git.sur5r.net Git - u-boot/blob - board/toradex/colibri_vf/dcu.c

   1 /*
   2  * Copyright 2017 Toradex AG
   3  *
   4  * FSL DCU platform driver
   5  * SPDX-License-Identifier:     GPL-2.0+
   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 DECLARE_GLOBAL_DATA_PTR;
  15
  16 unsigned int dcu_set_pixel_clock(unsigned int pixclock)
  17 {
  18         struct ccm_reg *ccm = (struct ccm_reg *)CCM_BASE_ADDR;
  19         unsigned long long div;
  20
  21         clrbits_le32(&ccm->cscmr1, CCM_CSCMR1_DCU0_CLK_SEL);
  22         clrsetbits_le32(&ccm->cscdr3,
  23                         CCM_CSCDR3_DCU0_DIV_MASK | CCM_CSCDR3_DCU0_EN,
  24                         CCM_CSCDR3_DCU0_DIV(0) | CCM_CSCDR3_DCU0_EN);
  25         div = (unsigned long long)(PLL1_PFD2_FREQ / 1000);
  26         do_div(div, pixclock);
  27
  28         return div;
  29 }
  30
  31 int platform_dcu_init(unsigned int xres, unsigned int yres,
  32                       const char *port,
  33                       struct fb_videomode *dcu_fb_videomode)
  34 {
  35         fsl_dcu_init(xres, yres, 32);
  36
  37         return 0;
  38 }