| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Date: Tue, 06 Sep 2011 12:14:48 +0100 From: Jonathan Cameron <jic23@....ac.uk> To: Mark Brown <broonie@...nsource.wolfsonmicro.com> CC: LKML <linux-kernel@...r.kernel.org> Subject: Blockers on IIO usage of regmap. Hi Mark, Just a quick heads up that the big blocker for us making more use of regmap is lack of default control of cs_change for spi buses. That leads to a lot of hand crafted spi read / write routines and is rather tedious. When I have the time I'll look into sorting that side out. Also, we will need a couple of variants of bulk read for spi. Classic ones are TX Add0...Add7 XXXXXXXXXXX XXXXXXXXXXX XXXXXXXX RX XXXXXXXXXXX Da0.....Da7 Db0.....Db7 etc TX Add0...Add7 XXXXXXXXXXX XXXXXXXXXXX XXXXXXXXXX RX XXXXXXXXXXX XXXXXXXXXXX Da0.....Da7 Db0....Db7 TX Ada0...Ada7 Adb1...Adb7 Adc1...Adc7 etc RX XXXXXXXXXXX Da0.....Da7 Db0.....Db7 etc Last one is a kind of 'simulated' bulk read where address is simply incremented (just for complexity that increment may well be by 2 rather than one...) That one is only sort of a 'bulk' read, but rather common. So basically we need some bus specific 'mode' hook somewhere. Given we have separate init functions for the buses could we add a struct regmap_spi_config to the parameter list? IIRC IIO has several drivers in each of the above categories so sharing the code via regmap would be great! What do you think? Jonathan -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Powered by blists - more mailing lists