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Librem5
uboot-imx
Commits
a2f34be7
Commit
a2f34be7
authored
Dec 27, 2003
by
wdenk
Browse files
Cleanup
parent
7cb22f97
Changes
1
Hide whitespace changes
Inline
Side-by-side
cpu/mips/incaip_clock.c
View file @
a2f34be7
...
...
@@ -40,33 +40,28 @@
* frequency of the CPU. Don't use the macros, which are set to init the CPU
* frequency in the ROM code.
*/
uint
incaip_get_cpuclk
(
void
)
uint
incaip_get_cpuclk
(
void
)
{
/*-------------------------------------------------------------------------*/
/* CPU Clock Input Multiplexer (MUX I) */
/* Multiplexer MUX I selects the maximum input clock to the CPU. */
/*-------------------------------------------------------------------------*/
if
(
*
((
volatile
ulong
*
)
INCA_IP_CGU_CGU_MUXCR
)
&
INCA_IP_CGU_CGU_MUXCR_MUXI
)
{
/* MUX I set to 150 MHz clock */
return
150000000
;
}
else
{
/* MUX I set to 100/133 MHz clock */
if
(
*
((
volatile
ulong
*
)
INCA_IP_CGU_CGU_DIVCR
)
&
0x40
)
{
/* Division value is 1/3, maximum CPU operating */
/* frequency is 133.3 MHz */
return
130000000
;
}
else
{
/* Division value is 1/4, maximum CPU operating */
/* frequency is 100 MHz */
return
100000000
;
}
}
/*-------------------------------------------------------------------------*/
/* CPU Clock Input Multiplexer (MUX I) */
/* Multiplexer MUX I selects the maximum input clock to the CPU. */
/*-------------------------------------------------------------------------*/
if
(
*
((
volatile
ulong
*
)
INCA_IP_CGU_CGU_MUXCR
)
&
INCA_IP_CGU_CGU_MUXCR_MUXI
)
{
/* MUX I set to 150 MHz clock */
return
150000000
;
}
else
{
/* MUX I set to 100/133 MHz clock */
if
(
*
((
volatile
ulong
*
)
INCA_IP_CGU_CGU_DIVCR
)
&
0x40
)
{
/* Division value is 1/3, maximum CPU operating */
/* frequency is 133.3 MHz */
return
130000000
;
}
else
{
/* Division value is 1/4, maximum CPU operating */
/* frequency is 100 MHz */
return
100000000
;
}
}
}
/*******************************************************************************
...
...
@@ -83,36 +78,36 @@ uint incaip_get_cpuclk(void)
* frequency in the ROM code.
* The calculation for the
*/
uint
incaip_get_fpiclk
(
void
)
uint
incaip_get_fpiclk
(
void
)
{
uint
clkCPU
;
uint
clkCPU
;
clkCPU
=
incaip_get_cpuclk
();
clkCPU
=
incaip_get_cpuclk
();
switch
(
*
((
volatile
ulong
*
)
INCA_IP_CGU_CGU_DIVCR
)
&
0xC
)
{
case
0x4
:
return
clkCPU
>>
1
;
/* devided by 2 */
break
;
case
0x8
:
return
clkCPU
>>
2
;
/* devided by 4 */
break
;
default:
return
clkCPU
;
break
;
}
switch
(
*
((
volatile
ulong
*
)
INCA_IP_CGU_CGU_DIVCR
)
&
0xC
)
{
case
0x4
:
return
clkCPU
>>
1
;
/* devided by 2 */
break
;
case
0x8
:
return
clkCPU
>>
2
;
/* devided by 4 */
break
;
default:
return
clkCPU
;
break
;
}
}
int
incaip_set_cpuclk
(
void
)
int
incaip_set_cpuclk
(
void
)
{
extern
void
ebu_init
(
long
);
extern
void
cgu_init
(
long
);
uchar
tmp
[
64
];
ulong
cpuclk
;
if
(
getenv_r
(
"cpuclk"
,
tmp
,
sizeof
(
tmp
))
>
0
)
{
cpuclk
=
simple_strtoul
(
tmp
,
NULL
,
10
)
*
1000000
;
ebu_init
(
cpuclk
);
cgu_init
(
cpuclk
);
if
(
getenv_r
(
"cpuclk"
,
tmp
,
sizeof
(
tmp
))
>
0
)
{
cpuclk
=
simple_strtoul
(
tmp
,
NULL
,
10
)
*
1000000
;
ebu_init
(
cpuclk
);
cgu_init
(
cpuclk
);
}
return
0
;
...
...
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