[RESEND,v8,2/2] media: dw9807: Add dw9807 vcm driver
Commit Message
From: Alan Chiang <alanx.chiang@intel.com>
DW9807 is a 10 bit DAC from Dongwoon, designed for linear
control of voice coil motor.
This driver creates a V4L2 subdevice and
provides control to set the desired focus.
Signed-off-by: Andy Yeh <andy.yeh@intel.com>
---
since v1:
- changed author.
since v2:
- addressed outstanding comments.
- enabled sequential write to update 2 registers in a single transaction.
since v3:
- addressed comments for v3.
- Remove redundant codes and declare some variables as constant variable.
- separate DT binding to another patch
since v4:
- sent patchset included DT binding with cover page
since v6:
- change the return code of i2c_check
- fix long cols exceed 80 chars
- remove #define DW9807_NAME since only used once
since v7:
- Remove some redundant type cast
- Modify to meet the coding style
- Replace a while loop by readx_poll_timeout function
- Return the i2c error directly.
MAINTAINERS | 7 +
drivers/media/i2c/Kconfig | 10 ++
drivers/media/i2c/Makefile | 1 +
drivers/media/i2c/dw9807.c | 329 +++++++++++++++++++++++++++++++++++++++++++++
4 files changed, 347 insertions(+)
create mode 100644 drivers/media/i2c/dw9807.c
Comments
Hi Andy,
On Wed, Apr 25, 2018 at 11:04 AM Andy Yeh <andy.yeh@intel.com> wrote:
> From: Alan Chiang <alanx.chiang@intel.com>
> DW9807 is a 10 bit DAC from Dongwoon, designed for linear
> control of voice coil motor.
> This driver creates a V4L2 subdevice and
> provides control to set the desired focus.
> Signed-off-by: Andy Yeh <andy.yeh@intel.com>
> ---
> since v1:
> - changed author.
> since v2:
> - addressed outstanding comments.
> - enabled sequential write to update 2 registers in a single transaction.
> since v3:
> - addressed comments for v3.
> - Remove redundant codes and declare some variables as constant variable.
> - separate DT binding to another patch
> since v4:
> - sent patchset included DT binding with cover page
> since v6:
> - change the return code of i2c_check
> - fix long cols exceed 80 chars
> - remove #define DW9807_NAME since only used once
> since v7:
> - Remove some redundant type cast
> - Modify to meet the coding style
> - Replace a while loop by readx_poll_timeout function
> - Return the i2c error directly
Reviewed-by: Tomasz Figa <tfiga@chromium.org>
Thanks for addressing the comments.
Best regards,
Tomasz
Hi Andy,
thanks for addressing comments on previous versions
On Wed, Apr 25, 2018 at 10:12:08AM +0800, Andy Yeh wrote:
> From: Alan Chiang <alanx.chiang@intel.com>
>
> DW9807 is a 10 bit DAC from Dongwoon, designed for linear
> control of voice coil motor.
>
> This driver creates a V4L2 subdevice and
> provides control to set the desired focus.
>
> Signed-off-by: Andy Yeh <andy.yeh@intel.com>
Reviewed-by: Jacopo Mondi <jacopo@jmondi.org>
Thanks
j
> ---
> since v1:
> - changed author.
> since v2:
> - addressed outstanding comments.
> - enabled sequential write to update 2 registers in a single transaction.
> since v3:
> - addressed comments for v3.
> - Remove redundant codes and declare some variables as constant variable.
> - separate DT binding to another patch
> since v4:
> - sent patchset included DT binding with cover page
> since v6:
> - change the return code of i2c_check
> - fix long cols exceed 80 chars
> - remove #define DW9807_NAME since only used once
> since v7:
> - Remove some redundant type cast
> - Modify to meet the coding style
> - Replace a while loop by readx_poll_timeout function
> - Return the i2c error directly.
>
> MAINTAINERS | 7 +
> drivers/media/i2c/Kconfig | 10 ++
> drivers/media/i2c/Makefile | 1 +
> drivers/media/i2c/dw9807.c | 329 +++++++++++++++++++++++++++++++++++++++++++++
> 4 files changed, 347 insertions(+)
> create mode 100644 drivers/media/i2c/dw9807.c
>
> diff --git a/MAINTAINERS b/MAINTAINERS
> index 845fc25..a339bb5 100644
> --- a/MAINTAINERS
> +++ b/MAINTAINERS
> @@ -4385,6 +4385,13 @@ T: git git://linuxtv.org/media_tree.git
> S: Maintained
> F: drivers/media/i2c/dw9714.c
>
> +DONGWOON DW9807 LENS VOICE COIL DRIVER
> +M: Sakari Ailus <sakari.ailus@linux.intel.com>
> +L: linux-media@vger.kernel.org
> +T: git git://linuxtv.org/media_tree.git
> +S: Maintained
> +F: drivers/media/i2c/dw9807.c
> +
> DOUBLETALK DRIVER
> M: "James R. Van Zandt" <jrv@vanzandt.mv.com>
> L: blinux-list@redhat.com
> diff --git a/drivers/media/i2c/Kconfig b/drivers/media/i2c/Kconfig
> index cb5d7ff..fd01842 100644
> --- a/drivers/media/i2c/Kconfig
> +++ b/drivers/media/i2c/Kconfig
> @@ -325,6 +325,16 @@ config VIDEO_DW9714
> capability. This is designed for linear control of
> voice coil motors, controlled via I2C serial interface.
>
> +config VIDEO_DW9807
> + tristate "DW9807 lens voice coil support"
> + depends on I2C && VIDEO_V4L2 && MEDIA_CONTROLLER
> + depends on VIDEO_V4L2_SUBDEV_API
> + ---help---
> + This is a driver for the DW9807 camera lens voice coil.
> + DW9807 is a 10 bit DAC with 100mA output current sink
> + capability. This is designed for linear control of
> + voice coil motors, controlled via I2C serial interface.
> +
> config VIDEO_SAA7110
> tristate "Philips SAA7110 video decoder"
> depends on VIDEO_V4L2 && I2C
> diff --git a/drivers/media/i2c/Makefile b/drivers/media/i2c/Makefile
> index 548a9ef..1b62639 100644
> --- a/drivers/media/i2c/Makefile
> +++ b/drivers/media/i2c/Makefile
> @@ -23,6 +23,7 @@ obj-$(CONFIG_VIDEO_SAA7185) += saa7185.o
> obj-$(CONFIG_VIDEO_SAA6752HS) += saa6752hs.o
> obj-$(CONFIG_VIDEO_AD5820) += ad5820.o
> obj-$(CONFIG_VIDEO_DW9714) += dw9714.o
> +obj-$(CONFIG_VIDEO_DW9807) += dw9807.o
> obj-$(CONFIG_VIDEO_ADV7170) += adv7170.o
> obj-$(CONFIG_VIDEO_ADV7175) += adv7175.o
> obj-$(CONFIG_VIDEO_ADV7180) += adv7180.o
> diff --git a/drivers/media/i2c/dw9807.c b/drivers/media/i2c/dw9807.c
> new file mode 100644
> index 0000000..28ede2b
> --- /dev/null
> +++ b/drivers/media/i2c/dw9807.c
> @@ -0,0 +1,329 @@
> +// SPDX-License-Identifier: GPL-2.0
> +// Copyright (C) 2018 Intel Corporation
> +
> +#include <linux/acpi.h>
> +#include <linux/delay.h>
> +#include <linux/i2c.h>
> +#include <linux/iopoll.h>
> +#include <linux/module.h>
> +#include <linux/pm_runtime.h>
> +#include <media/v4l2-ctrls.h>
> +#include <media/v4l2-device.h>
> +
> +#define DW9807_MAX_FOCUS_POS 1023
> +/*
> + * This sets the minimum granularity for the focus positions.
> + * A value of 1 gives maximum accuracy for a desired focus position.
> + */
> +#define DW9807_FOCUS_STEPS 1
> +/*
> + * This acts as the minimum granularity of lens movement.
> + * Keep this value power of 2, so the control steps can be
> + * uniformly adjusted for gradual lens movement, with desired
> + * number of control steps.
> + */
> +#define DW9807_CTRL_STEPS 16
> +#define DW9807_CTRL_DELAY_US 1000
> +
> +#define DW9807_CTL_ADDR 0x02
> +/*
> + * DW9807 separates two registers to control the VCM position.
> + * One for MSB value, another is LSB value.
> + */
> +#define DW9807_MSB_ADDR 0x03
> +#define DW9807_LSB_ADDR 0x04
> +#define DW9807_STATUS_ADDR 0x05
> +#define DW9807_MODE_ADDR 0x06
> +#define DW9807_RESONANCE_ADDR 0x07
> +
> +#define MAX_RETRY 10
> +
> +struct dw9807_device {
> + struct v4l2_ctrl_handler ctrls_vcm;
> + struct v4l2_subdev sd;
> + u16 current_val;
> +};
> +
> +static inline struct dw9807_device *sd_to_dw9807_vcm(
> + struct v4l2_subdev *subdev)
> +{
> + return container_of(subdev, struct dw9807_device, sd);
> +}
> +
> +static int dw9807_i2c_check(struct i2c_client *client)
> +{
> + const char status_addr = DW9807_STATUS_ADDR;
> + char status_result;
> + int ret;
> +
> + ret = i2c_master_send(client, &status_addr, sizeof(status_addr));
> + if (ret < 0) {
> + dev_err(&client->dev, "I2C write STATUS address fail ret = %d\n",
> + ret);
> + return ret;
> + }
> +
> + ret = i2c_master_recv(client, &status_result, sizeof(status_result));
> + if (ret < 0) {
> + dev_err(&client->dev, "I2C read STATUS value fail ret = %d\n",
> + ret);
> + return ret;
> + }
> +
> + return status_result;
> +}
> +
> +static int dw9807_set_dac(struct i2c_client *client, u16 data)
> +{
> + const char tx_data[3] = {
> + DW9807_MSB_ADDR, ((data >> 8) & 0x03), (data & 0xff)
> + };
> + int val, ret, retry = 0;
> +
> + /*
> + * According to the datasheet, need to check the bus status before we
> + * write VCM position. This ensure that we really write the value
> + * into the register
> + */
> + ret = readx_poll_timeout(dw9807_i2c_check, client, val, val <= 0,
> + DW9807_CTRL_DELAY_US, MAX_RETRY * DW9807_CTRL_DELAY_US);
> +
> + if (ret || val < 0) {
> + if (ret) {
> + dev_warn(&client->dev,
> + "Cannot do the write operation because VCM is busy\n");
> + }
> +
> + return ret ? -EBUSY : val;
> + }
> +
> + /* Write VCM position to registers */
> + ret = i2c_master_send(client, tx_data, sizeof(tx_data));
> + if (ret < 0) {
> + dev_err(&client->dev,
> + "I2C write MSB fail ret=%d\n", ret);
> +
> + return ret;
> + }
> +
> + return 0;
> +}
> +
> +static int dw9807_set_ctrl(struct v4l2_ctrl *ctrl)
> +{
> + struct dw9807_device *dev_vcm = container_of(ctrl->handler,
> + struct dw9807_device, ctrls_vcm);
> +
> + if (ctrl->id == V4L2_CID_FOCUS_ABSOLUTE) {
> + struct i2c_client *client = v4l2_get_subdevdata(&dev_vcm->sd);
> +
> + dev_vcm->current_val = ctrl->val;
> + return dw9807_set_dac(client, ctrl->val);
> + }
> +
> + return -EINVAL;
> +}
> +
> +static const struct v4l2_ctrl_ops dw9807_vcm_ctrl_ops = {
> + .s_ctrl = dw9807_set_ctrl,
> +};
> +
> +static int dw9807_open(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh)
> +{
> + int rval;
> +
> + rval = pm_runtime_get_sync(sd->dev);
> + if (rval < 0) {
> + pm_runtime_put_noidle(sd->dev);
> + return rval;
> + }
> +
> + return 0;
> +}
> +
> +static int dw9807_close(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh)
> +{
> + pm_runtime_put(sd->dev);
> +
> + return 0;
> +}
> +
> +static const struct v4l2_subdev_internal_ops dw9807_int_ops = {
> + .open = dw9807_open,
> + .close = dw9807_close,
> +};
> +
> +static const struct v4l2_subdev_ops dw9807_ops = { };
> +
> +static void dw9807_subdev_cleanup(struct dw9807_device *dw9807_dev)
> +{
> + v4l2_async_unregister_subdev(&dw9807_dev->sd);
> + v4l2_ctrl_handler_free(&dw9807_dev->ctrls_vcm);
> + media_entity_cleanup(&dw9807_dev->sd.entity);
> +}
> +
> +static int dw9807_init_controls(struct dw9807_device *dev_vcm)
> +{
> + struct v4l2_ctrl_handler *hdl = &dev_vcm->ctrls_vcm;
> + const struct v4l2_ctrl_ops *ops = &dw9807_vcm_ctrl_ops;
> + struct i2c_client *client = v4l2_get_subdevdata(&dev_vcm->sd);
> +
> + v4l2_ctrl_handler_init(hdl, 1);
> +
> + v4l2_ctrl_new_std(hdl, ops, V4L2_CID_FOCUS_ABSOLUTE,
> + 0, DW9807_MAX_FOCUS_POS, DW9807_FOCUS_STEPS, 0);
> +
> + dev_vcm->sd.ctrl_handler = hdl;
> + if (hdl->error) {
> + dev_err(&client->dev, "%s fail error: 0x%x\n",
> + __func__, hdl->error);
> + return hdl->error;
> + }
> +
> + return 0;
> +}
> +
> +static int dw9807_probe(struct i2c_client *client)
> +{
> + struct dw9807_device *dw9807_dev;
> + int rval;
> +
> + dw9807_dev = devm_kzalloc(&client->dev, sizeof(*dw9807_dev),
> + GFP_KERNEL);
> + if (dw9807_dev == NULL)
> + return -ENOMEM;
> +
> + v4l2_i2c_subdev_init(&dw9807_dev->sd, client, &dw9807_ops);
> + dw9807_dev->sd.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
> + dw9807_dev->sd.internal_ops = &dw9807_int_ops;
> +
> + rval = dw9807_init_controls(dw9807_dev);
> + if (rval)
> + goto err_cleanup;
> +
> + rval = media_entity_pads_init(&dw9807_dev->sd.entity, 0, NULL);
> + if (rval < 0)
> + goto err_cleanup;
> +
> + dw9807_dev->sd.entity.function = MEDIA_ENT_F_LENS;
> +
> + rval = v4l2_async_register_subdev(&dw9807_dev->sd);
> + if (rval < 0)
> + goto err_cleanup;
> +
> + pm_runtime_set_active(&client->dev);
> + pm_runtime_enable(&client->dev);
> + pm_runtime_idle(&client->dev);
> +
> + return 0;
> +
> +err_cleanup:
> + dw9807_subdev_cleanup(dw9807_dev);
> +
> + return rval;
> +}
> +
> +static int dw9807_remove(struct i2c_client *client)
> +{
> + struct v4l2_subdev *sd = i2c_get_clientdata(client);
> + struct dw9807_device *dw9807_dev = sd_to_dw9807_vcm(sd);
> +
> + pm_runtime_disable(&client->dev);
> + pm_runtime_set_suspended(&client->dev);
> +
> + dw9807_subdev_cleanup(dw9807_dev);
> +
> + return 0;
> +}
> +
> +/*
> + * This function sets the vcm position, so it consumes least current
> + * The lens position is gradually moved in units of DW9807_CTRL_STEPS,
> + * to make the movements smoothly.
> + */
> +static int __maybe_unused dw9807_vcm_suspend(struct device *dev)
> +{
> + struct i2c_client *client = to_i2c_client(dev);
> + struct v4l2_subdev *sd = i2c_get_clientdata(client);
> + struct dw9807_device *dw9807_dev = sd_to_dw9807_vcm(sd);
> + const char tx_data[2] = { DW9807_CTL_ADDR, 0x01 };
> + int ret, val;
> +
> + for (val = dw9807_dev->current_val & ~(DW9807_CTRL_STEPS - 1);
> + val >= 0; val -= DW9807_CTRL_STEPS) {
> + ret = dw9807_set_dac(client, val);
> + if (ret)
> + dev_err_once(dev, "%s I2C failure: %d", __func__, ret);
> + usleep_range(DW9807_CTRL_DELAY_US, DW9807_CTRL_DELAY_US + 10);
> + }
> +
> + /* Power down */
> + ret = i2c_master_send(client, tx_data, sizeof(tx_data));
> + if (ret < 0) {
> + dev_err(&client->dev, "I2C write CTL fail ret = %d\n", ret);
> + return ret;
> + }
> +
> + return 0;
> +}
> +
> +/*
> + * This function sets the vcm position to the value set by the user
> + * through v4l2_ctrl_ops s_ctrl handler
> + * The lens position is gradually moved in units of DW9807_CTRL_STEPS,
> + * to make the movements smoothly.
> + */
> +static int __maybe_unused dw9807_vcm_resume(struct device *dev)
> +{
> + struct i2c_client *client = to_i2c_client(dev);
> + struct v4l2_subdev *sd = i2c_get_clientdata(client);
> + struct dw9807_device *dw9807_dev = sd_to_dw9807_vcm(sd);
> + const char tx_data[2] = { DW9807_CTL_ADDR, 0x00 };
> + int ret, val;
> +
> + /* Power on */
> + ret = i2c_master_send(client, tx_data, sizeof(tx_data));
> + if (ret < 0) {
> + dev_err(&client->dev, "I2C write CTL fail ret = %d\n", ret);
> + return ret;
> + }
> +
> + for (val = dw9807_dev->current_val % DW9807_CTRL_STEPS;
> + val < dw9807_dev->current_val + DW9807_CTRL_STEPS - 1;
> + val += DW9807_CTRL_STEPS) {
> + ret = dw9807_set_dac(client, val);
> + if (ret)
> + dev_err_ratelimited(dev, "%s I2C failure: %d",
> + __func__, ret);
> + usleep_range(DW9807_CTRL_DELAY_US, DW9807_CTRL_DELAY_US + 10);
> + }
> +
> + return 0;
> +}
> +
> +static const struct of_device_id dw9807_of_table[] = {
> + { .compatible = "dongwoon,dw9807" },
> + { /* sentinel */ }
> +};
> +MODULE_DEVICE_TABLE(of, dw9807_of_table);
> +
> +static const struct dev_pm_ops dw9807_pm_ops = {
> + SET_SYSTEM_SLEEP_PM_OPS(dw9807_vcm_suspend, dw9807_vcm_resume)
> + SET_RUNTIME_PM_OPS(dw9807_vcm_suspend, dw9807_vcm_resume, NULL)
> +};
> +
> +static struct i2c_driver dw9807_i2c_driver = {
> + .driver = {
> + .name = "dw9807",
> + .pm = &dw9807_pm_ops,
> + .of_match_table = dw9807_of_table,
> + },
> + .probe_new = dw9807_probe,
> + .remove = dw9807_remove,
> +};
> +
> +module_i2c_driver(dw9807_i2c_driver);
> +
> +MODULE_AUTHOR("Chiang, Alan <alanx.chiang@intel.com>");
> +MODULE_DESCRIPTION("DW9807 VCM driver");
> +MODULE_LICENSE("GPL v2");
> --
> 2.7.4
>
Thanks for your kindly review.
Submitted v9 only with Reviewed/Acked-by.
Regards, Andy
-----Original Message-----
From: jacopo mondi [mailto:jacopo@jmondi.org]
Sent: Wednesday, May 2, 2018 3:17 PM
To: Yeh, Andy <andy.yeh@intel.com>
Cc: linux-media@vger.kernel.org; sakari.ailus@linux.intel.com; devicetree@vger.kernel.org; tfiga@chromium.org; Chiang, AlanX <alanx.chiang@intel.com>
Subject: Re: [RESEND PATCH v8 2/2] media: dw9807: Add dw9807 vcm driver
Hi Andy,
thanks for addressing comments on previous versions
On Wed, Apr 25, 2018 at 10:12:08AM +0800, Andy Yeh wrote:
> From: Alan Chiang <alanx.chiang@intel.com>
>
> DW9807 is a 10 bit DAC from Dongwoon, designed for linear control of
> voice coil motor.
>
> This driver creates a V4L2 subdevice and provides control to set the
> desired focus.
>
> Signed-off-by: Andy Yeh <andy.yeh@intel.com>
Reviewed-by: Jacopo Mondi <jacopo@jmondi.org>
Thanks
j
> ---
> since v1:
> - changed author.
> since v2:
> - addressed outstanding comments.
> - enabled sequential write to update 2 registers in a single transaction.
> since v3:
> - addressed comments for v3.
> - Remove redundant codes and declare some variables as constant variable.
> - separate DT binding to another patch since v4:
> - sent patchset included DT binding with cover page since v6:
> - change the return code of i2c_check
> - fix long cols exceed 80 chars
> - remove #define DW9807_NAME since only used once since v7:
> - Remove some redundant type cast
> - Modify to meet the coding style
> - Replace a while loop by readx_poll_timeout function
> - Return the i2c error directly.
>
> MAINTAINERS | 7 +
> drivers/media/i2c/Kconfig | 10 ++
> drivers/media/i2c/Makefile | 1 +
> drivers/media/i2c/dw9807.c | 329
> +++++++++++++++++++++++++++++++++++++++++++++
> 4 files changed, 347 insertions(+)
> create mode 100644 drivers/media/i2c/dw9807.c
>
> diff --git a/MAINTAINERS b/MAINTAINERS index 845fc25..a339bb5 100644
> --- a/MAINTAINERS
> +++ b/MAINTAINERS
> @@ -4385,6 +4385,13 @@ T: git git://linuxtv.org/media_tree.git
> S: Maintained
> F: drivers/media/i2c/dw9714.c
>
> +DONGWOON DW9807 LENS VOICE COIL DRIVER
> +M: Sakari Ailus <sakari.ailus@linux.intel.com>
> +L: linux-media@vger.kernel.org
> +T: git git://linuxtv.org/media_tree.git
> +S: Maintained
> +F: drivers/media/i2c/dw9807.c
> +
> DOUBLETALK DRIVER
> M: "James R. Van Zandt" <jrv@vanzandt.mv.com>
> L: blinux-list@redhat.com
> diff --git a/drivers/media/i2c/Kconfig b/drivers/media/i2c/Kconfig
> index cb5d7ff..fd01842 100644
> --- a/drivers/media/i2c/Kconfig
> +++ b/drivers/media/i2c/Kconfig
> @@ -325,6 +325,16 @@ config VIDEO_DW9714
> capability. This is designed for linear control of
> voice coil motors, controlled via I2C serial interface.
>
> +config VIDEO_DW9807
> + tristate "DW9807 lens voice coil support"
> + depends on I2C && VIDEO_V4L2 && MEDIA_CONTROLLER
> + depends on VIDEO_V4L2_SUBDEV_API
> + ---help---
> + This is a driver for the DW9807 camera lens voice coil.
> + DW9807 is a 10 bit DAC with 100mA output current sink
> + capability. This is designed for linear control of
> + voice coil motors, controlled via I2C serial interface.
> +
> config VIDEO_SAA7110
> tristate "Philips SAA7110 video decoder"
> depends on VIDEO_V4L2 && I2C
> diff --git a/drivers/media/i2c/Makefile b/drivers/media/i2c/Makefile
> index 548a9ef..1b62639 100644
> --- a/drivers/media/i2c/Makefile
> +++ b/drivers/media/i2c/Makefile
> @@ -23,6 +23,7 @@ obj-$(CONFIG_VIDEO_SAA7185) += saa7185.o
> obj-$(CONFIG_VIDEO_SAA6752HS) += saa6752hs.o
> obj-$(CONFIG_VIDEO_AD5820) += ad5820.o
> obj-$(CONFIG_VIDEO_DW9714) += dw9714.o
> +obj-$(CONFIG_VIDEO_DW9807) += dw9807.o
> obj-$(CONFIG_VIDEO_ADV7170) += adv7170.o
> obj-$(CONFIG_VIDEO_ADV7175) += adv7175.o
> obj-$(CONFIG_VIDEO_ADV7180) += adv7180.o diff --git
> a/drivers/media/i2c/dw9807.c b/drivers/media/i2c/dw9807.c new file
> mode 100644 index 0000000..28ede2b
> --- /dev/null
> +++ b/drivers/media/i2c/dw9807.c
> @@ -0,0 +1,329 @@
> +// SPDX-License-Identifier: GPL-2.0
> +// Copyright (C) 2018 Intel Corporation
> +
> +#include <linux/acpi.h>
> +#include <linux/delay.h>
> +#include <linux/i2c.h>
> +#include <linux/iopoll.h>
> +#include <linux/module.h>
> +#include <linux/pm_runtime.h>
> +#include <media/v4l2-ctrls.h>
> +#include <media/v4l2-device.h>
> +
> +#define DW9807_MAX_FOCUS_POS 1023
> +/*
> + * This sets the minimum granularity for the focus positions.
> + * A value of 1 gives maximum accuracy for a desired focus position.
> + */
> +#define DW9807_FOCUS_STEPS 1
> +/*
> + * This acts as the minimum granularity of lens movement.
> + * Keep this value power of 2, so the control steps can be
> + * uniformly adjusted for gradual lens movement, with desired
> + * number of control steps.
> + */
> +#define DW9807_CTRL_STEPS 16
> +#define DW9807_CTRL_DELAY_US 1000
> +
> +#define DW9807_CTL_ADDR 0x02
> +/*
> + * DW9807 separates two registers to control the VCM position.
> + * One for MSB value, another is LSB value.
> + */
> +#define DW9807_MSB_ADDR 0x03
> +#define DW9807_LSB_ADDR 0x04
> +#define DW9807_STATUS_ADDR 0x05
> +#define DW9807_MODE_ADDR 0x06
> +#define DW9807_RESONANCE_ADDR 0x07
> +
> +#define MAX_RETRY 10
> +
> +struct dw9807_device {
> + struct v4l2_ctrl_handler ctrls_vcm;
> + struct v4l2_subdev sd;
> + u16 current_val;
> +};
> +
> +static inline struct dw9807_device *sd_to_dw9807_vcm(
> + struct v4l2_subdev *subdev)
> +{
> + return container_of(subdev, struct dw9807_device, sd); }
> +
> +static int dw9807_i2c_check(struct i2c_client *client) {
> + const char status_addr = DW9807_STATUS_ADDR;
> + char status_result;
> + int ret;
> +
> + ret = i2c_master_send(client, &status_addr, sizeof(status_addr));
> + if (ret < 0) {
> + dev_err(&client->dev, "I2C write STATUS address fail ret = %d\n",
> + ret);
> + return ret;
> + }
> +
> + ret = i2c_master_recv(client, &status_result, sizeof(status_result));
> + if (ret < 0) {
> + dev_err(&client->dev, "I2C read STATUS value fail ret = %d\n",
> + ret);
> + return ret;
> + }
> +
> + return status_result;
> +}
> +
> +static int dw9807_set_dac(struct i2c_client *client, u16 data) {
> + const char tx_data[3] = {
> + DW9807_MSB_ADDR, ((data >> 8) & 0x03), (data & 0xff)
> + };
> + int val, ret, retry = 0;
> +
> + /*
> + * According to the datasheet, need to check the bus status before we
> + * write VCM position. This ensure that we really write the value
> + * into the register
> + */
> + ret = readx_poll_timeout(dw9807_i2c_check, client, val, val <= 0,
> + DW9807_CTRL_DELAY_US, MAX_RETRY * DW9807_CTRL_DELAY_US);
> +
> + if (ret || val < 0) {
> + if (ret) {
> + dev_warn(&client->dev,
> + "Cannot do the write operation because VCM is busy\n");
> + }
> +
> + return ret ? -EBUSY : val;
> + }
> +
> + /* Write VCM position to registers */
> + ret = i2c_master_send(client, tx_data, sizeof(tx_data));
> + if (ret < 0) {
> + dev_err(&client->dev,
> + "I2C write MSB fail ret=%d\n", ret);
> +
> + return ret;
> + }
> +
> + return 0;
> +}
> +
> +static int dw9807_set_ctrl(struct v4l2_ctrl *ctrl) {
> + struct dw9807_device *dev_vcm = container_of(ctrl->handler,
> + struct dw9807_device, ctrls_vcm);
> +
> + if (ctrl->id == V4L2_CID_FOCUS_ABSOLUTE) {
> + struct i2c_client *client = v4l2_get_subdevdata(&dev_vcm->sd);
> +
> + dev_vcm->current_val = ctrl->val;
> + return dw9807_set_dac(client, ctrl->val);
> + }
> +
> + return -EINVAL;
> +}
> +
> +static const struct v4l2_ctrl_ops dw9807_vcm_ctrl_ops = {
> + .s_ctrl = dw9807_set_ctrl,
> +};
> +
> +static int dw9807_open(struct v4l2_subdev *sd, struct v4l2_subdev_fh
> +*fh) {
> + int rval;
> +
> + rval = pm_runtime_get_sync(sd->dev);
> + if (rval < 0) {
> + pm_runtime_put_noidle(sd->dev);
> + return rval;
> + }
> +
> + return 0;
> +}
> +
> +static int dw9807_close(struct v4l2_subdev *sd, struct v4l2_subdev_fh
> +*fh) {
> + pm_runtime_put(sd->dev);
> +
> + return 0;
> +}
> +
> +static const struct v4l2_subdev_internal_ops dw9807_int_ops = {
> + .open = dw9807_open,
> + .close = dw9807_close,
> +};
> +
> +static const struct v4l2_subdev_ops dw9807_ops = { };
> +
> +static void dw9807_subdev_cleanup(struct dw9807_device *dw9807_dev) {
> + v4l2_async_unregister_subdev(&dw9807_dev->sd);
> + v4l2_ctrl_handler_free(&dw9807_dev->ctrls_vcm);
> + media_entity_cleanup(&dw9807_dev->sd.entity);
> +}
> +
> +static int dw9807_init_controls(struct dw9807_device *dev_vcm) {
> + struct v4l2_ctrl_handler *hdl = &dev_vcm->ctrls_vcm;
> + const struct v4l2_ctrl_ops *ops = &dw9807_vcm_ctrl_ops;
> + struct i2c_client *client = v4l2_get_subdevdata(&dev_vcm->sd);
> +
> + v4l2_ctrl_handler_init(hdl, 1);
> +
> + v4l2_ctrl_new_std(hdl, ops, V4L2_CID_FOCUS_ABSOLUTE,
> + 0, DW9807_MAX_FOCUS_POS, DW9807_FOCUS_STEPS, 0);
> +
> + dev_vcm->sd.ctrl_handler = hdl;
> + if (hdl->error) {
> + dev_err(&client->dev, "%s fail error: 0x%x\n",
> + __func__, hdl->error);
> + return hdl->error;
> + }
> +
> + return 0;
> +}
> +
> +static int dw9807_probe(struct i2c_client *client) {
> + struct dw9807_device *dw9807_dev;
> + int rval;
> +
> + dw9807_dev = devm_kzalloc(&client->dev, sizeof(*dw9807_dev),
> + GFP_KERNEL);
> + if (dw9807_dev == NULL)
> + return -ENOMEM;
> +
> + v4l2_i2c_subdev_init(&dw9807_dev->sd, client, &dw9807_ops);
> + dw9807_dev->sd.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
> + dw9807_dev->sd.internal_ops = &dw9807_int_ops;
> +
> + rval = dw9807_init_controls(dw9807_dev);
> + if (rval)
> + goto err_cleanup;
> +
> + rval = media_entity_pads_init(&dw9807_dev->sd.entity, 0, NULL);
> + if (rval < 0)
> + goto err_cleanup;
> +
> + dw9807_dev->sd.entity.function = MEDIA_ENT_F_LENS;
> +
> + rval = v4l2_async_register_subdev(&dw9807_dev->sd);
> + if (rval < 0)
> + goto err_cleanup;
> +
> + pm_runtime_set_active(&client->dev);
> + pm_runtime_enable(&client->dev);
> + pm_runtime_idle(&client->dev);
> +
> + return 0;
> +
> +err_cleanup:
> + dw9807_subdev_cleanup(dw9807_dev);
> +
> + return rval;
> +}
> +
> +static int dw9807_remove(struct i2c_client *client) {
> + struct v4l2_subdev *sd = i2c_get_clientdata(client);
> + struct dw9807_device *dw9807_dev = sd_to_dw9807_vcm(sd);
> +
> + pm_runtime_disable(&client->dev);
> + pm_runtime_set_suspended(&client->dev);
> +
> + dw9807_subdev_cleanup(dw9807_dev);
> +
> + return 0;
> +}
> +
> +/*
> + * This function sets the vcm position, so it consumes least current
> + * The lens position is gradually moved in units of
> +DW9807_CTRL_STEPS,
> + * to make the movements smoothly.
> + */
> +static int __maybe_unused dw9807_vcm_suspend(struct device *dev) {
> + struct i2c_client *client = to_i2c_client(dev);
> + struct v4l2_subdev *sd = i2c_get_clientdata(client);
> + struct dw9807_device *dw9807_dev = sd_to_dw9807_vcm(sd);
> + const char tx_data[2] = { DW9807_CTL_ADDR, 0x01 };
> + int ret, val;
> +
> + for (val = dw9807_dev->current_val & ~(DW9807_CTRL_STEPS - 1);
> + val >= 0; val -= DW9807_CTRL_STEPS) {
> + ret = dw9807_set_dac(client, val);
> + if (ret)
> + dev_err_once(dev, "%s I2C failure: %d", __func__, ret);
> + usleep_range(DW9807_CTRL_DELAY_US, DW9807_CTRL_DELAY_US + 10);
> + }
> +
> + /* Power down */
> + ret = i2c_master_send(client, tx_data, sizeof(tx_data));
> + if (ret < 0) {
> + dev_err(&client->dev, "I2C write CTL fail ret = %d\n", ret);
> + return ret;
> + }
> +
> + return 0;
> +}
> +
> +/*
> + * This function sets the vcm position to the value set by the user
> + * through v4l2_ctrl_ops s_ctrl handler
> + * The lens position is gradually moved in units of
> +DW9807_CTRL_STEPS,
> + * to make the movements smoothly.
> + */
> +static int __maybe_unused dw9807_vcm_resume(struct device *dev) {
> + struct i2c_client *client = to_i2c_client(dev);
> + struct v4l2_subdev *sd = i2c_get_clientdata(client);
> + struct dw9807_device *dw9807_dev = sd_to_dw9807_vcm(sd);
> + const char tx_data[2] = { DW9807_CTL_ADDR, 0x00 };
> + int ret, val;
> +
> + /* Power on */
> + ret = i2c_master_send(client, tx_data, sizeof(tx_data));
> + if (ret < 0) {
> + dev_err(&client->dev, "I2C write CTL fail ret = %d\n", ret);
> + return ret;
> + }
> +
> + for (val = dw9807_dev->current_val % DW9807_CTRL_STEPS;
> + val < dw9807_dev->current_val + DW9807_CTRL_STEPS - 1;
> + val += DW9807_CTRL_STEPS) {
> + ret = dw9807_set_dac(client, val);
> + if (ret)
> + dev_err_ratelimited(dev, "%s I2C failure: %d",
> + __func__, ret);
> + usleep_range(DW9807_CTRL_DELAY_US, DW9807_CTRL_DELAY_US + 10);
> + }
> +
> + return 0;
> +}
> +
> +static const struct of_device_id dw9807_of_table[] = {
> + { .compatible = "dongwoon,dw9807" },
> + { /* sentinel */ }
> +};
> +MODULE_DEVICE_TABLE(of, dw9807_of_table);
> +
> +static const struct dev_pm_ops dw9807_pm_ops = {
> + SET_SYSTEM_SLEEP_PM_OPS(dw9807_vcm_suspend, dw9807_vcm_resume)
> + SET_RUNTIME_PM_OPS(dw9807_vcm_suspend, dw9807_vcm_resume, NULL) };
> +
> +static struct i2c_driver dw9807_i2c_driver = {
> + .driver = {
> + .name = "dw9807",
> + .pm = &dw9807_pm_ops,
> + .of_match_table = dw9807_of_table,
> + },
> + .probe_new = dw9807_probe,
> + .remove = dw9807_remove,
> +};
> +
> +module_i2c_driver(dw9807_i2c_driver);
> +
> +MODULE_AUTHOR("Chiang, Alan <alanx.chiang@intel.com>");
> +MODULE_DESCRIPTION("DW9807 VCM driver"); MODULE_LICENSE("GPL v2");
> --
> 2.7.4
>
@@ -4385,6 +4385,13 @@ T: git git://linuxtv.org/media_tree.git
S: Maintained
F: drivers/media/i2c/dw9714.c
+DONGWOON DW9807 LENS VOICE COIL DRIVER
+M: Sakari Ailus <sakari.ailus@linux.intel.com>
+L: linux-media@vger.kernel.org
+T: git git://linuxtv.org/media_tree.git
+S: Maintained
+F: drivers/media/i2c/dw9807.c
+
DOUBLETALK DRIVER
M: "James R. Van Zandt" <jrv@vanzandt.mv.com>
L: blinux-list@redhat.com
@@ -325,6 +325,16 @@ config VIDEO_DW9714
capability. This is designed for linear control of
voice coil motors, controlled via I2C serial interface.
+config VIDEO_DW9807
+ tristate "DW9807 lens voice coil support"
+ depends on I2C && VIDEO_V4L2 && MEDIA_CONTROLLER
+ depends on VIDEO_V4L2_SUBDEV_API
+ ---help---
+ This is a driver for the DW9807 camera lens voice coil.
+ DW9807 is a 10 bit DAC with 100mA output current sink
+ capability. This is designed for linear control of
+ voice coil motors, controlled via I2C serial interface.
+
config VIDEO_SAA7110
tristate "Philips SAA7110 video decoder"
depends on VIDEO_V4L2 && I2C
@@ -23,6 +23,7 @@ obj-$(CONFIG_VIDEO_SAA7185) += saa7185.o
obj-$(CONFIG_VIDEO_SAA6752HS) += saa6752hs.o
obj-$(CONFIG_VIDEO_AD5820) += ad5820.o
obj-$(CONFIG_VIDEO_DW9714) += dw9714.o
+obj-$(CONFIG_VIDEO_DW9807) += dw9807.o
obj-$(CONFIG_VIDEO_ADV7170) += adv7170.o
obj-$(CONFIG_VIDEO_ADV7175) += adv7175.o
obj-$(CONFIG_VIDEO_ADV7180) += adv7180.o
new file mode 100644
@@ -0,0 +1,329 @@
+// SPDX-License-Identifier: GPL-2.0
+// Copyright (C) 2018 Intel Corporation
+
+#include <linux/acpi.h>
+#include <linux/delay.h>
+#include <linux/i2c.h>
+#include <linux/iopoll.h>
+#include <linux/module.h>
+#include <linux/pm_runtime.h>
+#include <media/v4l2-ctrls.h>
+#include <media/v4l2-device.h>
+
+#define DW9807_MAX_FOCUS_POS 1023
+/*
+ * This sets the minimum granularity for the focus positions.
+ * A value of 1 gives maximum accuracy for a desired focus position.
+ */
+#define DW9807_FOCUS_STEPS 1
+/*
+ * This acts as the minimum granularity of lens movement.
+ * Keep this value power of 2, so the control steps can be
+ * uniformly adjusted for gradual lens movement, with desired
+ * number of control steps.
+ */
+#define DW9807_CTRL_STEPS 16
+#define DW9807_CTRL_DELAY_US 1000
+
+#define DW9807_CTL_ADDR 0x02
+/*
+ * DW9807 separates two registers to control the VCM position.
+ * One for MSB value, another is LSB value.
+ */
+#define DW9807_MSB_ADDR 0x03
+#define DW9807_LSB_ADDR 0x04
+#define DW9807_STATUS_ADDR 0x05
+#define DW9807_MODE_ADDR 0x06
+#define DW9807_RESONANCE_ADDR 0x07
+
+#define MAX_RETRY 10
+
+struct dw9807_device {
+ struct v4l2_ctrl_handler ctrls_vcm;
+ struct v4l2_subdev sd;
+ u16 current_val;
+};
+
+static inline struct dw9807_device *sd_to_dw9807_vcm(
+ struct v4l2_subdev *subdev)
+{
+ return container_of(subdev, struct dw9807_device, sd);
+}
+
+static int dw9807_i2c_check(struct i2c_client *client)
+{
+ const char status_addr = DW9807_STATUS_ADDR;
+ char status_result;
+ int ret;
+
+ ret = i2c_master_send(client, &status_addr, sizeof(status_addr));
+ if (ret < 0) {
+ dev_err(&client->dev, "I2C write STATUS address fail ret = %d\n",
+ ret);
+ return ret;
+ }
+
+ ret = i2c_master_recv(client, &status_result, sizeof(status_result));
+ if (ret < 0) {
+ dev_err(&client->dev, "I2C read STATUS value fail ret = %d\n",
+ ret);
+ return ret;
+ }
+
+ return status_result;
+}
+
+static int dw9807_set_dac(struct i2c_client *client, u16 data)
+{
+ const char tx_data[3] = {
+ DW9807_MSB_ADDR, ((data >> 8) & 0x03), (data & 0xff)
+ };
+ int val, ret, retry = 0;
+
+ /*
+ * According to the datasheet, need to check the bus status before we
+ * write VCM position. This ensure that we really write the value
+ * into the register
+ */
+ ret = readx_poll_timeout(dw9807_i2c_check, client, val, val <= 0,
+ DW9807_CTRL_DELAY_US, MAX_RETRY * DW9807_CTRL_DELAY_US);
+
+ if (ret || val < 0) {
+ if (ret) {
+ dev_warn(&client->dev,
+ "Cannot do the write operation because VCM is busy\n");
+ }
+
+ return ret ? -EBUSY : val;
+ }
+
+ /* Write VCM position to registers */
+ ret = i2c_master_send(client, tx_data, sizeof(tx_data));
+ if (ret < 0) {
+ dev_err(&client->dev,
+ "I2C write MSB fail ret=%d\n", ret);
+
+ return ret;
+ }
+
+ return 0;
+}
+
+static int dw9807_set_ctrl(struct v4l2_ctrl *ctrl)
+{
+ struct dw9807_device *dev_vcm = container_of(ctrl->handler,
+ struct dw9807_device, ctrls_vcm);
+
+ if (ctrl->id == V4L2_CID_FOCUS_ABSOLUTE) {
+ struct i2c_client *client = v4l2_get_subdevdata(&dev_vcm->sd);
+
+ dev_vcm->current_val = ctrl->val;
+ return dw9807_set_dac(client, ctrl->val);
+ }
+
+ return -EINVAL;
+}
+
+static const struct v4l2_ctrl_ops dw9807_vcm_ctrl_ops = {
+ .s_ctrl = dw9807_set_ctrl,
+};
+
+static int dw9807_open(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh)
+{
+ int rval;
+
+ rval = pm_runtime_get_sync(sd->dev);
+ if (rval < 0) {
+ pm_runtime_put_noidle(sd->dev);
+ return rval;
+ }
+
+ return 0;
+}
+
+static int dw9807_close(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh)
+{
+ pm_runtime_put(sd->dev);
+
+ return 0;
+}
+
+static const struct v4l2_subdev_internal_ops dw9807_int_ops = {
+ .open = dw9807_open,
+ .close = dw9807_close,
+};
+
+static const struct v4l2_subdev_ops dw9807_ops = { };
+
+static void dw9807_subdev_cleanup(struct dw9807_device *dw9807_dev)
+{
+ v4l2_async_unregister_subdev(&dw9807_dev->sd);
+ v4l2_ctrl_handler_free(&dw9807_dev->ctrls_vcm);
+ media_entity_cleanup(&dw9807_dev->sd.entity);
+}
+
+static int dw9807_init_controls(struct dw9807_device *dev_vcm)
+{
+ struct v4l2_ctrl_handler *hdl = &dev_vcm->ctrls_vcm;
+ const struct v4l2_ctrl_ops *ops = &dw9807_vcm_ctrl_ops;
+ struct i2c_client *client = v4l2_get_subdevdata(&dev_vcm->sd);
+
+ v4l2_ctrl_handler_init(hdl, 1);
+
+ v4l2_ctrl_new_std(hdl, ops, V4L2_CID_FOCUS_ABSOLUTE,
+ 0, DW9807_MAX_FOCUS_POS, DW9807_FOCUS_STEPS, 0);
+
+ dev_vcm->sd.ctrl_handler = hdl;
+ if (hdl->error) {
+ dev_err(&client->dev, "%s fail error: 0x%x\n",
+ __func__, hdl->error);
+ return hdl->error;
+ }
+
+ return 0;
+}
+
+static int dw9807_probe(struct i2c_client *client)
+{
+ struct dw9807_device *dw9807_dev;
+ int rval;
+
+ dw9807_dev = devm_kzalloc(&client->dev, sizeof(*dw9807_dev),
+ GFP_KERNEL);
+ if (dw9807_dev == NULL)
+ return -ENOMEM;
+
+ v4l2_i2c_subdev_init(&dw9807_dev->sd, client, &dw9807_ops);
+ dw9807_dev->sd.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
+ dw9807_dev->sd.internal_ops = &dw9807_int_ops;
+
+ rval = dw9807_init_controls(dw9807_dev);
+ if (rval)
+ goto err_cleanup;
+
+ rval = media_entity_pads_init(&dw9807_dev->sd.entity, 0, NULL);
+ if (rval < 0)
+ goto err_cleanup;
+
+ dw9807_dev->sd.entity.function = MEDIA_ENT_F_LENS;
+
+ rval = v4l2_async_register_subdev(&dw9807_dev->sd);
+ if (rval < 0)
+ goto err_cleanup;
+
+ pm_runtime_set_active(&client->dev);
+ pm_runtime_enable(&client->dev);
+ pm_runtime_idle(&client->dev);
+
+ return 0;
+
+err_cleanup:
+ dw9807_subdev_cleanup(dw9807_dev);
+
+ return rval;
+}
+
+static int dw9807_remove(struct i2c_client *client)
+{
+ struct v4l2_subdev *sd = i2c_get_clientdata(client);
+ struct dw9807_device *dw9807_dev = sd_to_dw9807_vcm(sd);
+
+ pm_runtime_disable(&client->dev);
+ pm_runtime_set_suspended(&client->dev);
+
+ dw9807_subdev_cleanup(dw9807_dev);
+
+ return 0;
+}
+
+/*
+ * This function sets the vcm position, so it consumes least current
+ * The lens position is gradually moved in units of DW9807_CTRL_STEPS,
+ * to make the movements smoothly.
+ */
+static int __maybe_unused dw9807_vcm_suspend(struct device *dev)
+{
+ struct i2c_client *client = to_i2c_client(dev);
+ struct v4l2_subdev *sd = i2c_get_clientdata(client);
+ struct dw9807_device *dw9807_dev = sd_to_dw9807_vcm(sd);
+ const char tx_data[2] = { DW9807_CTL_ADDR, 0x01 };
+ int ret, val;
+
+ for (val = dw9807_dev->current_val & ~(DW9807_CTRL_STEPS - 1);
+ val >= 0; val -= DW9807_CTRL_STEPS) {
+ ret = dw9807_set_dac(client, val);
+ if (ret)
+ dev_err_once(dev, "%s I2C failure: %d", __func__, ret);
+ usleep_range(DW9807_CTRL_DELAY_US, DW9807_CTRL_DELAY_US + 10);
+ }
+
+ /* Power down */
+ ret = i2c_master_send(client, tx_data, sizeof(tx_data));
+ if (ret < 0) {
+ dev_err(&client->dev, "I2C write CTL fail ret = %d\n", ret);
+ return ret;
+ }
+
+ return 0;
+}
+
+/*
+ * This function sets the vcm position to the value set by the user
+ * through v4l2_ctrl_ops s_ctrl handler
+ * The lens position is gradually moved in units of DW9807_CTRL_STEPS,
+ * to make the movements smoothly.
+ */
+static int __maybe_unused dw9807_vcm_resume(struct device *dev)
+{
+ struct i2c_client *client = to_i2c_client(dev);
+ struct v4l2_subdev *sd = i2c_get_clientdata(client);
+ struct dw9807_device *dw9807_dev = sd_to_dw9807_vcm(sd);
+ const char tx_data[2] = { DW9807_CTL_ADDR, 0x00 };
+ int ret, val;
+
+ /* Power on */
+ ret = i2c_master_send(client, tx_data, sizeof(tx_data));
+ if (ret < 0) {
+ dev_err(&client->dev, "I2C write CTL fail ret = %d\n", ret);
+ return ret;
+ }
+
+ for (val = dw9807_dev->current_val % DW9807_CTRL_STEPS;
+ val < dw9807_dev->current_val + DW9807_CTRL_STEPS - 1;
+ val += DW9807_CTRL_STEPS) {
+ ret = dw9807_set_dac(client, val);
+ if (ret)
+ dev_err_ratelimited(dev, "%s I2C failure: %d",
+ __func__, ret);
+ usleep_range(DW9807_CTRL_DELAY_US, DW9807_CTRL_DELAY_US + 10);
+ }
+
+ return 0;
+}
+
+static const struct of_device_id dw9807_of_table[] = {
+ { .compatible = "dongwoon,dw9807" },
+ { /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, dw9807_of_table);
+
+static const struct dev_pm_ops dw9807_pm_ops = {
+ SET_SYSTEM_SLEEP_PM_OPS(dw9807_vcm_suspend, dw9807_vcm_resume)
+ SET_RUNTIME_PM_OPS(dw9807_vcm_suspend, dw9807_vcm_resume, NULL)
+};
+
+static struct i2c_driver dw9807_i2c_driver = {
+ .driver = {
+ .name = "dw9807",
+ .pm = &dw9807_pm_ops,
+ .of_match_table = dw9807_of_table,
+ },
+ .probe_new = dw9807_probe,
+ .remove = dw9807_remove,
+};
+
+module_i2c_driver(dw9807_i2c_driver);
+
+MODULE_AUTHOR("Chiang, Alan <alanx.chiang@intel.com>");
+MODULE_DESCRIPTION("DW9807 VCM driver");
+MODULE_LICENSE("GPL v2");