From: Patrice Chotard <[email protected]> Configures all GPIOs as output, in order to minimize power consumption when GPIOs are unused.
Signed-off-by: Amelie DELAUNAY <[email protected]> Signed-off-by: Patrice Chotard <[email protected]> --- drivers/gpio/gpio-stmpe.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/drivers/gpio/gpio-stmpe.c b/drivers/gpio/gpio-stmpe.c index 45e5b92..80c6ae6 100644 --- a/drivers/gpio/gpio-stmpe.c +++ b/drivers/gpio/gpio-stmpe.c @@ -410,7 +410,7 @@ static int stmpe_gpio_probe(struct platform_device *pdev) struct stmpe *stmpe = dev_get_drvdata(pdev->dev.parent); struct device_node *np = pdev->dev.of_node; struct stmpe_gpio *stmpe_gpio; - int ret; + int ret, i; int irq = 0; irq = platform_get_irq(pdev, 0); @@ -475,6 +475,10 @@ static int stmpe_gpio_probe(struct platform_device *pdev) NULL); } + /* To minimize power consumption, configure unused GPIOs as outputs */ + for (i = 0; i < stmpe_gpio->chip.ngpio; i++) + stmpe_gpio_direction_output(&stmpe_gpio->chip, i, 0); + platform_set_drvdata(pdev, stmpe_gpio); return 0; -- 1.9.1
