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Commit ea8f3c2c authored by Mauro Carvalho Chehab's avatar Mauro Carvalho Chehab
Browse files

[media] drx-j: Allow userspace control of LNA 



Instead of just disabling the LNA every time, allow to control it from
userspace.

Acked-by: default avatarDevin Heitmueller <dheitmueller@kernellabs.com>
Signed-off-by: default avatarMauro Carvalho Chehab <m.chehab@samsung.com>
parent 244c0e06

drivers/media/dvb-frontends/drx39xyj/drxj.c

+41 −0
Original line number Diff line number Diff line
@@ -20683,6 +20683,46 @@ static int drx39xxj_init(struct dvb_frontend *fe) 
	return 0;

}













static int drx39xxj_set_lna(struct dvb_frontend *fe)













{













	int result;













	struct dtv_frontend_properties *c = &fe->dtv_property_cache;













	struct drx39xxj_state *state = fe->demodulator_priv;













	struct drx_demod_instance *demod = state->demod;













	struct drxj_data *ext_attr = demod->my_ext_attr;













	struct drxuio_cfg uio_cfg;













	struct drxuio_data uio_data;

























	if (c->lna) {













		if (!ext_attr->has_lna) {













			pr_err("LNA is not supported on this device!\n");













			return -EINVAL;

























		}













	}

























	/* Turn off the LNA */













	uio_cfg.uio = DRX_UIO1;













	uio_cfg.mode = DRX_UIO_MODE_READWRITE;













	/* Configure user-I/O #3: enable read/write */













	result = ctrl_set_uio_cfg(demod, &uio_cfg);













	if (result) {













		pr_err("Failed to setup LNA GPIO!\n");













		return result;













	}

























	uio_data.uio = DRX_UIO1;













	uio_data.value = c->lna;













	result = ctrl_uio_write(demod, &uio_data);













	if (result != 0) {













		pr_err("Failed to %sable LNA!\n",













		       c->lna ? "en" : "dis");













		return result;













	}

























	return 0;













}



























static int drx39xxj_get_tune_settings(struct dvb_frontend *fe,















				      struct dvb_frontend_tune_settings *tune)















{










@@ -20824,6 +20864,7 @@ static struct dvb_frontend_ops drx39xxj_ops = {













	.read_snr = drx39xxj_read_snr,















	.read_ucblocks = drx39xxj_read_ucblocks,















	.release = drx39xxj_release,













	.set_lna = drx39xxj_set_lna,















};





























MODULE_DESCRIPTION("Micronas DRX39xxj Frontend");