diff options
| author | David Jander <david@protonic.nl> | 2013-09-02 09:46:11 +0200 |
|---|---|---|
| committer | Lee Jones <lee.jones@linaro.org> | 2013-10-23 16:20:32 +0100 |
| commit | 43e30f23b589642a7eaff005bc30444a5247976c (patch) | |
| tree | a8c467e71306d5cea46c52ecd795839bb7438832 /include/linux/mfd | |
| parent | 61e6cfa80de5760bbe406f4e815b7739205754d2 (diff) | |
| download | blackbird-op-linux-43e30f23b589642a7eaff005bc30444a5247976c.tar.gz blackbird-op-linux-43e30f23b589642a7eaff005bc30444a5247976c.zip | |
mfd: da9052: Avoid multiwrite mode due to silicon errata
DA9053 (up to revision bc) can corrupt internal registers when multi-write
mode is enabled and power is removed or during shutdown.
Signed-off-by: David Jander <david@protonic.nl>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Diffstat (limited to 'include/linux/mfd')
| -rw-r--r-- | include/linux/mfd/da9052/da9052.h | 20 |
1 files changed, 14 insertions, 6 deletions
diff --git a/include/linux/mfd/da9052/da9052.h b/include/linux/mfd/da9052/da9052.h index 786d02eb79d2..21e21b81cc75 100644 --- a/include/linux/mfd/da9052/da9052.h +++ b/include/linux/mfd/da9052/da9052.h @@ -148,10 +148,15 @@ static inline int da9052_group_read(struct da9052 *da9052, unsigned char reg, unsigned reg_cnt, unsigned char *val) { int ret; + unsigned int tmp; + int i; - ret = regmap_bulk_read(da9052->regmap, reg, val, reg_cnt); - if (ret < 0) - return ret; + for (i = 0; i < reg_cnt; i++) { + ret = regmap_read(da9052->regmap, reg + i, &tmp); + val[i] = (unsigned char)tmp; + if (ret < 0) + return ret; + } if (da9052->fix_io) { ret = da9052->fix_io(da9052, reg); @@ -166,10 +171,13 @@ static inline int da9052_group_write(struct da9052 *da9052, unsigned char reg, unsigned reg_cnt, unsigned char *val) { int ret; + int i; - ret = regmap_raw_write(da9052->regmap, reg, val, reg_cnt); - if (ret < 0) - return ret; + for (i = 0; i < reg_cnt; i++) { + ret = regmap_write(da9052->regmap, reg + i, val[i]); + if (ret < 0) + return ret; + } if (da9052->fix_io) { ret = da9052->fix_io(da9052, reg); |
