board/toradex/colibri_vf/dcu.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * Copyright 2017 Toradex AG
   4  *
   5  * FSL DCU platform driver
   6  */
   7
   8 #include <asm/arch/crm_regs.h>
   9 #include <asm/io.h>
  10 #include <common.h>
  11 #include <fsl_dcu_fb.h>
  12 #include "div64.h"
  13
  14 unsigned int dcu_set_pixel_clock(unsigned int pixclock)
  15 {
  16         struct ccm_reg *ccm = (struct ccm_reg *)CCM_BASE_ADDR;
  17         unsigned long long div;
  18
  19         clrbits_le32(&ccm->cscmr1, CCM_CSCMR1_DCU0_CLK_SEL);
  20         clrsetbits_le32(&ccm->cscdr3,
  21                         CCM_CSCDR3_DCU0_DIV_MASK | CCM_CSCDR3_DCU0_EN,
  22                         CCM_CSCDR3_DCU0_DIV(0) | CCM_CSCDR3_DCU0_EN);
  23         div = (unsigned long long)(PLL1_PFD2_FREQ / 1000);
  24         do_div(div, pixclock);
  25
  26         return div;
  27 }
  28
  29 int platform_dcu_init(unsigned int xres, unsigned int yres,
  30                       const char *port,
  31                       struct fb_videomode *dcu_fb_videomode)
  32 {
  33         fsl_dcu_init(xres, yres, 32);
  34
  35         return 0;
  36 }