62 lines
1.7 KiB
C
62 lines
1.7 KiB
C
/*
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* Copyright (C) 2012 Alexey Galakhov
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*
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* Based on code from u-boot found somewhere on the web
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* that seems to originate from Samsung
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#include <config.h>
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#include <common.h>
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#include <io.h>
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#include <init.h>
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#include <mach/s3c-iomap.h>
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#include <mach/s3c-clocks.h>
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#include <mach/s3c-generic.h>
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#ifdef CONFIG_S3C_PLL_INIT
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void __bare_init s5p_init_pll(void)
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{
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uint32_t reg;
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int i;
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/* Set Mux to FIN */
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writel(0, S5P_CLK_SRC0);
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writel(BOARD_APLL_LOCKTIME, S5P_xPLL_LOCK + S5P_APLL);
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/* Disable PLL */
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writel(0, S5P_xPLL_CON + S5P_APLL);
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writel(0, S5P_xPLL_CON + S5P_MPLL);
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/* Set up dividers */
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reg = readl(S5P_CLK_DIV0);
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reg &= ~(BOARD_CLK_DIV0_MASK);
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reg |= (BOARD_CLK_DIV0_VAL);
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writel(reg, S5P_CLK_DIV0);
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/* Set up PLLs */
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writel(BOARD_APLL_VAL, S5P_xPLL_CON + S5P_APLL);
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writel(BOARD_MPLL_VAL, S5P_xPLL_CON + S5P_MPLL);
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writel(BOARD_EPLL_VAL, S5P_xPLL_CON + S5P_EPLL);
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writel(BOARD_VPLL_VAL, S5P_xPLL_CON + S5P_VPLL);
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/* Wait for sync */
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for (i = 0; i < 0x10000; ++i)
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barrier();
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reg = readl(S5P_CLK_SRC0);
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reg |= 0x1111; /* switch MUX to PLL outputs */
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writel(reg, S5P_CLK_SRC0);
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}
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#endif /* CONFIG_S3C_PLL_INIT */
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