[PATCH 2/2] media: i2c: Add GT97xx VCM driver

From: Zhi Mao
Date: Wed Apr 10 2024 - 06:41:08 EST

Add a V4L2 sub-device driver for Giantec GT97xx VCM.

Signed-off-by: Zhi Mao <zhi.mao@xxxxxxxxxxxx>
---
drivers/media/i2c/Kconfig | 13 +
drivers/media/i2c/Makefile | 1 +
drivers/media/i2c/gt97xx.c | 640 +++++++++++++++++++++++++++++++++++++
3 files changed, 654 insertions(+)
create mode 100644 drivers/media/i2c/gt97xx.c

diff --git a/drivers/media/i2c/Kconfig b/drivers/media/i2c/Kconfig
index 56f276b920ab..fcb330cebfe0 100644
--- a/drivers/media/i2c/Kconfig
+++ b/drivers/media/i2c/Kconfig
@@ -759,6 +759,19 @@ config VIDEO_DW9807_VCM
capability. This is designed for linear control of
voice coil motors, controlled via I2C serial interface.

+config VIDEO_GT97XX
+ tristate "GT97xx lens voice coil support"
+ depends on I2C && VIDEO_DEV
+ select MEDIA_CONTROLLER
+ select VIDEO_V4L2_SUBDEV_API
+ select V4L2_FWNODE
+ select V4L2_CCI_I2C
+ help
+ This is a driver for the GT97xx camera lens voice coil.
+ GT97xx is a 10 bit DAC with 100mA output current sink
+ capability. It is designed for linear control of
+ voice coil motors, controlled via I2C serial interface.
+
endmenu

menu "Flash devices"
diff --git a/drivers/media/i2c/Makefile b/drivers/media/i2c/Makefile
index dfbe6448b549..af36a7aa3d12 100644
--- a/drivers/media/i2c/Makefile
+++ b/drivers/media/i2c/Makefile
@@ -39,6 +39,7 @@ obj-$(CONFIG_VIDEO_DW9807_VCM) += dw9807-vcm.o
obj-$(CONFIG_VIDEO_ET8EK8) += et8ek8/
obj-$(CONFIG_VIDEO_GC0308) += gc0308.o
obj-$(CONFIG_VIDEO_GC2145) += gc2145.o
+obj-$(CONFIG_VIDEO_GT97XX) += gt97xx.o
obj-$(CONFIG_VIDEO_HI556) += hi556.o
obj-$(CONFIG_VIDEO_HI846) += hi846.o
obj-$(CONFIG_VIDEO_HI847) += hi847.o
diff --git a/drivers/media/i2c/gt97xx.c b/drivers/media/i2c/gt97xx.c
new file mode 100644
index 000000000000..d91314b872fa
--- /dev/null
+++ b/drivers/media/i2c/gt97xx.c
@@ -0,0 +1,640 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Driver for Giantec gt97xx VCM lens device
+ *
+ * Copyright 2024 MediaTek
+ *
+ * Zhi Mao <zhi.mao@xxxxxxxxxxxx>
+ */
+#include <linux/array_size.h>
+#include <linux/bits.h>
+#include <linux/clk.h>
+#include <linux/container_of.h>
+#include <linux/delay.h>
+#include <linux/device.h>
+#include <linux/err.h>
+#include <linux/gpio/consumer.h>
+#include <linux/mod_devicetable.h>
+#include <linux/pm_runtime.h>
+#include <linux/property.h>
+#include <linux/regulator/consumer.h>
+#include <linux/types.h>
+#include <linux/units.h>
+
+#include <media/v4l2-cci.h>
+#include <media/v4l2-ctrls.h>
+#include <media/v4l2-event.h>
+#include <media/v4l2-fwnode.h>
+#include <media/v4l2-subdev.h>
+
+/* gt97xx chip info register and name */
+#define GT97XX_IC_INFO_REG CCI_REG8(0x00)
+#define GT9768_ID 0xE9
+#define GT9769_ID 0xE1
+#define GT97XX_NAME "gt97xx"
+
+/*
+ * Ring control and Power control register
+ * Bit[1] RING_EN
+ * 0: Direct mode
+ * 1: AAC mode (ringing control mode)
+ * Bit[0] PD
+ * 0: Normal operation mode
+ * 1: Power down mode
+ * gt97xx requires waiting time of Topr after PD reset takes place.
+ */
+#define GT97XX_RING_PD_CONTROL_REG CCI_REG8(0x02)
+#define GT97XX_PD_MODE_OFF 0x00
+#define GT97XX_PD_MODE_EN BIT(0)
+#define GT97XX_AAC_MODE_EN BIT(1)
+
+/*
+ * gt97xx separates two registers to control the VCM position.
+ * One for MSB value, another is LSB value.
+ * DAC_MSB: D[9:8] (ADD: 0x03)
+ * DAC_LSB: D[7:0] (ADD: 0x04)
+ * D[9:0] DAC data input: positive output current = D[9:0] / 1023 * 100[mA]
+ */
+#define GT97XX_MSB_ADDR_REG CCI_REG16(0x03)
+
+/*
+ * AAC mode control & prescale register
+ * Bit[7:5] Namely AC[2:0], decide the VCM mode and operation time.
+ * 001 AAC2 0.48 x Tvib
+ * 010 AAC3 0.70 x Tvib
+ * 011 AAC4 0.75 x Tvib
+ * 101 AAC8 1.13 x Tvib
+ * Bit[2:0] Namely PRESC[2:0], set the internal clock dividing rate as follow.
+ * 000 2
+ * 001 1
+ * 010 1/2
+ * 011 1/4
+ * 100 8
+ * 101 4
+ */
+#define GT97XX_AAC_PRESC_REG CCI_REG8(0x06)
+#define GT97XX_AAC_MODE_SEL_MASK GENMASK(7, 5)
+#define GT97XX_CLOCK_PRE_SCALE_SEL_MASK GENMASK(2, 0)
+
+/*
+ * VCM period of vibration register
+ * Bit[5:0] Defined as VCM rising periodic time (Tvib) together with PRESC[2:0]
+ * Tvib = (6.3ms + AACT[5:0] * 0.1ms) * Dividing Rate
+ * Dividing Rate is the internal clock dividing rate that is defined at
+ * PRESCALE register (ADD: 0x06)
+ */
+#define GT97XX_AAC_TIME_REG CCI_REG8(0x07)
+
+/*
+ * gt97xx requires waiting time (delay time) of t_OPR after power-up,
+ * or in the case of PD reset taking place.
+ */
+#define GT97XX_T_OPR_US (1 * USEC_PER_MSEC)
+#define GT97XX_TVIB_MS_BASE10 (64 - 1)
+#define GT97XX_AAC_MODE_DEFAULT 2
+#define GT97XX_AAC_TIME_DEFAULT 0x20
+#define GT97XX_CLOCK_PRE_SCALE_DEFAULT 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 GT97XX_MOVE_STEPS 16
+#define GT97XX_MAX_FOCUS_POS (1024 - 1)
+
+/*
+ * This sets the minimum granularity for the focus positions.
+ * A value of 1 gives maximum accuracy for a desired focus position
+ */
+#define GT97XX_FOCUS_STEPS 1
+
+enum vcm_giantec_reg_desc {
+ GT_IC_INFO_REG,
+ GT_RING_PD_CONTROL_REG,
+ GT_MSB_ADDR_REG,
+ GT_AAC_PRESC_REG,
+ GT_AAC_TIME_REG,
+ GT_MAX_REG,
+};
+
+struct vcm_giantec_of_data {
+ unsigned int id;
+ unsigned int regs[GT_MAX_REG];
+};
+
+static const char *const gt97xx_supply_names[] = {
+ "vin", /* Digital I/O power */
+ "vdd", /* Digital core power */
+};
+
+/* gt97xx device structure */
+struct gt97xx {
+ struct v4l2_subdev sd;
+
+ struct regulator_bulk_data supplies[ARRAY_SIZE(gt97xx_supply_names)];
+
+ struct v4l2_ctrl_handler ctrls;
+ struct v4l2_ctrl *focus;
+
+ u32 aac_mode;
+ u32 aac_timing;
+ u32 clock_presc;
+ u32 move_delay_us;
+
+ struct regmap *regmap;
+
+ const struct vcm_giantec_of_data *chip;
+};
+
+static inline struct gt97xx *sd_to_gt97xx(struct v4l2_subdev *subdev)
+{
+ return container_of(subdev, struct gt97xx, sd);
+}
+
+struct regval_list {
+ u8 reg_num;
+ u8 value;
+};
+
+struct gt97xx_aac_mode_ot_multi {
+ u32 aac_mode_enum;
+ u32 ot_multi_base100;
+};
+
+struct gt97xx_clk_presc_dividing_rate {
+ u32 clk_presc_enum;
+ u32 dividing_rate_base100;
+};
+
+static const struct gt97xx_aac_mode_ot_multi aac_mode_ot_multi[] = {
+ { 1, 48 },
+ { 2, 70 },
+ { 3, 75 },
+ { 5, 113 },
+};
+
+static const struct gt97xx_clk_presc_dividing_rate presc_dividing_rate[] = {
+ { 0, 200 }, { 1, 100 }, { 2, 50 }, { 3, 25 }, { 4, 800 }, { 5, 400 },
+};
+
+static u32 gt97xx_find_ot_multi(u32 aac_mode_param)
+{
+ u32 cur_ot_multi_base100 = 70;
+ unsigned int i;
+
+ for (i = 0; i < ARRAY_SIZE(aac_mode_ot_multi); i++) {
+ if (aac_mode_ot_multi[i].aac_mode_enum == aac_mode_param) {
+ cur_ot_multi_base100 =
+ aac_mode_ot_multi[i].ot_multi_base100;
+ }
+ }
+
+ return cur_ot_multi_base100;
+}
+
+static u32 gt97xx_find_dividing_rate(u32 presc_param)
+{
+ u32 cur_clk_dividing_rate_base100 = 100;
+ unsigned int i;
+
+ for (i = 0; i < ARRAY_SIZE(presc_dividing_rate); i++) {
+ if (presc_dividing_rate[i].clk_presc_enum == presc_param) {
+ cur_clk_dividing_rate_base100 =
+ presc_dividing_rate[i].dividing_rate_base100;
+ }
+ }
+
+ return cur_clk_dividing_rate_base100;
+}
+
+/*
+ * GT97xx_AAC_PRESC_REG & GT97xx_AAC_TIME_REG determine VCM operation time.
+ * For current VCM mode: AAC3, Operation Time would be 0.70 x Tvib.
+ * Tvib = (6.3ms + AACT[5:0] * 0.1MS) * Dividing Rate.
+ * Below is calculation of the operation delay for each step.
+ */
+static inline u32 gt97xx_cal_move_delay(u32 aac_mode_param, u32 presc_param,
+ u32 aac_timing_param)
+{
+ u32 tvib_us;
+ u32 ot_multi_base100;
+ u32 clk_dividing_rate_base100;
+
+ ot_multi_base100 = gt97xx_find_ot_multi(aac_mode_param);
+
+ clk_dividing_rate_base100 = gt97xx_find_dividing_rate(presc_param);
+
+ tvib_us = (GT97XX_TVIB_MS_BASE10 + aac_timing_param) *
+ clk_dividing_rate_base100;
+
+ return tvib_us * ot_multi_base100 / 100;
+}
+
+static int gt97xx_mod_reg(struct gt97xx *gt97xx, u32 reg, u8 mask, u8 val)
+{
+ u64 read_val;
+ int ret;
+
+ ret = cci_read(gt97xx->regmap, reg, &read_val, NULL);
+ if (ret < 0)
+ return ret;
+
+ val = ((unsigned char)read_val & ~mask) | (val & mask);
+
+ return cci_write(gt97xx->regmap, reg, val, NULL);
+}
+
+static int gt97xx_set_dac(struct gt97xx *gt97xx, u16 val)
+{
+ /* Write VCM position to registers */
+ return cci_write(gt97xx->regmap,
+ gt97xx->chip->regs[GT_MSB_ADDR_REG], val, NULL);
+}
+
+static int gt97xx_identify_module(struct gt97xx *gt97xx)
+{
+ int ret;
+ u64 ic_id;
+ struct i2c_client *client = v4l2_get_subdevdata(&gt97xx->sd);
+
+ ret = cci_read(gt97xx->regmap, gt97xx->chip->regs[GT_IC_INFO_REG],
+ &ic_id, NULL);
+ if (ret < 0)
+ return ret;
+
+ if (ic_id != gt97xx->chip->id) {
+ dev_err(&client->dev, "chip id mismatch: 0x%x!=0x%llx",
+ gt97xx->chip->id, ic_id);
+ return -1;
+ }
+
+ return 0;
+}
+
+static int gt97xx_init(struct gt97xx *gt97xx)
+{
+ int ret, val;
+
+ ret = gt97xx_identify_module(gt97xx);
+ if (ret < 0)
+ return ret;
+
+ /* Reset GT97xx_RING_PD_CONTROL_REG to default status 0x00 */
+ ret = cci_write(gt97xx->regmap,
+ gt97xx->chip->regs[GT_RING_PD_CONTROL_REG],
+ GT97XX_PD_MODE_OFF, NULL);
+ if (ret < 0)
+ return ret;
+
+ /*
+ * GT97xx requires waiting delay time of t_OPR
+ * after PD reset takes place.
+ */
+ fsleep(GT97XX_T_OPR_US);
+
+ /* Set GT97xx_RING_PD_CONTROL_REG to GT97xx_AAC_MODE_EN(0x01) */
+ ret = cci_write(gt97xx->regmap,
+ gt97xx->chip->regs[GT_RING_PD_CONTROL_REG],
+ GT97XX_AAC_MODE_EN, NULL);
+ if (ret < 0)
+ return ret;
+
+ /* Set AAC mode */
+ ret = gt97xx_mod_reg(gt97xx, gt97xx->chip->regs[GT_AAC_PRESC_REG],
+ GT97XX_AAC_MODE_SEL_MASK, gt97xx->aac_mode << 5);
+ if (ret < 0)
+ return ret;
+
+ /* Set clock presc */
+ if (gt97xx->clock_presc != GT97XX_CLOCK_PRE_SCALE_DEFAULT) {
+ ret = gt97xx_mod_reg(gt97xx,
+ gt97xx->chip->regs[GT_AAC_PRESC_REG],
+ GT97XX_CLOCK_PRE_SCALE_SEL_MASK,
+ gt97xx->clock_presc);
+ if (ret < 0)
+ return ret;
+ }
+
+ /* Set AAC Timing */
+ if (gt97xx->aac_timing != GT97XX_AAC_TIME_DEFAULT) {
+ ret = cci_write(gt97xx->regmap,
+ gt97xx->chip->regs[GT_AAC_TIME_REG],
+ gt97xx->aac_timing, NULL);
+ if (ret < 0)
+ return ret;
+ }
+
+ for (val = gt97xx->focus->val % GT97XX_MOVE_STEPS;
+ val <= gt97xx->focus->val; val += GT97XX_MOVE_STEPS) {
+ ret = gt97xx_set_dac(gt97xx, val);
+ if (ret)
+ return ret;
+
+ fsleep(gt97xx->move_delay_us);
+ }
+
+ return 0;
+}
+
+static int gt97xx_release(struct gt97xx *gt97xx)
+{
+ int ret, val;
+
+ val = round_down(gt97xx->focus->val, GT97XX_MOVE_STEPS);
+ for (; val >= 0; val -= GT97XX_MOVE_STEPS) {
+ ret = gt97xx_set_dac(gt97xx, val);
+ if (ret)
+ return ret;
+
+ fsleep(gt97xx->move_delay_us);
+ }
+
+ return 0;
+}
+
+static int gt97xx_power_on(struct device *dev)
+{
+ struct v4l2_subdev *sd = dev_get_drvdata(dev);
+ struct gt97xx *gt97xx = sd_to_gt97xx(sd);
+ int ret;
+
+ ret = regulator_bulk_enable(ARRAY_SIZE(gt97xx_supply_names),
+ gt97xx->supplies);
+ if (ret < 0) {
+ dev_err(dev, "failed to enable regulators\n");
+ return ret;
+ }
+
+ return ret;
+}
+
+static int gt97xx_power_off(struct device *dev)
+{
+ struct v4l2_subdev *sd = dev_get_drvdata(dev);
+ struct gt97xx *gt97xx = sd_to_gt97xx(sd);
+ int ret;
+
+ ret = regulator_bulk_disable(ARRAY_SIZE(gt97xx_supply_names),
+ gt97xx->supplies);
+ if (ret < 0) {
+ dev_err(dev, "failed to disable regulators\n");
+ return ret;
+ }
+
+ return ret;
+}
+
+static int gt97xx_runtime_suspend(struct device *dev)
+{
+ struct v4l2_subdev *sd = dev_get_drvdata(dev);
+ struct gt97xx *gt97xx = sd_to_gt97xx(sd);
+
+ gt97xx_release(gt97xx);
+ gt97xx_power_off(dev);
+
+ return 0;
+}
+
+static int gt97xx_runtime_resume(struct device *dev)
+{
+ struct v4l2_subdev *sd = dev_get_drvdata(dev);
+ struct gt97xx *gt97xx = sd_to_gt97xx(sd);
+ int ret;
+
+ ret = gt97xx_power_on(dev);
+ if (ret < 0) {
+ dev_err(dev, "failed to power_on\n");
+ return ret;
+ }
+
+ /*
+ * The datasheet refers to t_OPR that needs to be waited before sending
+ * I2C commands after power-up.
+ */
+ fsleep(GT97XX_T_OPR_US);
+
+ ret = gt97xx_init(gt97xx);
+ if (ret < 0)
+ goto disable_power;
+
+ return 0;
+
+disable_power:
+ gt97xx_power_off(dev);
+
+ return ret;
+}
+
+static int gt97xx_set_ctrl(struct v4l2_ctrl *ctrl)
+{
+ struct gt97xx *gt97xx =
+ container_of(ctrl->handler, struct gt97xx, ctrls);
+
+ if (ctrl->id == V4L2_CID_FOCUS_ABSOLUTE)
+ return gt97xx_set_dac(gt97xx, ctrl->val);
+
+ return 0;
+}
+
+static const struct v4l2_ctrl_ops gt97xx_ctrl_ops = {
+ .s_ctrl = gt97xx_set_ctrl,
+};
+
+static int gt97xx_open(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh)
+{
+ return pm_runtime_resume_and_get(sd->dev);
+}
+
+static int gt97xx_close(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh)
+{
+ return pm_runtime_put(sd->dev);
+}
+
+static const struct v4l2_subdev_internal_ops gt97xx_int_ops = {
+ .open = gt97xx_open,
+ .close = gt97xx_close,
+};
+
+static const struct v4l2_subdev_core_ops gt97xx_core_ops = {
+ .subscribe_event = v4l2_ctrl_subdev_subscribe_event,
+ .unsubscribe_event = v4l2_event_subdev_unsubscribe,
+};
+
+static const struct v4l2_subdev_ops gt97xx_ops = {
+ .core = &gt97xx_core_ops,
+};
+
+static int gt97xx_init_controls(struct gt97xx *gt97xx)
+{
+ struct v4l2_ctrl_handler *hdl = &gt97xx->ctrls;
+ const struct v4l2_ctrl_ops *ops = &gt97xx_ctrl_ops;
+
+ v4l2_ctrl_handler_init(hdl, 1);
+
+ gt97xx->focus = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_FOCUS_ABSOLUTE, 0,
+ GT97XX_MAX_FOCUS_POS,
+ GT97XX_FOCUS_STEPS, 0);
+
+ if (hdl->error)
+ return hdl->error;
+
+ gt97xx->sd.ctrl_handler = hdl;
+
+ return 0;
+}
+
+static int gt97xx_probe(struct i2c_client *client)
+{
+ struct device *dev = &client->dev;
+ struct gt97xx *gt97xx;
+ unsigned int i;
+ int ret;
+
+ gt97xx = devm_kzalloc(dev, sizeof(*gt97xx), GFP_KERNEL);
+ if (!gt97xx)
+ return -ENOMEM;
+
+ gt97xx->regmap = devm_cci_regmap_init_i2c(client, 8);
+ if (IS_ERR(gt97xx->regmap))
+ return dev_err_probe(dev, PTR_ERR(gt97xx->regmap),
+ "failed to init CCI\n");
+
+ /* Initialize subdev */
+ v4l2_i2c_subdev_init(&gt97xx->sd, client, &gt97xx_ops);
+
+ gt97xx->chip = of_device_get_match_data(dev);
+
+ gt97xx->aac_mode = GT97XX_AAC_MODE_DEFAULT;
+ gt97xx->aac_timing = GT97XX_AAC_TIME_DEFAULT;
+ gt97xx->clock_presc = GT97XX_CLOCK_PRE_SCALE_DEFAULT;
+
+ /* Optional indication of AAC mode select */
+ fwnode_property_read_u32(dev_fwnode(dev), "giantec,aac-mode",
+ &gt97xx->aac_mode);
+
+ /* Optional indication of clock pre-scale select */
+ fwnode_property_read_u32(dev_fwnode(dev), "giantec,clock-presc",
+ &gt97xx->clock_presc);
+
+ /* Optional indication of AAC Timing */
+ fwnode_property_read_u32(dev_fwnode(dev), "giantec,aac-timing",
+ &gt97xx->aac_timing);
+
+ gt97xx->move_delay_us = gt97xx_cal_move_delay(gt97xx->aac_mode,
+ gt97xx->clock_presc,
+ gt97xx->aac_timing);
+
+ for (i = 0; i < ARRAY_SIZE(gt97xx_supply_names); i++)
+ gt97xx->supplies[i].supply = gt97xx_supply_names[i];
+
+ ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(gt97xx_supply_names),
+ gt97xx->supplies);
+ if (ret < 0)
+ return dev_err_probe(dev, ret,
+ "failed to get regulators\n");
+
+ /* Initialize controls */
+ ret = gt97xx_init_controls(gt97xx);
+ if (ret)
+ goto err_free_handler;
+
+ /* Initialize subdev */
+ gt97xx->sd.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
+ gt97xx->sd.internal_ops = &gt97xx_int_ops;
+ gt97xx->sd.entity.function = MEDIA_ENT_F_LENS;
+
+ ret = media_entity_pads_init(&gt97xx->sd.entity, 0, NULL);
+ if (ret < 0)
+ goto err_free_handler;
+
+ /*power on and Initialize hw*/
+ ret = gt97xx_runtime_resume(dev);
+ if (ret < 0) {
+ dev_err(dev, "failed to power on: %d\n", ret);
+ goto err_clean_entity;
+ }
+
+ pm_runtime_set_active(dev);
+ pm_runtime_enable(dev);
+ pm_runtime_set_autosuspend_delay(dev, 1000);
+ pm_runtime_use_autosuspend(dev);
+ pm_runtime_idle(dev);
+
+ ret = v4l2_async_register_subdev(&gt97xx->sd);
+ if (ret < 0) {
+ dev_err(dev, "failed to register V4L2 subdev: %d", ret);
+ goto err_power_off;
+ }
+
+ return 0;
+
+err_power_off:
+ pm_runtime_disable(dev);
+err_clean_entity:
+ media_entity_cleanup(&gt97xx->sd.entity);
+err_free_handler:
+ v4l2_ctrl_handler_free(&gt97xx->ctrls);
+
+ return ret;
+}
+
+static void gt97xx_remove(struct i2c_client *client)
+{
+ struct v4l2_subdev *sd = i2c_get_clientdata(client);
+ struct gt97xx *gt97xx = sd_to_gt97xx(sd);
+
+ v4l2_async_unregister_subdev(&gt97xx->sd);
+ v4l2_ctrl_handler_free(&gt97xx->ctrls);
+ media_entity_cleanup(&gt97xx->sd.entity);
+ pm_runtime_disable(&client->dev);
+ if (!pm_runtime_status_suspended(&client->dev))
+ gt97xx_runtime_suspend(&client->dev);
+ pm_runtime_set_suspended(&client->dev);
+}
+
+static DEFINE_RUNTIME_DEV_PM_OPS(gt97xx_pm_ops,
+ gt97xx_runtime_suspend,
+ gt97xx_runtime_resume,
+ NULL);
+
+static const struct vcm_giantec_of_data gt9768_data = {
+ .id = GT9768_ID,
+ .regs[GT_IC_INFO_REG] = GT97XX_IC_INFO_REG,
+ .regs[GT_RING_PD_CONTROL_REG] = GT97XX_RING_PD_CONTROL_REG,
+ .regs[GT_MSB_ADDR_REG] = GT97XX_MSB_ADDR_REG,
+ .regs[GT_AAC_PRESC_REG] = GT97XX_AAC_PRESC_REG,
+ .regs[GT_AAC_TIME_REG] = GT97XX_AAC_TIME_REG,
+};
+
+static const struct vcm_giantec_of_data gt9769_data = {
+ .id = GT9769_ID,
+ .regs[GT_IC_INFO_REG] = GT97XX_IC_INFO_REG,
+ .regs[GT_RING_PD_CONTROL_REG] = GT97XX_RING_PD_CONTROL_REG,
+ .regs[GT_MSB_ADDR_REG] = GT97XX_MSB_ADDR_REG,
+ .regs[GT_AAC_PRESC_REG] = GT97XX_AAC_PRESC_REG,
+ .regs[GT_AAC_TIME_REG] = GT97XX_AAC_TIME_REG,
+};
+
+static const struct of_device_id gt97xx_of_table[] = {
+ { .compatible = "giantec,gt9768", .data = &gt9768_data },
+ { .compatible = "giantec,gt9769", .data = &gt9769_data },
+ {}
+};
+MODULE_DEVICE_TABLE(of, gt97xx_of_table);
+
+static struct i2c_driver gt97xx_i2c_driver = {
+ .driver = {
+ .name = GT97XX_NAME,
+ .pm = pm_ptr(&gt97xx_pm_ops),
+ .of_match_table = gt97xx_of_table,
+ },
+ .probe = gt97xx_probe,
+ .remove = gt97xx_remove,
+};
+module_i2c_driver(gt97xx_i2c_driver);
+
+MODULE_AUTHOR("Zhi Mao <zhi.mao@xxxxxxxxxxxx>");
+MODULE_DESCRIPTION("GT97xx VCM driver");
+MODULE_LICENSE("GPL");
--
2.25.1