[PATCH v2 0/6] iio:pressure:ms5637: add ms5803 support

[PATCH v2 0/6] iio:pressure:ms5637: add ms5803 support

[Alexandre Belloni]

Hello,

This series adds support for the Measurement Specialities ms5803. It is
very similar to the ms5805 but has a different PROM layout (which I
suspect predates the ms5805 PROM layout). Also it supports less
frequency sampling options.

After a bit of preparatory work in the ms5637 driver and its common
library, mainly to handle the PROM layout and sample frequencies, adding
support is trivial.

Changes in v2:
 - Dropped "iio:pressure:ms5637: switch to probe_new" to keep the i2c_device_id
   table.
 - Reorder trivial-devices.yaml

Alexandre Belloni (6):
  dt-bindings: trivial-devices: reorder memsic devices
  iio:pressure:ms5637: introduce hardware differentiation
  iio:pressure:ms5637: limit available sample frequencies
  iio:common:ms_sensors:ms_sensors_i2c: rework CRC calculation helper
  iio:common:ms_sensors:ms_sensors_i2c: add support for alternative PROM
    layout
  iio:pressure:ms5637: add ms5803 support

 .../devicetree/bindings/trivial-devices.yaml  | 10 ++-
 .../iio/common/ms_sensors/ms_sensors_i2c.c    | 76 ++++++++++++++----
 .../iio/common/ms_sensors/ms_sensors_i2c.h    | 15 +++-
 drivers/iio/pressure/ms5637.c                 | 77 +++++++++++++++----
 4 files changed, 143 insertions(+), 35 deletions(-)

-- 
2.29.2

[PATCH v2 1/6] dt-bindings: trivial-devices: reorder memsic devices

[Alexandre Belloni]

Reorder memsic compatible strings alphabetically

Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
---
 Documentation/devicetree/bindings/trivial-devices.yaml | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/Documentation/devicetree/bindings/trivial-devices.yaml b/Documentation/devicetree/bindings/trivial-devices.yaml
index bdc2dc318178..e9b64be4b91e 100644
--- a/Documentation/devicetree/bindings/trivial-devices.yaml
+++ b/Documentation/devicetree/bindings/trivial-devices.yaml
@@ -148,10 +148,6 @@ properties:
           - maxim,max31730
             # mCube 3-axis 8-bit digital accelerometer
           - mcube,mc3230
-            # MEMSIC magnetometer
-          - memsic,mmc35240
-            # MEMSIC 2-axis 8-bit digital accelerometer
-          - memsic,mxc6225
             # Measurement Specialities I2C temperature and humidity sensor
           - meas,htu21
             # Measurement Specialities I2C pressure and temperature sensor
@@ -166,6 +162,10 @@ properties:
           - meas,ms8607-temppressure
             # Measurement Specialties temperature sensor
           - meas,tsys01
+            # MEMSIC magnetometer
+          - memsic,mmc35240
+            # MEMSIC 2-axis 8-bit digital accelerometer
+          - memsic,mxc6225
             # Microchip differential I2C ADC, 1 Channel, 18 bit
           - microchip,mcp3421
             # Microchip differential I2C ADC, 2 Channel, 18 bit
-- 
2.29.2

[PATCH v2 2/6] iio:pressure:ms5637: introduce hardware differentiation

[Alexandre Belloni]

Some sensors in the ms58xx family have a different PROM length and a
different number of available resolution. introduce struct ms_tp_hw_data to
handle those differences.

Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
---
Changes in v2:
 - handle the i2c_device_table

 .../iio/common/ms_sensors/ms_sensors_i2c.h    | 11 ++++
 drivers/iio/pressure/ms5637.c                 | 50 +++++++++++++++----
 2 files changed, 51 insertions(+), 10 deletions(-)

diff --git a/drivers/iio/common/ms_sensors/ms_sensors_i2c.h b/drivers/iio/common/ms_sensors/ms_sensors_i2c.h
index bad09c80e47a..f4a88148c113 100644
--- a/drivers/iio/common/ms_sensors/ms_sensors_i2c.h
+++ b/drivers/iio/common/ms_sensors/ms_sensors_i2c.h
@@ -25,6 +25,16 @@ struct ms_ht_dev {
 	u8 res_index;
 };
 
+/**
+ * struct ms_hw_data - Temperature/Pressure sensor hardware data
+ * @prom_len:		number of words in the PROM
+ * @max_res_index:	maximum sensor resolution index
+ */
+struct ms_tp_hw_data {
+	u8 prom_len;
+	u8 max_res_index;
+};
+
 /**
  * struct ms_tp_dev - Temperature/Pressure sensor device structure
  * @client:	i2c client
@@ -36,6 +46,7 @@ struct ms_ht_dev {
 struct ms_tp_dev {
 	struct i2c_client *client;
 	struct mutex lock;
+	const struct ms_tp_hw_data *hw;
 	u16 prom[MS_SENSORS_TP_PROM_WORDS_NB + 1];
 	u8 res_index;
 };
diff --git a/drivers/iio/pressure/ms5637.c b/drivers/iio/pressure/ms5637.c
index 5b59a4137d32..fdd557ac71a3 100644
--- a/drivers/iio/pressure/ms5637.c
+++ b/drivers/iio/pressure/ms5637.c
@@ -30,6 +30,11 @@
 
 #include "../common/ms_sensors/ms_sensors_i2c.h"
 
+struct ms_tp_data {
+	const char *name;
+	const struct ms_tp_hw_data *hw;
+};
+
 static const int ms5637_samp_freq[6] = { 960, 480, 240, 120, 60, 30 };
 /* String copy of the above const for readability purpose */
 static const char ms5637_show_samp_freq[] = "960 480 240 120 60 30";
@@ -129,6 +134,7 @@ static const struct iio_info ms5637_info = {
 static int ms5637_probe(struct i2c_client *client,
 			const struct i2c_device_id *id)
 {
+	const struct ms_tp_data *data;
 	struct ms_tp_dev *dev_data;
 	struct iio_dev *indio_dev;
 	int ret;
@@ -142,17 +148,25 @@ static int ms5637_probe(struct i2c_client *client,
 		return -EOPNOTSUPP;
 	}
 
+	if (id)
+		data = (const struct ms_tp_data *)id->driver_data;
+	else
+		data = device_get_match_data(&client->dev);
+	if (!data)
+		return -EINVAL;
+
 	indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*dev_data));
 	if (!indio_dev)
 		return -ENOMEM;
 
 	dev_data = iio_priv(indio_dev);
 	dev_data->client = client;
-	dev_data->res_index = 5;
+	dev_data->res_index = data->hw->max_res_index;
+	dev_data->hw = data->hw;
 	mutex_init(&dev_data->lock);
 
 	indio_dev->info = &ms5637_info;
-	indio_dev->name = id->name;
+	indio_dev->name = data->name;
 	indio_dev->modes = INDIO_DIRECT_MODE;
 	indio_dev->channels = ms5637_channels;
 	indio_dev->num_channels = ARRAY_SIZE(ms5637_channels);
@@ -170,20 +184,36 @@ static int ms5637_probe(struct i2c_client *client,
 	return devm_iio_device_register(&client->dev, indio_dev);
 }
 
+static const struct ms_tp_hw_data ms5637_hw_data  = {
+	.prom_len = 7,
+	.max_res_index = 5
+};
+
+static const struct ms_tp_data ms5637_data = { .name = "ms5637", .hw = &ms5637_hw_data };
+
+static const struct ms_tp_data ms5805_data = { .name = "ms5805", .hw = &ms5637_hw_data };
+
+static const struct ms_tp_data ms5837_data = { .name = "ms5837", .hw = &ms5637_hw_data };
+
+static const struct ms_tp_data ms8607_data = {
+	.name = "ms8607-temppressure",
+	.hw = &ms5637_hw_data,
+};
+
 static const struct i2c_device_id ms5637_id[] = {
-	{"ms5637", 0},
-	{"ms5805", 0},
-	{"ms5837", 0},
-	{"ms8607-temppressure", 0},
+	{"ms5637", (kernel_ulong_t)&ms5637_data },
+	{"ms5805", (kernel_ulong_t)&ms5805_data },
+	{"ms5837", (kernel_ulong_t)&ms5837_data },
+	{"ms8607-temppressure", (kernel_ulong_t)&ms8607_data },
 	{}
 };
 MODULE_DEVICE_TABLE(i2c, ms5637_id);
 
 static const struct of_device_id ms5637_of_match[] = {
-	{ .compatible = "meas,ms5637", },
-	{ .compatible = "meas,ms5805", },
-	{ .compatible = "meas,ms5837", },
-	{ .compatible = "meas,ms8607-temppressure", },
+	{ .compatible = "meas,ms5637", .data = &ms5637_data },
+	{ .compatible = "meas,ms5805", .data = &ms5805_data },
+	{ .compatible = "meas,ms5837", .data = &ms5837_data },
+	{ .compatible = "meas,ms8607-temppressure", .data = &ms8607_data },
 	{ },
 };
 MODULE_DEVICE_TABLE(of, ms5637_of_match);
-- 
2.29.2

[PATCH v2 3/6] iio:pressure:ms5637: limit available sample frequencies

[Alexandre Belloni]

Avoid exposing all the sampling frequencies for chip that only support a
subset.

Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
---
Changes in v2:
 -use sysfs_emit_at

 drivers/iio/pressure/ms5637.c | 19 +++++++++++++++----
 1 file changed, 15 insertions(+), 4 deletions(-)

diff --git a/drivers/iio/pressure/ms5637.c b/drivers/iio/pressure/ms5637.c
index fdd557ac71a3..0a6034342714 100644
--- a/drivers/iio/pressure/ms5637.c
+++ b/drivers/iio/pressure/ms5637.c
@@ -36,8 +36,19 @@ struct ms_tp_data {
 };
 
 static const int ms5637_samp_freq[6] = { 960, 480, 240, 120, 60, 30 };
-/* String copy of the above const for readability purpose */
-static const char ms5637_show_samp_freq[] = "960 480 240 120 60 30";
+
+static ssize_t ms5637_show_samp_freq(struct device *dev, struct device_attribute *attr, char *buf)
+{
+	struct iio_dev *indio_dev = dev_to_iio_dev(dev);
+	struct ms_tp_dev *dev_data = iio_priv(indio_dev);
+	int i, len = 0;
+
+	for (i = 0; i <= dev_data->hw->max_res_index; i++)
+		len += sysfs_emit_at(buf, len, "%u ", ms5637_samp_freq[i]);
+	sysfs_emit_at(buf, len - 1, "\n");
+
+	return len;
+}
 
 static int ms5637_read_raw(struct iio_dev *indio_dev,
 			   struct iio_chan_spec const *channel, int *val,
@@ -114,10 +125,10 @@ static const struct iio_chan_spec ms5637_channels[] = {
 	}
 };
 
-static IIO_CONST_ATTR_SAMP_FREQ_AVAIL(ms5637_show_samp_freq);
+static IIO_DEV_ATTR_SAMP_FREQ_AVAIL(ms5637_show_samp_freq);
 
 static struct attribute *ms5637_attributes[] = {
-	&iio_const_attr_sampling_frequency_available.dev_attr.attr,
+	&iio_dev_attr_sampling_frequency_available.dev_attr.attr,
 	NULL,
 };
 
-- 
2.29.2

[PATCH v2 4/6] iio:common:ms_sensors:ms_sensors_i2c: rework CRC calculation helper

[Alexandre Belloni]

The CRC calculation always happens on 8 words which is why there is an
extra element in the prom array of struct ms_tp_dev. However, on ms5637 and
similar, only 7 words are readable.

Then, set MS_SENSORS_TP_PROM_WORDS_NB to 8 and stop passing a len parameter
to ms_sensors_tp_crc_valid as this simply hide the fact that it is
hardcoded.

Finally, use the newly introduced hw->prom_len to know how many words can be
read.

Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
---
 drivers/iio/common/ms_sensors/ms_sensors_i2c.c | 12 +++++-------
 drivers/iio/common/ms_sensors/ms_sensors_i2c.h |  4 ++--
 2 files changed, 7 insertions(+), 9 deletions(-)

diff --git a/drivers/iio/common/ms_sensors/ms_sensors_i2c.c b/drivers/iio/common/ms_sensors/ms_sensors_i2c.c
index b9e2038d05ef..872f90459e2e 100644
--- a/drivers/iio/common/ms_sensors/ms_sensors_i2c.c
+++ b/drivers/iio/common/ms_sensors/ms_sensors_i2c.c
@@ -493,19 +493,18 @@ EXPORT_SYMBOL(ms_sensors_ht_read_humidity);
  *     This function is only used when reading PROM coefficients
  *
  * @prom:	pointer to PROM coefficients array
- * @len:	length of PROM coefficients array
  *
  * Return: True if CRC is ok.
  */
-static bool ms_sensors_tp_crc_valid(u16 *prom, u8 len)
+static bool ms_sensors_tp_crc_valid(u16 *prom)
 {
 	unsigned int cnt, n_bit;
 	u16 n_rem = 0x0000, crc_read = prom[0], crc = (*prom & 0xF000) >> 12;
 
-	prom[len - 1] = 0;
+	prom[MS_SENSORS_TP_PROM_WORDS_NB - 1] = 0;
 	prom[0] &= 0x0FFF;      /* Clear the CRC computation part */
 
-	for (cnt = 0; cnt < len * 2; cnt++) {
+	for (cnt = 0; cnt < MS_SENSORS_TP_PROM_WORDS_NB * 2; cnt++) {
 		if (cnt % 2 == 1)
 			n_rem ^= prom[cnt >> 1] & 0x00FF;
 		else
@@ -537,7 +536,7 @@ int ms_sensors_tp_read_prom(struct ms_tp_dev *dev_data)
 {
 	int i, ret;
 
-	for (i = 0; i < MS_SENSORS_TP_PROM_WORDS_NB; i++) {
+	for (i = 0; i < dev_data->hw->prom_len; i++) {
 		ret = ms_sensors_read_prom_word(
 			dev_data->client,
 			MS_SENSORS_TP_PROM_READ + (i << 1),
@@ -547,8 +546,7 @@ int ms_sensors_tp_read_prom(struct ms_tp_dev *dev_data)
 			return ret;
 	}
 
-	if (!ms_sensors_tp_crc_valid(dev_data->prom,
-				     MS_SENSORS_TP_PROM_WORDS_NB + 1)) {
+	if (!ms_sensors_tp_crc_valid(dev_data->prom)) {
 		dev_err(&dev_data->client->dev,
 			"Calibration coefficients crc check error\n");
 		return -ENODEV;
diff --git a/drivers/iio/common/ms_sensors/ms_sensors_i2c.h b/drivers/iio/common/ms_sensors/ms_sensors_i2c.h
index f4a88148c113..f15b973f27c6 100644
--- a/drivers/iio/common/ms_sensors/ms_sensors_i2c.h
+++ b/drivers/iio/common/ms_sensors/ms_sensors_i2c.h
@@ -11,7 +11,7 @@
 #include <linux/i2c.h>
 #include <linux/mutex.h>
 
-#define MS_SENSORS_TP_PROM_WORDS_NB		7
+#define MS_SENSORS_TP_PROM_WORDS_NB		8
 
 /**
  * struct ms_ht_dev - Humidity/Temperature sensor device structure
@@ -47,7 +47,7 @@ struct ms_tp_dev {
 	struct i2c_client *client;
 	struct mutex lock;
 	const struct ms_tp_hw_data *hw;
-	u16 prom[MS_SENSORS_TP_PROM_WORDS_NB + 1];
+	u16 prom[MS_SENSORS_TP_PROM_WORDS_NB];
 	u8 res_index;
 };
 
-- 
2.29.2

[PATCH v2 5/6] iio:common:ms_sensors:ms_sensors_i2c: add support for alternative PROM layout

[Alexandre Belloni]

Currently, only the 112bit PROM with 7 words is supported. However the ms58xx
family also have devices with a 128bit PROM on 8 words. See AN520:
C-CODE EXAMPLE FOR MS56XX, MS57XX (EXCEPT ANALOG SENSOR), AND MS58XX SERIES
PRESSURE SENSORS and the various device datasheets.

The difference is that the CRC is the 4 LSBs of word7 instead of being the
4 MSBs of word0.

Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
---
Changes in v2:
 - Fix return value documentation for ms_sensors_tp_crc_valid_112 and
   ms_sensors_tp_crc_valid_128

 .../iio/common/ms_sensors/ms_sensors_i2c.c    | 70 ++++++++++++++++---
 1 file changed, 59 insertions(+), 11 deletions(-)

diff --git a/drivers/iio/common/ms_sensors/ms_sensors_i2c.c b/drivers/iio/common/ms_sensors/ms_sensors_i2c.c
index 872f90459e2e..16ea697e945c 100644
--- a/drivers/iio/common/ms_sensors/ms_sensors_i2c.c
+++ b/drivers/iio/common/ms_sensors/ms_sensors_i2c.c
@@ -488,21 +488,18 @@ int ms_sensors_ht_read_humidity(struct ms_ht_dev *dev_data,
 EXPORT_SYMBOL(ms_sensors_ht_read_humidity);
 
 /**
- * ms_sensors_tp_crc_valid() - CRC check function for
+ * ms_sensors_tp_crc4() - Calculate PROM CRC for
  *     Temperature and pressure devices.
  *     This function is only used when reading PROM coefficients
  *
  * @prom:	pointer to PROM coefficients array
  *
- * Return: True if CRC is ok.
+ * Return: CRC.
  */
-static bool ms_sensors_tp_crc_valid(u16 *prom)
+static u8 ms_sensors_tp_crc4(u16 *prom)
 {
 	unsigned int cnt, n_bit;
-	u16 n_rem = 0x0000, crc_read = prom[0], crc = (*prom & 0xF000) >> 12;
-
-	prom[MS_SENSORS_TP_PROM_WORDS_NB - 1] = 0;
-	prom[0] &= 0x0FFF;      /* Clear the CRC computation part */
+	u16 n_rem = 0x0000;
 
 	for (cnt = 0; cnt < MS_SENSORS_TP_PROM_WORDS_NB * 2; cnt++) {
 		if (cnt % 2 == 1)
@@ -517,10 +514,55 @@ static bool ms_sensors_tp_crc_valid(u16 *prom)
 				n_rem <<= 1;
 		}
 	}
-	n_rem >>= 12;
-	prom[0] = crc_read;
 
-	return n_rem == crc;
+	return n_rem >> 12;
+}
+
+/**
+ * ms_sensors_tp_crc_valid_112() - CRC check function for
+ *     Temperature and pressure devices for 112bit PROM.
+ *     This function is only used when reading PROM coefficients
+ *
+ * @prom:	pointer to PROM coefficients array
+ *
+ * Return: True if CRC is ok.
+ */
+static bool ms_sensors_tp_crc_valid_112(u16 *prom)
+{
+	u16 w0 = prom[0], crc_read = (w0 & 0xF000) >> 12;
+	u8 crc;
+
+	prom[0] &= 0x0FFF;      /* Clear the CRC computation part */
+	prom[MS_SENSORS_TP_PROM_WORDS_NB - 1] = 0;
+
+	crc = ms_sensors_tp_crc4(prom);
+
+	prom[0] = w0;
+
+	return crc == crc_read;
+}
+
+/**
+ * ms_sensors_tp_crc_valid_128() - CRC check function for
+ *     Temperature and pressure devices for 128bit PROM.
+ *     This function is only used when reading PROM coefficients
+ *
+ * @prom:	pointer to PROM coefficients array
+ *
+ * Return: True if CRC is ok.
+ */
+static bool ms_sensors_tp_crc_valid_128(u16 *prom)
+{
+	u16 w7 = prom[7], crc_read = w7 & 0x000F;
+	u8 crc;
+
+	prom[7] &= 0xFF00;      /* Clear the CRC and LSB part */
+
+	crc = ms_sensors_tp_crc4(prom);
+
+	prom[7] = w7;
+
+	return crc == crc_read;
 }
 
 /**
@@ -535,6 +577,7 @@ static bool ms_sensors_tp_crc_valid(u16 *prom)
 int ms_sensors_tp_read_prom(struct ms_tp_dev *dev_data)
 {
 	int i, ret;
+	bool valid;
 
 	for (i = 0; i < dev_data->hw->prom_len; i++) {
 		ret = ms_sensors_read_prom_word(
@@ -546,7 +589,12 @@ int ms_sensors_tp_read_prom(struct ms_tp_dev *dev_data)
 			return ret;
 	}
 
-	if (!ms_sensors_tp_crc_valid(dev_data->prom)) {
+	if (dev_data->hw->prom_len == 8)
+		valid = ms_sensors_tp_crc_valid_128(dev_data->prom);
+	else
+		valid = ms_sensors_tp_crc_valid_112(dev_data->prom);
+
+	if (!valid) {
 		dev_err(&dev_data->client->dev,
 			"Calibration coefficients crc check error\n");
 		return -ENODEV;
-- 
2.29.2

[PATCH v2 6/6] iio:pressure:ms5637: add ms5803 support

[Alexandre Belloni]

The ms5803 is very similar to the ms5805 but has less resolution options
and has the 128bit PROM layout.

Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
---
 Documentation/devicetree/bindings/trivial-devices.yaml | 2 ++
 drivers/iio/pressure/ms5637.c                          | 8 ++++++++
 2 files changed, 10 insertions(+)

diff --git a/Documentation/devicetree/bindings/trivial-devices.yaml b/Documentation/devicetree/bindings/trivial-devices.yaml
index e9b64be4b91e..a327130d1faa 100644
--- a/Documentation/devicetree/bindings/trivial-devices.yaml
+++ b/Documentation/devicetree/bindings/trivial-devices.yaml
@@ -153,6 +153,8 @@ properties:
             # Measurement Specialities I2C pressure and temperature sensor
           - meas,ms5637
             # Measurement Specialities I2C pressure and temperature sensor
+          - meas,ms5803
+            # Measurement Specialities I2C pressure and temperature sensor
           - meas,ms5805
             # Measurement Specialities I2C pressure and temperature sensor
           - meas,ms5837
diff --git a/drivers/iio/pressure/ms5637.c b/drivers/iio/pressure/ms5637.c
index 0a6034342714..81f683321b23 100644
--- a/drivers/iio/pressure/ms5637.c
+++ b/drivers/iio/pressure/ms5637.c
@@ -200,8 +200,15 @@ static const struct ms_tp_hw_data ms5637_hw_data  = {
 	.max_res_index = 5
 };
 
+static const struct ms_tp_hw_data ms5803_hw_data  = {
+	.prom_len = 8,
+	.max_res_index = 4
+};
+
 static const struct ms_tp_data ms5637_data = { .name = "ms5637", .hw = &ms5637_hw_data };
 
+static const struct ms_tp_data ms5803_data = { .name = "ms5803", .hw = &ms5803_hw_data };
+
 static const struct ms_tp_data ms5805_data = { .name = "ms5805", .hw = &ms5637_hw_data };
 
 static const struct ms_tp_data ms5837_data = { .name = "ms5837", .hw = &ms5637_hw_data };
@@ -222,6 +229,7 @@ MODULE_DEVICE_TABLE(i2c, ms5637_id);
 
 static const struct of_device_id ms5637_of_match[] = {
 	{ .compatible = "meas,ms5637", .data = &ms5637_data },
+	{ .compatible = "meas,ms5803", .data = &ms5803_data },
 	{ .compatible = "meas,ms5805", .data = &ms5805_data },
 	{ .compatible = "meas,ms5837", .data = &ms5837_data },
 	{ .compatible = "meas,ms8607-temppressure", .data = &ms8607_data },
-- 
2.29.2

Re: [PATCH v2 1/6] dt-bindings: trivial-devices: reorder memsic devices

[Rob Herring]

On Sun, 10 Jan 2021 00:11:43 +0100, Alexandre Belloni wrote:
> Reorder memsic compatible strings alphabetically
> 
> Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
> ---
>  Documentation/devicetree/bindings/trivial-devices.yaml | 8 ++++----
>  1 file changed, 4 insertions(+), 4 deletions(-)
> 

Acked-by: Rob Herring <robh@kernel.org>

Re: [PATCH v2 6/6] iio:pressure:ms5637: add ms5803 support

[Rob Herring]

On Sun, 10 Jan 2021 00:11:48 +0100, Alexandre Belloni wrote:
> The ms5803 is very similar to the ms5805 but has less resolution options
> and has the 128bit PROM layout.
> 
> Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
> ---
>  Documentation/devicetree/bindings/trivial-devices.yaml | 2 ++
>  drivers/iio/pressure/ms5637.c                          | 8 ++++++++
>  2 files changed, 10 insertions(+)
> 

Acked-by: Rob Herring <robh@kernel.org>

Re: [PATCH v2 0/6] iio:pressure:ms5637: add ms5803 support

[Jonathan Cameron]

On Sun, 10 Jan 2021 00:11:42 +0100
Alexandre Belloni <alexandre.belloni@bootlin.com> wrote:

> Hello,
> 
> This series adds support for the Measurement Specialities ms5803. It is
> very similar to the ms5805 but has a different PROM layout (which I
> suspect predates the ms5805 PROM layout). Also it supports less
> frequency sampling options.
> 
> After a bit of preparatory work in the ms5637 driver and its common
> library, mainly to handle the PROM layout and sample frequencies, adding
> support is trivial.
> 
> Changes in v2:
>  - Dropped "iio:pressure:ms5637: switch to probe_new" to keep the i2c_device_id
>    table.
>  - Reorder trivial-devices.yaml
LGTM. Series applied to the togreg branch of iio.git and pushed out as testing
to see if the autobuilders can find anything we missed.

thanks,

Jonathan

> 
> Alexandre Belloni (6):
>   dt-bindings: trivial-devices: reorder memsic devices
>   iio:pressure:ms5637: introduce hardware differentiation
>   iio:pressure:ms5637: limit available sample frequencies
>   iio:common:ms_sensors:ms_sensors_i2c: rework CRC calculation helper
>   iio:common:ms_sensors:ms_sensors_i2c: add support for alternative PROM
>     layout
>   iio:pressure:ms5637: add ms5803 support
> 
>  .../devicetree/bindings/trivial-devices.yaml  | 10 ++-
>  .../iio/common/ms_sensors/ms_sensors_i2c.c    | 76 ++++++++++++++----
>  .../iio/common/ms_sensors/ms_sensors_i2c.h    | 15 +++-
>  drivers/iio/pressure/ms5637.c                 | 77 +++++++++++++++----
>  4 files changed, 143 insertions(+), 35 deletions(-)
>