clk_sandbox_test.c 4.3 KB

123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197
  1. // SPDX-License-Identifier: GPL-2.0
  2. /*
  3. * Copyright (c) 2016, NVIDIA CORPORATION.
  4. */
  5. #include <common.h>
  6. #include <dm.h>
  7. #include <clk.h>
  8. #include <malloc.h>
  9. #include <asm/clk.h>
  10. #include <dm/device_compat.h>
  11. #include <linux/err.h>
  12. static const char * const sandbox_clk_test_names[] = {
  13. [SANDBOX_CLK_TEST_ID_FIXED] = "fixed",
  14. [SANDBOX_CLK_TEST_ID_SPI] = "spi",
  15. [SANDBOX_CLK_TEST_ID_I2C] = "i2c",
  16. };
  17. int sandbox_clk_test_get(struct udevice *dev)
  18. {
  19. struct sandbox_clk_test *sbct = dev_get_priv(dev);
  20. int i, ret;
  21. for (i = 0; i < SANDBOX_CLK_TEST_NON_DEVM_COUNT; i++) {
  22. ret = clk_get_by_name(dev, sandbox_clk_test_names[i],
  23. &sbct->clks[i]);
  24. if (ret)
  25. return ret;
  26. }
  27. return 0;
  28. }
  29. int sandbox_clk_test_devm_get(struct udevice *dev)
  30. {
  31. struct sandbox_clk_test *sbct = dev_get_priv(dev);
  32. struct clk *clk;
  33. clk = devm_clk_get(dev, "no-an-existing-clock");
  34. if (!IS_ERR(clk)) {
  35. dev_err(dev, "devm_clk_get() should have failed\n");
  36. return -EINVAL;
  37. }
  38. clk = devm_clk_get(dev, "uart2");
  39. if (IS_ERR(clk))
  40. return PTR_ERR(clk);
  41. sbct->clkps[SANDBOX_CLK_TEST_ID_DEVM1] = clk;
  42. clk = devm_clk_get_optional(dev, "uart1");
  43. if (IS_ERR(clk))
  44. return PTR_ERR(clk);
  45. sbct->clkps[SANDBOX_CLK_TEST_ID_DEVM2] = clk;
  46. sbct->clkps[SANDBOX_CLK_TEST_ID_DEVM_NULL] = NULL;
  47. clk = devm_clk_get_optional(dev, "not_an_existing_clock");
  48. if (IS_ERR(clk))
  49. return PTR_ERR(clk);
  50. if (clk)
  51. return -EINVAL;
  52. return 0;
  53. }
  54. int sandbox_clk_test_get_bulk(struct udevice *dev)
  55. {
  56. struct sandbox_clk_test *sbct = dev_get_priv(dev);
  57. return clk_get_bulk(dev, &sbct->bulk);
  58. }
  59. ulong sandbox_clk_test_get_rate(struct udevice *dev, int id)
  60. {
  61. struct sandbox_clk_test *sbct = dev_get_priv(dev);
  62. if (id < 0 || id >= SANDBOX_CLK_TEST_ID_COUNT)
  63. return -EINVAL;
  64. return clk_get_rate(sbct->clkps[id]);
  65. }
  66. ulong sandbox_clk_test_round_rate(struct udevice *dev, int id, ulong rate)
  67. {
  68. struct sandbox_clk_test *sbct = dev_get_priv(dev);
  69. if (id < 0 || id >= SANDBOX_CLK_TEST_ID_COUNT)
  70. return -EINVAL;
  71. return clk_round_rate(sbct->clkps[id], rate);
  72. }
  73. ulong sandbox_clk_test_set_rate(struct udevice *dev, int id, ulong rate)
  74. {
  75. struct sandbox_clk_test *sbct = dev_get_priv(dev);
  76. if (id < 0 || id >= SANDBOX_CLK_TEST_ID_COUNT)
  77. return -EINVAL;
  78. return clk_set_rate(sbct->clkps[id], rate);
  79. }
  80. int sandbox_clk_test_enable(struct udevice *dev, int id)
  81. {
  82. struct sandbox_clk_test *sbct = dev_get_priv(dev);
  83. if (id < 0 || id >= SANDBOX_CLK_TEST_ID_COUNT)
  84. return -EINVAL;
  85. return clk_enable(sbct->clkps[id]);
  86. }
  87. int sandbox_clk_test_enable_bulk(struct udevice *dev)
  88. {
  89. struct sandbox_clk_test *sbct = dev_get_priv(dev);
  90. return clk_enable_bulk(&sbct->bulk);
  91. }
  92. int sandbox_clk_test_disable(struct udevice *dev, int id)
  93. {
  94. struct sandbox_clk_test *sbct = dev_get_priv(dev);
  95. if (id < 0 || id >= SANDBOX_CLK_TEST_ID_COUNT)
  96. return -EINVAL;
  97. return clk_disable(sbct->clkps[id]);
  98. }
  99. int sandbox_clk_test_disable_bulk(struct udevice *dev)
  100. {
  101. struct sandbox_clk_test *sbct = dev_get_priv(dev);
  102. return clk_disable_bulk(&sbct->bulk);
  103. }
  104. int sandbox_clk_test_free(struct udevice *dev)
  105. {
  106. struct sandbox_clk_test *sbct = dev_get_priv(dev);
  107. int i, ret;
  108. devm_clk_put(dev, sbct->clkps[SANDBOX_CLK_TEST_ID_DEVM1]);
  109. for (i = 0; i < SANDBOX_CLK_TEST_NON_DEVM_COUNT; i++) {
  110. ret = clk_free(&sbct->clks[i]);
  111. if (ret)
  112. return ret;
  113. }
  114. return 0;
  115. }
  116. int sandbox_clk_test_release_bulk(struct udevice *dev)
  117. {
  118. struct sandbox_clk_test *sbct = dev_get_priv(dev);
  119. return clk_release_bulk(&sbct->bulk);
  120. }
  121. int sandbox_clk_test_valid(struct udevice *dev)
  122. {
  123. struct sandbox_clk_test *sbct = dev_get_priv(dev);
  124. int i;
  125. for (i = 0; i < SANDBOX_CLK_TEST_ID_COUNT; i++) {
  126. if (!clk_valid(sbct->clkps[i]))
  127. if (i != SANDBOX_CLK_TEST_ID_DEVM_NULL)
  128. return -EINVAL;
  129. }
  130. return 0;
  131. }
  132. static int sandbox_clk_test_probe(struct udevice *dev)
  133. {
  134. struct sandbox_clk_test *sbct = dev_get_priv(dev);
  135. int i;
  136. for (i = 0; i < SANDBOX_CLK_TEST_ID_DEVM1; i++)
  137. sbct->clkps[i] = &sbct->clks[i];
  138. for (i = SANDBOX_CLK_TEST_ID_DEVM1; i < SANDBOX_CLK_TEST_ID_COUNT; i++)
  139. sbct->clkps[i] = NULL;
  140. return 0;
  141. }
  142. static const struct udevice_id sandbox_clk_test_ids[] = {
  143. { .compatible = "sandbox,clk-test" },
  144. { }
  145. };
  146. U_BOOT_DRIVER(sandbox_clk_test) = {
  147. .name = "sandbox_clk_test",
  148. .id = UCLASS_MISC,
  149. .of_match = sandbox_clk_test_ids,
  150. .probe = sandbox_clk_test_probe,
  151. .priv_auto = sizeof(struct sandbox_clk_test),
  152. };