On Mon, Oct 29, 2018 at 08:25:32PM +1300, Chris Packham wrote:
> The aurora cache on the Marvell Armada-XP SoC supports ECC protection
> for the L2 data arrays. Add a "marvell,ecc-enable" device tree property
> which can be used to enable this.
>
> Signed-off-by: Chris Packham <chris.pack...@alliedtelesis.co.nz>
> [j...@pengutronix.de: use aurora specific define AURORA_ACR_ECC_EN]
> Signed-off-by: Jan Luebbe <j...@pengutronix.de>
> ---
> Documentation/devicetree/bindings/arm/l2c2x0.txt | 2 ++
> arch/arm/mm/cache-l2x0.c | 7 +++++++
> 2 files changed, 9 insertions(+)
>
> diff --git a/Documentation/devicetree/bindings/arm/l2c2x0.txt
> b/Documentation/devicetree/bindings/arm/l2c2x0.txt
> index fbe6cb21f4cf..15a84f0ba9f1 100644
> --- a/Documentation/devicetree/bindings/arm/l2c2x0.txt
> +++ b/Documentation/devicetree/bindings/arm/l2c2x0.txt
> @@ -76,6 +76,8 @@ Optional properties:
> specified to indicate that such transforms are precluded.
> - arm,parity-enable : enable parity checking on the L2 cache (L220 or PL310).
> - arm,parity-disable : disable parity checking on the L2 cache (L220 or
> PL310).
> +- marvell,ecc-enable : enable ECC protection on the L2 cache
> +- marvell,ecc-disable : disable ECC protection on the L2 cache
> - arm,outer-sync-disable : disable the outer sync operation on the L2 cache.
> Some core tiles, especially ARM PB11MPCore have a faulty L220 cache that
> will randomly hang unless outer sync operations are disabled.
> diff --git a/arch/arm/mm/cache-l2x0.c b/arch/arm/mm/cache-l2x0.c
> index b70bee74750d..644f786e4fa9 100644
> --- a/arch/arm/mm/cache-l2x0.c
> +++ b/arch/arm/mm/cache-l2x0.c
> @@ -1505,6 +1505,13 @@ static void __init aurora_of_parse(const struct
> device_node *np,
> mask |= AURORA_ACR_FORCE_WRITE_POLICY_MASK;
> }
>
> + if (of_property_read_bool(np, "marvell,ecc-enable")) {
> + mask |= AURORA_ACR_ECC_EN;
> + val |= AURORA_ACR_ECC_EN;
> + } else if (of_property_read_bool(np, "marvell,ecc-disable")) {
> + mask |= AURORA_ACR_ECC_EN;
> + }
> +
> if (of_property_read_bool(np, "arm,parity-enable")) {
> mask |= AURORA_ACR_PARITY_EN;
> val |= AURORA_ACR_PARITY_EN;
> --
checkpatch complains here:
WARNING: DT binding docs and includes should be a separate patch. See:
Documentation/devicetree/bindings/submitting-patches.txt
--
Regards/Gruss,
Boris.
Good mailing practices for 400: avoid top-posting and trim the reply.
