| /* |
| * Copyright (c) 2016-2017, 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 <linux/regulator/msm-ldo-regulator.h> |
| |
| #include "cpr3-regulator.h" |
| |
| #define SDM660_MMSS_FUSE_CORNERS 6 |
| |
| /** |
| * struct cpr4_sdm660_mmss_fuses - MMSS specific fuse data for SDM660 |
| * @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) |
| * @cpr_fusing_rev: CPR fusing revision fuse parameter value |
| * @ldo_enable: The ldo enable fuse parameter for each fuse corner |
| * indicates that VDD_GFX can be configured to LDO mode in |
| * the corresponding fuse corner. |
| * @ldo_cpr_cl_enable: A fuse parameter indicates that GFX CPR can be |
| * configured to operate in closed-loop mode when VDD_GFX |
| * is configured for LDO sub-regulated mode. |
| * |
| * This struct holds the values for all of the fuses read from memory. |
| */ |
| struct cpr4_sdm660_mmss_fuses { |
| u64 init_voltage[SDM660_MMSS_FUSE_CORNERS]; |
| u64 offset_voltage[SDM660_MMSS_FUSE_CORNERS]; |
| u64 cpr_fusing_rev; |
| u64 ldo_enable[SDM660_MMSS_FUSE_CORNERS]; |
| u64 ldo_cpr_cl_enable; |
| }; |
| |
| /* Fuse combos 0 - 7 map to CPR fusing revision 0 - 7 */ |
| #define CPR4_SDM660_MMSS_FUSE_COMBO_COUNT 8 |
| |
| /* |
| * SDM660 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 |
| sdm660_mmss_init_voltage_param[SDM660_MMSS_FUSE_CORNERS][2] = { |
| {{65, 39, 43}, {} }, |
| {{65, 39, 43}, {} }, |
| {{65, 34, 38}, {} }, |
| {{65, 34, 38}, {} }, |
| {{65, 29, 33}, {} }, |
| {{65, 24, 28}, {} }, |
| }; |
| |
| static const struct cpr3_fuse_param sdm660_cpr_fusing_rev_param[] = { |
| {71, 34, 36}, |
| {}, |
| }; |
| |
| static const struct cpr3_fuse_param |
| sdm660_mmss_offset_voltage_param[SDM660_MMSS_FUSE_CORNERS][2] = { |
| {{} }, |
| {{} }, |
| {{} }, |
| {{65, 52, 55}, {} }, |
| {{65, 48, 51}, {} }, |
| {{65, 44, 47}, {} }, |
| }; |
| |
| static const struct cpr3_fuse_param |
| sdm660_mmss_ldo_enable_param[SDM660_MMSS_FUSE_CORNERS][2] = { |
| {{73, 62, 62}, {} }, |
| {{73, 61, 61}, {} }, |
| {{73, 60, 60}, {} }, |
| {{73, 59, 59}, {} }, |
| {{73, 58, 58}, {} }, |
| {{73, 57, 57}, {} }, |
| }; |
| |
| static const struct cpr3_fuse_param sdm660_ldo_cpr_cl_enable_param[] = { |
| {71, 38, 38}, |
| {}, |
| }; |
| |
| /* Additional SDM660 specific data: */ |
| |
| /* Open loop voltage fuse reference voltages in microvolts */ |
| static const int sdm660_mmss_fuse_ref_volt[SDM660_MMSS_FUSE_CORNERS] = { |
| 585000, |
| 645000, |
| 725000, |
| 790000, |
| 870000, |
| 925000, |
| }; |
| |
| #define SDM660_MMSS_FUSE_STEP_VOLT 10000 |
| #define SDM660_MMSS_OFFSET_FUSE_STEP_VOLT 10000 |
| #define SDM660_MMSS_VOLTAGE_FUSE_SIZE 5 |
| |
| #define SDM660_MMSS_CPR_SENSOR_COUNT 11 |
| |
| #define SDM660_MMSS_CPR_CLOCK_RATE 19200000 |
| |
| /** |
| * cpr4_sdm660_mmss_read_fuse_data() - load MMSS specific fuse parameter |
| * values |
| * @vreg: Pointer to the CPR3 regulator |
| * |
| * This function allocates a cpr4_sdm660_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 cpr4_sdm660_mmss_read_fuse_data(struct cpr3_regulator *vreg) |
| { |
| void __iomem *base = vreg->thread->ctrl->fuse_base; |
| struct cpr4_sdm660_mmss_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, sdm660_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, sdm660_ldo_cpr_cl_enable_param, |
| &fuse->ldo_cpr_cl_enable); |
| if (rc) { |
| cpr3_err(vreg, "Unable to read ldo cpr closed-loop enable fuse, rc=%d\n", |
| rc); |
| return rc; |
| } |
| |
| for (i = 0; i < SDM660_MMSS_FUSE_CORNERS; i++) { |
| rc = cpr3_read_fuse_param(base, |
| sdm660_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, |
| sdm660_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; |
| } |
| |
| rc = cpr3_read_fuse_param(base, |
| sdm660_mmss_ldo_enable_param[i], |
| &fuse->ldo_enable[i]); |
| if (rc) { |
| cpr3_err(vreg, "Unable to read fuse-corner %d ldo enable fuse, rc=%d\n", |
| i, rc); |
| return rc; |
| } |
| } |
| |
| vreg->fuse_combo = fuse->cpr_fusing_rev; |
| if (vreg->fuse_combo >= CPR4_SDM660_MMSS_FUSE_COMBO_COUNT) { |
| cpr3_err(vreg, "invalid CPR fuse combo = %d found, not in range 0 - %d\n", |
| vreg->fuse_combo, |
| CPR4_SDM660_MMSS_FUSE_COMBO_COUNT - 1); |
| return -EINVAL; |
| } |
| |
| vreg->cpr_rev_fuse = fuse->cpr_fusing_rev; |
| vreg->fuse_corner_count = SDM660_MMSS_FUSE_CORNERS; |
| vreg->platform_fuses = fuse; |
| |
| return 0; |
| } |
| |
| /** |
| * cpr3_sdm660_mmss_calculate_open_loop_voltages() - calculate the open-loop |
| * voltage for each corner of a CPR3 regulator |
| * @vreg: Pointer to the CPR3 regulator |
| * |
| * Return: 0 on success, errno on failure |
| */ |
| static int cpr4_sdm660_mmss_calculate_open_loop_voltages( |
| struct cpr3_regulator *vreg) |
| { |
| struct cpr4_sdm660_mmss_fuses *fuse = vreg->platform_fuses; |
| int i, rc = 0; |
| const int *ref_volt; |
| int *fuse_volt; |
| |
| fuse_volt = kcalloc(vreg->fuse_corner_count, sizeof(*fuse_volt), |
| GFP_KERNEL); |
| if (!fuse_volt) |
| return -ENOMEM; |
| |
| ref_volt = sdm660_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], |
| SDM660_MMSS_FUSE_STEP_VOLT, fuse->init_voltage[i], |
| SDM660_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; |
| } |
| |
| 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]; |
| } |
| } |
| |
| for (i = 0; i < vreg->corner_count; i++) |
| vreg->corner[i].open_loop_volt |
| = fuse_volt[vreg->corner[i].cpr_fuse_corner]; |
| |
| 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); |
| |
| done: |
| kfree(fuse_volt); |
| return rc; |
| } |
| |
| /** |
| * cpr4_mmss_parse_ldo_mode_data() - Parse the LDO mode enable state for each |
| * corner of a CPR3 regulator |
| * @vreg: Pointer to the CPR3 regulator |
| * |
| * This function considers 2 sets of data: one set from device node and other |
| * set from fuses and applies set intersection to decide the final LDO mode |
| * enable state of each corner. If the device node configuration is not |
| * specified, then the function applies LDO mode disable for all corners. |
| * |
| * Return: 0 on success, errno on failure |
| */ |
| static int cpr4_mmss_parse_ldo_mode_data(struct cpr3_regulator *vreg) |
| { |
| struct cpr4_sdm660_mmss_fuses *fuse = vreg->platform_fuses; |
| int i, rc = 0; |
| u32 *ldo_allowed; |
| char *prop_str = "qcom,cpr-corner-allow-ldo-mode"; |
| |
| if (!of_find_property(vreg->of_node, prop_str, NULL)) { |
| cpr3_debug(vreg, "%s property is missing. LDO mode is disabled for all corners\n", |
| prop_str); |
| return 0; |
| } |
| |
| ldo_allowed = kcalloc(vreg->corner_count, sizeof(*ldo_allowed), |
| GFP_KERNEL); |
| if (!ldo_allowed) |
| return -ENOMEM; |
| |
| rc = cpr3_parse_corner_array_property(vreg, prop_str, 1, ldo_allowed); |
| if (rc) { |
| cpr3_err(vreg, "%s read failed, rc=%d\n", prop_str, rc); |
| goto done; |
| } |
| |
| for (i = 0; i < vreg->corner_count; i++) |
| vreg->corner[i].ldo_mode_allowed |
| = (ldo_allowed[i] && fuse->ldo_enable[i]); |
| |
| done: |
| kfree(ldo_allowed); |
| return rc; |
| } |
| |
| /** |
| * cpr4_mmss_parse_corner_operating_mode() - Parse the CPR closed-loop operation |
| * enable state for each corner of a CPR3 regulator |
| * @vreg: Pointer to the CPR3 regulator |
| * |
| * This function ensures that closed-loop operation is enabled only for LDO |
| * mode allowed corners. |
| * |
| * Return: 0 on success, errno on failure |
| */ |
| static int cpr4_mmss_parse_corner_operating_mode(struct cpr3_regulator *vreg) |
| { |
| struct cpr4_sdm660_mmss_fuses *fuse = vreg->platform_fuses; |
| int i, rc = 0; |
| u32 *use_closed_loop; |
| char *prop_str = "qcom,cpr-corner-allow-closed-loop"; |
| |
| if (!of_find_property(vreg->of_node, prop_str, NULL)) { |
| cpr3_debug(vreg, "%s property is missing. Use open-loop for all corners\n", |
| prop_str); |
| for (i = 0; i < vreg->corner_count; i++) |
| vreg->corner[i].use_open_loop = true; |
| |
| return 0; |
| } |
| |
| use_closed_loop = kcalloc(vreg->corner_count, sizeof(*use_closed_loop), |
| GFP_KERNEL); |
| if (!use_closed_loop) |
| return -ENOMEM; |
| |
| rc = cpr3_parse_corner_array_property(vreg, prop_str, 1, |
| use_closed_loop); |
| if (rc) { |
| cpr3_err(vreg, "%s read failed, rc=%d\n", prop_str, rc); |
| goto done; |
| } |
| |
| for (i = 0; i < vreg->corner_count; i++) |
| vreg->corner[i].use_open_loop |
| = !(fuse->ldo_cpr_cl_enable && use_closed_loop[i] |
| && vreg->corner[i].ldo_mode_allowed); |
| |
| done: |
| kfree(use_closed_loop); |
| return rc; |
| } |
| |
| /** |
| * cpr4_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 cpr4_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; |
| } |
| |
| /** |
| * cpr4_sdm660_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 cpr4_sdm660_mmss_adjust_target_quotients(struct cpr3_regulator *vreg) |
| { |
| struct cpr4_sdm660_mmss_fuses *fuse = vreg->platform_fuses; |
| const struct cpr3_fuse_param (*offset_param)[2]; |
| int *volt_offset; |
| int i, fuse_len, rc = 0; |
| |
| volt_offset = kcalloc(vreg->fuse_corner_count, sizeof(*volt_offset), |
| GFP_KERNEL); |
| if (!volt_offset) |
| return -ENOMEM; |
| |
| offset_param = sdm660_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, SDM660_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]); |
| } |
| |
| rc = cpr3_adjust_target_quotients(vreg, volt_offset); |
| if (rc) |
| cpr3_err(vreg, "adjust target quotients failed, rc=%d\n", rc); |
| |
| kfree(volt_offset); |
| return rc; |
| } |
| |
| /** |
| * cpr4_mmss_print_settings() - print out MMSS CPR configuration settings into |
| * the kernel log for debugging purposes |
| * @vreg: Pointer to the CPR3 regulator |
| */ |
| static void cpr4_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); |
| } |
| } |
| |
| /** |
| * cpr4_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 cpr4_mmss_init_thread(struct cpr3_thread *thread) |
| { |
| struct cpr3_controller *ctrl = thread->ctrl; |
| struct cpr3_regulator *vreg = &thread->vreg[0]; |
| 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; |
| } |
| |
| if (!of_find_property(ctrl->dev->of_node, "vdd-thread0-ldo-supply", |
| NULL)) { |
| cpr3_err(vreg, "ldo supply regulator is not specified\n"); |
| return -EINVAL; |
| } |
| |
| vreg->ldo_regulator = devm_regulator_get(ctrl->dev, "vdd-thread0-ldo"); |
| if (IS_ERR(vreg->ldo_regulator)) { |
| rc = PTR_ERR(vreg->ldo_regulator); |
| if (rc != -EPROBE_DEFER) |
| cpr3_err(vreg, "unable to request vdd-thread0-ldo regulator, rc=%d\n", |
| rc); |
| return rc; |
| } |
| |
| vreg->ldo_mode_allowed = !of_property_read_bool(vreg->of_node, |
| "qcom,ldo-disable"); |
| vreg->ldo_regulator_bypass = BHS_MODE; |
| vreg->ldo_type = CPR3_LDO300; |
| |
| rc = cpr4_sdm660_mmss_read_fuse_data(vreg); |
| if (rc) { |
| cpr3_err(vreg, "unable to read CPR fuse data, rc=%d\n", rc); |
| return rc; |
| } |
| |
| rc = cpr4_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 = cpr4_sdm660_mmss_adjust_target_quotients(vreg); |
| if (rc) { |
| cpr3_err(vreg, "unable to adjust target quotients, rc=%d\n", |
| rc); |
| return rc; |
| } |
| |
| rc = cpr4_sdm660_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; |
| } |
| |
| rc = cpr4_mmss_parse_ldo_mode_data(vreg); |
| if (rc) { |
| cpr3_err(vreg, "unable to parse ldo mode data, rc=%d\n", rc); |
| return rc; |
| } |
| |
| rc = cpr4_mmss_parse_corner_operating_mode(vreg); |
| if (rc) { |
| cpr3_err(vreg, "unable to parse closed-loop operating mode data, rc=%d\n", |
| rc); |
| return rc; |
| } |
| |
| cpr4_mmss_print_settings(vreg); |
| |
| return 0; |
| } |
| |
| /** |
| * cpr4_mmss_init_controller() - perform MMSS CPR4 controller specific |
| * initializations |
| * @ctrl: Pointer to the CPR3 controller |
| * |
| * Return: 0 on success, errno on failure |
| */ |
| static int cpr4_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; |
| } |
| |
| ctrl->sensor_count = SDM660_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 = SDM660_MMSS_CPR_CLOCK_RATE; |
| ctrl->ctrl_type = CPR_CTRL_TYPE_CPR4; |
| ctrl->support_ldo300_vreg = true; |
| |
| /* |
| * 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; |
| |
| /* iface_clk is optional for sdm660 */ |
| ctrl->iface_clk = NULL; |
| 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 cpr4_mmss_regulator_probe(struct platform_device *pdev) |
| { |
| struct device *dev = &pdev->dev; |
| 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; |
| } |
| |
| 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 = cpr4_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 = cpr4_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; |
| } |
| |
| platform_set_drvdata(pdev, ctrl); |
| |
| return cpr3_regulator_register(pdev, ctrl); |
| } |
| |
| static int cpr4_mmss_regulator_remove(struct platform_device *pdev) |
| { |
| struct cpr3_controller *ctrl = platform_get_drvdata(pdev); |
| |
| return cpr3_regulator_unregister(ctrl); |
| } |
| |
| static int cpr4_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 cpr4_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 const struct of_device_id cpr4_mmss_regulator_match_table[] = { |
| { |
| .compatible = "qcom,cpr4-sdm660-mmss-ldo-regulator", |
| .data = (void *)NULL, |
| }, |
| { }, |
| }; |
| |
| static struct platform_driver cpr4_mmss_regulator_driver = { |
| .driver = { |
| .name = "qcom,cpr4-mmss-ldo-regulator", |
| .of_match_table = cpr4_mmss_regulator_match_table, |
| .owner = THIS_MODULE, |
| }, |
| .probe = cpr4_mmss_regulator_probe, |
| .remove = cpr4_mmss_regulator_remove, |
| .suspend = cpr4_mmss_regulator_suspend, |
| .resume = cpr4_mmss_regulator_resume, |
| }; |
| |
| static int cpr_regulator_init(void) |
| { |
| return platform_driver_register(&cpr4_mmss_regulator_driver); |
| } |
| |
| static void cpr_regulator_exit(void) |
| { |
| platform_driver_unregister(&cpr4_mmss_regulator_driver); |
| } |
| |
| MODULE_DESCRIPTION("CPR4 MMSS LDO regulator driver"); |
| MODULE_LICENSE("GPL v2"); |
| |
| arch_initcall(cpr_regulator_init); |
| module_exit(cpr_regulator_exit); |