From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from saturn.retrosnub.co.uk ([178.18.118.26]:39878 "EHLO saturn.retrosnub.co.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751019AbdHTK2i (ORCPT ); Sun, 20 Aug 2017 06:28:38 -0400 Date: Sun, 20 Aug 2017 11:28:29 +0100 From: Jonathan Cameron To: =?UTF-8?B?TWljaGHFgiBNaXJvc8WCYXc=?= Cc: Linus Walleij , Hartmut Knaack , Lars-Peter Clausen , Peter Meerwald-Stadler , linux-iio@vger.kernel.org Subject: Re: [PATCH 4/4] iio: magnetometer: ak8974: debug AMI306 calibration data Message-ID: <20170820112829.011bf027@archlinux> In-Reply-To: <20170820112552.7c287701@archlinux> References: <20170820112552.7c287701@archlinux> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Sender: linux-iio-owner@vger.kernel.org List-Id: linux-iio@vger.kernel.org On Sun, 20 Aug 2017 11:25:52 +0100 Jonathan Cameron wrote: > On Thu, 17 Aug 2017 15:56:12 +0200 > Michał Mirosław wrote: > > > Use AMI306 calibration data for randomness and debugging. > > > > Signed-off-by: Michał Mirosław > Applied to the togreg branch of iio.git and pushed out as testing for the > autobuilders to play with it. > > Thanks, > > Jonathan > > --- > > drivers/iio/magnetometer/ak8974.c | 41 +++++++++++++++++++++++++++++++++++++++ > > 1 file changed, 41 insertions(+) > > > > diff --git a/drivers/iio/magnetometer/ak8974.c b/drivers/iio/magnetometer/ak8974.c > > index d8c45206ba00..b3221b34606b 100644 > > --- a/drivers/iio/magnetometer/ak8974.c > > +++ b/drivers/iio/magnetometer/ak8974.c > > @@ -445,6 +445,20 @@ static int ak8974_selftest(struct ak8974 *ak8974) > > return 0; > > } > > > > +static void ak8974_read_calib_data(struct ak8974 *ak8974, unsigned int reg, > > + __le16 *tab, size_t tab_size) > > +{ > > + int ret = regmap_bulk_read(ak8974->map, reg, tab, tab_size); > > + if (ret) { > > + memset(tab, 0xFF, tab_size); > > + dev_warn(&ak8974->i2c->dev, > > + "can't read calibration data (regs %u..%u): %d\n", > > + reg, reg + tab_size - 1, ret); Slight tweak made to avoid the warning: drivers/iio/magnetometer/ak8974.c: In function ‘ak8974_read_calib_data’: drivers/iio/magnetometer/ak8974.c:455:45: warning: format ‘%u’ expects argument of type ‘unsigned int’, but argument 4 has type ‘size_t {aka long unsigned int}’ [-Wformat=] "can't read calibration data (regs %u..%u): %d\n", ~^ %lu reg, reg + tab_size - 1, ret); ~~~~~~~~~~~~~~~~~~ Did the obvious ;) Jonathan > > + } else { > > + add_device_randomness(tab, tab_size); > > + } > > +} > > + > > static int ak8974_detect(struct ak8974 *ak8974) > > { > > unsigned int whoami; > > @@ -490,6 +504,33 @@ static int ak8974_detect(struct ak8974 *ak8974) > > ak8974->name = name; > > ak8974->variant = whoami; > > > > + if (whoami == AK8974_WHOAMI_VALUE_AMI306) { > > + __le16 fab_data1[9], fab_data2[3]; > > + int i; > > + > > + ak8974_read_calib_data(ak8974, AMI306_FINEOUTPUT_X, > > + fab_data1, sizeof(fab_data1)); > > + ak8974_read_calib_data(ak8974, AMI306_OFFZERO_X, > > + fab_data2, sizeof(fab_data2)); > > + > > + for (i = 0; i < 3; ++i) { > > + static const char axis[3] = "XYZ"; > > + static const char pgaxis[6] = "ZYZXYX"; > > + unsigned offz = le16_to_cpu(fab_data2[i]) & 0x7F; > > + unsigned fine = le16_to_cpu(fab_data1[i]); > > + unsigned sens = le16_to_cpu(fab_data1[i + 3]); > > + unsigned pgain1 = le16_to_cpu(fab_data1[i + 6]); > > + unsigned pgain2 = pgain1 >> 8; > > + > > + pgain1 &= 0xFF; > > + > > + dev_info(&ak8974->i2c->dev, > > + "factory calibration for axis %c: offz=%u sens=%u fine=%u pga%c=%u pga%c=%u\n", > > + axis[i], offz, sens, fine, pgaxis[i * 2], > > + pgain1, pgaxis[i * 2 + 1], pgain2); > > + } > > + } > > + > > return 0; > > } > > > > -- > To unsubscribe from this list: send the line "unsubscribe linux-iio" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html