Hi,
On Sunday 18 September 2011 14:25:50 Mauro Carvalho Chehab wrote:
> Em 13-07-2010 20:40, Sergio Aguirre escreveu:
> > This adds LV8093 Piezo Actuator Lens driver.
> >
> > This is currently found in tandem with IMX046 sensor.
>
> Due to patchwork.kernel.org long outage, I'm working on setting a new
> patchwork instance somewhere else. So, I'm importing the old patches and
> double-check if something were missed.
>
> In this proccess, I noticed that, for two times, a driver for lv8093 were
> proposed, one as part of the OMAPZOOM series of patches, back in Feb/2009,
> and a second submission, on this series.
>
> However, it seems that this were never applied, even not having any single
> comment on the last time you've submitted it, as a RFC.
>
> It seems that the omap3 maintainer lost those patches, or am I missing
> something?
If you're talking about the OMAP3 ISP maintainer, indeed, I've never even
noticed the patches :-)
Review inlined.
> > Signed-off-by: Sergio Aguirre <saaguirre@xxxxxx>
> > ---
> >
> > drivers/media/video/Kconfig | 8 +
> > drivers/media/video/Makefile | 1 +
> > drivers/media/video/lv8093.c | 614 ++++++++++++++++++++++++++++++++
> > drivers/media/video/lv8093_regs.h | 76 +++++
> > include/media/lv8093.h | 40 +++
> > include/media/v4l2-chip-ident.h | 3 +
> > 6 files changed, 742 insertions(+), 0 deletions(-)
> > create mode 100644 drivers/media/video/lv8093.c
> > create mode 100644 drivers/media/video/lv8093_regs.h
> > create mode 100644 include/media/lv8093.h
> >
> > diff --git a/drivers/media/video/Kconfig b/drivers/media/video/Kconfig
> > index 10cd7b3..b62adce 100644
> > --- a/drivers/media/video/Kconfig
> > +++ b/drivers/media/video/Kconfig
> > @@ -344,6 +344,14 @@ config VIDEO_IMX046
> >
> > IMX046 camera. It is currently working with the TI OMAP3
> > camera controller.
> >
> > +config VIDEO_LV8093
> > + tristate "Piezo Actuator Lens driver for LV8093"
> > + depends on I2C && VIDEO_V4L2
> > + ---help---
> > + This is a Video4Linux2 lens driver for the Sanyo LV8093.
> > + It is currently working with the TI OMAP3 camera controller
> > + and Sony IMX046 sensor.
> > +
You will need to implement the media controller API to work with the TI OMAP3
ISP.
> > config VIDEO_SAA7110
> >
> > tristate "Philips SAA7110 video decoder"
> > depends on VIDEO_V4L2 && I2C
> >
> > diff --git a/drivers/media/video/Makefile b/drivers/media/video/Makefile
> > index 00341cb..50f528c 100644
> > --- a/drivers/media/video/Makefile
> > +++ b/drivers/media/video/Makefile
> > @@ -39,6 +39,7 @@ obj-$(CONFIG_VIDEO_TDA9840) += tda9840.o
> >
> > obj-$(CONFIG_VIDEO_TEA6415C) += tea6415c.o
> > obj-$(CONFIG_VIDEO_TEA6420) += tea6420.o
> > obj-$(CONFIG_VIDEO_IMX046) += imx046.o
> >
> > +obj-$(CONFIG_VIDEO_LV8093) += lv8093.o
> >
> > obj-$(CONFIG_VIDEO_SAA7110) += saa7110.o
> > obj-$(CONFIG_VIDEO_SAA711X) += saa7115.o
> > obj-$(CONFIG_VIDEO_SAA717X) += saa717x.o
> >
> > diff --git a/drivers/media/video/lv8093.c b/drivers/media/video/lv8093.c
> > new file mode 100644
> > index 0000000..b0b0fcf
> > --- /dev/null
> > +++ b/drivers/media/video/lv8093.c
> > @@ -0,0 +1,614 @@
> > +/*
> > + * drivers/media/video/lv8093.c
> > + *
> > + * LV8093 Piezo Motor (LENS) driver
> > + *
> > + * Copyright (C) 2008-2009 Texas Instruments.
> > + * Copyright (C) 2009 Hewlett-Packard.
> > + *
> > + * This package 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 PACKAGE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
> > + * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
> > + * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
> > + */
> > +
> > +#include <linux/mutex.h>
> > +#include <linux/i2c.h>
> > +#include <linux/delay.h>
> > +#include <linux/platform_device.h>
> > +#include <linux/cdev.h>
> > +#include <linux/device.h>
> > +
> > +#include <media/lv8093.h>
> > +#include <media/v4l2-chip-ident.h>
> > +#include <media/v4l2-device.h>
> > +#include <media/v4l2-subdev.h>
> > +
> > +#include "lv8093_regs.h"
> > +
> > +static struct vcontrol {
> > + struct v4l2_queryctrl qc;
> > +} video_control[] = {
> > + {
> > + {
> > + .id = V4L2_CID_FOCUS_RELATIVE,
> > + .type = V4L2_CTRL_TYPE_INTEGER,
> > + .name = "Lens Relative Position",
> > + .minimum = 0,
> > + .maximum = 0,
> > + .step = LV8093_MAX_RELATIVE_STEP,
> > + .default_value = 0,
> > + }
> > + ,}
> > +};
> > +
> > +static struct i2c_driver lv8093_i2c_driver;
> > +
> > +static struct lv8093_lens_settings {
> > + u8 reg;
> > + u8 val;
> > +} lens_settings[] = {
> > + { /* Set control register */
> > + .reg = CAMAF_LV8093_CTL_REG,
> > + .val = CAMAF_LV8093_GATE0 |
> > + CAMAF_LV8093_ENIN |
> > + CAMAF_LV8093_CKSEL_ONE |
> > + CAMAF_LV8093_RET2 |
> > + CAMAF_LV8093_INIT_OFF,
> > + },
> > + { /* Specify number of clocks per period */
> > + .reg = CAMAF_LV8093_RST_REG,
> > + .val = (LV8093_CLK_PER_PERIOD - 1),
> > + },
> > + { /* Set the GATE_A pulse set value */
> > + .reg = CAMAF_LV8093_GTAS_REG,
> > + .val = (LV8093_TIME_GATEA + 1),
> > + },
> > + { /* Set the GATE_B pulse reset value */
> > + .reg = CAMAF_LV8093_GTBR_REG,
> > + .val = (LV8093_TIME_GATEA + 1 + LV8093_TIME_OFF),
> > + },
> > + { /* Set the GATE_B pulse set value */
> > + .reg = CAMAF_LV8093_GTBS_REG,
> > + .val = (LV8093_TIME_GATEA + 1 +
> > + LV8093_TIME_OFF + LV8093_TIME_GATEB),
> > + },
> > + { /* Specific the number of output pulse steps */
> > + .reg = CAMAF_LV8093_STP_REG,
> > + .val = LV8093_STP,
> > + },
> > + { /* Set the number of swing back of init sequence performed */
> > + .reg = CAMAF_LV8093_MOV_REG,
> > + .val = 0,
> > + },
> > +};
> > +
> > +/**
> > + * find_vctrl - Finds the requested ID in the video control structure
> > array + * @id: ID of control to search the video control array for
> > + *
> > + * Returns the index of the requested ID from the control structure
> > array + */
> > +static int find_vctrl(int id)
> > +{
> > + int i;
> > +
> > + if (id < V4L2_CID_BASE)
> > + return -EDOM;
> > +
> > + for (i = (ARRAY_SIZE(video_control) - 1); i >= 0; i--)
> > + if (video_control[i].qc.id == id)
> > + break;
> > + if (i < 0)
> > + i = -EINVAL;
> > + return i;
> > +}
> > +
> > +/**
> > + * lv8093_reg_read - Reads a value from a register in LV8093 Piezo
> > + * driver device.
> > + * @client: Pointer to structure of I2C client.
> > + * @value: Pointer to u16 for returning value of register to read.
> > + *
> > + * Returns zero if successful, or non-zero otherwise.
> > + **/
> > +static int lv8093_reg_read(struct i2c_client *client, u8 *value)
> > +{
> > + int err;
> > + struct i2c_msg msg[1];
> > +
> > + if (!client->adapter)
> > + return -ENODEV;
> > +
> > + msg->addr = client->addr;
> > + msg->flags = I2C_M_RD;
> > + msg->len = 1;
> > + msg->buf = value;
> > +
> > + err = i2c_transfer(client->adapter, msg, 1);
> > +
> > + if (err < 0)
> > + v4l_err(client, "i2c read failed with error %i", err);
It looks like you're reimplementing i2c_smbus_read_byte_data() and
i2c_smbus_write_byte_data(). Can you use them instead ?
> > +
> > + return err;
> > +}
> > +
> > +/**
> > + * lv8093_reg_write - Writes a value to a register in LV8093 Piezo
> > + * driver device.
> > + * @client: Pointer to structure of I2C client.
> > + * @reg: Register to write.
> > + * @value: Value of register to write.
> > + *
> > + * Returns zero or +ve if successful, -ve for error.
> > + **/
> > +static int lv8093_reg_write(struct i2c_client *client, u8 reg, u8 value)
> > +{
> > + int err;
> > + struct i2c_msg msg[1];
> > + unsigned char data[2];
> > +
> > + if (!client->adapter)
> > + return -ENODEV;
> > +
> > + msg->addr = client->addr;
> > + msg->flags = 0;
> > + msg->len = 2;
> > + msg->buf = data;
> > +
> > + data[0] = reg;
> > + data[1] = value;
> > +
> > + err = i2c_transfer(client->adapter, msg, 1);
> > + if (err < 0)
> > + v4l_err(client, "i2c write failed with error %i", err);
> > +
> > + return err;
> > +}
> > +
> > +/**
> > + * lv8093_detect - Detects LV8093 Piezo driver device.
> > + * @client: Pointer to structure of I2C client.
> > + *
> > + * Returns 0 if successful, -1 if camera is off or if test register
> > value + * wasn't stored properly, or return error from lv8093_reg_write
> > function. + **/
> > +static int lv8093_detect(struct i2c_client *client)
> > +{
> > + int err = 0;
> > + u8 rposn = 0;
> > +
> > + err = lv8093_reg_write(client, CAMAF_LV8093_CTL_REG,
> > + CAMAF_LV8093_GATE0 |
> > + CAMAF_LV8093_CKSEL_ONE |
> > + CAMAF_LV8093_RET2 |
> > + CAMAF_LV8093_INIT_OFF);
> > +
> > + if (err < 0) {
> > + v4l_err(client, "Unable to write LV8093\n");
> > + return err;
> > + }
> > +
> > + err = lv8093_reg_read(client, &rposn);
> > + if (err < 0) {
> > + v4l_err(client, "Unable to read LV8093\n");
> > + return err;
> > + }
> > +
> > + return err;
> > +}
> > +
> > +/**
> > + * lv8093_reginit - Initializes LV8093 Piezo driver device.
> > + * @client: Pointer to structure of I2C client.
> > + *
> > + * Returns 0 if successful, or returns errors from lv8093_reg_write.
> > + **/
> > +static int lv8093_reginit(struct i2c_client *client)
> > +{
> > + int i, err = 0;
> > +
> > + for (i = 0; i < ARRAY_SIZE(lens_settings); i++) {
> > +
> > + err = lv8093_reg_write(client,
> > + lens_settings[i].reg, lens_settings[i].val);
> > +
> > + if (err < 0) {
> > + v4l_err(client, "Unable to initialize LV8093\n");
> > + return err;
> > + }
> > + }
> > +
> > + return 0;
> > +}
> > +
> > +/**
> > + * lv8093_af_setfocus - Sets the desired focus.
> > + * @relpos: Relative focus position:
> > + * -ve - Direction INFINITY.
> > + * +ve - Direction MACRO.
> > + * abs(relpos) gives number of steps in desired direction.
> > + *
> > + * Returns 0 on success, -EINVAL if camera is off or returned errors
> > + * from lv8093_reg_write function.
> > + **/
> > +static int lv8093_af_setfocus(struct v4l2_subdev *subdev, s16 relpos)
> > +{
> > + struct lv8093_device *af_dev = to_lv8093_device(subdev);
> > + struct i2c_client *client = v4l2_get_subdevdata(subdev);
> > + u8 num_pulses = abs(relpos);
> > + int ret = 0;
> > +
> > + if ((af_dev->power_state == V4L2_POWER_OFF) ||
> > + (af_dev->power_state == V4L2_POWER_STANDBY))
> > + return -EINVAL;
> > +
> > + if (relpos >= 0) {
> > + /* Move lens in Macro direction */
> > + ret |= lv8093_reg_write(client, CAMAF_LV8093_DRVPLS_REG,
> > + 0 & (~CAMAF_LV8093_MAC_DIR));
> > + ret |= lv8093_reg_write(client, CAMAF_LV8093_DRVPLS_REG,
> > + num_pulses | CAMAF_LV8093_MAC_DIR);
> > +
> > + } else {
> > + /* Move lens in Infinite direction */
> > + ret |= lv8093_reg_write(client, CAMAF_LV8093_DRVPLS_REG,
> > + 0 | CAMAF_LV8093_MAC_DIR);
> > + ret |= lv8093_reg_write(client, CAMAF_LV8093_DRVPLS_REG,
> > + num_pulses & (~CAMAF_LV8093_MAC_DIR));
> > +
> > + }
> > +
> > + if (ret < 0) {
> > + v4l_err(client, "Unable to write " LV8093_NAME
> > + " lens HW\n");
> > + return -EINVAL;
> > + }
> > +
> > + return 0;
> > +}
> > +
> > +/**
> > + * lv8093_is_busy - Read busy bit.
> > + *
> > + * Returns:
> > + * 0 for READY, -EBUSY for device busy, -EINVAL on error.
> > + **/
> > +static int lv8093_is_busy(struct v4l2_subdev *subdev)
> > +{
> > + struct i2c_client *client = v4l2_get_subdevdata(subdev);
> > + int ret;
> > + u8 regval;
> > +
> > + ret = lv8093_reg_read(client, ®val);
> > +
> > + if (ret < 0) {
> > + dev_err(&client->dev, "Unable to read " LV8093_NAME
> > + " lens HW\n");
> > + return -EINVAL;
> > + }
> > +
> > + if (regval & CAMAF_LV8093_BUSY)
> > + return -EBUSY;
> > +
> > + return 0;
> > +}
> > +
> > +static int lv8093_power_on(struct v4l2_subdev *subdev)
> > +{
> > + struct lv8093_device *lens = to_lv8093_device(subdev);
> > + struct i2c_client *client = v4l2_get_subdevdata(subdev);
> > + int rval = -EINVAL;
> > +
> > + if (lens->pdata->s_power)
> > + rval = lens->pdata->s_power(subdev, 1);
> > +
> > + if (rval < 0) {
> > + v4l_err(client, "Unable to set the power state ON\n");
> > + return rval;
> > + }
> > +
> > + return 0;
> > +}
> > +
> > +static int lv8093_power_off(struct v4l2_subdev *subdev)
> > +{
> > + struct lv8093_device *lens = to_lv8093_device(subdev);
> > + struct i2c_client *client = v4l2_get_subdevdata(subdev);
> > + int rval = -EINVAL;
> > +
> > + if (lens->pdata->s_power)
> > + rval = lens->pdata->s_power(subdev, 0);
> > +
> > + if (rval < 0) {
> > + v4l_err(client, "Unable to set the power state OFF\n");
> > + return rval;
> > + }
> > +
> > + return 0;
> > +}
> > +
> > +/**
> > + * lv8093_dev_init - V4L2 sensor interface handler for
> > vidioc_int_dev_init_num + * @s: pointer to standard V4L2 device
> > structure
> > + *
> > + * Initialise the device when slave attaches to the master. Returns 0
> > if + * lv8093 device could be found, otherwise returns appropriate
> > error. + */
> > +static int lv8093_dev_init(struct v4l2_subdev *subdev)
> > +{
> > + struct i2c_client *client = v4l2_get_subdevdata(subdev);
> > + int err;
> > +
> > + err = lv8093_power_on(subdev);
> > + if (err)
> > + return -ENODEV;
> > +
> > + err = lv8093_detect(client);
> > + if (err < 0) {
> > + v4l_err(client, "Unable to detect " LV8093_NAME
> > + " lens HW\n");
> > + return err;
> > + }
> > + pr_info(LV8093_NAME " Lens HW detected\n");
> > +
> > + err = lv8093_reginit(client);
> > + if (err < 0) {
> > + v4l_err(client, "Unable to initialize " LV8093_NAME
> > + " lens HW\n");
> > + return err;
> > + }
> > +
> > + err = lv8093_power_off(subdev);
> > + if (err)
> > + return -ENODEV;
> > +
> > + return 0;
> > +}
> > +
> > +/*
> > ------------------------------------------------------------------------
> > -- + * V4L2 subdev operations
> > + */
> > +static int lv8093_g_chip_ident(struct v4l2_subdev *subdev,
> > + struct v4l2_dbg_chip_ident *chip)
> > +{
> > + struct i2c_client *client = v4l2_get_subdevdata(subdev);
> > +
> > + return v4l2_chip_ident_i2c_client(client, chip, V4L2_IDENT_LV8093, 0);
> > +}
> > +
> > +static int lv8093_s_config(struct v4l2_subdev *subdev, int irq,
> > + void *platform_data)
> > +{
> > + struct lv8093_device *lens = to_lv8093_device(subdev);
> > +
> > + if (platform_data == NULL)
> > + return -ENODEV;
> > +
> > + lens->pdata = platform_data;
> > +
> > + return lv8093_dev_init(subdev);
> > +}
> > +
> > +/**
> > + * lv8093_queryctrl - V4L2 lens interface handler for VIDIOC_QUERYCTRL
> > ioctl + * @s: pointer to standard V4L2 device structure
> > + * @qc: standard V4L2 VIDIOC_QUERYCTRL ioctl structure
> > + *
> > + * If the requested control is supported, returns the control
> > information + * from the video_control[] array. Otherwise, returns
> > -EINVAL if the + * control is not supported.
> > + */
> > +static int lv8093_queryctrl(struct v4l2_subdev *subdev,
> > + struct v4l2_queryctrl *qc)
> > +{
> > + int i;
> > +
> > + i = find_vctrl(qc->id);
> > + if (i == -EINVAL)
> > + qc->flags = V4L2_CTRL_FLAG_DISABLED;
> > +
> > + if (i < 0)
> > + return -EINVAL;
> > +
> > + *qc = video_control[i].qc;
> > + return 0;
> > +}
> > +
> > +/**
> > + * lv8093_s_ctrl - V4L2 LV8093 lens interface handler for VIDIOC_S_CTRL
> > ioctl + * @s: pointer to standard V4L2 device structure
> > + * @vc: standard V4L2 VIDIOC_S_CTRL ioctl structure
> > + *
> > + * If the requested control is supported, sets the control's current
> > + * value in HW.
> > + * Otherwise, returns -EINVAL if the control is not supported.
> > + */
> > +static int lv8093_s_ctrl(struct v4l2_subdev *subdev, struct v4l2_control
> > *vc) +{
> > + int retval = -EINVAL;
> > + int i;
> > + struct vcontrol *lvc;
> > +
> > + i = find_vctrl(vc->id);
> > + if (i < 0)
> > + return -EINVAL;
> > + lvc = &video_control[i];
> > +
> > + switch (vc->id) {
> > + case V4L2_CID_FOCUS_RELATIVE:
> > + retval = lv8093_af_setfocus(subdev, (s16)vc->value);
> > + break;
> > + }
> > +
> > + return retval;
> > +}
> > +
> > +/**
> > + * lv8093_g_ctrl - V4L2 LV8093 lens interface handler for VIDIOC_G_CTRL
> > ioctl + * @s: pointer to standard V4L2 device structure
> > + * @vc: standard V4L2 VIDIOC_S_CTRL ioctl structure
> > + *
> > + * For V4L2_CID_FOCUS_RELATIVE control always returns the control's
> > value + * as zero. However, the return value is used to return whether
> > the device + * is busy still moving the lens. It will do this by
> > returning -EBUSY (busy) + * or 0 (ready).
> > + * Otherwise, returns -EINVAL if the control is not supported.
> > + */
> > +static int lv8093_g_ctrl(struct v4l2_subdev *subdev, struct v4l2_control
> > *vc) +{
> > + int i, retval = -EINVAL;
> > + struct vcontrol *lvc;
> > +
> > + i = find_vctrl(vc->id);
> > + if (i < 0)
> > + return -EINVAL;
> > + lvc = &video_control[i];
> > +
> > + switch (vc->id) {
> > + case V4L2_CID_FOCUS_RELATIVE:
> > + retval = lv8093_is_busy(subdev);
> > + vc->value = 0;
> > + break;
> > + }
> > + return retval;
> > +}
> > +
> > +/**
> > + * lv8093_s_power - V4L2 sensor interface handler for
> > vidioc_int_s_power_num + * @s: pointer to standard V4L2 device structure
> > + * @on: power state to which device is to be set
> > + *
> > + * Sets devices power state to requested state, if possible.
> > + */
> > +static int lv8093_s_power(struct v4l2_subdev *subdev, int on)
> > +{
> > + struct lv8093_device *lens = to_lv8093_device(subdev);
> > + struct i2c_client *client = v4l2_get_subdevdata(subdev);
> > + int rval = 0;
> > +
> > + if (on) {
> > + rval = lv8093_power_on(subdev);
> > + if (rval)
> > + goto error;
> > +
> > + if (!lens->power_state) {
> > + rval = lv8093_reginit(client);
> > + if (rval < 0) {
> > + v4l_err(client, "Unable to initialize "
> > + LV8093_NAME " lens HW\n");
> > + return rval;
> > + }
> > + }
> > + } else
> > + rval = lv8093_power_off(subdev);
> > +
> > + lens->power_state = on;
Isn't locking needed here ?
> > +error:
> > + return rval;
> > +}
> > +
> > +static const struct v4l2_subdev_core_ops lv8093_core_ops = {
> > + .g_chip_ident = lv8093_g_chip_ident,
There's no need to implement .g_chip_ident with the media controller API.
> > + .s_config = lv8093_s_config,
.s_config has been removed. You're probably looking for .registered in the
internal ops.
> > + .queryctrl = lv8093_queryctrl,
> > + .g_ctrl = lv8093_g_ctrl,
> > + .s_ctrl = lv8093_s_ctrl,
Please use the control framework.
> > + .s_power = lv8093_s_power,
> > +};
> > +
> > +static const struct v4l2_subdev_ops lv8093_ops = {
> > + .core = &lv8093_core_ops,
> > +};
> > +
> > +/**
> > + * lv8093_probe - Probes the driver for valid I2C attachment.
> > + * @client: Pointer to structure of I2C client.
> > + *
> > + * Returns 0 if successful, or -EBUSY if unable to get client attached
> > data. + **/
> > +static int
> > +lv8093_probe(struct i2c_client *client, const struct i2c_device_id *id)
> > +{
> > + struct lv8093_device *lens;
> > +
> > + lens = kzalloc(sizeof(*lens), GFP_KERNEL);
> > + if (lens == NULL)
> > + return -ENOMEM;
> > +
> > + v4l2_i2c_subdev_init(&lens->subdev, client, &lv8093_ops);
> > + return 0;
> > +}
> > +
> > +/**
> > + * lv8093_remove - Routine when device its unregistered from I2C
> > + * @client: Pointer to structure of I2C client.
> > + *
> > + * Returns 0 if successful, or -ENODEV if the client isn't attached.
> > + **/
> > +static int __exit lv8093_remove(struct i2c_client *client)
> > +{
> > + struct v4l2_subdev *subdev = i2c_get_clientdata(client);
> > + struct lv8093_device *lens = to_lv8093_device(subdev);
> > +
> > + v4l2_device_unregister_subdev(&lens->subdev);
> > + kfree(lens);
> > + return 0;
> > +}
> > +
> > +static const struct i2c_device_id lv8093_id[] = {
> > + {LV8093_NAME, 0},
> > + {}
> > +};
> > +
> > +MODULE_DEVICE_TABLE(i2c, lv8093_id);
> > +
> > +static struct i2c_driver lv8093_i2c_driver = {
> > + .driver = {
> > + .name = LV8093_NAME,
> > + .owner = THIS_MODULE,
> > + },
> > + .probe = lv8093_probe,
> > + .remove = __exit_p(lv8093_remove),
> > + .id_table = lv8093_id,
> > +};
> > +
> > +/**
> > + * lv8093_init - Module initialisation.
> > + *
> > + * Returns 0 if successful, or -EINVAL if device couldn't be
> > initialized, or + * added as a character device.
> > + **/
> > +static int __init lv8093_init(void)
> > +{
> > + int err;
> > +
> > + err = i2c_add_driver(&lv8093_i2c_driver);
> > + if (err)
> > + goto fail;
> > + pr_info("Registered " LV8093_NAME " as i2c device.\n");
> > +
> > + return err;
> > +fail:
> > + pr_err("Failed to register " LV8093_NAME " as i2c driver.\n");
> > + return err;
> > +}
> > +
> > +late_initcall(lv8093_init);
> > +
> > +/**
> > + * lv8093_cleanup - Module cleanup.
> > + **/
> > +static void __exit lv8093_cleanup(void)
> > +{
> > + i2c_del_driver(&lv8093_i2c_driver);
> > +}
> > +
> > +module_exit(lv8093_cleanup);
> > +
> > +MODULE_AUTHOR("Texas Instruments");
> > +MODULE_LICENSE("GPL");
> > +MODULE_DESCRIPTION("LV8093 LENS driver");
> > diff --git a/drivers/media/video/lv8093_regs.h
> > b/drivers/media/video/lv8093_regs.h new file mode 100644
> > index 0000000..aaebf03
> > --- /dev/null
> > +++ b/drivers/media/video/lv8093_regs.h
I would merge this with lv8093.c, but that might just be me.
> > @@ -0,0 +1,76 @@
> > +/*
> > + * lv8093_regs.h
> > + *
> > + * Copyright (C) 2008-2009 Texas Instruments.
> > + * Copyright (C) 2009 Hewlett-Packard.
> > + *
> > + * This package 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 PACKAGE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
> > + * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
> > + * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
> > + *
> > + * Register defines for Lens piezo-actuator device
> > + *
> > + */
> > +#ifndef LV8093_REGS_H
> > +#define LV8093_REGS_H
> > +
> > +#include <media/v4l2-int-device.h>
> > +
> > +#define LV8093_I2C_RETRY_COUNT 5
> > +
> > +#define CAMAF_LV8093_DISABLE 0x1
> > +#define CAMAF_LV8093_ENABLE 0x0
> > +#define CAMAF_LV8093_DRVPLS_REG 0x0
> > +#define CAMAF_LV8093_CTL_REG 0x1
> > +#define CAMAF_LV8093_RST_REG 0x2
> > +#define CAMAF_LV8093_GTAS_REG 0x3
> > +#define CAMAF_LV8093_GTBR_REG 0x4
> > +#define CAMAF_LV8093_GTBS_REG 0x5
> > +#define CAMAF_LV8093_STP_REG 0x6
> > +#define CAMAF_LV8093_MOV_REG 0x7
> > +#define CAMAF_LV8093_MAC_DIR 0x80
> > +#define CAMAF_LV8093_INF_DIR 0x00
> > +#define CAMAF_LV8093_GATE0 0x00
> > +#define CAMAF_LV8093_GATE1 0x80
> > +#define CAMAF_LV8093_ENIN 0x20
> > +#define CAMAF_LV8093_CKSEL_ONE 0x18
> > +#define CAMAF_LV8093_CKSEL_HALF 0x08
> > +#define CAMAF_LV8093_CKSEL_QTR 0x00
> > +#define CAMAF_LV8093_RET2 0x00
> > +#define CAMAF_LV8093_RET1 0x02
> > +#define CAMAF_LV8093_RET3 0x04
> > +#define CAMAF_LV8093_RET4 0x06
> > +#define CAMAF_LV8093_INIT_OFF 0x01
> > +#define CAMAF_LV8093_INIT_ON 0x00
> > +#define CAMAF_LV8093_BUSY 0x80
> > +#define CAMAF_LV8093_REGDATA(REG, DATA) (((REG) << 8) | (DATA))
> > +
> > +#define CAMAF_LV8093_POWERDN(ARG) (((ARG) & 0x1) << 15)
> > +#define CAMAF_LV8093_POWERDN_R(ARG) (((ARG) >> 15) & 0x1)
> > +
> > +#define CAMAF_LV8093_DATA(ARG) (((ARG) & 0xFF) << 6)
> > +#define CAMAF_LV8093_DATA_R(ARG) (((ARG) >> 6) & 0xFF)
> > +#define CAMAF_FREQUENCY_EQ1(mclk) ((u16)(mclk/16000))
> > +
> > +/* State of lens */
> > +#define LENS_DETECTED 1
> > +#define LENS_NOT_DETECTED 0
> > +
> > +/* Focus control values */
> > +#define LV8093_MAX_RELATIVE_STEP 127
> > +
> > +/* Initialization Mode Settings */
> > +#define LV8093_TIME_GATEA 23 /* First pulse width. */
> > +#define LV8093_TIME_OFF 2 /* Off time between pulses. */
> > +#define LV8093_TIME_GATEB 29 /* Second pulse width. */
> > +#define LV8093_STP 24 /* Pulse repetitions. */
> > +/* Numbers of clock periods per cycle: */
> > +/* 18MHz clock, period = 55.6 nsec */
> > +#define LV8093_CLK_PER_PERIOD 104
> > +
> > +#endif /* End of of LV8093_REGS_H */
> > +
--
Regards,
Laurent Pinchart
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