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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
9834ffd1ec ("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>
hifive-unleashed-5.1
Tony Lindgren 2018-04-16 10:22:01 -07:00
parent 60cc43fc88
commit 44773ba170
14 changed files with 4 additions and 413 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
arch/arm/mach-omap2/Makefile
View File

@ -78,7 +78,6 @@ endif
omap-4-5-pm-common = omap-mpuss-lowpower.o
obj-$(CONFIG_ARCH_OMAP4) += $(omap-4-5-pm-common)
obj-$(CONFIG_SOC_OMAP5) += $(omap-4-5-pm-common)
obj-$(CONFIG_OMAP_PM_NOOP) += omap-pm-noop.o
ifeq ($(CONFIG_PM),y)
obj-$(CONFIG_ARCH_OMAP2) += pm24xx.o

7
arch/arm/mach-omap2/display.c
View File

@ -32,7 +32,6 @@
#include <linux/platform_data/omapdss.h>
#include "omap_hwmod.h"
#include "omap_device.h"
#include "omap-pm.h"
#include "common.h"
#include "soc.h"
@ -126,11 +125,6 @@ static void omap_dsi_disable_pads(int dsi_id, unsigned lane_mask)
omap4_dsi_mux_pads(dsi_id, 0);
}
static int omap_dss_set_min_bus_tput(struct device *dev, unsigned long tput)
{
return omap_pm_set_min_bus_tput(dev, OCP_INITIATOR_AGENT, tput);
}
static enum omapdss_version __init omap_display_get_version(void)
{
if (cpu_is_omap24xx())
@ -169,7 +163,6 @@ static int __init omapdss_init_fbdev(void)
static struct omap_dss_board_info board_data = {
.dsi_enable_pads = omap_dsi_enable_pads,
.dsi_disable_pads = omap_dsi_disable_pads,
.set_min_bus_tput = omap_dss_set_min_bus_tput,
};
struct device_node *node;
int r;

1
arch/arm/mach-omap2/hsmmc.c
View File

@ -18,7 +18,6 @@
#include "soc.h"
#include "omap_device.h"
#include "omap-pm.h"
#include "hsmmc.h"
#include "control.h"

1
arch/arm/mach-omap2/i2c.c
View File

@ -22,7 +22,6 @@
#include "soc.h"
#include "omap_hwmod.h"
#include "omap_device.h"
#include "omap-pm.h"
#include "prm.h"
#include "common.h"

3
arch/arm/mach-omap2/io.c
View File

@ -37,7 +37,6 @@
#include "clock.h"
#include "clock2xxx.h"
#include "clock3xxx.h"
#include "omap-pm.h"
#include "sdrc.h"
#include "control.h"
#include "serial.h"
@ -421,8 +420,6 @@ static void __init __maybe_unused omap_hwmod_init_postsetup(void)
postsetup_state = _HWMOD_STATE_ENABLED;
#endif
omap_hwmod_for_each(_set_hwmod_postsetup_state, &postsetup_state);
omap_pm_if_early_init();
}
static void __init __maybe_unused omap_common_late_init(void)

176
arch/arm/mach-omap2/omap-pm-noop.c
View File

@ -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;
}

161
arch/arm/mach-omap2/omap-pm.h
View File

@ -1,161 +0,0 @@
/* SPDX-License-Identifier: GPL-2.0 */
/*
* omap-pm.h - OMAP power management interface
*
* Copyright (C) 2008-2010 Texas Instruments, Inc.
* Copyright (C) 2008-2010 Nokia Corporation
* Paul Walmsley
*
* Interface developed by (in alphabetical order): Karthik Dasu, Jouni
* Högander, Tony Lindgren, Rajendra Nayak, Sakari Poussa,
* Veeramanikandan Raju, Anand Sawant, Igor Stoppa, Paul Walmsley,
* Richard Woodruff
*/
#ifndef ASM_ARM_ARCH_OMAP_OMAP_PM_H
#define ASM_ARM_ARCH_OMAP_OMAP_PM_H
#include <linux/device.h>
#include <linux/cpufreq.h>
#include <linux/clk.h>
#include <linux/pm_opp.h>
/*
* agent_id values for use with omap_pm_set_min_bus_tput():
*
* OCP_INITIATOR_AGENT is only valid for devices that can act as
* initiators -- it represents the device's L3 interconnect
* connection. OCP_TARGET_AGENT represents the device's L4
* interconnect connection.
*/
#define OCP_TARGET_AGENT 1
#define OCP_INITIATOR_AGENT 2
/**
* omap_pm_if_early_init - OMAP PM init code called before clock fw init
* @mpu_opp_table: array ptr to struct omap_opp for MPU
* @dsp_opp_table: array ptr to struct omap_opp for DSP
* @l3_opp_table : array ptr to struct omap_opp for CORE
*
* Initialize anything that must be configured before the clock
* framework starts. The "_if_" is to avoid name collisions with the
* PM idle-loop code.
*/
int __init omap_pm_if_early_init(void);
/**
* omap_pm_if_init - OMAP PM init code called after clock fw init
*
* The main initialization code. OPP tables are passed in here. The
* "_if_" is to avoid name collisions with the PM idle-loop code.
*/
int __init omap_pm_if_init(void);
/*
* Device-driver-originated constraints (via board-*.c files, platform_data)
*/
/**
* omap_pm_set_max_mpu_wakeup_lat - set the maximum MPU wakeup latency
* @dev: struct device * requesting the constraint
* @t: maximum MPU wakeup latency in microseconds
*
* Request that the maximum interrupt latency for the MPU to be no
* greater than @t microseconds. "Interrupt latency" in this case is
* defined as the elapsed time from the occurrence of a hardware or
* timer interrupt to the time when the device driver's interrupt
* service routine has been entered by the MPU.
*
* It is intended that underlying PM code will use this information to
* determine what power state to put the MPU powerdomain into, and
* possibly the CORE powerdomain as well, since interrupt handling
* code currently runs from SDRAM. Advanced PM or board*.c code may
* also configure interrupt controller priorities, OCP bus priorities,
* CPU speed(s), etc.
*
* This function will not affect device wakeup latency, e.g., time
* elapsed from when a device driver enables a hardware device with
* clk_enable(), to when the device is ready for register access or
* other use. To control this device wakeup latency, use
* omap_pm_set_max_dev_wakeup_lat()
*
* Multiple calls to omap_pm_set_max_mpu_wakeup_lat() will replace the
* previous t value. To remove the latency target for the MPU, call
* with t = -1.
*
* XXX This constraint will be deprecated soon in favor of the more
* general omap_pm_set_max_dev_wakeup_lat()
*
* Returns -EINVAL for an invalid argument, -ERANGE if the constraint
* is not satisfiable, or 0 upon success.
*/
int omap_pm_set_max_mpu_wakeup_lat(struct device *dev, long t);
/**
* omap_pm_set_min_bus_tput - set minimum bus throughput needed by device
* @dev: struct device * requesting the constraint
* @tbus_id: interconnect to operate on (OCP_{INITIATOR,TARGET}_AGENT)
* @r: minimum throughput (in KiB/s)
*
* Request that the minimum data throughput on the OCP interconnect
* attached to device @dev interconnect agent @tbus_id be no less
* than @r KiB/s.
*
* It is expected that the OMAP PM or bus code will use this
* information to set the interconnect clock to run at the lowest
* possible speed that satisfies all current system users. The PM or
* bus code will adjust the estimate based on its model of the bus, so
* device driver authors should attempt to specify an accurate
* quantity for their device use case, and let the PM or bus code
* overestimate the numbers as necessary to handle request/response
* latency, other competing users on the system, etc. On OMAP2/3, if
* a driver requests a minimum L4 interconnect speed constraint, the
* code will also need to add an minimum L3 interconnect speed
* constraint,
*
* Multiple calls to omap_pm_set_min_bus_tput() will replace the
* previous rate value for this device. To remove the interconnect
* throughput restriction for this device, call with r = 0.
*
* Returns -EINVAL for an invalid argument, -ERANGE if the constraint
* is not satisfiable, or 0 upon success.
*/
int omap_pm_set_min_bus_tput(struct device *dev, u8 agent_id, unsigned long r);
/*
* CPUFreq-originated constraint
*
* In the future, this should be handled by custom OPP clocktype
* functions.
*/
/*
* Device context loss tracking
*/
/**
* omap_pm_get_dev_context_loss_count - return count of times dev has lost ctx
* @dev: struct device *
*
* This function returns the number of times that the device @dev has
* lost its internal context. This generally occurs on a powerdomain
* transition to OFF. Drivers use this as an optimization to avoid restoring
* context if the device hasn't lost it. To use, drivers should initially
* call this in their context save functions and store the result. Early in
* the driver's context restore function, the driver should call this function
* again, and compare the result to the stored counter. If they differ, the
* driver must restore device context. If the number of context losses
* exceeds the maximum positive integer, the function will wrap to 0 and
* continue counting. Returns the number of context losses for this device,
* or negative value upon error.
*/
int omap_pm_get_dev_context_loss_count(struct device *dev);
void omap_pm_enable_off_mode(void);
void omap_pm_disable_off_mode(void);
#endif

15
arch/arm/mach-omap2/pdata-quirks.c
View File

@ -26,14 +26,12 @@
#include <linux/platform_data/iommu-omap.h>
#include <linux/platform_data/ti-sysc.h>
#include <linux/platform_data/wkup_m3.h>
#include <linux/platform_data/media/ir-rx51.h>
#include <linux/platform_data/asoc-ti-mcbsp.h>
#include "common.h"
#include "common-board-devices.h"
#include "control.h"
#include "omap_device.h"
#include "omap-pm.h"
#include "omap-secure.h"
#include "soc.h"
#include "hsmmc.h"
@ -514,18 +512,6 @@ void omap_auxdata_legacy_init(struct device *dev)
dev->platform_data = &twl_gpio_auxdata;
}
static struct ir_rx51_platform_data __maybe_unused rx51_ir_data = {
.set_max_mpu_wakeup_lat = omap_pm_set_max_mpu_wakeup_lat,
};
static struct platform_device __maybe_unused rx51_ir_device = {
.name = "ir_rx51",
.id = -1,
.dev = {
.platform_data = &rx51_ir_data,
},
};
#if IS_ENABLED(CONFIG_SND_OMAP_SOC_MCBSP)
static struct omap_mcbsp_platform_data mcbsp_pdata;
static void __init omap3_mcbsp_init(void)
@ -569,7 +555,6 @@ static struct of_dev_auxdata omap_auxdata_lookup[] = {
"480c9000.smartreflex", &omap_sr_pdata[OMAP_SR_MPU]),
OF_DEV_AUXDATA("ti,omap3-hsmmc", 0x4809c000, "4809c000.mmc", &mmc_pdata[0]),
OF_DEV_AUXDATA("ti,omap3-hsmmc", 0x480b4000, "480b4000.mmc", &mmc_pdata[1]),
OF_DEV_AUXDATA("nokia,n900-ir", 0, "n900-ir", &rx51_ir_data),
/* Only on am3517 */
OF_DEV_AUXDATA("ti,davinci_mdio", 0x5c030000, "davinci_mdio.0", NULL),
OF_DEV_AUXDATA("ti,am3517-emac", 0x5c000000, "davinci_emac.0",

5
arch/arm/mach-omap2/pm-debug.c
View File

@ -31,7 +31,6 @@
#include "clock.h"
#include "powerdomain.h"
#include "clockdomain.h"
#include "omap-pm.h"
#include "soc.h"
#include "cm2xxx_3xxx.h"
@ -240,10 +239,6 @@ static int option_set(void *data, u64 val)
*option = val;
if (option == &enable_off_mode) {
if (val)
omap_pm_enable_off_mode();
else
omap_pm_disable_off_mode();
if (cpu_is_omap34xx())
omap3_pm_off_mode_enable(val);
}

10
arch/arm/mach-omap2/pm.c
View File

@ -16,11 +16,11 @@
#include <linux/pm_opp.h>
#include <linux/export.h>
#include <linux/suspend.h>
#include <linux/clk.h>
#include <linux/cpu.h>
#include <asm/system_misc.h>
#include "omap-pm.h"
#include "omap_device.h"
#include "common.h"
@ -230,14 +230,6 @@ static void __init omap4_init_voltages(void)
omap2_set_init_voltage("iva", "dpll_iva_m5x2_ck", "iva");
}
static int __init omap2_common_pm_init(void)
{
omap_pm_if_init();
return 0;
}
omap_postcore_initcall(omap2_common_pm_init);
int __init omap2_common_pm_late_init(void)
{
/* Init the voltage layer */

1
arch/arm/mach-omap2/timer.c
View File

@ -50,7 +50,6 @@
#include "omap_device.h"
#include <plat/counter-32k.h>
#include <clocksource/timer-ti-dm.h>
#include "omap-pm.h"
#include "soc.h"
#include "common.h"

10
arch/arm/plat-omap/Kconfig
View File

@ -115,16 +115,6 @@ config OMAP_SERIAL_WAKE
to data on the serial RX line. This allows you to wake the
system from serial console.
choice
prompt "OMAP PM layer selection"
depends on ARCH_OMAP
default OMAP_PM_NOOP
config OMAP_PM_NOOP
bool "No-op/debug PM layer"
endchoice
endmenu
endif

17
drivers/media/rc/ir-rx51.c
View File

@ -22,7 +22,6 @@
#include <linux/hrtimer.h>
#include <media/rc-core.h>
#include <linux/platform_data/media/ir-rx51.h>
#define WBUF_LEN 256
@ -31,7 +30,6 @@ struct ir_rx51 {
struct pwm_device *pwm;
struct hrtimer timer;
struct device *dev;
struct ir_rx51_platform_data *pdata;
wait_queue_head_t wqueue;
unsigned int freq; /* carrier frequency */
@ -130,10 +128,9 @@ static int ir_rx51_tx(struct rc_dev *dev, unsigned int *buffer,
ir_rx51->wbuf[count] = -1; /* Insert termination mark */
/*
* Adjust latency requirements so the device doesn't go in too
* deep sleep states
* REVISIT: Adjust latency requirements so the device doesn't go in too
* deep sleep states with pm_qos_add_request().
*/
ir_rx51->pdata->set_max_mpu_wakeup_lat(ir_rx51->dev, 50);
ir_rx51_on(ir_rx51);
ir_rx51->wbuf_index = 1;
@ -146,8 +143,7 @@ static int ir_rx51_tx(struct rc_dev *dev, unsigned int *buffer,
*/
wait_event_interruptible(ir_rx51->wqueue, ir_rx51->wbuf_index < 0);
/* We can sleep again */
ir_rx51->pdata->set_max_mpu_wakeup_lat(ir_rx51->dev, -1);
/* REVISIT: Remove pm_qos constraint, we can sleep again */
return count;
}
@ -244,13 +240,6 @@ static int ir_rx51_probe(struct platform_device *dev)
struct pwm_device *pwm;
struct rc_dev *rcdev;
ir_rx51.pdata = dev->dev.platform_data;
if (!ir_rx51.pdata) {
dev_err(&dev->dev, "Platform Data is missing\n");
return -ENXIO;
}
pwm = pwm_get(&dev->dev, NULL);
if (IS_ERR(pwm)) {
int err = PTR_ERR(pwm);

9
include/linux/platform_data/media/ir-rx51.h
View File

@ -1,9 +0,0 @@
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _IR_RX51_H
#define _IR_RX51_H
struct ir_rx51_platform_data {
int(*set_max_mpu_wakeup_lat)(struct device *dev, long t);
};
#endif