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iommu/rockchip: add sclk

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On some platform, it needs aclk/hclk/sclk for using iommu.

Change-Id: Iaf60124e225d418af8bbf1e0b4a31e907358fcfd
Signed-off-by: Hu Kejun <william.hu@rock-chips.com>
This commit is contained in:
Hu Kejun
2018-10-09 20:05:14 +08:00
committed by Tao Huang
parent ebfecc19e2
commit ea8f1b0e82
1 changed files with 16 additions and 0 deletions
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16
drivers/iommu/rockchip-iommu.c
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@@ -103,6 +103,7 @@ struct rk_iommu {
struct iommu_domain *domain; /* domain to which iommu is attached */
struct clk *aclk; /* aclock belong to master */
struct clk *hclk; /* hclock belong to master */
struct clk *sclk; /* sclock belong to master */
struct list_head dev_node;
};
@@ -274,6 +275,9 @@ static void rk_iommu_power_on(struct rk_iommu *iommu)
clk_enable(iommu->hclk);
}
if (iommu->sclk)
clk_enable(iommu->sclk);
pm_runtime_get_sync(iommu->dev);
}
@@ -285,6 +289,9 @@ static void rk_iommu_power_off(struct rk_iommu *iommu)
clk_disable(iommu->aclk);
clk_disable(iommu->hclk);
}
if (iommu->sclk)
clk_disable(iommu->sclk);
}
static u32 rk_iova_dte_index(dma_addr_t iova)
@@ -1345,11 +1352,20 @@ static int rk_iommu_probe(struct platform_device *pdev)
iommu->hclk = NULL;
}
iommu->sclk = devm_clk_get(dev, "sclk");
if (IS_ERR(iommu->sclk)) {
dev_info(dev, "can't get sclk\n");
iommu->sclk = NULL;
}
if (iommu->aclk && iommu->hclk) {
clk_prepare(iommu->aclk);
clk_prepare(iommu->hclk);
}
if (iommu->sclk)
clk_prepare(iommu->sclk);
pm_runtime_enable(iommu->dev);
pm_runtime_get_sync(iommu->dev);
list_add(&iommu->dev_node, &iommu_dev_list);