On 10/01/2014 10:45 AM, Roger Quadros wrote: > On 09/30/2014 07:04 PM, Marc Kleine-Budde wrote: >> On 09/30/2014 05:25 PM, Wolfram Sang wrote: >>> >>>> Yes, but syscon_regmap_lookup_by_phandle() doesn't need any support for >>>> additional parameters. Have a look at: >>>> >>>> drivers/net/ethernet/stmicro/stmmac/dwmac-socfpga.c >>>> >>>> First get the regmap, then the 1st argument is the offset in the regmap, >>>> the 2nd and 3rd could be the bits. >>> >>> So, for one driver the extra arguments are: <reg> <start_bit> <stop_bit> >>> For another driver (the stmmac example): <reg_offset> <reg_shift> >> >> The DCAN's "reg" is a "reg_offset" as in the stmmc. >> >> Roger, can we derive both start and done bit from a common reg_shift? > > I'm sorry I didn't understand what you meant. > > <&syscon_phandl> <reg offset> <start bit> <stop bit> should work well for us. > Even though reg offset is the same for both the DCAN instances. What's start bit and stop bit for instance 0 and 1 on that SoC that has two instances?? Marc -- Pengutronix e.K. | Marc Kleine-Budde | Industrial Linux Solutions | Phone: +49-231-2826-924 | Vertretung West/Dortmund | Fax: +49-5121-206917-5555 | Amtsgericht Hildesheim, HRA 2686 | http://www.pengutronix.de |
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