^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) * Sanyo LV5207LP LED Driver
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Copyright (C) 2013 Ideas on board SPRL
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) * Contact: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/backlight.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/err.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/fb.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/i2c.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/platform_data/lv5207lp.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #define LV5207LP_CTRL1 0x00
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #define LV5207LP_CPSW (1 << 7)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #define LV5207LP_SCTEN (1 << 6)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) #define LV5207LP_C10 (1 << 5)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) #define LV5207LP_CKSW (1 << 4)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) #define LV5207LP_RSW (1 << 3)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) #define LV5207LP_GSW (1 << 2)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) #define LV5207LP_BSW (1 << 1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) #define LV5207LP_CTRL2 0x01
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) #define LV5207LP_MSW (1 << 7)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) #define LV5207LP_MLED4 (1 << 6)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) #define LV5207LP_RED 0x02
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) #define LV5207LP_GREEN 0x03
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) #define LV5207LP_BLUE 0x04
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) #define LV5207LP_MAX_BRIGHTNESS 32
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) struct lv5207lp {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) struct i2c_client *client;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) struct backlight_device *backlight;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) struct lv5207lp_platform_data *pdata;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) static int lv5207lp_write(struct lv5207lp *lv, u8 reg, u8 data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) return i2c_smbus_write_byte_data(lv->client, reg, data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) static int lv5207lp_backlight_update_status(struct backlight_device *backlight)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) struct lv5207lp *lv = bl_get_data(backlight);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) int brightness = backlight_get_brightness(backlight);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) if (brightness) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) lv5207lp_write(lv, LV5207LP_CTRL1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) LV5207LP_CPSW | LV5207LP_C10 | LV5207LP_CKSW);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) lv5207lp_write(lv, LV5207LP_CTRL2,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) LV5207LP_MSW | LV5207LP_MLED4 |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) (brightness - 1));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) lv5207lp_write(lv, LV5207LP_CTRL1, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) lv5207lp_write(lv, LV5207LP_CTRL2, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) static int lv5207lp_backlight_check_fb(struct backlight_device *backlight,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) struct fb_info *info)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) struct lv5207lp *lv = bl_get_data(backlight);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) return lv->pdata->fbdev == NULL || lv->pdata->fbdev == info->dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) static const struct backlight_ops lv5207lp_backlight_ops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) .options = BL_CORE_SUSPENDRESUME,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) .update_status = lv5207lp_backlight_update_status,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) .check_fb = lv5207lp_backlight_check_fb,
^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) static int lv5207lp_probe(struct i2c_client *client,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) const struct i2c_device_id *id)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) struct lv5207lp_platform_data *pdata = dev_get_platdata(&client->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) struct backlight_device *backlight;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) struct backlight_properties props;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) struct lv5207lp *lv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) if (pdata == NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) dev_err(&client->dev, "No platform data supplied\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) if (!i2c_check_functionality(client->adapter,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) I2C_FUNC_SMBUS_BYTE_DATA)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) dev_warn(&client->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) "I2C adapter doesn't support I2C_FUNC_SMBUS_BYTE\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) return -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) lv = devm_kzalloc(&client->dev, sizeof(*lv), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) if (!lv)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) lv->client = client;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) lv->pdata = pdata;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) memset(&props, 0, sizeof(props));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) props.type = BACKLIGHT_RAW;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) props.max_brightness = min_t(unsigned int, pdata->max_value,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) LV5207LP_MAX_BRIGHTNESS);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) props.brightness = clamp_t(unsigned int, pdata->def_value, 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) props.max_brightness);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) backlight = devm_backlight_device_register(&client->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) dev_name(&client->dev), &lv->client->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) lv, &lv5207lp_backlight_ops, &props);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) if (IS_ERR(backlight)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) dev_err(&client->dev, "failed to register backlight\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) return PTR_ERR(backlight);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) backlight_update_status(backlight);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) i2c_set_clientdata(client, backlight);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) static int lv5207lp_remove(struct i2c_client *client)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) struct backlight_device *backlight = i2c_get_clientdata(client);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) backlight->props.brightness = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) backlight_update_status(backlight);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) static const struct i2c_device_id lv5207lp_ids[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) { "lv5207lp", 0 },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) { }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) MODULE_DEVICE_TABLE(i2c, lv5207lp_ids);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) static struct i2c_driver lv5207lp_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) .driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) .name = "lv5207lp",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) .probe = lv5207lp_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) .remove = lv5207lp_remove,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) .id_table = lv5207lp_ids,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) module_i2c_driver(lv5207lp_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) MODULE_DESCRIPTION("Sanyo LV5207LP Backlight Driver");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) MODULE_AUTHOR("Laurent Pinchart <laurent.pinchart@ideasonboard.com>");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) MODULE_LICENSE("GPL");
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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