diff options
| author | Yong Wu <yong.wu@mediatek.com> | 2021-01-11 19:18:57 +0800 |
|---|---|---|
| committer | Will Deacon <will@kernel.org> | 2021-02-01 11:31:17 +0000 |
| commit | 7f37a91dc85e37ed06422c6e460724375a86f40c (patch) | |
| tree | 011d5ea8f81b3315d86ff8490887ead0802768cc /drivers | |
| parent | 9bdfe4c175c8a9ea4959f7ad087e3d66d3917bc8 (diff) | |
| download | linux-7f37a91dc85e37ed06422c6e460724375a86f40c.tar.bz2 | |
iommu/mediatek: Move hw_init into attach_device
In attach device, it will update the pagetable base address register.
Move the hw_init function also here. Then it only need call
pm_runtime_get/put one time here if m4u has power domain.
Signed-off-by: Yong Wu <yong.wu@mediatek.com>
Reviewed-by: Tomasz Figa <tfiga@chromium.org>
Link: https://lore.kernel.org/r/20210111111914.22211-17-yong.wu@mediatek.com
Signed-off-by: Will Deacon <will@kernel.org>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/iommu/mtk_iommu.c | 13 |
1 files changed, 7 insertions, 6 deletions
diff --git a/drivers/iommu/mtk_iommu.c b/drivers/iommu/mtk_iommu.c index 1c4af574f5f7..87c4626c9072 100644 --- a/drivers/iommu/mtk_iommu.c +++ b/drivers/iommu/mtk_iommu.c @@ -126,6 +126,8 @@ struct mtk_iommu_domain { static const struct iommu_ops mtk_iommu_ops; +static int mtk_iommu_hw_init(const struct mtk_iommu_data *data); + /* * In M4U 4GB mode, the physical address is remapped as below: * @@ -364,12 +366,15 @@ static int mtk_iommu_attach_device(struct iommu_domain *domain, { struct mtk_iommu_data *data = dev_iommu_priv_get(dev); struct mtk_iommu_domain *dom = to_mtk_domain(domain); + int ret; if (!data) return -ENODEV; - /* Update the pgtable base address register of the M4U HW */ - if (!data->m4u_dom) { + if (!data->m4u_dom) { /* Initialize the M4U HW */ + ret = mtk_iommu_hw_init(data); + if (ret) + return ret; data->m4u_dom = dom; writel(dom->cfg.arm_v7s_cfg.ttbr & MMU_PT_ADDR_MASK, data->base + REG_MMU_PT_BASE_ADDR); @@ -724,10 +729,6 @@ static int mtk_iommu_probe(struct platform_device *pdev) platform_set_drvdata(pdev, data); - ret = mtk_iommu_hw_init(data); - if (ret) - return ret; - ret = iommu_device_sysfs_add(&data->iommu, dev, NULL, "mtk-iommu.%pa", &ioaddr); if (ret) |