diff options
| -rw-r--r-- | cpu/at32ap/at32ap700x/Makefile | 2 | ||||
| -rw-r--r-- | cpu/at32ap/at32ap700x/clk.c | 68 | ||||
| -rw-r--r-- | cpu/at32ap/at32ap700x/sm.h (renamed from cpu/at32ap/sm.h) | 0 | ||||
| -rw-r--r-- | cpu/at32ap/cpu.c | 48 | ||||
| -rw-r--r-- | include/asm-avr32/arch-at32ap700x/clk.h | 2 |
5 files changed, 76 insertions, 44 deletions
diff --git a/cpu/at32ap/at32ap700x/Makefile b/cpu/at32ap/at32ap700x/Makefile index d276712..7404235 100644 --- a/cpu/at32ap/at32ap700x/Makefile +++ b/cpu/at32ap/at32ap700x/Makefile @@ -24,7 +24,7 @@ include $(TOPDIR)/config.mk LIB := $(obj)lib$(SOC).a -COBJS := gpio.o +COBJS := gpio.o clk.o SRCS := $(SOBJS:.o=.S) $(COBJS:.o=.c) OBJS := $(addprefix $(obj),$(SOBJS) $(COBJS)) diff --git a/cpu/at32ap/at32ap700x/clk.c b/cpu/at32ap/at32ap700x/clk.c new file mode 100644 index 0000000..b3aa034 --- /dev/null +++ b/cpu/at32ap/at32ap700x/clk.c @@ -0,0 +1,68 @@ +/* + * Copyright (C) 2005-2008 Atmel Corporation + * + * See file CREDITS for list of people who contributed to this + * project. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; either version 2 of + * the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, + * MA 02111-1307 USA + */ +#include <common.h> + +#include <asm/io.h> + +#include <asm/arch/clk.h> +#include <asm/arch/memory-map.h> + +#include "sm.h" + +void clk_init(void) +{ + uint32_t cksel; + + /* in case of soft resets, disable watchdog */ + sm_writel(WDT_CTRL, SM_BF(KEY, 0x55)); + sm_writel(WDT_CTRL, SM_BF(KEY, 0xaa)); + +#ifdef CONFIG_PLL + /* Initialize the PLL */ + sm_writel(PM_PLL0, (SM_BF(PLLCOUNT, CFG_PLL0_SUPPRESS_CYCLES) + | SM_BF(PLLMUL, CFG_PLL0_MUL - 1) + | SM_BF(PLLDIV, CFG_PLL0_DIV - 1) + | SM_BF(PLLOPT, CFG_PLL0_OPT) + | SM_BF(PLLOSC, 0) + | SM_BIT(PLLEN))); + + /* Wait for lock */ + while (!(sm_readl(PM_ISR) & SM_BIT(LOCK0))) ; +#endif + + /* Set up clocks for the CPU and all peripheral buses */ + cksel = 0; + if (CFG_CLKDIV_CPU) + cksel |= SM_BIT(CPUDIV) | SM_BF(CPUSEL, CFG_CLKDIV_CPU - 1); + if (CFG_CLKDIV_HSB) + cksel |= SM_BIT(HSBDIV) | SM_BF(HSBSEL, CFG_CLKDIV_HSB - 1); + if (CFG_CLKDIV_PBA) + cksel |= SM_BIT(PBADIV) | SM_BF(PBASEL, CFG_CLKDIV_PBA - 1); + if (CFG_CLKDIV_PBB) + cksel |= SM_BIT(PBBDIV) | SM_BF(PBBSEL, CFG_CLKDIV_PBB - 1); + sm_writel(PM_CKSEL, cksel); + +#ifdef CONFIG_PLL + /* Use PLL0 as main clock */ + sm_writel(PM_MCCTRL, SM_BIT(PLLSEL)); +#endif +} diff --git a/cpu/at32ap/sm.h b/cpu/at32ap/at32ap700x/sm.h index 6492c8e..6492c8e 100644 --- a/cpu/at32ap/sm.h +++ b/cpu/at32ap/at32ap700x/sm.h diff --git a/cpu/at32ap/cpu.c b/cpu/at32ap/cpu.c index a7a66cc..0ba8361 100644 --- a/cpu/at32ap/cpu.c +++ b/cpu/at32ap/cpu.c @@ -30,7 +30,6 @@ #include <asm/arch/memory-map.h> #include "hsmc3.h" -#include "sm.h" /* Sanity checks */ #if (CFG_CLKDIV_CPU > CFG_CLKDIV_HSB) \ @@ -44,51 +43,10 @@ DECLARE_GLOBAL_DATA_PTR; -static void pm_init(void) -{ - uint32_t cksel; - -#ifdef CONFIG_PLL - /* Initialize the PLL */ - sm_writel(PM_PLL0, (SM_BF(PLLCOUNT, CFG_PLL0_SUPPRESS_CYCLES) - | SM_BF(PLLMUL, CFG_PLL0_MUL - 1) - | SM_BF(PLLDIV, CFG_PLL0_DIV - 1) - | SM_BF(PLLOPT, CFG_PLL0_OPT) - | SM_BF(PLLOSC, 0) - | SM_BIT(PLLEN))); - - /* Wait for lock */ - while (!(sm_readl(PM_ISR) & SM_BIT(LOCK0))) ; -#endif - - /* Set up clocks for the CPU and all peripheral buses */ - cksel = 0; - if (CFG_CLKDIV_CPU) - cksel |= SM_BIT(CPUDIV) | SM_BF(CPUSEL, CFG_CLKDIV_CPU - 1); - if (CFG_CLKDIV_HSB) - cksel |= SM_BIT(HSBDIV) | SM_BF(HSBSEL, CFG_CLKDIV_HSB - 1); - if (CFG_CLKDIV_PBA) - cksel |= SM_BIT(PBADIV) | SM_BF(PBASEL, CFG_CLKDIV_PBA - 1); - if (CFG_CLKDIV_PBB) - cksel |= SM_BIT(PBBDIV) | SM_BF(PBBSEL, CFG_CLKDIV_PBB - 1); - sm_writel(PM_CKSEL, cksel); - - gd->cpu_hz = get_cpu_clk_rate(); - -#ifdef CONFIG_PLL - /* Use PLL0 as main clock */ - sm_writel(PM_MCCTRL, SM_BIT(PLLSEL)); -#endif -} - int cpu_init(void) { extern void _evba(void); - /* in case of soft resets, disable watchdog */ - sm_writel(WDT_CTRL, SM_BF(KEY, 0x55)); - sm_writel(WDT_CTRL, SM_BF(KEY, 0xaa)); - gd->cpu_hz = CFG_OSC0_HZ; /* TODO: Move somewhere else, but needs to be run before we @@ -98,8 +56,12 @@ int cpu_init(void) hsmc3_writel(PULSE0, 0x0b0a0906); hsmc3_writel(SETUP0, 0x00010002); - pm_init(); + clk_init(); + + /* Update the CPU speed according to the PLL configuration */ + gd->cpu_hz = get_cpu_clk_rate(); + /* Set up the exception handler table and enable exceptions */ sysreg_write(EVBA, (unsigned long)&_evba); asm volatile("csrf %0" : : "i"(SYSREG_EM_OFFSET)); diff --git a/include/asm-avr32/arch-at32ap700x/clk.h b/include/asm-avr32/arch-at32ap700x/clk.h index 309fda5..4a1dd33 100644 --- a/include/asm-avr32/arch-at32ap700x/clk.h +++ b/include/asm-avr32/arch-at32ap700x/clk.h @@ -75,6 +75,8 @@ static inline unsigned long get_mci_clk_rate(void) } #endif +extern void clk_init(void); + /* Board code may need the SDRAM base clock as a compile-time constant */ #define SDRAMC_BUS_HZ (MAIN_CLK_RATE >> CFG_CLKDIV_HSB) |