diff options
Diffstat (limited to 'drivers/base/regmap/regmap.c')
| -rw-r--r-- | drivers/base/regmap/regmap.c | 91 |
1 files changed, 51 insertions, 40 deletions
diff --git a/drivers/base/regmap/regmap.c b/drivers/base/regmap/regmap.c index 366b629f4b10..4bb926cd7bf2 100644 --- a/drivers/base/regmap/regmap.c +++ b/drivers/base/regmap/regmap.c @@ -765,59 +765,57 @@ struct regmap *dev_get_regmap(struct device *dev, const char *name) EXPORT_SYMBOL_GPL(dev_get_regmap); static int _regmap_select_page(struct regmap *map, unsigned int *reg, + struct regmap_range_node *range, unsigned int val_num) { - struct regmap_range_node *range; void *orig_work_buf; unsigned int win_offset; unsigned int win_page; bool page_chg; int ret; - range = _regmap_range_lookup(map, *reg); - if (range) { - win_offset = (*reg - range->range_min) % range->window_len; - win_page = (*reg - range->range_min) / range->window_len; + win_offset = (*reg - range->range_min) % range->window_len; + win_page = (*reg - range->range_min) / range->window_len; - if (val_num > 1) { - /* Bulk write shouldn't cross range boundary */ - if (*reg + val_num - 1 > range->range_max) - return -EINVAL; + if (val_num > 1) { + /* Bulk write shouldn't cross range boundary */ + if (*reg + val_num - 1 > range->range_max) + return -EINVAL; - /* ... or single page boundary */ - if (val_num > range->window_len - win_offset) - return -EINVAL; - } + /* ... or single page boundary */ + if (val_num > range->window_len - win_offset) + return -EINVAL; + } - /* It is possible to have selector register inside data window. - In that case, selector register is located on every page and - it needs no page switching, when accessed alone. */ - if (val_num > 1 || - range->window_start + win_offset != range->selector_reg) { - /* Use separate work_buf during page switching */ - orig_work_buf = map->work_buf; - map->work_buf = map->selector_work_buf; + /* It is possible to have selector register inside data window. + In that case, selector register is located on every page and + it needs no page switching, when accessed alone. */ + if (val_num > 1 || + range->window_start + win_offset != range->selector_reg) { + /* Use separate work_buf during page switching */ + orig_work_buf = map->work_buf; + map->work_buf = map->selector_work_buf; - ret = _regmap_update_bits(map, range->selector_reg, - range->selector_mask, - win_page << range->selector_shift, - &page_chg); + ret = _regmap_update_bits(map, range->selector_reg, + range->selector_mask, + win_page << range->selector_shift, + &page_chg); - map->work_buf = orig_work_buf; + map->work_buf = orig_work_buf; - if (ret < 0) - return ret; - } - - *reg = range->window_start + win_offset; + if (ret < 0) + return ret; } + *reg = range->window_start + win_offset; + return 0; } static int _regmap_raw_write(struct regmap *map, unsigned int reg, const void *val, size_t val_len) { + struct regmap_range_node *range; u8 *u8 = map->work_buf; void *buf; int ret = -ENOTSUPP; @@ -852,9 +850,13 @@ static int _regmap_raw_write(struct regmap *map, unsigned int reg, } } - ret = _regmap_select_page(map, ®, val_len / map->format.val_bytes); - if (ret < 0) - return ret; + range = _regmap_range_lookup(map, reg); + if (range) { + ret = _regmap_select_page(map, ®, range, + val_len / map->format.val_bytes); + if (ret < 0) + return ret; + } map->format.format_reg(map->work_buf, reg, map->reg_shift); @@ -903,6 +905,7 @@ static int _regmap_raw_write(struct regmap *map, unsigned int reg, int _regmap_write(struct regmap *map, unsigned int reg, unsigned int val) { + struct regmap_range_node *range; int ret; BUG_ON(!map->format.format_write && !map->format.format_val); @@ -924,9 +927,12 @@ int _regmap_write(struct regmap *map, unsigned int reg, trace_regmap_reg_write(map->dev, reg, val); if (map->format.format_write) { - ret = _regmap_select_page(map, ®, 1); - if (ret < 0) - return ret; + range = _regmap_range_lookup(map, reg); + if (range) { + ret = _regmap_select_page(map, ®, range, 1); + if (ret < 0) + return ret; + } map->format.format_write(map, reg, val); @@ -1082,12 +1088,17 @@ EXPORT_SYMBOL_GPL(regmap_bulk_write); static int _regmap_raw_read(struct regmap *map, unsigned int reg, void *val, unsigned int val_len) { + struct regmap_range_node *range; u8 *u8 = map->work_buf; int ret; - ret = _regmap_select_page(map, ®, val_len / map->format.val_bytes); - if (ret < 0) - return ret; + range = _regmap_range_lookup(map, reg); + if (range) { + ret = _regmap_select_page(map, ®, range, + val_len / map->format.val_bytes); + if (ret < 0) + return ret; + } map->format.format_reg(map->work_buf, reg, map->reg_shift); |
