From: Peter Meerwald <pmeerw@pmeerw.net>
To: linux-iio@vger.kernel.org
Cc: Peter Meerwald <pmeerw@pmeerw.net>
Subject: [PATCH v2 15/15] staging:iio:hmc5843: Check initialization and chip identifier
Date: Thu, 19 Sep 2013 21:36:00 +0200 [thread overview]
Message-ID: <1379619360-8150-16-git-send-email-pmeerw@pmeerw.net> (raw)
In-Reply-To: <1379619360-8150-1-git-send-email-pmeerw@pmeerw.net>
Signed-off-by: Peter Meerwald <pmeerw@pmeerw.net>
---
drivers/staging/iio/magnetometer/hmc5843.c | 33 ++++++++++++++++++++++++------
1 file changed, 27 insertions(+), 6 deletions(-)
diff --git a/drivers/staging/iio/magnetometer/hmc5843.c b/drivers/staging/iio/magnetometer/hmc5843.c
index 9f4571f..4b4b2e2 100644
--- a/drivers/staging/iio/magnetometer/hmc5843.c
+++ b/drivers/staging/iio/magnetometer/hmc5843.c
@@ -33,6 +33,7 @@
#define HMC5843_MODE_REG 0x02
#define HMC5843_DATA_OUT_MSB_REGS 0x03
#define HMC5843_STATUS_REG 0x09
+#define HMC5843_ID_REG 0x0a
enum hmc5843_ids {
HMC5843_ID,
@@ -545,12 +546,30 @@ static const struct hmc5843_chip_info hmc5843_chip_info_tbl[] = {
},
};
-static void hmc5843_init(struct hmc5843_data *data)
+static int hmc5843_init(struct hmc5843_data *data)
{
- hmc5843_set_meas_conf(data, HMC5843_MEAS_CONF_NORMAL);
- hmc5843_set_samp_freq(data, HMC5843_RATE_DEFAULT);
- hmc5843_set_range_gain(data, HMC5843_RANGE_GAIN_DEFAULT);
- hmc5843_set_mode(data, HMC5843_MODE_CONVERSION_CONTINUOUS);
+ int ret;
+ u8 id[3];
+
+ ret = i2c_smbus_read_i2c_block_data(data->client, HMC5843_ID_REG,
+ sizeof(id), id);
+ if (ret < 0)
+ return ret;
+ if (id[0] != 'H' || id[1] != '4' || id[2] != '3') {
+ dev_err(&data->client->dev, "no HMC5843/5883/5883L sensor\n");
+ return -ENODEV;
+ }
+
+ ret = hmc5843_set_meas_conf(data, HMC5843_MEAS_CONF_NORMAL);
+ if (ret < 0)
+ return ret;
+ ret = hmc5843_set_samp_freq(data, HMC5843_RATE_DEFAULT);
+ if (ret < 0)
+ return ret;
+ ret = hmc5843_set_range_gain(data, HMC5843_RANGE_GAIN_DEFAULT);
+ if (ret < 0)
+ return ret;
+ return hmc5843_set_mode(data, HMC5843_MODE_CONVERSION_CONTINUOUS);
}
static const struct iio_info hmc5843_info = {
@@ -588,7 +607,9 @@ static int hmc5843_probe(struct i2c_client *client,
indio_dev->num_channels = 4;
indio_dev->available_scan_masks = hmc5843_scan_masks;
- hmc5843_init(data);
+ ret = hmc5843_init(data);
+ if (ret < 0)
+ return ret;
ret = iio_triggered_buffer_setup(indio_dev, NULL,
hmc5843_trigger_handler, NULL);
--
1.8.4
next prev parent reply other threads:[~2013-09-19 19:36 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-09-19 19:35 [PATCH v2 00/15] staging:iio:hmc5843 cleanup Peter Meerwald
2013-09-19 19:35 ` [PATCH v2 01/15] staging:iio:hmc5843: Add pointer to i2c client to data struct Peter Meerwald
2013-09-21 10:46 ` Jonathan Cameron
2013-10-01 9:40 ` Jonathan Cameron
2013-10-01 8:44 ` Peter Meerwald
2013-10-01 10:10 ` Jonathan Cameron
2013-09-19 19:35 ` [PATCH v2 02/15] staging:iio:hmc5843: Rewrite init function Peter Meerwald
2013-10-01 9:41 ` Jonathan Cameron
2013-09-19 19:35 ` [PATCH v2 03/15] staging:iio:hmc5843: Use INFO_SAMP_FREQ Peter Meerwald
2013-10-01 9:44 ` Jonathan Cameron
2013-09-19 19:35 ` [PATCH v2 04/15] staging:iio:hmc5843: Remove unused LSB register #defines Peter Meerwald
2013-10-01 9:55 ` Jonathan Cameron
2013-09-19 19:35 ` [PATCH v2 05/15] staging:iio:hmc5843: Tighten comments Peter Meerwald
2013-09-19 19:35 ` [PATCH v2 06/15] staging:iio:hmc5843: Introduce helper functions to show/check list of int pairs Peter Meerwald
2013-10-01 9:55 ` Jonathan Cameron
2013-10-01 9:58 ` Jonathan Cameron
2013-09-19 19:35 ` [PATCH v2 07/15] staging:iio:hmc5843: Use CALIBSCALE instead of magn_range Peter Meerwald
2013-09-20 19:57 ` Jonathan Cameron
2013-09-20 20:12 ` Peter Meerwald
2013-09-20 21:54 ` Jonathan Cameron
2013-09-19 19:35 ` [PATCH v2 08/15] staging:iio:hmc5843: Always read all channels values otherwise no updates Peter Meerwald
2013-09-19 19:35 ` [PATCH v2 09/15] staging:iio:hmc5843: Add trigger handling Peter Meerwald
2013-09-19 19:35 ` [PATCH v2 10/15] staging:iio:hmc5843: Remove ability to change operating mode Peter Meerwald
2013-09-19 19:35 ` [PATCH v2 11/15] staging:iio:hmc5843: Rename _configure() to _set_mode() Peter Meerwald
2013-09-19 19:35 ` [PATCH v2 12/15] staging:iio:hmc5843: Reorganize _set_meas_conf() Peter Meerwald
2013-09-19 19:35 ` [PATCH v2 13/15] staging:iio:hmc5843: Rename _set_rate() to _set_samp_freq() Peter Meerwald
2013-09-19 19:35 ` [PATCH v2 14/15] staging:iio:hmc5843: Introduce _set_range_gain() Peter Meerwald
2013-09-19 19:36 ` Peter Meerwald [this message]
2013-09-20 20:05 ` [PATCH v2 00/15] staging:iio:hmc5843 cleanup Jonathan Cameron
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