[PATCH 2/6] OMAP2+: omap_hwmod: manage the wake-up latency constraints
From: jean.pihet at newoldbits.com <hidden>
Date: 2011-12-14 14:51:40
Also in:
linux-omap, linux-pm
Subsystem:
arm port, omap hwmod support, omap2+ support, the rest · Maintainers:
Russell King, Paul Walmsley, Aaro Koskinen, Andreas Kemnade, Kevin Hilman, Roger Quadros, Tony Lindgren, Linus Torvalds
From: Jean Pihet <redacted> The OMAP PM code implements a handler for the per-device PM QoS framework. The handler queries the omap_hwmod layer in order to manage the power domains wake-up latency constraints. Hwmod retrieves the correct power domain and if it exists it calls the corresponding power domain function. Tested on OMAP3 Beagleboard and OMAP4 Pandaboard in RET/OFF using wake-up latency constraints on MPU, CORE and PER. Signed-off-by: Jean Pihet <redacted> Reviewed-by: Kevin Hilman <redacted> --- arch/arm/mach-omap2/omap_hwmod.c | 27 +++++++++++++++++++++++++- arch/arm/plat-omap/include/plat/omap_hwmod.h | 2 + 2 files changed, 28 insertions(+), 1 deletions(-)
diff --git a/arch/arm/mach-omap2/omap_hwmod.c b/arch/arm/mach-omap2/omap_hwmod.c
index 529142a..c3a4cc4 100644
--- a/arch/arm/mach-omap2/omap_hwmod.c
+++ b/arch/arm/mach-omap2/omap_hwmod.c@@ -143,6 +143,7 @@ #include "powerdomain.h" #include <plat/clock.h> #include <plat/omap_hwmod.h> +#include <plat/omap_device.h> #include <plat/prcm.h> #include "cm2xxx_3xxx.h"
@@ -2616,10 +2617,34 @@ ohsps_unlock: } /** + * omap_hwmod_set_wkup_constraint- set/release a wake-up latency constraint + * + * @oh: struct omap_hwmod* to which the target device belongs to. + * @cookie: identifier of the constraints list for @oh. + * @min_latency: the minimum allowed wake-up latency for @oh. + * + * Returns 0 upon success, -EINVAL in case of invalid parameters, or + * the return value from pwrdm_set_wkup_lat_constraint. + */ +int omap_hwmod_set_wkup_lat_constraint(struct omap_hwmod *oh, + void *cookie, long min_latency) +{ + struct powerdomain *pwrdm = omap_hwmod_get_pwrdm(oh); + + if (!pwrdm) { + pr_err("%s: Error: could not find powerdomain " + "for %s\n", __func__, oh->name); + return -EINVAL; + } + + return pwrdm_set_wkup_lat_constraint(pwrdm, cookie, min_latency); +} + +/** * omap_hwmod_get_context_loss_count - get lost context count * @oh: struct omap_hwmod * * - * Query the powerdomain of of @oh to get the context loss + * Query the powerdomain of @oh to get the context loss * count for this device. * * Returns the context loss count of the powerdomain assocated with @oh
diff --git a/arch/arm/plat-omap/include/plat/omap_hwmod.h b/arch/arm/plat-omap/include/plat/omap_hwmod.h
index 8b372ed..222f792 100644
--- a/arch/arm/plat-omap/include/plat/omap_hwmod.h
+++ b/arch/arm/plat-omap/include/plat/omap_hwmod.h@@ -600,6 +600,8 @@ int omap_hwmod_for_each_by_class(const char *classname, void *user); int omap_hwmod_set_postsetup_state(struct omap_hwmod *oh, u8 state); +int omap_hwmod_set_wkup_lat_constraint(struct omap_hwmod *oh, void *cookie, + long min_latency); int omap_hwmod_get_context_loss_count(struct omap_hwmod *oh); int omap_hwmod_no_setup_reset(struct omap_hwmod *oh);
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1.7.5.4