mfd: ti_am335x_tscadc: Avoid possible deadlock of reg_lock
Since the addition of continuous sampling mode and shared irq support, the reg_lock lock can be taken with and without interrupts. This patch uses the *_irq* variant which should be used in order to avaoid a deadlock. Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Signed-off-by: Lee Jones <lee.jones@linaro.org>
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@ -56,21 +56,25 @@ EXPORT_SYMBOL_GPL(am335x_tsc_se_update);
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void am335x_tsc_se_set(struct ti_tscadc_dev *tsadc, u32 val)
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{
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spin_lock(&tsadc->reg_lock);
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unsigned long flags;
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spin_lock_irqsave(&tsadc->reg_lock, flags);
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tsadc->reg_se_cache = tscadc_readl(tsadc, REG_SE);
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tsadc->reg_se_cache |= val;
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am335x_tsc_se_update(tsadc);
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spin_unlock(&tsadc->reg_lock);
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spin_unlock_irqrestore(&tsadc->reg_lock, flags);
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}
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EXPORT_SYMBOL_GPL(am335x_tsc_se_set);
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void am335x_tsc_se_clr(struct ti_tscadc_dev *tsadc, u32 val)
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{
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spin_lock(&tsadc->reg_lock);
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unsigned long flags;
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spin_lock_irqsave(&tsadc->reg_lock, flags);
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tsadc->reg_se_cache = tscadc_readl(tsadc, REG_SE);
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tsadc->reg_se_cache &= ~val;
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am335x_tsc_se_update(tsadc);
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spin_unlock(&tsadc->reg_lock);
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spin_unlock_irqrestore(&tsadc->reg_lock, flags);
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}
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EXPORT_SYMBOL_GPL(am335x_tsc_se_clr);
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