2 * Copyright 2008 Freescale Semiconductor, Inc.
3 * York Sun <yorksun@freescale.com>
5 * FSL DIU Framebuffer driver
7 * See file CREDITS for list of people who contributed to this
10 * This program is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU General Public License as
12 * published by the Free Software Foundation; either version 2 of
13 * the License, or (at your option) any later version.
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
30 #include <fsl_diu_fb.h>
32 DECLARE_GLOBAL_DATA_PTR;
34 void diu_set_pixel_clock(unsigned int pixclock)
36 volatile immap_t *immap = (immap_t *)CONFIG_SYS_IMMR;
37 volatile clk512x_t *clk = &immap->clk;
38 volatile unsigned int *clkdvdr = &clk->scfr[0];
39 unsigned long speed_ccb, temp, pixval;
41 speed_ccb = get_bus_freq(0) * 4;
42 temp = 1000000000/pixclock;
44 pixval = speed_ccb / temp;
45 debug("DIU pixval = %lu\n", pixval);
47 /* Modify PXCLK in GUTS CLKDVDR */
48 debug("DIU: Current value of CLKDVDR = 0x%08x\n", in_be32(clkdvdr));
49 temp = in_be32(clkdvdr) & 0xFFFFFF00;
50 out_be32(clkdvdr, temp | (pixval & 0xFF));
51 debug("DIU: Modified value of CLKDVDR = 0x%08x\n", in_be32(clkdvdr));
54 int platform_diu_init(unsigned int xres, unsigned int yres, const char *port)
56 unsigned int pixel_format = 0x88883316;
58 debug("mpc5121_diu_init\n");
59 return fsl_diu_init(xres, yres, pixel_format, 0);