Hi. Thank you for your work for exynos-iommu. Actually I am preparing a design change of exynos-iommu driver including DT support. If you are OK, I want to discuss with you about it.
The current exynos-iommu driver needs to be upgraded to make it transparent to the client drivers. Thank you. Cho KyongHo. On Mon, Nov 5, 2012 at 6:48 PM, Rahul Sharma <[email protected]> wrote: > This patch adds supports DT based intantiation of sysmmu devices. > It also removes dependency on CONFIG_EXYNOS_DEV_SYSMMU which is > primarily meant for nont-dt platforms. > > This patch is based on "arm/exynos" branch at > http://git.kernel.org/?p=linux/kernel/git/joro/iommu.git > > This patch is having dependency on linux-samsung-soc patchset named > "add dt based support for iommu for hdmi" > > Signed-off-by: Rahul Sharma <[email protected]> > --- > drivers/iommu/Kconfig | 2 +- > drivers/iommu/exynos-iommu.c | 28 +++++++++++++++++++++++++--- > 2 files changed, 26 insertions(+), 4 deletions(-) > > diff --git a/drivers/iommu/Kconfig b/drivers/iommu/Kconfig > index 9f69b56..52dc41f 100644 > --- a/drivers/iommu/Kconfig > +++ b/drivers/iommu/Kconfig > @@ -168,7 +168,7 @@ 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 > help > Support for the IOMMU(System MMU) of Samsung Exynos application > diff --git a/drivers/iommu/exynos-iommu.c b/drivers/iommu/exynos-iommu.c > index 7fe44f8..9079f71 100644 > --- a/drivers/iommu/exynos-iommu.c > +++ b/drivers/iommu/exynos-iommu.c > @@ -25,6 +25,7 @@ > #include <linux/list.h> > #include <linux/memblock.h> > #include <linux/export.h> > +#include <linux/of_platform.h> > > #include <asm/cacheflush.h> > #include <asm/pgtable.h> > @@ -576,6 +577,7 @@ static int exynos_sysmmu_probe(struct platform_device *pdev) > int i, ret; > struct device *dev; > struct sysmmu_drvdata *data; > + struct sysmmu_platform_data *platdata; > > dev = &pdev->dev; > > @@ -634,9 +636,21 @@ static int exynos_sysmmu_probe(struct platform_device *pdev) > } > } > > + if(dev->of_node) { > + platdata = devm_kzalloc(dev, sizeof(*platdata), GFP_KERNEL); > + if (!platdata) { > + dev_dbg(dev, "memory allocation for pdata failed\n"); > + goto err_irq; > + } > + > + platdata->clockname = SYSMMU_CLOCK_NAME; > + platdata->dbgname = (char *)dev->of_node->name; > + dev->platform_data = platdata; > + } > + > if (dev_get_platdata(dev)) { > char *deli, *beg; > - struct sysmmu_platform_data *platdata = dev_get_platdata(dev); > + platdata = dev_get_platdata(dev); > > beg = platdata->clockname; > > @@ -670,8 +684,7 @@ static int exynos_sysmmu_probe(struct platform_device *pdev) > > __set_fault_handler(data, &default_fault_handler); > > - if (dev->parent) > - pm_runtime_enable(dev); > + pm_runtime_enable(dev); > > dev_dbg(dev, "(%s) Initialized\n", data->dbgname); > return 0; > @@ -693,11 +706,20 @@ err_alloc: > return ret; > } > > +static struct of_device_id iommu_match_types[] = { > + { > + .compatible = "samsung,exynos5-sysmmu", > + }, { > + /* end node */ > + } > +}; > + > static struct platform_driver exynos_sysmmu_driver = { > .probe = exynos_sysmmu_probe, > .driver = { > .owner = THIS_MODULE, > .name = "exynos-sysmmu", > + .of_match_table = iommu_match_types, > } > }; > > -- > 1.7.0.4 > > _______________________________________________ > iommu mailing list > [email protected] > https://lists.linuxfoundation.org/mailman/listinfo/iommu
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