diff options
| -rw-r--r-- | drivers/base/regmap/regmap.c | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/drivers/base/regmap/regmap.c b/drivers/base/regmap/regmap.c index 1cf721421be..f8a937654af 100644 --- a/drivers/base/regmap/regmap.c +++ b/drivers/base/regmap/regmap.c @@ -21,6 +21,18 @@ #include "internal.h" +/* + * Sometimes for failures during very early init the trace + * infrastructure isn't available early enough to be used. For this + * sort of problem defining LOG_DEVICE will add printks for basic + * register I/O on a specific device. + */ +#undef LOG_DEVICE + +static int _regmap_update_bits(struct regmap *map, unsigned int reg, + unsigned int mask, unsigned int val, + bool *change); + bool regmap_writeable(struct regmap *map, unsigned int reg) { if (map->max_register && reg > map->max_register) @@ -700,6 +712,11 @@ int _regmap_write(struct regmap *map, unsigned int reg, } } +#ifdef LOG_DEVICE + if (strcmp(dev_name(map->dev), LOG_DEVICE) == 0) + dev_info(map->dev, "%x <= %x\n", reg, val); +#endif + trace_regmap_reg_write(map->dev, reg, val); if (map->format.format_write) { @@ -903,6 +920,12 @@ static int _regmap_read(struct regmap *map, unsigned int reg, ret = _regmap_raw_read(map, reg, map->work_buf, map->format.val_bytes); if (ret == 0) { *val = map->format.parse_val(map->work_buf); + +#ifdef LOG_DEVICE + if (strcmp(dev_name(map->dev), LOG_DEVICE) == 0) + dev_info(map->dev, "%x => %x\n", reg, *val); +#endif + trace_regmap_reg_read(map->dev, reg, *val); } |