]> git.baikalelectronics.ru Git - kernel.git/commit
i2c: designware: detect when dynamic tar update is possible
authorLucas De Marchi <lucas.demarchi@intel.com>
Tue, 23 Aug 2016 22:18:55 +0000 (19:18 -0300)
committerWolfram Sang <wsa@the-dreams.de>
Thu, 25 Aug 2016 22:42:15 +0000 (00:42 +0200)
commit2ce695a3b00e92a9ea57156cf27b15878f211088
treeb74bd520f0884c407bc4bb078218af63f558aa03
parent142546ac8471a71d62adb5d79a20cdca73486e21
i2c: designware: detect when dynamic tar update is possible

This adapter can be synthesized with dynamic tar update enabled or disabled.
When enabled it is not necessary to disable the adapter to change the slave
address in some situations, which saves some time per transaction.

There is no direct register to know if this feature is enabled but we can do it
indirectly by writing to the 10BIT_ADDR field in IC_CON: this field is
read only when dynamic tar update is enabled.

Signed-off-by: Lucas De Marchi <lucas.demarchi@intel.com>
Signed-off-by: José Roberto de Souza <jose.souza@intel.com>
Acked-by: Jarkko Nikula <jarkko.nikula@linux.intel.com>
Tested-by: Christian Ruppert <christian.ruppert@alitech.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
drivers/i2c/busses/i2c-designware-core.c
drivers/i2c/busses/i2c-designware-core.h