass,
+ .set_pull_down = spmi_regulator_common_set_pull_down,
+ .set_soft_start = spmi_regulator_common_set_soft_start,
+};
+
+static struct regulator_ops spmi_ln_ldo_ops = {
+ .enable = spmi_regulator_common_enable,
+ .disable = spmi_regulator_common_disable,
+ .is_enabled = spmi_regulator_common_is_enabled,
+ .set_voltage = spmi_regulator_common_set_voltage,
+ .get_voltage = spmi_regulator_common_get_voltage,
+ .list_voltage = spmi_regulator_common_list_voltage,
+ .set_bypass = spmi_regulator_common_set_bypass,
+ .get_bypass = spmi_regulator_common_get_bypass,
+};
+
+static struct regulator_ops spmi_vs_ops = {
+ .enable = spmi_regulator_vs_enable,
+ .disable = spmi_regulator_common_disable,
+ .is_enabled = spmi_regulator_common_is_enabled,
+ .set_pull_down = spmi_regulator_common_set_pull_down,
+ .set_soft_start = spmi_regulator_common_set_soft_start,
+};
+
+static struct regulator_ops spmi_boost_ops = {
+ .enable = spmi_regulator_common_enable,
+ .disable = spmi_regulator_common_disable,
+ .is_enabled = spmi_regulator_common_is_enabled,
+ .set_voltage = spmi_regulator_single_range_set_voltage,
+ .get_voltage = spmi_regulator_single_range_get_voltage,
+ .list_voltage = spmi_regulator_common_list_voltage,
+ .set_input_current_limit = spmi_regulator_set_ilim,
+};
+
+static struct regulator_ops spmi_ftsmps_ops = {
+ .enable = spmi_regulator_common_enable,
+ .disable = spmi_regulator_common_disable,
+ .is_enabled = spmi_regulator_common_is_enabled,
+ .set_voltage = spmi_regulator_common_set_voltage,
+ .set_voltage_time_sel = spmi_regulator_set_voltage_time_sel,
+ .get_voltage = spmi_regulator_common_get_voltage,
+ .list_voltage = spmi_regulator_common_list_voltage,
+ .set_mode = spmi_regulator_common_set_mode,
+ .get_mode = spmi_regulator_common_get_mode,
+ .set_load = spmi_regulator_common_set_load,
+ .set_pull_down = spmi_regulator_common_set_pull_down,
+};
+
+static struct regulator_ops spmi_ult_lo_smps_ops = {
+ .enable = spmi_regulator_common_enable,
+ .disable = spmi_regulator_common_disable,
+ .is_enabled = spmi_regulator_common_is_enabled,
+ .set_voltage = spmi_regulator_ult_lo_smps_set_voltage,
+ .get_voltage = spmi_regulator_ult_lo_smps_get_voltage,
+ .list_voltage = spmi_regulator_common_list_voltage,
+ .set_mode = spmi_regulator_common_set_mode,
+ .get_mode = spmi_regulator_common_get_mode,
+ .set_load = spmi_regulator_common_set_load,
+ .set_pull_down = spmi_regulator_common_set_pull_down,
+};
+
+static struct regulator_ops spmi_ult_ho_smps_ops = {
+ .enable = spmi_regulator_common_enable,
+ .disable = spmi_regulator_common_disable,
+ .is_enabled = spmi_regulator_common_is_enabled,
+ .set_voltage = spmi_regulator_single_range_set_voltage,
+ .get_voltage = spmi_regulator_single_range_get_voltage,
+ .list_voltage = spmi_regulator_common_list_voltage,
+ .set_mode = spmi_regulator_common_set_mode,
+ .get_mode = spmi_regulator_common_get_mode,
+ .set_load = spmi_regulator_common_set_load,
+ .set_pull_down = spmi_regulator_common_set_pull_down,
+};
+
+static struct regulator_ops spmi_ult_ldo_ops = {
+ .enable = spmi_regulator_common_enable,
+ .disable = spmi_regulator_common_disable,
+ .is_enabled = spmi_regulator_common_is_enabled,
+ .set_voltage = spmi_regulator_single_range_set_voltage,
+ .get_voltage = spmi_regulator_single_range_get_voltage,
+ .list_voltage = spmi_regulator_common_list_voltage,
+ .set_mode = spmi_regulator_common_set_mode,
+ .get_mode = spmi_regulator_common_get_mode,
+ .set_load = spmi_regulator_common_set_load,
+ .set_bypass = spmi_regulator_common_set_bypass,
+ .get_bypass = spmi_regulator_common_get_bypass,
+ .set_pull_down = spmi_regulator_common_set_pull_down,
+ .set_soft_start = spmi_regulator_common_set_soft_start,
+};
+
+/* Maximum possible digital major revision value */
+#define INF 0xFF
+
+static const struct spmi_regulator_mapping supported_regulators[] = {
+ /* type subtype dig_min dig_max ltype ops setpoints hpm_min */
+ SPMI_VREG(BUCK, GP_CTL, 0, INF, SMPS, smps, smps, 100000),
+ SPMI_VREG(LDO, N300, 0, INF, LDO, ldo, nldo1, 10000),
+ SPMI_VREG(LDO, N600, 0, 0, LDO, ldo, nldo2, 10000),
+ SPMI_VREG(LDO, N1200, 0, 0, LDO, ldo, nldo2, 10000),
+ SPMI_VREG(LDO, N600, 1, INF, LDO, ldo, nldo3, 10000),
+ SPMI_VREG(LDO, N1200, 1, INF, LDO, ldo, nldo3, 10000),
+ SPMI_VREG(LDO, N600_ST, 0, 0, LDO, ldo, nldo2, 10000),
+ SPMI_VREG(LDO, N1200_ST, 0, 0, LDO, ldo, nldo2, 10000),
+ SPMI_VREG(LDO, N600_ST, 1, INF, LDO, ldo, nldo3, 10000),
+ SPMI_VREG(LDO, N1200_ST, 1, INF, LDO, ldo, nldo3, 10000),
+ SPMI_VREG(LDO, P50, 0, INF, LDO, ldo, pldo, 5000),
+ SPMI_VREG(LDO, P150, 0, INF, LDO, ldo, pldo, 10000),
+ SPMI_VREG(LDO, P300, 0, INF, LDO, ldo, pldo, 10000),
+ SPMI_VREG(LDO, P600, 0, INF, LDO, ldo, pldo, 10000),
+ SPMI_VREG(LDO, P1200, 0, INF, LDO, ldo, pldo, 10000),
+ SPMI_VREG(LDO, LN, 0, INF, LN_LDO, ln_ldo, ln_ldo, 0),
+ SPMI_VREG(LDO, LV_P50, 0, INF, LDO, ldo, pldo, 5000),
+ SPMI_VREG(LDO, LV_P150, 0, INF, LDO, ldo, pldo, 10000),
+ SPMI_VREG(LDO, LV_P300, 0, INF, LDO, ldo, pldo, 10000),
+ SPMI_VREG(LDO, LV_P600, 0, INF, LDO, ldo, pldo, 10000),
+ SPMI_VREG(LDO, LV_P1200, 0, INF, LDO, ldo, pldo, 10000),
+ SPMI_VREG_VS(LV100, 0, INF),
+ SPMI_VREG_VS(LV300, 0, INF),
+ SPMI_VREG_VS(MV300, 0, INF),
+ SPMI_VREG_VS(MV500, 0, INF),
+ SPMI_VREG_VS(HDMI, 0, INF),
+ SPMI_VREG_VS(OTG, 0, INF),
+ SPMI_VREG(BOOST, 5V_BOOST, 0, INF, BOOST, boost, boost, 0),
+ SPMI_VREG(FTS, FTS_CTL, 0, INF, FTSMPS, ftsmps, ftsmps, 100000),
+ SPMI_VREG(FTS, FTS2p5_CTL, 0, INF, FTSMPS, ftsmps, ftsmps2p5, 100000),
+ SPMI_VREG(BOOST_BYP, BB_2A, 0, INF, BOOST_BYP, boost, boost_byp, 0),
+ SPMI_VREG(ULT_BUCK, ULT_HF_CTL1, 0, INF, ULT_LO_SMPS, ult_lo_smps,
+ ult_lo_smps, 100000),
+ SPMI_VREG(ULT_BUCK, ULT_HF_CTL2, 0, INF, ULT_LO_SMPS, ult_lo_smps,
+ ult_lo_smps, 100000),
+ SPMI_VREG(ULT_BUCK, ULT_HF_CTL3, 0, INF, ULT_LO_SMPS, ult_lo_smps,
+ ult_lo_smps, 100000),
+ SPMI_VREG(ULT_BUCK, ULT_HF_CTL4, 0, INF, ULT_HO_SMPS, ult_ho_smps,
+ ult_ho_smps, 100000),
+ SPMI_VREG(ULT_LDO, N300_ST, 0, INF, ULT_LDO, ult_ldo, ult_nldo, 10000),
+ SPMI_VREG(ULT_LDO, N600_ST, 0, INF, ULT_LDO, ult_ldo, ult_nldo, 10000),
+ SPMI_VREG(ULT_LDO, N900_ST, 0, INF, ULT_LDO, ult_ldo, ult_nldo, 10000),
+ SPMI_VREG(ULT_LDO, N1200_ST, 0, INF, ULT_LDO, ult_ldo, ult_nldo, 10000),
+ SPMI_VREG(ULT_LDO, LV_P150, 0, INF, ULT_LDO, ult_ldo, ult_pldo, 10000),
+ SPMI_VREG(ULT_LDO, LV_P300, 0, INF, ULT_LDO, ult_ldo, ult_pldo, 10000),
+ SPMI_VREG(ULT_LDO, LV_P450, 0, INF, ULT_LDO, ult_ldo, ult_pldo, 10000),
+ SPMI_VREG(ULT_LDO, P600, 0, INF, ULT_LDO, ult_ldo, ult_pldo, 10000),
+ SPMI_VREG(ULT_LDO, P150, 0, INF, ULT_LDO, ult_ldo, ult_pldo, 10000),
+ SPMI_VREG(ULT_LDO, P50, 0, INF, ULT_LDO, ult_ldo, ult_pldo, 5000),
+};
+
+static void spmi_calculate_num_voltages(struct spmi_voltage_set_points *points)
+{
+ unsigned int n;
+ struct spmi_voltage_range *range = points->range;
+
+ for (; range < points->range + points->count; range++) {
+ n = 0;
+ if (range->set_point_max_uV) {
+ n = range->set_point_max_uV - range->set_point_min_uV;
+ n /= range->step_uV + 1;
+ }
+ range->n_voltages = n;
+ points->n_voltages += n;
+ }
+}
+
+static int spmi_regulator_match(struct spmi_regulator *vreg, u16 force_type)
+{
+ const struct spmi_regulator_mapping *mapping;
+ int ret, i;
+ u32 dig_major_rev;
+ u8 version[SPMI_COMMON_REG_SUBTYPE - SPMI_COMMON_REG_DIG_MAJOR_REV + 1];
+ u8 type, subtype;
+
+ ret = spmi_vreg_read(vreg, SPMI_COMMON_REG_DIG_MAJOR_REV, version,
+ ARRAY_SIZE(version));
+ if (ret) {
+ dev_err(vreg->dev, "could not read version registers\n");
+ return ret;
+ }
+ dig_major_rev = version[SPMI_COMMON_REG_DIG_MAJOR_REV
+ - SPMI_COMMON_REG_DIG_MAJOR_REV];
+ if (!force_type) {
+ type = version[SPMI_COMMON_REG_TYPE -
+ SPMI_COMMON_REG_DIG_MAJOR_REV];
+ subtype = version[SPMI_COMMON_REG_SUBTYPE -
+ SPMI_COMMON_REG_DIG_MAJOR_REV];
+ } else {
+ type = force_type >> 8;
+ subtype = force_type;
+ }
+
+ for (i = 0; i < ARRAY_SIZE(supported_regulators); i++) {
+ mapping = &supported_regulators[i];
+ if (mapping->type == type && mapping->subtype == subtype
+ && mapping->revision_min <= dig_major_rev
+ && mapping->revision_max >= dig_major_rev)
+ goto found;
+ }
+
+ dev_err(vreg->dev,
+ "unsupported regulator: name=%s type=0x%02X, subtype=0x%02X, dig major rev=0x%02X\n",
+ vreg->desc.name, type, subtype, dig_major_rev);
+
+ return -ENODEV;
+
+found:
+ vreg->logical_type = mapping->logical_type;
+ vreg->set_points = mapping->set_points;
+ vreg->hpm_min_load = mapping->hpm_min_load;
+ vreg->desc.ops = mapping->ops;
+
+ if (mapping->set_points) {
+ if (!mapping->set_points->n_voltages)
+ spmi_calculate_num_voltages(mapping->set_points);
+ vreg->desc.n_voltages = mapping->set_points->n_voltages;
+ }
+
+ return 0;
+}
+
+static int spmi_regulator_ftsmps_init_slew_rate(struct spmi_regulator *vreg)
+{
+ int ret;
+ u8 reg = 0;
+ int step, delay, slew_rate;
+ const struct spmi_voltage_range *range;
+
+ ret = spmi_vreg_read(vreg, SPMI_COMMON_REG_STEP_CTRL, ®, 1);
+ if (ret) {
+ dev_err(vreg->dev, "spmi read failed, ret=%d\n", ret);
+ return ret;
+ }
+
+ range = spmi_regulator_find_range(vreg);
+ if (!range)
+ return -EINVAL;
+
+ step = reg & SPMI_FTSMPS_STEP_CTRL_STEP_MASK;
+ step >>= SPMI_FTSMPS_STEP_CTRL_STEP_SHIFT;
+
+ delay = reg & SPMI_FTSMPS_STEP_CTRL_DELAY_MASK;
+ delay >>= SPMI_FTSMPS_STEP_CTRL_DELAY_SHIFT;
+
+ /* slew_rate has units of uV/us */
+ slew_rate = SPMI_FTSMPS_CLOCK_RATE * range->step_uV * (1 << step);
+ slew_rate /= 1000 * (SPMI_FTSMPS_STEP_DELAY << delay);
+ slew_rate *= SPMI_FTSMPS_STEP_MARGIN_NUM;
+ slew_rate /= SPMI_FTSMPS_STEP_MARGIN_DEN;
+
+ /* Ensure that the slew rate is greater than 0 */
+ vreg->slew_rate = max(slew_rate, 1);
+
+ return ret;
+}
+
+static unsigned int spmi_regulator_of_map_mode(unsigned int mode)
+{
+ if (mode)
+ return REGULATOR_MODE_NORMAL;
+
+ return REGULATOR_MODE_IDLE;
+}
+
+static int spmi_regulator_of_parse(struct device_node *node,
+ const struct regulator_desc *desc,
+ struct regulator_config *config)
+{
+ struct spmi_regulator *vreg = config->driver_data;
+ struct device *dev = config->dev;
+ int ret;
+
+ vreg->ocp_max_retries = SPMI_VS_OCP_DEFAULT_MAX_RETRIES;
+ vreg->ocp_retry_delay_ms = SPMI_VS_OCP_DEFAULT_RETRY_DELAY_MS;
+
+ if (vreg->logical_type == SPMI_REGULATOR_LOGICAL_TYPE_FTSMPS) {
+ ret = spmi_regulator_ftsmps_init_slew_rate(vreg);
+ if (ret)
+ return ret;
+ }
+
+ if (vreg->logical_type != SPMI_REGULATOR_LOGICAL_TYPE_VS)
+ vreg->ocp_irq = 0;
+
+ if (vreg->ocp_irq) {
+ ret = devm_request_irq(dev, vreg->ocp_irq,
+ spmi_regulator_vs_ocp_isr, IRQF_TRIGGER_RISING, "ocp",
+ vreg);
+ if (ret < 0) {
+ dev_err(dev, "failed to request irq %d, ret=%d\n",
+ vreg->ocp_irq, ret);
+ return ret;
+ }
+
+ INIT_DELAYED_WORK(&vreg->ocp_work, spmi_regulator_vs_ocp_work);
+ }
+
+ return 0;
+}
+
+static const struct spmi_regulator_data pm8941_regulators[] = {
+ { "s1", 0x1400, "vdd_s1", },
+ { "s2", 0x1700, "vdd_s2", },
+ { "s3", 0x1a00, "vdd_s3", },
+ { "l1", 0x4000, "vdd_l1_l3", },
+ { "l2", 0x4100, "vdd_l2_lvs_1_2_3", },
+ { "l3", 0x4200, "vdd_l1_l3", },
+ { "l4", 0x4300, "vdd_l4_l11", },
+ { "l5", 0x4400, "vdd_l5_l7", NULL, 0x0410 },
+ { "l6", 0x4500, "vdd_l6_l12_l14_l15", },
+ { "l7", 0x4600, "vdd_l5_l7", NULL, 0x0410 },
+ { "l8", 0x4700, "vdd_l8_l16_l18_19", },
+ { "l9", 0x4800, "vdd_l9_l10_l17_l22", },
+ { "l10", 0x4900, "vdd_l9_l10_l17_l22", },
+ { "l11", 0x4a00, "vdd_l4_l11", },
+ { "l12", 0x4b00, "vdd_l6_l12_l14_l15", },
+ { "l13", 0x4c00, "vdd_l13_l20_l23_l24", },
+ { "l14", 0x4d00, "vdd_l6_l12_l14_l15", },
+ { "l15", 0x4e00, "vdd_l6_l12_l14_l15", },
+ { "l16", 0x4f00, "vdd_l8_l16_l18_19", },
+ { "l17", 0x5000, "vdd_l9_l10_l17_l22", },
+ { "l18", 0x5100, "vdd_l8_l16_l18_19", },
+ { "l19", 0x5200, "vdd_l8_l16_l18_19", },
+ { "l20", 0x5300, "vdd_l13_l20_l23_l24", },
+ { "l21", 0x5400, "vdd_l21", },
+ { "l22", 0x5500, "vdd_l9_l10_l17_l22", },
+ { "l23", 0x5600, "vdd_l13_l20_l23_l24", },
+ { "l24", 0x5700, "vdd_l13_l20_l23_l24", },
+ { "lvs1", 0x8000, "vdd_l2_lvs_1_2_3", },
+ { "lvs2", 0x8100, "vdd_l2_lvs_1_2_3", },
+ { "lvs3", 0x8200, "vdd_l2_lvs_1_2_3", },
+ { "mvs1", 0x8300, "vin_5vs", },
+ { "mvs2", 0x8400, "vin_5vs", },
+ { }
+};
+
+static const struct spmi_regulator_data pm8841_regulators[] = {
+ { "s1", 0x1400, "vdd_s1", },
+ { "s2", 0x1700, "vdd_s2", NULL, 0x1c08 },
+ { "s3", 0x1a00, "vdd_s3", },
+ { "s4", 0x1d00, "vdd_s4", NULL, 0x1c08 },
+ { "s5", 0x2000, "vdd_s5", NULL, 0x1c08 },
+ { "s6", 0x2300, "vdd_s6", NULL, 0x1c08 },
+ { "s7", 0x2600, "vdd_s7", NULL, 0x1c08 },
+ { "s8", 0x2900, "vdd_s8", NULL, 0x1c08 },
+ { }
+};
+
+static const struct spmi_regulator_data pm8916_regulators[] = {
+ { "s1", 0x1400, "vdd_s1", },
+ { "s2", 0x1700, "vdd_s2", },
+ { "s3", 0x1a00, "vdd_s3", },
+ { "s4", 0x1d00, "vdd_s4", },
+ { "l1", 0x4000, "vdd_l1_l3", },
+ { "l2", 0x4100, "vdd_l2", },
+ { "l3", 0x4200, "vdd_l1_l3", },
+ { "l4", 0x4300, "vdd_l4_l5_l6", },
+ { "l5", 0x4400, "vdd_l4_l5_l6", },
+ { "l6", 0x4500, "vdd_l4_l5_l6", },
+ { "l7", 0x4600, "vdd_l7", },
+ { "l8", 0x4700, "vdd_l8_l11_l14_l15_l16", },
+ { "l9", 0x4800, "vdd_l9_l10_l12_l13_l17_l18", },
+ { "l10", 0x4900, "vdd_l9_l10_l12_l13_l17_l18", },
+ { "l11", 0x4a00, "vdd_l8_l11_l14_l15_l16", },
+ { "l12", 0x4b00, "vdd_l9_l10_l12_l13_l17_l18", },
+ { "l13", 0x4c00, "vdd_l9_l10_l12_l13_l17_l18", },
+ { "l14", 0x4d00, "vdd_l8_l11_l14_l15_l16", },
+ { "l15", 0x4e00, "vdd_l8_l11_l14_l15_l16", },
+ { "l16", 0x4f00, "vdd_l8_l11_l14_l15_l16", },
+ { "l17", 0x5000, "vdd_l9_l10_l12_l13_l17_l18", },
+ { "l18", 0x5100, "vdd_l9_l10_l12_l13_l17_l18", },
+ { }
+};
+
+static const struct of_device_id qcom_spmi_regulator_match[] = {
+ { .compatible = "qcom,pm8841-regulators", .data = &pm8841_regulators },
+ { .compatible = "qcom,pm8916-regulators", .data = &pm8916_regulators },
+ { .compatible = "qcom,pm8941-regulators", .data = &pm8941_regulators },
+ { }
+};
+MODULE_DEVICE_TABLE(of, qcom_spmi_regulator_match);
+
+static int qcom_spmi_regulator_probe(struct platform_device *pdev)
+{
+ const struct spmi_regulator_data *reg;
+ const struct of_device_id *match;
+ struct regulator_config config = { };
+ struct regulator_dev *rdev;
+ struct spmi_regulator *vreg;
+ struct regmap *regmap;
+ const char *name;
+ struct device *dev = &pdev->dev;
+ int ret;
+ struct list_head *vreg_list;
+
+ vreg_list = devm_kzalloc(dev, sizeof(*vreg_list), GFP_KERNEL);
+ if (!vreg_list)
+ return -ENOMEM;
+ INIT_LIST_HEAD(vreg_list);
+ platform_set_drvdata(pdev, vreg_list);
+
+ regmap = dev_get_regmap(dev->parent, NULL);
+ if (!regmap)
+ return -ENODEV;
+
+ match = of_match_device(qcom_spmi_regulator_match, &pdev->dev);
+ if (!match)
+ return -ENODEV;
+
+ for (reg = match->data; reg->name; reg++) {
+ vreg = devm_kzalloc(dev, sizeof(*vreg), GFP_KERNEL);
+ if (!vreg)
+ return -ENOMEM;
+
+ vreg->dev = dev;
+ vreg->base = reg->base;
+ vreg->regmap = regmap;
+
+ if (reg->ocp) {
+ vreg->ocp_irq = platform_get_irq_byname(pdev, reg->ocp);
+ if (vreg->ocp_irq < 0) {
+ ret = vreg->ocp_irq;
+ goto err;
+ }
+ }
+
+ vreg->desc.id = -1;
+ vreg->desc.owner = THIS_MODULE;
+ vreg->desc.type = REGULATOR_VOLTAGE;
+ vreg->desc.name = name = reg->name;
+ vreg->desc.supply_name = reg->supply;
+ vreg->desc.of_match = reg->name;
+ vreg->desc.of_parse_cb = spmi_regulator_of_parse;
+ vreg->desc.of_map_mode = spmi_regulator_of_map_mode;
+
+ ret = spmi_regulator_match(vreg, reg->force_type);
+ if (ret)
+ goto err;
+
+ config.dev = dev;
+ config.driver_data = vreg;
+ rdev = devm_regulator_register(dev, &vreg->desc, &config);
+ if (IS_ERR(rdev)) {
+ dev_err(dev, "failed to register %s\n", name);
+ ret = PTR_ERR(rdev);
+ goto err;
+ }
+
+ INIT_LIST_HEAD(&vreg->node);
+ list_add(&vreg->node, vreg_list);
+ }
+
+ return 0;
+
+err:
+ list_for_each_entry(vreg, vreg_list, node)
+ if (vreg->ocp_irq)
+ cancel_delayed_work_sync(&vreg->ocp_work);
+ return ret;
+}
+
+static int qcom_spmi_regulator_remove(struct platform_device *pdev)
+{
+ struct spmi_regulator *vreg;
+ struct list_head *vreg_list = platform_get_drvdata(pdev);
+
+ list_for_each_entry(vreg, vreg_list, node)
+ if (vreg->ocp_irq)
+ cancel_delayed_work_sync(&vreg->ocp_work);
+
+ return 0;
+}
+
+static struct platform_driver qcom_spmi_regulator_driver = {
+ .driver = {
+ .name = "qcom-spmi-regulator",
+ .of_match_table = qcom_spmi_regulator_match,
+ },
+ .probe = qcom_spmi_regulator_probe,
+ .remove = qcom_spmi_regulator_remove,
+};
+module_platform_driver(qcom_spmi_regulator_driver);
+
+MODULE_DESCRIPTION("Qualcomm SPMI PMIC regulator driver");
+MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("platform:qcom-spmi-regulator");
projects / linux-drm-fsl-dcu.git / commitdiff