From mboxrd@z Thu Jan 1 00:00:00 1970 From: Arnd Bergmann Subject: Re: [PATCH v4] drivers: soc: sunxi: Introduce SoC driver to map SRAMs Date: Mon, 01 Jun 2015 17:58:26 +0200 Message-ID: <4341126.tsXmi47bFP@wuerfel> References: <1433149466-17013-1-git-send-email-maxime.ripard@free-electrons.com> Reply-To: arnd-r2nGTMty4D4@public.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Return-path: In-Reply-To: <1433149466-17013-1-git-send-email-maxime.ripard-wi1+55ScJUtKEb57/3fJTNBPR1lH4CV8@public.gmane.org> List-Post: , List-Help: , List-Archive: , List-Unsubscribe: , To: linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org Cc: Maxime Ripard , arm-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org, devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-sunxi-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org, Hans de Goede , Chen-Yu Tsai List-Id: devicetree@vger.kernel.org On Monday 01 June 2015 11:04:26 Maxime Ripard wrote: > The Allwinner SoCs have a handful of SRAM that can be either mapped to be > accessible by devices or the CPU. > > That mapping is controlled by an SRAM controller, and that mapping might > not be set by the bootloader, for example if the device wasn't used at all, > or if we're using solutions like the U-Boot's Falcon Boot. > > We could also imagine changing this at runtime for example to change the > mapping of these SRAMs to use them for suspend/resume or runtime memory > rate change, if that ever happens. > > These use cases require some API in the kernel to control that mapping, > exported through a drivers/soc driver. > > This driver also implement a debugfs file that shows the SRAM found in the > system, the current mapping and the SRAM that have been claimed by some > drivers in the kernel. > > Signed-off-by: Maxime Ripard > Acked-by: Arnd Bergmann > Acked-by: Hans de Goede > Tested-by: Hans de Goede > --- > > Hi Arnd, Kevin, Olof, > > Could you please apply directly this patch to your tree? > > It's the only driver related patch that should come in for this release > cycle. > Applied to next/drivers. Thanks for your hard work to get it adapted to all my wishes over your weekend, very much appreciated. Arnd