iio:pressure: initial zpa2326 barometer support
Introduce driver for Murata ZPA2326 pressure and temperature sensor: http://www.murata.com/en-us/products/productdetail?partno=ZPA2326-0311A-R Signed-off-by: Gregor Boirie <gregor.boirie@parrot.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org>hifive-unleashed-5.1
Gregor Boirie
Jonathan Cameron
parent
063e3303a9
commit
03b262f2bb
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@ -0,0 +1,31 @@
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Murata ZPA2326 pressure sensor
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Pressure sensor from Murata with SPI and I2C bus interfaces.
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Required properties:
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- compatible: "murata,zpa2326"
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- reg: the I2C address or SPI chip select the device will respond to
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Recommended properties for SPI bus usage:
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- spi-max-frequency: maximum SPI bus frequency as documented in
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Documentation/devicetree/bindings/spi/spi-bus.txt
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Optional properties:
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- vref-supply: an optional regulator that needs to be on to provide VREF
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power to the sensor
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- vdd-supply: an optional regulator that needs to be on to provide VDD
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power to the sensor
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- interrupt-parent: phandle to the parent interrupt controller as documented in
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Documentation/devicetree/bindings/interrupt-controller/interrupts.txt
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- interrupts: interrupt mapping for IRQ as documented in
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Documentation/devicetree/bindings/interrupt-controller/interrupts.txt
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Example:
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zpa2326@5c {
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compatible = "murata,zpa2326";
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reg = <0x5c>;
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interrupt-parent = <&gpio>;
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interrupts = <12>;
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vdd-supply = <&ldo_1v8_gnss>;
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};
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@ -187,4 +187,26 @@ config HP206C
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This driver can also be built as a module. If so, the module will
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be called hp206c.
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config ZPA2326
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tristate "Murata ZPA2326 pressure sensor driver"
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select IIO_BUFFER
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select IIO_TRIGGERED_BUFFER
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select REGMAP
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select ZPA2326_I2C if I2C
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select ZPA2326_SPI if SPI_MASTER
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help
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Say Y here to build support for the Murata ZPA2326 pressure and
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temperature sensor.
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To compile this driver as a module, choose M here: the module will
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be called zpa2326.
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config ZPA2326_I2C
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tristate
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select REGMAP_I2C
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config ZPA2326_SPI
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tristate
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select REGMAP_SPI
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endmenu
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@ -22,6 +22,9 @@ st_pressure-y := st_pressure_core.o
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st_pressure-$(CONFIG_IIO_BUFFER) += st_pressure_buffer.o
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obj-$(CONFIG_T5403) += t5403.o
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obj-$(CONFIG_HP206C) += hp206c.o
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obj-$(CONFIG_ZPA2326) += zpa2326.o
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obj-$(CONFIG_ZPA2326_I2C) += zpa2326_i2c.o
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obj-$(CONFIG_ZPA2326_SPI) += zpa2326_spi.o
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obj-$(CONFIG_IIO_ST_PRESS_I2C) += st_pressure_i2c.o
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obj-$(CONFIG_IIO_ST_PRESS_SPI) += st_pressure_spi.o
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File diff suppressed because it is too large
Load Diff
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@ -0,0 +1,89 @@
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/*
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* Murata ZPA2326 pressure and temperature sensor IIO driver
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*
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* Copyright (c) 2016 Parrot S.A.
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*
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* Author: Gregor Boirie <gregor.boirie@parrot.com>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 as published by
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* the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*/
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#ifndef _ZPA2326_H
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#define _ZPA2326_H
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/* Register map. */
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#define ZPA2326_REF_P_XL_REG (0x8)
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#define ZPA2326_REF_P_L_REG (0x9)
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#define ZPA2326_REF_P_H_REG (0xa)
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#define ZPA2326_DEVICE_ID_REG (0xf)
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#define ZPA2326_DEVICE_ID (0xb9)
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#define ZPA2326_RES_CONF_REG (0x10)
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#define ZPA2326_CTRL_REG0_REG (0x20)
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#define ZPA2326_CTRL_REG0_ONE_SHOT BIT(0)
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#define ZPA2326_CTRL_REG0_ENABLE BIT(1)
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#define ZPA2326_CTRL_REG1_REG (0x21)
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#define ZPA2326_CTRL_REG1_MASK_DATA_READY BIT(2)
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#define ZPA2326_CTRL_REG2_REG (0x22)
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#define ZPA2326_CTRL_REG2_SWRESET BIT(2)
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#define ZPA2326_CTRL_REG3_REG (0x23)
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#define ZPA2326_CTRL_REG3_ODR_SHIFT (4)
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#define ZPA2326_CTRL_REG3_ENABLE_MEAS BIT(7)
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#define ZPA2326_INT_SOURCE_REG (0x24)
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#define ZPA2326_INT_SOURCE_DATA_READY BIT(2)
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#define ZPA2326_THS_P_LOW_REG (0x25)
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#define ZPA2326_THS_P_HIGH_REG (0x26)
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#define ZPA2326_STATUS_REG (0x27)
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#define ZPA2326_STATUS_P_DA BIT(1)
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#define ZPA2326_STATUS_FIFO_E BIT(2)
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#define ZPA2326_STATUS_P_OR BIT(5)
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#define ZPA2326_PRESS_OUT_XL_REG (0x28)
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#define ZPA2326_PRESS_OUT_L_REG (0x29)
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#define ZPA2326_PRESS_OUT_H_REG (0x2a)
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#define ZPA2326_TEMP_OUT_L_REG (0x2b)
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#define ZPA2326_TEMP_OUT_H_REG (0x2c)
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struct device;
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struct regmap;
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bool zpa2326_isreg_writeable(struct device *dev, unsigned int reg);
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bool zpa2326_isreg_readable(struct device *dev, unsigned int reg);
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bool zpa2326_isreg_precious(struct device *dev, unsigned int reg);
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/**
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* zpa2326_probe() - Instantiate and register core ZPA2326 IIO device
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* @parent: Hardware sampling device the created IIO device will be a child of.
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* @name: Arbitrary name to identify the device.
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* @irq: Interrupt line, negative if none.
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* @hwid: Expected device hardware id.
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* @regmap: Registers map used to abstract underlying bus accesses.
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*
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* Return: Zero when successful, a negative error code otherwise.
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*/
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int zpa2326_probe(struct device *parent,
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const char *name,
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int irq,
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unsigned int hwid,
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struct regmap *regmap);
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/**
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* zpa2326_remove() - Unregister and destroy core ZPA2326 IIO device.
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* @parent: Hardware sampling device the IIO device to remove is a child of.
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*/
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void zpa2326_remove(const struct device *parent);
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#ifdef CONFIG_PM
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#include <linux/pm.h>
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extern const struct dev_pm_ops zpa2326_pm_ops;
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#define ZPA2326_PM_OPS (&zpa2326_pm_ops)
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#else
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#define ZPA2326_PM_OPS (NULL)
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#endif
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#endif
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@ -0,0 +1,99 @@
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/*
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* Murata ZPA2326 I2C pressure and temperature sensor driver
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*
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* Copyright (c) 2016 Parrot S.A.
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*
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* Author: Gregor Boirie <gregor.boirie@parrot.com>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 as published by
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* the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*/
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#include <linux/module.h>
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#include <linux/regmap.h>
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#include <linux/i2c.h>
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#include <linux/of_device.h>
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#include "zpa2326.h"
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/*
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* read_flag_mask:
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* - address bit 7 must be set to request a register read operation
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*/
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static const struct regmap_config zpa2326_regmap_i2c_config = {
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.reg_bits = 8,
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.val_bits = 8,
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.writeable_reg = zpa2326_isreg_writeable,
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.readable_reg = zpa2326_isreg_readable,
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.precious_reg = zpa2326_isreg_precious,
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.max_register = ZPA2326_TEMP_OUT_H_REG,
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.read_flag_mask = BIT(7),
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.cache_type = REGCACHE_NONE,
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};
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static unsigned int zpa2326_i2c_hwid(const struct i2c_client *client)
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{
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#define ZPA2326_SA0(_addr) (_addr & BIT(0))
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#define ZPA2326_DEVICE_ID_SA0_SHIFT (1)
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/* Identification register bit 1 mirrors device address bit 0. */
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return (ZPA2326_DEVICE_ID |
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(ZPA2326_SA0(client->addr) << ZPA2326_DEVICE_ID_SA0_SHIFT));
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}
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static int zpa2326_probe_i2c(struct i2c_client *client,
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const struct i2c_device_id *i2c_id)
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{
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struct regmap *regmap;
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regmap = devm_regmap_init_i2c(client, &zpa2326_regmap_i2c_config);
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if (IS_ERR(regmap)) {
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dev_err(&client->dev, "failed to init registers map");
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return PTR_ERR(regmap);
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}
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return zpa2326_probe(&client->dev, i2c_id->name, client->irq,
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zpa2326_i2c_hwid(client), regmap);
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}
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static int zpa2326_remove_i2c(struct i2c_client *client)
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{
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zpa2326_remove(&client->dev);
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return 0;
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}
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static const struct i2c_device_id zpa2326_i2c_ids[] = {
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{ "zpa2326", 0 },
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{ },
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};
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MODULE_DEVICE_TABLE(i2c, zpa2326_i2c_ids);
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#if defined(CONFIG_OF)
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static const struct of_device_id zpa2326_i2c_matches[] = {
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{ .compatible = "murata,zpa2326" },
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{ }
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};
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MODULE_DEVICE_TABLE(of, zpa2326_i2c_matches);
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#endif
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static struct i2c_driver zpa2326_i2c_driver = {
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.driver = {
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.name = "zpa2326-i2c",
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.of_match_table = of_match_ptr(zpa2326_i2c_matches),
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.pm = ZPA2326_PM_OPS,
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},
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.probe = zpa2326_probe_i2c,
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.remove = zpa2326_remove_i2c,
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.id_table = zpa2326_i2c_ids,
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};
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module_i2c_driver(zpa2326_i2c_driver);
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MODULE_AUTHOR("Gregor Boirie <gregor.boirie@parrot.com>");
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MODULE_DESCRIPTION("I2C driver for Murata ZPA2326 pressure sensor");
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MODULE_LICENSE("GPL v2");
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@ -0,0 +1,103 @@
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/*
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* Murata ZPA2326 SPI pressure and temperature sensor driver
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*
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* Copyright (c) 2016 Parrot S.A.
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*
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* Author: Gregor Boirie <gregor.boirie@parrot.com>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 as published by
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* the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*/
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#include <linux/module.h>
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#include <linux/regmap.h>
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#include <linux/spi/spi.h>
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#include <linux/of_device.h>
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#include "zpa2326.h"
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/*
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* read_flag_mask:
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* - address bit 7 must be set to request a register read operation
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* - address bit 6 must be set to request register address auto increment
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*/
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static const struct regmap_config zpa2326_regmap_spi_config = {
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.reg_bits = 8,
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.val_bits = 8,
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.writeable_reg = zpa2326_isreg_writeable,
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.readable_reg = zpa2326_isreg_readable,
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.precious_reg = zpa2326_isreg_precious,
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.max_register = ZPA2326_TEMP_OUT_H_REG,
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.read_flag_mask = BIT(7) | BIT(6),
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.cache_type = REGCACHE_NONE,
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};
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static int zpa2326_probe_spi(struct spi_device *spi)
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{
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struct regmap *regmap;
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int err;
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regmap = devm_regmap_init_spi(spi, &zpa2326_regmap_spi_config);
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if (IS_ERR(regmap)) {
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dev_err(&spi->dev, "failed to init registers map");
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return PTR_ERR(regmap);
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}
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/*
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* Enforce SPI slave settings to prevent from DT misconfiguration.
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*
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* Clock is idle high. Sampling happens on trailing edge, i.e., rising
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* edge. Maximum bus frequency is 1 MHz. Registers are 8 bits wide.
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*/
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spi->mode = SPI_MODE_3;
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spi->max_speed_hz = min(spi->max_speed_hz, 1000000U);
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spi->bits_per_word = 8;
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err = spi_setup(spi);
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if (err < 0)
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return err;
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return zpa2326_probe(&spi->dev, spi_get_device_id(spi)->name,
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spi->irq, ZPA2326_DEVICE_ID, regmap);
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}
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static int zpa2326_remove_spi(struct spi_device *spi)
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{
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zpa2326_remove(&spi->dev);
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return 0;
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}
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static const struct spi_device_id zpa2326_spi_ids[] = {
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{ "zpa2326", 0 },
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{ },
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};
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MODULE_DEVICE_TABLE(spi, zpa2326_spi_ids);
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#if defined(CONFIG_OF)
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static const struct of_device_id zpa2326_spi_matches[] = {
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{ .compatible = "murata,zpa2326" },
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{ }
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};
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MODULE_DEVICE_TABLE(of, zpa2326_spi_matches);
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#endif
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static struct spi_driver zpa2326_spi_driver = {
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.driver = {
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.name = "zpa2326-spi",
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.of_match_table = of_match_ptr(zpa2326_spi_matches),
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.pm = ZPA2326_PM_OPS,
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},
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.probe = zpa2326_probe_spi,
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.remove = zpa2326_remove_spi,
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.id_table = zpa2326_spi_ids,
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};
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module_spi_driver(zpa2326_spi_driver);
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MODULE_AUTHOR("Gregor Boirie <gregor.boirie@parrot.com>");
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MODULE_DESCRIPTION("SPI driver for Murata ZPA2326 pressure sensor");
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MODULE_LICENSE("GPL v2");
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