diff options
Diffstat (limited to 'drivers/iommu')
| -rw-r--r-- | drivers/iommu/exynos-iommu.c | 32 |
1 files changed, 12 insertions, 20 deletions
diff --git a/drivers/iommu/exynos-iommu.c b/drivers/iommu/exynos-iommu.c index 8c8a7f7968d1..bf6b826b1d8b 100644 --- a/drivers/iommu/exynos-iommu.c +++ b/drivers/iommu/exynos-iommu.c @@ -333,8 +333,7 @@ static irqreturn_t exynos_sysmmu_irq(int irq, void *dev_id) spin_lock(&data->lock); - if (!IS_ERR(data->clk_master)) - clk_enable(data->clk_master); + clk_enable(data->clk_master); itype = (enum exynos_sysmmu_inttype) __ffs(__raw_readl(data->sfrbase + REG_INT_STATUS)); @@ -366,8 +365,7 @@ static irqreturn_t exynos_sysmmu_irq(int irq, void *dev_id) sysmmu_unblock(data->sfrbase); - if (!IS_ERR(data->clk_master)) - clk_disable(data->clk_master); + clk_disable(data->clk_master); spin_unlock(&data->lock); @@ -376,15 +374,13 @@ static irqreturn_t exynos_sysmmu_irq(int irq, void *dev_id) static void __sysmmu_disable_nocount(struct sysmmu_drvdata *data) { - if (!IS_ERR(data->clk_master)) - clk_enable(data->clk_master); + clk_enable(data->clk_master); __raw_writel(CTRL_DISABLE, data->sfrbase + REG_MMU_CTRL); __raw_writel(0, data->sfrbase + REG_MMU_CFG); clk_disable(data->clk); - if (!IS_ERR(data->clk_master)) - clk_disable(data->clk_master); + clk_disable(data->clk_master); } static bool __sysmmu_disable(struct sysmmu_drvdata *data) @@ -437,8 +433,7 @@ static void __sysmmu_init_config(struct sysmmu_drvdata *data) static void __sysmmu_enable_nocount(struct sysmmu_drvdata *data) { - if (!IS_ERR(data->clk_master)) - clk_enable(data->clk_master); + clk_enable(data->clk_master); clk_enable(data->clk); __raw_writel(CTRL_BLOCK, data->sfrbase + REG_MMU_CTRL); @@ -449,8 +444,7 @@ static void __sysmmu_enable_nocount(struct sysmmu_drvdata *data) __raw_writel(CTRL_ENABLE, data->sfrbase + REG_MMU_CTRL); - if (!IS_ERR(data->clk_master)) - clk_disable(data->clk_master); + clk_disable(data->clk_master); } static int __sysmmu_enable(struct sysmmu_drvdata *data, phys_addr_t pgtable, @@ -493,16 +487,14 @@ static void sysmmu_tlb_invalidate_flpdcache(struct sysmmu_drvdata *data, { unsigned long flags; - if (!IS_ERR(data->clk_master)) - clk_enable(data->clk_master); + clk_enable(data->clk_master); spin_lock_irqsave(&data->lock, flags); if (is_sysmmu_active(data)) __sysmmu_tlb_invalidate_flpdcache(data, iova); spin_unlock_irqrestore(&data->lock, flags); - if (!IS_ERR(data->clk_master)) - clk_disable(data->clk_master); + clk_disable(data->clk_master); } static void sysmmu_tlb_invalidate_entry(struct sysmmu_drvdata *data, @@ -514,8 +506,7 @@ static void sysmmu_tlb_invalidate_entry(struct sysmmu_drvdata *data, if (is_sysmmu_active(data)) { unsigned int num_inv = 1; - if (!IS_ERR(data->clk_master)) - clk_enable(data->clk_master); + clk_enable(data->clk_master); /* * L2TLB invalidation required @@ -535,8 +526,7 @@ static void sysmmu_tlb_invalidate_entry(struct sysmmu_drvdata *data, data->sfrbase, iova, num_inv); sysmmu_unblock(data->sfrbase); } - if (!IS_ERR(data->clk_master)) - clk_disable(data->clk_master); + clk_disable(data->clk_master); } else { dev_dbg(data->master, "disabled. Skipping TLB invalidation @ %#x\n", iova); @@ -593,6 +583,8 @@ static int __init exynos_sysmmu_probe(struct platform_device *pdev) dev_err(dev, "Failed to prepare master's clk\n"); return ret; } + } else { + data->clk_master = NULL; } data->sysmmu = dev; |