diff options
| author | Mark A. Greer <mgreer@animalcreek.com> | 2014-03-25 08:54:40 -0700 |
|---|---|---|
| committer | Samuel Ortiz <sameo@linux.intel.com> | 2014-04-22 00:37:28 +0200 |
| commit | fd0c8280cf47104e87dc10828ded541b4e84deda (patch) | |
| tree | 8a27b77b32be6504a12dc610c611976ecf0af2dc /drivers/nfc | |
| parent | 18422e686ef043b9abe004326ac9ffa1e38b81ec (diff) | |
| download | linux-fd0c8280cf47104e87dc10828ded541b4e84deda.tar.gz linux-fd0c8280cf47104e87dc10828ded541b4e84deda.tar.xz | |
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: Mark A. Greer <mgreer@animalcreek.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
Diffstat (limited to 'drivers/nfc')
| -rw-r--r-- | drivers/nfc/trf7970a.c | 19 |
1 files changed, 17 insertions, 2 deletions
diff --git a/drivers/nfc/trf7970a.c b/drivers/nfc/trf7970a.c index 8744a556fbd1..a91859b133e8 100644 --- a/drivers/nfc/trf7970a.c +++ b/drivers/nfc/trf7970a.c @@ -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); |