^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0-only
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * drivers/media/i2c/ad5820.c
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * AD5820 DAC driver for camera voice coil focus.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) * Copyright (C) 2008 Nokia Corporation
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) * Copyright (C) 2007 Texas Instruments
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) * Copyright (C) 2016 Pavel Machek <pavel@ucw.cz>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) * Contact: Tuukka Toivonen <tuukkat76@gmail.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) * Sakari Ailus <sakari.ailus@iki.fi>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) * Based on af_d88.c by Texas Instruments.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <linux/errno.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include <linux/i2c.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) #include <linux/regulator/consumer.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) #include <linux/gpio/consumer.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) #include <media/v4l2-ctrls.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) #include <media/v4l2-device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) #include <media/v4l2-subdev.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) /* Register definitions */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) #define AD5820_POWER_DOWN (1 << 15)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) #define AD5820_DAC_SHIFT 4
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) #define AD5820_RAMP_MODE_LINEAR (0 << 3)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) #define AD5820_RAMP_MODE_64_16 (1 << 3)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) #define CODE_TO_RAMP_US(s) ((s) == 0 ? 0 : (1 << ((s) - 1)) * 50)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) #define RAMP_US_TO_CODE(c) fls(((c) + ((c)>>1)) / 50)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) #define to_ad5820_device(sd) container_of(sd, struct ad5820_device, subdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) struct ad5820_device {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) struct v4l2_subdev subdev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) struct ad5820_platform_data *platform_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) struct regulator *vana;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) struct v4l2_ctrl_handler ctrls;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) u32 focus_absolute;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) u32 focus_ramp_time;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) u32 focus_ramp_mode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) struct gpio_desc *enable_gpio;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) struct mutex power_lock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) int power_count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) bool standby;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) static int ad5820_write(struct ad5820_device *coil, u16 data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) struct i2c_client *client = v4l2_get_subdevdata(&coil->subdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) struct i2c_msg msg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) __be16 be_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) int r;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) if (!client->adapter)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) be_data = cpu_to_be16(data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) msg.addr = client->addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) msg.flags = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) msg.len = 2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) msg.buf = (u8 *)&be_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) r = i2c_transfer(client->adapter, &msg, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) if (r < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) dev_err(&client->dev, "write failed, error %d\n", r);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) return r;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) * Calculate status word and write it to the device based on current
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) * values of V4L2 controls. It is assumed that the stored V4L2 control
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) * values are properly limited and rounded.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) static int ad5820_update_hw(struct ad5820_device *coil)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) u16 status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) status = RAMP_US_TO_CODE(coil->focus_ramp_time);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) status |= coil->focus_ramp_mode
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) ? AD5820_RAMP_MODE_64_16 : AD5820_RAMP_MODE_LINEAR;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) status |= coil->focus_absolute << AD5820_DAC_SHIFT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) if (coil->standby)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) status |= AD5820_POWER_DOWN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) return ad5820_write(coil, status);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) * Power handling
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) static int ad5820_power_off(struct ad5820_device *coil, bool standby)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) int ret = 0, ret2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) * Go to standby first as real power off my be denied by the hardware
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) * (single power line control for both coil and sensor).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) if (standby) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) coil->standby = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) ret = ad5820_update_hw(coil);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) gpiod_set_value_cansleep(coil->enable_gpio, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) ret2 = regulator_disable(coil->vana);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) return ret2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) static int ad5820_power_on(struct ad5820_device *coil, bool restore)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) ret = regulator_enable(coil->vana);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) gpiod_set_value_cansleep(coil->enable_gpio, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) if (restore) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) /* Restore the hardware settings. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) coil->standby = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) ret = ad5820_update_hw(coil);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) goto fail;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) fail:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) gpiod_set_value_cansleep(coil->enable_gpio, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) coil->standby = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) regulator_disable(coil->vana);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) * V4L2 controls
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) static int ad5820_set_ctrl(struct v4l2_ctrl *ctrl)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) struct ad5820_device *coil =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) container_of(ctrl->handler, struct ad5820_device, ctrls);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) switch (ctrl->id) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) case V4L2_CID_FOCUS_ABSOLUTE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) coil->focus_absolute = ctrl->val;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) return ad5820_update_hw(coil);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) static const struct v4l2_ctrl_ops ad5820_ctrl_ops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) .s_ctrl = ad5820_set_ctrl,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) static int ad5820_init_controls(struct ad5820_device *coil)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) v4l2_ctrl_handler_init(&coil->ctrls, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) * V4L2_CID_FOCUS_ABSOLUTE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) * Minimum current is 0 mA, maximum is 100 mA. Thus, 1 code is
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) * equivalent to 100/1023 = 0.0978 mA. Nevertheless, we do not use [mA]
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) * for focus position, because it is meaningless for user. Meaningful
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) * would be to use focus distance or even its inverse, but since the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) * driver doesn't have sufficiently knowledge to do the conversion, we
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) * will just use abstract codes here. In any case, smaller value = focus
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) * position farther from camera. The default zero value means focus at
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) * infinity, and also least current consumption.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) v4l2_ctrl_new_std(&coil->ctrls, &ad5820_ctrl_ops,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) V4L2_CID_FOCUS_ABSOLUTE, 0, 1023, 1, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) if (coil->ctrls.error)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) return coil->ctrls.error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) coil->focus_absolute = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) coil->focus_ramp_time = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) coil->focus_ramp_mode = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) coil->subdev.ctrl_handler = &coil->ctrls;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) * V4L2 subdev operations
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) static int ad5820_registered(struct v4l2_subdev *subdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) struct ad5820_device *coil = to_ad5820_device(subdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) return ad5820_init_controls(coil);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) static int
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) ad5820_set_power(struct v4l2_subdev *subdev, int on)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) struct ad5820_device *coil = to_ad5820_device(subdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) int ret = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) mutex_lock(&coil->power_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) * If the power count is modified from 0 to != 0 or from != 0 to 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) * update the power state.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) if (coil->power_count == !on) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) ret = on ? ad5820_power_on(coil, true) :
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) ad5820_power_off(coil, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) goto done;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) /* Update the power count. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) coil->power_count += on ? 1 : -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) WARN_ON(coil->power_count < 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) done:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) mutex_unlock(&coil->power_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) static int ad5820_open(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) return ad5820_set_power(sd, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) static int ad5820_close(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) return ad5820_set_power(sd, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) static const struct v4l2_subdev_core_ops ad5820_core_ops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) .s_power = ad5820_set_power,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) static const struct v4l2_subdev_ops ad5820_ops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) .core = &ad5820_core_ops,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) static const struct v4l2_subdev_internal_ops ad5820_internal_ops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) .registered = ad5820_registered,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) .open = ad5820_open,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) .close = ad5820_close,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) * I2C driver
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) static int __maybe_unused ad5820_suspend(struct device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) struct i2c_client *client = container_of(dev, struct i2c_client, dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) struct v4l2_subdev *subdev = i2c_get_clientdata(client);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) struct ad5820_device *coil = to_ad5820_device(subdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) if (!coil->power_count)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) return ad5820_power_off(coil, false);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) static int __maybe_unused ad5820_resume(struct device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) struct i2c_client *client = container_of(dev, struct i2c_client, dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) struct v4l2_subdev *subdev = i2c_get_clientdata(client);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) struct ad5820_device *coil = to_ad5820_device(subdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) if (!coil->power_count)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) return ad5820_power_on(coil, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) static int ad5820_probe(struct i2c_client *client,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) const struct i2c_device_id *devid)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) struct ad5820_device *coil;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) coil = devm_kzalloc(&client->dev, sizeof(*coil), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) if (!coil)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) coil->vana = devm_regulator_get(&client->dev, "VANA");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) if (IS_ERR(coil->vana)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) ret = PTR_ERR(coil->vana);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) if (ret != -EPROBE_DEFER)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) dev_err(&client->dev, "could not get regulator for vana\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) coil->enable_gpio = devm_gpiod_get_optional(&client->dev, "enable",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) GPIOD_OUT_LOW);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) if (IS_ERR(coil->enable_gpio)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) ret = PTR_ERR(coil->enable_gpio);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) if (ret != -EPROBE_DEFER)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) dev_err(&client->dev, "could not get enable gpio\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) mutex_init(&coil->power_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) v4l2_i2c_subdev_init(&coil->subdev, client, &ad5820_ops);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) coil->subdev.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) coil->subdev.internal_ops = &ad5820_internal_ops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) coil->subdev.entity.function = MEDIA_ENT_F_LENS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) strscpy(coil->subdev.name, "ad5820 focus", sizeof(coil->subdev.name));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) ret = media_entity_pads_init(&coil->subdev.entity, 0, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) goto cleanup2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) ret = v4l2_async_register_subdev(&coil->subdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) goto cleanup;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) cleanup2:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) mutex_destroy(&coil->power_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) cleanup:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) media_entity_cleanup(&coil->subdev.entity);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) static int ad5820_remove(struct i2c_client *client)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) struct v4l2_subdev *subdev = i2c_get_clientdata(client);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) struct ad5820_device *coil = to_ad5820_device(subdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) v4l2_async_unregister_subdev(&coil->subdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) v4l2_ctrl_handler_free(&coil->ctrls);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) media_entity_cleanup(&coil->subdev.entity);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) mutex_destroy(&coil->power_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) static const struct i2c_device_id ad5820_id_table[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) { "ad5820", 0 },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) { "ad5821", 0 },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) { "ad5823", 0 },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) { }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) MODULE_DEVICE_TABLE(i2c, ad5820_id_table);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) static const struct of_device_id ad5820_of_table[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) { .compatible = "adi,ad5820" },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) { .compatible = "adi,ad5821" },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) { .compatible = "adi,ad5823" },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) { }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) MODULE_DEVICE_TABLE(of, ad5820_of_table);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) static SIMPLE_DEV_PM_OPS(ad5820_pm, ad5820_suspend, ad5820_resume);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377) static struct i2c_driver ad5820_i2c_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) .driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379) .name = "ad5820",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380) .pm = &ad5820_pm,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) .of_match_table = ad5820_of_table,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383) .probe = ad5820_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384) .remove = ad5820_remove,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385) .id_table = ad5820_id_table,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) module_i2c_driver(ad5820_i2c_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390) MODULE_AUTHOR("Tuukka Toivonen");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391) MODULE_DESCRIPTION("AD5820 camera lens driver");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) MODULE_LICENSE("GPL");
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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