mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-07-06 11:16:15 +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>
133 lines
2.8 KiB
C
133 lines
2.8 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright 2004 Freescale Semiconductor.
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* Jeff Brown
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* Srikanth Srinivasan (srikanth.srinivasan@freescale.com)
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*
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* (C) Copyright 2000-2002
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* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
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*/
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#include <common.h>
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#include <mpc86xx.h>
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#include <asm/processor.h>
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#include <asm/io.h>
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DECLARE_GLOBAL_DATA_PTR;
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/* used in some defintiions of CONFIG_SYS_CLK_FREQ */
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extern unsigned long get_board_sys_clk(unsigned long dummy);
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void get_sys_info(sys_info_t *sys_info)
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{
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volatile immap_t *immap = (immap_t *) CONFIG_SYS_IMMR;
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volatile ccsr_gur_t *gur = &immap->im_gur;
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uint plat_ratio, e600_ratio;
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plat_ratio = (gur->porpllsr) & 0x0000003e;
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plat_ratio >>= 1;
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switch (plat_ratio) {
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case 0x0:
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sys_info->freq_systembus = 16 * CONFIG_SYS_CLK_FREQ;
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break;
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case 0x02:
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case 0x03:
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case 0x04:
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case 0x05:
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case 0x06:
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case 0x08:
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case 0x09:
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case 0x0a:
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case 0x0c:
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case 0x10:
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sys_info->freq_systembus = plat_ratio * CONFIG_SYS_CLK_FREQ;
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break;
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default:
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sys_info->freq_systembus = 0;
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break;
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}
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e600_ratio = (gur->porpllsr) & 0x003f0000;
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e600_ratio >>= 16;
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switch (e600_ratio) {
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case 0x10:
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sys_info->freq_processor = 2 * sys_info->freq_systembus;
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break;
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case 0x19:
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sys_info->freq_processor = 5 * sys_info->freq_systembus / 2;
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break;
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case 0x20:
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sys_info->freq_processor = 3 * sys_info->freq_systembus;
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break;
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case 0x39:
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sys_info->freq_processor = 7 * sys_info->freq_systembus / 2;
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break;
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case 0x28:
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sys_info->freq_processor = 4 * sys_info->freq_systembus;
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break;
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case 0x1d:
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sys_info->freq_processor = 9 * sys_info->freq_systembus / 2;
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break;
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default:
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sys_info->freq_processor = e600_ratio +
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sys_info->freq_systembus;
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break;
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}
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sys_info->freq_localbus = sys_info->freq_systembus;
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}
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/*
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* Measure CPU clock speed (core clock GCLK1, GCLK2)
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* (Approx. GCLK frequency in Hz)
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*/
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int get_clocks(void)
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{
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sys_info_t sys_info;
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get_sys_info(&sys_info);
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gd->cpu_clk = sys_info.freq_processor;
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gd->bus_clk = sys_info.freq_systembus;
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gd->arch.lbc_clk = sys_info.freq_localbus;
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/*
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* The base clock for I2C depends on the actual SOC. Unfortunately,
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* there is no pattern that can be used to determine the frequency, so
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* the only choice is to look up the actual SOC number and use the value
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* for that SOC. This information is taken from application note
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* AN2919.
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*/
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#ifdef CONFIG_ARCH_MPC8610
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gd->arch.i2c1_clk = sys_info.freq_systembus;
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#else
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gd->arch.i2c1_clk = sys_info.freq_systembus / 2;
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#endif
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gd->arch.i2c2_clk = gd->arch.i2c1_clk;
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if (gd->cpu_clk != 0)
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return 0;
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else
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return 1;
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}
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/*
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* get_bus_freq
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* Return system bus freq in Hz
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*/
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ulong get_bus_freq(ulong dummy)
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{
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ulong val;
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sys_info_t sys_info;
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get_sys_info(&sys_info);
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val = sys_info.freq_systembus;
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return val;
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}
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