| From: |
| Philipp Zabel <p.zabel@pengutronix.de> |
| To: |
| linux-kernel@vger.kernel.org |
| Subject: |
| [PATCH v9 0/4] Add generic driver for on-chip SRAM |
| Date: |
| Wed, 13 Feb 2013 16:46:38 +0100 |
| Message-ID: |
| <1360770402-23091-1-git-send-email-p.zabel@pengutronix.de> |
| Cc: |
| Arnd Bergmann <arnd@arndb.de>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Grant Likely <grant.likely@secretlab.ca>,
Rob Herring <rob.herring@calxeda.com>,
Paul Gortmaker <paul.gortmaker@windriver.com>,
Shawn Guo <shawn.guo@linaro.org>,
Richard Zhao <richard.zhao@freescale.com>,
Huang Shijie <shijie8@gmail.com>,
Dong Aisheng <dong.aisheng@linaro.org>,
Matt Porter <mporter@ti.com>,
Fabio Estevam <fabio.estevam@freescale.com>,
Javier Martin <javier.martin@vista-silicon.com>,
kernel@pengutronix.de, devicetree-discuss@lists.ozlabs.org |
| Archive‑link: | |
Article |
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/
