dcu.c 864 B

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  1. // SPDX-License-Identifier: GPL-2.0+
  2. /*
  3. * Copyright 2017 Toradex AG
  4. *
  5. * FSL DCU platform driver
  6. */
  7. #include <asm/arch/crm_regs.h>
  8. #include <asm/io.h>
  9. #include <common.h>
  10. #include <fsl_dcu_fb.h>
  11. #include "div64.h"
  12. unsigned int dcu_set_pixel_clock(unsigned int pixclock)
  13. {
  14. struct ccm_reg *ccm = (struct ccm_reg *)CCM_BASE_ADDR;
  15. unsigned long long div;
  16. clrbits_le32(&ccm->cscmr1, CCM_CSCMR1_DCU0_CLK_SEL);
  17. clrsetbits_le32(&ccm->cscdr3,
  18. CCM_CSCDR3_DCU0_DIV_MASK | CCM_CSCDR3_DCU0_EN,
  19. CCM_CSCDR3_DCU0_DIV(0) | CCM_CSCDR3_DCU0_EN);
  20. div = (unsigned long long)(PLL1_PFD2_FREQ / 1000);
  21. do_div(div, pixclock);
  22. return div;
  23. }
  24. int platform_dcu_init(struct fb_info *fbinfo,
  25. unsigned int xres,
  26. unsigned int yres,
  27. const char *port,
  28. struct fb_videomode *dcu_fb_videomode)
  29. {
  30. fsl_dcu_init(fbinfo, xres, yres, 32);
  31. return 0;
  32. }