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iommu/exynos: Simplify master clock operations 

All clock API function can be called on NULL clock, so simplify code avoid
checking of master clock presence.

Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
This commit is contained in:
Marek Szyprowski 2016-02-18 15:12:51 +01:00 committed by Joerg Roedel
parent 5e3435eb7e
commit b398af2169
1 changed files with 12 additions and 20 deletions
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32
drivers/iommu/exynos-iommu.c
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@ -333,8 +333,7 @@ static irqreturn_t exynos_sysmmu_irq(int irq, void *dev_id)
spin_lock(&data->lock); 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) itype = (enum exynos_sysmmu_inttype)
__ffs(__raw_readl(data->sfrbase + REG_INT_STATUS)); __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); sysmmu_unblock(data->sfrbase);
if (!IS_ERR(data->clk_master)) clk_disable(data->clk_master);
clk_disable(data->clk_master);
spin_unlock(&data->lock); 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) 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(CTRL_DISABLE, data->sfrbase + REG_MMU_CTRL);
__raw_writel(0, data->sfrbase + REG_MMU_CFG); __raw_writel(0, data->sfrbase + REG_MMU_CFG);
clk_disable(data->clk); 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) 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) 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); clk_enable(data->clk);
__raw_writel(CTRL_BLOCK, data->sfrbase + REG_MMU_CTRL); __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); __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, 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; 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); spin_lock_irqsave(&data->lock, flags);
if (is_sysmmu_active(data)) if (is_sysmmu_active(data))
__sysmmu_tlb_invalidate_flpdcache(data, iova); __sysmmu_tlb_invalidate_flpdcache(data, iova);
spin_unlock_irqrestore(&data->lock, flags); 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, 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)) { if (is_sysmmu_active(data)) {
unsigned int num_inv = 1; unsigned int num_inv = 1;
if (!IS_ERR(data->clk_master)) clk_enable(data->clk_master);
clk_enable(data->clk_master);
/* /*
* L2TLB invalidation required * L2TLB invalidation required
@ -535,8 +526,7 @@ static void sysmmu_tlb_invalidate_entry(struct sysmmu_drvdata *data,
data->sfrbase, iova, num_inv); data->sfrbase, iova, num_inv);
sysmmu_unblock(data->sfrbase); sysmmu_unblock(data->sfrbase);
} }
if (!IS_ERR(data->clk_master)) clk_disable(data->clk_master);
clk_disable(data->clk_master);
} else { } else {
dev_dbg(data->master, dev_dbg(data->master,
"disabled. Skipping TLB invalidation @ %#x\n", iova); "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"); dev_err(dev, "Failed to prepare master's clk\n");
return ret; return ret;
} }
} else {
data->clk_master = NULL;
} }
data->sysmmu = dev; data->sysmmu = dev;