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i2c: designware: Remove interrupt clearing from i2c_dw_pci_probe() 

There is no need to clear interrupts in i2c_dw_pci_probe() since only place
where interrupts are unmasked is i2c_dw_xfer_init() and there interrupts
are always cleared after commit 2a2d95e9d6 ("i2c: designware: always
clear interrupts before enabling them").

This allows to cleanup the code and replace i2c_dw_clear_int() in
i2c_dw_xfer_init() by direct register read as there are no other callers.

Signed-off-by: Jarkko Nikula <jarkko.nikula@linux.intel.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
This commit is contained in:
Jarkko Nikula 2015-08-31 17:31:28 +03:00 committed by Wolfram Sang
parent 58b0497dad
commit c335631a68
3 changed files with 1 additions and 9 deletions
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8
drivers/i2c/busses/i2c-designware-core.c
View File

@ -438,7 +438,7 @@ static void i2c_dw_xfer_init(struct dw_i2c_dev *dev)
__i2c_dw_enable(dev, true);
/* Clear and enable interrupts */
i2c_dw_clear_int(dev);
dw_readl(dev, DW_IC_CLR_INTR);
dw_writel(dev, DW_IC_INTR_DEFAULT_MASK, DW_IC_INTR_MASK);
}
@ -839,12 +839,6 @@ void i2c_dw_disable(struct dw_i2c_dev *dev)
}
EXPORT_SYMBOL_GPL(i2c_dw_disable);
void i2c_dw_clear_int(struct dw_i2c_dev *dev)
{
dw_readl(dev, DW_IC_CLR_INTR);
}
EXPORT_SYMBOL_GPL(i2c_dw_clear_int);
void i2c_dw_disable_int(struct dw_i2c_dev *dev)
{
dw_writel(dev, 0, DW_IC_INTR_MASK);

1
drivers/i2c/busses/i2c-designware-core.h
View File

@ -122,7 +122,6 @@ extern irqreturn_t i2c_dw_isr(int this_irq, void *dev_id);
extern void i2c_dw_enable(struct dw_i2c_dev *dev);
extern u32 i2c_dw_is_enabled(struct dw_i2c_dev *dev);
extern void i2c_dw_disable(struct dw_i2c_dev *dev);
extern void i2c_dw_clear_int(struct dw_i2c_dev *dev);
extern void i2c_dw_disable_int(struct dw_i2c_dev *dev);
extern u32 i2c_dw_read_comp_param(struct dw_i2c_dev *dev);

1
drivers/i2c/busses/i2c-designware-pcidrv.c
View File

@ -268,7 +268,6 @@ static int i2c_dw_pci_probe(struct pci_dev *pdev,
}
i2c_dw_disable_int(dev);
i2c_dw_clear_int(dev);
r = i2c_add_numbered_adapter(adap);
if (r) {
dev_err(&pdev->dev, "failure adding adapter\n");