/* * 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 #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "cpr3-regulator.h" #define MSM8953_APSS_FUSE_CORNERS 4 /** * struct cpr4_msm8953_apss_fuses - APSS specific fuse data for MSM8953 * @ro_sel: Ring oscillator select fuse parameter value for each * fuse corner * @init_voltage: Initial (i.e. open-loop) voltage fuse parameter value * for each fuse corner (raw, not converted to a voltage) * @target_quot: CPR target quotient fuse parameter value for each fuse * corner * @quot_offset: CPR target quotient offset fuse parameter value for each * fuse corner (raw, not unpacked) used for target quotient * interpolation * @speed_bin: Application processor speed bin fuse parameter value for * the given chip * @cpr_fusing_rev: CPR fusing revision fuse parameter value * @foundry_id: Foundry identifier fuse parameter value for the given * chip * @boost_cfg: CPR boost configuration fuse parameter value * @boost_voltage: CPR boost voltage fuse parameter value (raw, not * converted to a voltage) * @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 cpr4_msm8953_apss_fuses { u64 ro_sel[MSM8953_APSS_FUSE_CORNERS]; u64 init_voltage[MSM8953_APSS_FUSE_CORNERS]; u64 target_quot[MSM8953_APSS_FUSE_CORNERS]; u64 quot_offset[MSM8953_APSS_FUSE_CORNERS]; u64 speed_bin; u64 cpr_fusing_rev; u64 foundry_id; u64 boost_cfg; u64 boost_voltage; u64 misc; u64 aging_init_quot_diff; }; /* * fuse combo = fusing revision + 8 * (speed bin) * where: fusing revision = 0 - 7 and speed bin = 0 - 7 */ #define CPR4_MSM8953_APSS_FUSE_COMBO_COUNT 64 /* * Constants which define the name of each fuse corner. */ enum cpr4_msm8953_apss_fuse_corner { CPR4_MSM8953_APSS_FUSE_CORNER_LOWSVS = 0, CPR4_MSM8953_APSS_FUSE_CORNER_SVS = 1, CPR4_MSM8953_APSS_FUSE_CORNER_NOM = 2, CPR4_MSM8953_APSS_FUSE_CORNER_TURBO_L1 = 3, }; static const char * const cpr4_msm8953_apss_fuse_corner_name[] = { [CPR4_MSM8953_APSS_FUSE_CORNER_LOWSVS] = "LowSVS", [CPR4_MSM8953_APSS_FUSE_CORNER_SVS] = "SVS", [CPR4_MSM8953_APSS_FUSE_CORNER_NOM] = "NOM", [CPR4_MSM8953_APSS_FUSE_CORNER_TURBO_L1] = "TURBO_L1", }; /* * MSM8953 APSS 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 msm8953_apss_ro_sel_param[MSM8953_APSS_FUSE_CORNERS][2] = { {{73, 12, 15}, {} }, {{73, 8, 11}, {} }, {{73, 4, 7}, {} }, {{73, 0, 3}, {} }, }; static const struct cpr3_fuse_param msm8953_apss_init_voltage_param[MSM8953_APSS_FUSE_CORNERS][2] = { {{71, 24, 29}, {} }, {{71, 18, 23}, {} }, {{71, 12, 17}, {} }, {{71, 6, 11}, {} }, }; static const struct cpr3_fuse_param msm8953_apss_target_quot_param[MSM8953_APSS_FUSE_CORNERS][2] = { {{72, 44, 55}, {} }, {{72, 32, 43}, {} }, {{72, 20, 31}, {} }, {{72, 8, 19}, {} }, }; static const struct cpr3_fuse_param msm8953_apss_quot_offset_param[MSM8953_APSS_FUSE_CORNERS][2] = { {{} }, {{71, 46, 52}, {} }, {{71, 39, 45}, {} }, {{71, 32, 38}, {} }, }; static const struct cpr3_fuse_param msm8953_cpr_fusing_rev_param[] = { {71, 53, 55}, {}, }; static const struct cpr3_fuse_param msm8953_apss_speed_bin_param[] = { {36, 40, 42}, {}, }; static const struct cpr3_fuse_param msm8953_apss_foundry_id_param[] = { {37, 40, 42}, {}, }; static const struct cpr3_fuse_param msm8953_cpr_boost_fuse_cfg_param[] = { {36, 43, 45}, {}, }; static const struct cpr3_fuse_param msm8953_apss_boost_fuse_volt_param[] = { {71, 0, 5}, {}, }; static const struct cpr3_fuse_param msm8953_misc_fuse_volt_adj_param[] = { {36, 54, 54}, {}, }; static const struct cpr3_fuse_param msm8953_apss_aging_init_quot_diff_param[] = { {72, 0, 7}, {}, }; /* * The maximum number of fuse combinations possible for the selected fuse * parameters in fuse combo map logic. * Here, possible speed-bin values = 8, fuse revision values = 8, and foundry * identifier values = 8. Total number of combinations = 512 (i.e., 8 * 8 * 8) */ #define CPR4_MSM8953_APSS_FUSE_COMBO_MAP_MAX_COUNT 512 /* * The number of possible values for misc fuse is * 2^(#bits defined for misc fuse) */ #define MSM8953_MISC_FUSE_VAL_COUNT BIT(1) /* * Open loop voltage fuse reference voltages in microvolts for MSM8953 */ static const int msm8953_apss_fuse_ref_volt [MSM8953_APSS_FUSE_CORNERS] = { 645000, 720000, 865000, 1065000, }; #define MSM8953_APSS_FUSE_STEP_VOLT 10000 #define MSM8953_APSS_VOLTAGE_FUSE_SIZE 6 #define MSM8953_APSS_QUOT_OFFSET_SCALE 5 #define MSM8953_APSS_CPR_SENSOR_COUNT 13 #define MSM8953_APSS_CPR_CLOCK_RATE 19200000 #define MSM8953_APSS_MAX_TEMP_POINTS 3 #define MSM8953_APSS_TEMP_SENSOR_ID_START 4 #define MSM8953_APSS_TEMP_SENSOR_ID_END 13 /* * Boost voltage fuse reference and ceiling voltages in microvolts for * MSM8953. */ #define MSM8953_APSS_BOOST_FUSE_REF_VOLT 1140000 #define MSM8953_APSS_BOOST_CEILING_VOLT 1140000 #define MSM8953_APSS_BOOST_FLOOR_VOLT 900000 #define MAX_BOOST_CONFIG_FUSE_VALUE 8 #define MSM8953_APSS_CPR_SDELTA_CORE_COUNT 15 /* * Array of integer values mapped to each of the boost config fuse values to * indicate boost enable/disable status. */ static bool boost_fuse[MAX_BOOST_CONFIG_FUSE_VALUE] = {0, 1, 1, 1, 1, 1, 1, 1}; /* CPR Aging parameters for msm8953 */ #define MSM8953_APSS_AGING_INIT_QUOT_DIFF_SCALE 1 #define MSM8953_APSS_AGING_INIT_QUOT_DIFF_SIZE 8 #define MSM8953_APSS_AGING_SENSOR_ID 6 /* Use a very high value for max aging margin to be applied */ #define MSM8953_APSS_AGING_MAX_AGE_MARGIN_QUOT (-1000) /** * cpr4_msm8953_apss_read_fuse_data() - load APSS specific fuse parameter values * @vreg: Pointer to the CPR3 regulator * * This function allocates a cpr4_msm8953_apss_fuses struct, fills it with * values read out of hardware fuses, and finally copies common fuse values * into the CPR3 regulator struct. * * Return: 0 on success, errno on failure */ static int cpr4_msm8953_apss_read_fuse_data(struct cpr3_regulator *vreg) { void __iomem *base = vreg->thread->ctrl->fuse_base; struct cpr4_msm8953_apss_fuses *fuse; int i, rc; fuse = devm_kzalloc(vreg->thread->ctrl->dev, sizeof(*fuse), GFP_KERNEL); if (!fuse) return -ENOMEM; rc = cpr3_read_fuse_param(base, msm8953_apss_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, msm8953_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, msm8953_apss_foundry_id_param, &fuse->foundry_id); if (rc) { cpr3_err(vreg, "Unable to read foundry id fuse, rc=%d\n", rc); return rc; } cpr3_info(vreg, "foundry id = %llu\n", fuse->foundry_id); rc = cpr3_read_fuse_param(base, msm8953_misc_fuse_volt_adj_param, &fuse->misc); if (rc) { cpr3_err(vreg, "Unable to read misc voltage adjustment fuse, rc=%d\n", rc); return rc; } cpr3_info(vreg, "CPR misc fuse value = %llu\n", fuse->misc); if (fuse->misc >= MSM8953_MISC_FUSE_VAL_COUNT) { cpr3_err(vreg, "CPR misc fuse value = %llu, should be < %lu\n", fuse->misc, MSM8953_MISC_FUSE_VAL_COUNT); return -EINVAL; } rc = cpr3_read_fuse_param(base, msm8953_apss_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 < MSM8953_APSS_FUSE_CORNERS; i++) { rc = cpr3_read_fuse_param(base, msm8953_apss_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, msm8953_apss_target_quot_param[i], &fuse->target_quot[i]); if (rc) { cpr3_err(vreg, "Unable to read fuse-corner %d target quotient fuse, rc=%d\n", i, rc); return rc; } rc = cpr3_read_fuse_param(base, msm8953_apss_ro_sel_param[i], &fuse->ro_sel[i]); if (rc) { cpr3_err(vreg, "Unable to read fuse-corner %d RO select fuse, rc=%d\n", i, rc); return rc; } rc = cpr3_read_fuse_param(base, msm8953_apss_quot_offset_param[i], &fuse->quot_offset[i]); if (rc) { cpr3_err(vreg, "Unable to read fuse-corner %d quotient offset fuse, rc=%d\n", i, rc); return rc; } } rc = cpr3_read_fuse_param(base, msm8953_cpr_boost_fuse_cfg_param, &fuse->boost_cfg); if (rc) { cpr3_err(vreg, "Unable to read CPR boost config fuse, rc=%d\n", rc); return rc; } cpr3_info(vreg, "Voltage boost fuse config = %llu boost = %s\n", fuse->boost_cfg, boost_fuse[fuse->boost_cfg] ? "enable" : "disable"); rc = cpr3_read_fuse_param(base, msm8953_apss_boost_fuse_volt_param, &fuse->boost_voltage); if (rc) { cpr3_err(vreg, "failed to read boost fuse voltage, rc=%d\n", rc); return rc; } vreg->fuse_combo = fuse->cpr_fusing_rev + 8 * fuse->speed_bin; if (vreg->fuse_combo >= CPR4_MSM8953_APSS_FUSE_COMBO_COUNT) { cpr3_err(vreg, "invalid CPR fuse combo = %d found\n", vreg->fuse_combo); return -EINVAL; } vreg->speed_bin_fuse = fuse->speed_bin; vreg->cpr_rev_fuse = fuse->cpr_fusing_rev; vreg->fuse_corner_count = MSM8953_APSS_FUSE_CORNERS; vreg->platform_fuses = fuse; return 0; } /** * cpr4_apss_parse_corner_data() - parse APSS corner data from device tree * properties of the CPR3 regulator's device node * @vreg: Pointer to the CPR3 regulator * * Return: 0 on success, errno on failure */ static int cpr4_apss_parse_corner_data(struct cpr3_regulator *vreg) { int rc; rc = cpr3_parse_common_corner_data(vreg); if (rc) { cpr3_err(vreg, "error reading corner data, rc=%d\n", rc); return rc; } return rc; } /** * cpr4_apss_parse_misc_fuse_voltage_adjustments() - fill an array from a * portion of the voltage adjustments specified based on * miscellaneous fuse bits. * @vreg: Pointer to the CPR3 regulator * @volt_adjust: Voltage adjustment output data array which must be * of size vreg->corner_count * * cpr3_parse_common_corner_data() must be called for vreg before this function * is called so that speed bin size elements are initialized. * * Two formats are supported for the device tree property: * 1. Length == tuple_list_size * vreg->corner_count * (reading begins at index 0) * 2. Length == tuple_list_size * vreg->speed_bin_corner_sum * (reading begins at index tuple_list_size * vreg->speed_bin_offset) * * Here, tuple_list_size is the number of possible values for misc fuse. * All other property lengths are treated as errors. * * Return: 0 on success, errno on failure */ static int cpr4_apss_parse_misc_fuse_voltage_adjustments( struct cpr3_regulator *vreg, u32 *volt_adjust) { struct device_node *node = vreg->of_node; struct cpr4_msm8953_apss_fuses *fuse = vreg->platform_fuses; int tuple_list_size = MSM8953_MISC_FUSE_VAL_COUNT; int i, offset, rc, len = 0; const char *prop_name = "qcom,cpr-misc-fuse-voltage-adjustment"; if (!of_find_property(node, prop_name, &len)) { cpr3_err(vreg, "property %s is missing\n", prop_name); return -EINVAL; } if (len == tuple_list_size * vreg->corner_count * sizeof(u32)) { offset = 0; } else if (vreg->speed_bin_corner_sum > 0 && len == tuple_list_size * vreg->speed_bin_corner_sum * sizeof(u32)) { offset = tuple_list_size * vreg->speed_bin_offset + fuse->misc * vreg->corner_count; } else { if (vreg->speed_bin_corner_sum > 0) cpr3_err(vreg, "property %s has invalid length=%d, should be %zu or %zu\n", prop_name, len, tuple_list_size * vreg->corner_count * sizeof(u32), tuple_list_size * vreg->speed_bin_corner_sum * sizeof(u32)); else cpr3_err(vreg, "property %s has invalid length=%d, should be %zu\n", prop_name, len, tuple_list_size * vreg->corner_count * sizeof(u32)); return -EINVAL; } for (i = 0; i < vreg->corner_count; i++) { rc = of_property_read_u32_index(node, prop_name, offset + i, &volt_adjust[i]); if (rc) { cpr3_err(vreg, "error reading property %s, rc=%d\n", prop_name, rc); return rc; } } return 0; } /** * cpr4_msm8953_apss_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 device tree, 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 cpr4_msm8953_apss_calculate_open_loop_voltages( struct cpr3_regulator *vreg) { struct device_node *node = vreg->of_node; struct cpr4_msm8953_apss_fuses *fuse = vreg->platform_fuses; int i, j, rc = 0; bool allow_interpolation; u64 freq_low, volt_low, freq_high, volt_high; int *fuse_volt, *misc_adj_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; } for (i = 0; i < vreg->fuse_corner_count; i++) { fuse_volt[i] = cpr3_convert_open_loop_voltage_fuse( msm8953_apss_fuse_ref_volt[i], MSM8953_APSS_FUSE_STEP_VOLT, fuse->init_voltage[i], MSM8953_APSS_VOLTAGE_FUSE_SIZE); /* Log fused open-loop voltage values for debugging purposes. */ cpr3_info(vreg, "fused %8s: open-loop=%7d uV\n", cpr4_msm8953_apss_fuse_corner_name[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_info(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 (!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); if (of_find_property(node, "qcom,cpr-misc-fuse-voltage-adjustment", NULL)) { misc_adj_volt = kcalloc(vreg->corner_count, sizeof(*misc_adj_volt), GFP_KERNEL); if (!misc_adj_volt) { rc = -ENOMEM; goto _exit; } rc = cpr4_apss_parse_misc_fuse_voltage_adjustments(vreg, misc_adj_volt); if (rc) { cpr3_err(vreg, "qcom,cpr-misc-fuse-voltage-adjustment reading failed, rc=%d\n", rc); kfree(misc_adj_volt); goto _exit; } for (i = 0; i < vreg->corner_count; i++) vreg->corner[i].open_loop_volt += misc_adj_volt[i]; kfree(misc_adj_volt); } } _exit: kfree(fuse_volt); kfree(fmax_corner); return rc; } /** * cpr4_msm8953_apss_set_no_interpolation_quotients() - use the fused target * quotient values for lower frequencies. * @vreg: Pointer to the CPR3 regulator * @volt_adjust: Pointer to array of per-corner closed-loop adjustment * voltages * @volt_adjust_fuse: Pointer to array of per-fuse-corner closed-loop * adjustment voltages * @ro_scale: Pointer to array of per-fuse-corner RO scaling factor * values with units of QUOT/V * * Return: 0 on success, errno on failure */ static int cpr4_msm8953_apss_set_no_interpolation_quotients( struct cpr3_regulator *vreg, int *volt_adjust, int *volt_adjust_fuse, int *ro_scale) { struct cpr4_msm8953_apss_fuses *fuse = vreg->platform_fuses; u32 quot, ro; int quot_adjust; int i, fuse_corner; for (i = 0; i < vreg->corner_count; i++) { fuse_corner = vreg->corner[i].cpr_fuse_corner; quot = fuse->target_quot[fuse_corner]; quot_adjust = cpr3_quot_adjustment(ro_scale[fuse_corner], volt_adjust_fuse[fuse_corner] + volt_adjust[i]); ro = fuse->ro_sel[fuse_corner]; vreg->corner[i].target_quot[ro] = quot + quot_adjust; cpr3_debug(vreg, "corner=%d RO=%u target quot=%u\n", i, ro, quot); if (quot_adjust) cpr3_debug(vreg, "adjusted corner %d RO%u target quot: %u --> %u (%d uV)\n", i, ro, quot, vreg->corner[i].target_quot[ro], volt_adjust_fuse[fuse_corner] + volt_adjust[i]); } return 0; } /** * cpr4_msm8953_apss_calculate_target_quotients() - calculate the CPR target * quotient for each corner of a CPR3 regulator * @vreg: Pointer to the CPR3 regulator * * If target quotient interpolation is allowed in device tree, then this * function calculates the target quotient for a given corner using linear * interpolation. This interpolation is performed using the processor * frequencies of the lower and higher Fmax corners along with the fused * target quotient and quotient offset of the higher Fmax corner. * * If target quotient interpolation is not allowed, then this function uses * the Fmax fused target quotient for all of the corners associated with a * given fuse corner. * * Return: 0 on success, errno on failure */ static int cpr4_msm8953_apss_calculate_target_quotients( struct cpr3_regulator *vreg) { struct cpr4_msm8953_apss_fuses *fuse = vreg->platform_fuses; int rc; bool allow_interpolation; u64 freq_low, freq_high, prev_quot; u64 *quot_low; u64 *quot_high; u32 quot, ro; int i, j, fuse_corner, quot_adjust; int *fmax_corner; int *volt_adjust, *volt_adjust_fuse, *ro_scale; int *voltage_adj_misc; /* Log fused quotient values for debugging purposes. */ cpr3_info(vreg, "fused LowSVS: quot[%2llu]=%4llu\n", fuse->ro_sel[CPR4_MSM8953_APSS_FUSE_CORNER_LOWSVS], fuse->target_quot[CPR4_MSM8953_APSS_FUSE_CORNER_LOWSVS]); for (i = CPR4_MSM8953_APSS_FUSE_CORNER_SVS; i <= CPR4_MSM8953_APSS_FUSE_CORNER_TURBO_L1; i++) cpr3_info(vreg, "fused %8s: quot[%2llu]=%4llu, quot_offset[%2llu]=%4llu\n", cpr4_msm8953_apss_fuse_corner_name[i], fuse->ro_sel[i], fuse->target_quot[i], fuse->ro_sel[i], fuse->quot_offset[i] * MSM8953_APSS_QUOT_OFFSET_SCALE); allow_interpolation = of_property_read_bool(vreg->of_node, "qcom,allow-quotient-interpolation"); volt_adjust = kcalloc(vreg->corner_count, sizeof(*volt_adjust), GFP_KERNEL); volt_adjust_fuse = kcalloc(vreg->fuse_corner_count, sizeof(*volt_adjust_fuse), GFP_KERNEL); ro_scale = kcalloc(vreg->fuse_corner_count, sizeof(*ro_scale), GFP_KERNEL); fmax_corner = kcalloc(vreg->fuse_corner_count, sizeof(*fmax_corner), GFP_KERNEL); quot_low = kcalloc(vreg->fuse_corner_count, sizeof(*quot_low), GFP_KERNEL); quot_high = kcalloc(vreg->fuse_corner_count, sizeof(*quot_high), GFP_KERNEL); if (!volt_adjust || !volt_adjust_fuse || !ro_scale || !fmax_corner || !quot_low || !quot_high) { rc = -ENOMEM; goto done; } rc = cpr3_parse_closed_loop_voltage_adjustments(vreg, &fuse->ro_sel[0], volt_adjust, volt_adjust_fuse, ro_scale); if (rc) { cpr3_err(vreg, "could not load closed-loop voltage adjustments, rc=%d\n", rc); goto done; } if (of_find_property(vreg->of_node, "qcom,cpr-misc-fuse-voltage-adjustment", NULL)) { voltage_adj_misc = kcalloc(vreg->corner_count, sizeof(*voltage_adj_misc), GFP_KERNEL); if (!voltage_adj_misc) { rc = -ENOMEM; goto done; } rc = cpr4_apss_parse_misc_fuse_voltage_adjustments(vreg, voltage_adj_misc); if (rc) { cpr3_err(vreg, "qcom,cpr-misc-fuse-voltage-adjustment reading failed, rc=%d\n", rc); kfree(voltage_adj_misc); goto done; } for (i = 0; i < vreg->corner_count; i++) volt_adjust[i] += voltage_adj_misc[i]; kfree(voltage_adj_misc); } if (!allow_interpolation) { /* Use fused target quotients for lower frequencies. */ return cpr4_msm8953_apss_set_no_interpolation_quotients( vreg, volt_adjust, volt_adjust_fuse, ro_scale); } /* 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. */ i = CPR4_MSM8953_APSS_FUSE_CORNER_LOWSVS; quot_adjust = cpr3_quot_adjustment(ro_scale[i], volt_adjust_fuse[i]); quot = fuse->target_quot[i] + quot_adjust; quot_high[i] = quot_low[i] = quot; ro = fuse->ro_sel[i]; if (quot_adjust) cpr3_debug(vreg, "adjusted fuse corner %d RO%u target quot: %llu --> %u (%d uV)\n", i, ro, fuse->target_quot[i], quot, volt_adjust_fuse[i]); for (i = 0; i <= fmax_corner[CPR4_MSM8953_APSS_FUSE_CORNER_LOWSVS]; i++) vreg->corner[i].target_quot[ro] = quot; for (i = CPR4_MSM8953_APSS_FUSE_CORNER_SVS; i < vreg->fuse_corner_count; i++) { quot_high[i] = fuse->target_quot[i]; if (fuse->ro_sel[i] == fuse->ro_sel[i - 1]) quot_low[i] = quot_high[i - 1]; else quot_low[i] = quot_high[i] - fuse->quot_offset[i] * MSM8953_APSS_QUOT_OFFSET_SCALE; if (quot_high[i] < quot_low[i]) { cpr3_debug(vreg, "quot_high[%d]=%llu < quot_low[%d]=%llu; overriding: quot_high[%d]=%llu\n", i, quot_high[i], i, quot_low[i], i, quot_low[i]); quot_high[i] = quot_low[i]; } } /* Perform per-fuse-corner target quotient adjustment */ for (i = 1; i < vreg->fuse_corner_count; i++) { quot_adjust = cpr3_quot_adjustment(ro_scale[i], volt_adjust_fuse[i]); if (quot_adjust) { prev_quot = quot_high[i]; quot_high[i] += quot_adjust; cpr3_debug(vreg, "adjusted fuse corner %d RO%llu target quot: %llu --> %llu (%d uV)\n", i, fuse->ro_sel[i], prev_quot, quot_high[i], volt_adjust_fuse[i]); } if (fuse->ro_sel[i] == fuse->ro_sel[i - 1]) quot_low[i] = quot_high[i - 1]; else quot_low[i] += cpr3_quot_adjustment(ro_scale[i], volt_adjust_fuse[i - 1]); if (quot_high[i] < quot_low[i]) { cpr3_debug(vreg, "quot_high[%d]=%llu < quot_low[%d]=%llu after adjustment; overriding: quot_high[%d]=%llu\n", i, quot_high[i], i, quot_low[i], i, quot_low[i]); quot_high[i] = quot_low[i]; } } /* 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; freq_high = vreg->corner[fmax_corner[i]].proc_freq; ro = fuse->ro_sel[i]; for (j = fmax_corner[i - 1] + 1; j <= fmax_corner[i]; j++) vreg->corner[j].target_quot[ro] = cpr3_interpolate( freq_low, quot_low[i], freq_high, quot_high[i], vreg->corner[j].proc_freq); } /* Perform per-corner target quotient adjustment */ for (i = 0; i < vreg->corner_count; i++) { fuse_corner = vreg->corner[i].cpr_fuse_corner; ro = fuse->ro_sel[fuse_corner]; quot_adjust = cpr3_quot_adjustment(ro_scale[fuse_corner], volt_adjust[i]); if (quot_adjust) { prev_quot = vreg->corner[i].target_quot[ro]; vreg->corner[i].target_quot[ro] += quot_adjust; cpr3_debug(vreg, "adjusted corner %d RO%u target quot: %llu --> %u (%d uV)\n", i, ro, prev_quot, vreg->corner[i].target_quot[ro], volt_adjust[i]); } } /* Ensure that target quotients increase monotonically */ for (i = 1; i < vreg->corner_count; i++) { ro = fuse->ro_sel[vreg->corner[i].cpr_fuse_corner]; if (fuse->ro_sel[vreg->corner[i - 1].cpr_fuse_corner] == ro && vreg->corner[i].target_quot[ro] < vreg->corner[i - 1].target_quot[ro]) { cpr3_debug(vreg, "adjusted corner %d RO%u target quot=%u < adjusted corner %d RO%u target quot=%u; overriding: corner %d RO%u target quot=%u\n", i, ro, vreg->corner[i].target_quot[ro], i - 1, ro, vreg->corner[i - 1].target_quot[ro], i, ro, vreg->corner[i - 1].target_quot[ro]); vreg->corner[i].target_quot[ro] = vreg->corner[i - 1].target_quot[ro]; } } done: kfree(volt_adjust); kfree(volt_adjust_fuse); kfree(ro_scale); kfree(fmax_corner); kfree(quot_low); kfree(quot_high); return rc; } /** * cpr4_apss_print_settings() - print out APSS CPR configuration settings into * the kernel log for debugging purposes * @vreg: Pointer to the CPR3 regulator */ static void cpr4_apss_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); } if (vreg->thread->ctrl->apm) cpr3_debug(vreg, "APM threshold = %d uV, APM adjust = %d uV\n", vreg->thread->ctrl->apm_threshold_volt, vreg->thread->ctrl->apm_adj_volt); } /** * cpr4_apss_init_thread() - perform 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 cpr4_apss_init_thread(struct cpr3_thread *thread) { int rc; rc = cpr3_parse_common_thread_data(thread); if (rc) { cpr3_err(thread->ctrl, "thread %u unable to read CPR thread data from device tree, rc=%d\n", thread->thread_id, rc); return rc; } return 0; } /** * cpr4_apss_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_apss_parse_temp_adj_properties(struct cpr3_controller *ctrl) { struct device_node *of_node = ctrl->dev->of_node; int rc, i, len, temp_point_count; if (!of_find_property(of_node, "qcom,cpr-temp-point-map", &len)) { /* * Temperature based adjustments are not defined. Single * temperature band is still valid for per-online-core * adjustments. */ ctrl->temp_band_count = 1; return 0; } temp_point_count = len / sizeof(u32); if (temp_point_count <= 0 || temp_point_count > MSM8953_APSS_MAX_TEMP_POINTS) { cpr3_err(ctrl, "invalid number of temperature points %d > %d (max)\n", temp_point_count, MSM8953_APSS_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; } for (i = 0; i < temp_point_count; i++) cpr3_debug(ctrl, "Temperature Point %d=%d\n", i, ctrl->temp_points[i]); /* * 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; cpr3_debug(ctrl, "Number of temp bands =%d\n", ctrl->temp_band_count); 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 = MSM8953_APSS_TEMP_SENSOR_ID_START; ctrl->temp_sensor_id_end = MSM8953_APSS_TEMP_SENSOR_ID_END; ctrl->allow_temp_adj = true; return rc; } /** * cpr4_apss_parse_boost_properties() - parse configuration data for boost * voltage adjustment for CPR3 regulator from device tree. * @vreg: Pointer to the CPR3 regulator * * Return: 0 on success, errno on failure */ static int cpr4_apss_parse_boost_properties(struct cpr3_regulator *vreg) { struct cpr3_controller *ctrl = vreg->thread->ctrl; struct cpr4_msm8953_apss_fuses *fuse = vreg->platform_fuses; struct cpr3_corner *corner; int i, boost_voltage, final_boost_volt, rc = 0; int *boost_table = NULL, *boost_temp_adj = NULL; int boost_voltage_adjust = 0, boost_num_cores = 0; u32 boost_allowed = 0; if (!boost_fuse[fuse->boost_cfg]) /* Voltage boost is disabled in fuse */ return 0; if (of_find_property(vreg->of_node, "qcom,allow-boost", NULL)) { rc = cpr3_parse_array_property(vreg, "qcom,allow-boost", 1, &boost_allowed); if (rc) return rc; } if (!boost_allowed) { /* Voltage boost is not enabled for this regulator */ return 0; } boost_voltage = cpr3_convert_open_loop_voltage_fuse( MSM8953_APSS_BOOST_FUSE_REF_VOLT, MSM8953_APSS_FUSE_STEP_VOLT, fuse->boost_voltage, MSM8953_APSS_VOLTAGE_FUSE_SIZE); /* Log boost voltage value for debugging purposes. */ cpr3_info(vreg, "Boost open-loop=%7d uV\n", boost_voltage); if (of_find_property(vreg->of_node, "qcom,cpr-boost-voltage-fuse-adjustment", NULL)) { rc = cpr3_parse_array_property(vreg, "qcom,cpr-boost-voltage-fuse-adjustment", 1, &boost_voltage_adjust); if (rc) { cpr3_err(vreg, "qcom,cpr-boost-voltage-fuse-adjustment reading failed, rc=%d\n", rc); return rc; } boost_voltage += boost_voltage_adjust; /* Log boost voltage value for debugging purposes. */ cpr3_info(vreg, "Adjusted boost open-loop=%7d uV\n", boost_voltage); } /* Limit boost voltage value between ceiling and floor voltage limits */ boost_voltage = min(boost_voltage, MSM8953_APSS_BOOST_CEILING_VOLT); boost_voltage = max(boost_voltage, MSM8953_APSS_BOOST_FLOOR_VOLT); /* * The boost feature can only be used for the highest voltage corner. * Also, keep core-count adjustments disabled when the boost feature * is enabled. */ corner = &vreg->corner[vreg->corner_count - 1]; if (!corner->sdelta) { /* * If core-count/temp adjustments are not defined, the cpr4 * sdelta for this corner will not be allocated. Allocate it * here for boost configuration. */ corner->sdelta = devm_kzalloc(ctrl->dev, sizeof(*corner->sdelta), GFP_KERNEL); if (!corner->sdelta) return -ENOMEM; } corner->sdelta->temp_band_count = ctrl->temp_band_count; rc = of_property_read_u32(vreg->of_node, "qcom,cpr-num-boost-cores", &boost_num_cores); if (rc) { cpr3_err(vreg, "qcom,cpr-num-boost-cores reading failed, rc=%d\n", rc); return rc; } if (boost_num_cores <= 0 || boost_num_cores > MSM8953_APSS_CPR_SDELTA_CORE_COUNT) { cpr3_err(vreg, "Invalid boost number of cores = %d\n", boost_num_cores); return -EINVAL; } corner->sdelta->boost_num_cores = boost_num_cores; boost_table = devm_kcalloc(ctrl->dev, corner->sdelta->temp_band_count, sizeof(*boost_table), GFP_KERNEL); if (!boost_table) return -ENOMEM; if (of_find_property(vreg->of_node, "qcom,cpr-boost-temp-adjustment", NULL)) { boost_temp_adj = kcalloc(corner->sdelta->temp_band_count, sizeof(*boost_temp_adj), GFP_KERNEL); if (!boost_temp_adj) return -ENOMEM; rc = cpr3_parse_array_property(vreg, "qcom,cpr-boost-temp-adjustment", corner->sdelta->temp_band_count, boost_temp_adj); if (rc) { cpr3_err(vreg, "qcom,cpr-boost-temp-adjustment reading failed, rc=%d\n", rc); goto done; } } for (i = 0; i < corner->sdelta->temp_band_count; i++) { /* Apply static adjustments to boost voltage */ final_boost_volt = boost_voltage + (boost_temp_adj == NULL ? 0 : boost_temp_adj[i]); /* * Limit final adjusted boost voltage value between ceiling * and floor voltage limits */ final_boost_volt = min(final_boost_volt, MSM8953_APSS_BOOST_CEILING_VOLT); final_boost_volt = max(final_boost_volt, MSM8953_APSS_BOOST_FLOOR_VOLT); boost_table[i] = (corner->open_loop_volt - final_boost_volt) / ctrl->step_volt; cpr3_debug(vreg, "Adjusted boost voltage margin for temp band %d = %d steps\n", i, boost_table[i]); } corner->ceiling_volt = MSM8953_APSS_BOOST_CEILING_VOLT; corner->sdelta->boost_table = boost_table; corner->sdelta->allow_boost = true; corner->sdelta->allow_core_count_adj = false; vreg->allow_boost = true; ctrl->allow_boost = true; done: kfree(boost_temp_adj); return rc; } /* * Constants which define the selection fuse parameters used in fuse combo map * logic. */ enum cpr4_msm8953_apss_fuse_combo_parameters { MSM8953_APSS_SPEED_BIN = 0, MSM8953_APSS_CPR_FUSE_REV, MSM8953_APSS_FOUNDRY_ID, MSM8953_APSS_FUSE_COMBO_PARAM_COUNT, }; /** * cpr4_parse_fuse_combo_map() - parse APSS fuse combo map data from device tree * properties of the CPR3 regulator's device node * @vreg: Pointer to the CPR3 regulator * * Return: 0 on success, errno on failure */ static int cpr4_parse_fuse_combo_map(struct cpr3_regulator *vreg) { struct cpr4_msm8953_apss_fuses *fuse = vreg->platform_fuses; u64 *fuse_val; int rc; fuse_val = kcalloc(MSM8953_APSS_FUSE_COMBO_PARAM_COUNT, sizeof(*fuse_val), GFP_KERNEL); if (!fuse_val) return -ENOMEM; fuse_val[MSM8953_APSS_SPEED_BIN] = fuse->speed_bin; fuse_val[MSM8953_APSS_CPR_FUSE_REV] = fuse->cpr_fusing_rev; fuse_val[MSM8953_APSS_FOUNDRY_ID] = fuse->foundry_id; rc = cpr3_parse_fuse_combo_map(vreg, fuse_val, MSM8953_APSS_FUSE_COMBO_PARAM_COUNT); if (rc == -ENODEV) { cpr3_debug(vreg, "using legacy fuse combo logic, rc=%d\n", rc); rc = 0; } else if (rc < 0) { cpr3_err(vreg, "error reading fuse combo map data, rc=%d\n", rc); } else if (vreg->fuse_combo >= CPR4_MSM8953_APSS_FUSE_COMBO_MAP_MAX_COUNT) { cpr3_err(vreg, "invalid CPR fuse combo = %d found\n", vreg->fuse_combo); rc = -EINVAL; } kfree(fuse_val); return rc; } /** * cpr4_apss_init_regulator() - perform all steps necessary to initialize the * configuration data for a CPR3 regulator * @vreg: Pointer to the CPR3 regulator * * Return: 0 on success, errno on failure */ static int cpr4_apss_init_regulator(struct cpr3_regulator *vreg) { struct cpr4_msm8953_apss_fuses *fuse; int rc; rc = cpr4_msm8953_apss_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; rc = cpr4_parse_fuse_combo_map(vreg); if (rc) { cpr3_err(vreg, "error while parsing fuse combo map, rc=%d\n", rc); return rc; } rc = cpr4_apss_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_mem_acc_init(vreg); if (rc) { if (rc != -EPROBE_DEFER) cpr3_err(vreg, "unable to initialize mem-acc regulator settings, rc=%d\n", rc); return rc; } rc = cpr4_msm8953_apss_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; } rc = cpr4_msm8953_apss_calculate_target_quotients(vreg); if (rc) { cpr3_err(vreg, "unable to calculate target quotients, rc=%d\n", rc); return rc; } rc = cpr4_parse_core_count_temp_voltage_adj(vreg, false); if (rc) { cpr3_err(vreg, "unable to parse temperature and core count voltage adjustments, rc=%d\n", rc); return rc; } if (vreg->allow_core_count_adj && (vreg->max_core_count <= 0 || vreg->max_core_count > MSM8953_APSS_CPR_SDELTA_CORE_COUNT)) { cpr3_err(vreg, "qcom,max-core-count has invalid value = %d\n", vreg->max_core_count); return -EINVAL; } rc = cpr4_apss_parse_boost_properties(vreg); if (rc) { cpr3_err(vreg, "unable to parse boost adjustments, rc=%d\n", rc); return rc; } cpr4_apss_print_settings(vreg); return rc; } /** * cpr4_apss_init_aging() - perform APSS CPR4 controller specific * aging initializations * @ctrl: Pointer to the CPR3 controller * * Return: 0 on success, errno on failure */ static int cpr4_apss_init_aging(struct cpr3_controller *ctrl) { struct cpr4_msm8953_apss_fuses *fuse = NULL; struct cpr3_regulator *vreg; u32 aging_ro_scale; int i, j, rc; for (i = 0; i < ctrl->thread_count; i++) { for (j = 0; j < ctrl->thread[i].vreg_count; j++) { if (ctrl->thread[i].vreg[j].aging_allowed) { ctrl->aging_required = true; vreg = &ctrl->thread[i].vreg[j]; fuse = vreg->platform_fuses; break; } } } 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->sensor_id = MSM8953_APSS_AGING_SENSOR_ID; ctrl->aging_sensor->ro_scale = aging_ro_scale; ctrl->aging_sensor->init_quot_diff = cpr3_convert_open_loop_voltage_fuse(0, MSM8953_APSS_AGING_INIT_QUOT_DIFF_SCALE, fuse->aging_init_quot_diff, MSM8953_APSS_AGING_INIT_QUOT_DIFF_SIZE); if (ctrl->aging_sensor->init_quot_diff == 0) { /* * Initial quotient difference value '0' has a special meaning * in MSM8953 fusing scheme. Use max age margin quotient * difference to consider full aging margin of 15 mV. */ ctrl->aging_sensor->init_quot_diff = MSM8953_APSS_AGING_MAX_AGE_MARGIN_QUOT; cpr3_debug(ctrl, "Init quotient diff = 0, use max age margin quotient\n"); } cpr3_info(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; } /** * cpr4_apss_init_controller() - perform APSS CPR4 controller specific * initializations * @ctrl: Pointer to the CPR3 controller * * Return: 0 on success, errno on failure */ static int cpr4_apss_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; } rc = of_property_read_u32(ctrl->dev->of_node, "qcom,cpr-down-error-step-limit", &ctrl->down_error_step_limit); if (rc) { cpr3_err(ctrl, "error reading qcom,cpr-down-error-step-limit, rc=%d\n", rc); return rc; } rc = of_property_read_u32(ctrl->dev->of_node, "qcom,cpr-up-error-step-limit", &ctrl->up_error_step_limit); if (rc) { cpr3_err(ctrl, "error reading qcom,cpr-up-error-step-limit, rc=%d\n", rc); return rc; } /* * 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 ? false : true; ctrl->saw_use_unit_mV = of_property_read_bool(ctrl->dev->of_node, "qcom,cpr-saw-use-unit-mV"); of_property_read_u32(ctrl->dev->of_node, "qcom,cpr-voltage-settling-time", &ctrl->voltage_settling_time); ctrl->vdd_limit_regulator = devm_regulator_get(ctrl->dev, "vdd-limit"); if (IS_ERR(ctrl->vdd_limit_regulator)) { rc = PTR_ERR(ctrl->vdd_limit_regulator); if (rc != -EPROBE_DEFER) cpr3_err(ctrl, "unable to request vdd-limit regulator, rc=%d\n", rc); return rc; } rc = cpr3_apm_init(ctrl); if (rc) { if (rc != -EPROBE_DEFER) cpr3_err(ctrl, "unable to initialize APM settings, rc=%d\n", rc); return rc; } rc = cpr4_apss_parse_temp_adj_properties(ctrl); if (rc) { cpr3_err(ctrl, "unable to parse temperature adjustment properties, rc=%d\n", rc); return rc; } ctrl->sensor_count = MSM8953_APSS_CPR_SENSOR_COUNT; /* * APSS only has one thread (0) per controller 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 = MSM8953_APSS_CPR_CLOCK_RATE; ctrl->ctrl_type = CPR_CTRL_TYPE_CPR4; ctrl->supports_hw_closed_loop = true; ctrl->use_hw_closed_loop = of_property_read_bool(ctrl->dev->of_node, "qcom,cpr-hw-closed-loop"); return 0; } static int cpr4_apss_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 cpr4_apss_regulator_resume(struct platform_device *pdev) { struct cpr3_controller *ctrl = platform_get_drvdata(pdev); return cpr3_regulator_resume(ctrl); } static int cpr4_apss_regulator_probe(struct platform_device *pdev) { struct device *dev = &pdev->dev; struct cpr3_controller *ctrl; int i, 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; } 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; } rc = cpr4_apss_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 = cpr4_apss_init_thread(&ctrl->thread[0]); if (rc) { cpr3_err(ctrl, "thread initialization failed, rc=%d\n", rc); return rc; } for (i = 0; i < ctrl->thread[0].vreg_count; i++) { rc = cpr4_apss_init_regulator(&ctrl->thread[0].vreg[i]); if (rc) { cpr3_err(&ctrl->thread[0].vreg[i], "regulator initialization failed, rc=%d\n", rc); return rc; } } rc = cpr4_apss_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 cpr4_apss_regulator_remove(struct platform_device *pdev) { struct cpr3_controller *ctrl = platform_get_drvdata(pdev); return cpr3_regulator_unregister(ctrl); } static struct of_device_id cpr4_regulator_match_table[] = { { .compatible = "qcom,cpr4-msm8953-apss-regulator", }, {} }; static struct platform_driver cpr4_apss_regulator_driver = { .driver = { .name = "qcom,cpr4-apss-regulator", .of_match_table = cpr4_regulator_match_table, .owner = THIS_MODULE, }, .probe = cpr4_apss_regulator_probe, .remove = cpr4_apss_regulator_remove, .suspend = cpr4_apss_regulator_suspend, .resume = cpr4_apss_regulator_resume, }; static int cpr4_regulator_init(void) { return platform_driver_register(&cpr4_apss_regulator_driver); } static void cpr4_regulator_exit(void) { platform_driver_unregister(&cpr4_apss_regulator_driver); } MODULE_DESCRIPTION("CPR4 APSS regulator driver"); MODULE_LICENSE("GPL v2"); arch_initcall(cpr4_regulator_init); module_exit(cpr4_regulator_exit);