diff options
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/arm/configs/omap1_defconfig | 1 | ||||
| -rw-r--r-- | arch/arm/mach-omap1/Kconfig | 8 | ||||
| -rw-r--r-- | arch/arm/mach-omap1/clock.h | 3 | ||||
| -rw-r--r-- | arch/arm/mach-omap1/clock_data.c | 53 | ||||
| -rw-r--r-- | arch/arm/mach-omap1/devices.c | 3 |
5 files changed, 39 insertions, 29 deletions
diff --git a/arch/arm/configs/omap1_defconfig b/arch/arm/configs/omap1_defconfig index 7b63462b349d..a7e777581378 100644 --- a/arch/arm/configs/omap1_defconfig +++ b/arch/arm/configs/omap1_defconfig @@ -48,7 +48,6 @@ CONFIG_MACH_SX1=y CONFIG_MACH_NOKIA770=y CONFIG_MACH_AMS_DELTA=y CONFIG_MACH_OMAP_GENERIC=y -CONFIG_OMAP_CLOCKS_SET_BY_BOOTLOADER=y CONFIG_OMAP_ARM_216MHZ=y CONFIG_OMAP_ARM_195MHZ=y CONFIG_OMAP_ARM_192MHZ=y diff --git a/arch/arm/mach-omap1/Kconfig b/arch/arm/mach-omap1/Kconfig index e0a028161dde..73f287d6429b 100644 --- a/arch/arm/mach-omap1/Kconfig +++ b/arch/arm/mach-omap1/Kconfig @@ -171,14 +171,6 @@ config MACH_OMAP_GENERIC comment "OMAP CPU Speed" depends on ARCH_OMAP1 -config OMAP_CLOCKS_SET_BY_BOOTLOADER - bool "OMAP clocks set by bootloader" - depends on ARCH_OMAP1 - help - Enable this option to prevent the kernel from overriding the clock - frequencies programmed by bootloader for MPU, DSP, MMUs, TC, - internal LCD controller and MPU peripherals. - config OMAP_ARM_216MHZ bool "OMAP ARM 216 MHz CPU (1710 only)" depends on ARCH_OMAP1 && ARCH_OMAP16XX diff --git a/arch/arm/mach-omap1/clock.h b/arch/arm/mach-omap1/clock.h index eaf09efb91ca..16b1423b454a 100644 --- a/arch/arm/mach-omap1/clock.h +++ b/arch/arm/mach-omap1/clock.h @@ -17,7 +17,8 @@ #include <plat/clock.h> -extern int __init omap1_clk_init(void); +int omap1_clk_init(void); +void omap1_clk_late_init(void); extern int omap1_clk_enable(struct clk *clk); extern void omap1_clk_disable(struct clk *clk); extern long omap1_clk_round_rate(struct clk *clk, unsigned long rate); diff --git a/arch/arm/mach-omap1/clock_data.c b/arch/arm/mach-omap1/clock_data.c index 92400b9eb69f..1297bb58869c 100644 --- a/arch/arm/mach-omap1/clock_data.c +++ b/arch/arm/mach-omap1/clock_data.c @@ -767,6 +767,15 @@ static struct clk_functions omap1_clk_functions = { .clk_disable_unused = omap1_clk_disable_unused, }; +static void __init omap1_show_rates(void) +{ + pr_notice("Clocking rate (xtal/DPLL1/MPU): " + "%ld.%01ld/%ld.%01ld/%ld.%01ld MHz\n", + ck_ref.rate / 1000000, (ck_ref.rate / 100000) % 10, + ck_dpll1.rate / 1000000, (ck_dpll1.rate / 100000) % 10, + arm_ck.rate / 1000000, (arm_ck.rate / 100000) % 10); +} + int __init omap1_clk_init(void) { struct omap_clk *c; @@ -835,9 +844,12 @@ int __init omap1_clk_init(void) /* We want to be in syncronous scalable mode */ omap_writew(0x1000, ARM_SYSST); -#ifdef CONFIG_OMAP_CLOCKS_SET_BY_BOOTLOADER - /* Use values set by bootloader. Determine PLL rate and recalculate - * dependent clocks as if kernel had changed PLL or divisors. + + /* + * Initially use the values set by bootloader. Determine PLL rate and + * recalculate dependent clocks as if kernel had changed PLL or + * divisors. See also omap1_clk_late_init() that can reprogram dpll1 + * after the SRAM is initialized. */ { unsigned pll_ctl_val = omap_readw(DPLL_CTL); @@ -862,25 +874,10 @@ int __init omap1_clk_init(void) } } } -#else - /* Find the highest supported frequency and enable it */ - if (omap1_select_table_rate(&virtual_ck_mpu, ~0)) { - printk(KERN_ERR "System frequencies not set. Check your config.\n"); - /* Guess sane values (60MHz) */ - omap_writew(0x2290, DPLL_CTL); - omap_writew(cpu_is_omap7xx() ? 0x3005 : 0x1005, ARM_CKCTL); - ck_dpll1.rate = 60000000; - } -#endif propagate_rate(&ck_dpll1); /* Cache rates for clocks connected to ck_ref (not dpll1) */ propagate_rate(&ck_ref); - printk(KERN_INFO "Clocking rate (xtal/DPLL1/MPU): " - "%ld.%01ld/%ld.%01ld/%ld.%01ld MHz\n", - ck_ref.rate / 1000000, (ck_ref.rate / 100000) % 10, - ck_dpll1.rate / 1000000, (ck_dpll1.rate / 100000) % 10, - arm_ck.rate / 1000000, (arm_ck.rate / 100000) % 10); - + omap1_show_rates(); if (machine_is_omap_perseus2() || machine_is_omap_fsample()) { /* Select slicer output as OMAP input clock */ omap_writew(omap_readw(OMAP7XX_PCC_UPLD_CTRL) & ~0x1, @@ -925,3 +922,21 @@ int __init omap1_clk_init(void) return 0; } + +#define OMAP1_DPLL1_SANE_VALUE 60000000 + +void __init omap1_clk_late_init(void) +{ + if (ck_dpll1.rate >= OMAP1_DPLL1_SANE_VALUE) + return; + + /* Find the highest supported frequency and enable it */ + if (omap1_select_table_rate(&virtual_ck_mpu, ~0)) { + pr_err("System frequencies not set, using default. Check your config.\n"); + omap_writew(0x2290, DPLL_CTL); + omap_writew(cpu_is_omap7xx() ? 0x3005 : 0x1005, ARM_CKCTL); + ck_dpll1.rate = OMAP1_DPLL1_SANE_VALUE; + } + propagate_rate(&ck_dpll1); + omap1_show_rates(); +} diff --git a/arch/arm/mach-omap1/devices.c b/arch/arm/mach-omap1/devices.c index 48ef9888e820..475cb2f50d87 100644 --- a/arch/arm/mach-omap1/devices.c +++ b/arch/arm/mach-omap1/devices.c @@ -30,6 +30,8 @@ #include <plat/omap7xx.h> #include <plat/mcbsp.h> +#include "clock.h" + /*-------------------------------------------------------------------------*/ #if defined(CONFIG_RTC_DRV_OMAP) || defined(CONFIG_RTC_DRV_OMAP_MODULE) @@ -293,6 +295,7 @@ static int __init omap1_init_devices(void) return -ENODEV; omap_sram_init(); + omap1_clk_late_init(); /* please keep these calls, and their implementations above, * in alphabetical order so they're easier to sort through. |