84 lines
2.0 KiB
C
84 lines
2.0 KiB
C
/*
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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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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*/
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#include <common.h>
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#include <asm/io.h>
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#include <mach/imx-regs.h>
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#include <mach/clock.h>
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#include <init.h>
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ulong imx_get_mpl_dpdgck_clk(void)
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{
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ulong infreq;
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if ((readl(IMX_CCM_BASE + CCM_CCMR) & CCMR_PRCS_MASK) == CCMR_FPM)
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infreq = CONFIG_MX31_CLK32 * 1024;
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else
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infreq = CONFIG_MX31_HCLK_FREQ;
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return imx_decode_pll(readl(IMX_CCM_BASE + CCM_MPCTL), infreq);
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}
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ulong imx_get_mcu_main_clk(void)
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{
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/* For now we assume mpl_dpdgck_clk == mcu_main_clk
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* which should be correct for most boards
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*/
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return imx_get_mpl_dpdgck_clk();
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}
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/**
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* Calculate the current pixel clock speed (aka HSP or IPU)
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* @return 0 on failure or current frequency in Hz
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*/
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ulong imx_get_lcdclk(void)
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{
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ulong hsp_podf = (readl(IMX_CCM_BASE + CCM_PDR0) >> 11) & 0x03;
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ulong base_clk = imx_get_mcu_main_clk();
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return base_clk / (hsp_podf + 1);
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}
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ulong imx_get_perclk1(void)
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{
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u32 freq = imx_get_mcu_main_clk();
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u32 pdr0 = readl(IMX_CCM_BASE + CCM_PDR0);
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freq /= ((pdr0 >> 3) & 0x7) + 1;
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freq /= ((pdr0 >> 6) & 0x3) + 1;
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return freq;
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}
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void imx_dump_clocks(void)
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{
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ulong cpufreq = imx_get_mcu_main_clk();
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printf("mx31 cpu clock: %dMHz\n",cpufreq / 1000000);
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printf("ipg clock : %dHz\n", imx_get_perclk1());
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}
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ulong imx_get_uartclk(void)
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{
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return imx_get_perclk1();
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}
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ulong imx_get_gptclk(void)
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{
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return imx_get_perclk1();
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}
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