clk_sandbox_test.c 4.2 KB

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