^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * Maxim MAX96752F MFD driver
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Copyright (C) 2022 Rockchip Electronics Co. Ltd.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/i2c.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/i2c-mux.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/gpio/consumer.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/regmap.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/mfd/core.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/mfd/max96752f.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) static const struct mfd_cell max96752f_devs[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) .name = "max96752f-pinctrl",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) .of_compatible = "maxim,max96752f-pinctrl",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) }, {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) .name = "max96752f-gpio",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) .of_compatible = "maxim,max96752f-gpio",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) }, {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) .name = "max96752f-bridge",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) .of_compatible = "maxim,max96752f-bridge",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) static int max96752f_select(struct i2c_mux_core *muxc, u32 chan)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) static const struct regmap_config max96752f_regmap_config = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) .name = "max96752f",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) .reg_bits = 16,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) .val_bits = 8,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) .max_register = 0x25d,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) static const unsigned short addr_list[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) 0x48, 0x4a, 0x4c, 0x68, 0x6a, 0x6c, 0x28, 0x2a, I2C_CLIENT_END
^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) void max96752f_init(struct max96752f *max96752f)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) struct i2c_client *client = max96752f->client;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) u16 addr = client->addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) u32 id;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) int i, ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) for (i = 0; addr_list[i] != I2C_CLIENT_END; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) client->addr = addr_list[i];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) ret = regmap_read(max96752f->regmap, 0x000d, &id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) if (id == 0x82) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) regmap_write(max96752f->regmap, 0x0000, addr << 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) }
^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) client->addr = addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) regmap_update_bits(max96752f->regmap, 0x0050, STR_SEL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) FIELD_PREP(STR_SEL, max96752f->stream_id));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) regmap_update_bits(max96752f->regmap, 0x0073, TX_SRC_ID,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) FIELD_PREP(TX_SRC_ID, max96752f->stream_id));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) EXPORT_SYMBOL(max96752f_init);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) static void max96752f_power_on(struct max96752f *max96752f)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) if (max96752f->enable_gpio) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) gpiod_direction_output(max96752f->enable_gpio, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) msleep(500);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) }
^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 void max96752f_power_off(struct max96752f *max96752f)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) if (max96752f->enable_gpio)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) gpiod_direction_output(max96752f->enable_gpio, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) static int max96752f_i2c_probe(struct i2c_client *client)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) struct device *dev = &client->dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) struct device_node *child;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) struct max96752f *max96752f;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) unsigned int nr = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) for_each_available_child_of_node(dev->of_node, child) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) if (!of_find_property(child, "reg", NULL))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) nr++;
^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) max96752f = devm_kzalloc(dev, sizeof(*max96752f), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) if (!max96752f)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) max96752f->muxc = i2c_mux_alloc(client->adapter, dev, nr, 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) I2C_MUX_LOCKED, max96752f_select, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) if (!max96752f->muxc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) max96752f->dev = dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) max96752f->client = client;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) max96752f->enable_gpio = devm_gpiod_get_optional(dev, "enable",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) GPIOD_ASIS);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) if (IS_ERR(max96752f->enable_gpio))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) return dev_err_probe(dev, PTR_ERR(max96752f->enable_gpio),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) "failed to get enable GPIO\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) ret = device_property_read_u32(dev->parent, "reg", &max96752f->stream_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) return dev_err_probe(dev, ret, "failed to get gmsl id\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) i2c_set_clientdata(client, max96752f);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) max96752f->regmap = devm_regmap_init_i2c(client,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) &max96752f_regmap_config);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) if (IS_ERR(max96752f->regmap))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) return dev_err_probe(dev, PTR_ERR(max96752f->regmap),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) "failed to initialize regmap\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) max96752f_power_on(max96752f);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) max96752f_init(max96752f);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) ret = devm_mfd_add_devices(dev, PLATFORM_DEVID_AUTO, max96752f_devs,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) ARRAY_SIZE(max96752f_devs), NULL, 0, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) for_each_available_child_of_node(dev->of_node, child) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) if (of_property_read_u32(child, "reg", &nr))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) ret = i2c_mux_add_adapter(max96752f->muxc, 0, nr, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) if (ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) i2c_mux_del_adapters(max96752f->muxc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) }
^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) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) static void max96752f_i2c_shutdown(struct i2c_client *client)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) struct max96752f *max96752f = i2c_get_clientdata(client);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) regmap_update_bits(max96752f->regmap, 0x0010, RESET_ALL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) FIELD_PREP(RESET_ALL, 1));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) max96752f_power_off(max96752f);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) static int __maybe_unused max96752f_suspend(struct device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) struct max96752f *max96752f = dev_get_drvdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) max96752f_power_off(max96752f);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) return 0;
^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) static int __maybe_unused max96752f_resume(struct device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) struct max96752f *max96752f = dev_get_drvdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) max96752f_power_on(max96752f);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) static SIMPLE_DEV_PM_OPS(max96752f_pm_ops, max96752f_suspend, max96752f_resume);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) static const struct of_device_id max96752f_of_match[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) { .compatible = "maxim,max96752f", },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) {}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) MODULE_DEVICE_TABLE(of, max96752f_of_match);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) static struct i2c_driver max96752f_i2c_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) .driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) .name = "max96752f",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) .of_match_table = of_match_ptr(max96752f_of_match),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) .pm = &max96752f_pm_ops,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) .probe_new = max96752f_i2c_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) .shutdown = max96752f_i2c_shutdown,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) module_i2c_driver(max96752f_i2c_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) MODULE_AUTHOR("Wyon Bi <bivvy.bi@rock-chips.com>");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) MODULE_DESCRIPTION("Maxim MAX96752F MFD driver");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) MODULE_LICENSE("GPL");
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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