diff options
Diffstat (limited to 'drivers/base/regmap')
| -rw-r--r-- | drivers/base/regmap/internal.h | 5 | ||||
| -rw-r--r-- | drivers/base/regmap/regmap-debugfs.c | 16 | ||||
| -rw-r--r-- | drivers/base/regmap/regmap.c | 64 |
3 files changed, 67 insertions, 18 deletions
diff --git a/drivers/base/regmap/internal.h b/drivers/base/regmap/internal.h index a0380338946a..2a4435d76028 100644 --- a/drivers/base/regmap/internal.h +++ b/drivers/base/regmap/internal.h @@ -105,8 +105,8 @@ struct regmap { bool defer_caching; - u8 read_flag_mask; - u8 write_flag_mask; + unsigned long read_flag_mask; + unsigned long write_flag_mask; /* number of bits to (left) shift the reg value when formatting*/ int reg_shift; @@ -173,6 +173,7 @@ struct regcache_ops { int (*drop)(struct regmap *map, unsigned int min, unsigned int max); }; +bool regmap_cached(struct regmap *map, unsigned int reg); bool regmap_writeable(struct regmap *map, unsigned int reg); bool regmap_readable(struct regmap *map, unsigned int reg); bool regmap_volatile(struct regmap *map, unsigned int reg); diff --git a/drivers/base/regmap/regmap-debugfs.c b/drivers/base/regmap/regmap-debugfs.c index 1ee3d40861c7..36ce3511c733 100644 --- a/drivers/base/regmap/regmap-debugfs.c +++ b/drivers/base/regmap/regmap-debugfs.c @@ -77,6 +77,17 @@ static void regmap_debugfs_free_dump_cache(struct regmap *map) } } +static bool regmap_printable(struct regmap *map, unsigned int reg) +{ + if (regmap_precious(map, reg)) + return false; + + if (!regmap_readable(map, reg) && !regmap_cached(map, reg)) + return false; + + return true; +} + /* * Work out where the start offset maps into register numbers, bearing * in mind that we suppress hidden registers. @@ -105,8 +116,7 @@ static unsigned int regmap_debugfs_get_dump_start(struct regmap *map, if (list_empty(&map->debugfs_off_cache)) { for (; i <= map->max_register; i += map->reg_stride) { /* Skip unprinted registers, closing off cache entry */ - if (!regmap_readable(map, i) || - regmap_precious(map, i)) { + if (!regmap_printable(map, i)) { if (c) { c->max = p - 1; c->max_reg = i - map->reg_stride; @@ -204,7 +214,7 @@ static ssize_t regmap_read_debugfs(struct regmap *map, unsigned int from, start_reg = regmap_debugfs_get_dump_start(map, from, *ppos, &p); for (i = start_reg; i <= to; i += map->reg_stride) { - if (!regmap_readable(map, i)) + if (!regmap_readable(map, i) && !regmap_cached(map, i)) continue; if (regmap_precious(map, i)) diff --git a/drivers/base/regmap/regmap.c b/drivers/base/regmap/regmap.c index e964d068874d..ae63bb0875ea 100644 --- a/drivers/base/regmap/regmap.c +++ b/drivers/base/regmap/regmap.c @@ -93,6 +93,29 @@ bool regmap_writeable(struct regmap *map, unsigned int reg) return true; } +bool regmap_cached(struct regmap *map, unsigned int reg) +{ + int ret; + unsigned int val; + + if (map->cache == REGCACHE_NONE) + return false; + + if (!map->cache_ops) + return false; + + if (map->max_register && reg > map->max_register) + return false; + + map->lock(map->lock_arg); + ret = regcache_read(map, reg, &val); + map->unlock(map->lock_arg); + if (ret) + return false; + + return true; +} + bool regmap_readable(struct regmap *map, unsigned int reg) { if (!map->reg_read) @@ -749,6 +772,9 @@ struct regmap *__regmap_init(struct device *dev, case REGMAP_ENDIAN_BIG: map->format.format_reg = regmap_format_16_be; break; + case REGMAP_ENDIAN_LITTLE: + map->format.format_reg = regmap_format_16_le; + break; case REGMAP_ENDIAN_NATIVE: map->format.format_reg = regmap_format_16_native; break; @@ -768,6 +794,9 @@ struct regmap *__regmap_init(struct device *dev, case REGMAP_ENDIAN_BIG: map->format.format_reg = regmap_format_32_be; break; + case REGMAP_ENDIAN_LITTLE: + map->format.format_reg = regmap_format_32_le; + break; case REGMAP_ENDIAN_NATIVE: map->format.format_reg = regmap_format_32_native; break; @@ -782,6 +811,9 @@ struct regmap *__regmap_init(struct device *dev, case REGMAP_ENDIAN_BIG: map->format.format_reg = regmap_format_64_be; break; + case REGMAP_ENDIAN_LITTLE: + map->format.format_reg = regmap_format_64_le; + break; case REGMAP_ENDIAN_NATIVE: map->format.format_reg = regmap_format_64_native; break; @@ -1296,12 +1328,26 @@ static int _regmap_select_page(struct regmap *map, unsigned int *reg, return 0; } +static void regmap_set_work_buf_flag_mask(struct regmap *map, int max_bytes, + unsigned long mask) +{ + u8 *buf; + int i; + + if (!mask || !map->work_buf) + return; + + buf = map->work_buf; + + for (i = 0; i < max_bytes; i++) + buf[i] |= (mask >> (8 * i)) & 0xff; +} + int _regmap_raw_write(struct regmap *map, unsigned int reg, const void *val, size_t val_len) { struct regmap_range_node *range; unsigned long flags; - u8 *u8 = map->work_buf; void *work_val = map->work_buf + map->format.reg_bytes + map->format.pad_bytes; void *buf; @@ -1370,8 +1416,8 @@ int _regmap_raw_write(struct regmap *map, unsigned int reg, } map->format.format_reg(map->work_buf, reg, map->reg_shift); - - u8[0] |= map->write_flag_mask; + regmap_set_work_buf_flag_mask(map, map->format.reg_bytes, + map->write_flag_mask); /* * Essentially all I/O mechanisms will be faster with a single @@ -2251,7 +2297,6 @@ 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; WARN_ON(!map->bus); @@ -2268,15 +2313,8 @@ static int _regmap_raw_read(struct regmap *map, unsigned int reg, void *val, } map->format.format_reg(map->work_buf, reg, map->reg_shift); - - /* - * Some buses or devices flag reads by setting the high bits in the - * register address; since it's always the high bits for all - * current formats we can do this here rather than in - * formatting. This may break if we get interesting formats. - */ - u8[0] |= map->read_flag_mask; - + regmap_set_work_buf_flag_mask(map, map->format.reg_bytes, + map->read_flag_mask); trace_regmap_hw_read_start(map, reg, val_len / map->format.val_bytes); ret = map->bus->read(map->bus_context, map->work_buf, |