On 2013-08-05 23:00, H Hartley Sweeten wrote:
DIO subdevices always handle the INSN_CONFIG_DIO_{INPUT,OUTPUT} instructions to configure the dio channels. They also always handle the INSN_CONFIG_DIO_QUERY instruction to query the configuration of a dio channel.Introduce a helper function to handle the (*insn_config) boilerplate for comedi DIO subdevices. This function has the same parameters as (*insn_config) functions with an additional parameter to allow the caller to pass a 'mask' value for grouped dio channels. This function returns: 0 if the instruction was successful but requires additional handling by the caller (INSN_CONFIG_DIO_{INPUT,OUTPUT} insn->n if the instruction was handled (INSN_CONFIG_DIO_QUERY) -EINVAL for all unhandled instructions The caller is responsible for actually configuring the hardware based on the configuration (s->io_bits). Signed-off-by: H Hartley Sweeten <hswee...@visionengravers.com> Cc: Ian Abbott <abbo...@mev.co.uk> Cc: Greg Kroah-Hartman <gre...@linuxfoundation.org>
Reviewed-by: Ian Abbott <abbo...@mev.co.uk> -- -=( Ian Abbott @ MEV Ltd. E-mail: <abbo...@mev.co.uk> )=- -=( Tel: +44 (0)161 477 1898 FAX: +44 (0)161 718 3587 )=- _______________________________________________ devel mailing list de...@linuxdriverproject.org http://driverdev.linuxdriverproject.org/mailman/listinfo/driverdev-devel
