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- // SPDX-License-Identifier: GPL-2.0+
- /*
- *
- * (c) 2004 Sascha Hauer <sascha@saschahauer.de>
- */
- #include <common.h>
- #if defined (CONFIG_IMX)
- #include <asm/arch/imx-regs.h>
- /* ------------------------------------------------------------------------- */
- /* NOTE: This describes the proper use of this file.
- *
- * CONFIG_SYS_CLK_FREQ should be defined as the input frequency of the PLL.
- * SH FIXME: 16780000 in our case
- * get_FCLK(), get_HCLK(), get_PCLK() and get_UCLK() return the clock of
- * the specified bus in HZ.
- */
- /* ------------------------------------------------------------------------- */
- ulong get_systemPLLCLK(void)
- {
- /* FIXME: We assume System_SEL = 0 here */
- u32 spctl0 = SPCTL0;
- u32 mfi = (spctl0 >> 10) & 0xf;
- u32 mfn = spctl0 & 0x3f;
- u32 mfd = (spctl0 >> 16) & 0x3f;
- u32 pd = (spctl0 >> 26) & 0xf;
- mfi = mfi<=5 ? 5 : mfi;
- return (2*(CONFIG_SYSPLL_CLK_FREQ>>10)*( (mfi<<10) + (mfn<<10)/(mfd+1)))/(pd+1);
- }
- ulong get_mcuPLLCLK(void)
- {
- /* FIXME: We assume System_SEL = 0 here */
- u32 mpctl0 = MPCTL0;
- u32 mfi = (mpctl0 >> 10) & 0xf;
- u32 mfn = mpctl0 & 0x3f;
- u32 mfd = (mpctl0 >> 16) & 0x3f;
- u32 pd = (mpctl0 >> 26) & 0xf;
- mfi = mfi<=5 ? 5 : mfi;
- return (2*(CONFIG_SYS_CLK_FREQ>>10)*( (mfi<<10) + (mfn<<10)/(mfd+1)))/(pd+1);
- }
- ulong get_FCLK(void)
- {
- return (( CSCR>>15)&1) ? get_mcuPLLCLK()>>1 : get_mcuPLLCLK();
- }
- /* return HCLK frequency */
- ulong get_HCLK(void)
- {
- u32 bclkdiv = (( CSCR >> 10 ) & 0xf) + 1;
- printf("bclkdiv: %d\n", bclkdiv);
- return get_systemPLLCLK() / bclkdiv;
- }
- /* return BCLK frequency */
- ulong get_BCLK(void)
- {
- return get_HCLK();
- }
- ulong get_PERCLK1(void)
- {
- return get_systemPLLCLK() / (((PCDR) & 0xf)+1);
- }
- ulong get_PERCLK2(void)
- {
- return get_systemPLLCLK() / (((PCDR>>4) & 0xf)+1);
- }
- ulong get_PERCLK3(void)
- {
- return get_systemPLLCLK() / (((PCDR>>16) & 0x7f)+1);
- }
- #endif /* defined (CONFIG_IMX) */
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