^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 MAX96776 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) struct max96776 {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) struct device *dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) struct regmap *regmap;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) struct i2c_client *client;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) struct i2c_mux_core *muxc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) struct gpio_desc *enable_gpio;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) u32 stream_id;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) static const struct mfd_cell max96776_devs[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) .name = "max96776-bridge",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) .of_compatible = "maxim,max96776-bridge",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) static int max96776_select(struct i2c_mux_core *muxc, u32 chan)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) static const struct regmap_range max96776_readable_ranges[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) regmap_reg_range(0x0000, 0x0026),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) regmap_reg_range(0x0029, 0x002c),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) regmap_reg_range(0x0050, 0x0050),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) regmap_reg_range(0x0100, 0x0100),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) regmap_reg_range(0x0103, 0x0103),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) regmap_reg_range(0x0108, 0x0108),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) regmap_reg_range(0x0600, 0x0600),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) regmap_reg_range(0x07f0, 0x07f1),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) regmap_reg_range(0x1700, 0x1700),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) regmap_reg_range(0x4100, 0x4100),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) regmap_reg_range(0x6230, 0x6230),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) regmap_reg_range(0xe75e, 0xe75e),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) regmap_reg_range(0xe776, 0xe7bf),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) static const struct regmap_access_table max96776_readable_table = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) .yes_ranges = max96776_readable_ranges,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) .n_yes_ranges = ARRAY_SIZE(max96776_readable_ranges),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) static const struct regmap_config max96776_regmap_config = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) .name = "max96776",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) .reg_bits = 16,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) .val_bits = 8,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) .rd_table = &max96776_readable_table,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) .max_register = 0xff02,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) static void max96776_power_on(struct max96776 *max96776)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) if (max96776->enable_gpio) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) gpiod_direction_output(max96776->enable_gpio, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) msleep(500);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) static void max96776_power_off(struct max96776 *max96776)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) if (max96776->enable_gpio)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) gpiod_direction_output(max96776->enable_gpio, 0);
^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) static int max96776_i2c_probe(struct i2c_client *client)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) struct device *dev = &client->dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) struct device_node *child;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) struct max96776 *max96776;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) unsigned int nr = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) for_each_available_child_of_node(dev->of_node, child) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) if (!of_find_property(child, "reg", NULL))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) nr++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) max96776 = devm_kzalloc(dev, sizeof(*max96776), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) if (!max96776)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) max96776->muxc = i2c_mux_alloc(client->adapter, dev, nr, 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) I2C_MUX_LOCKED, max96776_select, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) if (!max96776->muxc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) max96776->dev = dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) max96776->client = client;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) max96776->enable_gpio = devm_gpiod_get_optional(dev, "enable",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) GPIOD_ASIS);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) if (IS_ERR(max96776->enable_gpio))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) return dev_err_probe(dev, PTR_ERR(max96776->enable_gpio),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) "failed to get enable GPIO\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) ret = device_property_read_u32(dev->parent, "reg", &max96776->stream_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) return dev_err_probe(dev, ret, "failed to get gmsl id\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) i2c_set_clientdata(client, max96776);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) max96776->regmap = devm_regmap_init_i2c(client,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) &max96776_regmap_config);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) if (IS_ERR(max96776->regmap))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) return dev_err_probe(dev, PTR_ERR(max96776->regmap),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) "failed to initialize regmap\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) max96776_power_on(max96776);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) ret = devm_mfd_add_devices(dev, PLATFORM_DEVID_AUTO, max96776_devs,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) ARRAY_SIZE(max96776_devs), NULL, 0, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) for_each_available_child_of_node(dev->of_node, child) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) if (of_property_read_u32(child, "reg", &nr))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) ret = i2c_mux_add_adapter(max96776->muxc, 0, nr, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) if (ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) i2c_mux_del_adapters(max96776->muxc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) static void max96776_i2c_shutdown(struct i2c_client *client)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) struct max96776 *max96776 = i2c_get_clientdata(client);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) max96776_power_off(max96776);
^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) static int __maybe_unused max96776_suspend(struct device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) struct max96776 *max96776 = dev_get_drvdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) max96776_power_off(max96776);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) static int __maybe_unused max96776_resume(struct device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) struct max96776 *max96776 = dev_get_drvdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) max96776_power_on(max96776);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) return 0;
^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) static SIMPLE_DEV_PM_OPS(max96776_pm_ops, max96776_suspend, max96776_resume);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) static const struct of_device_id max96776_of_match[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) { .compatible = "maxim,max96776", },
^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) MODULE_DEVICE_TABLE(of, max96776_of_match);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) static struct i2c_driver max96776_i2c_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) .driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) .name = "max96776",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) .of_match_table = of_match_ptr(max96776_of_match),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) .pm = &max96776_pm_ops,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) .probe_new = max96776_i2c_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) .shutdown = max96776_i2c_shutdown,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) module_i2c_driver(max96776_i2c_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) MODULE_AUTHOR("Guochun Huang <hero.huang@rock-chips.com>");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) MODULE_DESCRIPTION("Maxim max96776 MFD driver");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) MODULE_LICENSE("GPL");
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
3 Commits
0 Branches
0 Tags