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
dcu_set_pixel_clock(unsigned int pixclock)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
platform_dcu_init(unsigned int xres,unsigned int yres,const char * port,struct fb_videomode * dcu_fb_videomode)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 }
37