| Message ID | 20161008123426.8991-4-hdegoede@redhat.com |
|---|---|
| State | Not Applicable, archived |
| Headers | show |
On 08/10/16 13:34, Hans de Goede wrote: > This driver is based on the DA311 Android driver which can be found here: > https://git.matricom.net/Firmware/kernel_amlogic_meson-common/tree/1e70113a5befd07debb68f537156def84c5be57a/drivers/amlogic/input/sensor > the mir3da_* files are the DA311 driver. > > Unfortunately there is no datasheet. > > Signed-off-by: Hans de Goede <hdegoede@redhat.com> Again, minor well defined changes from V2 so I'm happy to take this without it staying on the list for long first. Lars, plenty of time to add Reviewed-by/Acked-by if you want to give them. Not to worry if not (though you and all other reviewers never get enough credit in my view!) Applied to the togreg branch of iio.git - initially pushed out as testing for the autobuilders to play with it. Thanks, Jonathan > --- > Changes in v2: > -Add proper prefix to patch Subject > -Use i2c_smbus_read_word_data() instead of i2c_smbus_read_i2c_block_data() > Changes in v3: > -Express unit in m/s^2 instead of in "G" > -Drop le16_to_cpu, i2c_smbus_read_word_data() already does this > --- > .../devicetree/bindings/i2c/trivial-devices.txt | 1 + > drivers/iio/accel/Kconfig | 10 + > drivers/iio/accel/Makefile | 1 + > drivers/iio/accel/da311.c | 305 +++++++++++++++++++++ > 4 files changed, 317 insertions(+) > create mode 100644 drivers/iio/accel/da311.c > > diff --git a/Documentation/devicetree/bindings/i2c/trivial-devices.txt b/Documentation/devicetree/bindings/i2c/trivial-devices.txt > index 4689b31..b23ded3 100644 > --- a/Documentation/devicetree/bindings/i2c/trivial-devices.txt > +++ b/Documentation/devicetree/bindings/i2c/trivial-devices.txt > @@ -124,6 +124,7 @@ microchip,mcp4662-502 Microchip 8-bit Dual I2C Digital Potentiometer with NV Mem > microchip,mcp4662-103 Microchip 8-bit Dual I2C Digital Potentiometer with NV Memory (10k) > microchip,mcp4662-503 Microchip 8-bit Dual I2C Digital Potentiometer with NV Memory (50k) > microchip,mcp4662-104 Microchip 8-bit Dual I2C Digital Potentiometer with NV Memory (100k) > +miramems,da311 MiraMEMS DA311 3-axis 12-bit digital accelerometer > national,lm63 Temperature sensor with integrated fan control > national,lm75 I2C TEMP SENSOR > national,lm80 Serial Interface ACPI-Compatible Microprocessor System Hardware Monitor > diff --git a/drivers/iio/accel/Kconfig b/drivers/iio/accel/Kconfig > index 6236fd5..c94348f 100644 > --- a/drivers/iio/accel/Kconfig > +++ b/drivers/iio/accel/Kconfig > @@ -52,6 +52,16 @@ config BMC150_ACCEL_SPI > tristate > select REGMAP_SPI > > +config DA311 > + tristate "MiraMEMS DA311 3-axis 12-bit digital accelerometer driver" > + depends on I2C > + help > + Say yes here to build support for the MiraMEMS DA311 3-axis 12-bit > + digital accelerometer. > + > + To compile this driver as a module, choose M here: the > + module will be called da311. > + > config DMARD06 > tristate "Domintech DMARD06 Digital Accelerometer Driver" > depends on OF || COMPILE_TEST > diff --git a/drivers/iio/accel/Makefile b/drivers/iio/accel/Makefile > index 9f51559..601ca59 100644 > --- a/drivers/iio/accel/Makefile > +++ b/drivers/iio/accel/Makefile > @@ -8,6 +8,7 @@ obj-$(CONFIG_BMA220) += bma220_spi.o > obj-$(CONFIG_BMC150_ACCEL) += bmc150-accel-core.o > obj-$(CONFIG_BMC150_ACCEL_I2C) += bmc150-accel-i2c.o > obj-$(CONFIG_BMC150_ACCEL_SPI) += bmc150-accel-spi.o > +obj-$(CONFIG_DA311) += da311.o > obj-$(CONFIG_DMARD06) += dmard06.o > obj-$(CONFIG_DMARD09) += dmard09.o > obj-$(CONFIG_DMARD10) += dmard10.o > diff --git a/drivers/iio/accel/da311.c b/drivers/iio/accel/da311.c > new file mode 100644 > index 0000000..537cfa8 > --- /dev/null > +++ b/drivers/iio/accel/da311.c > @@ -0,0 +1,305 @@ > +/** > + * IIO driver for the MiraMEMS DA311 3-axis accelerometer > + * > + * Copyright (c) 2016 Hans de Goede <hdegoede@redhat.com> > + * Copyright (c) 2011-2013 MiraMEMS Sensing Technology Co., Ltd. > + * > + * This program is free software; you can redistribute it and/or modify it > + * under the terms and conditions of the GNU General Public License, > + * version 2, as published by the Free Software Foundation. > + */ > + > +#include <linux/module.h> > +#include <linux/i2c.h> > +#include <linux/iio/iio.h> > +#include <linux/iio/sysfs.h> > +#include <linux/byteorder/generic.h> > + > +#define DA311_CHIP_ID 0x13 > + > +/* > + * Note register addressed go from 0 - 0x3f and then wrap. > + * For some reason there are 2 banks with 0 - 0x3f addresses, > + * rather then a single 0-0x7f bank. > + */ > + > +/* Bank 0 regs */ > +#define DA311_REG_BANK 0x0000 > +#define DA311_REG_LDO_REG 0x0006 > +#define DA311_REG_CHIP_ID 0x000f > +#define DA311_REG_TEMP_CFG_REG 0x001f > +#define DA311_REG_CTRL_REG1 0x0020 > +#define DA311_REG_CTRL_REG3 0x0022 > +#define DA311_REG_CTRL_REG4 0x0023 > +#define DA311_REG_CTRL_REG5 0x0024 > +#define DA311_REG_CTRL_REG6 0x0025 > +#define DA311_REG_STATUS_REG 0x0027 > +#define DA311_REG_OUT_X_L 0x0028 > +#define DA311_REG_OUT_X_H 0x0029 > +#define DA311_REG_OUT_Y_L 0x002a > +#define DA311_REG_OUT_Y_H 0x002b > +#define DA311_REG_OUT_Z_L 0x002c > +#define DA311_REG_OUT_Z_H 0x002d > +#define DA311_REG_INT1_CFG 0x0030 > +#define DA311_REG_INT1_SRC 0x0031 > +#define DA311_REG_INT1_THS 0x0032 > +#define DA311_REG_INT1_DURATION 0x0033 > +#define DA311_REG_INT2_CFG 0x0034 > +#define DA311_REG_INT2_SRC 0x0035 > +#define DA311_REG_INT2_THS 0x0036 > +#define DA311_REG_INT2_DURATION 0x0037 > +#define DA311_REG_CLICK_CFG 0x0038 > +#define DA311_REG_CLICK_SRC 0x0039 > +#define DA311_REG_CLICK_THS 0x003a > +#define DA311_REG_TIME_LIMIT 0x003b > +#define DA311_REG_TIME_LATENCY 0x003c > +#define DA311_REG_TIME_WINDOW 0x003d > + > +/* Bank 1 regs */ > +#define DA311_REG_SOFT_RESET 0x0105 > +#define DA311_REG_OTP_XOFF_L 0x0110 > +#define DA311_REG_OTP_XOFF_H 0x0111 > +#define DA311_REG_OTP_YOFF_L 0x0112 > +#define DA311_REG_OTP_YOFF_H 0x0113 > +#define DA311_REG_OTP_ZOFF_L 0x0114 > +#define DA311_REG_OTP_ZOFF_H 0x0115 > +#define DA311_REG_OTP_XSO 0x0116 > +#define DA311_REG_OTP_YSO 0x0117 > +#define DA311_REG_OTP_ZSO 0x0118 > +#define DA311_REG_OTP_TRIM_OSC 0x011b > +#define DA311_REG_LPF_ABSOLUTE 0x011c > +#define DA311_REG_TEMP_OFF1 0x0127 > +#define DA311_REG_TEMP_OFF2 0x0128 > +#define DA311_REG_TEMP_OFF3 0x0129 > +#define DA311_REG_OTP_TRIM_THERM_H 0x011a > + > +/* > + * a value of + or -1024 corresponds to + or - 1G > + * scale = 9.81 / 1024 = 0.009580078 > + */ > + > +static const int da311_nscale = 9580078; > + > +#define DA311_CHANNEL(reg, axis) { \ > + .type = IIO_ACCEL, \ > + .address = reg, \ > + .modified = 1, \ > + .channel2 = IIO_MOD_##axis, \ > + .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \ > + .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE), \ > +} > + > +static const struct iio_chan_spec da311_channels[] = { > + /* | 0x80 comes from the android driver */ > + DA311_CHANNEL(DA311_REG_OUT_X_L | 0x80, X), > + DA311_CHANNEL(DA311_REG_OUT_Y_L | 0x80, Y), > + DA311_CHANNEL(DA311_REG_OUT_Z_L | 0x80, Z), > +}; > + > +struct da311_data { > + struct i2c_client *client; > +}; > + > +static int da311_register_mask_write(struct i2c_client *client, u16 addr, > + u8 mask, u8 data) > +{ > + int ret; > + u8 tmp_data = 0; > + > + if (addr & 0xff00) { > + /* Select bank 1 */ > + ret = i2c_smbus_write_byte_data(client, DA311_REG_BANK, 0x01); > + if (ret < 0) > + return ret; > + } > + > + if (mask != 0xff) { > + ret = i2c_smbus_read_byte_data(client, addr); > + if (ret < 0) > + return ret; > + tmp_data = ret; > + } > + > + tmp_data &= ~mask; > + tmp_data |= data & mask; > + ret = i2c_smbus_write_byte_data(client, addr & 0xff, tmp_data); > + if (ret < 0) > + return ret; > + > + if (addr & 0xff00) { > + /* Back to bank 0 */ > + ret = i2c_smbus_write_byte_data(client, DA311_REG_BANK, 0x00); > + if (ret < 0) > + return ret; > + } > + > + return 0; > +} > + > +/* Init sequence taken from the android driver */ > +static int da311_reset(struct i2c_client *client) > +{ > + const struct { > + u16 addr; > + u8 mask; > + u8 data; > + } init_data[] = { > + { DA311_REG_TEMP_CFG_REG, 0xff, 0x08 }, > + { DA311_REG_CTRL_REG5, 0xff, 0x80 }, > + { DA311_REG_CTRL_REG4, 0x30, 0x00 }, > + { DA311_REG_CTRL_REG1, 0xff, 0x6f }, > + { DA311_REG_TEMP_CFG_REG, 0xff, 0x88 }, > + { DA311_REG_LDO_REG, 0xff, 0x02 }, > + { DA311_REG_OTP_TRIM_OSC, 0xff, 0x27 }, > + { DA311_REG_LPF_ABSOLUTE, 0xff, 0x30 }, > + { DA311_REG_TEMP_OFF1, 0xff, 0x3f }, > + { DA311_REG_TEMP_OFF2, 0xff, 0xff }, > + { DA311_REG_TEMP_OFF3, 0xff, 0x0f }, > + }; > + int i, ret; > + > + /* Reset */ > + ret = da311_register_mask_write(client, DA311_REG_SOFT_RESET, > + 0xff, 0xaa); > + if (ret < 0) > + return ret; > + > + for (i = 0; i < ARRAY_SIZE(init_data); i++) { > + ret = da311_register_mask_write(client, > + init_data[i].addr, > + init_data[i].mask, > + init_data[i].data); > + if (ret < 0) > + return ret; > + } > + > + return 0; > +} > + > +static int da311_enable(struct i2c_client *client, bool enable) > +{ > + u8 data = enable ? 0x00 : 0x20; > + > + return da311_register_mask_write(client, DA311_REG_TEMP_CFG_REG, > + 0x20, data); > +} > + > +static int da311_read_raw(struct iio_dev *indio_dev, > + struct iio_chan_spec const *chan, > + int *val, int *val2, long mask) > +{ > + struct da311_data *data = iio_priv(indio_dev); > + int ret; > + > + switch (mask) { > + case IIO_CHAN_INFO_RAW: > + ret = i2c_smbus_read_word_data(data->client, chan->address); > + if (ret < 0) > + return ret; > + /* > + * Values are 12 bits, stored as 16 bits with the 4 > + * least significant bits always 0. > + */ > + *val = (short)ret >> 4; > + return IIO_VAL_INT; > + case IIO_CHAN_INFO_SCALE: > + *val = 0; > + *val2 = da311_nscale; > + return IIO_VAL_INT_PLUS_NANO; > + default: > + return -EINVAL; > + } > +} > + > +static const struct iio_info da311_info = { > + .driver_module = THIS_MODULE, > + .read_raw = da311_read_raw, > +}; > + > +static int da311_probe(struct i2c_client *client, > + const struct i2c_device_id *id) > +{ > + int ret; > + struct iio_dev *indio_dev; > + struct da311_data *data; > + > + ret = i2c_smbus_read_byte_data(client, DA311_REG_CHIP_ID); > + if (ret != DA311_CHIP_ID) > + return (ret < 0) ? ret : -ENODEV; > + > + indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data)); > + if (!indio_dev) > + return -ENOMEM; > + > + data = iio_priv(indio_dev); > + data->client = client; > + i2c_set_clientdata(client, indio_dev); > + > + indio_dev->dev.parent = &client->dev; > + indio_dev->info = &da311_info; > + indio_dev->name = "da311"; > + indio_dev->modes = INDIO_DIRECT_MODE; > + indio_dev->channels = da311_channels; > + indio_dev->num_channels = ARRAY_SIZE(da311_channels); > + > + ret = da311_reset(client); > + if (ret < 0) > + return ret; > + > + ret = da311_enable(client, true); > + if (ret < 0) > + return ret; > + > + ret = iio_device_register(indio_dev); > + if (ret < 0) { > + dev_err(&client->dev, "device_register failed\n"); > + da311_enable(client, false); > + } > + > + return ret; > +} > + > +static int da311_remove(struct i2c_client *client) > +{ > + struct iio_dev *indio_dev = i2c_get_clientdata(client); > + > + iio_device_unregister(indio_dev); > + > + return da311_enable(client, false); > +} > + > +#ifdef CONFIG_PM_SLEEP > +static int da311_suspend(struct device *dev) > +{ > + return da311_enable(to_i2c_client(dev), false); > +} > + > +static int da311_resume(struct device *dev) > +{ > + return da311_enable(to_i2c_client(dev), true); > +} > +#endif > + > +static SIMPLE_DEV_PM_OPS(da311_pm_ops, da311_suspend, da311_resume); > + > +static const struct i2c_device_id da311_i2c_id[] = { > + {"da311", 0}, > + {} > +}; > +MODULE_DEVICE_TABLE(i2c, da311_i2c_id); > + > +static struct i2c_driver da311_driver = { > + .driver = { > + .name = "da311", > + .pm = &da311_pm_ops, > + }, > + .probe = da311_probe, > + .remove = da311_remove, > + .id_table = da311_i2c_id, > +}; > + > +module_i2c_driver(da311_driver); > + > +MODULE_AUTHOR("Hans de Goede <hdegoede@redhat.com>"); > +MODULE_DESCRIPTION("MiraMEMS DA311 3-Axis Accelerometer driver"); > +MODULE_LICENSE("GPL v2"); > -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
On Sat, Oct 08, 2016 at 02:34:25PM +0200, Hans de Goede wrote: > This driver is based on the DA311 Android driver which can be found here: > https://git.matricom.net/Firmware/kernel_amlogic_meson-common/tree/1e70113a5befd07debb68f537156def84c5be57a/drivers/amlogic/input/sensor > the mir3da_* files are the DA311 driver. > > Unfortunately there is no datasheet. > > Signed-off-by: Hans de Goede <hdegoede@redhat.com> > --- > Changes in v2: > -Add proper prefix to patch Subject > -Use i2c_smbus_read_word_data() instead of i2c_smbus_read_i2c_block_data() > Changes in v3: > -Express unit in m/s^2 instead of in "G" > -Drop le16_to_cpu, i2c_smbus_read_word_data() already does this > --- > .../devicetree/bindings/i2c/trivial-devices.txt | 1 + Acked-by: Rob Herring <robh@kernel.org> > drivers/iio/accel/Kconfig | 10 + > drivers/iio/accel/Makefile | 1 + > drivers/iio/accel/da311.c | 305 +++++++++++++++++++++ > 4 files changed, 317 insertions(+) > create mode 100644 drivers/iio/accel/da311.c -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
On 10/10/16 22:41, Rob Herring wrote: > On Sat, Oct 08, 2016 at 02:34:25PM +0200, Hans de Goede wrote: >> This driver is based on the DA311 Android driver which can be found here: >> https://git.matricom.net/Firmware/kernel_amlogic_meson-common/tree/1e70113a5befd07debb68f537156def84c5be57a/drivers/amlogic/input/sensor >> the mir3da_* files are the DA311 driver. >> >> Unfortunately there is no datasheet. >> >> Signed-off-by: Hans de Goede <hdegoede@redhat.com> >> --- >> Changes in v2: >> -Add proper prefix to patch Subject >> -Use i2c_smbus_read_word_data() instead of i2c_smbus_read_i2c_block_data() >> Changes in v3: >> -Express unit in m/s^2 instead of in "G" >> -Drop le16_to_cpu, i2c_smbus_read_word_data() already does this >> --- >> .../devicetree/bindings/i2c/trivial-devices.txt | 1 + > > Acked-by: Rob Herring <robh@kernel.org> added. > >> drivers/iio/accel/Kconfig | 10 + >> drivers/iio/accel/Makefile | 1 + >> drivers/iio/accel/da311.c | 305 +++++++++++++++++++++ >> 4 files changed, 317 insertions(+) >> create mode 100644 drivers/iio/accel/da311.c -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
diff --git a/Documentation/devicetree/bindings/i2c/trivial-devices.txt b/Documentation/devicetree/bindings/i2c/trivial-devices.txt index 4689b31..b23ded3 100644 --- a/Documentation/devicetree/bindings/i2c/trivial-devices.txt +++ b/Documentation/devicetree/bindings/i2c/trivial-devices.txt @@ -124,6 +124,7 @@ microchip,mcp4662-502 Microchip 8-bit Dual I2C Digital Potentiometer with NV Mem microchip,mcp4662-103 Microchip 8-bit Dual I2C Digital Potentiometer with NV Memory (10k) microchip,mcp4662-503 Microchip 8-bit Dual I2C Digital Potentiometer with NV Memory (50k) microchip,mcp4662-104 Microchip 8-bit Dual I2C Digital Potentiometer with NV Memory (100k) +miramems,da311 MiraMEMS DA311 3-axis 12-bit digital accelerometer national,lm63 Temperature sensor with integrated fan control national,lm75 I2C TEMP SENSOR national,lm80 Serial Interface ACPI-Compatible Microprocessor System Hardware Monitor diff --git a/drivers/iio/accel/Kconfig b/drivers/iio/accel/Kconfig index 6236fd5..c94348f 100644 --- a/drivers/iio/accel/Kconfig +++ b/drivers/iio/accel/Kconfig @@ -52,6 +52,16 @@ config BMC150_ACCEL_SPI tristate select REGMAP_SPI +config DA311 + tristate "MiraMEMS DA311 3-axis 12-bit digital accelerometer driver" + depends on I2C + help + Say yes here to build support for the MiraMEMS DA311 3-axis 12-bit + digital accelerometer. + + To compile this driver as a module, choose M here: the + module will be called da311. + config DMARD06 tristate "Domintech DMARD06 Digital Accelerometer Driver" depends on OF || COMPILE_TEST diff --git a/drivers/iio/accel/Makefile b/drivers/iio/accel/Makefile index 9f51559..601ca59 100644 --- a/drivers/iio/accel/Makefile +++ b/drivers/iio/accel/Makefile @@ -8,6 +8,7 @@ obj-$(CONFIG_BMA220) += bma220_spi.o obj-$(CONFIG_BMC150_ACCEL) += bmc150-accel-core.o obj-$(CONFIG_BMC150_ACCEL_I2C) += bmc150-accel-i2c.o obj-$(CONFIG_BMC150_ACCEL_SPI) += bmc150-accel-spi.o +obj-$(CONFIG_DA311) += da311.o obj-$(CONFIG_DMARD06) += dmard06.o obj-$(CONFIG_DMARD09) += dmard09.o obj-$(CONFIG_DMARD10) += dmard10.o diff --git a/drivers/iio/accel/da311.c b/drivers/iio/accel/da311.c new file mode 100644 index 0000000..537cfa8 --- /dev/null +++ b/drivers/iio/accel/da311.c @@ -0,0 +1,305 @@ +/** + * IIO driver for the MiraMEMS DA311 3-axis accelerometer + * + * Copyright (c) 2016 Hans de Goede <hdegoede@redhat.com> + * Copyright (c) 2011-2013 MiraMEMS Sensing Technology Co., Ltd. + * + * This program is free software; you can redistribute it and/or modify it + * under the terms and conditions of the GNU General Public License, + * version 2, as published by the Free Software Foundation. + */ + +#include <linux/module.h> +#include <linux/i2c.h> +#include <linux/iio/iio.h> +#include <linux/iio/sysfs.h> +#include <linux/byteorder/generic.h> + +#define DA311_CHIP_ID 0x13 + +/* + * Note register addressed go from 0 - 0x3f and then wrap. + * For some reason there are 2 banks with 0 - 0x3f addresses, + * rather then a single 0-0x7f bank. + */ + +/* Bank 0 regs */ +#define DA311_REG_BANK 0x0000 +#define DA311_REG_LDO_REG 0x0006 +#define DA311_REG_CHIP_ID 0x000f +#define DA311_REG_TEMP_CFG_REG 0x001f +#define DA311_REG_CTRL_REG1 0x0020 +#define DA311_REG_CTRL_REG3 0x0022 +#define DA311_REG_CTRL_REG4 0x0023 +#define DA311_REG_CTRL_REG5 0x0024 +#define DA311_REG_CTRL_REG6 0x0025 +#define DA311_REG_STATUS_REG 0x0027 +#define DA311_REG_OUT_X_L 0x0028 +#define DA311_REG_OUT_X_H 0x0029 +#define DA311_REG_OUT_Y_L 0x002a +#define DA311_REG_OUT_Y_H 0x002b +#define DA311_REG_OUT_Z_L 0x002c +#define DA311_REG_OUT_Z_H 0x002d +#define DA311_REG_INT1_CFG 0x0030 +#define DA311_REG_INT1_SRC 0x0031 +#define DA311_REG_INT1_THS 0x0032 +#define DA311_REG_INT1_DURATION 0x0033 +#define DA311_REG_INT2_CFG 0x0034 +#define DA311_REG_INT2_SRC 0x0035 +#define DA311_REG_INT2_THS 0x0036 +#define DA311_REG_INT2_DURATION 0x0037 +#define DA311_REG_CLICK_CFG 0x0038 +#define DA311_REG_CLICK_SRC 0x0039 +#define DA311_REG_CLICK_THS 0x003a +#define DA311_REG_TIME_LIMIT 0x003b +#define DA311_REG_TIME_LATENCY 0x003c +#define DA311_REG_TIME_WINDOW 0x003d + +/* Bank 1 regs */ +#define DA311_REG_SOFT_RESET 0x0105 +#define DA311_REG_OTP_XOFF_L 0x0110 +#define DA311_REG_OTP_XOFF_H 0x0111 +#define DA311_REG_OTP_YOFF_L 0x0112 +#define DA311_REG_OTP_YOFF_H 0x0113 +#define DA311_REG_OTP_ZOFF_L 0x0114 +#define DA311_REG_OTP_ZOFF_H 0x0115 +#define DA311_REG_OTP_XSO 0x0116 +#define DA311_REG_OTP_YSO 0x0117 +#define DA311_REG_OTP_ZSO 0x0118 +#define DA311_REG_OTP_TRIM_OSC 0x011b +#define DA311_REG_LPF_ABSOLUTE 0x011c +#define DA311_REG_TEMP_OFF1 0x0127 +#define DA311_REG_TEMP_OFF2 0x0128 +#define DA311_REG_TEMP_OFF3 0x0129 +#define DA311_REG_OTP_TRIM_THERM_H 0x011a + +/* + * a value of + or -1024 corresponds to + or - 1G + * scale = 9.81 / 1024 = 0.009580078 + */ + +static const int da311_nscale = 9580078; + +#define DA311_CHANNEL(reg, axis) { \ + .type = IIO_ACCEL, \ + .address = reg, \ + .modified = 1, \ + .channel2 = IIO_MOD_##axis, \ + .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \ + .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE), \ +} + +static const struct iio_chan_spec da311_channels[] = { + /* | 0x80 comes from the android driver */ + DA311_CHANNEL(DA311_REG_OUT_X_L | 0x80, X), + DA311_CHANNEL(DA311_REG_OUT_Y_L | 0x80, Y), + DA311_CHANNEL(DA311_REG_OUT_Z_L | 0x80, Z), +}; + +struct da311_data { + struct i2c_client *client; +}; + +static int da311_register_mask_write(struct i2c_client *client, u16 addr, + u8 mask, u8 data) +{ + int ret; + u8 tmp_data = 0; + + if (addr & 0xff00) { + /* Select bank 1 */ + ret = i2c_smbus_write_byte_data(client, DA311_REG_BANK, 0x01); + if (ret < 0) + return ret; + } + + if (mask != 0xff) { + ret = i2c_smbus_read_byte_data(client, addr); + if (ret < 0) + return ret; + tmp_data = ret; + } + + tmp_data &= ~mask; + tmp_data |= data & mask; + ret = i2c_smbus_write_byte_data(client, addr & 0xff, tmp_data); + if (ret < 0) + return ret; + + if (addr & 0xff00) { + /* Back to bank 0 */ + ret = i2c_smbus_write_byte_data(client, DA311_REG_BANK, 0x00); + if (ret < 0) + return ret; + } + + return 0; +} + +/* Init sequence taken from the android driver */ +static int da311_reset(struct i2c_client *client) +{ + const struct { + u16 addr; + u8 mask; + u8 data; + } init_data[] = { + { DA311_REG_TEMP_CFG_REG, 0xff, 0x08 }, + { DA311_REG_CTRL_REG5, 0xff, 0x80 }, + { DA311_REG_CTRL_REG4, 0x30, 0x00 }, + { DA311_REG_CTRL_REG1, 0xff, 0x6f }, + { DA311_REG_TEMP_CFG_REG, 0xff, 0x88 }, + { DA311_REG_LDO_REG, 0xff, 0x02 }, + { DA311_REG_OTP_TRIM_OSC, 0xff, 0x27 }, + { DA311_REG_LPF_ABSOLUTE, 0xff, 0x30 }, + { DA311_REG_TEMP_OFF1, 0xff, 0x3f }, + { DA311_REG_TEMP_OFF2, 0xff, 0xff }, + { DA311_REG_TEMP_OFF3, 0xff, 0x0f }, + }; + int i, ret; + + /* Reset */ + ret = da311_register_mask_write(client, DA311_REG_SOFT_RESET, + 0xff, 0xaa); + if (ret < 0) + return ret; + + for (i = 0; i < ARRAY_SIZE(init_data); i++) { + ret = da311_register_mask_write(client, + init_data[i].addr, + init_data[i].mask, + init_data[i].data); + if (ret < 0) + return ret; + } + + return 0; +} + +static int da311_enable(struct i2c_client *client, bool enable) +{ + u8 data = enable ? 0x00 : 0x20; + + return da311_register_mask_write(client, DA311_REG_TEMP_CFG_REG, + 0x20, data); +} + +static int da311_read_raw(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, + int *val, int *val2, long mask) +{ + struct da311_data *data = iio_priv(indio_dev); + int ret; + + switch (mask) { + case IIO_CHAN_INFO_RAW: + ret = i2c_smbus_read_word_data(data->client, chan->address); + if (ret < 0) + return ret; + /* + * Values are 12 bits, stored as 16 bits with the 4 + * least significant bits always 0. + */ + *val = (short)ret >> 4; + return IIO_VAL_INT; + case IIO_CHAN_INFO_SCALE: + *val = 0; + *val2 = da311_nscale; + return IIO_VAL_INT_PLUS_NANO; + default: + return -EINVAL; + } +} + +static const struct iio_info da311_info = { + .driver_module = THIS_MODULE, + .read_raw = da311_read_raw, +}; + +static int da311_probe(struct i2c_client *client, + const struct i2c_device_id *id) +{ + int ret; + struct iio_dev *indio_dev; + struct da311_data *data; + + ret = i2c_smbus_read_byte_data(client, DA311_REG_CHIP_ID); + if (ret != DA311_CHIP_ID) + return (ret < 0) ? ret : -ENODEV; + + indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data)); + if (!indio_dev) + return -ENOMEM; + + data = iio_priv(indio_dev); + data->client = client; + i2c_set_clientdata(client, indio_dev); + + indio_dev->dev.parent = &client->dev; + indio_dev->info = &da311_info; + indio_dev->name = "da311"; + indio_dev->modes = INDIO_DIRECT_MODE; + indio_dev->channels = da311_channels; + indio_dev->num_channels = ARRAY_SIZE(da311_channels); + + ret = da311_reset(client); + if (ret < 0) + return ret; + + ret = da311_enable(client, true); + if (ret < 0) + return ret; + + ret = iio_device_register(indio_dev); + if (ret < 0) { + dev_err(&client->dev, "device_register failed\n"); + da311_enable(client, false); + } + + return ret; +} + +static int da311_remove(struct i2c_client *client) +{ + struct iio_dev *indio_dev = i2c_get_clientdata(client); + + iio_device_unregister(indio_dev); + + return da311_enable(client, false); +} + +#ifdef CONFIG_PM_SLEEP +static int da311_suspend(struct device *dev) +{ + return da311_enable(to_i2c_client(dev), false); +} + +static int da311_resume(struct device *dev) +{ + return da311_enable(to_i2c_client(dev), true); +} +#endif + +static SIMPLE_DEV_PM_OPS(da311_pm_ops, da311_suspend, da311_resume); + +static const struct i2c_device_id da311_i2c_id[] = { + {"da311", 0}, + {} +}; +MODULE_DEVICE_TABLE(i2c, da311_i2c_id); + +static struct i2c_driver da311_driver = { + .driver = { + .name = "da311", + .pm = &da311_pm_ops, + }, + .probe = da311_probe, + .remove = da311_remove, + .id_table = da311_i2c_id, +}; + +module_i2c_driver(da311_driver); + +MODULE_AUTHOR("Hans de Goede <hdegoede@redhat.com>"); +MODULE_DESCRIPTION("MiraMEMS DA311 3-Axis Accelerometer driver"); +MODULE_LICENSE("GPL v2");
This driver is based on the DA311 Android driver which can be found here: https://git.matricom.net/Firmware/kernel_amlogic_meson-common/tree/1e70113a5befd07debb68f537156def84c5be57a/drivers/amlogic/input/sensor the mir3da_* files are the DA311 driver. Unfortunately there is no datasheet. Signed-off-by: Hans de Goede <hdegoede@redhat.com> --- Changes in v2: -Add proper prefix to patch Subject -Use i2c_smbus_read_word_data() instead of i2c_smbus_read_i2c_block_data() Changes in v3: -Express unit in m/s^2 instead of in "G" -Drop le16_to_cpu, i2c_smbus_read_word_data() already does this --- .../devicetree/bindings/i2c/trivial-devices.txt | 1 + drivers/iio/accel/Kconfig | 10 + drivers/iio/accel/Makefile | 1 + drivers/iio/accel/da311.c | 305 +++++++++++++++++++++ 4 files changed, 317 insertions(+) create mode 100644 drivers/iio/accel/da311.c