Generic device properties framework updates for v4.11-rc1
Allow built-in (static) device properties to be declared as constant, make it possible to save memory by discarding alternative (but unused) built-in (static) property sets and add support for automatic handling of built-in properties to the I2C code. -----BEGIN PGP SIGNATURE----- Version: GnuPG v2 iQIcBAABCAAGBQJYq3L9AAoJEILEb/54YlRxxIEP/j3uTccEqJ0h8EzdqyxXAdd6 jbKYomuPzVKVOiq6MJFkddikumAq5x9D4DCatoSJb5eCZw/tgq7G3OJZHgzUtJfO t8ggNSEjtHGNIy0HnV4f9GdhcylUXA75C4o7XqOMdkunXzCK0ifF+NkPIxIgCoGl ABjDkmxIaY6Ybax+/Fc3IOvYGzE5gC9kBL1wgTqSEtZyD+CYhb47pvH3HdGBAVqc gxNVmc7ukmOnqTFuQXmmPzNRrVysznn/CKsxpQ3GlTJ+XNvC29XEobeBF3Nnapeu RYlA0IXwJVTK6X4DcZ8rydQ9ikXGXyNo/E/jxWaWBFahULFrjFf1G9WCw+Y+H4DH 2CcxgSTE0ZuPr87Eyg6B9xlBLTbpq55jkiDrn6bSqbKMcMsoa6VZf5HLcW7QbboN kIa0SmZH9dmtqOVU8KE4HYrnkO5tsUZKIlHlP4c72MYH+SJZFweF4XxkAFUE7f7i r87I7NNp5LnILkf/pGEd0vrmfQ4TjU0TqW1upM2qDvtXTk+NDcZvvRGEl1gR/ROY sVhbA6MqbltAcWDAQ1RlmZw+lcSOMhPm/W47qIH8tfInabP2WuIjmtLekrduY4nl x13tnC/1w69ehZz5jGSBhJDgDMUvb8/HQZTKx6Kh2qJhuvd0njT2O0YQwQdISpAC f2+LyYefQbN7SyCMrSab =+P7T -----END PGP SIGNATURE----- Merge tag 'device-properties-4.11-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm Pull device property updates from Rafael J. Wysocki: "Generic device properties framework updates for v4.11-rc1 Allow built-in (static) device properties to be declared as constant, make it possible to save memory by discarding alternative (but unused) built-in (static) property sets and add support for automatic handling of built-in properties to the I2C code" * tag 'device-properties-4.11-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: i2c: allow specify device properties in i2c_board_info device property: export code duplicating array of property entries device property: constify property arrays values device property: allow to constify properties
This commit is contained in:
Linus Torvalds
commit
786856b6d1
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@ -21,7 +21,7 @@
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struct property_set {
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struct fwnode_handle fwnode;
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struct property_entry *properties;
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const struct property_entry *properties;
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};
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static inline bool is_pset_node(struct fwnode_handle *fwnode)
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@ -35,10 +35,10 @@ static inline struct property_set *to_pset_node(struct fwnode_handle *fwnode)
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container_of(fwnode, struct property_set, fwnode) : NULL;
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}
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static struct property_entry *pset_prop_get(struct property_set *pset,
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const char *name)
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static const struct property_entry *pset_prop_get(struct property_set *pset,
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const char *name)
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{
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struct property_entry *prop;
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const struct property_entry *prop;
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if (!pset || !pset->properties)
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return NULL;
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@ -50,11 +50,11 @@ static struct property_entry *pset_prop_get(struct property_set *pset,
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return NULL;
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}
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static void *pset_prop_find(struct property_set *pset, const char *propname,
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size_t length)
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static const void *pset_prop_find(struct property_set *pset,
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const char *propname, size_t length)
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{
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struct property_entry *prop;
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void *pointer;
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const struct property_entry *prop;
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const void *pointer;
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prop = pset_prop_get(pset, propname);
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if (!prop)
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@ -74,7 +74,7 @@ static int pset_prop_read_u8_array(struct property_set *pset,
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const char *propname,
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u8 *values, size_t nval)
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{
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void *pointer;
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const void *pointer;
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size_t length = nval * sizeof(*values);
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pointer = pset_prop_find(pset, propname, length);
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@ -89,7 +89,7 @@ static int pset_prop_read_u16_array(struct property_set *pset,
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const char *propname,
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u16 *values, size_t nval)
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{
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void *pointer;
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const void *pointer;
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size_t length = nval * sizeof(*values);
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pointer = pset_prop_find(pset, propname, length);
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@ -104,7 +104,7 @@ static int pset_prop_read_u32_array(struct property_set *pset,
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const char *propname,
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u32 *values, size_t nval)
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{
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void *pointer;
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const void *pointer;
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size_t length = nval * sizeof(*values);
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pointer = pset_prop_find(pset, propname, length);
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@ -119,7 +119,7 @@ static int pset_prop_read_u64_array(struct property_set *pset,
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const char *propname,
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u64 *values, size_t nval)
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{
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void *pointer;
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const void *pointer;
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size_t length = nval * sizeof(*values);
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pointer = pset_prop_find(pset, propname, length);
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@ -133,7 +133,7 @@ static int pset_prop_read_u64_array(struct property_set *pset,
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static int pset_prop_count_elems_of_size(struct property_set *pset,
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const char *propname, size_t length)
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{
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struct property_entry *prop;
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const struct property_entry *prop;
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prop = pset_prop_get(pset, propname);
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if (!prop)
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@ -146,7 +146,7 @@ static int pset_prop_read_string_array(struct property_set *pset,
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const char *propname,
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const char **strings, size_t nval)
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{
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void *pointer;
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const void *pointer;
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size_t length = nval * sizeof(*strings);
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pointer = pset_prop_find(pset, propname, length);
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@ -160,8 +160,8 @@ static int pset_prop_read_string_array(struct property_set *pset,
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static int pset_prop_read_string(struct property_set *pset,
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const char *propname, const char **strings)
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{
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struct property_entry *prop;
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const char **pointer;
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const struct property_entry *prop;
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const char * const *pointer;
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prop = pset_prop_get(pset, propname);
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if (!prop)
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@ -682,77 +682,64 @@ int fwnode_property_match_string(struct fwnode_handle *fwnode,
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}
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EXPORT_SYMBOL_GPL(fwnode_property_match_string);
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/**
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* pset_free_set - releases memory allocated for copied property set
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* @pset: Property set to release
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*
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* Function takes previously copied property set and releases all the
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* memory allocated to it.
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*/
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static void pset_free_set(struct property_set *pset)
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static int property_copy_string_array(struct property_entry *dst,
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const struct property_entry *src)
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{
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const struct property_entry *prop;
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size_t i, nval;
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char **d;
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size_t nval = src->length / sizeof(*d);
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int i;
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if (!pset)
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return;
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d = kcalloc(nval, sizeof(*d), GFP_KERNEL);
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if (!d)
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return -ENOMEM;
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for (prop = pset->properties; prop->name; prop++) {
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if (prop->is_array) {
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if (prop->is_string && prop->pointer.str) {
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nval = prop->length / sizeof(const char *);
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for (i = 0; i < nval; i++)
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kfree(prop->pointer.str[i]);
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}
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kfree(prop->pointer.raw_data);
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} else if (prop->is_string) {
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kfree(prop->value.str);
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for (i = 0; i < nval; i++) {
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d[i] = kstrdup(src->pointer.str[i], GFP_KERNEL);
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if (!d[i] && src->pointer.str[i]) {
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while (--i >= 0)
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kfree(d[i]);
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kfree(d);
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return -ENOMEM;
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}
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kfree(prop->name);
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}
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kfree(pset->properties);
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kfree(pset);
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dst->pointer.raw_data = d;
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return 0;
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}
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static int pset_copy_entry(struct property_entry *dst,
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const struct property_entry *src)
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static int property_entry_copy_data(struct property_entry *dst,
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const struct property_entry *src)
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{
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const char **d, **s;
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size_t i, nval;
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int error;
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dst->name = kstrdup(src->name, GFP_KERNEL);
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if (!dst->name)
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return -ENOMEM;
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if (src->is_array) {
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if (!src->length)
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return -ENODATA;
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if (!src->length) {
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error = -ENODATA;
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goto out_free_name;
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}
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if (src->is_string) {
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nval = src->length / sizeof(const char *);
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dst->pointer.str = kcalloc(nval, sizeof(const char *),
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GFP_KERNEL);
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if (!dst->pointer.str)
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return -ENOMEM;
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d = dst->pointer.str;
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s = src->pointer.str;
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for (i = 0; i < nval; i++) {
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d[i] = kstrdup(s[i], GFP_KERNEL);
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if (!d[i] && s[i])
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return -ENOMEM;
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}
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error = property_copy_string_array(dst, src);
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if (error)
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goto out_free_name;
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} else {
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dst->pointer.raw_data = kmemdup(src->pointer.raw_data,
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src->length, GFP_KERNEL);
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if (!dst->pointer.raw_data)
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return -ENOMEM;
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if (!dst->pointer.raw_data) {
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error = -ENOMEM;
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goto out_free_name;
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}
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}
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} else if (src->is_string) {
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dst->value.str = kstrdup(src->value.str, GFP_KERNEL);
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if (!dst->value.str && src->value.str)
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return -ENOMEM;
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if (!dst->value.str && src->value.str) {
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error = -ENOMEM;
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goto out_free_name;
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}
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} else {
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dst->value.raw_data = src->value.raw_data;
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}
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@ -762,6 +749,95 @@ static int pset_copy_entry(struct property_entry *dst,
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dst->is_string = src->is_string;
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return 0;
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out_free_name:
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kfree(dst->name);
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return error;
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}
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static void property_entry_free_data(const struct property_entry *p)
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{
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size_t i, nval;
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if (p->is_array) {
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if (p->is_string && p->pointer.str) {
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nval = p->length / sizeof(const char *);
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for (i = 0; i < nval; i++)
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kfree(p->pointer.str[i]);
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}
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kfree(p->pointer.raw_data);
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} else if (p->is_string) {
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kfree(p->value.str);
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}
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kfree(p->name);
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}
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/**
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* property_entries_dup - duplicate array of properties
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* @properties: array of properties to copy
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*
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* This function creates a deep copy of the given NULL-terminated array
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* of property entries.
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*/
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struct property_entry *
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property_entries_dup(const struct property_entry *properties)
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{
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struct property_entry *p;
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int i, n = 0;
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while (properties[n].name)
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n++;
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p = kcalloc(n + 1, sizeof(*p), GFP_KERNEL);
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if (!p)
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return ERR_PTR(-ENOMEM);
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for (i = 0; i < n; i++) {
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int ret = property_entry_copy_data(&p[i], &properties[i]);
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if (ret) {
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while (--i >= 0)
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property_entry_free_data(&p[i]);
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kfree(p);
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return ERR_PTR(ret);
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}
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}
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return p;
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}
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EXPORT_SYMBOL_GPL(property_entries_dup);
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/**
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* property_entries_free - free previously allocated array of properties
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* @properties: array of properties to destroy
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*
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* This function frees given NULL-terminated array of property entries,
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* along with their data.
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*/
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void property_entries_free(const struct property_entry *properties)
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{
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const struct property_entry *p;
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for (p = properties; p->name; p++)
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property_entry_free_data(p);
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kfree(properties);
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}
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EXPORT_SYMBOL_GPL(property_entries_free);
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/**
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* pset_free_set - releases memory allocated for copied property set
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* @pset: Property set to release
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*
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* Function takes previously copied property set and releases all the
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* memory allocated to it.
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*/
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static void pset_free_set(struct property_set *pset)
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{
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if (!pset)
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return;
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property_entries_free(pset->properties);
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kfree(pset);
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}
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/**
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@ -776,32 +852,20 @@ static int pset_copy_entry(struct property_entry *dst,
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*/
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static struct property_set *pset_copy_set(const struct property_set *pset)
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{
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const struct property_entry *entry;
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struct property_entry *properties;
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struct property_set *p;
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size_t i, n = 0;
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|
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p = kzalloc(sizeof(*p), GFP_KERNEL);
|
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if (!p)
|
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return ERR_PTR(-ENOMEM);
|
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|
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while (pset->properties[n].name)
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n++;
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|
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p->properties = kcalloc(n + 1, sizeof(*entry), GFP_KERNEL);
|
||||
if (!p->properties) {
|
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properties = property_entries_dup(pset->properties);
|
||||
if (IS_ERR(properties)) {
|
||||
kfree(p);
|
||||
return ERR_PTR(-ENOMEM);
|
||||
}
|
||||
|
||||
for (i = 0; i < n; i++) {
|
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int ret = pset_copy_entry(&p->properties[i],
|
||||
&pset->properties[i]);
|
||||
if (ret) {
|
||||
pset_free_set(p);
|
||||
return ERR_PTR(ret);
|
||||
}
|
||||
return ERR_CAST(properties);
|
||||
}
|
||||
|
||||
p->properties = properties;
|
||||
return p;
|
||||
}
|
||||
|
||||
|
|
@ -847,7 +911,8 @@ EXPORT_SYMBOL_GPL(device_remove_properties);
|
|||
* @dev as its secondary firmware node. The function takes a copy of
|
||||
* @properties.
|
||||
*/
|
||||
int device_add_properties(struct device *dev, struct property_entry *properties)
|
||||
int device_add_properties(struct device *dev,
|
||||
const struct property_entry *properties)
|
||||
{
|
||||
struct property_set *p, pset;
|
||||
|
||||
|
|
|
|||
|
|
@ -1336,15 +1336,29 @@ i2c_new_device(struct i2c_adapter *adap, struct i2c_board_info const *info)
|
|||
client->dev.fwnode = info->fwnode;
|
||||
|
||||
i2c_dev_set_name(adap, client);
|
||||
|
||||
if (info->properties) {
|
||||
status = device_add_properties(&client->dev, info->properties);
|
||||
if (status) {
|
||||
dev_err(&adap->dev,
|
||||
"Failed to add properties to client %s: %d\n",
|
||||
client->name, status);
|
||||
goto out_err;
|
||||
}
|
||||
}
|
||||
|
||||
status = device_register(&client->dev);
|
||||
if (status)
|
||||
goto out_err;
|
||||
goto out_free_props;
|
||||
|
||||
dev_dbg(&adap->dev, "client [%s] registered with bus id %s\n",
|
||||
client->name, dev_name(&client->dev));
|
||||
|
||||
return client;
|
||||
|
||||
out_free_props:
|
||||
if (info->properties)
|
||||
device_remove_properties(&client->dev);
|
||||
out_err:
|
||||
dev_err(&adap->dev,
|
||||
"Failed to register i2c client %s at 0x%02x (%d)\n",
|
||||
|
|
|
|||
|
|
@ -51,6 +51,7 @@ enum i2c_slave_event;
|
|||
typedef int (*i2c_slave_cb_t)(struct i2c_client *, enum i2c_slave_event, u8 *);
|
||||
|
||||
struct module;
|
||||
struct property_entry;
|
||||
|
||||
#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
|
||||
/*
|
||||
|
|
@ -299,6 +300,7 @@ static inline int i2c_slave_event(struct i2c_client *client,
|
|||
* @archdata: copied into i2c_client.dev.archdata
|
||||
* @of_node: pointer to OpenFirmware device node
|
||||
* @fwnode: device node supplied by the platform firmware
|
||||
* @properties: additional device properties for the device
|
||||
* @irq: stored in i2c_client.irq
|
||||
*
|
||||
* I2C doesn't actually support hardware probing, although controllers and
|
||||
|
|
@ -320,6 +322,7 @@ struct i2c_board_info {
|
|||
struct dev_archdata *archdata;
|
||||
struct device_node *of_node;
|
||||
struct fwnode_handle *fwnode;
|
||||
const struct property_entry *properties;
|
||||
int irq;
|
||||
};
|
||||
|
||||
|
|
|
|||
|
|
@ -160,12 +160,12 @@ struct property_entry {
|
|||
bool is_string;
|
||||
union {
|
||||
union {
|
||||
void *raw_data;
|
||||
u8 *u8_data;
|
||||
u16 *u16_data;
|
||||
u32 *u32_data;
|
||||
u64 *u64_data;
|
||||
const char **str;
|
||||
const void *raw_data;
|
||||
const u8 *u8_data;
|
||||
const u16 *u16_data;
|
||||
const u32 *u32_data;
|
||||
const u64 *u64_data;
|
||||
const char * const *str;
|
||||
} pointer;
|
||||
union {
|
||||
unsigned long long raw_data;
|
||||
|
|
@ -241,8 +241,13 @@ struct property_entry {
|
|||
.name = _name_, \
|
||||
}
|
||||
|
||||
struct property_entry *
|
||||
property_entries_dup(const struct property_entry *properties);
|
||||
|
||||
void property_entries_free(const struct property_entry *properties);
|
||||
|
||||
int device_add_properties(struct device *dev,
|
||||
struct property_entry *properties);
|
||||
const struct property_entry *properties);
|
||||
void device_remove_properties(struct device *dev);
|
||||
|
||||
bool device_dma_supported(struct device *dev);
|
||||
|
|
|
|||
Loading…
Reference in New Issue