/*
* P1022 RDK board specific routines
*
* Copyright 2012 Freescale Semiconductor , Inc .
*
* Author : Timur Tabi < timur @ freescale . com >
*
* Based on p1022_ds . c
*
* This file is licensed under the terms of the GNU General Public License
* version 2 . This program is licensed " as is " without any warranty of any
* kind , whether express or implied .
*/
#include <linux/fsl/guts.h>
#include <linux/pci.h>
#include <linux/of.h>
#include <linux/of_address.h>
#include <asm /div64.h>
#include <asm /mpic.h>
#include <asm /swiotlb.h>
#include <sysdev/fsl_soc.h>
#include <sysdev/fsl_pci.h>
#include <asm /udbg.h>
#include "smp.h"
#include "mpc85xx.h"
#if defined (CONFIG_FB_FSL_DIU) || defined (CONFIG_FB_FSL_DIU_MODULE)
/* DIU Pixel Clock bits of the CLKDVDR Global Utilities register */
#define CLKDVDR_PXCKEN 0 x80000000
#define CLKDVDR_PXCKINV 0 x10000000
#define CLKDVDR_PXCKDLY 0 x06000000
#define CLKDVDR_PXCLK_MASK 0 x00FF0000
/**
* p1022rdk_set_pixel_clock : program the DIU ' s clock
*
* @ pixclock : the wavelength , in picoseconds , of the clock
*/
static void p1022rdk_set_pixel_clock(unsigned int pixclock)
{
struct device_node *guts_np = NULL;
struct ccsr_guts __iomem *guts;
unsigned long freq;
u64 temp;
u32 pxclk;
/* Map the global utilities registers. */
guts_np = of_find_compatible_node(NULL, NULL, "fsl,p1022-guts" );
if (!guts_np) {
pr_err("p1022rdk: missing global utilities device node\n" );
return ;
}
guts = of_iomap(guts_np, 0 );
of_node_put(guts_np);
if (!guts) {
pr_err("p1022rdk: could not map global utilities device\n" );
return ;
}
/* Convert pixclock from a wavelength to a frequency */
temp = 1000000000000 ULL;
do_div(temp, pixclock);
freq = temp;
/*
* ' pxclk ' is the ratio of the platform clock to the pixel clock .
* This number is programmed into the CLKDVDR register , and the valid
* range of values is 2 - 255 .
*/
pxclk = DIV_ROUND_CLOSEST(fsl_get_sys_freq(), freq);
pxclk = clamp_t(u32, pxclk, 2 , 255 );
/* Disable the pixel clock, and set it to non-inverted and no delay */
clrbits32(&guts->clkdvdr,
CLKDVDR_PXCKEN | CLKDVDR_PXCKDLY | CLKDVDR_PXCLK_MASK);
/* Enable the clock and set the pxclk */
setbits32(&guts->clkdvdr, CLKDVDR_PXCKEN | (pxclk << 16 ));
iounmap(guts);
}
/**
* p1022rdk_valid_monitor_port : set the monitor port for sysfs
*/
static enum fsl_diu_monitor_port
p1022rdk_valid_monitor_port(enum fsl_diu_monitor_port port)
{
return FSL_DIU_PORT_DVI;
}
#endif
static void __init p1022_rdk_pic_init(void )
{
struct mpic *mpic = mpic_alloc(NULL, 0 , MPIC_BIG_ENDIAN |
MPIC_SINGLE_DEST_CPU,
0 , 256 , " OpenPIC " );
BUG_ON(mpic == NULL);
mpic_init(mpic);
}
/*
* Setup the architecture
*/
static void __init p1022_rdk_setup_arch(void )
{
if (ppc_md.progress)
ppc_md.progress("p1022_rdk_setup_arch()" , 0 );
#if defined (CONFIG_FB_FSL_DIU) || defined (CONFIG_FB_FSL_DIU_MODULE)
diu_ops.set_pixel_clock = p1022rdk_set_pixel_clock;
diu_ops.valid_monitor_port = p1022rdk_valid_monitor_port;
#endif
mpc85xx_smp_init();
fsl_pci_assign_primary();
swiotlb_detect_4g();
pr_info("Freescale / iVeia P1022 RDK reference board\n" );
}
machine_arch_initcall(p1022_rdk, mpc85xx_common_publish_devices);
define_machine(p1022_rdk) {
.name = "P1022 RDK" ,
.compatible = "fsl,p1022rdk" ,
.setup_arch = p1022_rdk_setup_arch,
.init_IRQ = p1022_rdk_pic_init,
#ifdef CONFIG_PCI
.pcibios_fixup_bus = fsl_pcibios_fixup_bus,
.pcibios_fixup_phb = fsl_pcibios_fixup_phb,
#endif
.get_irq = mpic_get_irq,
.progress = udbg_progress,
};
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(vorverarbeitet am 2026-09-27)
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