summaryrefslogtreecommitdiff
path: root/packages/linux/linux-omap2-git/beagleboard/0001-omap3-cpuidle.patch
diff options
context:
space:
mode:
Diffstat (limited to 'packages/linux/linux-omap2-git/beagleboard/0001-omap3-cpuidle.patch')
-rw-r--r--packages/linux/linux-omap2-git/beagleboard/0001-omap3-cpuidle.patch450
1 files changed, 0 insertions, 450 deletions
diff --git a/packages/linux/linux-omap2-git/beagleboard/0001-omap3-cpuidle.patch b/packages/linux/linux-omap2-git/beagleboard/0001-omap3-cpuidle.patch
deleted file mode 100644
index cdc9447b4c..0000000000
--- a/packages/linux/linux-omap2-git/beagleboard/0001-omap3-cpuidle.patch
+++ /dev/null
@@ -1,450 +0,0 @@
-From: "Rajendra Nayak" <rnayak@ti.com>
-To: <linux-omap@vger.kernel.org>
-Subject: [PATCH 01/02] OMAP3 CPUidle driver
-Date: Tue, 10 Jun 2008 12:39:00 +0530
-
-This patch adds the OMAP3 cpuidle driver. Irq enable/disable is done in the core cpuidle driver
-before it queries the governor for the next state.
-
-Signed-off-by: Rajendra Nayak <rnayak@ti.com>
-
----
- arch/arm/mach-omap2/Makefile | 2
- arch/arm/mach-omap2/cpuidle34xx.c | 293 ++++++++++++++++++++++++++++++++++++++
- arch/arm/mach-omap2/cpuidle34xx.h | 51 ++++++
- arch/arm/mach-omap2/pm34xx.c | 5
- drivers/cpuidle/cpuidle.c | 10 +
- 5 files changed, 359 insertions(+), 2 deletions(-)
-
-Index: linux-omap-2.6/arch/arm/mach-omap2/Makefile
-===================================================================
---- linux-omap-2.6.orig/arch/arm/mach-omap2/Makefile 2008-06-09 20:15:33.855303920 +0530
-+++ linux-omap-2.6/arch/arm/mach-omap2/Makefile 2008-06-09 20:15:39.569121361 +0530
-@@ -20,7 +20,7 @@ obj-y += pm.o
- obj-$(CONFIG_ARCH_OMAP2) += pm24xx.o
- obj-$(CONFIG_ARCH_OMAP2420) += sleep242x.o
- obj-$(CONFIG_ARCH_OMAP2430) += sleep243x.o
--obj-$(CONFIG_ARCH_OMAP3) += pm34xx.o sleep34xx.o
-+obj-$(CONFIG_ARCH_OMAP3) += pm34xx.o sleep34xx.o cpuidle34xx.o
- obj-$(CONFIG_PM_DEBUG) += pm-debug.o
- endif
-
-Index: linux-omap-2.6/arch/arm/mach-omap2/cpuidle34xx.c
-===================================================================
---- /dev/null 1970-01-01 00:00:00.000000000 +0000
-+++ linux-omap-2.6/arch/arm/mach-omap2/cpuidle34xx.c 2008-06-10 11:41:27.644820323 +0530
-@@ -0,0 +1,293 @@
-+/*
-+ * linux/arch/arm/mach-omap2/cpuidle34xx.c
-+ *
-+ * OMAP3 CPU IDLE Routines
-+ *
-+ * Copyright (C) 2007-2008 Texas Instruments, Inc.
-+ * Rajendra Nayak <rnayak@ti.com>
-+ *
-+ * Copyright (C) 2007 Texas Instruments, Inc.
-+ * Karthik Dasu <karthik-dp@ti.com>
-+ *
-+ * Copyright (C) 2006 Nokia Corporation
-+ * Tony Lindgren <tony@atomide.com>
-+ *
-+ * Copyright (C) 2005 Texas Instruments, Inc.
-+ * Richard Woodruff <r-woodruff2@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/cpuidle.h>
-+#include <asm/arch/pm.h>
-+#include <asm/arch/prcm.h>
-+#include <asm/arch/powerdomain.h>
-+#include <asm/arch/clockdomain.h>
-+#include <asm/arch/irqs.h>
-+#include "cpuidle34xx.h"
-+
-+#ifdef CONFIG_CPU_IDLE
-+
-+struct omap3_processor_cx omap3_power_states[OMAP3_MAX_STATES];
-+struct omap3_processor_cx current_cx_state;
-+
-+static int omap3_idle_bm_check(void)
-+{
-+ /* Check for omap3_fclks_active() here once available */
-+ return 0;
-+}
-+
-+/* omap3_enter_idle - Programs OMAP3 to enter the specified state.
-+ * returns the total time during which the system was idle.
-+ */
-+static int omap3_enter_idle(struct cpuidle_device *dev,
-+ struct cpuidle_state *state)
-+{
-+ struct omap3_processor_cx *cx = cpuidle_get_statedata(state);
-+ struct timespec ts_preidle, ts_postidle, ts_idle;
-+ struct powerdomain *mpu_pd, *core_pd, *per_pd, *neon_pd;
-+ int neon_pwrst;
-+
-+ current_cx_state = *cx;
-+
-+ if (cx->type == OMAP3_STATE_C0) {
-+ /* Do nothing for C0, not even a wfi */
-+ return 0;
-+ }
-+
-+ /* Used to keep track of the total time in idle */
-+ getnstimeofday(&ts_preidle);
-+
-+ mpu_pd = pwrdm_lookup("mpu_pwrdm");
-+ core_pd = pwrdm_lookup("core_pwrdm");
-+ per_pd = pwrdm_lookup("per_pwrdm");
-+ neon_pd = pwrdm_lookup("neon_pwrdm");
-+
-+ /* Reset previous power state registers */
-+ pwrdm_clear_all_prev_pwrst(mpu_pd);
-+ pwrdm_clear_all_prev_pwrst(neon_pd);
-+ pwrdm_clear_all_prev_pwrst(core_pd);
-+ pwrdm_clear_all_prev_pwrst(per_pd);
-+
-+ if (omap_irq_pending())
-+ return 0;
-+
-+ neon_pwrst = pwrdm_read_pwrst(neon_pd);
-+
-+ /* Program MPU/NEON to target state */
-+ if (cx->mpu_state < PWRDM_POWER_ON) {
-+ if (neon_pwrst == PWRDM_POWER_ON) {
-+ if (cx->mpu_state == PWRDM_POWER_RET)
-+ pwrdm_set_next_pwrst(neon_pd, PWRDM_POWER_RET);
-+ else if (cx->mpu_state == PWRDM_POWER_OFF)
-+ pwrdm_set_next_pwrst(neon_pd, PWRDM_POWER_OFF);
-+ }
-+ pwrdm_set_next_pwrst(mpu_pd, cx->mpu_state);
-+ }
-+
-+ /* Program CORE to target state */
-+ if (cx->core_state < PWRDM_POWER_ON)
-+ pwrdm_set_next_pwrst(core_pd, cx->core_state);
-+
-+ /* Execute ARM wfi */
-+ omap_sram_idle();
-+
-+ /* Program MPU/NEON to ON */
-+ if (cx->mpu_state < PWRDM_POWER_ON) {
-+ if (neon_pwrst == PWRDM_POWER_ON)
-+ pwrdm_set_next_pwrst(neon_pd, PWRDM_POWER_ON);
-+ pwrdm_set_next_pwrst(mpu_pd, PWRDM_POWER_ON);
-+ }
-+
-+ if (cx->core_state < PWRDM_POWER_ON)
-+ pwrdm_set_next_pwrst(core_pd, PWRDM_POWER_ON);
-+
-+ getnstimeofday(&ts_postidle);
-+ ts_idle = timespec_sub(ts_postidle, ts_preidle);
-+ return timespec_to_ns(&ts_idle);
-+}
-+
-+/*
-+ * omap3_enter_idle_bm - enter function for states with CPUIDLE_FLAG_CHECK_BM
-+ *
-+ * This function checks for all the pre-requisites needed for OMAP3 to enter
-+ * CORE RET/OFF state. It then calls omap3_enter_idle to program the desired
-+ * C state.
-+ */
-+static int omap3_enter_idle_bm(struct cpuidle_device *dev,
-+ struct cpuidle_state *state)
-+{
-+ struct cpuidle_state *new_state = NULL;
-+ int i, j;
-+
-+ if ((state->flags & CPUIDLE_FLAG_CHECK_BM) && omap3_idle_bm_check()) {
-+
-+ /* Find current state in list */
-+ for (i = 0; i < OMAP3_MAX_STATES; i++)
-+ if (state == &dev->states[i])
-+ break;
-+ BUG_ON(i == OMAP3_MAX_STATES);
-+
-+ /* Back up to non 'CHECK_BM' state */
-+ for (j = i - 1; j > 0; j--) {
-+ struct cpuidle_state *s = &dev->states[j];
-+
-+ if (!(s->flags & CPUIDLE_FLAG_CHECK_BM)) {
-+ new_state = s;
-+ break;
-+ }
-+ }
-+
-+ pr_debug("%s: Bus activity: Entering %s (instead of %s)\n",
-+ __FUNCTION__, new_state->name, state->name);
-+ }
-+
-+ return omap3_enter_idle(dev, new_state ? : state);
-+}
-+
-+DEFINE_PER_CPU(struct cpuidle_device, omap3_idle_dev);
-+
-+/* omap3_init_power_states - Initialises the OMAP3 specific C states.
-+ * Below is the desciption of each C state.
-+ *
-+ C0 . System executing code
-+ C1 . MPU WFI + Core active
-+ C2 . MPU CSWR + Core active
-+ C3 . MPU OFF + Core active
-+ C4 . MPU CSWR + Core CSWR
-+ C5 . MPU OFF + Core CSWR
-+ C6 . MPU OFF + Core OFF
-+ */
-+void omap_init_power_states(void)
-+{
-+ /* C0 . System executing code */
-+ omap3_power_states[0].valid = 1;
-+ omap3_power_states[0].type = OMAP3_STATE_C0;
-+ omap3_power_states[0].sleep_latency = 0;
-+ omap3_power_states[0].wakeup_latency = 0;
-+ omap3_power_states[0].threshold = 0;
-+ omap3_power_states[0].mpu_state = PWRDM_POWER_ON;
-+ omap3_power_states[0].core_state = PWRDM_POWER_ON;
-+ omap3_power_states[0].flags = CPUIDLE_FLAG_TIME_VALID |
-+ CPUIDLE_FLAG_SHALLOW;
-+
-+ /* C1 . MPU WFI + Core active */
-+ omap3_power_states[1].valid = 1;
-+ omap3_power_states[1].type = OMAP3_STATE_C1;
-+ omap3_power_states[1].sleep_latency = 10;
-+ omap3_power_states[1].wakeup_latency = 10;
-+ omap3_power_states[1].threshold = 30;
-+ omap3_power_states[1].mpu_state = PWRDM_POWER_ON;
-+ omap3_power_states[1].core_state = PWRDM_POWER_ON;
-+ omap3_power_states[1].flags = CPUIDLE_FLAG_TIME_VALID |
-+ CPUIDLE_FLAG_SHALLOW;
-+
-+ /* C2 . MPU CSWR + Core active */
-+ omap3_power_states[2].valid = 1;
-+ omap3_power_states[2].type = OMAP3_STATE_C2;
-+ omap3_power_states[2].sleep_latency = 50;
-+ omap3_power_states[2].wakeup_latency = 50;
-+ omap3_power_states[2].threshold = 300;
-+ omap3_power_states[2].mpu_state = PWRDM_POWER_RET;
-+ omap3_power_states[2].core_state = PWRDM_POWER_ON;
-+ omap3_power_states[2].flags = CPUIDLE_FLAG_TIME_VALID |
-+ CPUIDLE_FLAG_BALANCED;
-+
-+ /* C3 . MPU OFF + Core active */
-+ omap3_power_states[3].valid = 0;
-+ omap3_power_states[3].type = OMAP3_STATE_C3;
-+ omap3_power_states[3].sleep_latency = 1500;
-+ omap3_power_states[3].wakeup_latency = 1800;
-+ omap3_power_states[3].threshold = 4000;
-+ omap3_power_states[3].mpu_state = PWRDM_POWER_OFF;
-+ omap3_power_states[3].core_state = PWRDM_POWER_RET;
-+ omap3_power_states[3].flags = CPUIDLE_FLAG_TIME_VALID |
-+ CPUIDLE_FLAG_BALANCED;
-+
-+ /* C4 . MPU CSWR + Core CSWR*/
-+ omap3_power_states[4].valid = 1;
-+ omap3_power_states[4].type = OMAP3_STATE_C4;
-+ omap3_power_states[4].sleep_latency = 2500;
-+ omap3_power_states[4].wakeup_latency = 7500;
-+ omap3_power_states[4].threshold = 12000;
-+ omap3_power_states[4].mpu_state = PWRDM_POWER_RET;
-+ omap3_power_states[4].core_state = PWRDM_POWER_RET;
-+ omap3_power_states[4].flags = CPUIDLE_FLAG_TIME_VALID |
-+ CPUIDLE_FLAG_BALANCED | CPUIDLE_FLAG_CHECK_BM;
-+
-+ /* C5 . MPU OFF + Core CSWR */
-+ omap3_power_states[5].valid = 0;
-+ omap3_power_states[5].type = OMAP3_STATE_C5;
-+ omap3_power_states[5].sleep_latency = 3000;
-+ omap3_power_states[5].wakeup_latency = 8500;
-+ omap3_power_states[5].threshold = 15000;
-+ omap3_power_states[5].mpu_state = PWRDM_POWER_OFF;
-+ omap3_power_states[5].core_state = PWRDM_POWER_RET;
-+ omap3_power_states[5].flags = CPUIDLE_FLAG_TIME_VALID |
-+ CPUIDLE_FLAG_BALANCED | CPUIDLE_FLAG_CHECK_BM;
-+
-+ /* C6 . MPU OFF + Core OFF */
-+ omap3_power_states[6].valid = 0;
-+ omap3_power_states[6].type = OMAP3_STATE_C6;
-+ omap3_power_states[6].sleep_latency = 10000;
-+ omap3_power_states[6].wakeup_latency = 30000;
-+ omap3_power_states[6].threshold = 300000;
-+ omap3_power_states[6].mpu_state = PWRDM_POWER_OFF;
-+ omap3_power_states[6].core_state = PWRDM_POWER_OFF;
-+ omap3_power_states[6].flags = CPUIDLE_FLAG_TIME_VALID |
-+ CPUIDLE_FLAG_DEEP | CPUIDLE_FLAG_CHECK_BM;
-+}
-+
-+struct cpuidle_driver omap3_idle_driver = {
-+ .name = "omap3_idle",
-+ .owner = THIS_MODULE,
-+};
-+/*
-+ * omap3_idle_init - Init routine for OMAP3 idle.
-+ * Registers the OMAP3 specific cpuidle driver with the cpuidle f/w
-+ * with the valid set of states.
-+ */
-+int omap3_idle_init(void)
-+{
-+ int i, count = 0;
-+ struct omap3_processor_cx *cx;
-+ struct cpuidle_state *state;
-+ struct cpuidle_device *dev;
-+
-+ omap_init_power_states();
-+ cpuidle_register_driver(&omap3_idle_driver);
-+
-+ dev = &per_cpu(omap3_idle_dev, smp_processor_id());
-+
-+ for (i = 0; i < OMAP3_MAX_STATES; i++) {
-+ cx = &omap3_power_states[i];
-+ state = &dev->states[count];
-+
-+ if (!cx->valid)
-+ continue;
-+ cpuidle_set_statedata(state, cx);
-+ state->exit_latency = cx->sleep_latency + cx->wakeup_latency;
-+ state->target_residency = cx->threshold;
-+ state->flags = cx->flags;
-+ state->enter = (state->flags & CPUIDLE_FLAG_CHECK_BM) ?
-+ omap3_enter_idle_bm : omap3_enter_idle;
-+ sprintf(state->name, "C%d", count+1);
-+ count++;
-+ }
-+
-+ if (!count)
-+ return -EINVAL;
-+ dev->state_count = count;
-+
-+ if (cpuidle_register_device(dev)) {
-+ printk(KERN_ERR "%s: CPUidle register device failed\n",
-+ __FUNCTION__);
-+ return -EIO;
-+ }
-+
-+ return 0;
-+}
-+__initcall(omap3_idle_init);
-+#endif /* CONFIG_CPU_IDLE */
-Index: linux-omap-2.6/arch/arm/mach-omap2/cpuidle34xx.h
-===================================================================
---- /dev/null 1970-01-01 00:00:00.000000000 +0000
-+++ linux-omap-2.6/arch/arm/mach-omap2/cpuidle34xx.h 2008-06-09 20:15:39.569121361 +0530
-@@ -0,0 +1,51 @@
-+/*
-+ * linux/arch/arm/mach-omap2/cpuidle34xx.h
-+ *
-+ * OMAP3 cpuidle structure definitions
-+ *
-+ * Copyright (C) 2007-2008 Texas Instruments, Inc.
-+ * Written by 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.
-+ *
-+ * THIS PACKAGE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
-+ * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
-+ * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
-+ *
-+ * History:
-+ *
-+ */
-+
-+#ifndef ARCH_ARM_MACH_OMAP2_CPUIDLE_34XX
-+#define ARCH_ARM_MACH_OMAP2_CPUIDLE_34XX
-+
-+#define OMAP3_MAX_STATES 7
-+#define OMAP3_STATE_C0 0 /* C0 - System executing code */
-+#define OMAP3_STATE_C1 1 /* C1 - MPU WFI + Core active */
-+#define OMAP3_STATE_C2 2 /* C2 - MPU CSWR + Core active */
-+#define OMAP3_STATE_C3 3 /* C3 - MPU OFF + Core active */
-+#define OMAP3_STATE_C4 4 /* C4 - MPU RET + Core RET */
-+#define OMAP3_STATE_C5 5 /* C5 - MPU OFF + Core RET */
-+#define OMAP3_STATE_C6 6 /* C6 - MPU OFF + Core OFF */
-+
-+extern void omap_sram_idle(void);
-+extern int omap3_irq_pending(void);
-+
-+struct omap3_processor_cx {
-+ u8 valid;
-+ u8 type;
-+ u32 sleep_latency;
-+ u32 wakeup_latency;
-+ u32 mpu_state;
-+ u32 core_state;
-+ u32 threshold;
-+ u32 flags;
-+};
-+
-+void omap_init_power_states(void);
-+int omap3_idle_init(void);
-+
-+#endif /* ARCH_ARM_MACH_OMAP2_CPUIDLE_34XX */
-+
-Index: linux-omap-2.6/arch/arm/mach-omap2/pm34xx.c
-===================================================================
---- linux-omap-2.6.orig/arch/arm/mach-omap2/pm34xx.c 2008-06-09 20:15:33.855303920 +0530
-+++ linux-omap-2.6/arch/arm/mach-omap2/pm34xx.c 2008-06-09 20:16:20.976798343 +0530
-@@ -141,7 +141,7 @@ static irqreturn_t prcm_interrupt_handle
- return IRQ_HANDLED;
- }
-
--static void omap_sram_idle(void)
-+void omap_sram_idle(void)
- {
- /* Variable to tell what needs to be saved and restored
- * in omap_sram_idle*/
-@@ -156,6 +156,7 @@ static void omap_sram_idle(void)
-
- mpu_next_state = pwrdm_read_next_pwrst(mpu_pwrdm);
- switch (mpu_next_state) {
-+ case PWRDM_POWER_ON:
- case PWRDM_POWER_RET:
- /* No need to save context */
- save_state = 0;
-@@ -386,7 +387,9 @@ int __init omap3_pm_init(void)
-
- prcm_setup_regs();
-
-+#ifndef CONFIG_CPU_IDLE
- pm_idle = omap3_pm_idle;
-+#endif
-
- err1:
- return ret;
-Index: linux-omap-2.6/drivers/cpuidle/cpuidle.c
-===================================================================
---- linux-omap-2.6.orig/drivers/cpuidle/cpuidle.c 2008-06-09 20:15:33.856303888 +0530
-+++ linux-omap-2.6/drivers/cpuidle/cpuidle.c 2008-06-09 20:15:39.570121329 +0530
-@@ -58,6 +58,11 @@ static void cpuidle_idle_call(void)
- return;
- }
-
-+#ifdef CONFIG_ARCH_OMAP3
-+ local_irq_disable();
-+ local_fiq_disable();
-+#endif
-+
- /* ask the governor for the next state */
- next_state = cpuidle_curr_governor->select(dev);
- if (need_resched())
-@@ -70,6 +75,11 @@ static void cpuidle_idle_call(void)
- target_state->time += (unsigned long long)dev->last_residency;
- target_state->usage++;
-
-+#ifdef CONFIG_ARCH_OMAP3
-+ local_irq_enable();
-+ local_fiq_enable();
-+#endif
-+
- /* give the governor an opportunity to reflect on the outcome */
- if (cpuidle_curr_governor->reflect)
- cpuidle_curr_governor->reflect(dev);
-
---
-To unsubscribe from this list: send the line "unsubscribe linux-omap" in
-the body of a message to majordomo@vger.kernel.org
-More majordomo info at http://vger.kernel.org/majordomo-info.html
-
generated by cgit v1.2.3 (git 2.25.1) at 2025-02-04 23:35:27 +0000