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i2c: designware: Use accessors to DW_IC_INTR_MASK register
Convert access to DW_IC_INTR_MASK register using the existing __i2c_dw_write_intr_mask() and a __i2c_dw_read_intr_mask() introduced here. Motivation to this is to prepare for generic polling mode code where polling mode will use a SW mask instead of DW_IC_INTR_MASK. Signed-off-by: Jarkko Nikula <jarkko.nikula@linux.intel.com> Tested-by: Jiawen Wu <jiawenwu@trustnetic.com> Signed-off-by: Andi Shyti <andi.shyti@kernel.org>
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parent
64b6426a6e
commit
04c71da4a9
3 changed files with 20 additions and 11 deletions
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@ -648,7 +648,7 @@ void i2c_dw_disable(struct dw_i2c_dev *dev)
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__i2c_dw_disable(dev);
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/* Disable all interrupts */
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regmap_write(dev->map, DW_IC_INTR_MASK, 0);
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__i2c_dw_write_intr_mask(dev, 0);
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regmap_read(dev->map, DW_IC_CLR_INTR, &dummy);
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i2c_dw_release_lock(dev);
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@ -360,6 +360,13 @@ static inline void __i2c_dw_write_intr_mask(struct dw_i2c_dev *dev,
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regmap_write(dev->map, DW_IC_INTR_MASK, val);
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}
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static inline void __i2c_dw_read_intr_mask(struct dw_i2c_dev *dev,
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unsigned int *intr_mask)
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{
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if (!(dev->flags & ACCESS_POLLING))
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regmap_read(dev->map, DW_IC_INTR_MASK, intr_mask);
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}
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void __i2c_dw_disable(struct dw_i2c_dev *dev);
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extern void i2c_dw_configure_master(struct dw_i2c_dev *dev);
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@ -240,7 +240,7 @@ static void i2c_dw_xfer_init(struct dw_i2c_dev *dev)
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msgs[dev->msg_write_idx].addr | ic_tar);
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/* Enforce disabled interrupts (due to HW issues) */
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regmap_write(dev->map, DW_IC_INTR_MASK, 0);
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__i2c_dw_write_intr_mask(dev, 0);
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/* Enable the adapter */
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__i2c_dw_enable(dev);
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@ -544,7 +544,7 @@ i2c_dw_xfer_msg(struct dw_i2c_dev *dev)
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if (dev->msg_err)
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intr_mask = 0;
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regmap_write(dev->map, DW_IC_INTR_MASK, intr_mask);
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__i2c_dw_write_intr_mask(dev, intr_mask);
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}
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static u8
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@ -552,6 +552,7 @@ i2c_dw_recv_len(struct dw_i2c_dev *dev, u8 len)
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{
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struct i2c_msg *msgs = dev->msgs;
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u32 flags = msgs[dev->msg_read_idx].flags;
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unsigned int intr_mask;
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/*
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* Adjust the buffer length and mask the flag
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@ -566,8 +567,9 @@ i2c_dw_recv_len(struct dw_i2c_dev *dev, u8 len)
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* Received buffer length, re-enable TX_EMPTY interrupt
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* to resume the SMBUS transaction.
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*/
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regmap_update_bits(dev->map, DW_IC_INTR_MASK, DW_IC_INTR_TX_EMPTY,
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DW_IC_INTR_TX_EMPTY);
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__i2c_dw_read_intr_mask(dev, &intr_mask);
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intr_mask |= DW_IC_INTR_TX_EMPTY;
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__i2c_dw_write_intr_mask(dev, intr_mask);
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return len;
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}
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@ -827,7 +829,7 @@ static irqreturn_t i2c_dw_isr(int this_irq, void *dev_id)
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* interrupt really came from this HW (E.g. firmware has left
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* the HW active).
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*/
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regmap_write(dev->map, DW_IC_INTR_MASK, 0);
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__i2c_dw_write_intr_mask(dev, 0);
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return IRQ_HANDLED;
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}
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@ -840,7 +842,7 @@ static irqreturn_t i2c_dw_isr(int this_irq, void *dev_id)
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* Anytime TX_ABRT is set, the contents of the tx/rx
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* buffers are flushed. Make sure to skip them.
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*/
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regmap_write(dev->map, DW_IC_INTR_MASK, 0);
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__i2c_dw_write_intr_mask(dev, 0);
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goto tx_aborted;
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}
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@ -862,9 +864,9 @@ static irqreturn_t i2c_dw_isr(int this_irq, void *dev_id)
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complete(&dev->cmd_complete);
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else if (unlikely(dev->flags & ACCESS_INTR_MASK)) {
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/* Workaround to trigger pending interrupt */
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regmap_read(dev->map, DW_IC_INTR_MASK, &stat);
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regmap_write(dev->map, DW_IC_INTR_MASK, 0);
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regmap_write(dev->map, DW_IC_INTR_MASK, stat);
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__i2c_dw_read_intr_mask(dev, &stat);
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__i2c_dw_write_intr_mask(dev, 0);
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__i2c_dw_write_intr_mask(dev, stat);
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}
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return IRQ_HANDLED;
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@ -1016,7 +1018,7 @@ int i2c_dw_probe_master(struct dw_i2c_dev *dev)
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if (ret)
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return ret;
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regmap_write(dev->map, DW_IC_INTR_MASK, 0);
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__i2c_dw_write_intr_mask(dev, 0);
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i2c_dw_release_lock(dev);
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if (!(dev->flags & ACCESS_POLLING)) {
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