| /* |
| * Copyright (c) 2015-2016, 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. |
| */ |
| |
| #define pr_fmt(fmt) "%s: " fmt, __func__ |
| |
| #include <linux/bitops.h> |
| #include <linux/debugfs.h> |
| #include <linux/err.h> |
| #include <linux/init.h> |
| #include <linux/interrupt.h> |
| #include <linux/io.h> |
| #include <linux/kernel.h> |
| #include <linux/list.h> |
| #include <linux/module.h> |
| #include <linux/of.h> |
| #include <linux/of_device.h> |
| #include <linux/platform_device.h> |
| #include <linux/pm_opp.h> |
| #include <linux/slab.h> |
| #include <linux/string.h> |
| #include <linux/uaccess.h> |
| #include <linux/regulator/driver.h> |
| #include <linux/regulator/machine.h> |
| #include <linux/regulator/of_regulator.h> |
| |
| #include "cpr3-regulator.h" |
| |
| #define MSM8996_MMSS_FUSE_CORNERS 4 |
| |
| /** |
| * struct cpr3_msm8996_mmss_fuses - MMSS specific fuse data for MSM8996 |
| * @init_voltage: Initial (i.e. open-loop) voltage fuse parameter value |
| * for each fuse corner (raw, not converted to a voltage) |
| * @offset_voltage: The closed-loop voltage margin adjustment fuse parameter |
| * value for each fuse corner (raw, not converted to a |
| * voltage) |
| * @speed_bin: Graphics processor speed bin fuse parameter value for |
| * the given chip |
| * @cpr_fusing_rev: CPR fusing revision fuse parameter value |
| * @limitation: CPR limitation select fuse parameter value |
| * @aging_init_quot_diff: Initial quotient difference between CPR aging |
| * min and max sensors measured at time of manufacturing |
| * |
| * This struct holds the values for all of the fuses read from memory. |
| */ |
| struct cpr3_msm8996_mmss_fuses { |
| u64 init_voltage[MSM8996_MMSS_FUSE_CORNERS]; |
| u64 offset_voltage[MSM8996_MMSS_FUSE_CORNERS]; |
| u64 speed_bin; |
| u64 cpr_fusing_rev; |
| u64 limitation; |
| u64 aging_init_quot_diff; |
| }; |
| |
| /* Fuse combos 0 - 7 map to CPR fusing revision 0 - 7 */ |
| #define CPR3_MSM8996_MMSS_FUSE_COMBO_COUNT 8 |
| |
| /* |
| * Fuse combos 0 - 7 map to CPR fusing revision 0 - 7 with speed bin fuse = 0. |
| * Fuse combos 8 - 15 map to CPR fusing revision 0 - 7 with speed bin fuse = 1. |
| */ |
| #define CPR3_MSM8996PRO_MMSS_FUSE_COMBO_COUNT 16 |
| |
| /* Fuse combos 0 - 7 map to CPR fusing revision 0 - 7 */ |
| #define CPR3_MSMCOBALT_MMSS_FUSE_COMBO_COUNT 8 |
| |
| /* |
| * MSM8996 MMSS fuse parameter locations: |
| * |
| * Structs are organized with the following dimensions: |
| * Outer: 0 to 3 for fuse corners from lowest to highest corner |
| * Inner: large enough to hold the longest set of parameter segments which |
| * fully defines a fuse parameter, +1 (for NULL termination). |
| * Each segment corresponds to a contiguous group of bits from a |
| * single fuse row. These segments are concatentated together in |
| * order to form the full fuse parameter value. The segments for |
| * a given parameter may correspond to different fuse rows. |
| */ |
| static const struct cpr3_fuse_param |
| msm8996_mmss_init_voltage_param[MSM8996_MMSS_FUSE_CORNERS][2] = { |
| {{63, 55, 59}, {} }, |
| {{63, 50, 54}, {} }, |
| {{63, 45, 49}, {} }, |
| {{63, 40, 44}, {} }, |
| }; |
| |
| static const struct cpr3_fuse_param msm8996_cpr_fusing_rev_param[] = { |
| {39, 48, 50}, |
| {}, |
| }; |
| |
| static const struct cpr3_fuse_param msm8996_cpr_limitation_param[] = { |
| {41, 31, 32}, |
| {}, |
| }; |
| |
| static const struct cpr3_fuse_param |
| msm8996_mmss_aging_init_quot_diff_param[] = { |
| {68, 26, 31}, |
| {}, |
| }; |
| |
| /* Offset voltages are defined for SVS and Turbo fuse corners only */ |
| static const struct cpr3_fuse_param |
| msm8996_mmss_offset_voltage_param[MSM8996_MMSS_FUSE_CORNERS][2] = { |
| {{} }, |
| {{66, 42, 44}, {} }, |
| {{} }, |
| {{64, 58, 61}, {} }, |
| }; |
| |
| static const struct cpr3_fuse_param msm8996pro_mmss_speed_bin_param[] = { |
| {39, 60, 61}, |
| {}, |
| }; |
| |
| /* MSMCOBALT MMSS fuse parameter locations: */ |
| static const struct cpr3_fuse_param |
| msmcobalt_mmss_init_voltage_param[MSM8996_MMSS_FUSE_CORNERS][2] = { |
| {{65, 39, 43}, {} }, |
| {{65, 34, 38}, {} }, |
| {{65, 29, 33}, {} }, |
| {{65, 24, 28}, {} }, |
| }; |
| |
| static const struct cpr3_fuse_param msmcobalt_cpr_fusing_rev_param[] = { |
| {39, 48, 50}, |
| {}, |
| }; |
| |
| static const struct cpr3_fuse_param msmcobalt_cpr_limitation_param[] = { |
| {41, 46, 47}, |
| {}, |
| }; |
| |
| static const struct cpr3_fuse_param |
| msmcobalt_mmss_aging_init_quot_diff_param[] = { |
| {65, 60, 63}, |
| {66, 0, 3}, |
| {}, |
| }; |
| |
| static const struct cpr3_fuse_param |
| msmcobalt_mmss_offset_voltage_param[MSM8996_MMSS_FUSE_CORNERS][2] = { |
| {{65, 56, 59}, {} }, |
| {{65, 52, 55}, {} }, |
| {{65, 48, 51}, {} }, |
| {{65, 44, 47}, {} }, |
| }; |
| |
| #define MSM8996PRO_SOC_ID 4 |
| #define MSMCOBALT_SOC_ID 5 |
| |
| /* |
| * Some initial msm8996 parts cannot be used in a meaningful way by software. |
| * Other parts can only be used when operating with CPR disabled (i.e. at the |
| * fused open-loop voltage) when no voltage interpolation is applied. A fuse |
| * parameter is provided so that software can properly handle these limitations. |
| */ |
| enum msm8996_cpr_limitation { |
| MSM8996_CPR_LIMITATION_NONE = 0, |
| MSM8996_CPR_LIMITATION_UNSUPPORTED = 2, |
| MSM8996_CPR_LIMITATION_NO_CPR_OR_INTERPOLATION = 3, |
| }; |
| |
| /* Additional MSM8996 specific data: */ |
| |
| /* Open loop voltage fuse reference voltages in microvolts */ |
| static const int msm8996_mmss_fuse_ref_volt[MSM8996_MMSS_FUSE_CORNERS] = { |
| 670000, |
| 745000, |
| 905000, |
| 1015000, |
| }; |
| |
| static const int msm8996pro_mmss_fuse_ref_volt[MSM8996_MMSS_FUSE_CORNERS] = { |
| 670000, |
| 745000, |
| 905000, |
| 1065000, |
| }; |
| |
| static const int msmcobalt_mmss_fuse_ref_volt[MSM8996_MMSS_FUSE_CORNERS] = { |
| 632000, |
| 768000, |
| 896000, |
| 1032000, |
| }; |
| |
| #define MSM8996_MMSS_FUSE_STEP_VOLT 10000 |
| #define MSM8996_MMSS_OFFSET_FUSE_STEP_VOLT 10000 |
| #define MSM8996_MMSS_VOLTAGE_FUSE_SIZE 5 |
| #define MSM8996_MMSS_AGING_INIT_QUOT_DIFF_SCALE 2 |
| #define MSM8996_MMSS_AGING_INIT_QUOT_DIFF_SIZE 6 |
| |
| #define MSM8996_MMSS_CPR_SENSOR_COUNT 35 |
| |
| #define MSM8996_MMSS_CPR_CLOCK_RATE 19200000 |
| |
| #define MSM8996_MMSS_AGING_SENSOR_ID 29 |
| #define MSM8996_MMSS_AGING_BYPASS_MASK0 (GENMASK(23, 0)) |
| |
| /* Use scaled gate count (GCNT) for aging measurements */ |
| #define MSM8996_MMSS_AGING_GCNT_SCALING_FACTOR 1500 |
| |
| #define MSMCOBALT_MMSS_AGING_INIT_QUOT_DIFF_SCALE 1 |
| #define MSMCOBALT_MMSS_AGING_INIT_QUOT_DIFF_SIZE 8 |
| |
| #define MSMCOBALT_MMSS_CPR_SENSOR_COUNT 35 |
| |
| #define MSMCOBALT_MMSS_AGING_SENSOR_ID 17 |
| #define MSMCOBALT_MMSS_AGING_BYPASS_MASK0 0 |
| |
| #define MSMCOBALT_MMSS_MAX_TEMP_POINTS 3 |
| #define MSMCOBALT_MMSS_TEMP_SENSOR_ID_START 12 |
| #define MSMCOBALT_MMSS_TEMP_SENSOR_ID_END 13 |
| |
| /** |
| * cpr3_msm8996_mmss_read_fuse_data() - load MMSS specific fuse parameter values |
| * @vreg: Pointer to the CPR3 regulator |
| * |
| * This function allocates a cpr3_msm8996_mmss_fuses struct, fills it with |
| * values read out of hardware fuses, and finally copies common fuse values |
| * into the regulator struct. |
| * |
| * Return: 0 on success, errno on failure |
| */ |
| static int cpr3_msm8996_mmss_read_fuse_data(struct cpr3_regulator *vreg) |
| { |
| void __iomem *base = vreg->thread->ctrl->fuse_base; |
| struct cpr3_msm8996_mmss_fuses *fuse; |
| int i, rc, combo_max; |
| |
| fuse = devm_kzalloc(vreg->thread->ctrl->dev, sizeof(*fuse), GFP_KERNEL); |
| if (!fuse) |
| return -ENOMEM; |
| |
| if (vreg->thread->ctrl->soc_revision == MSM8996PRO_SOC_ID) { |
| rc = cpr3_read_fuse_param(base, msm8996pro_mmss_speed_bin_param, |
| &fuse->speed_bin); |
| if (rc) { |
| cpr3_err(vreg, "Unable to read speed bin fuse, rc=%d\n", |
| rc); |
| return rc; |
| } |
| cpr3_info(vreg, "speed bin = %llu\n", fuse->speed_bin); |
| } |
| |
| rc = cpr3_read_fuse_param(base, |
| vreg->thread->ctrl->soc_revision == MSMCOBALT_SOC_ID |
| ? msmcobalt_cpr_fusing_rev_param |
| : msm8996_cpr_fusing_rev_param, |
| &fuse->cpr_fusing_rev); |
| if (rc) { |
| cpr3_err(vreg, "Unable to read CPR fusing revision fuse, rc=%d\n", |
| rc); |
| return rc; |
| } |
| cpr3_info(vreg, "CPR fusing revision = %llu\n", fuse->cpr_fusing_rev); |
| |
| rc = cpr3_read_fuse_param(base, |
| vreg->thread->ctrl->soc_revision == MSMCOBALT_SOC_ID |
| ? msmcobalt_cpr_limitation_param |
| : msm8996_cpr_limitation_param, |
| &fuse->limitation); |
| if (rc) { |
| cpr3_err(vreg, "Unable to read CPR limitation fuse, rc=%d\n", |
| rc); |
| return rc; |
| } |
| cpr3_info(vreg, "CPR limitation = %s\n", |
| fuse->limitation == MSM8996_CPR_LIMITATION_UNSUPPORTED |
| ? "unsupported chip" : fuse->limitation |
| == MSM8996_CPR_LIMITATION_NO_CPR_OR_INTERPOLATION |
| ? "CPR disabled and no interpolation" : "none"); |
| |
| rc = cpr3_read_fuse_param(base, |
| vreg->thread->ctrl->soc_revision == MSMCOBALT_SOC_ID |
| ? msmcobalt_mmss_aging_init_quot_diff_param |
| : msm8996_mmss_aging_init_quot_diff_param, |
| &fuse->aging_init_quot_diff); |
| if (rc) { |
| cpr3_err(vreg, "Unable to read aging initial quotient difference fuse, rc=%d\n", |
| rc); |
| return rc; |
| } |
| |
| for (i = 0; i < MSM8996_MMSS_FUSE_CORNERS; i++) { |
| rc = cpr3_read_fuse_param(base, |
| vreg->thread->ctrl->soc_revision == MSMCOBALT_SOC_ID |
| ? msmcobalt_mmss_init_voltage_param[i] |
| : msm8996_mmss_init_voltage_param[i], |
| &fuse->init_voltage[i]); |
| if (rc) { |
| cpr3_err(vreg, "Unable to read fuse-corner %d initial voltage fuse, rc=%d\n", |
| i, rc); |
| return rc; |
| } |
| |
| rc = cpr3_read_fuse_param(base, |
| vreg->thread->ctrl->soc_revision == MSMCOBALT_SOC_ID |
| ? msmcobalt_mmss_offset_voltage_param[i] |
| : msm8996_mmss_offset_voltage_param[i], |
| &fuse->offset_voltage[i]); |
| if (rc) { |
| cpr3_err(vreg, "Unable to read fuse-corner %d offset voltage fuse, rc=%d\n", |
| i, rc); |
| return rc; |
| } |
| } |
| |
| if (vreg->thread->ctrl->soc_revision == MSMCOBALT_SOC_ID) { |
| combo_max = CPR3_MSMCOBALT_MMSS_FUSE_COMBO_COUNT; |
| vreg->fuse_combo = fuse->cpr_fusing_rev; |
| } else if (vreg->thread->ctrl->soc_revision == MSM8996PRO_SOC_ID) { |
| combo_max = CPR3_MSM8996PRO_MMSS_FUSE_COMBO_COUNT; |
| vreg->fuse_combo = fuse->cpr_fusing_rev + 8 * fuse->speed_bin; |
| } else { |
| combo_max = CPR3_MSM8996_MMSS_FUSE_COMBO_COUNT; |
| vreg->fuse_combo = fuse->cpr_fusing_rev; |
| } |
| |
| if (vreg->fuse_combo >= combo_max) { |
| cpr3_err(vreg, "invalid CPR fuse combo = %d found, not in range 0 - %d\n", |
| vreg->fuse_combo, combo_max - 1); |
| return -EINVAL; |
| } |
| |
| vreg->speed_bin_fuse = fuse->speed_bin; |
| vreg->cpr_rev_fuse = fuse->cpr_fusing_rev; |
| vreg->fuse_corner_count = MSM8996_MMSS_FUSE_CORNERS; |
| vreg->platform_fuses = fuse; |
| |
| return 0; |
| } |
| |
| /** |
| * cpr3_mmss_parse_corner_data() - parse MMSS corner data from device tree |
| * properties of the regulator's device node |
| * @vreg: Pointer to the CPR3 regulator |
| * |
| * Return: 0 on success, errno on failure |
| */ |
| static int cpr3_mmss_parse_corner_data(struct cpr3_regulator *vreg) |
| { |
| int i, rc; |
| u32 *temp; |
| |
| rc = cpr3_parse_common_corner_data(vreg); |
| if (rc) { |
| cpr3_err(vreg, "error reading corner data, rc=%d\n", rc); |
| return rc; |
| } |
| |
| temp = kcalloc(vreg->corner_count * CPR3_RO_COUNT, sizeof(*temp), |
| GFP_KERNEL); |
| if (!temp) |
| return -ENOMEM; |
| |
| rc = cpr3_parse_corner_array_property(vreg, "qcom,cpr-target-quotients", |
| CPR3_RO_COUNT, temp); |
| if (rc) { |
| cpr3_err(vreg, "could not load target quotients, rc=%d\n", rc); |
| goto done; |
| } |
| |
| for (i = 0; i < vreg->corner_count; i++) |
| memcpy(vreg->corner[i].target_quot, &temp[i * CPR3_RO_COUNT], |
| sizeof(*temp) * CPR3_RO_COUNT); |
| |
| done: |
| kfree(temp); |
| return rc; |
| } |
| |
| /** |
| * cpr3_msm8996_mmss_apply_closed_loop_offset_voltages() - modify the |
| * closed-loop voltage adjustments by the amounts that are needed |
| * for this fuse combo |
| * @vreg: Pointer to the CPR3 regulator |
| * @volt_adjust: Array of closed-loop voltage adjustment values of length |
| * vreg->corner_count which is further adjusted based upon |
| * offset voltage fuse values. |
| * |
| * Return: 0 on success, errno on failure |
| */ |
| static int cpr3_msm8996_mmss_apply_closed_loop_offset_voltages( |
| struct cpr3_regulator *vreg, int *volt_adjust) |
| { |
| struct cpr3_msm8996_mmss_fuses *fuse = vreg->platform_fuses; |
| const struct cpr3_fuse_param (*offset_param)[2]; |
| u32 *corner_map; |
| int *volt_offset; |
| int rc = 0, i, fuse_len; |
| |
| if (!of_find_property(vreg->of_node, |
| "qcom,cpr-fused-closed-loop-voltage-adjustment-map", NULL)) { |
| /* No closed-loop offset required. */ |
| return 0; |
| } |
| |
| corner_map = kcalloc(vreg->corner_count, sizeof(*corner_map), |
| GFP_KERNEL); |
| volt_offset = kcalloc(vreg->fuse_corner_count, sizeof(*volt_offset), |
| GFP_KERNEL); |
| if (!corner_map || !volt_offset) { |
| rc = -ENOMEM; |
| goto done; |
| } |
| |
| rc = cpr3_parse_corner_array_property(vreg, |
| "qcom,cpr-fused-closed-loop-voltage-adjustment-map", |
| 1, corner_map); |
| if (rc) |
| goto done; |
| |
| offset_param = vreg->thread->ctrl->soc_revision == MSMCOBALT_SOC_ID |
| ? msmcobalt_mmss_offset_voltage_param |
| : msm8996_mmss_offset_voltage_param; |
| for (i = 0; i < vreg->fuse_corner_count; i++) { |
| fuse_len = offset_param[i][0].bit_end + 1 |
| - offset_param[i][0].bit_start; |
| volt_offset[i] = cpr3_convert_open_loop_voltage_fuse( |
| 0, MSM8996_MMSS_OFFSET_FUSE_STEP_VOLT, |
| fuse->offset_voltage[i], fuse_len); |
| if (volt_offset[i]) |
| cpr3_info(vreg, "fuse_corner[%d] offset=%7d uV\n", |
| i, volt_offset[i]); |
| } |
| |
| for (i = 0; i < vreg->corner_count; i++) { |
| if (corner_map[i] == 0) { |
| continue; |
| } else if (corner_map[i] > vreg->fuse_corner_count) { |
| cpr3_err(vreg, "corner %d mapped to invalid fuse corner: %u\n", |
| i, corner_map[i]); |
| rc = -EINVAL; |
| goto done; |
| } |
| |
| volt_adjust[i] += volt_offset[corner_map[i] - 1]; |
| } |
| |
| done: |
| kfree(corner_map); |
| kfree(volt_offset); |
| |
| return rc; |
| } |
| |
| /** |
| * cpr3_mmss_enforce_inc_quotient_monotonicity() - Ensure that target quotients |
| * increase monotonically from lower to higher corners |
| * @vreg: Pointer to the CPR3 regulator |
| * |
| * Return: 0 on success, errno on failure |
| */ |
| static void cpr3_mmss_enforce_inc_quotient_monotonicity( |
| struct cpr3_regulator *vreg) |
| { |
| int i, j; |
| |
| for (i = 1; i < vreg->corner_count; i++) { |
| for (j = 0; j < CPR3_RO_COUNT; j++) { |
| if (vreg->corner[i].target_quot[j] |
| && vreg->corner[i].target_quot[j] |
| < vreg->corner[i - 1].target_quot[j]) { |
| cpr3_debug(vreg, "corner %d RO%u target quot=%u < corner %d RO%u target quot=%u; overriding: corner %d RO%u target quot=%u\n", |
| i, j, |
| vreg->corner[i].target_quot[j], |
| i - 1, j, |
| vreg->corner[i - 1].target_quot[j], |
| i, j, |
| vreg->corner[i - 1].target_quot[j]); |
| vreg->corner[i].target_quot[j] |
| = vreg->corner[i - 1].target_quot[j]; |
| } |
| } |
| } |
| } |
| |
| /** |
| * cpr3_mmss_enforce_dec_quotient_monotonicity() - Ensure that target quotients |
| * decrease monotonically from higher to lower corners |
| * @vreg: Pointer to the CPR3 regulator |
| * |
| * Return: 0 on success, errno on failure |
| */ |
| static void cpr3_mmss_enforce_dec_quotient_monotonicity( |
| struct cpr3_regulator *vreg) |
| { |
| int i, j; |
| |
| for (i = vreg->corner_count - 2; i >= 0; i--) { |
| for (j = 0; j < CPR3_RO_COUNT; j++) { |
| if (vreg->corner[i + 1].target_quot[j] |
| && vreg->corner[i].target_quot[j] |
| > vreg->corner[i + 1].target_quot[j]) { |
| cpr3_debug(vreg, "corner %d RO%u target quot=%u > corner %d RO%u target quot=%u; overriding: corner %d RO%u target quot=%u\n", |
| i, j, |
| vreg->corner[i].target_quot[j], |
| i + 1, j, |
| vreg->corner[i + 1].target_quot[j], |
| i, j, |
| vreg->corner[i + 1].target_quot[j]); |
| vreg->corner[i].target_quot[j] |
| = vreg->corner[i + 1].target_quot[j]; |
| } |
| } |
| } |
| } |
| |
| /** |
| * _cpr3_mmss_adjust_target_quotients() - adjust the target quotients for each |
| * corner of the regulator according to input adjustment and |
| * scaling arrays |
| * @vreg: Pointer to the CPR3 regulator |
| * @volt_adjust: Pointer to an array of closed-loop voltage adjustments |
| * with units of microvolts. The array must have |
| * vreg->corner_count number of elements. |
| * @ro_scale: Pointer to a flattened 2D array of RO scaling factors. |
| * The array must have an inner dimension of CPR3_RO_COUNT |
| * and an outer dimension of vreg->corner_count |
| * @label: Null terminated string providing a label for the type |
| * of adjustment. |
| * |
| * Return: true if any corners received a positive voltage adjustment (> 0), |
| * else false |
| */ |
| static bool _cpr3_mmss_adjust_target_quotients(struct cpr3_regulator *vreg, |
| const int *volt_adjust, const int *ro_scale, const char *label) |
| { |
| int i, j, quot_adjust; |
| bool is_increasing = false; |
| u32 prev_quot; |
| |
| for (i = 0; i < vreg->corner_count; i++) { |
| for (j = 0; j < CPR3_RO_COUNT; j++) { |
| if (vreg->corner[i].target_quot[j]) { |
| quot_adjust = cpr3_quot_adjustment( |
| ro_scale[i * CPR3_RO_COUNT + j], |
| volt_adjust[i]); |
| if (quot_adjust) { |
| prev_quot = vreg->corner[i]. |
| target_quot[j]; |
| vreg->corner[i].target_quot[j] |
| += quot_adjust; |
| cpr3_debug(vreg, "adjusted corner %d RO%d target quot %s: %u --> %u (%d uV)\n", |
| i, j, label, prev_quot, |
| vreg->corner[i].target_quot[j], |
| volt_adjust[i]); |
| } |
| } |
| } |
| if (volt_adjust[i] > 0) |
| is_increasing = true; |
| } |
| |
| return is_increasing; |
| } |
| |
| /** |
| * cpr3_mmss_adjust_target_quotients() - adjust the target quotients for each |
| * corner according to device tree values and fuse values |
| * @vreg: Pointer to the CPR3 regulator |
| * |
| * Return: 0 on success, errno on failure |
| */ |
| static int cpr3_mmss_adjust_target_quotients(struct cpr3_regulator *vreg) |
| { |
| int i, rc; |
| int *volt_adjust, *ro_scale; |
| bool explicit_adjustment, fused_adjustment, is_increasing; |
| |
| explicit_adjustment = of_find_property(vreg->of_node, |
| "qcom,cpr-closed-loop-voltage-adjustment", NULL); |
| fused_adjustment = of_find_property(vreg->of_node, |
| "qcom,cpr-fused-closed-loop-voltage-adjustment-map", NULL); |
| |
| if (!explicit_adjustment && !fused_adjustment && !vreg->aging_allowed) { |
| /* No adjustment required. */ |
| return 0; |
| } else if (!of_find_property(vreg->of_node, |
| "qcom,cpr-ro-scaling-factor", NULL)) { |
| cpr3_err(vreg, "qcom,cpr-ro-scaling-factor is required for closed-loop voltage adjustment, but is missing\n"); |
| return -EINVAL; |
| } |
| |
| volt_adjust = kcalloc(vreg->corner_count, sizeof(*volt_adjust), |
| GFP_KERNEL); |
| ro_scale = kcalloc(vreg->corner_count * CPR3_RO_COUNT, |
| sizeof(*ro_scale), GFP_KERNEL); |
| if (!volt_adjust || !ro_scale) { |
| rc = -ENOMEM; |
| goto done; |
| } |
| |
| rc = cpr3_parse_corner_array_property(vreg, |
| "qcom,cpr-ro-scaling-factor", CPR3_RO_COUNT, ro_scale); |
| if (rc) { |
| cpr3_err(vreg, "could not load RO scaling factors, rc=%d\n", |
| rc); |
| goto done; |
| } |
| |
| for (i = 0; i < vreg->corner_count; i++) |
| memcpy(vreg->corner[i].ro_scale, &ro_scale[i * CPR3_RO_COUNT], |
| sizeof(*ro_scale) * CPR3_RO_COUNT); |
| |
| if (explicit_adjustment) { |
| rc = cpr3_parse_corner_array_property(vreg, |
| "qcom,cpr-closed-loop-voltage-adjustment", |
| 1, volt_adjust); |
| if (rc) { |
| cpr3_err(vreg, "could not load closed-loop voltage adjustments, rc=%d\n", |
| rc); |
| goto done; |
| } |
| |
| _cpr3_mmss_adjust_target_quotients(vreg, volt_adjust, ro_scale, |
| "from DT"); |
| cpr3_mmss_enforce_inc_quotient_monotonicity(vreg); |
| } |
| |
| if (fused_adjustment) { |
| memset(volt_adjust, 0, |
| sizeof(*volt_adjust) * vreg->corner_count); |
| |
| rc = cpr3_msm8996_mmss_apply_closed_loop_offset_voltages(vreg, |
| volt_adjust); |
| if (rc) { |
| cpr3_err(vreg, "could not apply fused closed-loop voltage reductions, rc=%d\n", |
| rc); |
| goto done; |
| } |
| |
| is_increasing = _cpr3_mmss_adjust_target_quotients(vreg, |
| volt_adjust, ro_scale, "from fuse"); |
| if (is_increasing) |
| cpr3_mmss_enforce_inc_quotient_monotonicity(vreg); |
| else |
| cpr3_mmss_enforce_dec_quotient_monotonicity(vreg); |
| } |
| |
| done: |
| kfree(volt_adjust); |
| kfree(ro_scale); |
| return rc; |
| } |
| |
| /** |
| * cpr3_msm8996_mmss_calculate_open_loop_voltages() - calculate the open-loop |
| * voltage for each corner of a CPR3 regulator |
| * @vreg: Pointer to the CPR3 regulator |
| * |
| * If open-loop voltage interpolation is allowed in both device tree and in |
| * hardware fuses, then this function calculates the open-loop voltage for a |
| * given corner using linear interpolation. This interpolation is performed |
| * using the processor frequencies of the lower and higher Fmax corners along |
| * with their fused open-loop voltages. |
| * |
| * If open-loop voltage interpolation is not allowed, then this function uses |
| * the Fmax fused open-loop voltage for all of the corners associated with a |
| * given fuse corner. |
| * |
| * Return: 0 on success, errno on failure |
| */ |
| static int cpr3_msm8996_mmss_calculate_open_loop_voltages( |
| struct cpr3_regulator *vreg) |
| { |
| struct device_node *node = vreg->of_node; |
| struct cpr3_msm8996_mmss_fuses *fuse = vreg->platform_fuses; |
| int rc = 0; |
| bool allow_interpolation; |
| u64 freq_low, volt_low, freq_high, volt_high; |
| int i, j; |
| const int *ref_volt; |
| int *fuse_volt; |
| int *fmax_corner; |
| |
| fuse_volt = kcalloc(vreg->fuse_corner_count, sizeof(*fuse_volt), |
| GFP_KERNEL); |
| fmax_corner = kcalloc(vreg->fuse_corner_count, sizeof(*fmax_corner), |
| GFP_KERNEL); |
| if (!fuse_volt || !fmax_corner) { |
| rc = -ENOMEM; |
| goto done; |
| } |
| |
| if (vreg->thread->ctrl->soc_revision == MSMCOBALT_SOC_ID) |
| ref_volt = msmcobalt_mmss_fuse_ref_volt; |
| else if (vreg->thread->ctrl->soc_revision == MSM8996PRO_SOC_ID) |
| ref_volt = msm8996pro_mmss_fuse_ref_volt; |
| else |
| ref_volt = msm8996_mmss_fuse_ref_volt; |
| |
| for (i = 0; i < vreg->fuse_corner_count; i++) { |
| fuse_volt[i] = cpr3_convert_open_loop_voltage_fuse(ref_volt[i], |
| MSM8996_MMSS_FUSE_STEP_VOLT, fuse->init_voltage[i], |
| MSM8996_MMSS_VOLTAGE_FUSE_SIZE); |
| cpr3_info(vreg, "fuse_corner[%d] open-loop=%7d uV\n", |
| i, fuse_volt[i]); |
| } |
| |
| rc = cpr3_adjust_fused_open_loop_voltages(vreg, fuse_volt); |
| if (rc) { |
| cpr3_err(vreg, "fused open-loop voltage adjustment failed, rc=%d\n", |
| rc); |
| goto done; |
| } |
| |
| allow_interpolation = of_property_read_bool(node, |
| "qcom,allow-voltage-interpolation"); |
| |
| for (i = 1; i < vreg->fuse_corner_count; i++) { |
| if (fuse_volt[i] < fuse_volt[i - 1]) { |
| cpr3_debug(vreg, "fuse corner %d voltage=%d uV < fuse corner %d voltage=%d uV; overriding: fuse corner %d voltage=%d\n", |
| i, fuse_volt[i], i - 1, fuse_volt[i - 1], |
| i, fuse_volt[i - 1]); |
| fuse_volt[i] = fuse_volt[i - 1]; |
| } |
| } |
| |
| if (fuse->limitation == MSM8996_CPR_LIMITATION_NO_CPR_OR_INTERPOLATION) |
| allow_interpolation = false; |
| |
| if (!allow_interpolation) { |
| /* Use fused open-loop voltage for lower frequencies. */ |
| for (i = 0; i < vreg->corner_count; i++) |
| vreg->corner[i].open_loop_volt |
| = fuse_volt[vreg->corner[i].cpr_fuse_corner]; |
| goto done; |
| } |
| |
| /* Determine highest corner mapped to each fuse corner */ |
| j = vreg->fuse_corner_count - 1; |
| for (i = vreg->corner_count - 1; i >= 0; i--) { |
| if (vreg->corner[i].cpr_fuse_corner == j) { |
| fmax_corner[j] = i; |
| j--; |
| } |
| } |
| if (j >= 0) { |
| cpr3_err(vreg, "invalid fuse corner mapping\n"); |
| rc = -EINVAL; |
| goto done; |
| } |
| |
| /* |
| * Interpolation is not possible for corners mapped to the lowest fuse |
| * corner so use the fuse corner value directly. |
| */ |
| for (i = 0; i <= fmax_corner[0]; i++) |
| vreg->corner[i].open_loop_volt = fuse_volt[0]; |
| |
| /* Interpolate voltages for the higher fuse corners. */ |
| for (i = 1; i < vreg->fuse_corner_count; i++) { |
| freq_low = vreg->corner[fmax_corner[i - 1]].proc_freq; |
| volt_low = fuse_volt[i - 1]; |
| freq_high = vreg->corner[fmax_corner[i]].proc_freq; |
| volt_high = fuse_volt[i]; |
| |
| for (j = fmax_corner[i - 1] + 1; j <= fmax_corner[i]; j++) |
| vreg->corner[j].open_loop_volt = cpr3_interpolate( |
| freq_low, volt_low, freq_high, volt_high, |
| vreg->corner[j].proc_freq); |
| } |
| |
| done: |
| if (rc == 0) { |
| cpr3_debug(vreg, "unadjusted per-corner open-loop voltages:\n"); |
| for (i = 0; i < vreg->corner_count; i++) |
| cpr3_debug(vreg, "open-loop[%2d] = %d uV\n", i, |
| vreg->corner[i].open_loop_volt); |
| |
| rc = cpr3_adjust_open_loop_voltages(vreg); |
| if (rc) |
| cpr3_err(vreg, "open-loop voltage adjustment failed, rc=%d\n", |
| rc); |
| } |
| |
| kfree(fuse_volt); |
| kfree(fmax_corner); |
| return rc; |
| } |
| |
| /** |
| * cpr3_mmss_print_settings() - print out MMSS CPR configuration settings into |
| * the kernel log for debugging purposes |
| * @vreg: Pointer to the CPR3 regulator |
| */ |
| static void cpr3_mmss_print_settings(struct cpr3_regulator *vreg) |
| { |
| struct cpr3_corner *corner; |
| int i; |
| |
| cpr3_debug(vreg, "Corner: Frequency (Hz), Fuse Corner, Floor (uV), Open-Loop (uV), Ceiling (uV)\n"); |
| for (i = 0; i < vreg->corner_count; i++) { |
| corner = &vreg->corner[i]; |
| cpr3_debug(vreg, "%3d: %10u, %2d, %7d, %7d, %7d\n", |
| i, corner->proc_freq, corner->cpr_fuse_corner, |
| corner->floor_volt, corner->open_loop_volt, |
| corner->ceiling_volt); |
| } |
| } |
| |
| /** |
| * cpr3_mmss_init_aging() - perform MMSS CPR3 controller specific |
| * aging initializations |
| * @ctrl: Pointer to the CPR3 controller |
| * |
| * Return: 0 on success, errno on failure |
| */ |
| static int cpr3_mmss_init_aging(struct cpr3_controller *ctrl) |
| { |
| struct cpr3_msm8996_mmss_fuses *fuse; |
| struct cpr3_regulator *vreg; |
| u32 aging_ro_scale; |
| int rc; |
| |
| vreg = &ctrl->thread[0].vreg[0]; |
| |
| ctrl->aging_required = vreg->aging_allowed; |
| fuse = vreg->platform_fuses; |
| |
| if (!ctrl->aging_required || !fuse) |
| return 0; |
| |
| rc = cpr3_parse_array_property(vreg, "qcom,cpr-aging-ro-scaling-factor", |
| 1, &aging_ro_scale); |
| if (rc) |
| return rc; |
| |
| if (aging_ro_scale == 0) { |
| cpr3_err(ctrl, "aging RO scaling factor is invalid: %u\n", |
| aging_ro_scale); |
| return -EINVAL; |
| } |
| |
| ctrl->aging_vdd_mode = REGULATOR_MODE_NORMAL; |
| ctrl->aging_complete_vdd_mode = REGULATOR_MODE_IDLE; |
| |
| ctrl->aging_sensor_count = 1; |
| ctrl->aging_sensor = kzalloc(sizeof(*ctrl->aging_sensor), GFP_KERNEL); |
| if (!ctrl->aging_sensor) |
| return -ENOMEM; |
| |
| ctrl->aging_sensor->ro_scale = aging_ro_scale; |
| ctrl->aging_gcnt_scaling_factor |
| = MSM8996_MMSS_AGING_GCNT_SCALING_FACTOR; |
| |
| if (vreg->thread->ctrl->soc_revision == MSMCOBALT_SOC_ID) { |
| ctrl->aging_sensor->sensor_id = MSMCOBALT_MMSS_AGING_SENSOR_ID; |
| ctrl->aging_sensor->bypass_mask[0] |
| = MSMCOBALT_MMSS_AGING_BYPASS_MASK0; |
| ctrl->aging_sensor->init_quot_diff |
| = cpr3_convert_open_loop_voltage_fuse(0, |
| MSMCOBALT_MMSS_AGING_INIT_QUOT_DIFF_SCALE, |
| fuse->aging_init_quot_diff, |
| MSMCOBALT_MMSS_AGING_INIT_QUOT_DIFF_SIZE); |
| } else { |
| ctrl->aging_sensor->sensor_id = MSM8996_MMSS_AGING_SENSOR_ID; |
| ctrl->aging_sensor->bypass_mask[0] |
| = MSM8996_MMSS_AGING_BYPASS_MASK0; |
| ctrl->aging_sensor->init_quot_diff |
| = cpr3_convert_open_loop_voltage_fuse(0, |
| MSM8996_MMSS_AGING_INIT_QUOT_DIFF_SCALE, |
| fuse->aging_init_quot_diff, |
| MSM8996_MMSS_AGING_INIT_QUOT_DIFF_SIZE); |
| } |
| |
| cpr3_debug(ctrl, "sensor %u aging init quotient diff = %d, aging RO scale = %u QUOT/V\n", |
| ctrl->aging_sensor->sensor_id, |
| ctrl->aging_sensor->init_quot_diff, |
| ctrl->aging_sensor->ro_scale); |
| |
| return 0; |
| } |
| |
| /** |
| * cpr3_mmss_init_thread() - perform all steps necessary to initialize the |
| * configuration data for a CPR3 thread |
| * @thread: Pointer to the CPR3 thread |
| * |
| * Return: 0 on success, errno on failure |
| */ |
| static int cpr3_mmss_init_thread(struct cpr3_thread *thread) |
| { |
| struct cpr3_regulator *vreg = &thread->vreg[0]; |
| struct cpr3_msm8996_mmss_fuses *fuse; |
| int rc; |
| |
| rc = cpr3_parse_common_thread_data(thread); |
| if (rc) { |
| cpr3_err(vreg, "unable to read CPR thread data from device tree, rc=%d\n", |
| rc); |
| return rc; |
| } |
| |
| rc = cpr3_msm8996_mmss_read_fuse_data(vreg); |
| if (rc) { |
| cpr3_err(vreg, "unable to read CPR fuse data, rc=%d\n", rc); |
| return rc; |
| } |
| |
| fuse = vreg->platform_fuses; |
| if (fuse->limitation == MSM8996_CPR_LIMITATION_UNSUPPORTED) { |
| cpr3_err(vreg, "this chip requires an unsupported voltage\n"); |
| return -EPERM; |
| } else if (fuse->limitation |
| == MSM8996_CPR_LIMITATION_NO_CPR_OR_INTERPOLATION) { |
| thread->ctrl->cpr_allowed_hw = false; |
| } |
| |
| rc = cpr3_mmss_parse_corner_data(vreg); |
| if (rc) { |
| cpr3_err(vreg, "unable to read CPR corner data from device tree, rc=%d\n", |
| rc); |
| return rc; |
| } |
| |
| rc = cpr3_mmss_adjust_target_quotients(vreg); |
| if (rc) { |
| cpr3_err(vreg, "unable to adjust target quotients, rc=%d\n", |
| rc); |
| return rc; |
| } |
| |
| rc = cpr3_msm8996_mmss_calculate_open_loop_voltages(vreg); |
| if (rc) { |
| cpr3_err(vreg, "unable to calculate open-loop voltages, rc=%d\n", |
| rc); |
| return rc; |
| } |
| |
| rc = cpr3_limit_open_loop_voltages(vreg); |
| if (rc) { |
| cpr3_err(vreg, "unable to limit open-loop voltages, rc=%d\n", |
| rc); |
| return rc; |
| } |
| |
| cpr3_open_loop_voltage_as_ceiling(vreg); |
| |
| rc = cpr3_limit_floor_voltages(vreg); |
| if (rc) { |
| cpr3_err(vreg, "unable to limit floor voltages, rc=%d\n", rc); |
| return rc; |
| } |
| |
| if (thread->ctrl->soc_revision == MSMCOBALT_SOC_ID) { |
| rc = cpr4_parse_core_count_temp_voltage_adj(vreg, false); |
| if (rc) { |
| cpr3_err(vreg, "unable to parse temperature based voltage adjustments, rc=%d\n", |
| rc); |
| return rc; |
| } |
| } |
| |
| cpr3_mmss_print_settings(vreg); |
| |
| return 0; |
| } |
| |
| /** |
| * cpr4_mmss_parse_temp_adj_properties() - parse temperature based |
| * adjustment properties from device tree |
| * @ctrl: Pointer to the CPR3 controller |
| * |
| * Return: 0 on success, errno on failure |
| */ |
| static int cpr4_mmss_parse_temp_adj_properties(struct cpr3_controller *ctrl) |
| { |
| struct device_node *of_node = ctrl->dev->of_node; |
| int rc, len, temp_point_count; |
| |
| if (!of_find_property(of_node, "qcom,cpr-temp-point-map", &len)) |
| return 0; |
| |
| temp_point_count = len / sizeof(u32); |
| if (temp_point_count <= 0 |
| || temp_point_count > MSMCOBALT_MMSS_MAX_TEMP_POINTS) { |
| cpr3_err(ctrl, "invalid number of temperature points %d > %d (max)\n", |
| temp_point_count, MSMCOBALT_MMSS_MAX_TEMP_POINTS); |
| return -EINVAL; |
| } |
| |
| ctrl->temp_points = devm_kcalloc(ctrl->dev, temp_point_count, |
| sizeof(*ctrl->temp_points), GFP_KERNEL); |
| if (!ctrl->temp_points) |
| return -ENOMEM; |
| |
| rc = of_property_read_u32_array(of_node, "qcom,cpr-temp-point-map", |
| ctrl->temp_points, temp_point_count); |
| if (rc) { |
| cpr3_err(ctrl, "error reading property qcom,cpr-temp-point-map, rc=%d\n", |
| rc); |
| return rc; |
| } |
| |
| /* |
| * If t1, t2, and t3 are the temperature points, then the temperature |
| * bands are: (-inf, t1], (t1, t2], (t2, t3], and (t3, inf). |
| */ |
| ctrl->temp_band_count = temp_point_count + 1; |
| |
| rc = of_property_read_u32(of_node, "qcom,cpr-initial-temp-band", |
| &ctrl->initial_temp_band); |
| if (rc) { |
| cpr3_err(ctrl, "error reading qcom,cpr-initial-temp-band, rc=%d\n", |
| rc); |
| return rc; |
| } |
| |
| if (ctrl->initial_temp_band >= ctrl->temp_band_count) { |
| cpr3_err(ctrl, "Initial temperature band value %d should be in range [0 - %d]\n", |
| ctrl->initial_temp_band, ctrl->temp_band_count - 1); |
| return -EINVAL; |
| } |
| |
| ctrl->temp_sensor_id_start = MSMCOBALT_MMSS_TEMP_SENSOR_ID_START; |
| ctrl->temp_sensor_id_end = MSMCOBALT_MMSS_TEMP_SENSOR_ID_END; |
| ctrl->allow_temp_adj = true; |
| |
| return rc; |
| } |
| |
| /** |
| * cpr3_mmss_init_controller() - perform MMSS CPR3 controller specific |
| * initializations |
| * @ctrl: Pointer to the CPR3 controller |
| * |
| * Return: 0 on success, errno on failure |
| */ |
| static int cpr3_mmss_init_controller(struct cpr3_controller *ctrl) |
| { |
| int rc; |
| |
| rc = cpr3_parse_common_ctrl_data(ctrl); |
| if (rc) { |
| if (rc != -EPROBE_DEFER) |
| cpr3_err(ctrl, "unable to parse common controller data, rc=%d\n", |
| rc); |
| return rc; |
| } |
| |
| if (ctrl->soc_revision == MSMCOBALT_SOC_ID) { |
| rc = cpr4_mmss_parse_temp_adj_properties(ctrl); |
| if (rc) |
| return rc; |
| } |
| |
| ctrl->sensor_count = ctrl->soc_revision == MSMCOBALT_SOC_ID |
| ? MSMCOBALT_MMSS_CPR_SENSOR_COUNT |
| : MSM8996_MMSS_CPR_SENSOR_COUNT; |
| |
| /* |
| * MMSS only has one thread (0) so the zeroed array does not need |
| * further modification. |
| */ |
| ctrl->sensor_owner = devm_kcalloc(ctrl->dev, ctrl->sensor_count, |
| sizeof(*ctrl->sensor_owner), GFP_KERNEL); |
| if (!ctrl->sensor_owner) |
| return -ENOMEM; |
| |
| ctrl->cpr_clock_rate = MSM8996_MMSS_CPR_CLOCK_RATE; |
| ctrl->ctrl_type = ctrl->soc_revision == MSMCOBALT_SOC_ID |
| ? CPR_CTRL_TYPE_CPR4 : CPR_CTRL_TYPE_CPR3; |
| |
| if (ctrl->ctrl_type == CPR_CTRL_TYPE_CPR4) { |
| /* |
| * Use fixed step quotient if specified otherwise use dynamic |
| * calculated per RO step quotient |
| */ |
| of_property_read_u32(ctrl->dev->of_node, |
| "qcom,cpr-step-quot-fixed", |
| &ctrl->step_quot_fixed); |
| ctrl->use_dynamic_step_quot = !ctrl->step_quot_fixed; |
| } |
| |
| ctrl->iface_clk = devm_clk_get(ctrl->dev, "iface_clk"); |
| if (IS_ERR(ctrl->iface_clk)) { |
| rc = PTR_ERR(ctrl->iface_clk); |
| if (ctrl->soc_revision == MSMCOBALT_SOC_ID) { |
| /* iface_clk is optional for msmcobalt */ |
| ctrl->iface_clk = NULL; |
| } else if (rc == -EPROBE_DEFER) { |
| return rc; |
| } else { |
| cpr3_err(ctrl, "unable to request interface clock, rc=%d\n", |
| rc); |
| return rc; |
| } |
| } |
| |
| ctrl->bus_clk = devm_clk_get(ctrl->dev, "bus_clk"); |
| if (IS_ERR(ctrl->bus_clk)) { |
| rc = PTR_ERR(ctrl->bus_clk); |
| if (rc != -EPROBE_DEFER) |
| cpr3_err(ctrl, "unable request bus clock, rc=%d\n", |
| rc); |
| return rc; |
| } |
| |
| return 0; |
| } |
| |
| static int cpr3_mmss_regulator_suspend(struct platform_device *pdev, |
| pm_message_t state) |
| { |
| struct cpr3_controller *ctrl = platform_get_drvdata(pdev); |
| |
| return cpr3_regulator_suspend(ctrl); |
| } |
| |
| static int cpr3_mmss_regulator_resume(struct platform_device *pdev) |
| { |
| struct cpr3_controller *ctrl = platform_get_drvdata(pdev); |
| |
| return cpr3_regulator_resume(ctrl); |
| } |
| |
| /* Data corresponds to the SoC revision */ |
| static struct of_device_id cpr_regulator_match_table[] = { |
| { |
| .compatible = "qcom,cpr3-msm8996-v1-mmss-regulator", |
| .data = (void *)(uintptr_t)1, |
| }, |
| { |
| .compatible = "qcom,cpr3-msm8996-v2-mmss-regulator", |
| .data = (void *)(uintptr_t)2, |
| }, |
| { |
| .compatible = "qcom,cpr3-msm8996-v3-mmss-regulator", |
| .data = (void *)(uintptr_t)3, |
| }, |
| { |
| .compatible = "qcom,cpr3-msm8996-mmss-regulator", |
| .data = (void *)(uintptr_t)3, |
| }, |
| { |
| .compatible = "qcom,cpr3-msm8996pro-mmss-regulator", |
| .data = (void *)(uintptr_t)MSM8996PRO_SOC_ID, |
| }, |
| { |
| .compatible = "qcom,cpr4-msmcobalt-mmss-regulator", |
| .data = (void *)(uintptr_t)MSMCOBALT_SOC_ID, |
| }, |
| {} |
| }; |
| |
| static int cpr3_mmss_regulator_probe(struct platform_device *pdev) |
| { |
| struct device *dev = &pdev->dev; |
| const struct of_device_id *match; |
| struct cpr3_controller *ctrl; |
| int rc; |
| |
| if (!dev->of_node) { |
| dev_err(dev, "Device tree node is missing\n"); |
| return -EINVAL; |
| } |
| |
| ctrl = devm_kzalloc(dev, sizeof(*ctrl), GFP_KERNEL); |
| if (!ctrl) |
| return -ENOMEM; |
| |
| ctrl->dev = dev; |
| /* Set to false later if anything precludes CPR operation. */ |
| ctrl->cpr_allowed_hw = true; |
| |
| rc = of_property_read_string(dev->of_node, "qcom,cpr-ctrl-name", |
| &ctrl->name); |
| if (rc) { |
| cpr3_err(ctrl, "unable to read qcom,cpr-ctrl-name, rc=%d\n", |
| rc); |
| return rc; |
| } |
| |
| match = of_match_node(cpr_regulator_match_table, dev->of_node); |
| if (match) |
| ctrl->soc_revision = (uintptr_t)match->data; |
| else |
| cpr3_err(ctrl, "could not find compatible string match\n"); |
| |
| rc = cpr3_map_fuse_base(ctrl, pdev); |
| if (rc) { |
| cpr3_err(ctrl, "could not map fuse base address\n"); |
| return rc; |
| } |
| |
| rc = cpr3_allocate_threads(ctrl, 0, 0); |
| if (rc) { |
| cpr3_err(ctrl, "failed to allocate CPR thread array, rc=%d\n", |
| rc); |
| return rc; |
| } |
| |
| if (ctrl->thread_count != 1) { |
| cpr3_err(ctrl, "expected 1 thread but found %d\n", |
| ctrl->thread_count); |
| return -EINVAL; |
| } else if (ctrl->thread[0].vreg_count != 1) { |
| cpr3_err(ctrl, "expected 1 regulator but found %d\n", |
| ctrl->thread[0].vreg_count); |
| return -EINVAL; |
| } |
| |
| rc = cpr3_mmss_init_controller(ctrl); |
| if (rc) { |
| if (rc != -EPROBE_DEFER) |
| cpr3_err(ctrl, "failed to initialize CPR controller parameters, rc=%d\n", |
| rc); |
| return rc; |
| } |
| |
| rc = cpr3_mmss_init_thread(&ctrl->thread[0]); |
| if (rc) { |
| cpr3_err(&ctrl->thread[0].vreg[0], "thread initialization failed, rc=%d\n", |
| rc); |
| return rc; |
| } |
| |
| rc = cpr3_mem_acc_init(&ctrl->thread[0].vreg[0]); |
| if (rc) { |
| cpr3_err(ctrl, "failed to initialize mem-acc configuration, rc=%d\n", |
| rc); |
| return rc; |
| } |
| |
| rc = cpr3_mmss_init_aging(ctrl); |
| if (rc) { |
| cpr3_err(ctrl, "failed to initialize aging configurations, rc=%d\n", |
| rc); |
| return rc; |
| } |
| |
| platform_set_drvdata(pdev, ctrl); |
| |
| return cpr3_regulator_register(pdev, ctrl); |
| } |
| |
| static int cpr3_mmss_regulator_remove(struct platform_device *pdev) |
| { |
| struct cpr3_controller *ctrl = platform_get_drvdata(pdev); |
| |
| return cpr3_regulator_unregister(ctrl); |
| } |
| |
| static struct platform_driver cpr3_mmss_regulator_driver = { |
| .driver = { |
| .name = "qcom,cpr3-mmss-regulator", |
| .of_match_table = cpr_regulator_match_table, |
| .owner = THIS_MODULE, |
| }, |
| .probe = cpr3_mmss_regulator_probe, |
| .remove = cpr3_mmss_regulator_remove, |
| .suspend = cpr3_mmss_regulator_suspend, |
| .resume = cpr3_mmss_regulator_resume, |
| }; |
| |
| static int cpr_regulator_init(void) |
| { |
| return platform_driver_register(&cpr3_mmss_regulator_driver); |
| } |
| |
| static void cpr_regulator_exit(void) |
| { |
| platform_driver_unregister(&cpr3_mmss_regulator_driver); |
| } |
| |
| MODULE_DESCRIPTION("CPR3 MMSS regulator driver"); |
| MODULE_LICENSE("GPL v2"); |
| |
| arch_initcall(cpr_regulator_init); |
| module_exit(cpr_regulator_exit); |