Hi KyongHo,
On 14 March 2014 10:39, Cho KyongHo <pullip.cho@xxxxxxxxxxx> wrote:
> This commit adds device tree support for System MMU.
>
> Signed-off-by: Cho KyongHo <pullip.cho@xxxxxxxxxxx>
> ---
> drivers/iommu/Kconfig | 5 ++---
> drivers/iommu/exynos-iommu.c | 21 +++++++++++++++++----
> 2 files changed, 19 insertions(+), 7 deletions(-)
>
> diff --git a/drivers/iommu/Kconfig b/drivers/iommu/Kconfig
> index df56e4c..22af807 100644
> --- a/drivers/iommu/Kconfig
> +++ b/drivers/iommu/Kconfig
> @@ -178,16 +178,15 @@ config TEGRA_IOMMU_SMMU
>
> config EXYNOS_IOMMU
> bool "Exynos IOMMU Support"
> - depends on ARCH_EXYNOS && EXYNOS_DEV_SYSMMU
> + depends on ARCH_EXYNOS
> select IOMMU_API
> + default n
This is not needed as it is the default choice.
> help
> Support for the IOMMU(System MMU) of Samsung Exynos application
> processor family. This enables H/W multimedia accellerators to see
> non-linear physical memory chunks as a linear memory in their
> address spaces
>
> - If unsure, say N here.
> -
> config EXYNOS_IOMMU_DEBUG
> bool "Debugging log for Exynos IOMMU"
> depends on EXYNOS_IOMMU
> diff --git a/drivers/iommu/exynos-iommu.c b/drivers/iommu/exynos-iommu.c
> index 33b424d..34feb04 100644
> --- a/drivers/iommu/exynos-iommu.c
> +++ b/drivers/iommu/exynos-iommu.c
> @@ -26,6 +26,7 @@
> #include <linux/list.h>
> #include <linux/memblock.h>
> #include <linux/export.h>
> +#include <linux/of.h>
>
> #include <asm/cacheflush.h>
> #include <asm/pgtable.h>
> @@ -497,7 +498,7 @@ void exynos_sysmmu_tlb_invalidate(struct device *dev)
> read_unlock_irqrestore(&data->lock, flags);
> }
>
> -static int exynos_sysmmu_probe(struct platform_device *pdev)
> +static int __init exynos_sysmmu_probe(struct platform_device *pdev)
> {
> int irq, ret;
> struct device *dev = &pdev->dev;
> @@ -557,11 +558,23 @@ static int exynos_sysmmu_probe(struct platform_device *pdev)
> return 0;
> }
>
> -static struct platform_driver exynos_sysmmu_driver = {
> - .probe = exynos_sysmmu_probe,
> - .driver = {
> +#ifdef CONFIG_OF
This is not needed as Exynos is DT only platform.
> +static struct of_device_id sysmmu_of_match[] __initconst = {
> + { .compatible = "samsung,sysmmu-v1", },
> + { .compatible = "samsung,sysmmu-v2", },
> + { .compatible = "samsung,sysmmu-v3.1", },
> + { .compatible = "samsung,sysmmu-v3.2", },
> + { .compatible = "samsung,sysmmu-v3.3", },
> + { },
> +};
> +#endif
> +
> +static struct platform_driver exynos_sysmmu_driver __refdata = {
> + .probe = exynos_sysmmu_probe,
> + .driver = {
> .owner = THIS_MODULE,
> .name = "exynos-sysmmu",
> + .of_match_table = of_match_ptr(sysmmu_of_match),
of_match_ptr is not needed for the same reason as above.
--
With warm regards,
Sachin
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