On Wed, Nov 16, 2016 at 03:29:33PM +0000, Lorenzo Pieralisi wrote:
> In ACPI bases systems, in order to be able to create platform
> devices and initialize them for ARM SMMU components, the IORT
> kernel implementation requires a set of static functions to be
> used by the IORT kernel layer to configure platform devices for
> ARM SMMU components.
>
> Add static configuration functions to the IORT kernel layer for
> the ARM SMMU components, so that the ARM SMMU driver can
> initialize its respective platform device by relying on the IORT
> kernel infrastructure and by adding a corresponding ACPI device
> early probe section entry.
>
> Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@xxxxxxx>
> Reviewed-by: Tomasz Nowicki <tn@xxxxxxxxxxxx>
> Tested-by: Hanjun Guo <hanjun.guo@xxxxxxxxxx>
> Tested-by: Tomasz Nowicki <tn@xxxxxxxxxxxx>
> Cc: Will Deacon <will.deacon@xxxxxxx>
> Cc: Robin Murphy <robin.murphy@xxxxxxx>
> Cc: Joerg Roedel <joro@xxxxxxxxxx>
> ---
> drivers/acpi/arm64/iort.c | 81 +++++++++++++++++++++++++++++++++++++++++++++
> drivers/iommu/arm-smmu.c | 83 ++++++++++++++++++++++++++++++++++++++++++++++-
> include/linux/acpi_iort.h | 3 ++
> 3 files changed, 166 insertions(+), 1 deletion(-)
[...]
> diff --git a/drivers/iommu/arm-smmu.c b/drivers/iommu/arm-smmu.c
> index 573b2b6..21d1892 100644
> --- a/drivers/iommu/arm-smmu.c
> +++ b/drivers/iommu/arm-smmu.c
> @@ -28,6 +28,8 @@
>
> #define pr_fmt(fmt) "arm-smmu: " fmt
>
> +#include <linux/acpi.h>
> +#include <linux/acpi_iort.h>
> #include <linux/atomic.h>
> #include <linux/delay.h>
> #include <linux/dma-iommu.h>
> @@ -1904,6 +1906,70 @@ static const struct of_device_id arm_smmu_of_match[] = {
> };
> MODULE_DEVICE_TABLE(of, arm_smmu_of_match);
>
> +#ifdef CONFIG_ACPI
> +static int acpi_smmu_get_data(u32 model, u32 *version, u32 *impl)
You should use the enum type for the version, rather than a u32.
Will
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