Hi Tony, On Sat, Feb 26, 2011 at 2:27 AM, Tony Lindgren <tony@xxxxxxxxxxx> wrote: > * Tony Lindgren <tony@xxxxxxxxxxx> [110225 12:42]: >> * Kishore Kadiyala <kishore.kadiyala@xxxxxx> [110225 09:00]: >> > +static int omap_mmc_init(struct omap_hwmod *oh, void *hsmmcinfo) >> ... >> >> > + static int mmc_num; >> > + >> > + c += mmc_num; >> >> This does not look right.. omap2_hsmmc_info is filled in respective board files and will have a call to omap2_hsmmc_init [hsmm.c]. In omap2_hsmmc_init, it will call omap_hwmod_for_each_by_class which takes 3 arguments out of which 2nd one is a callback and 3rd one is void pointer to be passed to call back if necessary. With this the callback "omap_mmc_init" will be called multiple times based on the class entry in hwmod data file for each controller. Say you have 3 controllers as in OMAP3, then "omap_mmc_init" will be called thrice. Here the argument "hsmmcinfo" needs to be incremented for each call, so having a static mmc_num and incrementing it on each call. > > So since mmc_num is static, it gets initialized to 0, then increased > for each call.. What if you want to intialize controller 1 and 3 but > not 2? The current implementation for initialization of MMC controllers will work with any of the below order of devices: 1) MMC1, MMC2, MMC3 2) MMC1, MMC3 3) MMC2, MMC1 4) MMC3, MMC2, MMC1 5) MMC3 .... > > Also, why do you pass void *hsmmcinfo to the function and then cast > it to struct omap2_hsmmc_inf *? Why not pass struct omap2_hsmmc_info * > to start with? Its because the 3rd argument in omap_hwmod_for_each_by_class is void * . > > Regards, > > Tony > Regards, Kishore -- To unsubscribe from this list: send the line "unsubscribe linux-mmc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
