Lines Matching +full:max +full:- +full:clk +full:- +full:rate +full:- +full:hz
1 // SPDX-License-Identifier: GPL-2.0
3 * Copyright (C) 2016-2017 Texas Instruments Incorporated - https://www.ti.com/
5 * Dave Gerlach <d-gerlach@ti.com>
11 #include <linux/clk.h>
25 * struct ti_opp_supply_optimum_voltage_table - optimized voltage table
35 * struct ti_opp_supply_data - OMAP specific opp supply data
49 * struct ti_opp_supply_of_data - device tree match data
52 * @efuse_voltage_uv: Are the efuse entries in micro-volts? if not, assume
53 * milli-volts.
64 * _store_optimized_voltages() - store optimized voltages
89 ret = -ENODEV; in _store_optimized_voltages()
93 base = ioremap(res->start, resource_size(res)); in _store_optimized_voltages()
96 ret = -ENOMEM; in _store_optimized_voltages()
100 /* Fetch efuse-settings. */ in _store_optimized_voltages()
101 prop = of_find_property(dev->of_node, "ti,efuse-settings", NULL); in _store_optimized_voltages()
103 dev_err(dev, "No 'ti,efuse-settings' property found\n"); in _store_optimized_voltages()
104 ret = -EINVAL; in _store_optimized_voltages()
108 proplen = prop->length / sizeof(int); in _store_optimized_voltages()
109 data->num_vdd_table = proplen / 2; in _store_optimized_voltages()
111 if (data->num_vdd_table * 2 * sizeof(int) != prop->length) { in _store_optimized_voltages()
112 dev_err(dev, "Invalid 'ti,efuse-settings'\n"); in _store_optimized_voltages()
113 ret = -EINVAL; in _store_optimized_voltages()
117 ret = of_property_read_u32(dev->of_node, "ti,absolute-max-voltage-uv", in _store_optimized_voltages()
118 &data->vdd_absolute_max_voltage_uv); in _store_optimized_voltages()
120 dev_err(dev, "ti,absolute-max-voltage-uv is missing\n"); in _store_optimized_voltages()
121 ret = -EINVAL; in _store_optimized_voltages()
125 table = kcalloc(data->num_vdd_table, sizeof(*data->vdd_table), in _store_optimized_voltages()
128 ret = -ENOMEM; in _store_optimized_voltages()
131 data->vdd_table = table; in _store_optimized_voltages()
133 val = prop->value; in _store_optimized_voltages()
134 for (i = 0; i < data->num_vdd_table; i++, table++) { in _store_optimized_voltages()
138 table->reference_uv = be32_to_cpup(val++); in _store_optimized_voltages()
142 tmp &= of_data->efuse_voltage_mask; in _store_optimized_voltages()
143 tmp >>= __ffs(of_data->efuse_voltage_mask); in _store_optimized_voltages()
145 table->optimized_uv = of_data->efuse_voltage_uv ? tmp : in _store_optimized_voltages()
149 i, efuse_offset, table->reference_uv, in _store_optimized_voltages()
150 table->optimized_uv); in _store_optimized_voltages()
154 * Use reference voltage for those - just add debug message in _store_optimized_voltages()
157 if (!table->optimized_uv) { in _store_optimized_voltages()
159 i, efuse_offset, table->reference_uv); in _store_optimized_voltages()
160 table->optimized_uv = table->reference_uv; in _store_optimized_voltages()
170 * _free_optimized_voltages() - free resources for optvoltages
177 kfree(data->vdd_table); in _free_optimized_voltages()
178 data->vdd_table = NULL; in _free_optimized_voltages()
179 data->num_vdd_table = 0; in _free_optimized_voltages()
183 * _get_optimal_vdd_voltage() - Finds optimal voltage for the supply
198 if (!data->num_vdd_table) in _get_optimal_vdd_voltage()
201 table = data->vdd_table; in _get_optimal_vdd_voltage()
203 return -EINVAL; in _get_optimal_vdd_voltage()
205 /* Find a exact match - this list is usually very small */ in _get_optimal_vdd_voltage()
206 for (i = 0; i < data->num_vdd_table; i++, table++) in _get_optimal_vdd_voltage()
207 if (table->reference_uv == reference_uv) in _get_optimal_vdd_voltage()
208 return table->optimized_uv; in _get_optimal_vdd_voltage()
227 vdd_uv = supply->u_volt; in _opp_set_voltage()
230 * If we do have an absolute max voltage specified, then we should in _opp_set_voltage()
232 * are ganged (example if we set the max for an opp as 1.12v, and in _opp_set_voltage()
233 * the absolute max is 1.5v, for another rail to get 1.25v, it cannot in _opp_set_voltage()
234 * be achieved if the regulator is constrainted to max of 1.12v, even in _opp_set_voltage()
240 uv_max = supply->u_volt_max; in _opp_set_voltage()
243 vdd_uv < supply->u_volt_min || in _opp_set_voltage()
244 supply->u_volt_min > uv_max) { in _opp_set_voltage()
246 "Invalid range voltages [Min:%lu target:%lu Max:%lu]\n", in _opp_set_voltage()
247 supply->u_volt_min, vdd_uv, uv_max); in _opp_set_voltage()
248 return -EINVAL; in _opp_set_voltage()
251 dev_dbg(dev, "%s scaling to %luuV[min %luuV max %luuV]\n", reg_name, in _opp_set_voltage()
252 vdd_uv, supply->u_volt_min, in _opp_set_voltage()
256 supply->u_volt_min, in _opp_set_voltage()
260 dev_err(dev, "%s failed for %luuV[min %luuV max %luuV]\n", in _opp_set_voltage()
261 reg_name, vdd_uv, supply->u_volt_min, in _opp_set_voltage()
270 * ti_opp_supply_set_opp() - do the opp supply transition
278 struct dev_pm_opp_supply *old_supply_vdd = &data->old_opp.supplies[0]; in ti_opp_supply_set_opp()
279 struct dev_pm_opp_supply *old_supply_vbb = &data->old_opp.supplies[1]; in ti_opp_supply_set_opp()
280 struct dev_pm_opp_supply *new_supply_vdd = &data->new_opp.supplies[0]; in ti_opp_supply_set_opp()
281 struct dev_pm_opp_supply *new_supply_vbb = &data->new_opp.supplies[1]; in ti_opp_supply_set_opp()
282 struct device *dev = data->dev; in ti_opp_supply_set_opp()
283 unsigned long old_freq = data->old_opp.rate, freq = data->new_opp.rate; in ti_opp_supply_set_opp()
284 struct clk *clk = data->clk; in ti_opp_supply_set_opp() local
285 struct regulator *vdd_reg = data->regulators[0]; in ti_opp_supply_set_opp()
286 struct regulator *vbb_reg = data->regulators[1]; in ti_opp_supply_set_opp()
291 new_supply_vdd->u_volt); in ti_opp_supply_set_opp()
293 if (new_supply_vdd->u_volt_min < vdd_uv) in ti_opp_supply_set_opp()
294 new_supply_vdd->u_volt_min = vdd_uv; in ti_opp_supply_set_opp()
309 dev_dbg(dev, "%s: switching OPP: %lu Hz --> %lu Hz\n", in ti_opp_supply_set_opp()
312 ret = clk_set_rate(clk, freq); in ti_opp_supply_set_opp()
314 dev_err(dev, "%s: failed to set clock rate: %d\n", __func__, in ti_opp_supply_set_opp()
334 ret = clk_set_rate(clk, old_freq); in ti_opp_supply_set_opp()
336 dev_err(dev, "%s: failed to restore old-freq (%lu Hz)\n", in ti_opp_supply_set_opp()
340 if (old_supply_vdd->u_volt) { in ti_opp_supply_set_opp()
370 {.compatible = "ti,omap-opp-supply", .data = &omap_generic_of_data},
371 {.compatible = "ti,omap5-opp-supply", .data = &omap_omap5_of_data},
372 {.compatible = "ti,omap5-core-opp-supply",
380 struct device *dev = &pdev->dev; in ti_opp_supply_probe()
390 return -ENODEV; in ti_opp_supply_probe()
392 if (!match->data) { in ti_opp_supply_probe()
395 return -EINVAL; in ti_opp_supply_probe()
397 of_data = match->data; in ti_opp_supply_probe()
402 if (of_data->flags & OPPDM_EFUSE_CLASS0_OPTIMIZED_VOLTAGE) { in ti_opp_supply_probe()