clk-imx1.c 3.2 KB

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  1. // SPDX-License-Identifier: GPL-2.0-only
  2. /*
  3. * Copyright (C) 2008 Sascha Hauer <s.hauer@pengutronix.de>, Pengutronix
  4. */
  5. #include <linux/clkdev.h>
  6. #include <linux/clk-provider.h>
  7. #include <linux/err.h>
  8. #include <linux/init.h>
  9. #include <linux/of.h>
  10. #include <linux/of_address.h>
  11. #include <dt-bindings/clock/imx1-clock.h>
  12. #include <soc/imx/timer.h>
  13. #include <asm/irq.h>
  14. #include "clk.h"
  15. #define MX1_CCM_BASE_ADDR 0x0021b000
  16. #define MX1_TIM1_BASE_ADDR 0x00220000
  17. #define MX1_TIM1_INT (NR_IRQS_LEGACY + 59)
  18. static const char *prem_sel_clks[] = { "clk32_premult", "clk16m", };
  19. static const char *clko_sel_clks[] = { "per1", "hclk", "clk48m", "clk16m",
  20. "prem", "fclk", };
  21. static struct clk *clk[IMX1_CLK_MAX];
  22. static struct clk_onecell_data clk_data;
  23. static void __iomem *ccm __initdata;
  24. #define CCM_CSCR (ccm + 0x0000)
  25. #define CCM_MPCTL0 (ccm + 0x0004)
  26. #define CCM_SPCTL0 (ccm + 0x000c)
  27. #define CCM_PCDR (ccm + 0x0020)
  28. #define SCM_GCCR (ccm + 0x0810)
  29. static void __init mx1_clocks_init_dt(struct device_node *np)
  30. {
  31. ccm = of_iomap(np, 0);
  32. BUG_ON(!ccm);
  33. clk[IMX1_CLK_DUMMY] = imx_clk_fixed("dummy", 0);
  34. clk[IMX1_CLK_CLK32] = imx_obtain_fixed_clock("clk32", 32768);
  35. clk[IMX1_CLK_CLK16M_EXT] = imx_clk_fixed("clk16m_ext", 16000000);
  36. clk[IMX1_CLK_CLK16M] = imx_clk_gate("clk16m", "clk16m_ext", CCM_CSCR, 17);
  37. clk[IMX1_CLK_CLK32_PREMULT] = imx_clk_fixed_factor("clk32_premult", "clk32", 512, 1);
  38. clk[IMX1_CLK_PREM] = imx_clk_mux("prem", CCM_CSCR, 16, 1, prem_sel_clks, ARRAY_SIZE(prem_sel_clks));
  39. clk[IMX1_CLK_MPLL] = imx_clk_pllv1(IMX_PLLV1_IMX1, "mpll", "clk32_premult", CCM_MPCTL0);
  40. clk[IMX1_CLK_MPLL_GATE] = imx_clk_gate("mpll_gate", "mpll", CCM_CSCR, 0);
  41. clk[IMX1_CLK_SPLL] = imx_clk_pllv1(IMX_PLLV1_IMX1, "spll", "prem", CCM_SPCTL0);
  42. clk[IMX1_CLK_SPLL_GATE] = imx_clk_gate("spll_gate", "spll", CCM_CSCR, 1);
  43. clk[IMX1_CLK_MCU] = imx_clk_divider("mcu", "clk32_premult", CCM_CSCR, 15, 1);
  44. clk[IMX1_CLK_FCLK] = imx_clk_divider("fclk", "mpll_gate", CCM_CSCR, 15, 1);
  45. clk[IMX1_CLK_HCLK] = imx_clk_divider("hclk", "spll_gate", CCM_CSCR, 10, 4);
  46. clk[IMX1_CLK_CLK48M] = imx_clk_divider("clk48m", "spll_gate", CCM_CSCR, 26, 3);
  47. clk[IMX1_CLK_PER1] = imx_clk_divider("per1", "spll_gate", CCM_PCDR, 0, 4);
  48. clk[IMX1_CLK_PER2] = imx_clk_divider("per2", "spll_gate", CCM_PCDR, 4, 4);
  49. clk[IMX1_CLK_PER3] = imx_clk_divider("per3", "spll_gate", CCM_PCDR, 16, 7);
  50. clk[IMX1_CLK_CLKO] = imx_clk_mux("clko", CCM_CSCR, 29, 3, clko_sel_clks, ARRAY_SIZE(clko_sel_clks));
  51. clk[IMX1_CLK_UART3_GATE] = imx_clk_gate("uart3_gate", "hclk", SCM_GCCR, 6);
  52. clk[IMX1_CLK_SSI2_GATE] = imx_clk_gate("ssi2_gate", "hclk", SCM_GCCR, 5);
  53. clk[IMX1_CLK_BROM_GATE] = imx_clk_gate("brom_gate", "hclk", SCM_GCCR, 4);
  54. clk[IMX1_CLK_DMA_GATE] = imx_clk_gate("dma_gate", "hclk", SCM_GCCR, 3);
  55. clk[IMX1_CLK_CSI_GATE] = imx_clk_gate("csi_gate", "hclk", SCM_GCCR, 2);
  56. clk[IMX1_CLK_MMA_GATE] = imx_clk_gate("mma_gate", "hclk", SCM_GCCR, 1);
  57. clk[IMX1_CLK_USBD_GATE] = imx_clk_gate("usbd_gate", "clk48m", SCM_GCCR, 0);
  58. imx_check_clocks(clk, ARRAY_SIZE(clk));
  59. clk_data.clks = clk;
  60. clk_data.clk_num = ARRAY_SIZE(clk);
  61. of_clk_add_provider(np, of_clk_src_onecell_get, &clk_data);
  62. }
  63. CLK_OF_DECLARE(imx1_ccm, "fsl,imx1-ccm", mx1_clocks_init_dt);