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authorTony Lindgren <tony@atomide.com>2018-04-16 19:22:01 +0200
committerTony Lindgren <tony@atomide.com>2018-04-16 19:22:40 +0200
commit44773ba170a6f969620221a6d87d03feae5e464f (patch)
tree2f18ff1277fe87f237570ace7de135a8047196a0 /arch/arm/mach-omap2/omap-pm-noop.c
parentLinux 4.17-rc1 (diff)
downloadlinux-44773ba170a6f969620221a6d87d03feae5e464f.tar.xz
linux-44773ba170a6f969620221a6d87d03feae5e464f.zip
ARM: OMAP2+: Drop unused pm-noop
Looks like these functions don't do anything in the mainline kernel so we can just drop it. Note that we must now also remove ir-rx51 pdata as it relies on the dummy platform data that does not do anything. And ir-rx51 is calling a pdata callback that doesn't do anything without checking if it exists first. For configuring device specific minimal latencies, the interface to use is pm_qos_add_request(). For an example, see what was done in commit 9834ffd1ecc3 ("ASoC: omap-mcbsp: Add PM QoS support for McBSP to prevent glitches"). I've added some comments to ir-rx51 so people using it can add pm_qos support and test it. Cc: Ivaylo Dimitrov <ivo.g.dimitrov.75@gmail.com> Cc: Kevin Hilman <khilman@kernel.org> Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Cc: Tomi Valkeinen <tomi.valkeinen@ti.com> Acked-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org> Signed-off-by: Tony Lindgren <tony@atomide.com>
Diffstat (limited to 'arch/arm/mach-omap2/omap-pm-noop.c')
-rw-r--r--arch/arm/mach-omap2/omap-pm-noop.c176
1 files changed, 0 insertions, 176 deletions
diff --git a/arch/arm/mach-omap2/omap-pm-noop.c b/arch/arm/mach-omap2/omap-pm-noop.c
deleted file mode 100644
index 4ead077ea4e7..000000000000
--- a/arch/arm/mach-omap2/omap-pm-noop.c
+++ /dev/null
@@ -1,176 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/*
- * omap-pm-noop.c - OMAP power management interface - dummy version
- *
- * This code implements the OMAP power management interface to
- * drivers, CPUIdle, CPUFreq, and DSP Bridge. It is strictly for
- * debug/demonstration use, as it does nothing but printk() whenever a
- * function is called (when DEBUG is defined, below)
- *
- * Copyright (C) 2008-2009 Texas Instruments, Inc.
- * Copyright (C) 2008-2009 Nokia Corporation
- * Paul Walmsley
- *
- * Interface developed by (in alphabetical order):
- * Karthik Dasu, Tony Lindgren, Rajendra Nayak, Sakari Poussa, Veeramanikandan
- * Raju, Anand Sawant, Igor Stoppa, Paul Walmsley, Richard Woodruff
- */
-
-#undef DEBUG
-
-#include <linux/init.h>
-#include <linux/cpufreq.h>
-#include <linux/device.h>
-#include <linux/platform_device.h>
-
-#include "omap_device.h"
-#include "omap-pm.h"
-
-static bool off_mode_enabled;
-static int dummy_context_loss_counter;
-
-/*
- * Device-driver-originated constraints (via board-*.c files)
- */
-
-int omap_pm_set_max_mpu_wakeup_lat(struct device *dev, long t)
-{
- if (!dev || t < -1) {
- WARN(1, "OMAP PM: %s: invalid parameter(s)", __func__);
- return -EINVAL;
- }
-
- if (t == -1)
- pr_debug("OMAP PM: remove max MPU wakeup latency constraint: dev %s\n",
- dev_name(dev));
- else
- pr_debug("OMAP PM: add max MPU wakeup latency constraint: dev %s, t = %ld usec\n",
- dev_name(dev), t);
-
- /*
- * For current Linux, this needs to map the MPU to a
- * powerdomain, then go through the list of current max lat
- * constraints on the MPU and find the smallest. If
- * the latency constraint has changed, the code should
- * recompute the state to enter for the next powerdomain
- * state.
- *
- * TI CDP code can call constraint_set here.
- */
-
- return 0;
-}
-
-int omap_pm_set_min_bus_tput(struct device *dev, u8 agent_id, unsigned long r)
-{
- if (!dev || (agent_id != OCP_INITIATOR_AGENT &&
- agent_id != OCP_TARGET_AGENT)) {
- WARN(1, "OMAP PM: %s: invalid parameter(s)", __func__);
- return -EINVAL;
- }
-
- if (r == 0)
- pr_debug("OMAP PM: remove min bus tput constraint: dev %s for agent_id %d\n",
- dev_name(dev), agent_id);
- else
- pr_debug("OMAP PM: add min bus tput constraint: dev %s for agent_id %d: rate %ld KiB\n",
- dev_name(dev), agent_id, r);
-
- /*
- * This code should model the interconnect and compute the
- * required clock frequency, convert that to a VDD2 OPP ID, then
- * set the VDD2 OPP appropriately.
- *
- * TI CDP code can call constraint_set here on the VDD2 OPP.
- */
-
- return 0;
-}
-
-/*
- * DSP Bridge-specific constraints
- */
-
-
-/**
- * omap_pm_enable_off_mode - notify OMAP PM that off-mode is enabled
- *
- * Intended for use only by OMAP PM core code to notify this layer
- * that off mode has been enabled.
- */
-void omap_pm_enable_off_mode(void)
-{
- off_mode_enabled = true;
-}
-
-/**
- * omap_pm_disable_off_mode - notify OMAP PM that off-mode is disabled
- *
- * Intended for use only by OMAP PM core code to notify this layer
- * that off mode has been disabled.
- */
-void omap_pm_disable_off_mode(void)
-{
- off_mode_enabled = false;
-}
-
-/*
- * Device context loss tracking
- */
-
-#ifdef CONFIG_ARCH_OMAP2PLUS
-
-int omap_pm_get_dev_context_loss_count(struct device *dev)
-{
- struct platform_device *pdev = to_platform_device(dev);
- int count;
-
- if (WARN_ON(!dev))
- return -ENODEV;
-
- if (dev->pm_domain == &omap_device_pm_domain) {
- count = omap_device_get_context_loss_count(pdev);
- } else {
- WARN_ONCE(off_mode_enabled, "omap_pm: using dummy context loss counter; device %s should be converted to omap_device",
- dev_name(dev));
-
- count = dummy_context_loss_counter;
-
- if (off_mode_enabled) {
- count++;
- /*
- * Context loss count has to be a non-negative value.
- * Clear the sign bit to get a value range from 0 to
- * INT_MAX.
- */
- count &= INT_MAX;
- dummy_context_loss_counter = count;
- }
- }
-
- pr_debug("OMAP PM: context loss count for dev %s = %d\n",
- dev_name(dev), count);
-
- return count;
-}
-
-#else
-
-int omap_pm_get_dev_context_loss_count(struct device *dev)
-{
- return dummy_context_loss_counter;
-}
-
-#endif
-
-/* Should be called before clk framework init */
-int __init omap_pm_if_early_init(void)
-{
- return 0;
-}
-
-/* Must be called after clock framework is initialized */
-int __init omap_pm_if_init(void)
-{
- return 0;
-}