From bfc3d57ff75a6ac34cc4b88a4abd6d6d9ef32e73 Mon Sep 17 00:00:00 2001 From: Mauro Carvalho Chehab Date: Sun, 26 Sep 2010 00:39:26 -0300 Subject: [PATCH] V4L/DVB: tda18271: Add some hint about what tda18217 reg ID returned Instead of doing: [ 82.581639] tda18271 4-0060: creating new instance [ 82.588411] Unknown device detected @ 4-0060, device not supported. [ 82.594695] tda18271_attach: [4-0060|M] error -22 on line 1272 [ 82.600530] tda18271 4-0060: destroying instance Print: [ 468.740392] Unknown device (0) detected @ 4-0060, device not supported. for the error message, to help detecting what's going wrong with the device. This helps to detect when the driver is using the wrong I2C bus (or have the i2g gate switch pointing to the wrong place), on devices like cx231xx that just return 0 on reads to a non-existent i2c device. Reviewed-by: Michael Krufky Signed-off-by: Mauro Carvalho Chehab --- drivers/media/common/tuners/tda18271-fe.c | 16 +++++++--------- 1 file changed, 7 insertions(+), 9 deletions(-) diff --git a/drivers/media/common/tuners/tda18271-fe.c b/drivers/media/common/tuners/tda18271-fe.c index 7955e49..9ad4454 100644 --- a/drivers/media/common/tuners/tda18271-fe.c +++ b/drivers/media/common/tuners/tda18271-fe.c @@ -1156,7 +1156,6 @@ static int tda18271_get_id(struct dvb_frontend *fe) struct tda18271_priv *priv = fe->tuner_priv; unsigned char *regs = priv->tda18271_regs; char *name; - int ret = 0; mutex_lock(&priv->lock); tda18271_read_regs(fe); @@ -1172,17 +1171,16 @@ static int tda18271_get_id(struct dvb_frontend *fe) priv->id = TDA18271HDC2; break; default: - name = "Unknown device"; - ret = -EINVAL; - break; + tda_info("Unknown device (%i) detected @ %d-%04x, device not supported.\n", + regs[R_ID], i2c_adapter_id(priv->i2c_props.adap), + priv->i2c_props.addr); + return -EINVAL; } - tda_info("%s detected @ %d-%04x%s\n", name, - i2c_adapter_id(priv->i2c_props.adap), - priv->i2c_props.addr, - (0 == ret) ? "" : ", device not supported."); + tda_info("%s detected @ %d-%04x\n", name, + i2c_adapter_id(priv->i2c_props.adap), priv->i2c_props.addr); - return ret; + return 0; } static int tda18271_setup_configuration(struct dvb_frontend *fe, -- 2.7.4