From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S935727AbcJUWdK (ORCPT ); Fri, 21 Oct 2016 18:33:10 -0400 Received: from comal.ext.ti.com ([198.47.26.152]:37970 "EHLO comal.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S935056AbcJUWdI (ORCPT ); Fri, 21 Oct 2016 18:33:08 -0400 Message-ID: <580A9798.9070403@ti.com> Date: Fri, 21 Oct 2016 17:32:56 -0500 From: Dave Gerlach User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Thunderbird/31.7.0 MIME-Version: 1.0 To: Viresh Kumar , Rafael Wysocki , , , Viresh Kumar CC: , , , Vincent Guittot , , Subject: Re: [PATCH V2 5/8] PM / OPP: Add infrastructure to manage multiple regulators References: <32c1feabb59b1f00e1cefde606e3ec7ef738ac12.1476952750.git.viresh.kumar@linaro.org> In-Reply-To: <32c1feabb59b1f00e1cefde606e3ec7ef738ac12.1476952750.git.viresh.kumar@linaro.org> Content-Type: text/plain; charset="windows-1252" Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi, On 10/20/2016 03:44 AM, Viresh Kumar wrote: > This patch adds infrastructure to manage multiple regulators and updates > the only user (cpufreq-dt) of dev_pm_opp_set{put}_regulator(). > > This is preparatory work for adding full support for devices with > multiple regulators. > > Signed-off-by: Viresh Kumar > --- > drivers/base/power/opp/core.c | 220 ++++++++++++++++++++++++++------------- > drivers/base/power/opp/debugfs.c | 48 +++++++-- > drivers/base/power/opp/of.c | 102 +++++++++++++----- > drivers/base/power/opp/opp.h | 10 +- > drivers/cpufreq/cpufreq-dt.c | 9 +- > include/linux/pm_opp.h | 8 +- > 6 files changed, 276 insertions(+), 121 deletions(-) > > diff --git a/drivers/base/power/opp/core.c b/drivers/base/power/opp/core.c > index 37fad2eb0f47..45c70ce07864 100644 > --- a/drivers/base/power/opp/core.c > +++ b/drivers/base/power/opp/core.c > @@ -93,6 +93,8 @@ struct opp_table *_find_opp_table(struct device *dev) > * Return: voltage in micro volt corresponding to the opp, else > * return 0 > * > + * This is useful only for devices with single power supply. > + * > * Locking: This function must be called under rcu_read_lock(). opp is a rcu > * protected pointer. This means that opp which could have been fetched by > * opp_find_freq_{exact,ceil,floor} functions is valid as long as we are > @@ -112,7 +114,7 @@ unsigned long dev_pm_opp_get_voltage(struct dev_pm_opp *opp) > if (IS_ERR_OR_NULL(tmp_opp)) > pr_err("%s: Invalid parameters\n", __func__); > else > - v = tmp_opp->supply.u_volt; > + v = tmp_opp->supplies[0].u_volt; > > return v; > } > @@ -222,10 +224,10 @@ unsigned long dev_pm_opp_get_max_volt_latency(struct device *dev) > { > struct opp_table *opp_table; > struct dev_pm_opp *opp; > - struct regulator *reg; > + struct regulator *reg, **regulators; > unsigned long latency_ns = 0; > - unsigned long min_uV = ~0, max_uV = 0; > - int ret; > + unsigned long *min_uV, *max_uV; > + int ret, size, i, count; > > rcu_read_lock(); > > @@ -235,21 +237,44 @@ unsigned long dev_pm_opp_get_max_volt_latency(struct device *dev) > return 0; > } > > - reg = opp_table->regulator; > - if (IS_ERR(reg)) { > + count = opp_table->regulator_count; > + > + if (!count) { > /* Regulator may not be required for device */ > rcu_read_unlock(); > return 0; > } > > - list_for_each_entry_rcu(opp, &opp_table->opp_list, node) { > - if (!opp->available) > - continue; > + size = count * sizeof(*regulators); > + regulators = kmemdup(opp_table->regulators, size, GFP_KERNEL); > + if (!regulators) { > + rcu_read_unlock(); > + return 0; > + } > + > + min_uV = kmalloc(count * (sizeof(*min_uV) + sizeof(*max_uV)), > + GFP_KERNEL); > + if (!min_uV) { > + kfree(regulators); > + rcu_read_unlock(); > + return 0; > + } > + > + max_uV = min_uV + count; > + > + for (i = 0; i < count; i++) { > + min_uV[i] = ~0; > + max_uV[i] = 0; > + > + list_for_each_entry_rcu(opp, &opp_table->opp_list, node) { > + if (!opp->available) > + continue; > > - if (opp->supply.u_volt_min < min_uV) > - min_uV = opp->supply.u_volt_min; > - if (opp->supply.u_volt_max > max_uV) > - max_uV = opp->supply.u_volt_max; > + if (opp->supplies[i].u_volt_min < min_uV[i]) > + min_uV[i] = opp->supplies[i].u_volt_min; > + if (opp->supplies[i].u_volt_max > max_uV[i]) > + max_uV[i] = opp->supplies[i].u_volt_max; > + } > } > > rcu_read_unlock(); > @@ -258,9 +283,14 @@ unsigned long dev_pm_opp_get_max_volt_latency(struct device *dev) > * The caller needs to ensure that opp_table (and hence the regulator) > * isn't freed, while we are executing this routine. > */ > - ret = regulator_set_voltage_time(reg, min_uV, max_uV); > - if (ret > 0) > - latency_ns = ret * 1000; > + for (i = 0; reg = regulators[i], i < count; i++) { > + ret = regulator_set_voltage_time(reg, min_uV[i], max_uV[i]); > + if (ret > 0) > + latency_ns += ret * 1000; > + } > + > + kfree(min_uV); > + kfree(regulators); > > return latency_ns; > } > @@ -580,7 +610,7 @@ int dev_pm_opp_set_rate(struct device *dev, unsigned long target_freq) > { > struct opp_table *opp_table; > struct dev_pm_opp *old_opp, *opp; > - struct regulator *reg; > + struct regulator *reg = ERR_PTR(-ENXIO); > struct clk *clk; > unsigned long freq, old_freq; > struct dev_pm_opp_supply old_supply, new_supply; > @@ -633,14 +663,23 @@ int dev_pm_opp_set_rate(struct device *dev, unsigned long target_freq) > return ret; > } > > + if (opp_table->regulators) { > + /* This function only supports single regulator per device */ > + if (WARN_ON(opp_table->regulator_count > 1)) { > + dev_err(dev, "multiple regulators not supported\n"); > + rcu_read_unlock(); > + return -EINVAL; > + } > + > + reg = opp_table->regulators[0]; > + } > + > if (IS_ERR(old_opp)) > old_supply.u_volt = 0; > else > - memcpy(&old_supply, &old_opp->supply, sizeof(old_supply)); > + memcpy(&old_supply, old_opp->supplies, sizeof(old_supply)); > > - memcpy(&new_supply, &opp->supply, sizeof(new_supply)); > - > - reg = opp_table->regulator; > + memcpy(&new_supply, opp->supplies, sizeof(new_supply)); > > rcu_read_unlock(); > > @@ -764,9 +803,6 @@ static struct opp_table *_add_opp_table(struct device *dev) > > _of_init_opp_table(opp_table, dev); > > - /* Set regulator to a non-NULL error value */ > - opp_table->regulator = ERR_PTR(-ENXIO); > - > /* Find clk for the device */ > opp_table->clk = clk_get(dev, NULL); > if (IS_ERR(opp_table->clk)) { > @@ -815,7 +851,7 @@ static void _remove_opp_table(struct opp_table *opp_table) > if (opp_table->prop_name) > return; > > - if (!IS_ERR(opp_table->regulator)) > + if (opp_table->regulators) > return; > > /* Release clk */ > @@ -924,35 +960,49 @@ struct dev_pm_opp *_allocate_opp(struct device *dev, > struct opp_table **opp_table) > { > struct dev_pm_opp *opp; > + int count, supply_size; > + struct opp_table *table; > > - /* allocate new OPP node */ > - opp = kzalloc(sizeof(*opp), GFP_KERNEL); > - if (!opp) > + table = _add_opp_table(dev); > + if (!table) > return NULL; > > - INIT_LIST_HEAD(&opp->node); > + /* Allocate space for at least one supply */ > + count = table->regulator_count ? table->regulator_count : 1; > + supply_size = sizeof(*opp->supplies) * count; > > - *opp_table = _add_opp_table(dev); > - if (!*opp_table) { > - kfree(opp); > + /* allocate new OPP node + and supplies structures */ > + opp = kzalloc(sizeof(*opp) + supply_size, GFP_KERNEL); > + if (!opp) { > + kfree(table); > return NULL; > } > > + opp->supplies = (struct dev_pm_opp_supply *)(opp + 1); > + INIT_LIST_HEAD(&opp->node); > + > + *opp_table = table; > + > return opp; > } > > static bool _opp_supported_by_regulators(struct dev_pm_opp *opp, > struct opp_table *opp_table) > { > - struct regulator *reg = opp_table->regulator; > - > - if (!IS_ERR(reg) && > - !regulator_is_supported_voltage(reg, opp->supply.u_volt_min, > - opp->supply.u_volt_max)) { > - pr_warn("%s: OPP minuV: %lu maxuV: %lu, not supported by regulator\n", > - __func__, opp->supply.u_volt_min, > - opp->supply.u_volt_max); > - return false; > + struct regulator *reg; > + int i; > + > + for (i = 0; i < opp_table->regulator_count; i++) { > + reg = opp_table->regulators[i]; > + > + if (!regulator_is_supported_voltage(reg, > + opp->supplies[i].u_volt_min, > + opp->supplies[i].u_volt_max)) { > + pr_warn("%s: OPP minuV: %lu maxuV: %lu, not supported by regulator\n", > + __func__, opp->supplies[i].u_volt_min, > + opp->supplies[i].u_volt_max); > + return false; > + } > } > > return true; > @@ -984,12 +1034,13 @@ int _opp_add(struct device *dev, struct dev_pm_opp *new_opp, > > /* Duplicate OPPs */ > dev_warn(dev, "%s: duplicate OPPs detected. Existing: freq: %lu, volt: %lu, enabled: %d. New: freq: %lu, volt: %lu, enabled: %d\n", > - __func__, opp->rate, opp->supply.u_volt, > - opp->available, new_opp->rate, new_opp->supply.u_volt, > - new_opp->available); > + __func__, opp->rate, opp->supplies[0].u_volt, > + opp->available, new_opp->rate, > + new_opp->supplies[0].u_volt, new_opp->available); > > + /* Should we compare voltages for all regulators here ? */ > return opp->available && > - new_opp->supply.u_volt == opp->supply.u_volt ? 0 : -EEXIST; > + new_opp->supplies[0].u_volt == opp->supplies[0].u_volt ? 0 : -EEXIST; > } > > new_opp->opp_table = opp_table; > @@ -1056,9 +1107,9 @@ int _opp_add_v1(struct device *dev, unsigned long freq, long u_volt, > /* populate the opp table */ > new_opp->rate = freq; > tol = u_volt * opp_table->voltage_tolerance_v1 / 100; > - new_opp->supply.u_volt = u_volt; > - new_opp->supply.u_volt_min = u_volt - tol; > - new_opp->supply.u_volt_max = u_volt + tol; > + new_opp->supplies[0].u_volt = u_volt; > + new_opp->supplies[0].u_volt_min = u_volt - tol; > + new_opp->supplies[0].u_volt_max = u_volt + tol; > new_opp->available = true; > new_opp->dynamic = dynamic; > > @@ -1303,12 +1354,14 @@ void dev_pm_opp_put_prop_name(struct device *dev) > EXPORT_SYMBOL_GPL(dev_pm_opp_put_prop_name); > > /** > - * dev_pm_opp_set_regulator() - Set regulator name for the device > + * dev_pm_opp_set_regulators() - Set regulator names for the device > * @dev: Device for which regulator name is being set. > - * @name: Name of the regulator. > + * @names: Array of pointers to the names of the regulator. > + * @count: Number of regulators. > * > * In order to support OPP switching, OPP layer needs to know the name of the > - * device's regulator, as the core would be required to switch voltages as well. > + * device's regulators, as the core would be required to switch voltages as > + * well. > * > * This must be called before any OPPs are initialized for the device. > * > @@ -1318,11 +1371,12 @@ EXPORT_SYMBOL_GPL(dev_pm_opp_put_prop_name); > * that this function is *NOT* called under RCU protection or in contexts where > * mutex cannot be locked. > */ > -int dev_pm_opp_set_regulator(struct device *dev, const char *name) > +int dev_pm_opp_set_regulators(struct device *dev, const char *names[], > + unsigned int count) > { > struct opp_table *opp_table; > struct regulator *reg; > - int ret; > + int ret, i; > > mutex_lock(&opp_table_lock); > > @@ -1338,26 +1392,43 @@ int dev_pm_opp_set_regulator(struct device *dev, const char *name) > goto err; > } > > - /* Already have a regulator set */ > - if (WARN_ON(!IS_ERR(opp_table->regulator))) { > + /* Already have regulators set */ > + if (WARN_ON(opp_table->regulators)) { > ret = -EBUSY; > goto err; > } > - /* Allocate the regulator */ > - reg = regulator_get_optional(dev, name); > - if (IS_ERR(reg)) { > - ret = PTR_ERR(reg); > - if (ret != -EPROBE_DEFER) > - dev_err(dev, "%s: no regulator (%s) found: %d\n", > - __func__, name, ret); > + > + opp_table->regulators = kmalloc_array(count, > + sizeof(*opp_table->regulators), > + GFP_KERNEL); > + if (!opp_table->regulators) > goto err; > + > + for (i = 0; i < count; i++) { > + reg = regulator_get_optional(dev, names[i]); > + pr_info("%s: %d: %p: %s\n", __func__, __LINE__, reg, names[i]); Think this is leftover debug msg? > + if (IS_ERR(reg)) { > + ret = PTR_ERR(reg); > + if (ret != -EPROBE_DEFER) > + dev_err(dev, "%s: regulator (%s) not found: %d\n", > + __func__, names[i], ret); > + goto free_regulators; > + } > + > + opp_table->regulators[i] = reg; > } > > - opp_table->regulator = reg; > + opp_table->regulator_count = count; > > mutex_unlock(&opp_table_lock); > return 0; > > +free_regulators: > + while (i != 0) > + regulator_put(opp_table->regulators[--i]); > + > + kfree(opp_table->regulators); > + opp_table->regulators = NULL; > err: > _remove_opp_table(opp_table); > unlock: > @@ -1365,11 +1436,11 @@ int dev_pm_opp_set_regulator(struct device *dev, const char *name) > > return ret; > } > -EXPORT_SYMBOL_GPL(dev_pm_opp_set_regulator); > +EXPORT_SYMBOL_GPL(dev_pm_opp_set_regulators); > > /** > - * dev_pm_opp_put_regulator() - Releases resources blocked for regulator > - * @dev: Device for which regulator was set. > + * dev_pm_opp_put_regulators() - Releases resources blocked for regulators > + * @dev: Device for which regulators were set. > * > * Locking: The internal opp_table and opp structures are RCU protected. > * Hence this function internally uses RCU updater strategy with mutex locks > @@ -1377,9 +1448,10 @@ EXPORT_SYMBOL_GPL(dev_pm_opp_set_regulator); > * that this function is *NOT* called under RCU protection or in contexts where > * mutex cannot be locked. > */ > -void dev_pm_opp_put_regulator(struct device *dev) > +void dev_pm_opp_put_regulators(struct device *dev) > { > struct opp_table *opp_table; > + int i; > > mutex_lock(&opp_table_lock); > > @@ -1391,16 +1463,20 @@ void dev_pm_opp_put_regulator(struct device *dev) > goto unlock; > } > > - if (IS_ERR(opp_table->regulator)) { > - dev_err(dev, "%s: Doesn't have regulator set\n", __func__); > + if (!opp_table->regulators) { > + dev_err(dev, "%s: Doesn't have regulators set\n", __func__); > goto unlock; > } > > /* Make sure there are no concurrent readers while updating opp_table */ > WARN_ON(!list_empty(&opp_table->opp_list)); > > - regulator_put(opp_table->regulator); > - opp_table->regulator = ERR_PTR(-ENXIO); > + for (i = opp_table->regulator_count - 1; i >= 0; i--) > + regulator_put(opp_table->regulators[i]); > + > + kfree(opp_table->regulators); > + opp_table->regulators = NULL; > + opp_table->regulator_count = 0; > > /* Try freeing opp_table if this was the last blocking resource */ > _remove_opp_table(opp_table); > @@ -1408,7 +1484,7 @@ void dev_pm_opp_put_regulator(struct device *dev) > unlock: > mutex_unlock(&opp_table_lock); > } > -EXPORT_SYMBOL_GPL(dev_pm_opp_put_regulator); > +EXPORT_SYMBOL_GPL(dev_pm_opp_put_regulators); > > /** > * dev_pm_opp_add() - Add an OPP table from a table definitions > diff --git a/drivers/base/power/opp/debugfs.c b/drivers/base/power/opp/debugfs.c > index c897676ca35f..cb5e5fde3d39 100644 > --- a/drivers/base/power/opp/debugfs.c > +++ b/drivers/base/power/opp/debugfs.c > @@ -34,6 +34,43 @@ void opp_debug_remove_one(struct dev_pm_opp *opp) > debugfs_remove_recursive(opp->dentry); > } > > +static bool opp_debug_create_supplies(struct dev_pm_opp *opp, > + struct opp_table *opp_table, > + struct dentry *pdentry) > +{ > + struct dentry *d; > + int i = 0; > + char name[] = "supply-X"; /* support only 0-9 supplies */ > + > + /* Always create at least supply-0 directory */ > + do { > + name[7] = i + '0'; > + > + /* Create per-opp directory */ > + d = debugfs_create_dir(name, pdentry); > + if (!d) > + return false; > + > + if (!debugfs_create_ulong("u_volt_target", S_IRUGO, d, > + &opp->supplies[i].u_volt)) > + return false; > + > + if (!debugfs_create_ulong("u_volt_min", S_IRUGO, d, > + &opp->supplies[i].u_volt_min)) > + return false; > + > + if (!debugfs_create_ulong("u_volt_max", S_IRUGO, d, > + &opp->supplies[i].u_volt_max)) > + return false; > + > + if (!debugfs_create_ulong("u_amp", S_IRUGO, d, > + &opp->supplies[i].u_amp)) > + return false; > + } while (++i < opp_table->regulator_count); > + > + return true; > +} > + > int opp_debug_create_one(struct dev_pm_opp *opp, struct opp_table *opp_table) > { > struct dentry *pdentry = opp_table->dentry; > @@ -63,16 +100,7 @@ int opp_debug_create_one(struct dev_pm_opp *opp, struct opp_table *opp_table) > if (!debugfs_create_ulong("rate_hz", S_IRUGO, d, &opp->rate)) > return -ENOMEM; > > - if (!debugfs_create_ulong("u_volt_target", S_IRUGO, d, &opp->supply.u_volt)) > - return -ENOMEM; > - > - if (!debugfs_create_ulong("u_volt_min", S_IRUGO, d, &opp->supply.u_volt_min)) > - return -ENOMEM; > - > - if (!debugfs_create_ulong("u_volt_max", S_IRUGO, d, &opp->supply.u_volt_max)) > - return -ENOMEM; > - > - if (!debugfs_create_ulong("u_amp", S_IRUGO, d, &opp->supply.u_amp)) > + if (!opp_debug_create_supplies(opp, opp_table, d)) > return -ENOMEM; > > if (!debugfs_create_ulong("clock_latency_ns", S_IRUGO, d, > diff --git a/drivers/base/power/opp/of.c b/drivers/base/power/opp/of.c > index b7fcd0a1b58b..c857fb07a5bc 100644 > --- a/drivers/base/power/opp/of.c > +++ b/drivers/base/power/opp/of.c > @@ -17,6 +17,7 @@ > #include > #include > #include > +#include > #include > > #include "opp.h" > @@ -105,12 +106,13 @@ static bool _opp_is_supported(struct device *dev, struct opp_table *opp_table, Though not in the patch there's a comment to /* TODO: Support multiple regulators */ in the file right above the below opp_parse_supplies function that can probably be removed as part of this patch. Otherwise this patch looks good to me. Regards, Dave > static int opp_parse_supplies(struct dev_pm_opp *opp, struct device *dev, > struct opp_table *opp_table) > { > - u32 microvolt[3] = {0}; > - u32 val; > - int count, ret; > + u32 *microvolt, *microamp = NULL; > + int supplies, vcount, icount, ret, i, j; > struct property *prop = NULL; > char name[NAME_MAX]; > > + supplies = opp_table->regulator_count ? opp_table->regulator_count : 1; > + > /* Search for "opp-microvolt-" */ > if (opp_table->prop_name) { > snprintf(name, sizeof(name), "opp-microvolt-%s", > @@ -128,34 +130,29 @@ static int opp_parse_supplies(struct dev_pm_opp *opp, struct device *dev, > return 0; > } > > - count = of_property_count_u32_elems(opp->np, name); > - if (count < 0) { > + vcount = of_property_count_u32_elems(opp->np, name); > + if (vcount < 0) { > dev_err(dev, "%s: Invalid %s property (%d)\n", > - __func__, name, count); > - return count; > + __func__, name, vcount); > + return vcount; > } > > - /* There can be one or three elements here */ > - if (count != 1 && count != 3) { > - dev_err(dev, "%s: Invalid number of elements in %s property (%d)\n", > - __func__, name, count); > + /* There can be one or three elements per supply */ > + if (vcount != supplies && vcount != supplies * 3) { > + dev_err(dev, "%s: Invalid number of elements in %s property (%d) with supplies (%d)\n", > + __func__, name, vcount, supplies); > return -EINVAL; > } > > - ret = of_property_read_u32_array(opp->np, name, microvolt, count); > + microvolt = kmalloc_array(vcount, sizeof(*microvolt), GFP_KERNEL); > + if (!microvolt) > + return -ENOMEM; > + > + ret = of_property_read_u32_array(opp->np, name, microvolt, vcount); > if (ret) { > dev_err(dev, "%s: error parsing %s: %d\n", __func__, name, ret); > - return -EINVAL; > - } > - > - opp->supply.u_volt = microvolt[0]; > - > - if (count == 1) { > - opp->supply.u_volt_min = opp->supply.u_volt; > - opp->supply.u_volt_max = opp->supply.u_volt; > - } else { > - opp->supply.u_volt_min = microvolt[1]; > - opp->supply.u_volt_max = microvolt[2]; > + ret = -EINVAL; > + goto free_microvolt; > } > > /* Search for "opp-microamp-" */ > @@ -172,10 +169,59 @@ static int opp_parse_supplies(struct dev_pm_opp *opp, struct device *dev, > prop = of_find_property(opp->np, name, NULL); > } > > - if (prop && !of_property_read_u32(opp->np, name, &val)) > - opp->supply.u_amp = val; > + if (prop) { > + icount = of_property_count_u32_elems(opp->np, name); > + if (icount < 0) { > + dev_err(dev, "%s: Invalid %s property (%d)\n", __func__, > + name, icount); > + ret = icount; > + goto free_microvolt; > + } > > - return 0; > + if (icount != supplies) { > + dev_err(dev, "%s: Invalid number of elements in %s property (%d) with supplies (%d)\n", > + __func__, name, icount, supplies); > + ret = -EINVAL; > + goto free_microvolt; > + } > + > + microamp = kmalloc_array(icount, sizeof(*microamp), GFP_KERNEL); > + if (!microamp) { > + ret = -EINVAL; > + goto free_microvolt; > + } > + > + ret = of_property_read_u32_array(opp->np, name, microamp, > + icount); > + if (ret) { > + dev_err(dev, "%s: error parsing %s: %d\n", __func__, > + name, ret); > + ret = -EINVAL; > + goto free_microamp; > + } > + } > + > + for (i = 0, j = 0; i < supplies; i++) { > + opp->supplies[i].u_volt = microvolt[j++]; > + > + if (vcount == supplies) { > + opp->supplies[i].u_volt_min = opp->supplies[i].u_volt; > + opp->supplies[i].u_volt_max = opp->supplies[i].u_volt; > + } else { > + opp->supplies[i].u_volt_min = microvolt[j++]; > + opp->supplies[i].u_volt_max = microvolt[j++]; > + } > + > + if (microamp) > + opp->supplies[i].u_amp = microamp[i]; > + } > + > +free_microamp: > + kfree(microamp); > +free_microvolt: > + kfree(microvolt); > + > + return ret; > } > > /** > @@ -304,8 +350,8 @@ static int _opp_add_static_v2(struct device *dev, struct device_node *np) > > pr_debug("%s: turbo:%d rate:%lu uv:%lu uvmin:%lu uvmax:%lu latency:%lu\n", > __func__, new_opp->turbo, new_opp->rate, > - new_opp->supply.u_volt, new_opp->supply.u_volt_min, > - new_opp->supply.u_volt_max, new_opp->clock_latency_ns); > + new_opp->supplies[0].u_volt, new_opp->supplies[0].u_volt_min, > + new_opp->supplies[0].u_volt_max, new_opp->clock_latency_ns); > > /* > * Notify the changes in the availability of the operable > diff --git a/drivers/base/power/opp/opp.h b/drivers/base/power/opp/opp.h > index 1bda0d35c486..d3f0861f9bff 100644 > --- a/drivers/base/power/opp/opp.h > +++ b/drivers/base/power/opp/opp.h > @@ -77,7 +77,7 @@ struct dev_pm_opp_supply { > * @turbo: true if turbo (boost) OPP > * @suspend: true if suspend OPP > * @rate: Frequency in hertz > - * @supply: Power supply voltage/current values > + * @supplies: Power supplies voltage/current values > * @clock_latency_ns: Latency (in nanoseconds) of switching to this OPP's > * frequency from any other OPP's frequency. > * @opp_table: points back to the opp_table struct this opp belongs to > @@ -96,7 +96,7 @@ struct dev_pm_opp { > bool suspend; > unsigned long rate; > > - struct dev_pm_opp_supply supply; > + struct dev_pm_opp_supply *supplies; > > unsigned long clock_latency_ns; > > @@ -155,7 +155,8 @@ enum opp_table_access { > * @supported_hw_count: Number of elements in supported_hw array. > * @prop_name: A name to postfix to many DT properties, while parsing them. > * @clk: Device's clock handle > - * @regulator: Supply regulator > + * @regulators: Supply regulators > + * @regulator_count: Number of Power Supply regulators > * @dentry: debugfs dentry pointer of the real device directory (not links). > * @dentry_name: Name of the real dentry. > * > @@ -190,7 +191,8 @@ struct opp_table { > unsigned int supported_hw_count; > const char *prop_name; > struct clk *clk; > - struct regulator *regulator; > + struct regulator **regulators; > + unsigned int regulator_count; > > #ifdef CONFIG_DEBUG_FS > struct dentry *dentry; > diff --git a/drivers/cpufreq/cpufreq-dt.c b/drivers/cpufreq/cpufreq-dt.c > index 5c07ae05d69a..15cb26118dc7 100644 > --- a/drivers/cpufreq/cpufreq-dt.c > +++ b/drivers/cpufreq/cpufreq-dt.c > @@ -186,7 +186,10 @@ static int cpufreq_init(struct cpufreq_policy *policy) > */ > name = find_supply_name(cpu_dev); > if (name) { > - ret = dev_pm_opp_set_regulator(cpu_dev, name); > + const char *names[] = {name}; > + > + ret = dev_pm_opp_set_regulators(cpu_dev, names, > + ARRAY_SIZE(names)); > if (ret) { > dev_err(cpu_dev, "Failed to set regulator for cpu%d: %d\n", > policy->cpu, ret); > @@ -285,7 +288,7 @@ static int cpufreq_init(struct cpufreq_policy *policy) > out_free_opp: > dev_pm_opp_of_cpumask_remove_table(policy->cpus); > if (name) > - dev_pm_opp_put_regulator(cpu_dev); > + dev_pm_opp_put_regulators(cpu_dev); > out_put_clk: > clk_put(cpu_clk); > > @@ -300,7 +303,7 @@ static int cpufreq_exit(struct cpufreq_policy *policy) > dev_pm_opp_free_cpufreq_table(priv->cpu_dev, &policy->freq_table); > dev_pm_opp_of_cpumask_remove_table(policy->related_cpus); > if (priv->reg_name) > - dev_pm_opp_put_regulator(priv->cpu_dev); > + dev_pm_opp_put_regulators(priv->cpu_dev); > > clk_put(policy->clk); > kfree(priv); > diff --git a/include/linux/pm_opp.h b/include/linux/pm_opp.h > index bca26157f5b6..0606b70a8b97 100644 > --- a/include/linux/pm_opp.h > +++ b/include/linux/pm_opp.h > @@ -62,8 +62,8 @@ int dev_pm_opp_set_supported_hw(struct device *dev, const u32 *versions, > void dev_pm_opp_put_supported_hw(struct device *dev); > int dev_pm_opp_set_prop_name(struct device *dev, const char *name); > void dev_pm_opp_put_prop_name(struct device *dev); > -int dev_pm_opp_set_regulator(struct device *dev, const char *name); > -void dev_pm_opp_put_regulator(struct device *dev); > +int dev_pm_opp_set_regulators(struct device *dev, const char *names[], unsigned int count); > +void dev_pm_opp_put_regulators(struct device *dev); > int dev_pm_opp_set_rate(struct device *dev, unsigned long target_freq); > int dev_pm_opp_set_sharing_cpus(struct device *cpu_dev, const struct cpumask *cpumask); > int dev_pm_opp_get_sharing_cpus(struct device *cpu_dev, struct cpumask *cpumask); > @@ -170,12 +170,12 @@ static inline int dev_pm_opp_set_prop_name(struct device *dev, const char *name) > > static inline void dev_pm_opp_put_prop_name(struct device *dev) {} > > -static inline int dev_pm_opp_set_regulator(struct device *dev, const char *name) > +static inline int dev_pm_opp_set_regulators(struct device *dev, const char *names[], unsigned int count) > { > return -ENOTSUPP; > } > > -static inline void dev_pm_opp_put_regulator(struct device *dev) {} > +static inline void dev_pm_opp_put_regulators(struct device *dev) {} > > static inline int dev_pm_opp_set_rate(struct device *dev, unsigned long target_freq) > { >