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/*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*/
#include <common.h>
#include <asm/arch/imx-regs.h>
#include <asm/arch/clock.h>
#include <init.h>
#ifndef CLK32
#define CLK32 32000
#endif
static ulong clk_in_32k(void)
{
return 1024 * CLK32;
}
static ulong clk_in_26m(void)
{
if (CSCR & CSCR_OSC26M_DIV1P5) {
/* divide by 1.5 */
return 26000000 / 1.5;
} else {
/* divide by 1 */
return 26000000;
}
}
ulong imx_get_mpllclk(void)
{
ulong cscr = CSCR;
ulong fref;
if (cscr & CSCR_MCU_SEL)
fref = clk_in_26m();
else
fref = clk_in_32k();
return imx_decode_pll(MPCTL0, fref);
}
ulong imx_get_armclk(void)
{
ulong cscr = CSCR;
ulong fref = imx_get_mpllclk();
ulong div;
if (!(cscr & CSCR_ARM_SRC_MPLL))
fref = (fref * 2) / 3;
div = ((cscr >> 12) & 0x3) + 1;
return fref / div;
}
ulong imx_get_ahbclk(void)
{
ulong cscr = CSCR;
ulong fref = imx_get_mpllclk();
ulong div;
div = ((cscr >> 8) & 0x3) + 1;
return fref / div;
}
ulong imx_get_spllclk(void)
{
ulong cscr = CSCR;
ulong fref;
if (cscr & CSCR_SP_SEL)
fref = clk_in_26m();
else
fref = clk_in_32k();
return imx_decode_pll(SPCTL0, fref);
}
static ulong imx_decode_perclk(ulong div)
{
return (imx_get_mpllclk() * 2) / (div * 3);
}
ulong imx_get_perclk1(void)
{
return imx_decode_perclk((PCDR1 & 0x3f) + 1);
}
ulong imx_get_perclk2(void)
{
return imx_decode_perclk(((PCDR1 >> 8) & 0x3f) + 1);
}
ulong imx_get_perclk3(void)
{
return imx_decode_perclk(((PCDR1 >> 16) & 0x3f) + 1);
}
ulong imx_get_perclk4(void)
{
return imx_decode_perclk(((PCDR1 >> 24) & 0x3f) + 1);
}
int imx_dump_clocks(void)
{
printf("mpll: %10d\n", imx_get_mpllclk());
printf("arm: %10d\n", imx_get_armclk());
printf("system: %10d\n", imx_get_spllclk());
printf("perclk1: %10d\n", imx_get_perclk1());
printf("perclk2: %10d\n", imx_get_perclk2());
printf("perclk3: %10d\n", imx_get_perclk3());
printf("perclk4: %10d\n", imx_get_perclk4());
printf("clkin26: %10d\n", clk_in_26m());
return 0;
}
late_initcall(imx_dump_clocks);
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