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ACPI: Introduce has_acpi_companion()

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Now that the ACPI companions of devices are represented by pointers
to struct fwnode_handle, it is not quite efficient to check whether
or not an ACPI companion of a device is present by evaluating the
ACPI_COMPANION() macro.

For this reason, introduce a special static inline routine for that,
has_acpi_companion(), and update the code to use it where applicable.

Signed-off-by: Rafael J. Wysocki <[email protected]>
This commit is contained in:
Rafael J. Wysocki 2015-03-16 23:49:08 +01:00
commit ca5b74d267
4 changed files with 15 additions and 5 deletions
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4
drivers/i2c/busses/i2c-designware-platdrv.c
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@ -166,7 +166,7 @@ static int dw_i2c_probe(struct platform_device *pdev)
/* fast mode by default because of legacy reasons */
clk_freq = 400000;
if (ACPI_COMPANION(&pdev->dev)) {
if (has_acpi_companion(&pdev->dev)) {
dw_i2c_acpi_configure(pdev);
} else if (pdev->dev.of_node) {
of_property_read_u32(pdev->dev.of_node,
@ -286,7 +286,7 @@ static int dw_i2c_remove(struct platform_device *pdev)
pm_runtime_put(&pdev->dev);
pm_runtime_disable(&pdev->dev);
if (ACPI_COMPANION(&pdev->dev))
if (has_acpi_companion(&pdev->dev))
dw_i2c_acpi_unconfigure(pdev);
return 0;