staging: comedi: das16m1: don't calc pacer divisors twice
The analog input async command can use the pacer for the convert_src. The (*do_cmdtest) calculates the divisors when validating the cmd argument. There is no reason to recalc the divisors in the (*do_cmd). Just use the values from the private data. Refactor das16m1_set_pacer() to use the i8254_set_mode() and i8254_write() helpers instead of i8254_load(). This allows us to use the I8254_* defines when setting the mode to clarify the code. Tidy up das16m1_cmd_exec() a bit. The pacer only needs to be set when the convert_src is TRIG_TIMER. Signed-off-by: NH Hartley Sweeten <hsweeten@visionengravers.com> Reviewed-by: NIan Abbott <abbotti@mev.co.uk> Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Showing
想要评论请 注册 或 登录