mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-07-27 21:33:44 +09:00
83d290c56f
When U-Boot started using SPDX tags we were among the early adopters and there weren't a lot of other examples to borrow from. So we picked the area of the file that usually had a full license text and replaced it with an appropriate SPDX-License-Identifier: entry. Since then, the Linux Kernel has adopted SPDX tags and they place it as the very first line in a file (except where shebangs are used, then it's second line) and with slightly different comment styles than us. In part due to community overlap, in part due to better tag visibility and in part for other minor reasons, switch over to that style. This commit changes all instances where we have a single declared license in the tag as both the before and after are identical in tag contents. There's also a few places where I found we did not have a tag and have introduced one. Signed-off-by: Tom Rini <trini@konsulko.com>
86 lines
1.8 KiB
C
86 lines
1.8 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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*
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* (c) 2004 Sascha Hauer <sascha@saschahauer.de>
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*/
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#include <common.h>
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#if defined (CONFIG_IMX)
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#include <asm/arch/imx-regs.h>
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/* ------------------------------------------------------------------------- */
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/* NOTE: This describes the proper use of this file.
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*
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* CONFIG_SYS_CLK_FREQ should be defined as the input frequency of the PLL.
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* SH FIXME: 16780000 in our case
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* get_FCLK(), get_HCLK(), get_PCLK() and get_UCLK() return the clock of
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* the specified bus in HZ.
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*/
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/* ------------------------------------------------------------------------- */
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ulong get_systemPLLCLK(void)
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{
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/* FIXME: We assume System_SEL = 0 here */
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u32 spctl0 = SPCTL0;
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u32 mfi = (spctl0 >> 10) & 0xf;
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u32 mfn = spctl0 & 0x3f;
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u32 mfd = (spctl0 >> 16) & 0x3f;
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u32 pd = (spctl0 >> 26) & 0xf;
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mfi = mfi<=5 ? 5 : mfi;
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return (2*(CONFIG_SYSPLL_CLK_FREQ>>10)*( (mfi<<10) + (mfn<<10)/(mfd+1)))/(pd+1);
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}
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ulong get_mcuPLLCLK(void)
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{
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/* FIXME: We assume System_SEL = 0 here */
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u32 mpctl0 = MPCTL0;
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u32 mfi = (mpctl0 >> 10) & 0xf;
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u32 mfn = mpctl0 & 0x3f;
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u32 mfd = (mpctl0 >> 16) & 0x3f;
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u32 pd = (mpctl0 >> 26) & 0xf;
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mfi = mfi<=5 ? 5 : mfi;
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return (2*(CONFIG_SYS_CLK_FREQ>>10)*( (mfi<<10) + (mfn<<10)/(mfd+1)))/(pd+1);
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}
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ulong get_FCLK(void)
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{
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return (( CSCR>>15)&1) ? get_mcuPLLCLK()>>1 : get_mcuPLLCLK();
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}
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/* return HCLK frequency */
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ulong get_HCLK(void)
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{
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u32 bclkdiv = (( CSCR >> 10 ) & 0xf) + 1;
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printf("bclkdiv: %d\n", bclkdiv);
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return get_systemPLLCLK() / bclkdiv;
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}
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/* return BCLK frequency */
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ulong get_BCLK(void)
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{
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return get_HCLK();
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}
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ulong get_PERCLK1(void)
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{
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return get_systemPLLCLK() / (((PCDR) & 0xf)+1);
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}
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ulong get_PERCLK2(void)
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{
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return get_systemPLLCLK() / (((PCDR>>4) & 0xf)+1);
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}
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ulong get_PERCLK3(void)
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{
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return get_systemPLLCLK() / (((PCDR>>16) & 0x7f)+1);
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}
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#endif /* defined (CONFIG_IMX) */
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