| Message ID | 1433254.MeOmJHi2Mt@phil |
|---|---|
| State | Superseded, archived |
| Headers | show |
On Wed, Jan 15, 2014 at 3:40 PM, Heiko Stübner <heiko@sntech.de> wrote: > Some SoCs need parts of their sram for special purposes. So while being part > of the peripheral, it should not be part of the genpool controlling the sram. > > Therefore add an option mmio-sram-reserved to keep arbitrary portions of the > sram from general usage. > > Suggested-by: Rob Herring <robherring2@gmail.com> > Signed-off-by: Heiko Stuebner <heiko@sntech.de> > Tested-by: Ulrich Prinz <ulrich.prinz@googlemail.com> Acked-by: Rob Herring <robh@kernel.org> > --- > Documentation/devicetree/bindings/misc/sram.txt | 8 ++++++++ > 1 file changed, 8 insertions(+) > > diff --git a/Documentation/devicetree/bindings/misc/sram.txt b/Documentation/devicetree/bindings/misc/sram.txt > index 4d0a00e..09ee7a3 100644 > --- a/Documentation/devicetree/bindings/misc/sram.txt > +++ b/Documentation/devicetree/bindings/misc/sram.txt > @@ -8,9 +8,17 @@ Required properties: > > - reg : SRAM iomem address range > > +Optional properties: > + > +- mmio-sram-reserved: ordered list of reserved chunks inside the sram that > + should not be used by the operating system. > + Format is <base size>, <base size>, ...; with base being relative to the > + reg property base. > + > Example: > > sram: sram@5c000000 { > compatible = "mmio-sram"; > reg = <0x5c000000 0x40000>; /* 256 KiB SRAM at address 0x5c000000 */ > + mmio-sram-reserved = <0x0 0x100>; /* reserve 0x5c000000-0x5c000100 */ > }; > -- > 1.7.10.4 > > -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
diff --git a/Documentation/devicetree/bindings/misc/sram.txt b/Documentation/devicetree/bindings/misc/sram.txt index 4d0a00e..09ee7a3 100644 --- a/Documentation/devicetree/bindings/misc/sram.txt +++ b/Documentation/devicetree/bindings/misc/sram.txt @@ -8,9 +8,17 @@ Required properties: - reg : SRAM iomem address range +Optional properties: + +- mmio-sram-reserved: ordered list of reserved chunks inside the sram that + should not be used by the operating system. + Format is <base size>, <base size>, ...; with base being relative to the + reg property base. + Example: sram: sram@5c000000 { compatible = "mmio-sram"; reg = <0x5c000000 0x40000>; /* 256 KiB SRAM at address 0x5c000000 */ + mmio-sram-reserved = <0x0 0x100>; /* reserve 0x5c000000-0x5c000100 */ };