diff options
Diffstat (limited to 'arch/arm/mach-omap1')
| -rw-r--r-- | arch/arm/mach-omap1/Makefile | 3 | ||||
| -rw-r--r-- | arch/arm/mach-omap1/include/mach/debug-macro.S | 9 | ||||
| -rw-r--r-- | arch/arm/mach-omap1/omap1-cpufreq.c | 176 | ||||
| -rw-r--r-- | arch/arm/mach-omap1/pm.h | 6 | ||||
| -rw-r--r-- | arch/arm/mach-omap1/sleep.S | 3 | ||||
| -rw-r--r-- | arch/arm/mach-omap1/sram.S | 1 |
6 files changed, 192 insertions, 6 deletions
diff --git a/arch/arm/mach-omap1/Makefile b/arch/arm/mach-omap1/Makefile index ba6009f2767..cb2d3a64858 100644 --- a/arch/arm/mach-omap1/Makefile +++ b/arch/arm/mach-omap1/Makefile @@ -10,6 +10,9 @@ obj-$(CONFIG_OMAP_MCBSP) += mcbsp.o obj-$(CONFIG_OMAP_32K_TIMER) += timer32k.o +# CPUFREQ driver +obj-$(CONFIG_CPU_FREQ) += omap1-cpufreq.o + # Power Management obj-$(CONFIG_PM) += pm.o sleep.o pm_bus.o diff --git a/arch/arm/mach-omap1/include/mach/debug-macro.S b/arch/arm/mach-omap1/include/mach/debug-macro.S index 6a0fa046236..62856044eb6 100644 --- a/arch/arm/mach-omap1/include/mach/debug-macro.S +++ b/arch/arm/mach-omap1/include/mach/debug-macro.S @@ -17,6 +17,9 @@ #include <plat/serial.h> +#define omap_uart_v2p(x) ((x) - PAGE_OFFSET + PLAT_PHYS_OFFSET) +#define omap_uart_p2v(x) ((x) - PLAT_PHYS_OFFSET + PAGE_OFFSET) + .pushsection .data omap_uart_phys: .word 0x0 omap_uart_virt: .word 0x0 @@ -33,7 +36,7 @@ omap_uart_virt: .word 0x0 /* Use omap_uart_phys/virt if already configured */ 9: mrc p15, 0, \rp, c1, c0 tst \rp, #1 @ MMU enabled? - ldreq \rp, =__virt_to_phys(omap_uart_phys) @ MMU not enabled + ldreq \rp, =omap_uart_v2p(omap_uart_phys) @ MMU disabled ldrne \rp, =omap_uart_phys @ MMU enabled add \rv, \rp, #4 @ omap_uart_virt ldr \rp, [\rp, #0] @@ -46,7 +49,7 @@ omap_uart_virt: .word 0x0 mrc p15, 0, \rp, c1, c0 tst \rp, #1 @ MMU enabled? ldreq \rp, =OMAP_UART_INFO @ MMU not enabled - ldrne \rp, =__phys_to_virt(OMAP_UART_INFO) @ MMU enabled + ldrne \rp, =omap_uart_p2v(OMAP_UART_INFO) @ MMU enabled ldr \rp, [\rp, #0] /* Select the UART to use based on the UART1 scratchpad value */ @@ -73,7 +76,7 @@ omap_uart_virt: .word 0x0 98: add \rp, \rp, #0xff000000 @ phys base mrc p15, 0, \rv, c1, c0 tst \rv, #1 @ MMU enabled? - ldreq \rv, =__virt_to_phys(omap_uart_phys) @ MMU not enabled + ldreq \rv, =omap_uart_v2p(omap_uart_phys) @ MMU disabled ldrne \rv, =omap_uart_phys @ MMU enabled str \rp, [\rv, #0] sub \rp, \rp, #0xff000000 @ phys base diff --git a/arch/arm/mach-omap1/omap1-cpufreq.c b/arch/arm/mach-omap1/omap1-cpufreq.c new file mode 100644 index 00000000000..64faf3f28d9 --- /dev/null +++ b/arch/arm/mach-omap1/omap1-cpufreq.c @@ -0,0 +1,176 @@ +/* + * OMAP1 cpufreq driver + * + * CPU frequency scaling for OMAP + * + * Copyright (C) 2005 Nokia Corporation + * Written by Tony Lindgren <tony@atomide.com> + * + * Based on cpu-sa1110.c, Copyright (C) 2001 Russell King + * + * Copyright (C) 2007-2008 Texas Instruments, Inc. + * Updated to support OMAP3 + * Rajendra Nayak <rnayak@ti.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ +#include <linux/types.h> +#include <linux/kernel.h> +#include <linux/sched.h> +#include <linux/cpufreq.h> +#include <linux/delay.h> +#include <linux/init.h> +#include <linux/err.h> +#include <linux/clk.h> +#include <linux/io.h> +#include <linux/opp.h> + +#include <asm/system.h> + +#include <plat/clock.h> +#include <plat/omap-pm.h> + +#include <mach/hardware.h> + +#define VERY_HI_RATE 900000000 + +static struct cpufreq_frequency_table *freq_table; +static struct clk *mpu_clk; + +static int omap_verify_speed(struct cpufreq_policy *policy) +{ + if (freq_table) + return cpufreq_frequency_table_verify(policy, freq_table); + + if (policy->cpu) + return -EINVAL; + + cpufreq_verify_within_limits(policy, policy->cpuinfo.min_freq, + policy->cpuinfo.max_freq); + + policy->min = clk_round_rate(mpu_clk, policy->min * 1000) / 1000; + policy->max = clk_round_rate(mpu_clk, policy->max * 1000) / 1000; + cpufreq_verify_within_limits(policy, policy->cpuinfo.min_freq, + policy->cpuinfo.max_freq); + return 0; +} + +static unsigned int omap_getspeed(unsigned int cpu) +{ + unsigned long rate; + + if (cpu) + return 0; + + rate = clk_get_rate(mpu_clk) / 1000; + return rate; +} + +static int omap_target(struct cpufreq_policy *policy, + unsigned int target_freq, + unsigned int relation) +{ + struct cpufreq_freqs freqs; + int ret = 0; + + /* Ensure desired rate is within allowed range. Some govenors + * (ondemand) will just pass target_freq=0 to get the minimum. */ + if (target_freq < policy->min) + target_freq = policy->min; + if (target_freq > policy->max) + target_freq = policy->max; + + freqs.old = omap_getspeed(0); + freqs.new = clk_round_rate(mpu_clk, target_freq * 1000) / 1000; + freqs.cpu = 0; + + if (freqs.old == freqs.new) + return ret; + + cpufreq_notify_transition(&freqs, CPUFREQ_PRECHANGE); + +#ifdef CONFIG_CPU_FREQ_DEBUG + pr_info("cpufreq-omap: transition: %u --> %u\n", freqs.old, freqs.new); +#endif + ret = clk_set_rate(mpu_clk, freqs.new * 1000); + if (!ret) + cpufreq_notify_transition(&freqs, CPUFREQ_POSTCHANGE); + + return ret; +} + +static int __init omap_cpu_init(struct cpufreq_policy *policy) +{ + int result = 0; + + mpu_clk = clk_get(NULL, "mpu"); + if (IS_ERR(mpu_clk)) + return PTR_ERR(mpu_clk); + + if (policy->cpu != 0) + return -EINVAL; + + policy->cur = policy->min = policy->max = omap_getspeed(0); + + clk_init_cpufreq_table(&freq_table); + + if (freq_table) { + result = cpufreq_frequency_table_cpuinfo(policy, freq_table); + if (!result) + cpufreq_frequency_table_get_attr(freq_table, + policy->cpu); + } else { + policy->cpuinfo.min_freq = clk_round_rate(mpu_clk, 0) / 1000; + policy->cpuinfo.max_freq = clk_round_rate(mpu_clk, + VERY_HI_RATE) / 1000; + } + + policy->min = policy->cpuinfo.min_freq; + policy->max = policy->cpuinfo.max_freq; + policy->cur = omap_getspeed(0); + + /* FIXME: what's the actual transition time? */ + policy->cpuinfo.transition_latency = 300 * 1000; + + return 0; +} + +static int omap_cpu_exit(struct cpufreq_policy *policy) +{ + clk_exit_cpufreq_table(&freq_table); + clk_put(mpu_clk); + return 0; +} + +static struct freq_attr *omap_cpufreq_attr[] = { + &cpufreq_freq_attr_scaling_available_freqs, + NULL, +}; + +static struct cpufreq_driver omap_driver = { + .flags = CPUFREQ_STICKY, + .verify = omap_verify_speed, + .target = omap_target, + .get = omap_getspeed, + .init = omap_cpu_init, + .exit = omap_cpu_exit, + .name = "omap1", + .attr = omap_cpufreq_attr, +}; + +static int __init omap_cpufreq_init(void) +{ + return cpufreq_register_driver(&omap_driver); +} + +static void __exit omap_cpufreq_exit(void) +{ + cpufreq_unregister_driver(&omap_driver); +} + +MODULE_DESCRIPTION("cpufreq driver for OMAP1 SOCs"); +MODULE_LICENSE("GPL"); +module_init(omap_cpufreq_init); +module_exit(omap_cpufreq_exit); diff --git a/arch/arm/mach-omap1/pm.h b/arch/arm/mach-omap1/pm.h index 56a647986ae..cd926dcb5e7 100644 --- a/arch/arm/mach-omap1/pm.h +++ b/arch/arm/mach-omap1/pm.h @@ -123,9 +123,9 @@ extern void allow_idle_sleep(void); extern void omap1_pm_idle(void); extern void omap1_pm_suspend(void); -extern void omap7xx_cpu_suspend(unsigned short, unsigned short); -extern void omap1510_cpu_suspend(unsigned short, unsigned short); -extern void omap1610_cpu_suspend(unsigned short, unsigned short); +extern void omap7xx_cpu_suspend(unsigned long, unsigned long); +extern void omap1510_cpu_suspend(unsigned long, unsigned long); +extern void omap1610_cpu_suspend(unsigned long, unsigned long); extern void omap7xx_idle_loop_suspend(void); extern void omap1510_idle_loop_suspend(void); extern void omap1610_idle_loop_suspend(void); diff --git a/arch/arm/mach-omap1/sleep.S b/arch/arm/mach-omap1/sleep.S index ef771ce8b03..c875bdc902c 100644 --- a/arch/arm/mach-omap1/sleep.S +++ b/arch/arm/mach-omap1/sleep.S @@ -58,6 +58,7 @@ */ #if defined(CONFIG_ARCH_OMAP730) || defined(CONFIG_ARCH_OMAP850) + .align 3 ENTRY(omap7xx_cpu_suspend) @ save registers on stack @@ -137,6 +138,7 @@ ENTRY(omap7xx_cpu_suspend_sz) #endif /* CONFIG_ARCH_OMAP730 || CONFIG_ARCH_OMAP850 */ #ifdef CONFIG_ARCH_OMAP15XX + .align 3 ENTRY(omap1510_cpu_suspend) @ save registers on stack @@ -211,6 +213,7 @@ ENTRY(omap1510_cpu_suspend_sz) #endif /* CONFIG_ARCH_OMAP15XX */ #if defined(CONFIG_ARCH_OMAP16XX) + .align 3 ENTRY(omap1610_cpu_suspend) @ save registers on stack diff --git a/arch/arm/mach-omap1/sram.S b/arch/arm/mach-omap1/sram.S index 7724e520d07..692587d07ea 100644 --- a/arch/arm/mach-omap1/sram.S +++ b/arch/arm/mach-omap1/sram.S @@ -18,6 +18,7 @@ /* * Reprograms ULPD and CKCTL. */ + .align 3 ENTRY(omap1_sram_reprogram_clock) stmfd sp!, {r0 - r12, lr} @ save registers on stack |