diff options
Diffstat (limited to 'drivers/base')
| -rw-r--r-- | drivers/base/Kconfig | 25 | ||||
| -rw-r--r-- | drivers/base/cacheinfo.c | 13 | ||||
| -rw-r--r-- | drivers/base/isa.c | 10 | ||||
| -rw-r--r-- | drivers/base/power/main.c | 15 | ||||
| -rw-r--r-- | drivers/base/power/runtime.c | 3 | ||||
| -rw-r--r-- | drivers/base/regmap/internal.h | 8 | ||||
| -rw-r--r-- | drivers/base/regmap/regcache-flat.c | 15 | ||||
| -rw-r--r-- | drivers/base/regmap/regmap-debugfs.c | 12 | ||||
| -rw-r--r-- | drivers/base/regmap/regmap.c | 34 |
9 files changed, 106 insertions, 29 deletions
diff --git a/drivers/base/Kconfig b/drivers/base/Kconfig index 2f6614c9a229..bdc87907d6a1 100644 --- a/drivers/base/Kconfig +++ b/drivers/base/Kconfig @@ -91,22 +91,23 @@ config FIRMWARE_IN_KERNEL depends on FW_LOADER default y help - The kernel source tree includes a number of firmware 'blobs' - that are used by various drivers. The recommended way to - use these is to run "make firmware_install", which, after - converting ihex files to binary, copies all of the needed - binary files in firmware/ to /lib/firmware/ on your system so - that they can be loaded by userspace helpers on request. + Various drivers in the kernel source tree may require firmware, + which is generally available in your distribution's linux-firmware + package. + + The linux-firmware package should install firmware into + /lib/firmware/ on your system, so they can be loaded by userspace + helpers on request. Enabling this option will build each required firmware blob - into the kernel directly, where request_firmware() will find - them without having to call out to userspace. This may be - useful if your root file system requires a device that uses - such firmware and do not wish to use an initrd. + specified by EXTRA_FIRMWARE into the kernel directly, where + request_firmware() will find them without having to call out to + userspace. This may be useful if your root file system requires a + device that uses such firmware and you do not wish to use an + initrd. This single option controls the inclusion of firmware for - every driver that uses request_firmware() and ships its - firmware in the kernel source tree, which avoids a + every driver that uses request_firmware(), which avoids a proliferation of 'Include firmware for xxx device' options. Say 'N' and let firmware be loaded from userspace. diff --git a/drivers/base/cacheinfo.c b/drivers/base/cacheinfo.c index eb3af2739537..07532d83be0b 100644 --- a/drivers/base/cacheinfo.c +++ b/drivers/base/cacheinfo.c @@ -186,6 +186,11 @@ static void cache_associativity(struct cacheinfo *this_leaf) this_leaf->ways_of_associativity = (size / nr_sets) / line_size; } +static bool cache_node_is_unified(struct cacheinfo *this_leaf) +{ + return of_property_read_bool(this_leaf->of_node, "cache-unified"); +} + static void cache_of_override_properties(unsigned int cpu) { int index; @@ -194,6 +199,14 @@ static void cache_of_override_properties(unsigned int cpu) for (index = 0; index < cache_leaves(cpu); index++) { this_leaf = this_cpu_ci->info_list + index; + /* + * init_cache_level must setup the cache level correctly + * overriding the architecturally specified levels, so + * if type is NONE at this stage, it should be unified + */ + if (this_leaf->type == CACHE_TYPE_NOCACHE && + cache_node_is_unified(this_leaf)) + this_leaf->type = CACHE_TYPE_UNIFIED; cache_size(this_leaf); cache_get_line_size(this_leaf); cache_nr_sets(this_leaf); diff --git a/drivers/base/isa.c b/drivers/base/isa.c index cd6ccdcf9df0..372d10af2600 100644 --- a/drivers/base/isa.c +++ b/drivers/base/isa.c @@ -39,7 +39,7 @@ static int isa_bus_probe(struct device *dev) { struct isa_driver *isa_driver = dev->platform_data; - if (isa_driver->probe) + if (isa_driver && isa_driver->probe) return isa_driver->probe(dev, to_isa_dev(dev)->id); return 0; @@ -49,7 +49,7 @@ static int isa_bus_remove(struct device *dev) { struct isa_driver *isa_driver = dev->platform_data; - if (isa_driver->remove) + if (isa_driver && isa_driver->remove) return isa_driver->remove(dev, to_isa_dev(dev)->id); return 0; @@ -59,7 +59,7 @@ static void isa_bus_shutdown(struct device *dev) { struct isa_driver *isa_driver = dev->platform_data; - if (isa_driver->shutdown) + if (isa_driver && isa_driver->shutdown) isa_driver->shutdown(dev, to_isa_dev(dev)->id); } @@ -67,7 +67,7 @@ static int isa_bus_suspend(struct device *dev, pm_message_t state) { struct isa_driver *isa_driver = dev->platform_data; - if (isa_driver->suspend) + if (isa_driver && isa_driver->suspend) return isa_driver->suspend(dev, to_isa_dev(dev)->id, state); return 0; @@ -77,7 +77,7 @@ static int isa_bus_resume(struct device *dev) { struct isa_driver *isa_driver = dev->platform_data; - if (isa_driver->resume) + if (isa_driver && isa_driver->resume) return isa_driver->resume(dev, to_isa_dev(dev)->id); return 0; diff --git a/drivers/base/power/main.c b/drivers/base/power/main.c index db2f04415927..08744b572af6 100644 --- a/drivers/base/power/main.c +++ b/drivers/base/power/main.c @@ -526,6 +526,21 @@ static void dpm_watchdog_clear(struct dpm_watchdog *wd) /*------------------------- Resume routines -------------------------*/ /** + * dev_pm_skip_next_resume_phases - Skip next system resume phases for device. + * @dev: Target device. + * + * Make the core skip the "early resume" and "resume" phases for @dev. + * + * This function can be called by middle-layer code during the "noirq" phase of + * system resume if necessary, but not by device drivers. + */ +void dev_pm_skip_next_resume_phases(struct device *dev) +{ + dev->power.is_late_suspended = false; + dev->power.is_suspended = false; +} + +/** * device_resume_noirq - Execute a "noirq resume" callback for given device. * @dev: Device to handle. * @state: PM transition of the system being carried out. diff --git a/drivers/base/power/runtime.c b/drivers/base/power/runtime.c index 027d159ac381..6e89b51ea3d9 100644 --- a/drivers/base/power/runtime.c +++ b/drivers/base/power/runtime.c @@ -276,7 +276,8 @@ static int rpm_get_suppliers(struct device *dev) continue; retval = pm_runtime_get_sync(link->supplier); - if (retval < 0) { + /* Ignore suppliers with disabled runtime PM. */ + if (retval < 0 && retval != -EACCES) { pm_runtime_put_noidle(link->supplier); return retval; } diff --git a/drivers/base/regmap/internal.h b/drivers/base/regmap/internal.h index 8641183cac2f..53785e0e297a 100644 --- a/drivers/base/regmap/internal.h +++ b/drivers/base/regmap/internal.h @@ -77,6 +77,7 @@ struct regmap { int async_ret; #ifdef CONFIG_DEBUG_FS + bool debugfs_disable; struct dentry *debugfs; const char *debugfs_name; @@ -215,10 +216,17 @@ struct regmap_field { extern void regmap_debugfs_initcall(void); extern void regmap_debugfs_init(struct regmap *map, const char *name); extern void regmap_debugfs_exit(struct regmap *map); + +static inline void regmap_debugfs_disable(struct regmap *map) +{ + map->debugfs_disable = true; +} + #else static inline void regmap_debugfs_initcall(void) { } static inline void regmap_debugfs_init(struct regmap *map, const char *name) { } static inline void regmap_debugfs_exit(struct regmap *map) { } +static inline void regmap_debugfs_disable(struct regmap *map) { } #endif /* regcache core declarations */ diff --git a/drivers/base/regmap/regcache-flat.c b/drivers/base/regmap/regcache-flat.c index 4d2e50bfc726..bc6cd88b8cc6 100644 --- a/drivers/base/regmap/regcache-flat.c +++ b/drivers/base/regmap/regcache-flat.c @@ -37,9 +37,12 @@ static int regcache_flat_init(struct regmap *map) cache = map->cache; - for (i = 0; i < map->num_reg_defaults; i++) - cache[regcache_flat_get_index(map, map->reg_defaults[i].reg)] = - map->reg_defaults[i].def; + for (i = 0; i < map->num_reg_defaults; i++) { + unsigned int reg = map->reg_defaults[i].reg; + unsigned int index = regcache_flat_get_index(map, reg); + + cache[index] = map->reg_defaults[i].def; + } return 0; } @@ -56,8 +59,9 @@ static int regcache_flat_read(struct regmap *map, unsigned int reg, unsigned int *value) { unsigned int *cache = map->cache; + unsigned int index = regcache_flat_get_index(map, reg); - *value = cache[regcache_flat_get_index(map, reg)]; + *value = cache[index]; return 0; } @@ -66,8 +70,9 @@ static int regcache_flat_write(struct regmap *map, unsigned int reg, unsigned int value) { unsigned int *cache = map->cache; + unsigned int index = regcache_flat_get_index(map, reg); - cache[regcache_flat_get_index(map, reg)] = value; + cache[index] = value; return 0; } diff --git a/drivers/base/regmap/regmap-debugfs.c b/drivers/base/regmap/regmap-debugfs.c index 36ce3511c733..f3266334063e 100644 --- a/drivers/base/regmap/regmap-debugfs.c +++ b/drivers/base/regmap/regmap-debugfs.c @@ -529,6 +529,18 @@ void regmap_debugfs_init(struct regmap *map, const char *name) struct regmap_range_node *range_node; const char *devname = "dummy"; + /* + * Userspace can initiate reads from the hardware over debugfs. + * Normally internal regmap structures and buffers are protected with + * a mutex or a spinlock, but if the regmap owner decided to disable + * all locking mechanisms, this is no longer the case. For safety: + * don't create the debugfs entries if locking is disabled. + */ + if (map->debugfs_disable) { + dev_dbg(map->dev, "regmap locking disabled - not creating debugfs entries\n"); + return; + } + /* If we don't have the debugfs root yet, postpone init */ if (!regmap_debugfs_root) { struct regmap_debugfs_node *node; diff --git a/drivers/base/regmap/regmap.c b/drivers/base/regmap/regmap.c index d23a5c99b639..ee302ccdfbc8 100644 --- a/drivers/base/regmap/regmap.c +++ b/drivers/base/regmap/regmap.c @@ -457,6 +457,11 @@ static void regmap_unlock_hwlock_irqrestore(void *__map) hwspin_unlock_irqrestore(map->hwlock, &map->spinlock_flags); } +static void regmap_lock_unlock_none(void *__map) +{ + +} + static void regmap_lock_mutex(void *__map) { struct regmap *map = __map; @@ -667,7 +672,18 @@ struct regmap *__regmap_init(struct device *dev, goto err; } - if (config->lock && config->unlock) { + if (config->name) { + map->name = kstrdup_const(config->name, GFP_KERNEL); + if (!map->name) { + ret = -ENOMEM; + goto err_map; + } + } + + if (config->disable_locking) { + map->lock = map->unlock = regmap_lock_unlock_none; + regmap_debugfs_disable(map); + } else if (config->lock && config->unlock) { map->lock = config->lock; map->unlock = config->unlock; map->lock_arg = config->lock_arg; @@ -675,7 +691,7 @@ struct regmap *__regmap_init(struct device *dev, map->hwlock = hwspin_lock_request_specific(config->hwlock_id); if (!map->hwlock) { ret = -ENXIO; - goto err_map; + goto err_name; } switch (config->hwlock_mode) { @@ -755,14 +771,15 @@ struct regmap *__regmap_init(struct device *dev, map->volatile_reg = config->volatile_reg; map->precious_reg = config->precious_reg; map->cache_type = config->cache_type; - map->name = config->name; spin_lock_init(&map->async_lock); INIT_LIST_HEAD(&map->async_list); INIT_LIST_HEAD(&map->async_free); init_waitqueue_head(&map->async_waitq); - if (config->read_flag_mask || config->write_flag_mask) { + if (config->read_flag_mask || + config->write_flag_mask || + config->zero_flag_mask) { map->read_flag_mask = config->read_flag_mask; map->write_flag_mask = config->write_flag_mask; } else if (bus) { @@ -1111,6 +1128,8 @@ err_range: err_hwlock: if (map->hwlock) hwspin_lock_free(map->hwlock); +err_name: + kfree_const(map->name); err_map: kfree(map); err: @@ -1300,6 +1319,7 @@ void regmap_exit(struct regmap *map) } if (map->hwlock) hwspin_lock_free(map->hwlock); + kfree_const(map->name); kfree(map); } EXPORT_SYMBOL_GPL(regmap_exit); @@ -2416,13 +2436,15 @@ static int _regmap_bus_read(void *context, unsigned int reg, { int ret; struct regmap *map = context; + void *work_val = map->work_buf + map->format.reg_bytes + + map->format.pad_bytes; if (!map->format.parse_val) return -EINVAL; - ret = _regmap_raw_read(map, reg, map->work_buf, map->format.val_bytes); + ret = _regmap_raw_read(map, reg, work_val, map->format.val_bytes); if (ret == 0) - *val = map->format.parse_val(map->work_buf); + *val = map->format.parse_val(work_val); return ret; } |