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| author | Tomasz Figa <t.figa@samsung.com> | 2015-01-08 07:52:38 +0100 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2015-01-16 14:35:35 +0000 |
| commit | cf0681ca4cc5c9faa85a2df4c063b926fc09c977 (patch) | |
| tree | 1671b2131639786941e2fbdcac2479204db29565 /Documentation | |
| parent | 0c4c2edcaeee323fcc4f41a862456358eda50b57 (diff) | |
| download | linux-cf0681ca4cc5c9faa85a2df4c063b926fc09c977.tar.gz linux-cf0681ca4cc5c9faa85a2df4c063b926fc09c977.tar.bz2 linux-cf0681ca4cc5c9faa85a2df4c063b926fc09c977.zip | |
ARM: 8262/1: l2c: Add support for overriding prefetch settings
Firmware on certain boards (e.g. ODROID-U3) can leave incorrect L2C prefetch
settings configured in registers leading to crashes if L2C is enabled
without overriding them. This patch introduces bindings to enable
prefetch settings to be specified from DT and necessary support in the
driver.
[mszyprow: rebased onto v3.18-rc1, added error message when prefetch related
dt property has been provided without any value]
Signed-off-by: Tomasz Figa <t.figa@samsung.com>
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Tested-by: Nishanth Menon <nm@ti.com>
Acked-by: Nishanth Menon <nm@ti.com>
Acked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/devicetree/bindings/arm/l2cc.txt | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/arm/l2cc.txt b/Documentation/devicetree/bindings/arm/l2cc.txt index 292ef7ca3058..0dbabe9a6b0a 100644 --- a/Documentation/devicetree/bindings/arm/l2cc.txt +++ b/Documentation/devicetree/bindings/arm/l2cc.txt @@ -57,6 +57,16 @@ Optional properties: - cache-id-part: cache id part number to be used if it is not present on hardware - wt-override: If present then L2 is forced to Write through mode +- arm,double-linefill : Override double linefill enable setting. Enable if + non-zero, disable if zero. +- arm,double-linefill-incr : Override double linefill on INCR read. Enable + if non-zero, disable if zero. +- arm,double-linefill-wrap : Override double linefill on WRAP read. Enable + if non-zero, disable if zero. +- arm,prefetch-drop : Override prefetch drop enable setting. Enable if non-zero, + disable if zero. +- arm,prefetch-offset : Override prefetch offset value. Valid values are + 0-7, 15, 23, and 31. Example: |