Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756340Ab3CTKxA (ORCPT ); Wed, 20 Mar 2013 06:53:00 -0400 Received: from metis.ext.pengutronix.de ([92.198.50.35]:37968 "EHLO metis.ext.pengutronix.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755500Ab3CTKw6 (ORCPT ); Wed, 20 Mar 2013 06:52:58 -0400 From: Philipp Zabel To: linux-kernel@vger.kernel.org Cc: Arnd Bergmann , Greg Kroah-Hartman , Grant Likely , Rob Herring , Paul Gortmaker , Shawn Guo , Huang Shijie , Dong Aisheng , Matt Porter , Fabio Estevam , Javier Martin , kernel@pengutronix.de, devicetree-discuss@lists.ozlabs.org Subject: [PATCH v9 RESEND 0/4] Add generic driver for on-chip SRAM Date: Wed, 20 Mar 2013 11:52:43 +0100 Message-Id: <1363776767-2635-1-git-send-email-p.zabel@pengutronix.de> X-Mailer: git-send-email 1.8.2.rc2 X-SA-Exim-Connect-IP: 10.1.0.7 X-SA-Exim-Mail-From: p.zabel@pengutronix.de X-SA-Exim-Scanned: No (on metis.ext.pengutronix.de); SAEximRunCond expanded to false X-PTX-Original-Recipient: linux-kernel@vger.kernel.org Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2204 Lines: 53 Hi, last time I posted was a bit close to the merge window, so I'm reposting now. Greg, Arnd, could you take the first two patches? These patches add support to configure on-chip SRAM via device-tree node or platform data and to obtain the resulting genalloc pool from the struct device pointer or a phandle pointing at the device tree node. This allows drivers to allocate SRAM with the genalloc API without hard-coding the genalloc pool pointer. The on-chip SRAM on i.MX53 and i.MX6q can be registered via device tree and changed to use the simple generic SRAM driver: ocram: ocram@00900000 { compatible = "fsl,imx-ocram", "mmio-sram"; reg = <0x00900000 0x3f000>; }; A driver that needs to allocate SRAM buffers, like the video processing unit on i.MX53, can retrieve the genalloc pool from a phandle in the device tree using of_get_named_gen_pool(node, "iram", 0) from patch 1: vpu@63ff4000 { /* ... */ iram = <&ocram>; }; Changes since v8: - The sram driver now matches against the "mmio-sram" compatible string. - Removed a whitespace error in the device tree binding documentation. regards Philipp --- Documentation/devicetree/bindings/media/coda.txt | 30 ++++++ Documentation/devicetree/bindings/misc/sram.txt | 16 +++ arch/arm/boot/dts/imx53.dtsi | 5 + arch/arm/boot/dts/imx6q.dtsi | 6 ++ drivers/media/platform/Kconfig | 1 - drivers/media/platform/coda.c | 45 +++++--- drivers/misc/Kconfig | 9 ++ drivers/misc/Makefile | 1 + drivers/misc/sram.c | 121 ++++++++++++++++++++++ include/linux/genalloc.h | 15 +++ include/linux/platform_data/coda.h | 18 ++++ lib/genalloc.c | 81 +++++++++++++++ 12 files changed, 333 insertions(+), 15 deletions(-) -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/