^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) * ROHM Semiconductor BD6107 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/delay.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/err.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/fb.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/gpio/consumer.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/i2c.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <linux/platform_data/bd6107.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #define BD6107_PSCNT1 0x00
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) #define BD6107_PSCNT1_PSCNTREG2 (1 << 2)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) #define BD6107_PSCNT1_PSCNTREG1 (1 << 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) #define BD6107_REGVSET 0x02
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) #define BD6107_REGVSET_REG1VSET_2_85V (1 << 2)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) #define BD6107_REGVSET_REG1VSET_2_80V (0 << 2)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) #define BD6107_LEDCNT1 0x03
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) #define BD6107_LEDCNT1_LEDONOFF2 (1 << 1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) #define BD6107_LEDCNT1_LEDONOFF1 (1 << 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) #define BD6107_PORTSEL 0x04
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) #define BD6107_PORTSEL_LEDM(n) (1 << (n))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) #define BD6107_RGB1CNT1 0x05
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) #define BD6107_RGB1CNT2 0x06
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) #define BD6107_RGB1CNT3 0x07
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) #define BD6107_RGB1CNT4 0x08
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) #define BD6107_RGB1CNT5 0x09
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) #define BD6107_RGB1FLM 0x0a
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) #define BD6107_RGB2CNT1 0x0b
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) #define BD6107_RGB2CNT2 0x0c
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) #define BD6107_RGB2CNT3 0x0d
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) #define BD6107_RGB2CNT4 0x0e
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) #define BD6107_RGB2CNT5 0x0f
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) #define BD6107_RGB2FLM 0x10
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) #define BD6107_PSCONT3 0x11
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) #define BD6107_SMMONCNT 0x12
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) #define BD6107_DCDCCNT 0x13
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) #define BD6107_IOSEL 0x14
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) #define BD6107_OUT1 0x15
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) #define BD6107_OUT2 0x16
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) #define BD6107_MASK1 0x17
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) #define BD6107_MASK2 0x18
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) #define BD6107_FACTOR1 0x19
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) #define BD6107_FACTOR2 0x1a
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) #define BD6107_CLRFACT1 0x1b
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) #define BD6107_CLRFACT2 0x1c
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) #define BD6107_STATE1 0x1d
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) #define BD6107_LSIVER 0x1e
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) #define BD6107_GRPSEL 0x1f
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) #define BD6107_LEDCNT2 0x20
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) #define BD6107_LEDCNT3 0x21
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) #define BD6107_MCURRENT 0x22
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) #define BD6107_MAINCNT1 0x23
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) #define BD6107_MAINCNT2 0x24
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) #define BD6107_SLOPECNT 0x25
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) #define BD6107_MSLOPE 0x26
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) #define BD6107_RGBSLOPE 0x27
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) #define BD6107_TEST 0x29
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) #define BD6107_SFTRST 0x2a
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) #define BD6107_SFTRSTGD 0x2b
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) struct bd6107 {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) struct i2c_client *client;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) struct backlight_device *backlight;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) struct bd6107_platform_data *pdata;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) struct gpio_desc *reset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) static int bd6107_write(struct bd6107 *bd, u8 reg, u8 data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) return i2c_smbus_write_byte_data(bd->client, reg, data);
^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) static int bd6107_backlight_update_status(struct backlight_device *backlight)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) struct bd6107 *bd = bl_get_data(backlight);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) int brightness = backlight_get_brightness(backlight);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) if (brightness) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) bd6107_write(bd, BD6107_PORTSEL, BD6107_PORTSEL_LEDM(2) |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) BD6107_PORTSEL_LEDM(1) | BD6107_PORTSEL_LEDM(0));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) bd6107_write(bd, BD6107_MAINCNT1, brightness);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) bd6107_write(bd, BD6107_LEDCNT1, BD6107_LEDCNT1_LEDONOFF1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) /* Assert the reset line (gpiolib will handle active low) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) gpiod_set_value(bd->reset, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) msleep(24);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) gpiod_set_value(bd->reset, 0);
^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) return 0;
^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) static int bd6107_backlight_check_fb(struct backlight_device *backlight,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) struct fb_info *info)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) struct bd6107 *bd = bl_get_data(backlight);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) return bd->pdata->fbdev == NULL || bd->pdata->fbdev == info->dev;
^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) static const struct backlight_ops bd6107_backlight_ops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) .options = BL_CORE_SUSPENDRESUME,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) .update_status = bd6107_backlight_update_status,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) .check_fb = bd6107_backlight_check_fb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) static int bd6107_probe(struct i2c_client *client,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) const struct i2c_device_id *id)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) struct bd6107_platform_data *pdata = dev_get_platdata(&client->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) struct backlight_device *backlight;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) struct backlight_properties props;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) struct bd6107 *bd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) if (pdata == NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) dev_err(&client->dev, "No platform data\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) if (!i2c_check_functionality(client->adapter,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) I2C_FUNC_SMBUS_BYTE_DATA)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) dev_warn(&client->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) "I2C adapter doesn't support I2C_FUNC_SMBUS_BYTE\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) return -EIO;
^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) bd = devm_kzalloc(&client->dev, sizeof(*bd), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) if (!bd)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) bd->client = client;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) bd->pdata = pdata;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) * Request the reset GPIO line with GPIOD_OUT_HIGH meaning asserted,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) * so in the machine descriptor table (or other hardware description),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) * the line should be flagged as active low so this will assert
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) * the reset.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) bd->reset = devm_gpiod_get(&client->dev, "reset", GPIOD_OUT_HIGH);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) if (IS_ERR(bd->reset)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) dev_err(&client->dev, "unable to request reset GPIO\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) ret = PTR_ERR(bd->reset);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) memset(&props, 0, sizeof(props));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) props.type = BACKLIGHT_RAW;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) props.max_brightness = 128;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) props.brightness = clamp_t(unsigned int, pdata->def_value, 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) props.max_brightness);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) backlight = devm_backlight_device_register(&client->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) dev_name(&client->dev),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) &bd->client->dev, bd,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) &bd6107_backlight_ops, &props);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) if (IS_ERR(backlight)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) dev_err(&client->dev, "failed to register backlight\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) return PTR_ERR(backlight);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) backlight_update_status(backlight);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) i2c_set_clientdata(client, backlight);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) static int bd6107_remove(struct i2c_client *client)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) struct backlight_device *backlight = i2c_get_clientdata(client);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) backlight->props.brightness = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) backlight_update_status(backlight);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) static const struct i2c_device_id bd6107_ids[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) { "bd6107", 0 },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) { }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) MODULE_DEVICE_TABLE(i2c, bd6107_ids);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) static struct i2c_driver bd6107_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) .driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) .name = "bd6107",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) .probe = bd6107_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) .remove = bd6107_remove,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) .id_table = bd6107_ids,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) module_i2c_driver(bd6107_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) MODULE_DESCRIPTION("Rohm BD6107 Backlight Driver");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) MODULE_AUTHOR("Laurent Pinchart <laurent.pinchart@ideasonboard.com>");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) MODULE_LICENSE("GPL");
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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