diff options
| -rw-r--r-- | Documentation/devicetree/bindings/arm/l2cc.txt | 5 | ||||
| -rw-r--r-- | arch/arm/mm/cache-l2x0.c | 20 |
2 files changed, 25 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/arm/l2cc.txt b/Documentation/devicetree/bindings/arm/l2cc.txt index 0dbabe9a6b0a..2251dccb141e 100644 --- a/Documentation/devicetree/bindings/arm/l2cc.txt +++ b/Documentation/devicetree/bindings/arm/l2cc.txt @@ -67,6 +67,11 @@ Optional properties: disable if zero. - arm,prefetch-offset : Override prefetch offset value. Valid values are 0-7, 15, 23, and 31. +- prefetch-data : Data prefetch. Value: <0> (forcibly disable), <1> + (forcibly enable), property absent (retain settings set by firmware) +- prefetch-instr : Instruction prefetch. Value: <0> (forcibly disable), + <1> (forcibly enable), property absent (retain settings set by + firmware) Example: diff --git a/arch/arm/mm/cache-l2x0.c b/arch/arm/mm/cache-l2x0.c index 90599f60ff02..71b3d3309024 100644 --- a/arch/arm/mm/cache-l2x0.c +++ b/arch/arm/mm/cache-l2x0.c @@ -1221,6 +1221,26 @@ static void __init l2c310_of_parse(const struct device_node *np, pr_err("L2C-310 OF arm,prefetch-offset property value is missing\n"); } + ret = of_property_read_u32(np, "prefetch-data", &val); + if (ret == 0) { + if (val) + prefetch |= L310_PREFETCH_CTRL_DATA_PREFETCH; + else + prefetch &= ~L310_PREFETCH_CTRL_DATA_PREFETCH; + } else if (ret != -EINVAL) { + pr_err("L2C-310 OF prefetch-data property value is missing\n"); + } + + ret = of_property_read_u32(np, "prefetch-instr", &val); + if (ret == 0) { + if (val) + prefetch |= L310_PREFETCH_CTRL_INSTR_PREFETCH; + else + prefetch &= ~L310_PREFETCH_CTRL_INSTR_PREFETCH; + } else if (ret != -EINVAL) { + pr_err("L2C-310 OF prefetch-instr property value is missing\n"); + } + l2x0_saved_regs.prefetch_ctrl = prefetch; } |