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| author | Ben Sen <0.x29a.0@gmail.com> | 2016-05-01 23:23:33 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2016-05-01 14:37:49 -0700 |
| commit | 0a19f129d71f18e73249d54de96c835186b8607e (patch) | |
| tree | 70932d81781981285d03768deaf0bc8fb4cfd36b /drivers/w1/w1.h | |
| parent | ae53e3740036b5350c4a10dc6fd00fbe3f5134ff (diff) | |
| download | lwn-0a19f129d71f18e73249d54de96c835186b8607e.tar.gz lwn-0a19f129d71f18e73249d54de96c835186b8607e.zip | |
w1: add ability to set (SRAM) and store (EEPROM) configuration for temp sensors like DS18B20
Since many temperature sensors come "preconfigured" with a lower
precision, people are stuck at that precision when running on a kernel
based device (unlike the Dallas 1Wire library for e.g. Arduino, which
supports writing the configuration/scratchpad). This patch adds write
support for the scratchpad/precision registers via w1_slave sysfs.
Signed-off-by: Ben Sen <0.x29a.0@gmail.com>
Acked-by: Evgeniy Polyakov <zbr@ioremap.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/w1/w1.h')
| -rw-r--r-- | drivers/w1/w1.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/w1/w1.h b/drivers/w1/w1.h index 56a49ba41d83..129895f562b0 100644 --- a/drivers/w1/w1.h +++ b/drivers/w1/w1.h @@ -58,6 +58,8 @@ struct w1_reg_num #define W1_ALARM_SEARCH 0xEC #define W1_CONVERT_TEMP 0x44 #define W1_SKIP_ROM 0xCC +#define W1_COPY_SCRATCHPAD 0x48 +#define W1_WRITE_SCRATCHPAD 0x4E #define W1_READ_SCRATCHPAD 0xBE #define W1_READ_ROM 0x33 #define W1_READ_PSUPPLY 0xB4 |