diff options
Diffstat (limited to 'recipes/linux/linux-omap-2.6.26/beagleboard/03-omappm-omap3srf.eml')
| -rw-r--r-- | recipes/linux/linux-omap-2.6.26/beagleboard/03-omappm-omap3srf.eml | 167 |
1 files changed, 167 insertions, 0 deletions
diff --git a/recipes/linux/linux-omap-2.6.26/beagleboard/03-omappm-omap3srf.eml b/recipes/linux/linux-omap-2.6.26/beagleboard/03-omappm-omap3srf.eml new file mode 100644 index 0000000000..d052023f12 --- /dev/null +++ b/recipes/linux/linux-omap-2.6.26/beagleboard/03-omappm-omap3srf.eml @@ -0,0 +1,167 @@ +Adds init/change_level/validate_level calls for OMAP3 resources + +Signed-off-by: Rajendra Nayak <rnayak@ti.com> +--- + arch/arm/mach-omap2/resource34xx.c | 148 +++++++++++++++++++++++++++++++++++++ + 1 files changed, 148 insertions(+) + +Index: linux-omap-2.6/arch/arm/mach-omap2/resource34xx.c +=================================================================== +--- /dev/null 1970-01-01 00:00:00.000000000 +0000 ++++ linux-omap-2.6/arch/arm/mach-omap2/resource34xx.c 2008-08-07 +15:07:04.000000000 +0530 +@@ -0,0 +1,148 @@ ++/* ++ * linux/arch/arm/mach-omap2/resource34xx.c ++ * OMAP3 resource init/change_level/validate_level functions ++ * ++ * 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: ++ * ++ */ ++ ++#include <linux/pm_qos_params.h> ++#include <asm/arch/powerdomain.h> ++#include <asm/arch/clockdomain.h> ++#include "resource34xx.h" ++ ++/** ++ * init_latency - Initializes the mpu/core latency resource. ++ * @resp: Latency resource to be initalized ++ * ++ * No return value. ++ */ ++void init_latency(struct shared_resource *resp) ++{ ++ resp->no_of_users = 0; ++ resp->curr_level = RES_DEFAULTLEVEL; ++ *((u8 *)resp->resource_data) = 0; ++ return; ++} ++ ++/** ++ * set_latency - Adds/Updates and removes the CPU_DMA_LATENCY in *pm_qos_params. ++ * @resp: resource pointer ++ * @latency: target latency to be set ++ * ++ * Returns 0 on success, or error values as returned by ++ * pm_qos_update_requirement/pm_qos_add_requirement. ++ */ ++int set_latency(struct shared_resource *resp, u32 latency) ++{ ++ u8 *pm_qos_req_added; ++ ++ if (resp->curr_level == latency) ++ return 0; ++ else ++ /* Update the resources current level */ ++ resp->curr_level = latency; ++ ++ pm_qos_req_added = resp->resource_data; ++ if (latency == RES_DEFAULTLEVEL) ++ /* No more users left, remove the pm_qos_req if present */ ++ if (*pm_qos_req_added) { ++ pm_qos_remove_requirement(PM_QOS_CPU_DMA_LATENCY, ++ resp->name); ++ *pm_qos_req_added = 0; ++ return 0; ++ } ++ ++ if (*pm_qos_req_added) { ++ return pm_qos_update_requirement(PM_QOS_CPU_DMA_LATENCY, ++ resp->name, latency); ++ } else { ++ *pm_qos_req_added = 1; ++ return pm_qos_add_requirement(PM_QOS_CPU_DMA_LATENCY, ++ resp->name, latency); ++ } ++} ++ ++/** ++ * init_pd_latency - Initializes the power domain latency resource. ++ * @resp: Power Domain Latency resource to be initialized. ++ * ++ * No return value. ++ */ ++void init_pd_latency(struct shared_resource *resp) ++{ ++ struct pd_latency_db *pd_lat_db; ++ ++ resp->no_of_users = 0; ++ resp->curr_level = PD_LATENCY_OFF; ++ pd_lat_db = resp->resource_data; ++ /* Populate the power domain associated with the latency resource */ ++ pd_lat_db->pd = pwrdm_lookup(pd_lat_db->pwrdm_name); ++ return; ++} ++ ++/** ++ * set_pd_latency - Updates the curr_level of the power domain resource. ++ * @resp: Power domain latency resource. ++ * @latency: New latency value acceptable. ++ * ++ * This function maps the latency in microsecs to the acceptable ++ * Power domain state using the latency DB. ++ * It then programs the power domain to enter the target state. ++ * Always returns 0. ++ */ ++int set_pd_latency(struct shared_resource *resp, u32 latency) ++{ ++ u32 pd_lat_level, ind, i; ++ struct pd_latency_db *pd_lat_db; ++ struct powerdomain *pwrdm; ++ ++ pd_lat_db = resp->resource_data; ++ pwrdm = pd_lat_db->pd; ++ pd_lat_level = PD_LATENCY_OFF; ++ /* using the latency db map to the appropriate PD state */ ++ for (ind = 0; ind < PD_LATENCY_MAXLEVEL; ind++) ++ if (pd_lat_db->latency[ind] < latency) ++ pd_lat_level = ind; ++ ++ resp->curr_level = pd_lat_level; ++ switch (pd_lat_level) { ++ case PWRDM_POWER_OFF: ++ case PWRDM_POWER_RET: ++ /* Errata 1.29: No transitions from INACTIVE to RET/OFF ++ * possible. ++ * Need to be taken care of here. ++ */ ++ if (pwrdm_read_pwrst(pwrdm) != PWRDM_POWER_ON) { ++ /* Force the clock domains to ON */ ++ for (i = 0; pwrdm->pwrdm_clkdms[i]; i++) { ++ omap2_clkdm_deny_idle(pwrdm->pwrdm_clkdms[i]); ++ omap2_clkdm_wakeup(pwrdm->pwrdm_clkdms[i]); ++ } ++ pwrdm_set_next_pwrst(pwrdm, PWRDM_POWER_ON); ++ pwrdm_set_next_pwrst(pwrdm, pd_lat_level); ++ for (i = 0; pwrdm->pwrdm_clkdms[i]; i++) { ++ omap2_clkdm_sleep(pwrdm->pwrdm_clkdms[i]); ++ omap2_clkdm_allow_idle(pwrdm->pwrdm_clkdms[i]); ++ } ++ } else ++ pwrdm_set_next_pwrst(pwrdm, pd_lat_level); ++ break; ++ case PWRDM_POWER_ON: ++ pwrdm_set_next_pwrst(pwrdm, PWRDM_POWER_ON); ++ break; ++ default: ++ break; ++ } ++ return 0; ++} + + +-- +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 |