diff options
Diffstat (limited to 'drivers/base')
| -rw-r--r-- | drivers/base/core.c | 51 | ||||
| -rw-r--r-- | drivers/base/dd.c | 14 | ||||
| -rw-r--r-- | drivers/base/platform.c | 2 | ||||
| -rw-r--r-- | drivers/base/power/domain.c | 70 | ||||
| -rw-r--r-- | drivers/base/power/main.c | 20 | ||||
| -rw-r--r-- | drivers/base/power/trace.c | 6 | ||||
| -rw-r--r-- | drivers/base/property.c | 198 |
7 files changed, 278 insertions, 83 deletions
diff --git a/drivers/base/core.c b/drivers/base/core.c index cadf165..21d1303 100644 --- a/drivers/base/core.c +++ b/drivers/base/core.c @@ -12,6 +12,7 @@ #include <linux/device.h> #include <linux/err.h> +#include <linux/fwnode.h> #include <linux/init.h> #include <linux/module.h> #include <linux/slab.h> @@ -2144,3 +2145,53 @@ define_dev_printk_level(dev_notice, KERN_NOTICE); define_dev_printk_level(_dev_info, KERN_INFO); #endif + +static inline bool fwnode_is_primary(struct fwnode_handle *fwnode) +{ + return fwnode && !IS_ERR(fwnode->secondary); +} + +/** + * set_primary_fwnode - Change the primary firmware node of a given device. + * @dev: Device to handle. + * @fwnode: New primary firmware node of the device. + * + * Set the device's firmware node pointer to @fwnode, but if a secondary + * firmware node of the device is present, preserve it. + */ +void set_primary_fwnode(struct device *dev, struct fwnode_handle *fwnode) +{ + if (fwnode) { + struct fwnode_handle *fn = dev->fwnode; + + if (fwnode_is_primary(fn)) + fn = fn->secondary; + + fwnode->secondary = fn; + dev->fwnode = fwnode; + } else { + dev->fwnode = fwnode_is_primary(dev->fwnode) ? + dev->fwnode->secondary : NULL; + } +} +EXPORT_SYMBOL_GPL(set_primary_fwnode); + +/** + * set_secondary_fwnode - Change the secondary firmware node of a given device. + * @dev: Device to handle. + * @fwnode: New secondary firmware node of the device. + * + * If a primary firmware node of the device is present, set its secondary + * pointer to @fwnode. Otherwise, set the device's firmware node pointer to + * @fwnode. + */ +void set_secondary_fwnode(struct device *dev, struct fwnode_handle *fwnode) +{ + if (fwnode) + fwnode->secondary = ERR_PTR(-ENODEV); + + if (fwnode_is_primary(dev->fwnode)) + dev->fwnode->secondary = fwnode; + else + dev->fwnode = fwnode; +} diff --git a/drivers/base/dd.c b/drivers/base/dd.c index 49a4a12..e843fdb 100644 --- a/drivers/base/dd.c +++ b/drivers/base/dd.c @@ -298,6 +298,12 @@ static int really_probe(struct device *dev, struct device_driver *drv) goto probe_failed; } + if (dev->pm_domain && dev->pm_domain->activate) { + ret = dev->pm_domain->activate(dev); + if (ret) + goto probe_failed; + } + if (dev->bus->probe) { ret = dev->bus->probe(dev); if (ret) @@ -308,6 +314,9 @@ static int really_probe(struct device *dev, struct device_driver *drv) goto probe_failed; } + if (dev->pm_domain && dev->pm_domain->sync) + dev->pm_domain->sync(dev); + driver_bound(dev); ret = 1; pr_debug("bus: '%s': %s: bound device %s to driver %s\n", @@ -319,6 +328,8 @@ probe_failed: driver_sysfs_remove(dev); dev->driver = NULL; dev_set_drvdata(dev, NULL); + if (dev->pm_domain && dev->pm_domain->dismiss) + dev->pm_domain->dismiss(dev); switch (ret) { case -EPROBE_DEFER: @@ -529,6 +540,9 @@ static void __device_release_driver(struct device *dev) devres_release_all(dev); dev->driver = NULL; dev_set_drvdata(dev, NULL); + if (dev->pm_domain && dev->pm_domain->dismiss) + dev->pm_domain->dismiss(dev); + klist_remove(&dev->p->knode_driver); if (dev->bus) blocking_notifier_call_chain(&dev->bus->p->bus_notifier, diff --git a/drivers/base/platform.c b/drivers/base/platform.c index e68ab79..ebf034b 100644 --- a/drivers/base/platform.c +++ b/drivers/base/platform.c @@ -463,7 +463,7 @@ struct platform_device *platform_device_register_full( goto err_alloc; pdev->dev.parent = pdevinfo->parent; - ACPI_COMPANION_SET(&pdev->dev, pdevinfo->acpi_node.companion); + pdev->dev.fwnode = pdevinfo->fwnode; if (pdevinfo->dma_mask) { /* diff --git a/drivers/base/power/domain.c b/drivers/base/power/domain.c index 45937f8..2327613 100644 --- a/drivers/base/power/domain.c +++ b/drivers/base/power/domain.c @@ -68,7 +68,36 @@ static struct generic_pm_domain *pm_genpd_lookup_name(const char *domain_name) return genpd; } -struct generic_pm_domain *dev_to_genpd(struct device *dev) +/* + * Get the generic PM domain for a particular struct device. + * This validates the struct device pointer, the PM domain pointer, + * and checks that the PM domain pointer is a real generic PM domain. + * Any failure results in NULL being returned. + */ +struct generic_pm_domain *pm_genpd_lookup_dev(struct device *dev) +{ + struct generic_pm_domain *genpd = NULL, *gpd; + + if (IS_ERR_OR_NULL(dev) || IS_ERR_OR_NULL(dev->pm_domain)) + return NULL; + + mutex_lock(&gpd_list_lock); + list_for_each_entry(gpd, &gpd_list, gpd_list_node) { + if (&gpd->domain == dev->pm_domain) { + genpd = gpd; + break; + } + } + mutex_unlock(&gpd_list_lock); + + return genpd; +} + +/* + * This should only be used where we are certain that the pm_domain + * attached to the device is a genpd domain. + */ +static struct generic_pm_domain *dev_to_genpd(struct device *dev) { if (IS_ERR_OR_NULL(dev->pm_domain)) return ERR_PTR(-EINVAL); @@ -173,8 +202,8 @@ static int genpd_power_on(struct generic_pm_domain *genpd) genpd->power_on_latency_ns = elapsed_ns; genpd->max_off_time_changed = true; genpd_recalc_cpu_exit_latency(genpd); - pr_warn("%s: Power-%s latency exceeded, new value %lld ns\n", - genpd->name, "on", elapsed_ns); + pr_debug("%s: Power-%s latency exceeded, new value %lld ns\n", + genpd->name, "on", elapsed_ns); return ret; } @@ -199,8 +228,8 @@ static int genpd_power_off(struct generic_pm_domain *genpd) genpd->power_off_latency_ns = elapsed_ns; genpd->max_off_time_changed = true; - pr_warn("%s: Power-%s latency exceeded, new value %lld ns\n", - genpd->name, "off", elapsed_ns); + pr_debug("%s: Power-%s latency exceeded, new value %lld ns\n", + genpd->name, "off", elapsed_ns); return ret; } @@ -1513,9 +1542,7 @@ int pm_genpd_remove_device(struct generic_pm_domain *genpd, dev_dbg(dev, "%s()\n", __func__); - if (IS_ERR_OR_NULL(genpd) || IS_ERR_OR_NULL(dev) - || IS_ERR_OR_NULL(dev->pm_domain) - || pd_to_genpd(dev->pm_domain) != genpd) + if (!genpd || genpd != pm_genpd_lookup_dev(dev)) return -EINVAL; /* The above validation also means we have existing domain_data. */ @@ -2093,21 +2120,10 @@ EXPORT_SYMBOL_GPL(of_genpd_get_from_provider); */ static void genpd_dev_pm_detach(struct device *dev, bool power_off) { - struct generic_pm_domain *pd = NULL, *gpd; + struct generic_pm_domain *pd; int ret = 0; - if (!dev->pm_domain) - return; - - mutex_lock(&gpd_list_lock); - list_for_each_entry(gpd, &gpd_list, gpd_list_node) { - if (&gpd->domain == dev->pm_domain) { - pd = gpd; - break; - } - } - mutex_unlock(&gpd_list_lock); - + pd = pm_genpd_lookup_dev(dev); if (!pd) return; @@ -2130,6 +2146,17 @@ static void genpd_dev_pm_detach(struct device *dev, bool power_off) genpd_queue_power_off_work(pd); } +static void genpd_dev_pm_sync(struct device *dev) +{ + struct generic_pm_domain *pd; + + pd = dev_to_genpd(dev); + if (IS_ERR(pd)) + return; + + genpd_queue_power_off_work(pd); +} + /** * genpd_dev_pm_attach - Attach a device to its PM domain using DT. * @dev: Device to attach. @@ -2196,6 +2223,7 @@ int genpd_dev_pm_attach(struct device *dev) } dev->pm_domain->detach = genpd_dev_pm_detach; + dev->pm_domain->sync = genpd_dev_pm_sync; pm_genpd_poweron(pd); return 0; diff --git a/drivers/base/power/main.c b/drivers/base/power/main.c index 9717d5f..3d874ec 100644 --- a/drivers/base/power/main.c +++ b/drivers/base/power/main.c @@ -23,7 +23,7 @@ #include <linux/mutex.h> #include <linux/pm.h> #include <linux/pm_runtime.h> -#include <linux/resume-trace.h> +#include <linux/pm-trace.h> #include <linux/interrupt.h> #include <linux/sched.h> #include <linux/async.h> @@ -1017,6 +1017,9 @@ static int __device_suspend_noirq(struct device *dev, pm_message_t state, bool a char *info = NULL; int error = 0; + TRACE_DEVICE(dev); + TRACE_SUSPEND(0); + if (async_error) goto Complete; @@ -1057,6 +1060,7 @@ static int __device_suspend_noirq(struct device *dev, pm_message_t state, bool a Complete: complete_all(&dev->power.completion); + TRACE_SUSPEND(error); return error; } @@ -1078,7 +1082,7 @@ static int device_suspend_noirq(struct device *dev) { reinit_completion(&dev->power.completion); - if (pm_async_enabled && dev->power.async_suspend) { + if (is_async(dev)) { get_device(dev); async_schedule(async_suspend_noirq, dev); return 0; @@ -1157,6 +1161,9 @@ static int __device_suspend_late(struct device *dev, pm_message_t state, bool as char *info = NULL; int error = 0; + TRACE_DEVICE(dev); + TRACE_SUSPEND(0); + __pm_runtime_disable(dev, false); if (async_error) @@ -1198,6 +1205,7 @@ static int __device_suspend_late(struct device *dev, pm_message_t state, bool as async_error = error; Complete: + TRACE_SUSPEND(error); complete_all(&dev->power.completion); return error; } @@ -1219,7 +1227,7 @@ static int device_suspend_late(struct device *dev) { reinit_completion(&dev->power.completion); - if (pm_async_enabled && dev->power.async_suspend) { + if (is_async(dev)) { get_device(dev); async_schedule(async_suspend_late, dev); return 0; @@ -1338,6 +1346,9 @@ static int __device_suspend(struct device *dev, pm_message_t state, bool async) int error = 0; DECLARE_DPM_WATCHDOG_ON_STACK(wd); + TRACE_DEVICE(dev); + TRACE_SUSPEND(0); + dpm_wait_for_children(dev, async); if (async_error) @@ -1444,6 +1455,7 @@ static int __device_suspend(struct device *dev, pm_message_t state, bool async) if (error) async_error = error; + TRACE_SUSPEND(error); return error; } @@ -1465,7 +1477,7 @@ static int device_suspend(struct device *dev) { reinit_completion(&dev->power.completion); - if (pm_async_enabled && dev->power.async_suspend) { + if (is_async(dev)) { get_device(dev); async_schedule(async_suspend, dev); return 0; diff --git a/drivers/base/power/trace.c b/drivers/base/power/trace.c index d94a1f51..a311cfa 100644 --- a/drivers/base/power/trace.c +++ b/drivers/base/power/trace.c @@ -7,7 +7,7 @@ * devices may be working. */ -#include <linux/resume-trace.h> +#include <linux/pm-trace.h> #include <linux/export.h> #include <linux/rtc.h> @@ -154,7 +154,7 @@ EXPORT_SYMBOL(set_trace_device); * it's not any guarantee, but it's a high _likelihood_ that * the match is valid). */ -void generate_resume_trace(const void *tracedata, unsigned int user) +void generate_pm_trace(const void *tracedata, unsigned int user) { unsigned short lineno = *(unsigned short *)tracedata; const char *file = *(const char **)(tracedata + 2); @@ -164,7 +164,7 @@ void generate_resume_trace(const void *tracedata, unsigned int user) file_hash_value = hash_string(lineno, file, FILEHASH); set_magic_time(user_hash_value, file_hash_value, dev_hash_value); } -EXPORT_SYMBOL(generate_resume_trace); +EXPORT_SYMBOL(generate_pm_trace); extern char __tracedata_start, __tracedata_end; static int show_file_hash(unsigned int value) diff --git a/drivers/base/property.c b/drivers/base/property.c index 423df59..1d0b116 100644 --- a/drivers/base/property.c +++ b/drivers/base/property.c @@ -10,10 +10,102 @@ * published by the Free Software Foundation. */ -#include <linux/property.h> -#include <linux/export.h> #include <linux/acpi.h> +#include <linux/export.h> +#include <linux/kernel.h> #include <linux/of.h> +#include <linux/property.h> + +/** + * device_add_property_set - Add a collection of properties to a device object. + * @dev: Device to add properties to. + * @pset: Collection of properties to add. + * + * Associate a collection of device properties represented by @pset with @dev + * as its secondary firmware node. + */ +void device_add_property_set(struct device *dev, struct property_set *pset) +{ + if (pset) + pset->fwnode.type = FWNODE_PDATA; + + set_secondary_fwnode(dev, &pset->fwnode); +} +EXPORT_SYMBOL_GPL(device_add_property_set); + +static inline bool is_pset(struct fwnode_handle *fwnode) +{ + return fwnode && fwnode->type == FWNODE_PDATA; +} + +static inline struct property_set *to_pset(struct fwnode_handle *fwnode) +{ + return is_pset(fwnode) ? + container_of(fwnode, struct property_set, fwnode) : NULL; +} + +static struct property_entry *pset_prop_get(struct property_set *pset, + const char *name) +{ + struct property_entry *prop; + + if (!pset || !pset->properties) + return NULL; + + for (prop = pset->properties; prop->name; prop++) + if (!strcmp(name, prop->name)) + return prop; + + return NULL; +} + +static int pset_prop_read_array(struct property_set *pset, const char *name, + enum dev_prop_type type, void *val, size_t nval) +{ + struct property_entry *prop; + unsigned int item_size; + + prop = pset_prop_get(pset, name); + if (!prop) + return -ENODATA; + + if (prop->type != type) + return -EPROTO; + + if (!val) + return prop->nval; + + if (prop->nval < nval) + return -EOVERFLOW; + + switch (type) { + case DEV_PROP_U8: + item_size = sizeof(u8); + break; + case DEV_PROP_U16: + item_size = sizeof(u16); + break; + case DEV_PROP_U32: + item_size = sizeof(u32); + break; + case DEV_PROP_U64: + item_size = sizeof(u64); + break; + case DEV_PROP_STRING: + item_size = sizeof(const char *); + break; + default: + return -EINVAL; + } + memcpy(val, prop->value.raw_data, nval * item_size); + return 0; +} + +static inline struct fwnode_handle *dev_fwnode(struct device *dev) +{ + return IS_ENABLED(CONFIG_OF) && dev->of_node ? + &dev->of_node->fwnode : dev->fwnode; +} /** * device_property_present - check if a property of a device is present @@ -24,10 +116,7 @@ */ bool device_property_present(struct device *dev, const char *propname) { - if (IS_ENABLED(CONFIG_OF) && dev->of_node) - return of_property_read_bool(dev->of_node, propname); - - return !acpi_dev_prop_get(ACPI_COMPANION(dev), propname, NULL); + return fwnode_property_present(dev_fwnode(dev), propname); } EXPORT_SYMBOL_GPL(device_property_present); @@ -43,32 +132,22 @@ bool fwnode_property_present(struct fwnode_handle *fwnode, const char *propname) else if (is_acpi_node(fwnode)) return !acpi_dev_prop_get(acpi_node(fwnode), propname, NULL); - return false; + return !!pset_prop_get(to_pset(fwnode), propname); } EXPORT_SYMBOL_GPL(fwnode_property_present); -#define OF_DEV_PROP_READ_ARRAY(node, propname, type, val, nval) \ - (val) ? of_property_read_##type##_array((node), (propname), (val), (nval)) \ - : of_property_count_elems_of_size((node), (propname), sizeof(type)) - -#define DEV_PROP_READ_ARRAY(_dev_, _propname_, _type_, _proptype_, _val_, _nval_) \ - IS_ENABLED(CONFIG_OF) && _dev_->of_node ? \ - (OF_DEV_PROP_READ_ARRAY(_dev_->of_node, _propname_, _type_, \ - _val_, _nval_)) : \ - acpi_dev_prop_read(ACPI_COMPANION(_dev_), _propname_, \ - _proptype_, _val_, _nval_) - /** * device_property_read_u8_array - return a u8 array property of a device * @dev: Device to get the property of * @propname: Name of the property - * @val: The values are stored here + * @val: The values are stored here or %NULL to return the number of values * @nval: Size of the @val array * * Function reads an array of u8 properties with @propname from the device * firmware description and stores them to @val if found. * - * Return: %0 if the property was found (success), + * Return: number of values if @val was %NULL, + * %0 if the property was found (success), * %-EINVAL if given arguments are not valid, * %-ENODATA if the property does not have a value, * %-EPROTO if the property is not an array of numbers, @@ -77,7 +156,7 @@ EXPORT_SYMBOL_GPL(fwnode_property_present); int device_property_read_u8_array(struct device *dev, const char *propname, u8 *val, size_t nval) { - return DEV_PROP_READ_ARRAY(dev, propname, u8, DEV_PROP_U8, val, nval); + return fwnode_property_read_u8_array(dev_fwnode(dev), propname, val, nval); } EXPORT_SYMBOL_GPL(device_property_read_u8_array); @@ -85,13 +164,14 @@ EXPORT_SYMBOL_GPL(device_property_read_u8_array); * device_property_read_u16_array - return a u16 array property of a device * @dev: Device to get the property of * @propname: Name of the property - * @val: The values are stored here + * @val: The values are stored here or %NULL to return the number of values * @nval: Size of the @val array * * Function reads an array of u16 properties with @propname from the device * firmware description and stores them to @val if found. * - * Return: %0 if the property was found (success), + * Return: number of values if @val was %NULL, + * %0 if the property was found (success), * %-EINVAL if given arguments are not valid, * %-ENODATA if the property does not have a value, * %-EPROTO if the property is not an array of numbers, @@ -100,7 +180,7 @@ EXPORT_SYMBOL_GPL(device_property_read_u8_array); int device_property_read_u16_array(struct device *dev, const char *propname, u16 *val, size_t nval) { - return DEV_PROP_READ_ARRAY(dev, propname, u16, DEV_PROP_U16, val, nval); + return fwnode_property_read_u16_array(dev_fwnode(dev), propname, val, nval); } EXPORT_SYMBOL_GPL(device_property_read_u16_array); @@ -108,13 +188,14 @@ EXPORT_SYMBOL_GPL(device_property_read_u16_array); * device_property_read_u32_array - return a u32 array property of a device * @dev: Device to get the property of * @propname: Name of the property - * @val: The values are stored here + * @val: The values are stored here or %NULL to return the number of values * @nval: Size of the @val array * * Function reads an array of u32 properties with @propname from the device * firmware description and stores them to @val if found. * - * Return: %0 if the property was found (success), + * Return: number of values if @val was %NULL, + * %0 if the property was found (success), * %-EINVAL if given arguments are not valid, * %-ENODATA if the property does not have a value, * %-EPROTO if the property is not an array of numbers, @@ -123,7 +204,7 @@ EXPORT_SYMBOL_GPL(device_property_read_u16_array); int device_property_read_u32_array(struct device *dev, const char *propname, u32 *val, size_t nval) { - return DEV_PROP_READ_ARRAY(dev, propname, u32, DEV_PROP_U32, val, nval); + return fwnode_property_read_u32_array(dev_fwnode(dev), propname, val, nval); } EXPORT_SYMBOL_GPL(device_property_read_u32_array); @@ -131,13 +212,14 @@ EXPORT_SYMBOL_GPL(device_property_read_u32_array); * device_property_read_u64_array - return a u64 array property of a device * @dev: Device to get the property of * @propname: Name of the property - * @val: The values are stored here + * @val: The values are stored here or %NULL to return the number of values * @nval: Size of the @val array * * Function reads an array of u64 properties with @propname from the device * firmware description and stores them to @val if found. * - * Return: %0 if the property was found (success), + * Return: number of values if @val was %NULL, + * %0 if the property was found (success), * %-EINVAL if given arguments are not valid, * %-ENODATA if the property does not have a value, * %-EPROTO if the property is not an array of numbers, @@ -146,7 +228,7 @@ EXPORT_SYMBOL_GPL(device_property_read_u32_array); int device_property_read_u64_array(struct device *dev, const char *propname, u64 *val, size_t nval) { - return DEV_PROP_READ_ARRAY(dev, propname, u64, DEV_PROP_U64, val, nval); + return fwnode_property_read_u64_array(dev_fwnode(dev), propname, val, nval); } EXPORT_SYMBOL_GPL(device_property_read_u64_array); @@ -154,13 +236,14 @@ EXPORT_SYMBOL_GPL(device_property_read_u64_array); * device_property_read_string_array - return a string array property of device * @dev: Device to get the property of * @propname: Name of the property - * @val: The values are stored here + * @val: The values are stored here or %NULL to return the number of values * @nval: Size of the @val array * * Function reads an array of string properties with @propname from the device * firmware description and stores them to @val if found. * - * Return: %0 if the property was found (success), + * Return: number of values if @val was %NULL, + * %0 if the property was found (success), * %-EINVAL if given arguments are not valid, * %-ENODATA if the property does not have a value, * %-EPROTO or %-EILSEQ if the property is not an array of strings, @@ -169,10 +252,7 @@ EXPORT_SYMBOL_GPL(device_property_read_u64_array); int device_property_read_string_array(struct device *dev, const char *propname, const char **val, size_t nval) { - return IS_ENABLED(CONFIG_OF) && dev->of_node ? - of_property_read_string_array(dev->of_node, propname, val, nval) : - acpi_dev_prop_read(ACPI_COMPANION(dev), propname, - DEV_PROP_STRING, val, nval); + return fwnode_property_read_string_array(dev_fwnode(dev), propname, val, nval); } EXPORT_SYMBOL_GPL(device_property_read_string_array); @@ -193,13 +273,14 @@ EXPORT_SYMBOL_GPL(device_property_read_string_array); int device_property_read_string(struct device *dev, const char *propname, const char **val) { - return IS_ENABLED(CONFIG_OF) && dev->of_node ? - of_property_read_string(dev->of_node, propname, val) : - acpi_dev_prop_read(ACPI_COMPANION(dev), propname, - DEV_PROP_STRING, val, 1); + return fwnode_property_read_string(dev_fwnode(dev), propname, val); } EXPORT_SYMBOL_GPL(device_property_read_string); +#define OF_DEV_PROP_READ_ARRAY(node, propname, type, val, nval) \ + (val) ? of_property_read_##type##_array((node), (propname), (val), (nval)) \ + : of_property_count_elems_of_size((node), (propname), sizeof(type)) + #define FWNODE_PROP_READ_ARRAY(_fwnode_, _propname_, _type_, _proptype_, _val_, _nval_) \ ({ \ int _ret_; \ @@ -210,7 +291,8 @@ EXPORT_SYMBOL_GPL(device_property_read_string); _ret_ = acpi_dev_prop_read(acpi_node(_fwnode_), _propname_, \ _proptype_, _val_, _nval_); \ else \ - _ret_ = -ENXIO; \ + _ret_ = pset_prop_read_array(to_pset(_fwnode_), _propname_, \ + _proptype_, _val_, _nval_); \ _ret_; \ }) @@ -218,13 +300,14 @@ EXPORT_SYMBOL_GPL(device_property_read_string); * fwnode_property_read_u8_array - return a u8 array property of firmware node * @fwnode: Firmware node to get the property of * @propname: Name of the property - * @val: The values are stored here + * @val: The values are stored here or %NULL to return the number of values * @nval: Size of the @val array * * Read an array of u8 properties with @propname from @fwnode and stores them to * @val if found. * - * Return: %0 if the property was found (success), + * Return: number of values if @val was %NULL, + * %0 if the property was found (success), * %-EINVAL if given arguments are not valid, * %-ENODATA if the property does not have a value, * %-EPROTO if the property is not an array of numbers, @@ -243,13 +326,14 @@ EXPORT_SYMBOL_GPL(fwnode_property_read_u8_array); * fwnode_property_read_u16_array - return a u16 array property of firmware node * @fwnode: Firmware node to get the property of * @propname: Name of the property - * @val: The values are stored here + * @val: The values are stored here or %NULL to return the number of values * @nval: Size of the @val array * * Read an array of u16 properties with @propname from @fwnode and store them to * @val if found. * - * Return: %0 if the property was found (success), + * Return: number of values if @val was %NULL, + * %0 if the property was found (success), * %-EINVAL if given arguments are not valid, * %-ENODATA if the property does not have a value, * %-EPROTO if the property is not an array of numbers, @@ -268,13 +352,14 @@ EXPORT_SYMBOL_GPL(fwnode_property_read_u16_array); * fwnode_property_read_u32_array - return a u32 array property of firmware node * @fwnode: Firmware node to get the property of * @propname: Name of the property - * @val: The values are stored here + * @val: The values are stored here or %NULL to return the number of values * @nval: Size of the @val array * * Read an array of u32 properties with @propname from @fwnode store them to * @val if found. * - * Return: %0 if the property was found (success), + * Return: number of values if @val was %NULL, + * %0 if the property was found (success), * %-EINVAL if given arguments are not valid, * %-ENODATA if the property does not have a value, * %-EPROTO if the property is not an array of numbers, @@ -293,13 +378,14 @@ EXPORT_SYMBOL_GPL(fwnode_property_read_u32_array); * fwnode_property_read_u64_array - return a u64 array property firmware node * @fwnode: Firmware node to get the property of * @propname: Name of the property - * @val: The values are stored here + * @val: The values are stored here or %NULL to return the number of values * @nval: Size of the @val array * * Read an array of u64 properties with @propname from @fwnode and store them to * @val if found. * - * Return: %0 if the property was found (success), + * Return: number of values if @val was %NULL, + * %0 if the property was found (success), * %-EINVAL if given arguments are not valid, * %-ENODATA if the property does not have a value, * %-EPROTO if the property is not an array of numbers, @@ -318,13 +404,14 @@ EXPORT_SYMBOL_GPL(fwnode_property_read_u64_array); * fwnode_property_read_string_array - return string array property of a node * @fwnode: Firmware node to get the property of * @propname: Name of the property - * @val: The values are stored here + * @val: The values are stored here or %NULL to return the number of values * @nval: Size of the @val array * * Read an string list property @propname from the given firmware node and store * them to @val if found. * - * Return: %0 if the property was found (success), + * Return: number of values if @val was %NULL, + * %0 if the property was found (success), * %-EINVAL if given arguments are not valid, * %-ENODATA if the property does not have a value, * %-EPROTO if the property is not an array of strings, @@ -336,13 +423,16 @@ int fwnode_property_read_string_array(struct fwnode_handle *fwnode, size_t nval) { if (is_of_node(fwnode)) - return of_property_read_string_array(of_node(fwnode), propname, - val, nval); + return val ? + of_property_read_string_array(of_node(fwnode), propname, + val, nval) : + of_property_count_strings(of_node(fwnode), propname); else if (is_acpi_node(fwnode)) return acpi_dev_prop_read(acpi_node(fwnode), propname, DEV_PROP_STRING, val, nval); - return -ENXIO; + return pset_prop_read_array(to_pset(fwnode), propname, + DEV_PROP_STRING, val, nval); } EXPORT_SYMBOL_GPL(fwnode_property_read_string_array); |