^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0-or-later
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * I2C access for DA9052 PMICs.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Copyright(c) 2011 Dialog Semiconductor Ltd.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) * Author: David Dajun Chen <dchen@diasemi.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/device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/input.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/mfd/core.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/i2c.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/err.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <linux/mfd/da9052/da9052.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include <linux/mfd/da9052/reg.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #ifdef CONFIG_OF
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) #include <linux/of.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) #include <linux/of_device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) /* I2C safe register check */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) static inline bool i2c_safe_reg(unsigned char reg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) switch (reg) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) case DA9052_STATUS_A_REG:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) case DA9052_STATUS_B_REG:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) case DA9052_STATUS_C_REG:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) case DA9052_STATUS_D_REG:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) case DA9052_ADC_RES_L_REG:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) case DA9052_ADC_RES_H_REG:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) case DA9052_VDD_RES_REG:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) case DA9052_ICHG_AV_REG:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) case DA9052_TBAT_RES_REG:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) case DA9052_ADCIN4_RES_REG:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) case DA9052_ADCIN5_RES_REG:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) case DA9052_ADCIN6_RES_REG:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) case DA9052_TJUNC_RES_REG:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) case DA9052_TSI_X_MSB_REG:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) case DA9052_TSI_Y_MSB_REG:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) case DA9052_TSI_LSB_REG:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) case DA9052_TSI_Z_MSB_REG:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) return true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) * There is an issue with DA9052 and DA9053_AA/BA/BB PMIC where the PMIC
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) * gets lockup up or fails to respond following a system reset.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) * This fix is to follow any read or write with a dummy read to a safe
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) * register.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) static int da9052_i2c_fix(struct da9052 *da9052, unsigned char reg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) int val;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) switch (da9052->chip_id) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) case DA9052:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) case DA9053_AA:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) case DA9053_BA:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) case DA9053_BB:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) /* A dummy read to a safe register address. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) if (!i2c_safe_reg(reg))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) return regmap_read(da9052->regmap,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) DA9052_PARK_REGISTER,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) &val);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) case DA9053_BC:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) * For other chips parking of I2C register
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) * to a safe place is not required.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) break;
^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) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) * According to errata item 24, multiwrite mode should be avoided
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) * in order to prevent register data corruption after power-down.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) static int da9052_i2c_disable_multiwrite(struct da9052 *da9052)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) int reg_val, ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) ret = regmap_read(da9052->regmap, DA9052_CONTROL_B_REG, ®_val);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) if (!(reg_val & DA9052_CONTROL_B_WRITEMODE)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) reg_val |= DA9052_CONTROL_B_WRITEMODE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) ret = regmap_write(da9052->regmap, DA9052_CONTROL_B_REG,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) reg_val);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) static const struct i2c_device_id da9052_i2c_id[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) {"da9052", DA9052},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) {"da9053-aa", DA9053_AA},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) {"da9053-ba", DA9053_BA},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) {"da9053-bb", DA9053_BB},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) {"da9053-bc", DA9053_BC},
^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) MODULE_DEVICE_TABLE(i2c, da9052_i2c_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) #ifdef CONFIG_OF
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) static const struct of_device_id dialog_dt_ids[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) { .compatible = "dlg,da9052", .data = &da9052_i2c_id[0] },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) { .compatible = "dlg,da9053-aa", .data = &da9052_i2c_id[1] },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) { .compatible = "dlg,da9053-ba", .data = &da9052_i2c_id[2] },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) { .compatible = "dlg,da9053-bb", .data = &da9052_i2c_id[3] },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) { .compatible = "dlg,da9053-bc", .data = &da9052_i2c_id[4] },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) { /* sentinel */ }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) static int da9052_i2c_probe(struct i2c_client *client,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) const struct i2c_device_id *id)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) struct da9052 *da9052;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) da9052 = devm_kzalloc(&client->dev, sizeof(struct da9052), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) if (!da9052)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) da9052->dev = &client->dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) da9052->chip_irq = client->irq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) da9052->fix_io = da9052_i2c_fix;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) i2c_set_clientdata(client, da9052);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) da9052->regmap = devm_regmap_init_i2c(client, &da9052_regmap_config);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) if (IS_ERR(da9052->regmap)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) ret = PTR_ERR(da9052->regmap);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) dev_err(&client->dev, "Failed to allocate register map: %d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) ret);
^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) ret = da9052_i2c_disable_multiwrite(da9052);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) #ifdef CONFIG_OF
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) if (!id) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) struct device_node *np = client->dev.of_node;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) const struct of_device_id *deviceid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) deviceid = of_match_node(dialog_dt_ids, np);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) id = deviceid->data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) if (!id) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) ret = -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) dev_err(&client->dev, "id is null.\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) return da9052_device_init(da9052, id->driver_data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) static int da9052_i2c_remove(struct i2c_client *client)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) struct da9052 *da9052 = i2c_get_clientdata(client);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) da9052_device_exit(da9052);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) static struct i2c_driver da9052_i2c_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) .probe = da9052_i2c_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) .remove = da9052_i2c_remove,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) .id_table = da9052_i2c_id,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) .driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) .name = "da9052",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) #ifdef CONFIG_OF
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) .of_match_table = dialog_dt_ids,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) static int __init da9052_i2c_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) ret = i2c_add_driver(&da9052_i2c_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) if (ret != 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) pr_err("DA9052 I2C registration failed %d\n", ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) return ret;
^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) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) subsys_initcall(da9052_i2c_init);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) static void __exit da9052_i2c_exit(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) i2c_del_driver(&da9052_i2c_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) module_exit(da9052_i2c_exit);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) MODULE_AUTHOR("David Dajun Chen <dchen@diasemi.com>");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) MODULE_DESCRIPTION("I2C driver for Dialog DA9052 PMIC");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) MODULE_LICENSE("GPL");
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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