Re: [PATCH v9 RESEND 0/4] Add generic driver for on-chip SRAM

From: Michal Simek
Date: Fri Mar 22 2013 - 08:49:16 EST


Hi Andrew,

2013/3/20 Philipp Zabel <p.zabel@xxxxxxxxxxxxxx>:
> 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(-)

Andrew: 1/4 and 2/4 patches should probably go through your tree.
Can you please handle them?
Or Philipp should send these two patches directly to you?

Thanks,
Michal


--
Michal Simek, Ing. (M.Eng)
w: www.monstr.eu p: +42-0-721842854
Maintainer of Linux kernel - Microblaze cpu - http://www.monstr.eu/fdt/
Maintainer of Linux kernel - Xilinx Zynq ARM architecture
Microblaze U-BOOT custodian and responsible for u-boot arm zynq platform
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