dspsys-gate.c 4.3 KB

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  1. /* SPDX-License-Identifier: GPL-2.0 */
  2. /*
  3. * Copyright (C) 2022 Alibaba Group Holding Limited.
  4. */
  5. #include <dt-bindings/clock/light-dspsys.h>
  6. #include <linux/clk.h>
  7. #include <linux/err.h>
  8. #include <linux/init.h>
  9. #include <linux/io.h>
  10. #include <linux/module.h>
  11. #include <linux/mfd/syscon.h>
  12. #include <linux/of.h>
  13. #include <linux/of_device.h>
  14. #include <linux/of_address.h>
  15. #include <linux/platform_device.h>
  16. #include <linux/types.h>
  17. #include "clk-gate.h"
  18. #include "../clk.h"
  19. static struct clk *gates[LIGHT_CLKGEN_DSPSYS_CLK_END];
  20. static struct clk_onecell_data clk_gate_data;
  21. static int light_dspsys_clk_probe(struct platform_device *pdev)
  22. {
  23. struct regmap *dspsys_regmap, *tee_dspsys_regmap;
  24. struct device *dev = &pdev->dev;
  25. struct device_node *np = dev->of_node;
  26. int ret;
  27. dspsys_regmap = syscon_regmap_lookup_by_phandle(np, "dspsys-regmap");
  28. if (IS_ERR(dspsys_regmap)) {
  29. dev_err(&pdev->dev, "cannot find regmap for dsp system register\n");
  30. return PTR_ERR(dspsys_regmap);
  31. }
  32. tee_dspsys_regmap = syscon_regmap_lookup_by_phandle(np, "tee-dspsys-regmap");
  33. if (IS_ERR(tee_dspsys_regmap)) {
  34. dev_warn(&pdev->dev, "cannot find regmap for tee dsp system register\n");
  35. tee_dspsys_regmap = NULL;
  36. }
  37. gates[CLKGEN_DSP0_PCLK] = thead_gate_clk_register("clkgen_dsp0_pclk", NULL, dspsys_regmap,
  38. 0x24, 0, GATE_NOT_SHARED, NULL, dev);
  39. gates[CLKGEN_DSP1_PCLK] = thead_gate_clk_register("clkgen_dsp1_pclk", NULL, dspsys_regmap,
  40. 0x24, 1, GATE_NOT_SHARED, NULL, dev);
  41. gates[CLKGEN_DSP1_CCLK] = thead_gate_clk_register("clkgen_dsp1_cclk", NULL, dspsys_regmap,
  42. 0x24, 2, GATE_NOT_SHARED, NULL, dev);
  43. gates[CLKGEN_DSP0_CCLK] = thead_gate_clk_register("clkgen_dsp0_cclk", NULL, dspsys_regmap,
  44. 0x24, 3, GATE_NOT_SHARED, NULL, dev);
  45. gates[CLKGEN_X2X_DSP2_ACLK_S] = thead_gate_clk_register("clkgen_x2x_dsp2_aclk_s", NULL, dspsys_regmap,
  46. 0x24, 4, GATE_NOT_SHARED, NULL, dev);
  47. gates[CLKGEN_X2X_DSP0_ACLK_S] = thead_gate_clk_register("clkgen_x2x_dsp0_aclk_s", NULL, dspsys_regmap,
  48. 0x24, 5, GATE_NOT_SHARED, NULL, dev);
  49. gates[CLKGEN_X2X_X4_DSPSLV_DSP1_ACLK_M] = thead_gate_clk_register("clkgen_x2x_x4_dspslv_dsp1_aclk_m",
  50. NULL, dspsys_regmap, 0x24, 6, GATE_NOT_SHARED, NULL, dev);
  51. gates[CLKGEN_X2X_X4_DSPSLV_DSP0_ACLK_M] = thead_gate_clk_register("clkgen_x2x_x4_dspslv_dsp0_aclk_m",
  52. NULL, dspsys_regmap, 0x24, 7, GATE_NOT_SHARED, NULL, dev);
  53. gates[CLKGEN_AXI4_DSPSYS_SLV_ACLK] = thead_gate_clk_register("clkgen_axi4_dspsys_slv_aclk", NULL, dspsys_regmap,
  54. 0x24, 20, GATE_NOT_SHARED, NULL, dev);
  55. gates[CLKGEN_AXI4_DSPSYS_SLV_PCLK] = thead_gate_clk_register("clkgen_axi4_dspsys_slv_pclk", NULL, dspsys_regmap,
  56. 0x24, 21, GATE_NOT_SHARED, NULL, dev);
  57. gates[CLKGEN_AXI4_DSPSYS_ACLK] = thead_gate_clk_register("clkgen_axi4_dspsys_aclk", NULL, dspsys_regmap,
  58. 0x24, 23, GATE_NOT_SHARED, NULL, dev);
  59. gates[CLKGEN_AXI4_DSPSYS_PCLK] = thead_gate_clk_register("clkgen_axi4_dspsys_pclk", NULL, dspsys_regmap,
  60. 0x24, 24, GATE_NOT_SHARED, NULL, dev);
  61. if (tee_dspsys_regmap) {
  62. gates[CLKGEN_IOPMP_DSP1_PCLK] = thead_gate_clk_register("clkgen_iopmp_dsp1_pclk", NULL, tee_dspsys_regmap,
  63. 0x24, 25, GATE_NOT_SHARED, NULL, dev);
  64. gates[CLKGEN_IOPMP_DSP0_PCLK] = thead_gate_clk_register("clkgen_iopmp_dsp0_pclk", NULL, tee_dspsys_regmap,
  65. 0x24, 26, GATE_NOT_SHARED, NULL, dev);
  66. }
  67. clk_gate_data.clks = gates;
  68. clk_gate_data.clk_num = ARRAY_SIZE(gates);
  69. ret = of_clk_add_provider(np, of_clk_src_onecell_get, &clk_gate_data);
  70. if (ret < 0) {
  71. dev_err(dev, "failed to register gate clks for light dspsys\n");
  72. goto unregister_clks;
  73. }
  74. dev_info(dev, "succeed to register dspsys gate clock provider\n");
  75. return 0;
  76. unregister_clks:
  77. thead_unregister_clocks(gates, ARRAY_SIZE(gates));
  78. return ret;
  79. }
  80. static const struct of_device_id dspsys_clk_gate_of_match[] = {
  81. { .compatible = "thead,dspsys-gate-controller" },
  82. { /* sentinel */ },
  83. };
  84. MODULE_DEVICE_TABLE(of, dspsys_clk_gate_of_match);
  85. static struct platform_driver light_dspsys_clk_driver = {
  86. .probe = light_dspsys_clk_probe,
  87. .driver = {
  88. .name = "dspsys-clk-gate-provider",
  89. .of_match_table = of_match_ptr(dspsys_clk_gate_of_match),
  90. },
  91. };
  92. module_platform_driver(light_dspsys_clk_driver);
  93. MODULE_AUTHOR("wei.liu <lw312886@linux.alibaba.com>");
  94. MODULE_DESCRIPTION("Thead Light Fullmask dspsys clock gate provider");
  95. MODULE_LICENSE("GPL v2");