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Message-ID: <20241027172029.160134-5-justin@justinweiss.com>
Date: Sun, 27 Oct 2024 10:20:25 -0700
From: Justin Weiss <justin@...tinweiss.com>
To: Alex Lanzano <lanzano.alex@...il.com>,
Jonathan Cameron <jic23@...nel.org>,
Lars-Peter Clausen <lars@...afoo.de>,
Rob Herring <robh@...nel.org>,
Krzysztof Kozlowski <krzk+dt@...nel.org>,
Conor Dooley <conor+dt@...nel.org>,
Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Cc: Justin Weiss <justin@...tinweiss.com>,
linux-iio@...r.kernel.org,
devicetree@...r.kernel.org,
linux-kernel@...r.kernel.org,
"Derek J . Clark" <derekjohn.clark@...il.com>,
Philip Müller <philm@...jaro.org>
Subject: [PATCH v4 4/4] iio: imu: bmi270: Add support for BMI260
Adds support for the Bosch BMI260 6-axis IMU to the Bosch BMI270
driver. Setup and operation is nearly identical to the Bosch BMI270,
but has a different chip ID and requires different firmware.
Firmware is requested and loaded from userspace.
Adds ACPI ID BMI0160, used by several devices including the GPD Win
Mini, Aya Neo AIR Pro, and OXP Mini Pro.
GPD Win Mini:
Device (BMI2)
{
Name (_ADR, Zero) // _ADR: Address
Name (_HID, "BMI0160") // _HID: Hardware ID
Name (_CID, "BMI0160") // _CID: Compatible ID
Name (_DDN, "Accelerometer") // _DDN: DOS Device Name
Name (_UID, One) // _UID: Unique ID
Method (_CRS, 0, NotSerialized) // _CRS: Current Resource Settings
{
Name (RBUF, ResourceTemplate ()
{
I2cSerialBusV2 (0x0068, ControllerInitiated, 0x00061A80,
AddressingMode7Bit, "\\_SB.I2CB",
0x00, ResourceConsumer, , Exclusive,
)
GpioInt (Edge, ActiveLow, Exclusive, PullDefault, 0x0000,
"\\_SB.GPIO", 0x00, ResourceConsumer, ,
)
{ // Pin list
0x008B
}
})
Return (RBUF) /* \_SB_.I2CB.BMI2._CRS.RBUF */
}
...
}
Signed-off-by: Justin Weiss <justin@...tinweiss.com>
---
drivers/iio/imu/bmi270/bmi270.h | 1 +
drivers/iio/imu/bmi270/bmi270_core.c | 28 +++++++++++++++++++++++++++-
drivers/iio/imu/bmi270/bmi270_i2c.c | 9 +++++++++
drivers/iio/imu/bmi270/bmi270_spi.c | 2 ++
4 files changed, 39 insertions(+), 1 deletion(-)
diff --git a/drivers/iio/imu/bmi270/bmi270.h b/drivers/iio/imu/bmi270/bmi270.h
index 6173be929bac..fdfad5784cc5 100644
--- a/drivers/iio/imu/bmi270/bmi270.h
+++ b/drivers/iio/imu/bmi270/bmi270.h
@@ -29,6 +29,7 @@ struct bmi270_chip_info {
};
extern const struct regmap_config bmi270_regmap_config;
+extern const struct bmi270_chip_info bmi260_chip_info;
extern const struct bmi270_chip_info bmi270_chip_info;
int bmi270_core_probe(struct device *dev, struct regmap *regmap,
diff --git a/drivers/iio/imu/bmi270/bmi270_core.c b/drivers/iio/imu/bmi270/bmi270_core.c
index 27e501a15095..938cf14d46bd 100644
--- a/drivers/iio/imu/bmi270/bmi270_core.c
+++ b/drivers/iio/imu/bmi270/bmi270_core.c
@@ -14,6 +14,11 @@
#include "bmi270.h"
#define BMI270_CHIP_ID_REG 0x00
+
+/* Checked to prevent sending incompatible firmware to BMI160 devices */
+#define BMI160_CHIP_ID_VAL 0xD1
+
+#define BMI260_CHIP_ID_VAL 0x27
#define BMI270_CHIP_ID_VAL 0x24
#define BMI270_CHIP_ID_MSK GENMASK(7, 0)
@@ -64,6 +69,7 @@
#define BMI270_PWR_CTRL_ACCEL_EN_MSK BIT(2)
#define BMI270_PWR_CTRL_TEMP_EN_MSK BIT(3)
+#define BMI260_INIT_DATA_FILE "bmi260-init-data.fw"
#define BMI270_INIT_DATA_FILE "bmi270-init-data.fw"
enum bmi270_scan {
@@ -86,6 +92,13 @@ static const unsigned long bmi270_avail_scan_masks[] = {
0
};
+const struct bmi270_chip_info bmi260_chip_info = {
+ .name = "bmi260",
+ .chip_id = BMI260_CHIP_ID_VAL,
+ .fw_name = BMI260_INIT_DATA_FILE,
+};
+EXPORT_SYMBOL_NS_GPL(bmi260_chip_info, IIO_BMI270);
+
const struct bmi270_chip_info bmi270_chip_info = {
.name = "bmi270",
.chip_id = BMI270_CHIP_ID_VAL,
@@ -546,8 +559,21 @@ static int bmi270_validate_chip_id(struct bmi270_data *bmi270_device)
if (ret)
return dev_err_probe(dev, ret, "Failed to read chip id");
+ /*
+ * Some manufacturers use "BMI0160" for both the BMI160 and
+ * BMI260. If the device is actually a BMI160, the bmi160
+ * driver should handle it and this driver should not.
+ */
+ if (chip_id == BMI160_CHIP_ID_VAL)
+ return -ENODEV;
+
if (chip_id != bmi270_device->chip_info->chip_id)
- dev_info(dev, "Unknown chip id 0x%x", chip_id);
+ dev_info(dev, "Unexpected chip id 0x%x", chip_id);
+
+ if (chip_id == bmi260_chip_info.chip_id)
+ bmi270_device->chip_info = &bmi260_chip_info;
+ else if (chip_id == bmi270_chip_info.chip_id)
+ bmi270_device->chip_info = &bmi270_chip_info;
return 0;
}
diff --git a/drivers/iio/imu/bmi270/bmi270_i2c.c b/drivers/iio/imu/bmi270/bmi270_i2c.c
index 394f27996059..6bd82e4362ab 100644
--- a/drivers/iio/imu/bmi270/bmi270_i2c.c
+++ b/drivers/iio/imu/bmi270/bmi270_i2c.c
@@ -32,11 +32,19 @@ static int bmi270_i2c_probe(struct i2c_client *client)
}
static const struct i2c_device_id bmi270_i2c_id[] = {
+ { "bmi260", (kernel_ulong_t)&bmi260_chip_info },
{ "bmi270", (kernel_ulong_t)&bmi270_chip_info },
{ }
};
+static const struct acpi_device_id bmi270_acpi_match[] = {
+ /* GPD Win Mini, Aya Neo AIR Pro, OXP Mini Pro, etc. */
+ { "BMI0160", (kernel_ulong_t)&bmi260_chip_info },
+ { }
+};
+
static const struct of_device_id bmi270_of_match[] = {
+ { .compatible = "bosch,bmi260", .data = &bmi260_chip_info },
{ .compatible = "bosch,bmi270", .data = &bmi270_chip_info },
{ }
};
@@ -44,6 +52,7 @@ static const struct of_device_id bmi270_of_match[] = {
static struct i2c_driver bmi270_i2c_driver = {
.driver = {
.name = "bmi270_i2c",
+ .acpi_match_table = bmi270_acpi_match,
.of_match_table = bmi270_of_match,
},
.probe = bmi270_i2c_probe,
diff --git a/drivers/iio/imu/bmi270/bmi270_spi.c b/drivers/iio/imu/bmi270/bmi270_spi.c
index 7c2062c660d9..b1fd9fc5dc98 100644
--- a/drivers/iio/imu/bmi270/bmi270_spi.c
+++ b/drivers/iio/imu/bmi270/bmi270_spi.c
@@ -65,11 +65,13 @@ static int bmi270_spi_probe(struct spi_device *spi)
}
static const struct spi_device_id bmi270_spi_id[] = {
+ { "bmi260", (kernel_ulong_t)&bmi260_chip_info},
{ "bmi270", (kernel_ulong_t)&bmi270_chip_info },
{ }
};
static const struct of_device_id bmi270_of_match[] = {
+ { .compatible = "bosch,bmi260", .data = &bmi260_chip_info },
{ .compatible = "bosch,bmi270", .data = &bmi270_chip_info },
{ }
};
--
2.47.0
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