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ASoC: fsi: Add spin lock operation for accessing shared area
fsi_master_xxx function should be protected by spin lock, because it are used from both FSI-A and FSI-B. Signed-off-by: Kuninori Morimoto <morimoto.kuninori@renesas.com> Acked-by: Liam Girdwood <lrg@slimlogic.co.uk> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
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0d34e91596
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1 changed files with 26 additions and 3 deletions
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@ -110,6 +110,7 @@ struct fsi_master {
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struct fsi_priv fsia;
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struct fsi_priv fsib;
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struct sh_fsi_platform_info *info;
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spinlock_t lock;
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};
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/************************************************************************
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@ -168,30 +169,51 @@ static int fsi_reg_mask_set(struct fsi_priv *fsi, u32 reg, u32 mask, u32 data)
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static int fsi_master_write(struct fsi_master *master, u32 reg, u32 data)
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{
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int ret;
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unsigned long flags;
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if ((reg < MREG_START) ||
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(reg > MREG_END))
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return -1;
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return __fsi_reg_write((u32)(master->base + reg), data);
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spin_lock_irqsave(&master->lock, flags);
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ret = __fsi_reg_write((u32)(master->base + reg), data);
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spin_unlock_irqrestore(&master->lock, flags);
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return ret;
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}
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static u32 fsi_master_read(struct fsi_master *master, u32 reg)
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{
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u32 ret;
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unsigned long flags;
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if ((reg < MREG_START) ||
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(reg > MREG_END))
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return 0;
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return __fsi_reg_read((u32)(master->base + reg));
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spin_lock_irqsave(&master->lock, flags);
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ret = __fsi_reg_read((u32)(master->base + reg));
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spin_unlock_irqrestore(&master->lock, flags);
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return ret;
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}
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static int fsi_master_mask_set(struct fsi_master *master,
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u32 reg, u32 mask, u32 data)
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{
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int ret;
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unsigned long flags;
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if ((reg < MREG_START) ||
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(reg > MREG_END))
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return -1;
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return __fsi_reg_mask_set((u32)(master->base + reg), mask, data);
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spin_lock_irqsave(&master->lock, flags);
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ret = __fsi_reg_mask_set((u32)(master->base + reg), mask, data);
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spin_unlock_irqrestore(&master->lock, flags);
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return ret;
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}
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/************************************************************************
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@ -929,6 +951,7 @@ static int fsi_probe(struct platform_device *pdev)
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master->fsia.master = master;
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master->fsib.base = master->base + 0x40;
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master->fsib.master = master;
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spin_lock_init(&master->lock);
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pm_runtime_enable(&pdev->dev);
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pm_runtime_resume(&pdev->dev);
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