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authorMarcin Wojtas <mw@semihalf.com>2016-03-14 09:38:56 +0100
committerDavid S. Miller <davem@davemloft.net>2016-03-14 12:19:45 -0400
commiteb43e023130b5021c1ffad4d5c84cb310ffcb0f6 (patch)
treeb56f01e32ba60c6ddeeb983d2e114c351bc602af /Documentation/devicetree/bindings/sram
parentd3bf9b19ff06bdcc4aacdd6eb395c742138a9dc9 (diff)
misc: sram: add optional ioremap without write combining
Some SRAM users may require non-bufferable access to the memory, which is impossible, because devm_ioremap_wc() is used for setting sram->virt_base. This commit adds optional flag 'no-memory-wc', which allow to choose remap method, using DT property. Documentation is updated accordingly. Signed-off-by: Marcin Wojtas <mw@semihalf.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'Documentation/devicetree/bindings/sram')
-rw-r--r--Documentation/devicetree/bindings/sram/sram.txt5
1 files changed, 5 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/sram/sram.txt b/Documentation/devicetree/bindings/sram/sram.txt
index 42ee9438b771..227e3a341af1 100644
--- a/Documentation/devicetree/bindings/sram/sram.txt
+++ b/Documentation/devicetree/bindings/sram/sram.txt
@@ -25,6 +25,11 @@ Required properties in the sram node:
- ranges : standard definition, should translate from local addresses
within the sram to bus addresses
+Optional properties in the sram node:
+
+- no-memory-wc : the flag indicating, that SRAM memory region has not to
+ be remapped as write combining. WC is used by default.
+
Required properties in the area nodes:
- reg : iomem address range, relative to the SRAM range