// SPDX-License-Identifier: GPL-2.0+ /* * Copyright (C) 2004 Texas Instruments. * Copyright (C) 2009 David Brownell */ #include <common.h> #include <clock_legacy.h> #include <init.h> #include <asm/arch/hardware.h> #include <asm/global_data.h> #include <asm/io.h> DECLARE_GLOBAL_DATA_PTR; /* offsets from PLL controller base */ #define PLLC_PLLCTL 0x100 #define PLLC_PLLM 0x110 #define PLLC_PREDIV 0x114 #define PLLC_PLLDIV1 0x118 #define PLLC_PLLDIV2 0x11c #define PLLC_PLLDIV3 0x120 #define PLLC_POSTDIV 0x128 #define PLLC_BPDIV 0x12c #define PLLC_PLLDIV4 0x160 #define PLLC_PLLDIV5 0x164 #define PLLC_PLLDIV6 0x168 #define PLLC_PLLDIV7 0x16c #define PLLC_PLLDIV8 0x170 #define PLLC_PLLDIV9 0x174 unsigned int sysdiv[9] = { PLLC_PLLDIV1, PLLC_PLLDIV2, PLLC_PLLDIV3, PLLC_PLLDIV4, PLLC_PLLDIV5, PLLC_PLLDIV6, PLLC_PLLDIV7, PLLC_PLLDIV8, PLLC_PLLDIV9 }; int clk_get(enum davinci_clk_ids id) { int pre_div; int pllm; int post_div; int pll_out; unsigned int pll_base; pll_out = CONFIG_SYS_OSCIN_FREQ; if (id == DAVINCI_AUXCLK_CLKID) goto out; if ((id >> 16) == 1) pll_base = (unsigned int)davinci_pllc1_regs; else pll_base = (unsigned int)davinci_pllc0_regs; id &= 0xFFFF; /* * Lets keep this simple. Combining operations can result in * unexpected approximations */ pre_div = (readl(pll_base + PLLC_PREDIV) & DAVINCI_PLLC_DIV_MASK) + 1; pllm = readl(pll_base + PLLC_PLLM) + 1; pll_out /= pre_div; pll_out *= pllm; if (id == DAVINCI_PLLM_CLKID) goto out; post_div = (readl(pll_base + PLLC_POSTDIV) & DAVINCI_PLLC_DIV_MASK) + 1; pll_out /= post_div; if (id == DAVINCI_PLLC_CLKID) goto out; pll_out /= (readl(pll_base + sysdiv[id - 1]) & DAVINCI_PLLC_DIV_MASK) + 1; out: return pll_out; } int set_cpu_clk_info(void) { gd->bd->bi_arm_freq = clk_get(DAVINCI_ARM_CLKID) / 1000000; /* DDR PHY uses an x2 input clock */ gd->bd->bi_ddr_freq = cpu_is_da830() ? 0 : (clk_get(DAVINCI_DDR_CLKID) / 1000000); gd->bd->bi_dsp_freq = 0; return 0; } unsigned long get_board_sys_clk(void) { return clk_get(DAVINCI_ARM_CLKID); }