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Diffstat (limited to 'qemu/roms/u-boot/arch/arm/cpu/armv7/at91/clock.c')
-rw-r--r--qemu/roms/u-boot/arch/arm/cpu/armv7/at91/clock.c122
1 files changed, 0 insertions, 122 deletions
diff --git a/qemu/roms/u-boot/arch/arm/cpu/armv7/at91/clock.c b/qemu/roms/u-boot/arch/arm/cpu/armv7/at91/clock.c
deleted file mode 100644
index 1588e0c8e..000000000
--- a/qemu/roms/u-boot/arch/arm/cpu/armv7/at91/clock.c
+++ /dev/null
@@ -1,122 +0,0 @@
-/*
- * [origin: Linux kernel linux/arch/arm/mach-at91/clock.c]
- *
- * Copyright (C) 2005 David Brownell
- * Copyright (C) 2005 Ivan Kokshaysky
- * Copyright (C) 2009 Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
- * Copyright (C) 2013 Bo Shen <voice.shen@atmel.com>
- *
- * SPDX-License-Identifier: GPL-2.0+
- */
-
-#include <common.h>
-#include <asm/io.h>
-#include <asm/arch/hardware.h>
-#include <asm/arch/at91_pmc.h>
-#include <asm/arch/clk.h>
-
-#if !defined(CONFIG_AT91FAMILY)
-# error You need to define CONFIG_AT91FAMILY in your board config!
-#endif
-
-DECLARE_GLOBAL_DATA_PTR;
-
-static unsigned long at91_css_to_rate(unsigned long css)
-{
- switch (css) {
- case AT91_PMC_MCKR_CSS_SLOW:
- return CONFIG_SYS_AT91_SLOW_CLOCK;
- case AT91_PMC_MCKR_CSS_MAIN:
- return gd->arch.main_clk_rate_hz;
- case AT91_PMC_MCKR_CSS_PLLA:
- return gd->arch.plla_rate_hz;
- }
-
- return 0;
-}
-
-static u32 at91_pll_rate(u32 freq, u32 reg)
-{
- unsigned mul, div;
-
- div = reg & 0xff;
- mul = (reg >> 18) & 0x7f;
- if (div && mul) {
- freq /= div;
- freq *= mul + 1;
- } else {
- freq = 0;
- }
-
- return freq;
-}
-
-int at91_clock_init(unsigned long main_clock)
-{
- unsigned freq, mckr;
- struct at91_pmc *pmc = (struct at91_pmc *)ATMEL_BASE_PMC;
-#ifndef CONFIG_SYS_AT91_MAIN_CLOCK
- unsigned tmp;
- /*
- * When the bootloader initialized the main oscillator correctly,
- * there's no problem using the cycle counter. But if it didn't,
- * or when using oscillator bypass mode, we must be told the speed
- * of the main clock.
- */
- if (!main_clock) {
- do {
- tmp = readl(&pmc->mcfr);
- } while (!(tmp & AT91_PMC_MCFR_MAINRDY));
- tmp &= AT91_PMC_MCFR_MAINF_MASK;
- main_clock = tmp * (CONFIG_SYS_AT91_SLOW_CLOCK / 16);
- }
-#endif
- gd->arch.main_clk_rate_hz = main_clock;
-
- /* report if PLLA is more than mildly overclocked */
- gd->arch.plla_rate_hz = at91_pll_rate(main_clock, readl(&pmc->pllar));
-
- /*
- * MCK and CPU derive from one of those primary clocks.
- * For now, assume this parentage won't change.
- */
- mckr = readl(&pmc->mckr);
-
- /* plla divisor by 2 */
- if (mckr & (1 << 12))
- gd->arch.plla_rate_hz >>= 1;
-
- gd->arch.mck_rate_hz = at91_css_to_rate(mckr & AT91_PMC_MCKR_CSS_MASK);
- freq = gd->arch.mck_rate_hz;
-
- /* prescale */
- freq >>= mckr & AT91_PMC_MCKR_PRES_MASK;
-
- switch (mckr & AT91_PMC_MCKR_MDIV_MASK) {
- case AT91_PMC_MCKR_MDIV_2:
- gd->arch.mck_rate_hz = freq / 2;
- break;
- case AT91_PMC_MCKR_MDIV_3:
- gd->arch.mck_rate_hz = freq / 3;
- break;
- case AT91_PMC_MCKR_MDIV_4:
- gd->arch.mck_rate_hz = freq / 4;
- break;
- default:
- break;
- }
-
- gd->arch.cpu_clk_rate_hz = freq;
-
- return 0;
-}
-
-void at91_periph_clk_enable(int id)
-{
- struct at91_pmc *pmc = (struct at91_pmc *)ATMEL_BASE_PMC;
-
- if (id > 31)
- writel(1 << (id - 32), &pmc->pcer1);
- else
- writel(1 << id, &pmc->pcer);
-}