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Message-ID: <20140729200126.GB34989@core.coreip.homeip.net>
Date: Tue, 29 Jul 2014 13:01:26 -0700
From: Dmitry Torokhov <dmitry.torokhov@...il.com>
To: Dan Murphy <dmurphy@...com>
Cc: linux-input@...r.kernel.org, linux-kernel@...r.kernel.org,
devicetree@...r.kernel.org, mark.rutland@....com,
madcatxster@...oid-pointer.net, simon@...gewell.org,
elias.vds@...il.com
Subject: Re: [Patch v3] input: drv260x: Add TI drv260x haptics driver
On Tue, Jul 29, 2014 at 02:32:27PM -0500, Dan Murphy wrote:
> Add the TI drv260x haptics/vibrator driver.
> This device uses the input force feedback
> to produce a wave form to driver an
> ERM or LRA actuator device.
>
> The initial driver supports the devices
> real time playback mode. But the device
> has additional wave patterns in ROM.
>
> This functionality will be added in
> future patchsets.
>
> Product data sheet is located here:
> http://www.ti.com/product/drv2605
>
> Signed-off-by: Dan Murphy <dmurphy@...com>
> ---
>
> v3 - Updated binding doc, changed to memless device, updated input alloc to
> devm, removed mutex locking, add sanity checks for mode and library - https://patchwork.kernel.org/patch/4635421/
> v2 - Fixed binding doc and patch headline - https://patchwork.kernel.org/patch/4619641/
>
> .../devicetree/bindings/input/ti,drv260x.txt | 50 ++
> drivers/input/misc/Kconfig | 9 +
> drivers/input/misc/Makefile | 1 +
> drivers/input/misc/drv260x.c | 515 ++++++++++++++++++++
> include/dt-bindings/input/ti-drv260x.h | 30 ++
> include/linux/input/drv260x.h | 181 +++++++
> 6 files changed, 786 insertions(+)
> create mode 100644 Documentation/devicetree/bindings/input/ti,drv260x.txt
> create mode 100644 drivers/input/misc/drv260x.c
> create mode 100644 include/dt-bindings/input/ti-drv260x.h
> create mode 100644 include/linux/input/drv260x.h
>
> diff --git a/Documentation/devicetree/bindings/input/ti,drv260x.txt b/Documentation/devicetree/bindings/input/ti,drv260x.txt
> new file mode 100644
> index 0000000..8e6970d
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/input/ti,drv260x.txt
> @@ -0,0 +1,50 @@
> +Texas Instruments - drv260x Haptics driver family
> +
> +The drv260x family serial control bus communicates through I2C protocols
> +
> +Required properties:
> + - compatible - One of:
> + "ti,drv2604" - DRV2604
> + "ti,drv2605" - DRV2605
> + "ti,drv2605l" - DRV2605L
> + - reg - I2C slave address
> + - supply- Required supply regulators are:
> + "vbat" - battery voltage
> + - mode - Power up mode of the chip (defined in include/dt-bindings/input/ti-drv260x.h)
> + DRV260X_LRA_MODE - Linear Resonance Actuator mode (Piezoelectric)
> + DRV260X_LRA_NO_CAL_MODE - This is a LRA Mode but there is no calibration
> + sequence during init. And the device is configured for real
> + time playback mode (RTP mode).
> + DRV260X_ERM_MODE - Eccentric Rotating Mass mode (Rotary vibrator)
> + - library-sel - These are ROM based waveforms pre-programmed into the IC.
> + This should be set to set the library to use at power up.
> + (defined in include/dt-bindings/input/ti-drv260x.h)
> + DRV260X_LIB_A - Pre-programmed Library
> + DRV260X_LIB_B - Pre-programmed Library
> + DRV260X_LIB_C - Pre-programmed Library
> + DRV260X_LIB_D - Pre-programmed Library
> + DRV260X_LIB_E - Pre-programmed Library
> + DRV260X_LIB_F - Pre-programmed Library
> +
> +Optional properties:
> + - enable-gpio - gpio pin to enable/disable the device.
> + - vib_rated_voltage - The rated voltage of the actuator in millivolts.
> + If this is not set then the value will be defaulted to
> + 3.2 v.
> + - vib_overdrive_voltage - The overdrive voltage of the actuator in millivolts.
> + If this is not set then the value will be defaulted to
> + 3.2 v.
> +Example:
> +
> +drv2605l: drv2605l@5a {
> + compatible = "ti,drv2605l";
> + reg = <0x5a>;
> + enable-gpio = <&gpio1 28 GPIO_ACTIVE_HIGH>;
> + mode = <DRV260X_LRA_MODE>;
> + library-sel = <DRV260X_LIB_SEL_DEFAULT>;
> + vib-rated-voltage = <3200>;
> + vib-overdriver-voltage = <3200>;
> +};
> +
> +For more product information please see the link below:
> +http://www.ti.com/product/drv2605
> diff --git a/drivers/input/misc/Kconfig b/drivers/input/misc/Kconfig
> index 2ff4425..99f6762 100644
> --- a/drivers/input/misc/Kconfig
> +++ b/drivers/input/misc/Kconfig
> @@ -676,4 +676,13 @@ config INPUT_SOC_BUTTON_ARRAY
> To compile this driver as a module, choose M here: the
> module will be called soc_button_array.
>
> +config INPUT_DRV260X_HAPTICS
> + tristate "TI DRV260X haptics support"
> + depends on INPUT && I2C
> + help
> + Say Y to enable support for the TI DRV260X haptics driver.
> +
> + To compile this driver as a module, choose M here: the
> + module will be called drv260x-haptics.
> +
> endif
> diff --git a/drivers/input/misc/Makefile b/drivers/input/misc/Makefile
> index 4955ad3..d8ef3c7 100644
> --- a/drivers/input/misc/Makefile
> +++ b/drivers/input/misc/Makefile
> @@ -64,3 +64,4 @@ obj-$(CONFIG_INPUT_WM831X_ON) += wm831x-on.o
> obj-$(CONFIG_INPUT_XEN_KBDDEV_FRONTEND) += xen-kbdfront.o
> obj-$(CONFIG_INPUT_YEALINK) += yealink.o
> obj-$(CONFIG_INPUT_IDEAPAD_SLIDEBAR) += ideapad_slidebar.o
> +obj-$(CONFIG_INPUT_DRV260X_HAPTICS) += drv260x.o
> diff --git a/drivers/input/misc/drv260x.c b/drivers/input/misc/drv260x.c
> new file mode 100644
> index 0000000..edf75a2
> --- /dev/null
> +++ b/drivers/input/misc/drv260x.c
> @@ -0,0 +1,515 @@
> +/*
> + * drv260x.c - DRV260X haptics driver family
> + *
> + * Author: Dan Murphy <dmurphy@...com>
> + *
> + * Copyright: (C) 2014 Texas Instruments, Inc.
> + *
> + * This program is free software; you can redistribute it and/or modify
> + * it under the terms of the GNU General Public License version 2 as
> + * published by the Free Software Foundation.
> + *
> + * This program is distributed in the hope that it will be useful, but
> + * WITHOUT ANY WARRANTY; without even the implied warranty of
> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
> + * General Public License for more details.
> + */
> +
> +#include <linux/i2c.h>
> +#include <linux/input.h>
> +#include <linux/module.h>
> +#include <linux/of_gpio.h>
> +#include <linux/platform_device.h>
> +#include <linux/regmap.h>
> +#include <linux/slab.h>
> +#include <linux/delay.h>
> +#include <linux/regulator/consumer.h>
> +
> +#include <linux/input/drv260x.h>
> +#include <dt-bindings/input/ti-drv260x.h>
> +
> +/**
> + * struct drv260x_data -
> + * @input_dev - Pointer to the input device
> + * @client - Pointer to the I2C client
> + * @regmap - Register map of the device
> + * @work - Work item used to off load the enable/disable of the vibration
> + * @enable_gpio - Pointer to the gpio used for enable/disabling
> + * @regulator - Pointer to the regulator for the IC
> + * @magnitude - Magnitude of the vibration event
> + * @mode - The operating mode of the IC (LRA_NO_CAL, ERM or LRA)
> + * @library - The vibration library to be used
> + * @rated_voltage - The rated_voltage of the actuator
> + * @overdriver_voltage - The over drive voltage of the actuator
> +**/
> +struct drv260x_data {
> + struct input_dev *input_dev;
> + struct i2c_client *client;
> + struct regmap *regmap;
> + struct work_struct work;
> + struct gpio_desc *enable_gpio;
> + struct regulator *regulator;
> + u32 magnitude;
> + u32 mode;
> + u32 library;
> + int rated_voltage;
> + int overdrive_voltage;
> +};
> +
> +static struct reg_default drv260x_reg_defs[] = {
> + { DRV260X_STATUS, 0xe0 },
> + { DRV260X_MODE, 0x40 },
> + { DRV260X_RT_PB_IN, 0x00},
> + { DRV260X_LIB_SEL, 0x00},
> + { DRV260X_WV_SEQ_1, 0x01},
> + { DRV260X_WV_SEQ_2, 0x00},
> + { DRV260X_WV_SEQ_3, 0x00},
> + { DRV260X_WV_SEQ_4, 0x00},
> + { DRV260X_WV_SEQ_5, 0x00},
> + { DRV260X_WV_SEQ_6, 0x00},
> + { DRV260X_WV_SEQ_7, 0x00},
> + { DRV260X_WV_SEQ_8, 0x00},
> + { DRV260X_GO, 0x00},
> + { DRV260X_OVERDRIVE_OFF, 0x00},
> + { DRV260X_SUSTAIN_P_OFF, 0x00},
> + { DRV260X_SUSTAIN_N_OFF, 0x00},
> + { DRV260X_BRAKE_OFF , 0x00},
> + { DRV260X_A_TO_V_CTRL , 0x05},
> + { DRV260X_A_TO_V_MIN_INPUT, 0x19},
> + { DRV260X_A_TO_V_MAX_INPUT, 0xff},
> + { DRV260X_A_TO_V_MIN_OUT, 0x19},
> + { DRV260X_A_TO_V_MAX_OUT, 0xff},
> + { DRV260X_RATED_VOLT, 0x3e},
> + { DRV260X_OD_CLAMP_VOLT, 0x8c},
> + { DRV260X_CAL_COMP, 0x0c},
> + { DRV260X_CAL_BACK_EMF, 0x6c},
> + { DRV260X_FEEDBACK_CTRL, 0x36},
> + { DRV260X_CTRL1, 0x93},
> + { DRV260X_CTRL2, 0xfa},
> + { DRV260X_CTRL3, 0xa0},
> + { DRV260X_CTRL4, 0x20},
> + { DRV260X_CTRL5, 0x80},
> + { DRV260X_LRA_LOOP_PERIOD, 0x33},
> + { DRV260X_VBAT_MON, 0x00},
> + { DRV260X_LRA_RES_PERIOD, 0x00},
> +};
> +
> +/**
> + * Rated and Overdriver Voltages:
> + * Calculated using the formula r = v * 255 / 5.6
> + * where r is what will be written to the register
> + * and v is the rated or overdriver voltage of the actuator
> + **/
> +#define DRV260X_DEF_RATED_VOLT 0x90
> +#define DRV260X_DEF_OD_CLAMP_VOLT 0x90
> +
> +static int drv260x_calculate_voltage(int voltage)
> +{
> + return (voltage * 255 / 5600);
> +}
> +
> +static void drv260x_worker(struct work_struct *work)
> +{
> + struct drv260x_data *haptics = container_of(work, struct drv260x_data, work);
> +
> + regmap_write(haptics->regmap, DRV260X_RT_PB_IN, haptics->magnitude);
Error handling.
> +
> +}
> +
> +static int drv260x_haptics_play(struct input_dev *input, void *data,
> + struct ff_effect *effect)
> +{
> + struct drv260x_data *haptics = input_get_drvdata(input);
> + int ret;
> +
> + gpiod_set_value(haptics->enable_gpio, 1);
Error handling please. Also, is it possible that chip would need sleep
to control gpio?
> + /* Data sheet says to wait 250us before trying to communicate */
> + udelay(250);
> +
> + ret = regmap_write(haptics->regmap, DRV260X_MODE, DRV260X_RT_PLAYBACK);
> + if (ret != 0) {
> + dev_err(&haptics->client->dev,
> + "Failed to write set mode: %d\n",
> + ret);
> + return ret;
> + }
Does it actually work? The playback handler is running with interrupts
disabled so I2C transfers are forbidden. I think you need to move all
this stuff in workqueue handler.
> +
> + haptics->mode = DRV260X_LRA_NO_CAL_MODE;
> + haptics->magnitude = 0;
> +
> + if (effect->u.rumble.strong_magnitude ||
> + effect->u.rumble.weak_magnitude) {
> + if (effect->u.rumble.strong_magnitude > 0)
> + haptics->magnitude = effect->u.rumble.strong_magnitude;
> + else if (effect->u.rumble.weak_magnitude > 0)
> + haptics->magnitude = effect->u.rumble.weak_magnitude;
> + }
> +
> + schedule_work(&haptics->work);
Hm, can you please tell be why exactly you split off just one regmap
access into a separate work item?
> +
> + return 0;
> +}
> +
> +static void drv260x_close(struct input_dev *input)
> +{
> + struct drv260x_data *haptics = input_get_drvdata(input);
> +
> + cancel_work_sync(&haptics->work);
> + regmap_write(haptics->regmap, DRV260X_MODE, DRV260X_STANDBY);
Error handling.
> + gpiod_set_value(haptics->enable_gpio, 0);
> +}
> +
> +static const struct reg_default drv260x_lra_cal_regs[] = {
> + { DRV260X_MODE, DRV260X_AUTO_CAL },
> + { DRV260X_CTRL3, DRV260X_NG_THRESH_2},
> + { DRV260X_FEEDBACK_CTRL, DRV260X_FB_REG_LRA_MODE | DRV260X_BRAKE_FACTOR_4X | DRV260X_LOOP_GAIN_HIGH },
> +};
> +
> +static const struct reg_default drv260x_lra_init_regs[] = {
> + { DRV260X_MODE, DRV260X_RT_PLAYBACK},
> + { DRV260X_A_TO_V_CTRL, DRV260X_AUDIO_HAPTICS_PEAK_20MS | DRV260X_AUDIO_HAPTICS_FILTER_125HZ},
> + { DRV260X_A_TO_V_MIN_INPUT, DRV260X_AUDIO_HAPTICS_MIN_IN_VOLT },
> + { DRV260X_A_TO_V_MAX_INPUT, DRV260X_AUDIO_HAPTICS_MAX_IN_VOLT },
> + { DRV260X_A_TO_V_MIN_OUT, DRV260X_AUDIO_HAPTICS_MIN_OUT_VOLT },
> + { DRV260X_A_TO_V_MAX_OUT, DRV260X_AUDIO_HAPTICS_MAX_OUT_VOLT },
> + { DRV260X_FEEDBACK_CTRL, DRV260X_FB_REG_LRA_MODE | DRV260X_BRAKE_FACTOR_2X | DRV260X_LOOP_GAIN_MED | DRV260X_BEMF_GAIN_3 },
> + { DRV260X_CTRL1, DRV260X_STARTUP_BOOST },
> + { DRV260X_CTRL2, DRV260X_SAMP_TIME_250 },
> + { DRV260X_CTRL3, DRV260X_NG_THRESH_2 | DRV260X_ANANLOG_IN },
> + { DRV260X_CTRL4, DRV260X_AUTOCAL_TIME_500MS },
> +};
> +
> +static const struct reg_default drv260x_erm_cal_regs[] = {
> + { DRV260X_MODE, DRV260X_AUTO_CAL },
> + { DRV260X_A_TO_V_MIN_INPUT, DRV260X_AUDIO_HAPTICS_MIN_IN_VOLT },
> + { DRV260X_A_TO_V_MAX_INPUT, DRV260X_AUDIO_HAPTICS_MAX_IN_VOLT },
> + { DRV260X_A_TO_V_MIN_OUT, DRV260X_AUDIO_HAPTICS_MIN_OUT_VOLT },
> + { DRV260X_A_TO_V_MAX_OUT, DRV260X_AUDIO_HAPTICS_MAX_OUT_VOLT },
> + { DRV260X_FEEDBACK_CTRL, DRV260X_BRAKE_FACTOR_3X | DRV260X_LOOP_GAIN_MED | DRV260X_BEMF_GAIN_2 },
> + { DRV260X_CTRL1, DRV260X_STARTUP_BOOST },
> + { DRV260X_CTRL2, DRV260X_SAMP_TIME_250 | DRV260X_BLANK_TIME_75 | DRV260X_SAMP_TIME_250 | DRV260X_IDISS_TIME_75 },
> + { DRV260X_CTRL3, DRV260X_NG_THRESH_2 | DRV260X_ERM_OPEN_LOOP },
> + { DRV260X_CTRL4, DRV260X_AUTOCAL_TIME_500MS },
> +};
> +
> +static int drv260x_init(struct drv260x_data *haptics)
> +{
> + int ret;
> + unsigned int cal_buf;
> +
> + ret = regmap_write(haptics->regmap,
> + DRV260X_RATED_VOLT, haptics->rated_voltage);
> + if (ret != 0)
> + goto write_failure;
> +
> + ret = regmap_write(haptics->regmap,
> + DRV260X_OD_CLAMP_VOLT, haptics->overdrive_voltage);
> + if (ret != 0)
> + goto write_failure;
> +
> + if (haptics->mode == DRV260X_LRA_MODE) {
> + ret = regmap_register_patch(haptics->regmap,
> + drv260x_lra_cal_regs,
> + ARRAY_SIZE(drv260x_lra_cal_regs));
> + if (ret != 0)
> + goto write_failure;
> +
> + } else if (haptics->mode == DRV260X_ERM_MODE) {
> + ret = regmap_register_patch(haptics->regmap,
> + drv260x_erm_cal_regs,
> + ARRAY_SIZE(drv260x_erm_cal_regs));
> + if (ret != 0)
> + goto write_failure;
> +
> + ret = regmap_update_bits(haptics->regmap, DRV260X_LIB_SEL,
> + DRV260X_LIB_SEL_MASK,
> + haptics->library);
> + if (ret != 0)
> + goto write_failure;
> +
> + } else {
> + ret = regmap_register_patch(haptics->regmap,
> + drv260x_lra_init_regs,
> + ARRAY_SIZE(drv260x_lra_init_regs));
> + if (ret != 0)
> + goto write_failure;
> +
> + ret = regmap_update_bits(haptics->regmap, DRV260X_LIB_SEL,
> + DRV260X_LIB_SEL_MASK,
> + haptics->library);
> + if (ret != 0)
> + goto write_failure;
> +
> + goto skip_go_bit;
> + }
switch (haptics->mode) {
case DRV260X_LRA_MODE:
...
}
> +
> + if (ret != 0) {
> + dev_err(&haptics->client->dev,
> + "Failed to write init registers: %d\n",
> + ret);
> + goto write_failure;
> + }
> +
> + ret = regmap_write(haptics->regmap, DRV260X_GO, DRV260X_GO_BIT);
> + if (ret != 0)
> + goto write_failure;
> +
> + do {
> + ret = regmap_read(haptics->regmap, DRV260X_GO, &cal_buf);
> + if (ret != 0)
> + goto write_failure;
> + } while (cal_buf == DRV260X_GO_BIT || ret != 0);
> +
> + return ret;
> +
> +write_failure:
> + dev_err(&haptics->client->dev,
> + "Failed to write init registers: %d\n",
> + ret);
> +skip_go_bit:
> + return ret;
> +}
> +
> +static const struct regmap_config drv260x_regmap_config = {
> + .reg_bits = 8,
> + .val_bits = 8,
> +
> + .max_register = DRV260X_MAX_REG,
> + .reg_defaults = drv260x_reg_defs,
> + .num_reg_defaults = ARRAY_SIZE(drv260x_reg_defs),
> + .cache_type = REGCACHE_NONE,
> +};
> +
> +static int drv260x_probe(struct i2c_client *client,
> + const struct i2c_device_id *id)
> +{
> + struct drv260x_data *haptics;
> + struct device_node *np = client->dev.of_node;
> + struct drv260x_platform_data *pdata = client->dev.platform_data;
const struct drv260x_platform_data *pdata =
dev_get_platdata(&client->dev);
> + int ret;
> + int voltage;
> +
> + haptics = devm_kzalloc(&client->dev, sizeof(*haptics), GFP_KERNEL);
> + if (!haptics)
> + return -ENOMEM;
> +
> + haptics->rated_voltage = DRV260X_DEF_OD_CLAMP_VOLT;
> + haptics->rated_voltage = DRV260X_DEF_RATED_VOLT;
> +
> + if (np) {
> + ret = of_property_read_u32(np, "mode", &haptics->mode);
> + if (ret < 0) {
> + dev_err(&client->dev,
> + "%s: No entry for mode\n", __func__);
> +
> + return ret;
> + }
> + ret = of_property_read_u32(np, "library-sel",
> + &haptics->library);
> + if (ret < 0) {
> + dev_err(&client->dev,
> + "%s: No entry for library selection\n",
> + __func__);
> +
> + return ret;
> + }
> + ret = of_property_read_u32(np, "vib-rated-voltage",
> + &voltage);
> + if (!ret)
> + haptics->rated_voltage = drv260x_calculate_voltage(voltage);
> +
> +
> + ret = of_property_read_u32(np, "vib-overdrive-voltage",
> + &voltage);
> + if (!ret)
> + haptics->overdrive_voltage = drv260x_calculate_voltage(voltage);
> +
That should probably be split into a separate functionand guarded by
CONFIG_OF.
> + } else if (pdata) {
Platform data, if supplied, should take precedence.
> + haptics->mode = pdata->mode;
> + haptics->library = pdata->library_selection;
> + if (pdata->vib_overdrive_voltage)
> + haptics->overdrive_voltage = drv260x_calculate_voltage(pdata->vib_overdrive_voltage);
> + if (pdata->vib_rated_voltage)
> + haptics->rated_voltage = drv260x_calculate_voltage(pdata->vib_rated_voltage);
> + } else {
> + dev_err(&client->dev, "Platform data not set\n");
> + return -ENODEV;
> + }
> +
> +
> + if (haptics->mode < DRV260X_LRA_MODE ||
> + haptics->mode > DRV260X_ERM_MODE) {
> + dev_err(&client->dev,
> + "Mode value is invalid: %i using default RTP mode\n",
> + haptics->mode);
> + return -EINVAL;
The message is misleading: it does not use the default mode, it aborts.
> + }
> +
> + if (haptics->library < DRV260X_LIB_SEL_DEFAULT ||
> + haptics->library > DRV260X_LIB_F) {
> + dev_err(&client->dev,
> + "Library value is invalid: %i\n", haptics->library);
> + return -EINVAL;
> + }
> +
> + haptics->regulator = regulator_get(&client->dev, "vbat");
devm_regulator_get()
> + if (IS_ERR(haptics->regulator)) {
> + ret = PTR_ERR(haptics->regulator);
> + dev_err(&client->dev,
> + "unable to get regulator, error: %d\n", ret);
> + goto err_regulator;
> + }
> +
> + haptics->enable_gpio = devm_gpiod_get(&client->dev, "enable");
> + if (IS_ERR(haptics->enable_gpio)) {
> + ret = PTR_ERR(haptics->enable_gpio);
> + if (ret != -ENOENT && ret != -ENOSYS)
> + goto err_gpio;
> +
> + haptics->enable_gpio = NULL;
> + } else {
> + gpiod_direction_output(haptics->enable_gpio, 1);
> + }
> +
> + haptics->input_dev = devm_input_allocate_device(&client->dev);
> + if (haptics->input_dev == NULL) {
> + dev_err(&client->dev, "Failed to allocate input device\n");
> + ret = -ENOMEM;
> + goto err_input_alloc;
> + }
> +
> + haptics->input_dev->name = "drv260x:haptics";
> + haptics->input_dev->dev.parent = client->dev.parent;
> + haptics->input_dev->close = drv260x_close;
> + input_set_drvdata(haptics->input_dev, haptics);
> + input_set_capability(haptics->input_dev, EV_FF, FF_RUMBLE);
> +
> + ret = input_ff_create_memless(haptics->input_dev, NULL,
> + drv260x_haptics_play);
> + if (ret < 0) {
> + dev_err(&client->dev, "input_ff_create() failed: %d\n",
> + ret);
> + goto err_ff_create;
> + }
> +
> + INIT_WORK(&haptics->work, drv260x_worker);
> +
> + haptics->client = client;
> + i2c_set_clientdata(client, haptics);
> +
> + haptics->regmap = devm_regmap_init_i2c(client, &drv260x_regmap_config);
> + if (IS_ERR(haptics->regmap)) {
> + ret = PTR_ERR(haptics->regmap);
> + dev_err(&client->dev, "Failed to allocate register map: %d\n",
> + ret);
> + goto err_regmap;
> + }
> +
> + drv260x_init(haptics);
> +
> + ret = input_register_device(haptics->input_dev);
> + if (ret < 0) {
> + dev_err(&client->dev, "couldn't register input device: %d\n",
> + ret);
> + goto err_iff;
> + }
> + return 0;
> +
> +err_iff:
> +err_regmap:
> + if (haptics->input_dev)
> + input_ff_destroy(haptics->input_dev);
Is not really needed with devm.
> +err_ff_create:
> +err_input_alloc:
> +err_gpio:
> + regulator_put(haptics->regulator);
> +err_regulator:
> + return ret;
> +}
> +
> +static int drv260x_remove(struct i2c_client *client)
> +{
> + struct drv260x_data *haptics = i2c_get_clientdata(client);
> +
> + cancel_work_sync(&haptics->work);
> +
> + regmap_write(haptics->regmap, DRV260X_MODE, DRV260X_STANDBY);
> + gpiod_set_value(haptics->enable_gpio, 0);
This is already done in ->close() so not needed here.
> +
> + input_unregister_device(haptics->input_dev);
Not nedded with devm.
> + regulator_put(haptics->regulator);
Should go away if you use devm_regulator_get().
> +
> + return 0;
> +}
> +
> +#ifdef CONFIG_PM_SLEEP
> +static int drv260x_suspend(struct device *dev)
> +{
> + struct drv260x_data *haptics = dev_get_drvdata(dev);
> +
> + regmap_update_bits(haptics->regmap,
> + DRV260X_MODE,
> + DRV260X_STANDBY_MASK,
> + DRV260X_STANDBY);
> + gpiod_set_value(haptics->enable_gpio, 0);
> +
> + regulator_disable(haptics->regulator);
> +
> + return 0;
> +}
> +
> +static int drv260x_resume(struct device *dev)
> +{
> + struct drv260x_data *haptics = dev_get_drvdata(dev);
> + int ret;
> +
> + ret = regulator_enable(haptics->regulator);
> + if (ret) {
> + dev_err(dev, "Failed to enable regulator\n");
> + return ret;
> + }
> + regmap_update_bits(haptics->regmap,
> + DRV260X_MODE,
> + DRV260X_STANDBY_MASK, 0);
> +
> + gpiod_set_value(haptics->enable_gpio, 1);
Should take input->mutex and check input->users to not enable device if
there are no users.
> +
> + return 0;
> +}
> +#endif
> +
> +static SIMPLE_DEV_PM_OPS(drv260x_pm_ops, drv260x_suspend, drv260x_resume);
> +
> +static const struct i2c_device_id drv260x_id[] = {
> + { "drv2605l", 0 },
> + { }
> +};
> +MODULE_DEVICE_TABLE(i2c, drv260x_id);
> +
> +#if IS_ENABLED(CONFIG_OF)
> +static const struct of_device_id drv260x_of_match[] = {
> + { .compatible = "ti,drv2604", },
> + { .compatible = "ti,drv2605", },
> + { .compatible = "ti,drv2605l", },
> + {}
> +};
> +MODULE_DEVICE_TABLE(of, drv260x_of_match);
> +#endif
> +
> +static struct i2c_driver drv260x_driver = {
> + .probe = drv260x_probe,
> + .remove = drv260x_remove,
> + .driver = {
> + .name = "drv260x-haptics",
> + .owner = THIS_MODULE,
> + .of_match_table = of_match_ptr(drv260x_of_match),
> + .pm = &drv260x_pm_ops,
> + },
> + .id_table = drv260x_id,
> +};
> +module_i2c_driver(drv260x_driver);
> +
> +MODULE_ALIAS("platform:drv260x-haptics");
> +MODULE_DESCRIPTION("TI DRV260x haptics driver");
> +MODULE_LICENSE("GPL");
> +MODULE_AUTHOR("Dan Murphy <dmurphy@...com>");
> diff --git a/include/dt-bindings/input/ti-drv260x.h b/include/dt-bindings/input/ti-drv260x.h
> new file mode 100644
> index 0000000..3843b9a
> --- /dev/null
> +++ b/include/dt-bindings/input/ti-drv260x.h
> @@ -0,0 +1,30 @@
> +/*
> + * ti-drv260x.h - DRV260X haptics driver family
Please no file name sin comments - if you rename you'll have to fix it
here as well.
> + *
> + * Author: Dan Murphy <dmurphy@...com>
> + *
> + * Copyright: (C) 2014 Texas Instruments, Inc.
> + *
> + * This program is free software; you can redistribute it and/or modify
> + * it under the terms of the GNU General Public License version 2 as
> + * published by the Free Software Foundation.
> + *
> + * This program is distributed in the hope that it will be useful, but
> + * WITHOUT ANY WARRANTY; without even the implied warranty of
> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
> + * General Public License for more details.
> + */
> +
> +/* Calibration Types */
> +#define DRV260X_LRA_MODE 0x00
> +#define DRV260X_LRA_NO_CAL_MODE 0x01
> +#define DRV260X_ERM_MODE 0x02
> +
> +/* Library Selection */
> +#define DRV260X_LIB_SEL_DEFAULT 0x00
> +#define DRV260X_LIB_A 0x01
> +#define DRV260X_LIB_B 0x02
> +#define DRV260X_LIB_C 0x03
> +#define DRV260X_LIB_D 0x04
> +#define DRV260X_LIB_E 0x05
> +#define DRV260X_LIB_F 0x06
> diff --git a/include/linux/input/drv260x.h b/include/linux/input/drv260x.h
> new file mode 100644
> index 0000000..709395e
> --- /dev/null
> +++ b/include/linux/input/drv260x.h
Wonder if it should go into platform data directory.
> @@ -0,0 +1,181 @@
> +/*
> + * drv260x.h - DRV260X haptics driver family
> + *
> + * Author: Dan Murphy <dmurphy@...com>
> + *
> + * Copyright: (C) 2014 Texas Instruments, Inc.
> + *
> + * This program is free software; you can redistribute it and/or modify
> + * it under the terms of the GNU General Public License version 2 as
> + * published by the Free Software Foundation.
> + *
> + * This program is distributed in the hope that it will be useful, but
> + * WITHOUT ANY WARRANTY; without even the implied warranty of
> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
> + * General Public License for more details.
> + */
> +
> +#ifndef _LINUX_DRV260X_I2C_H
> +#define _LINUX_DRV260X_I2C_H
> +
> +#define DRV260X_STATUS 0x0
> +#define DRV260X_MODE 0x1
> +#define DRV260X_RT_PB_IN 0x2
> +#define DRV260X_LIB_SEL 0x3
> +#define DRV260X_WV_SEQ_1 0x4
> +#define DRV260X_WV_SEQ_2 0x5
> +#define DRV260X_WV_SEQ_3 0x6
> +#define DRV260X_WV_SEQ_4 0x7
> +#define DRV260X_WV_SEQ_5 0x8
> +#define DRV260X_WV_SEQ_6 0x9
> +#define DRV260X_WV_SEQ_7 0xa
> +#define DRV260X_WV_SEQ_8 0xb
> +#define DRV260X_GO 0xc
> +#define DRV260X_OVERDRIVE_OFF 0xd
> +#define DRV260X_SUSTAIN_P_OFF 0xe
> +#define DRV260X_SUSTAIN_N_OFF 0xf
> +#define DRV260X_BRAKE_OFF 0x10
> +#define DRV260X_A_TO_V_CTRL 0x11
> +#define DRV260X_A_TO_V_MIN_INPUT 0x12
> +#define DRV260X_A_TO_V_MAX_INPUT 0x13
> +#define DRV260X_A_TO_V_MIN_OUT 0x14
> +#define DRV260X_A_TO_V_MAX_OUT 0x15
> +#define DRV260X_RATED_VOLT 0x16
> +#define DRV260X_OD_CLAMP_VOLT 0x17
> +#define DRV260X_CAL_COMP 0x18
> +#define DRV260X_CAL_BACK_EMF 0x19
> +#define DRV260X_FEEDBACK_CTRL 0x1a
> +#define DRV260X_CTRL1 0x1b
> +#define DRV260X_CTRL2 0x1c
> +#define DRV260X_CTRL3 0x1d
> +#define DRV260X_CTRL4 0x1e
> +#define DRV260X_CTRL5 0x1f
> +#define DRV260X_LRA_LOOP_PERIOD 0x20
> +#define DRV260X_VBAT_MON 0x21
> +#define DRV260X_LRA_RES_PERIOD 0x22
> +#define DRV260X_MAX_REG 0x23
> +
> +#define DRV260X_ALLOWED_R_BYTES 25
> +#define DRV260X_ALLOWED_W_BYTES 2
> +#define DRV260X_MAX_RW_RETRIES 5
> +#define DRV260X_I2C_RETRY_DELAY 10
> +
> +#define DRV260X_GO_BIT 0x01
> +
> +/* Library Selection */
> +#define DRV260X_LIB_SEL_MASK 0x07
> +#define DRV260X_LIB_SEL_RAM 0x0
> +#define DRV260X_LIB_SEL_OD 0x1
> +#define DRV260X_LIB_SEL_40_60 0x2
> +#define DRV260X_LIB_SEL_60_80 0x3
> +#define DRV260X_LIB_SEL_100_140 0x4
> +#define DRV260X_LIB_SEL_140_PLUS 0x5
> +
> +#define DRV260X_LIB_SEL_HIZ_MASK 0x10
> +#define DRV260X_LIB_SEL_HIZ_EN 0x01
> +#define DRV260X_LIB_SEL_HIZ_DIS 0
> +
> +/* Mode register */
> +#define DRV260X_STANDBY (1 << 6)
> +#define DRV260X_STANDBY_MASK 0x40
> +#define DRV260X_INTERNAL_TRIGGER 0x00
> +#define DRV260X_EXT_TRIGGER_EDGE 0x01
> +#define DRV260X_EXT_TRIGGER_LEVEL 0x02
> +#define DRV260X_PWM_ANALOG_IN 0x03
> +#define DRV260X_AUDIOHAPTIC 0x04
> +#define DRV260X_RT_PLAYBACK 0x05
> +#define DRV260X_DIAGNOSTICS 0x06
> +#define DRV260X_AUTO_CAL 0x07
> +
> +/* Audio to Haptics Control */
> +#define DRV260X_AUDIO_HAPTICS_PEAK_10MS (0 << 2)
> +#define DRV260X_AUDIO_HAPTICS_PEAK_20MS (1 << 2)
> +#define DRV260X_AUDIO_HAPTICS_PEAK_30MS (2 << 2)
> +#define DRV260X_AUDIO_HAPTICS_PEAK_40MS (3 << 2)
> +
> +#define DRV260X_AUDIO_HAPTICS_FILTER_100HZ 0x00
> +#define DRV260X_AUDIO_HAPTICS_FILTER_125HZ 0x01
> +#define DRV260X_AUDIO_HAPTICS_FILTER_150HZ 0x02
> +#define DRV260X_AUDIO_HAPTICS_FILTER_200HZ 0x03
> +
> +/* Min/Max Input/Output Voltages */
> +#define DRV260X_AUDIO_HAPTICS_MIN_IN_VOLT 0x19
> +#define DRV260X_AUDIO_HAPTICS_MAX_IN_VOLT 0x64
> +#define DRV260X_AUDIO_HAPTICS_MIN_OUT_VOLT 0x19
> +#define DRV260X_AUDIO_HAPTICS_MAX_OUT_VOLT 0xFF
> +
> +/* Feedback register */
> +#define DRV260X_FB_REG_ERM_MODE 0x7f
> +#define DRV260X_FB_REG_LRA_MODE (1 << 7)
> +
> +#define DRV260X_BRAKE_FACTOR_MASK 0x1f
> +#define DRV260X_BRAKE_FACTOR_2X (1 << 0)
> +#define DRV260X_BRAKE_FACTOR_3X (2 << 4)
> +#define DRV260X_BRAKE_FACTOR_4X (3 << 4)
> +#define DRV260X_BRAKE_FACTOR_6X (4 << 4)
> +#define DRV260X_BRAKE_FACTOR_8X (5 << 4)
> +#define DRV260X_BRAKE_FACTOR_16 (6 << 4)
> +#define DRV260X_BRAKE_FACTOR_DIS (7 << 4)
> +
> +#define DRV260X_LOOP_GAIN_LOW 0xf3
> +#define DRV260X_LOOP_GAIN_MED (1 << 2)
> +#define DRV260X_LOOP_GAIN_HIGH (2 << 2)
> +#define DRV260X_LOOP_GAIN_VERY_HIGH (3 << 2)
> +
> +#define DRV260X_BEMF_GAIN_0 0xfc
> +#define DRV260X_BEMF_GAIN_1 (1 << 0)
> +#define DRV260X_BEMF_GAIN_2 (2 << 0)
> +#define DRV260X_BEMF_GAIN_3 (3 << 0)
> +
> +/* Control 1 register */
> +#define DRV260X_AC_CPLE_EN (1 << 5)
> +#define DRV260X_STARTUP_BOOST (1 << 7)
> +
> +/* Control 2 register */
> +
> +#define DRV260X_IDISS_TIME_45 0
> +#define DRV260X_IDISS_TIME_75 (1 << 0)
> +#define DRV260X_IDISS_TIME_150 (1 << 1)
> +#define DRV260X_IDISS_TIME_225 0x03
> +
> +#define DRV260X_BLANK_TIME_45 (0 << 2)
> +#define DRV260X_BLANK_TIME_75 (1 << 2)
> +#define DRV260X_BLANK_TIME_150 (2 << 2)
> +#define DRV260X_BLANK_TIME_225 (3 << 2)
> +
> +#define DRV260X_SAMP_TIME_150 (0 << 4)
> +#define DRV260X_SAMP_TIME_200 (1 << 4)
> +#define DRV260X_SAMP_TIME_250 (2 << 4)
> +#define DRV260X_SAMP_TIME_300 (3 << 4)
> +
> +#define DRV260X_BRAKE_STABILIZER (1 << 6)
> +#define DRV260X_UNIDIR_IN (0 << 7)
> +#define DRV260X_BIDIR_IN (1 << 7)
> +
> +/* Control 3 Register */
> +#define DRV260X_LRA_OPEN_LOOP (1 << 0)
> +#define DRV260X_ANANLOG_IN (1 << 1)
> +#define DRV260X_LRA_DRV_MODE (1 << 2)
> +#define DRV260X_RTP_UNSIGNED_DATA (1 << 3)
> +#define DRV260X_SUPPLY_COMP_DIS (1 << 4)
> +#define DRV260X_ERM_OPEN_LOOP (1 << 5)
> +#define DRV260X_NG_THRESH_0 (0 << 6)
> +#define DRV260X_NG_THRESH_2 (1 << 6)
> +#define DRV260X_NG_THRESH_4 (2 << 6)
> +#define DRV260X_NG_THRESH_8 (3 << 6)
> +
> +/* Control 4 Register */
> +#define DRV260X_AUTOCAL_TIME_150MS (0 << 4)
> +#define DRV260X_AUTOCAL_TIME_250MS (1 << 4)
> +#define DRV260X_AUTOCAL_TIME_500MS (2 << 4)
> +#define DRV260X_AUTOCAL_TIME_1000MS (3 << 4)
> +
> +struct drv260x_platform_data {
> + int enable_gpio;
> + int library_selection;
> + int mode;
> + int vib_rated_voltage;
> + int vib_overdrive_voltage;
Should any of these be unsigned?
> +};
> +
> +#endif
> --
> 1.7.9.5
>
Thanks.
--
Dmitry
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