The usual pattern to allocate the necessary space for an array of properties is to count them first by calling: count = device_property_read_uXX_array(dev, propname, NULL, 0); if (count < 0) return count; Introduce helpers device_property_count_uXX() to count items by supplying hard coded last two parameters to device_property_readXX_array().
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| @@ -148,6 +148,26 @@ static inline int device_property_read_u64(struct device *dev, · 147 unmodified lines | ||
| 148 | 148 | return device_property_read_u64_array(dev, propname, val, 1); |
| 149 | 149 | } |
| 150 | 150 | |
| 151 | +static inline int device_property_count_u8(struct device *dev, const char *propname) | |
| 152 | +{ | |
| 153 | + return device_property_read_u8_array(dev, propname, NULL, 0); | |
| 154 | +} | |
| 155 | + | |
| 156 | +static inline int device_property_count_u16(struct device *dev, const char *propname) | |
| 157 | +{ | |
| 158 | + return device_property_read_u16_array(dev, propname, NULL, 0); | |
| 159 | +} | |
| 160 | + | |
| 161 | +static inline int device_property_count_u32(struct device *dev, const char *propname) | |
| 162 | +{ | |
| 163 | + return device_property_read_u32_array(dev, propname, NULL, 0); | |
| 164 | +} | |
| 165 | + | |
| 166 | +static inline int device_property_count_u64(struct device *dev, const char *propname) | |
| 167 | +{ | |
| 168 | + return device_property_read_u64_array(dev, propname, NULL, 0); | |
| 169 | +} | |
| 170 | + | |
| 151 | 171 | static inline bool fwnode_property_read_bool(const struct fwnode_handle *fwnode, |
| 152 | 172 | const char *propname) |
| 153 | 173 | { |
| @@ -178,6 +198,30 @@ static inline int fwnode_property_read_u64(const struct fwnode_handle *fwnode, · 24 unmodified lines | ||
| 178 | 198 | return fwnode_property_read_u64_array(fwnode, propname, val, 1); |
| 179 | 199 | } |
| 180 | 200 | |
| 201 | +static inline int fwnode_property_count_u8(const struct fwnode_handle *fwnode, | |
| 202 | + const char *propname) | |
| 203 | +{ | |
| 204 | + return fwnode_property_read_u8_array(fwnode, propname, NULL, 0); | |
| 205 | +} | |
| 206 | + | |
| 207 | +static inline int fwnode_property_count_u16(const struct fwnode_handle *fwnode, | |
| 208 | + const char *propname) | |
| 209 | +{ | |
| 210 | + return fwnode_property_read_u16_array(fwnode, propname, NULL, 0); | |
| 211 | +} | |
| 212 | + | |
| 213 | +static inline int fwnode_property_count_u32(const struct fwnode_handle *fwnode, | |
| 214 | + const char *propname) | |
| 215 | +{ | |
| 216 | + return fwnode_property_read_u32_array(fwnode, propname, NULL, 0); | |
| 217 | +} | |
| 218 | + | |
| 219 | +static inline int fwnode_property_count_u64(const struct fwnode_handle *fwnode, | |
| 220 | + const char *propname) | |
| 221 | +{ | |
| 222 | + return fwnode_property_read_u64_array(fwnode, propname, NULL, 0); | |
| 223 | +} | |
| 224 | + | |
| 181 | 225 | /** |
| 182 | 226 | * struct property_entry - "Built-in" device property representation. |
| 183 | 227 | * @name: Name of the property. |