rk8xx.c 4.7 KB

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  1. // SPDX-License-Identifier: GPL-2.0+
  2. /*
  3. * Copyright (C) 2015 Google, Inc
  4. * Written by Simon Glass <sjg@chromium.org>
  5. */
  6. #include <common.h>
  7. #include <dm.h>
  8. #include <errno.h>
  9. #include <log.h>
  10. #include <power/rk8xx_pmic.h>
  11. #include <power/pmic.h>
  12. static struct reg_data rk817_init_reg[] = {
  13. /* enable the under-voltage protection,
  14. * the under-voltage protection will shutdown the LDO3 and reset the PMIC
  15. */
  16. { RK817_BUCK4_CMIN, 0x60, 0x60},
  17. };
  18. static const struct pmic_child_info pmic_children_info[] = {
  19. { .prefix = "DCDC_REG", .driver = "rk8xx_buck"},
  20. { .prefix = "LDO_REG", .driver = "rk8xx_ldo"},
  21. { .prefix = "SWITCH_REG", .driver = "rk8xx_switch"},
  22. { },
  23. };
  24. static int rk8xx_reg_count(struct udevice *dev)
  25. {
  26. return RK808_NUM_OF_REGS;
  27. }
  28. static int rk8xx_write(struct udevice *dev, uint reg, const uint8_t *buff,
  29. int len)
  30. {
  31. int ret;
  32. ret = dm_i2c_write(dev, reg, buff, len);
  33. if (ret) {
  34. debug("write error to device: %p register: %#x!\n", dev, reg);
  35. return ret;
  36. }
  37. return 0;
  38. }
  39. static int rk8xx_read(struct udevice *dev, uint reg, uint8_t *buff, int len)
  40. {
  41. int ret;
  42. ret = dm_i2c_read(dev, reg, buff, len);
  43. if (ret) {
  44. debug("read error from device: %p register: %#x!\n", dev, reg);
  45. return ret;
  46. }
  47. return 0;
  48. }
  49. #if CONFIG_IS_ENABLED(PMIC_CHILDREN)
  50. static int rk8xx_bind(struct udevice *dev)
  51. {
  52. ofnode regulators_node;
  53. int children;
  54. regulators_node = dev_read_subnode(dev, "regulators");
  55. if (!ofnode_valid(regulators_node)) {
  56. debug("%s: %s regulators subnode not found!\n", __func__,
  57. dev->name);
  58. return -ENXIO;
  59. }
  60. debug("%s: '%s' - found regulators subnode\n", __func__, dev->name);
  61. children = pmic_bind_children(dev, regulators_node, pmic_children_info);
  62. if (!children)
  63. debug("%s: %s - no child found\n", __func__, dev->name);
  64. /* Always return success for this device */
  65. return 0;
  66. }
  67. #endif
  68. static int rk8xx_probe(struct udevice *dev)
  69. {
  70. struct rk8xx_priv *priv = dev_get_priv(dev);
  71. struct reg_data *init_data = NULL;
  72. int init_data_num = 0;
  73. int ret = 0, i, show_variant;
  74. u8 msb, lsb, id_msb, id_lsb;
  75. u8 on_source = 0, off_source = 0;
  76. u8 power_en0, power_en1, power_en2, power_en3;
  77. u8 value;
  78. /* read Chip variant */
  79. if (device_is_compatible(dev, "rockchip,rk817") ||
  80. device_is_compatible(dev, "rockchip,rk809")) {
  81. id_msb = RK817_ID_MSB;
  82. id_lsb = RK817_ID_LSB;
  83. } else {
  84. id_msb = ID_MSB;
  85. id_lsb = ID_LSB;
  86. }
  87. ret = rk8xx_read(dev, id_msb, &msb, 1);
  88. if (ret)
  89. return ret;
  90. ret = rk8xx_read(dev, id_lsb, &lsb, 1);
  91. if (ret)
  92. return ret;
  93. priv->variant = ((msb << 8) | lsb) & RK8XX_ID_MSK;
  94. show_variant = priv->variant;
  95. switch (priv->variant) {
  96. case RK808_ID:
  97. show_variant = 0x808; /* RK808 hardware ID is 0 */
  98. break;
  99. case RK805_ID:
  100. case RK816_ID:
  101. case RK818_ID:
  102. on_source = RK8XX_ON_SOURCE;
  103. off_source = RK8XX_OFF_SOURCE;
  104. break;
  105. case RK809_ID:
  106. case RK817_ID:
  107. on_source = RK817_ON_SOURCE;
  108. off_source = RK817_OFF_SOURCE;
  109. init_data = rk817_init_reg;
  110. init_data_num = ARRAY_SIZE(rk817_init_reg);
  111. power_en0 = pmic_reg_read(dev, RK817_POWER_EN0);
  112. power_en1 = pmic_reg_read(dev, RK817_POWER_EN1);
  113. power_en2 = pmic_reg_read(dev, RK817_POWER_EN2);
  114. power_en3 = pmic_reg_read(dev, RK817_POWER_EN3);
  115. value = (power_en0 & 0x0f) | ((power_en1 & 0x0f) << 4);
  116. pmic_reg_write(dev, RK817_POWER_EN_SAVE0, value);
  117. value = (power_en2 & 0x0f) | ((power_en3 & 0x0f) << 4);
  118. pmic_reg_write(dev, RK817_POWER_EN_SAVE1, value);
  119. break;
  120. default:
  121. printf("Unknown PMIC: RK%x!!\n", priv->variant);
  122. return -EINVAL;
  123. }
  124. for (i = 0; i < init_data_num; i++) {
  125. ret = pmic_clrsetbits(dev,
  126. init_data[i].reg,
  127. init_data[i].mask,
  128. init_data[i].val);
  129. if (ret < 0) {
  130. printf("%s: i2c set reg 0x%x failed, ret=%d\n",
  131. __func__, init_data[i].reg, ret);
  132. }
  133. debug("%s: reg[0x%x] = 0x%x\n", __func__, init_data[i].reg,
  134. pmic_reg_read(dev, init_data[i].reg));
  135. }
  136. printf("PMIC: RK%x ", show_variant);
  137. if (on_source && off_source)
  138. printf("(on=0x%02x, off=0x%02x)",
  139. pmic_reg_read(dev, on_source),
  140. pmic_reg_read(dev, off_source));
  141. printf("\n");
  142. return 0;
  143. }
  144. static struct dm_pmic_ops rk8xx_ops = {
  145. .reg_count = rk8xx_reg_count,
  146. .read = rk8xx_read,
  147. .write = rk8xx_write,
  148. };
  149. static const struct udevice_id rk8xx_ids[] = {
  150. { .compatible = "rockchip,rk805" },
  151. { .compatible = "rockchip,rk808" },
  152. { .compatible = "rockchip,rk809" },
  153. { .compatible = "rockchip,rk816" },
  154. { .compatible = "rockchip,rk817" },
  155. { .compatible = "rockchip,rk818" },
  156. { }
  157. };
  158. U_BOOT_DRIVER(rockchip_rk805) = {
  159. .name = "rockchip_rk805",
  160. .id = UCLASS_PMIC,
  161. .of_match = rk8xx_ids,
  162. #if CONFIG_IS_ENABLED(PMIC_CHILDREN)
  163. .bind = rk8xx_bind,
  164. #endif
  165. .priv_auto = sizeof(struct rk8xx_priv),
  166. .probe = rk8xx_probe,
  167. .ops = &rk8xx_ops,
  168. };
  169. DM_DRIVER_ALIAS(rockchip_rk805, rockchip_rk808)