mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-24 05:04:00 +08:00
bbc6fac387
fsl_get_immr() uses /soc/ranges to determine the immr. mpc885_get_clock() transforms a crystal frequency into a system frequency according to the PLL register settings. pq2_get_clocks() does the same as the above for the PowerQUICC II, except that it produces several different clocks. The mpc8xx/pq2 set_clocks() functions modify common properties in the device tree based on the given clock data. The mpc885/pq2 fixup_clocks() functions call get_clocks(), and pass the results to set_clocks(). Signed-off-by: Scott Wood <scottwood@freescale.com> Acked-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
58 lines
1.1 KiB
C
58 lines
1.1 KiB
C
/*
|
|
* Freescale SOC support functions
|
|
*
|
|
* Author: Scott Wood <scottwood@freescale.com>
|
|
*
|
|
* Copyright (c) 2007 Freescale Semiconductor, Inc.
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify it
|
|
* under the terms of the GNU General Public License version 2 as published
|
|
* by the Free Software Foundation.
|
|
*/
|
|
|
|
#include "ops.h"
|
|
#include "types.h"
|
|
#include "fsl-soc.h"
|
|
#include "stdio.h"
|
|
|
|
static u32 prop_buf[MAX_PROP_LEN / 4];
|
|
|
|
u32 *fsl_get_immr(void)
|
|
{
|
|
void *soc;
|
|
unsigned long ret = 0;
|
|
|
|
soc = find_node_by_devtype(NULL, "soc");
|
|
if (soc) {
|
|
int size;
|
|
u32 naddr;
|
|
|
|
size = getprop(soc, "#address-cells", prop_buf, MAX_PROP_LEN);
|
|
if (size == 4)
|
|
naddr = prop_buf[0];
|
|
else
|
|
naddr = 2;
|
|
|
|
if (naddr != 1 && naddr != 2)
|
|
goto err;
|
|
|
|
size = getprop(soc, "ranges", prop_buf, MAX_PROP_LEN);
|
|
|
|
if (size < 12)
|
|
goto err;
|
|
if (prop_buf[0] != 0)
|
|
goto err;
|
|
if (naddr == 2 && prop_buf[1] != 0)
|
|
goto err;
|
|
|
|
if (!dt_xlate_addr(soc, prop_buf + naddr, 8, &ret))
|
|
ret = 0;
|
|
}
|
|
|
|
err:
|
|
if (!ret)
|
|
printf("fsl_get_immr: Failed to find immr base\r\n");
|
|
|
|
return (u32 *)ret;
|
|
}
|