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https://github.com/AsahiLinux/u-boot
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be7d257895
For the DA8xx family of SoCs, the set_cpu_clk_info() function was not initialising the DSP frequency, leading to 'bdinfo' command output such as: [...snip...] ARM frequency = 300 MHz DSP frequency = -536870913 MHz DDR frequency = 300 MHz This commit provides a separate implementation of set_cpu_clk_info() for the DA8xx SoCs that initialises the DSP frequency to zero (since currently the DSP is not enabled by U-Boot on any DA8xx platform). The separate implementation is justified because there is no common code between DA8xx and the other SoC families. It is now much easier to understand the flow of the two separate functions. Signed-off-by: Laurence Withers <lwithers@guralp.com> Cc: Tom Rini <trini@ti.com> Cc: Hadli, Manjunath <manjunath.hadli@ti.com> Cc: Heiko Schocher <hs@denx.de>
238 lines
5.5 KiB
C
238 lines
5.5 KiB
C
/*
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* Copyright (C) 2004 Texas Instruments.
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* Copyright (C) 2009 David Brownell
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*
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* See file CREDITS for list of people who contributed to this
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* project.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (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., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include <common.h>
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#include <netdev.h>
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#include <asm/arch/hardware.h>
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#include <asm/io.h>
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DECLARE_GLOBAL_DATA_PTR;
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/* offsets from PLL controller base */
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#define PLLC_PLLCTL 0x100
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#define PLLC_PLLM 0x110
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#define PLLC_PREDIV 0x114
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#define PLLC_PLLDIV1 0x118
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#define PLLC_PLLDIV2 0x11c
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#define PLLC_PLLDIV3 0x120
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#define PLLC_POSTDIV 0x128
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#define PLLC_BPDIV 0x12c
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#define PLLC_PLLDIV4 0x160
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#define PLLC_PLLDIV5 0x164
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#define PLLC_PLLDIV6 0x168
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#define PLLC_PLLDIV7 0x16c
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#define PLLC_PLLDIV8 0x170
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#define PLLC_PLLDIV9 0x174
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#define BIT(x) (1 << (x))
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/* SOC-specific pll info */
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#ifdef CONFIG_SOC_DM355
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#define ARM_PLLDIV PLLC_PLLDIV1
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#define DDR_PLLDIV PLLC_PLLDIV1
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#endif
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#ifdef CONFIG_SOC_DM644X
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#define ARM_PLLDIV PLLC_PLLDIV2
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#define DSP_PLLDIV PLLC_PLLDIV1
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#define DDR_PLLDIV PLLC_PLLDIV2
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#endif
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#ifdef CONFIG_SOC_DM646X
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#define DSP_PLLDIV PLLC_PLLDIV1
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#define ARM_PLLDIV PLLC_PLLDIV2
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#define DDR_PLLDIV PLLC_PLLDIV1
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#endif
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#ifdef CONFIG_SOC_DA8XX
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unsigned int sysdiv[9] = {
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PLLC_PLLDIV1, PLLC_PLLDIV2, PLLC_PLLDIV3, PLLC_PLLDIV4, PLLC_PLLDIV5,
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PLLC_PLLDIV6, PLLC_PLLDIV7, PLLC_PLLDIV8, PLLC_PLLDIV9
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};
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int clk_get(enum davinci_clk_ids id)
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{
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int pre_div;
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int pllm;
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int post_div;
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int pll_out;
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unsigned int pll_base;
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pll_out = CONFIG_SYS_OSCIN_FREQ;
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if (id == DAVINCI_AUXCLK_CLKID)
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goto out;
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if ((id >> 16) == 1)
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pll_base = (unsigned int)davinci_pllc1_regs;
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else
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pll_base = (unsigned int)davinci_pllc0_regs;
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id &= 0xFFFF;
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/*
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* Lets keep this simple. Combining operations can result in
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* unexpected approximations
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*/
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pre_div = (readl(pll_base + PLLC_PREDIV) &
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DAVINCI_PLLC_DIV_MASK) + 1;
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pllm = readl(pll_base + PLLC_PLLM) + 1;
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pll_out /= pre_div;
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pll_out *= pllm;
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if (id == DAVINCI_PLLM_CLKID)
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goto out;
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post_div = (readl(pll_base + PLLC_POSTDIV) &
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DAVINCI_PLLC_DIV_MASK) + 1;
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pll_out /= post_div;
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if (id == DAVINCI_PLLC_CLKID)
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goto out;
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pll_out /= (readl(pll_base + sysdiv[id - 1]) &
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DAVINCI_PLLC_DIV_MASK) + 1;
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out:
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return pll_out;
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}
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int set_cpu_clk_info(void)
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{
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gd->bd->bi_arm_freq = clk_get(DAVINCI_ARM_CLKID) / 1000000;
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/* DDR PHY uses an x2 input clock */
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gd->bd->bi_ddr_freq = cpu_is_da830() ? 0 :
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(clk_get(DAVINCI_DDR_CLKID) / 1000000);
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gd->bd->bi_dsp_freq = 0;
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return 0;
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}
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#else /* CONFIG_SOC_DA8XX */
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static unsigned pll_div(volatile void *pllbase, unsigned offset)
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{
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u32 div;
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div = REG(pllbase + offset);
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return (div & BIT(15)) ? (1 + (div & 0x1f)) : 1;
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}
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static inline unsigned pll_prediv(volatile void *pllbase)
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{
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#ifdef CONFIG_SOC_DM355
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/* this register read seems to fail on pll0 */
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if (pllbase == (volatile void *)DAVINCI_PLL_CNTRL0_BASE)
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return 8;
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else
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return pll_div(pllbase, PLLC_PREDIV);
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#elif defined(CONFIG_SOC_DM365)
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return pll_div(pllbase, PLLC_PREDIV);
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#endif
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return 1;
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}
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static inline unsigned pll_postdiv(volatile void *pllbase)
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{
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#if defined(CONFIG_SOC_DM355) || defined(CONFIG_SOC_DM365)
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return pll_div(pllbase, PLLC_POSTDIV);
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#elif defined(CONFIG_SOC_DM6446)
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if (pllbase == (volatile void *)DAVINCI_PLL_CNTRL0_BASE)
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return pll_div(pllbase, PLLC_POSTDIV);
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#endif
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return 1;
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}
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static unsigned pll_sysclk_mhz(unsigned pll_addr, unsigned div)
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{
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volatile void *pllbase = (volatile void *) pll_addr;
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#ifdef CONFIG_SOC_DM646X
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unsigned base = CONFIG_REFCLK_FREQ / 1000;
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#else
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unsigned base = CONFIG_SYS_HZ_CLOCK / 1000;
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#endif
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/* the PLL might be bypassed */
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if (readl(pllbase + PLLC_PLLCTL) & BIT(0)) {
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base /= pll_prediv(pllbase);
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#if defined(CONFIG_SOC_DM365)
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base *= 2 * (readl(pllbase + PLLC_PLLM) & 0x0ff);
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#else
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base *= 1 + (REG(pllbase + PLLC_PLLM) & 0x0ff);
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#endif
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base /= pll_postdiv(pllbase);
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}
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return DIV_ROUND_UP(base, 1000 * pll_div(pllbase, div));
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}
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#ifdef DAVINCI_DM6467EVM
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unsigned int davinci_arm_clk_get()
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{
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return pll_sysclk_mhz(DAVINCI_PLL_CNTRL0_BASE, ARM_PLLDIV) * 1000000;
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}
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#endif
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#if defined(CONFIG_SOC_DM365)
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unsigned int davinci_clk_get(unsigned int div)
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{
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return pll_sysclk_mhz(DAVINCI_PLL_CNTRL0_BASE, div) * 1000000;
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}
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#endif
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int set_cpu_clk_info(void)
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{
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unsigned int pllbase = DAVINCI_PLL_CNTRL0_BASE;
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#if defined(CONFIG_SOC_DM365)
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pllbase = DAVINCI_PLL_CNTRL1_BASE;
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#endif
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gd->bd->bi_arm_freq = pll_sysclk_mhz(pllbase, ARM_PLLDIV);
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#ifdef DSP_PLLDIV
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gd->bd->bi_dsp_freq =
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pll_sysclk_mhz(DAVINCI_PLL_CNTRL0_BASE, DSP_PLLDIV);
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#else
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gd->bd->bi_dsp_freq = 0;
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#endif
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pllbase = DAVINCI_PLL_CNTRL1_BASE;
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#if defined(CONFIG_SOC_DM365)
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pllbase = DAVINCI_PLL_CNTRL0_BASE;
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#endif
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gd->bd->bi_ddr_freq = pll_sysclk_mhz(pllbase, DDR_PLLDIV) / 2;
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return 0;
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}
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#endif /* !CONFIG_SOC_DA8XX */
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/*
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* Initializes on-chip ethernet controllers.
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* to override, implement board_eth_init()
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*/
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int cpu_eth_init(bd_t *bis)
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{
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#if defined(CONFIG_DRIVER_TI_EMAC)
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davinci_emac_initialize();
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#endif
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return 0;
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}
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