LXR uboot/arch/powerpc/cpu/mpc512x/diu.c

   1/*
   2 * Copyright 2008 Freescale Semiconductor, Inc.
   3 * York Sun <yorksun@freescale.com>
   4 *
   5 * FSL DIU Framebuffer driver
   6 *
   7 * SPDX-License-Identifier:     GPL-2.0+
   8 */
   9
  10#include <common.h>
  11#include <command.h>
  12#include <asm/io.h>
  13
  14#include <fsl_diu_fb.h>
  15
  16DECLARE_GLOBAL_DATA_PTR;
  17
  18void diu_set_pixel_clock(unsigned int pixclock)
  19{
  20        volatile immap_t *immap = (immap_t *)CONFIG_SYS_IMMR;
  21        volatile clk512x_t *clk = &immap->clk;
  22        volatile unsigned int *clkdvdr = &clk->scfr[0];
  23        unsigned long speed_ccb, temp, pixval;
  24
  25        speed_ccb = get_bus_freq(0) * 4;
  26        temp = 1000000000/pixclock;
  27        temp *= 1000;
  28        pixval = speed_ccb / temp;
  29        debug("DIU pixval = %lu\n", pixval);
  30
  31        /* Modify PXCLK in GUTS CLKDVDR */
  32        debug("DIU: Current value of CLKDVDR = 0x%08x\n", in_be32(clkdvdr));
  33        temp = in_be32(clkdvdr) & 0xFFFFFF00;
  34        out_be32(clkdvdr, temp | (pixval & 0xFF));
  35        debug("DIU: Modified value of CLKDVDR = 0x%08x\n", in_be32(clkdvdr));
  36}
  37
  38int platform_diu_init(unsigned int xres, unsigned int yres, const char *port)
  39{
  40        unsigned int pixel_format = 0x88883316;
  41
  42        debug("mpc5121_diu_init\n");
  43        return fsl_diu_init(xres, yres, pixel_format, 0);
  44}
  45