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Commit fd0c8280 authored by Mark A. Greer's avatar Mark A. Greer Committed by Samuel Ortiz
Browse files

NFC: trf7970a: Add 'autosuspend-delay' DTS property 



The trf7970a driver currently uses a fixed autosuspend delay of 30 seconds.
To enable users to customize the delay as they see fit, add support for the
new 'autosuspend-delay' DTS property (part of the nfc node) which can
override the default 30 seconds.

Signed-off-by: default avatarMark A. Greer <mgreer@animalcreek.com>
Signed-off-by: default avatarSamuel Ortiz <sameo@linux.intel.com>
parent 18422e68

drivers/nfc/trf7970a.c

+17 −2
Original line number Diff line number Diff line
@@ -1221,12 +1221,25 @@ static struct nfc_digital_ops trf7970a_nfc_ops = { 
	.abort_cmd		= trf7970a_abort_cmd,

};



static int trf7970a_get_autosuspend_delay(struct device_node *np)

{

	int autosuspend_delay, ret;



	ret = of_property_read_u32(np, "autosuspend-delay", &autosuspend_delay);

	if (ret)

		autosuspend_delay = TRF7970A_AUTOSUSPEND_DELAY;



	of_node_put(np);



	return autosuspend_delay;

}



static int trf7970a_probe(struct spi_device *spi)

{

	struct device_node *np = spi->dev.of_node;

	const struct spi_device_id *id = spi_get_device_id(spi);

	struct trf7970a *trf;

	int uvolts, ret;

	int uvolts, autosuspend_delay, ret;



	if (!np) {

		dev_err(&spi->dev, "No Device Tree entry\n");
@@ -1315,7 +1328,9 @@ static int trf7970a_probe(struct spi_device *spi) 
	nfc_digital_set_drvdata(trf->ddev, trf);

	spi_set_drvdata(spi, trf);



	pm_runtime_set_autosuspend_delay(trf->dev, TRF7970A_AUTOSUSPEND_DELAY);

	autosuspend_delay = trf7970a_get_autosuspend_delay(np);



	pm_runtime_set_autosuspend_delay(trf->dev, autosuspend_delay);

	pm_runtime_use_autosuspend(trf->dev);

	pm_runtime_enable(trf->dev);