From: Mircea Caprioru <mircea.caprioru@analog.com>
To: <jic23@kernel.org>
Cc: <Michael.Hennerich@analog.com>, <alexandru.ardelean@analog.com>,
<lars@metafoo.de>, <gregkh@linuxfoundation.org>,
<linux-kernel@vger.kernel.org>, <linux-iio@vger.kernel.org>,
Mircea <mircea.caprioru@analog.com>
Subject: [RESEND PATCH] iio: adc: ad7124: Add direct reg access
Date: Wed, 29 Jan 2020 07:14:35 +0200 [thread overview]
Message-ID: <20200129051435.15366-1-mircea.caprioru@analog.com> (raw)
From: Mircea <mircea.caprioru@analog.com>
This patch adds the posibility do read and write registers from userspace
using the kernel debug direct register access option.
Signed-off-by: Mircea Caprioru <mircea.caprioru@analog.com>
---
drivers/iio/adc/ad7124.c | 28 ++++++++++++++++++++++++++++
1 file changed, 28 insertions(+)
diff --git a/drivers/iio/adc/ad7124.c b/drivers/iio/adc/ad7124.c
index 52f45b13da4a..38e67e08a79a 100644
--- a/drivers/iio/adc/ad7124.c
+++ b/drivers/iio/adc/ad7124.c
@@ -93,6 +93,14 @@ static const unsigned int ad7124_gain[8] = {
1, 2, 4, 8, 16, 32, 64, 128
};
+static const unsigned int ad7124_reg_size[] = {
+ 1, 2, 3, 3, 2, 1, 3, 3, 1, 2, 2, 2, 2,
+ 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
+ 2, 2, 2, 2, 2, 2, 2, 3, 3, 3, 3, 3, 3,
+ 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
+ 3, 3, 3, 3, 3
+};
+
static const int ad7124_master_clk_freq_hz[3] = {
[AD7124_LOW_POWER] = 76800,
[AD7124_MID_POWER] = 153600,
@@ -360,6 +368,25 @@ static int ad7124_write_raw(struct iio_dev *indio_dev,
}
}
+static int ad7124_reg_access(struct iio_dev *indio_dev,
+ unsigned int reg,
+ unsigned int writeval,
+ unsigned int *readval)
+{
+ struct ad7124_state *st = iio_priv(indio_dev);
+ int ret;
+
+
+ if (readval)
+ ret = ad_sd_read_reg(&st->sd, reg, ad7124_reg_size[reg],
+ readval);
+ else
+ ret = ad_sd_write_reg(&st->sd, reg, ad7124_reg_size[reg],
+ writeval);
+
+ return ret;
+}
+
static IIO_CONST_ATTR(in_voltage_scale_available,
"0.000001164 0.000002328 0.000004656 0.000009313 0.000018626 0.000037252 0.000074505 0.000149011 0.000298023");
@@ -375,6 +402,7 @@ static const struct attribute_group ad7124_attrs_group = {
static const struct iio_info ad7124_info = {
.read_raw = ad7124_read_raw,
.write_raw = ad7124_write_raw,
+ .debugfs_reg_access = &ad7124_reg_access,
.validate_trigger = ad_sd_validate_trigger,
.attrs = &ad7124_attrs_group,
};
--
2.17.1
next reply other threads:[~2020-01-29 5:14 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-01-29 5:14 Mircea Caprioru [this message]
2020-01-29 5:51 ` [RESEND PATCH] iio: adc: ad7124: Add direct reg access Greg KH
2020-01-29 7:18 ` Lars-Peter Clausen
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