This reduces device IDLE power consumption 180mA (260mA => 80mA).
I would like to see solution where tda18271 driver puts chips on
sleep by default and leaves it powered according to driver config
option. Michael declined it, as it could cause regression, and
asked to sleep explicitly after attach.
Cc: Michael Krufky <mkru...@linuxtv.org>
Signed-off-by: Antti Palosaari <cr...@iki.fi>
---
drivers/media/usb/em28xx/em28xx-dvb.c | 10 ++++++++++
1 file changed, 10 insertions(+)
diff --git a/drivers/media/usb/em28xx/em28xx-dvb.c
b/drivers/media/usb/em28xx/em28xx-dvb.c
index be242ac..c97ffc6 100644
--- a/drivers/media/usb/em28xx/em28xx-dvb.c
+++ b/drivers/media/usb/em28xx/em28xx-dvb.c
@@ -1002,6 +1002,16 @@ static int em28xx_dvb_init(struct em28xx *dev)
goto out_free;
}
+ /*
+ * We should put tda18271 explicitly sleep in order to
+ * reduce IDLE power consumption 180mA
+ */
+ result = dvb->fe[0]->ops.tuner_ops.sleep(dvb->fe[0]);
+ if (result) {
+ dvb_frontend_detach(dvb->fe[0]);
+ goto out_free;
+ }
+
#ifdef CONFIG_GPIOLIB
/* enable LNA for DVB-T, DVB-T2 and DVB-C */
result = gpio_request_one(dvb->gpio,
--
1.7.11.4
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