max77843.c 5.4 KB

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  1. // SPDX-License-Identifier: GPL-2.0+
  2. //
  3. // MFD core driver for the Maxim MAX77843
  4. //
  5. // Copyright (C) 2015 Samsung Electronics
  6. // Author: Jaewon Kim <jaewon02.kim@samsung.com>
  7. // Author: Beomho Seo <beomho.seo@samsung.com>
  8. #include <linux/err.h>
  9. #include <linux/i2c.h>
  10. #include <linux/init.h>
  11. #include <linux/interrupt.h>
  12. #include <linux/mfd/core.h>
  13. #include <linux/mfd/max77693-common.h>
  14. #include <linux/mfd/max77843-private.h>
  15. #include <linux/of_device.h>
  16. #include <linux/platform_device.h>
  17. static const struct mfd_cell max77843_devs[] = {
  18. {
  19. .name = "max77843-muic",
  20. .of_compatible = "maxim,max77843-muic",
  21. }, {
  22. .name = "max77843-regulator",
  23. .of_compatible = "maxim,max77843-regulator",
  24. }, {
  25. .name = "max77843-charger",
  26. .of_compatible = "maxim,max77843-charger"
  27. }, {
  28. .name = "max77843-fuelgauge",
  29. .of_compatible = "maxim,max77843-fuelgauge",
  30. }, {
  31. .name = "max77843-haptic",
  32. .of_compatible = "maxim,max77843-haptic",
  33. },
  34. };
  35. static const struct regmap_config max77843_charger_regmap_config = {
  36. .reg_bits = 8,
  37. .val_bits = 8,
  38. .max_register = MAX77843_CHG_REG_END,
  39. };
  40. static const struct regmap_config max77843_regmap_config = {
  41. .reg_bits = 8,
  42. .val_bits = 8,
  43. .max_register = MAX77843_SYS_REG_END,
  44. };
  45. static const struct regmap_irq max77843_irqs[] = {
  46. /* TOPSYS interrupts */
  47. { .reg_offset = 0, .mask = MAX77843_SYS_IRQ_SYSUVLO_INT, },
  48. { .reg_offset = 0, .mask = MAX77843_SYS_IRQ_SYSOVLO_INT, },
  49. { .reg_offset = 0, .mask = MAX77843_SYS_IRQ_TSHDN_INT, },
  50. { .reg_offset = 0, .mask = MAX77843_SYS_IRQ_TM_INT, },
  51. };
  52. static const struct regmap_irq_chip max77843_irq_chip = {
  53. .name = "max77843",
  54. .status_base = MAX77843_SYS_REG_SYSINTSRC,
  55. .mask_base = MAX77843_SYS_REG_SYSINTMASK,
  56. .mask_invert = false,
  57. .num_regs = 1,
  58. .irqs = max77843_irqs,
  59. .num_irqs = ARRAY_SIZE(max77843_irqs),
  60. };
  61. /* Charger and Charger regulator use same regmap. */
  62. static int max77843_chg_init(struct max77693_dev *max77843)
  63. {
  64. int ret;
  65. max77843->i2c_chg = i2c_new_dummy_device(max77843->i2c->adapter, I2C_ADDR_CHG);
  66. if (IS_ERR(max77843->i2c_chg)) {
  67. dev_err(&max77843->i2c->dev,
  68. "Cannot allocate I2C device for Charger\n");
  69. return PTR_ERR(max77843->i2c_chg);
  70. }
  71. i2c_set_clientdata(max77843->i2c_chg, max77843);
  72. max77843->regmap_chg = devm_regmap_init_i2c(max77843->i2c_chg,
  73. &max77843_charger_regmap_config);
  74. if (IS_ERR(max77843->regmap_chg)) {
  75. ret = PTR_ERR(max77843->regmap_chg);
  76. goto err_chg_i2c;
  77. }
  78. return 0;
  79. err_chg_i2c:
  80. i2c_unregister_device(max77843->i2c_chg);
  81. return ret;
  82. }
  83. static int max77843_probe(struct i2c_client *i2c,
  84. const struct i2c_device_id *id)
  85. {
  86. struct max77693_dev *max77843;
  87. unsigned int reg_data;
  88. int ret;
  89. max77843 = devm_kzalloc(&i2c->dev, sizeof(*max77843), GFP_KERNEL);
  90. if (!max77843)
  91. return -ENOMEM;
  92. i2c_set_clientdata(i2c, max77843);
  93. max77843->dev = &i2c->dev;
  94. max77843->i2c = i2c;
  95. max77843->irq = i2c->irq;
  96. max77843->type = id->driver_data;
  97. max77843->regmap = devm_regmap_init_i2c(i2c,
  98. &max77843_regmap_config);
  99. if (IS_ERR(max77843->regmap)) {
  100. dev_err(&i2c->dev, "Failed to allocate topsys register map\n");
  101. return PTR_ERR(max77843->regmap);
  102. }
  103. ret = regmap_add_irq_chip(max77843->regmap, max77843->irq,
  104. IRQF_TRIGGER_LOW | IRQF_ONESHOT | IRQF_SHARED,
  105. 0, &max77843_irq_chip, &max77843->irq_data_topsys);
  106. if (ret) {
  107. dev_err(&i2c->dev, "Failed to add TOPSYS IRQ chip\n");
  108. return ret;
  109. }
  110. ret = regmap_read(max77843->regmap,
  111. MAX77843_SYS_REG_PMICID, &reg_data);
  112. if (ret < 0) {
  113. dev_err(&i2c->dev, "Failed to read PMIC ID\n");
  114. goto err_pmic_id;
  115. }
  116. dev_info(&i2c->dev, "device ID: 0x%x\n", reg_data);
  117. ret = max77843_chg_init(max77843);
  118. if (ret) {
  119. dev_err(&i2c->dev, "Failed to init Charger\n");
  120. goto err_pmic_id;
  121. }
  122. ret = regmap_update_bits(max77843->regmap,
  123. MAX77843_SYS_REG_INTSRCMASK,
  124. MAX77843_INTSRC_MASK_MASK,
  125. (unsigned int)~MAX77843_INTSRC_MASK_MASK);
  126. if (ret < 0) {
  127. dev_err(&i2c->dev, "Failed to unmask interrupt source\n");
  128. goto err_pmic_id;
  129. }
  130. ret = mfd_add_devices(max77843->dev, -1, max77843_devs,
  131. ARRAY_SIZE(max77843_devs), NULL, 0, NULL);
  132. if (ret < 0) {
  133. dev_err(&i2c->dev, "Failed to add mfd device\n");
  134. goto err_pmic_id;
  135. }
  136. device_init_wakeup(max77843->dev, true);
  137. return 0;
  138. err_pmic_id:
  139. regmap_del_irq_chip(max77843->irq, max77843->irq_data_topsys);
  140. return ret;
  141. }
  142. static const struct of_device_id max77843_dt_match[] = {
  143. { .compatible = "maxim,max77843", },
  144. { },
  145. };
  146. static const struct i2c_device_id max77843_id[] = {
  147. { "max77843", TYPE_MAX77843, },
  148. { },
  149. };
  150. static int __maybe_unused max77843_suspend(struct device *dev)
  151. {
  152. struct i2c_client *i2c = to_i2c_client(dev);
  153. struct max77693_dev *max77843 = i2c_get_clientdata(i2c);
  154. disable_irq(max77843->irq);
  155. if (device_may_wakeup(dev))
  156. enable_irq_wake(max77843->irq);
  157. return 0;
  158. }
  159. static int __maybe_unused max77843_resume(struct device *dev)
  160. {
  161. struct i2c_client *i2c = to_i2c_client(dev);
  162. struct max77693_dev *max77843 = i2c_get_clientdata(i2c);
  163. if (device_may_wakeup(dev))
  164. disable_irq_wake(max77843->irq);
  165. enable_irq(max77843->irq);
  166. return 0;
  167. }
  168. static SIMPLE_DEV_PM_OPS(max77843_pm, max77843_suspend, max77843_resume);
  169. static struct i2c_driver max77843_i2c_driver = {
  170. .driver = {
  171. .name = "max77843",
  172. .pm = &max77843_pm,
  173. .of_match_table = max77843_dt_match,
  174. .suppress_bind_attrs = true,
  175. },
  176. .probe = max77843_probe,
  177. .id_table = max77843_id,
  178. };
  179. static int __init max77843_i2c_init(void)
  180. {
  181. return i2c_add_driver(&max77843_i2c_driver);
  182. }
  183. subsys_initcall(max77843_i2c_init);