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ARM: OMAP2+: omap_device: remove obsolete pm_lats and early_device code

Browse source 
Remove now-obsolete code from arch/arm/mach-omap2/omap_device.c.  This
mostly consists of removing the first attempt at device PM latency
handling.  This was never really used, has been replaced by the common
dev_pm_qos code, and needs to go away as part of the DT conversion.
Also, the early platform_device creation code has been removed, as it
appears to be unused.

Signed-off-by: Paul Walmsley <paul@pwsan.com>
Cc: Kevin Hilman <khilman@deeprootsystems.com>
This commit is contained in:
Paul Walmsley 2013-01-26 00:48:53 -07:00
commit c1d1cd597f
24 changed files with 99 additions and 610 deletions
Download patch file Download diff file Expand all files Collapse all files

2
arch/arm/mach-omap2/am35xx-emac.c
View file

@ -63,7 +63,7 @@ static int __init omap_davinci_emac_dev_init(struct omap_hwmod *oh,
struct platform_device *pdev;
pdev = omap_device_build(oh->class->name, 0, oh, pdata, pdata_len,
NULL, 0, false);
false);
if (IS_ERR(pdev)) {
WARN(1, "Can't build omap_device for %s:%s.\n",
oh->class->name, oh->name);

25
arch/arm/mach-omap2/devices.c
View file

@ -61,8 +61,7 @@ static int __init omap3_l3_init(void)
if (!oh)
pr_err("could not look up %s\n", oh_name);
pdev = omap_device_build("omap_l3_smx", 0, oh, NULL, 0,
NULL, 0, 0);
pdev = omap_device_build("omap_l3_smx", 0, oh, NULL, 0);
WARN(IS_ERR(pdev), "could not build omap_device for %s\n", oh_name);
@ -96,8 +95,7 @@ static int __init omap4_l3_init(void)
pr_err("could not look up %s\n", oh_name);
}
pdev = omap_device_build_ss("omap_l3_noc", 0, oh, 3, NULL,
0, NULL, 0, 0);
pdev = omap_device_build_ss("omap_l3_noc", 0, oh, 3, NULL, 0);
WARN(IS_ERR(pdev), "could not build omap_device for %s\n", oh_name);
@ -273,7 +271,7 @@ int __init omap4_keyboard_init(struct omap4_keypad_platform_data
keypad_data = sdp4430_keypad_data;
pdev = omap_device_build(name, id, oh, keypad_data,
sizeof(struct omap4_keypad_platform_data), NULL, 0, 0);
sizeof(struct omap4_keypad_platform_data));
if (IS_ERR(pdev)) {
WARN(1, "Can't build omap_device for %s:%s.\n",
@ -297,7 +295,7 @@ static inline void __init omap_init_mbox(void)
return;
}
pdev = omap_device_build("omap-mailbox", -1, oh, NULL, 0, NULL, 0, 0);
pdev = omap_device_build("omap-mailbox", -1, oh, NULL, 0);
WARN(IS_ERR(pdev), "%s: could not build device, err %ld\n",
__func__, PTR_ERR(pdev));
}
@ -337,7 +335,7 @@ static void __init omap_init_mcpdm(void)
return;
}
pdev = omap_device_build("omap-mcpdm", -1, oh, NULL, 0, NULL, 0, 0);
pdev = omap_device_build("omap-mcpdm", -1, oh, NULL, 0);
WARN(IS_ERR(pdev), "Can't build omap_device for omap-mcpdm.\n");
}
#else
@ -358,7 +356,7 @@ static void __init omap_init_dmic(void)
return;
}
pdev = omap_device_build("omap-dmic", -1, oh, NULL, 0, NULL, 0, 0);
pdev = omap_device_build("omap-dmic", -1, oh, NULL, 0);
WARN(IS_ERR(pdev), "Can't build omap_device for omap-dmic.\n");
}
#else
@ -384,8 +382,7 @@ static void __init omap_init_hdmi_audio(void)
return;
}
pdev = omap_device_build("omap-hdmi-audio-dai",
-1, oh, NULL, 0, NULL, 0, 0);
pdev = omap_device_build("omap-hdmi-audio-dai", -1, oh, NULL, 0, 0);
WARN(IS_ERR(pdev),
"Can't build omap_device for omap-hdmi-audio-dai.\n");
@ -429,8 +426,7 @@ static int __init omap_mcspi_init(struct omap_hwmod *oh, void *unused)
}
spi_num++;
pdev = omap_device_build(name, spi_num, oh, pdata,
sizeof(*pdata), NULL, 0, 0);
pdev = omap_device_build(name, spi_num, oh, pdata, sizeof(*pdata));
WARN(IS_ERR(pdev), "Can't build omap_device for %s:%s\n",
name, oh->name);
kfree(pdata);
@ -460,7 +456,7 @@ static void omap_init_rng(void)
if (!oh)
return;
pdev = omap_device_build("omap_rng", -1, oh, NULL, 0, NULL, 0, 0);
pdev = omap_device_build("omap_rng", -1, oh, NULL, 0);
WARN(IS_ERR(pdev), "Can't build omap_device for omap_rng\n");
}
@ -689,8 +685,7 @@ static void __init omap_init_ocp2scp(void)
pdata->dev_cnt = dev_cnt;
pdev = omap_device_build(name, bus_id, oh, pdata, sizeof(*pdata), NULL,
0, false);
pdev = omap_device_build(name, bus_id, oh, pdata, sizeof(*pdata));
if (IS_ERR(pdev)) {
pr_err("Could not build omap_device for %s %s\n",
name, oh_name);

2
arch/arm/mach-omap2/display.c
View file

@ -226,7 +226,7 @@ static struct platform_device *create_dss_pdev(const char *pdev_name,
dev_set_name(&pdev->dev, "%s", pdev->name);
ohs[0] = oh;
od = omap_device_alloc(pdev, ohs, 1, NULL, 0);
od = omap_device_alloc(pdev, ohs, 1);
if (IS_ERR(od)) {
pr_err("Could not alloc omap_device for %s\n", pdev_name);
r = -ENOMEM;

2
arch/arm/mach-omap2/dma.c
View file

@ -248,7 +248,7 @@ static int __init omap2_system_dma_init_dev(struct omap_hwmod *oh, void *unused)
p->errata = configure_dma_errata();
pdev = omap_device_build(name, 0, oh, p, sizeof(*p), NULL, 0, 0);
pdev = omap_device_build(name, 0, oh, p, sizeof(*p));
kfree(p);
if (IS_ERR(pdev)) {
pr_err("%s: Can't build omap_device for %s:%s.\n",

3
arch/arm/mach-omap2/drm.c
View file

@ -51,8 +51,7 @@ static int __init omap_init_drm(void)
oh = omap_hwmod_lookup("dmm");
if (oh) {
pdev = omap_device_build(oh->name, -1, oh, NULL, 0, NULL, 0,
false);
pdev = omap_device_build(oh->name, -1, oh, NULL, 0);
WARN(IS_ERR(pdev), "Could not build omap_device for %s\n",
oh->name);
}

3
arch/arm/mach-omap2/gpio.c
View file

@ -131,8 +131,7 @@ static int __init omap2_gpio_dev_init(struct omap_hwmod *oh, void *unused)
pwrdm = omap_hwmod_get_pwrdm(oh);
pdata->loses_context = pwrdm_can_ever_lose_context(pwrdm);
pdev = omap_device_build(name, id - 1, oh, pdata,
sizeof(*pdata), NULL, 0, false);
pdev = omap_device_build(name, id - 1, oh, pdata, sizeof(*pdata));
kfree(pdata);
if (IS_ERR(pdev)) {

2
arch/arm/mach-omap2/gpmc.c
View file

@ -1220,7 +1220,7 @@ static int __init omap_gpmc_init(void)
return -ENODEV;
}
pdev = omap_device_build(DEVICE_NAME, -1, oh, NULL, 0, NULL, 0, 0);
pdev = omap_device_build(DEVICE_NAME, -1, oh, NULL, 0);
WARN(IS_ERR(pdev), "could not build omap_device for %s\n", oh_name);
return IS_ERR(pdev) ? PTR_ERR(pdev) : 0;

2
arch/arm/mach-omap2/hdq1w.c
View file

@ -87,7 +87,7 @@ static int __init omap_init_hdq(void)
if (!oh)
return 0;
pdev = omap_device_build(devname, id, oh, NULL, 0, NULL, 0, 0);
pdev = omap_device_build(devname, id, oh, NULL, 0);
WARN(IS_ERR(pdev), "Can't build omap_device for %s:%s.\n",
devname, oh->name);

2
arch/arm/mach-omap2/hsmmc.c
View file

@ -522,7 +522,7 @@ static void __init omap_hsmmc_init_one(struct omap2_hsmmc_info *hsmmcinfo,
}
dev_set_name(&pdev->dev, "%s.%d", pdev->name, pdev->id);
od = omap_device_alloc(pdev, ohs, 1, NULL, 0);
od = omap_device_alloc(pdev, ohs, 1);
if (IS_ERR(od)) {
pr_err("Could not allocate od for %s\n", name);
goto put_pdev;

3
arch/arm/mach-omap2/hwspinlock.c
View file

@ -46,8 +46,7 @@ static int __init hwspinlocks_init(void)
return -EINVAL;
pdev = omap_device_build(dev_name, 0, oh, &omap_hwspinlock_pdata,
sizeof(struct hwspinlock_pdata),
NULL, 0, false);
sizeof(struct hwspinlock_pdata));
if (IS_ERR(pdev)) {
pr_err("Can't build omap_device for %s:%s\n", dev_name,
oh_name);

3
arch/arm/mach-omap2/i2c.c
View file

@ -178,8 +178,7 @@ int __init omap_i2c_add_bus(struct omap_i2c_bus_platform_data *i2c_pdata,
if (cpu_is_omap34xx())
pdata->set_mpu_wkup_lat = omap_pm_set_max_mpu_wakeup_lat_compat;
pdev = omap_device_build(name, bus_id, oh, pdata,
sizeof(struct omap_i2c_bus_platform_data),
NULL, 0, 0);
sizeof(struct omap_i2c_bus_platform_data));
WARN(IS_ERR(pdev), "Could not build omap_device for %s\n", name);
return PTR_RET(pdev);

2
arch/arm/mach-omap2/mcbsp.c
View file

@ -101,7 +101,7 @@ static int __init omap_init_mcbsp(struct omap_hwmod *oh, void *unused)
count++;
}
pdev = omap_device_build_ss(name, id, oh_device, count, pdata,
sizeof(*pdata), NULL, 0, false);
sizeof(*pdata));
kfree(pdata);
if (IS_ERR(pdev)) {
pr_err("%s: Can't build omap_device for %s:%s.\n", __func__,

2
arch/arm/mach-omap2/msdi.c
View file

@ -150,7 +150,7 @@ void __init omap242x_init_mmc(struct omap_mmc_platform_data **mmc_data)
return;
}
pdev = omap_device_build(dev_name, id, oh, mmc_data[0],
sizeof(struct omap_mmc_platform_data), NULL, 0, 0);
sizeof(struct omap_mmc_platform_data));
if (IS_ERR(pdev))
WARN(1, "Can'd build omap_device for %s:%s.\n",
dev_name, oh->name);

3
arch/arm/mach-omap2/omap-iommu.c
View file

@ -41,8 +41,7 @@ static int __init omap_iommu_dev_init(struct omap_hwmod *oh, void *unused)
pdata->deassert_reset = omap_device_deassert_hardreset;
}
pdev = omap_device_build("omap-iommu", i, oh, pdata, sizeof(*pdata),
NULL, 0, 0);
pdev = omap_device_build("omap-iommu", i, oh, pdata, sizeof(*pdata));
kfree(pdata);

535
arch/arm/mach-omap2/omap_device.c
View file

@ -17,68 +17,15 @@
* to control power management and interconnect properties of their
* devices.
*
* In the medium- to long-term, this code should either be
* a) implemented via arch-specific pointers in platform_data
* or
* b) implemented as a proper omap_bus/omap_device in Linux, no more
* platform_data func pointers
* In the medium- to long-term, this code should be implemented as a
* proper omap_bus/omap_device in Linux, no more platform_data func
* pointers
*
*
* Guidelines for usage by driver authors:
*
* 1. These functions are intended to be used by device drivers via
* function pointers in struct platform_data. As an example,
* omap_device_enable() should be passed to the driver as
*
* struct foo_driver_platform_data {
* ...
* int (*device_enable)(struct platform_device *pdev);
* ...
* }
*
* Note that the generic "device_enable" name is used, rather than
* "omap_device_enable". This is so other architectures can pass in their
* own enable/disable functions here.
*
* This should be populated during device setup:
*
* ...
* pdata->device_enable = omap_device_enable;
* ...
*
* 2. Drivers should first check to ensure the function pointer is not null
* before calling it, as in:
*
* if (pdata->device_enable)
* pdata->device_enable(pdev);
*
* This allows other architectures that don't use similar device_enable()/
* device_shutdown() functions to execute normally.
*
* ...
*
* Suggested usage by device drivers:
*
* During device initialization:
* device_enable()
*
* During device idle:
* (save remaining device context if necessary)
* device_idle();
*
* During device resume:
* device_enable();
* (restore context if necessary)
*
* During device shutdown:
* device_shutdown()
* (device must be reinitialized at this point to use it again)
*
*/
#undef DEBUG
#include <linux/kernel.h>
#include <linux/export.h>
#include <linux/platform_device.h>
#include <linux/slab.h>
#include <linux/err.h>
@ -92,155 +39,8 @@
#include "omap_device.h"
#include "omap_hwmod.h"
/* These parameters are passed to _omap_device_{de,}activate() */
#define USE_WAKEUP_LAT 0
#define IGNORE_WAKEUP_LAT 1
static int omap_early_device_register(struct platform_device *pdev);
static struct omap_device_pm_latency omap_default_latency[] = {
{
.deactivate_func = omap_device_idle_hwmods,
.activate_func = omap_device_enable_hwmods,
.flags = OMAP_DEVICE_LATENCY_AUTO_ADJUST,
}
};
/* Private functions */
/**
* _omap_device_activate - increase device readiness
* @od: struct omap_device *
* @ignore_lat: increase to latency target (0) or full readiness (1)?
*
* Increase readiness of omap_device @od (thus decreasing device
* wakeup latency, but consuming more power). If @ignore_lat is
* IGNORE_WAKEUP_LAT, make the omap_device fully active. Otherwise,
* if @ignore_lat is USE_WAKEUP_LAT, and the device's maximum wakeup
* latency is greater than the requested maximum wakeup latency, step
* backwards in the omap_device_pm_latency table to ensure the
* device's maximum wakeup latency is less than or equal to the
* requested maximum wakeup latency. Returns 0.
*/
static int _omap_device_activate(struct omap_device *od, u8 ignore_lat)
{
struct timespec a, b, c;
dev_dbg(&od->pdev->dev, "omap_device: activating\n");
while (od->pm_lat_level > 0) {
struct omap_device_pm_latency *odpl;
unsigned long long act_lat = 0;
od->pm_lat_level--;
odpl = od->pm_lats + od->pm_lat_level;
if (!ignore_lat &&
(od->dev_wakeup_lat <= od->_dev_wakeup_lat_limit))
break;
read_persistent_clock(&a);
/* XXX check return code */
odpl->activate_func(od);
read_persistent_clock(&b);
c = timespec_sub(b, a);
act_lat = timespec_to_ns(&c);
dev_dbg(&od->pdev->dev,
"omap_device: pm_lat %d: activate: elapsed time %llu nsec\n",
od->pm_lat_level, act_lat);
if (act_lat > odpl->activate_lat) {
odpl->activate_lat_worst = act_lat;
if (odpl->flags & OMAP_DEVICE_LATENCY_AUTO_ADJUST) {
odpl->activate_lat = act_lat;
dev_dbg(&od->pdev->dev,
"new worst case activate latency %d: %llu\n",
od->pm_lat_level, act_lat);
} else
dev_warn(&od->pdev->dev,
"activate latency %d higher than expected. (%llu > %d)\n",
od->pm_lat_level, act_lat,
odpl->activate_lat);
}
od->dev_wakeup_lat -= odpl->activate_lat;
}
return 0;
}
/**
* _omap_device_deactivate - decrease device readiness
* @od: struct omap_device *
* @ignore_lat: decrease to latency target (0) or full inactivity (1)?
*
* Decrease readiness of omap_device @od (thus increasing device
* wakeup latency, but conserving power). If @ignore_lat is
* IGNORE_WAKEUP_LAT, make the omap_device fully inactive. Otherwise,
* if @ignore_lat is USE_WAKEUP_LAT, and the device's maximum wakeup
* latency is less than the requested maximum wakeup latency, step
* forwards in the omap_device_pm_latency table to ensure the device's
* maximum wakeup latency is less than or equal to the requested
* maximum wakeup latency. Returns 0.
*/
static int _omap_device_deactivate(struct omap_device *od, u8 ignore_lat)
{
struct timespec a, b, c;
dev_dbg(&od->pdev->dev, "omap_device: deactivating\n");
while (od->pm_lat_level < od->pm_lats_cnt) {
struct omap_device_pm_latency *odpl;
unsigned long long deact_lat = 0;
odpl = od->pm_lats + od->pm_lat_level;
if (!ignore_lat &&
((od->dev_wakeup_lat + odpl->activate_lat) >
od->_dev_wakeup_lat_limit))
break;
read_persistent_clock(&a);
/* XXX check return code */
odpl->deactivate_func(od);
read_persistent_clock(&b);
c = timespec_sub(b, a);
deact_lat = timespec_to_ns(&c);
dev_dbg(&od->pdev->dev,
"omap_device: pm_lat %d: deactivate: elapsed time %llu nsec\n",
od->pm_lat_level, deact_lat);
if (deact_lat > odpl->deactivate_lat) {
odpl->deactivate_lat_worst = deact_lat;
if (odpl->flags & OMAP_DEVICE_LATENCY_AUTO_ADJUST) {
odpl->deactivate_lat = deact_lat;
dev_dbg(&od->pdev->dev,
"new worst case deactivate latency %d: %llu\n",
od->pm_lat_level, deact_lat);
} else
dev_warn(&od->pdev->dev,
"deactivate latency %d higher than expected. (%llu > %d)\n",
od->pm_lat_level, deact_lat,
odpl->deactivate_lat);
}
od->dev_wakeup_lat += odpl->activate_lat;
od->pm_lat_level++;
}
return 0;
}
static void _add_clkdev(struct omap_device *od, const char *clk_alias,
const char *clk_name)
{
@ -315,9 +115,6 @@ static void _add_hwmod_clocks_clkdev(struct omap_device *od,
* @oh: ptr to the single omap_hwmod that backs this omap_device
* @pdata: platform_data ptr to associate with the platform_device
* @pdata_len: amount of memory pointed to by @pdata
* @pm_lats: pointer to a omap_device_pm_latency array for this device
* @pm_lats_cnt: ARRAY_SIZE() of @pm_lats
* @is_early_device: should the device be registered as an early device or not
*
* Function for building an omap_device already registered from device-tree
*
@ -356,7 +153,7 @@ static int omap_device_build_from_dt(struct platform_device *pdev)
hwmods[i] = oh;
}
od = omap_device_alloc(pdev, hwmods, oh_cnt, NULL, 0);
od = omap_device_alloc(pdev, hwmods, oh_cnt);
if (!od) {
dev_err(&pdev->dev, "Cannot allocate omap_device for :%s\n",
oh_name);
@ -407,6 +204,39 @@ static int _omap_device_notifier_call(struct notifier_block *nb,
return NOTIFY_DONE;
}
/**
* _omap_device_enable_hwmods - call omap_hwmod_enable() on all hwmods
* @od: struct omap_device *od
*
* Enable all underlying hwmods. Returns 0.
*/
static int _omap_device_enable_hwmods(struct omap_device *od)
{
int i;
for (i = 0; i < od->hwmods_cnt; i++)
omap_hwmod_enable(od->hwmods[i]);
/* XXX pass along return value here? */
return 0;
}
/**
* _omap_device_idle_hwmods - call omap_hwmod_idle() on all hwmods
* @od: struct omap_device *od
*
* Idle all underlying hwmods. Returns 0.
*/
static int _omap_device_idle_hwmods(struct omap_device *od)
{
int i;
for (i = 0; i < od->hwmods_cnt; i++)
omap_hwmod_idle(od->hwmods[i]);
/* XXX pass along return value here? */
return 0;
}
/* Public functions for use by core code */
@ -526,18 +356,14 @@ static int _od_fill_dma_resources(struct omap_device *od,
* @oh: ptr to the single omap_hwmod that backs this omap_device
* @pdata: platform_data ptr to associate with the platform_device
* @pdata_len: amount of memory pointed to by @pdata
* @pm_lats: pointer to a omap_device_pm_latency array for this device
* @pm_lats_cnt: ARRAY_SIZE() of @pm_lats
*
* Convenience function for allocating an omap_device structure and filling
* hwmods, resources and pm_latency attributes.
* hwmods, and resources.
*
* Returns an struct omap_device pointer or ERR_PTR() on error;
*/
struct omap_device *omap_device_alloc(struct platform_device *pdev,
struct omap_hwmod **ohs, int oh_cnt,
struct omap_device_pm_latency *pm_lats,
int pm_lats_cnt)
struct omap_hwmod **ohs, int oh_cnt)
{
int ret = -ENOMEM;
struct omap_device *od;
@ -626,18 +452,6 @@ struct omap_device *omap_device_alloc(struct platform_device *pdev,
goto oda_exit3;
have_everything:
if (!pm_lats) {
pm_lats = omap_default_latency;
pm_lats_cnt = ARRAY_SIZE(omap_default_latency);
}
od->pm_lats_cnt = pm_lats_cnt;
od->pm_lats = kmemdup(pm_lats,
sizeof(struct omap_device_pm_latency) * pm_lats_cnt,
GFP_KERNEL);
if (!od->pm_lats)
goto oda_exit3;
pdev->archdata.od = od;
for (i = 0; i < oh_cnt; i++) {
@ -663,7 +477,6 @@ void omap_device_delete(struct omap_device *od)
return;
od->pdev->archdata.od = NULL;
kfree(od->pm_lats);
kfree(od->hwmods);
kfree(od);
}
@ -675,9 +488,6 @@ void omap_device_delete(struct omap_device *od)
* @oh: ptr to the single omap_hwmod that backs this omap_device
* @pdata: platform_data ptr to associate with the platform_device
* @pdata_len: amount of memory pointed to by @pdata
* @pm_lats: pointer to a omap_device_pm_latency array for this device
* @pm_lats_cnt: ARRAY_SIZE() of @pm_lats
* @is_early_device: should the device be registered as an early device or not
*
* Convenience function for building and registering a single
* omap_device record, which in turn builds and registers a
@ -685,11 +495,10 @@ void omap_device_delete(struct omap_device *od)
* information. Returns ERR_PTR(-EINVAL) if @oh is NULL; otherwise,
* passes along the return value of omap_device_build_ss().
*/
struct platform_device __init *omap_device_build(const char *pdev_name, int pdev_id,
struct omap_hwmod *oh, void *pdata,
int pdata_len,
struct omap_device_pm_latency *pm_lats,
int pm_lats_cnt, int is_early_device)
struct platform_device __init *omap_device_build(const char *pdev_name,
int pdev_id,
struct omap_hwmod *oh,
void *pdata, int pdata_len)
{
struct omap_hwmod *ohs[] = { oh };
@ -697,8 +506,7 @@ struct platform_device __init *omap_device_build(const char *pdev_name, int pdev
return ERR_PTR(-EINVAL);
return omap_device_build_ss(pdev_name, pdev_id, ohs, 1, pdata,
pdata_len, pm_lats, pm_lats_cnt,
is_early_device);
pdata_len);
}
/**
@ -708,9 +516,6 @@ struct platform_device __init *omap_device_build(const char *pdev_name, int pdev
* @oh: ptr to the single omap_hwmod that backs this omap_device
* @pdata: platform_data ptr to associate with the platform_device
* @pdata_len: amount of memory pointed to by @pdata
* @pm_lats: pointer to a omap_device_pm_latency array for this device
* @pm_lats_cnt: ARRAY_SIZE() of @pm_lats
* @is_early_device: should the device be registered as an early device or not
*
* Convenience function for building and registering an omap_device
* subsystem record. Subsystem records consist of multiple
@ -718,11 +523,11 @@ struct platform_device __init *omap_device_build(const char *pdev_name, int pdev
* platform_device record. Returns an ERR_PTR() on error, or passes
* along the return value of omap_device_register().
*/
struct platform_device __init *omap_device_build_ss(const char *pdev_name, int pdev_id,
struct omap_hwmod **ohs, int oh_cnt,
void *pdata, int pdata_len,
struct omap_device_pm_latency *pm_lats,
int pm_lats_cnt, int is_early_device)
struct platform_device __init *omap_device_build_ss(const char *pdev_name,
int pdev_id,
struct omap_hwmod **ohs,
int oh_cnt, void *pdata,
int pdata_len)
{
int ret = -ENOMEM;
struct platform_device *pdev;
@ -746,7 +551,7 @@ struct platform_device __init *omap_device_build_ss(const char *pdev_name, int p
else
dev_set_name(&pdev->dev, "%s", pdev->name);
od = omap_device_alloc(pdev, ohs, oh_cnt, pm_lats, pm_lats_cnt);
od = omap_device_alloc(pdev, ohs, oh_cnt);
if (IS_ERR(od))
goto odbs_exit1;
@ -754,9 +559,6 @@ struct platform_device __init *omap_device_build_ss(const char *pdev_name, int p
if (ret)
goto odbs_exit2;
if (is_early_device)
ret = omap_early_device_register(pdev);
else
ret = omap_device_register(pdev);
if (ret)
goto odbs_exit2;
@ -774,24 +576,6 @@ odbs_exit:
return ERR_PTR(ret);
}
/**
* omap_early_device_register - register an omap_device as an early platform
* device.
* @od: struct omap_device * to register
*
* Register the omap_device structure. This currently just calls
* platform_early_add_device() on the underlying platform_device.
* Returns 0 by default.
*/
static int __init omap_early_device_register(struct platform_device *pdev)
{
struct platform_device *devices[1];
devices[0] = pdev;
early_platform_add_devices(devices, 1);
return 0;
}
#ifdef CONFIG_PM_RUNTIME
static int _od_runtime_suspend(struct device *dev)
{
@ -902,10 +686,9 @@ int omap_device_register(struct platform_device *pdev)
* to be accessible and ready to operate. This generally involves
* enabling clocks, setting SYSCONFIG registers; and in the future may
* involve remuxing pins. Device drivers should call this function
* (through platform_data function pointers) where they would normally
* enable clocks, etc. Returns -EINVAL if called when the omap_device
* is already enabled, or passes along the return value of
* _omap_device_activate().
* indirectly via pm_runtime_get*(). Returns -EINVAL if called when
* the omap_device is already enabled, or passes along the return
* value of _omap_device_enable_hwmods().
*/
int omap_device_enable(struct platform_device *pdev)
{
@ -921,14 +704,8 @@ int omap_device_enable(struct platform_device *pdev)
return -EINVAL;
}
/* Enable everything if we're enabling this device from scratch */
if (od->_state == OMAP_DEVICE_STATE_UNKNOWN)
od->pm_lat_level = od->pm_lats_cnt;
ret = _omap_device_enable_hwmods(od);
ret = _omap_device_activate(od, IGNORE_WAKEUP_LAT);
od->dev_wakeup_lat = 0;
od->_dev_wakeup_lat_limit = UINT_MAX;
od->_state = OMAP_DEVICE_STATE_ENABLED;
return ret;
@ -938,14 +715,10 @@ int omap_device_enable(struct platform_device *pdev)
* omap_device_idle - idle an omap_device
* @od: struct omap_device * to idle
*
* Idle omap_device @od by calling as many .deactivate_func() entries
* in the omap_device's pm_lats table as is possible without exceeding
* the device's maximum wakeup latency limit, pm_lat_limit. Device
* drivers should call this function (through platform_data function
* pointers) where they would normally disable clocks after operations
* complete, etc.. Returns -EINVAL if the omap_device is not
* Idle omap_device @od. Device drivers call this function indirectly
* via pm_runtime_put*(). Returns -EINVAL if the omap_device is not
* currently enabled, or passes along the return value of
* _omap_device_deactivate().
* _omap_device_idle_hwmods().
*/
int omap_device_idle(struct platform_device *pdev)
{
@ -961,49 +734,13 @@ int omap_device_idle(struct platform_device *pdev)
return -EINVAL;
}
ret = _omap_device_deactivate(od, USE_WAKEUP_LAT);
ret = _omap_device_idle_hwmods(od);
od->_state = OMAP_DEVICE_STATE_IDLE;
return ret;
}
/**
* omap_device_shutdown - shut down an omap_device
* @od: struct omap_device * to shut down
*
* Shut down omap_device @od by calling all .deactivate_func() entries
* in the omap_device's pm_lats table and then shutting down all of
* the underlying omap_hwmods. Used when a device is being "removed"
* or a device driver is being unloaded. Returns -EINVAL if the
* omap_device is not currently enabled or idle, or passes along the
* return value of _omap_device_deactivate().
*/
int omap_device_shutdown(struct platform_device *pdev)
{
int ret, i;
struct omap_device *od;
od = to_omap_device(pdev);
if (od->_state != OMAP_DEVICE_STATE_ENABLED &&
od->_state != OMAP_DEVICE_STATE_IDLE) {
dev_warn(&pdev->dev,
"omap_device: %s() called from invalid state %d\n",
__func__, od->_state);
return -EINVAL;
}
ret = _omap_device_deactivate(od, IGNORE_WAKEUP_LAT);
for (i = 0; i < od->hwmods_cnt; i++)
omap_hwmod_shutdown(od->hwmods[i]);
od->_state = OMAP_DEVICE_STATE_SHUTDOWN;
return ret;
}
/**
* omap_device_assert_hardreset - set a device's hardreset line
* @pdev: struct platform_device * to reset
@ -1059,86 +796,6 @@ int omap_device_deassert_hardreset(struct platform_device *pdev,
return ret;
}
/**
* omap_device_align_pm_lat - activate/deactivate device to match wakeup lat lim
* @od: struct omap_device *
*
* When a device's maximum wakeup latency limit changes, call some of
* the .activate_func or .deactivate_func function pointers in the
* omap_device's pm_lats array to ensure that the device's maximum
* wakeup latency is less than or equal to the new latency limit.
* Intended to be called by OMAP PM code whenever a device's maximum
* wakeup latency limit changes (e.g., via
* omap_pm_set_dev_wakeup_lat()). Returns 0 if nothing needs to be
* done (e.g., if the omap_device is not currently idle, or if the
* wakeup latency is already current with the new limit) or passes
* along the return value of _omap_device_deactivate() or
* _omap_device_activate().
*/
int omap_device_align_pm_lat(struct platform_device *pdev,
u32 new_wakeup_lat_limit)
{
int ret = -EINVAL;
struct omap_device *od;
od = to_omap_device(pdev);
if (new_wakeup_lat_limit == od->dev_wakeup_lat)
return 0;
od->_dev_wakeup_lat_limit = new_wakeup_lat_limit;
if (od->_state != OMAP_DEVICE_STATE_IDLE)
return 0;
else if (new_wakeup_lat_limit > od->dev_wakeup_lat)
ret = _omap_device_deactivate(od, USE_WAKEUP_LAT);
else if (new_wakeup_lat_limit < od->dev_wakeup_lat)
ret = _omap_device_activate(od, USE_WAKEUP_LAT);
return ret;
}
/**
* omap_device_get_pwrdm - return the powerdomain * associated with @od
* @od: struct omap_device *
*
* Return the powerdomain associated with the first underlying
* omap_hwmod for this omap_device. Intended for use by core OMAP PM
* code. Returns NULL on error or a struct powerdomain * upon
* success.
*/
struct powerdomain *omap_device_get_pwrdm(struct omap_device *od)
{
/*
* XXX Assumes that all omap_hwmod powerdomains are identical.
* This may not necessarily be true. There should be a sanity
* check in here to WARN() if any difference appears.
*/
if (!od->hwmods_cnt)
return NULL;
return omap_hwmod_get_pwrdm(od->hwmods[0]);
}
/**
* omap_device_get_mpu_rt_va - return the MPU's virtual addr for the hwmod base
* @od: struct omap_device *
*
* Return the MPU's virtual address for the base of the hwmod, from
* the ioremap() that the hwmod code does. Only valid if there is one
* hwmod associated with this device. Returns NULL if there are zero
* or more than one hwmods associated with this omap_device;
* otherwise, passes along the return value from
* omap_hwmod_get_mpu_rt_va().
*/
void __iomem *omap_device_get_rt_va(struct omap_device *od)
{
if (od->hwmods_cnt != 1)
return NULL;
return omap_hwmod_get_mpu_rt_va(od->hwmods[0]);
}
/**
* omap_device_get_by_hwmod_name() - convert a hwmod name to
* device pointer.
@ -1173,82 +830,6 @@ struct device *omap_device_get_by_hwmod_name(const char *oh_name)
return &oh->od->pdev->dev;
}
EXPORT_SYMBOL(omap_device_get_by_hwmod_name);
/*
* Public functions intended for use in omap_device_pm_latency
* .activate_func and .deactivate_func function pointers
*/
/**
* omap_device_enable_hwmods - call omap_hwmod_enable() on all hwmods
* @od: struct omap_device *od
*
* Enable all underlying hwmods. Returns 0.
*/
int omap_device_enable_hwmods(struct omap_device *od)
{
int i;
for (i = 0; i < od->hwmods_cnt; i++)
omap_hwmod_enable(od->hwmods[i]);
/* XXX pass along return value here? */
return 0;
}
/**
* omap_device_idle_hwmods - call omap_hwmod_idle() on all hwmods
* @od: struct omap_device *od
*
* Idle all underlying hwmods. Returns 0.
*/
int omap_device_idle_hwmods(struct omap_device *od)
{
int i;
for (i = 0; i < od->hwmods_cnt; i++)
omap_hwmod_idle(od->hwmods[i]);
/* XXX pass along return value here? */
return 0;
}
/**
* omap_device_disable_clocks - disable all main and interface clocks
* @od: struct omap_device *od
*
* Disable the main functional clock and interface clock for all of the
* omap_hwmods associated with the omap_device. Returns 0.
*/
int omap_device_disable_clocks(struct omap_device *od)
{
int i;
for (i = 0; i < od->hwmods_cnt; i++)
omap_hwmod_disable_clocks(od->hwmods[i]);
/* XXX pass along return value here? */
return 0;
}
/**
* omap_device_enable_clocks - enable all main and interface clocks
* @od: struct omap_device *od
*
* Enable the main functional clock and interface clock for all of the
* omap_hwmods associated with the omap_device. Returns 0.
*/
int omap_device_enable_clocks(struct omap_device *od)
{
int i;
for (i = 0; i < od->hwmods_cnt; i++)
omap_hwmod_enable_clocks(od->hwmods[i]);
/* XXX pass along return value here? */
return 0;
}
static struct notifier_block platform_nb = {
.notifier_call = _omap_device_notifier_call,

73
arch/arm/mach-omap2/omap_device.h
View file

@ -13,20 +13,12 @@
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* Eventually this type of functionality should either be
* a) implemented via arch-specific pointers in platform_device
* or
* b) implemented as a proper omap_bus/omap_device in Linux, no more
* platform_device
* This type of functionality should be implemented as a proper
* omap_bus/omap_device in Linux.
*
* omap_device differs from omap_hwmod in that it includes external
* (e.g., board- and system-level) integration details. omap_hwmod
* stores hardware data that is invariant for a given OMAP chip.
*
* To do:
* - GPIO integration
* - regulator integration
*
*/
#ifndef __ARCH_ARM_PLAT_OMAP_INCLUDE_MACH_OMAP_DEVICE_H
#define __ARCH_ARM_PLAT_OMAP_INCLUDE_MACH_OMAP_DEVICE_H
@ -53,11 +45,6 @@ extern struct dev_pm_domain omap_device_pm_domain;
* @pdev: platform_device
* @hwmods: (one .. many per omap_device)
* @hwmods_cnt: ARRAY_SIZE() of @hwmods
* @pm_lats: ptr to an omap_device_pm_latency table
* @pm_lats_cnt: ARRAY_SIZE() of what is passed to @pm_lats
* @pm_lat_level: array index of the last odpl entry executed - -1 if never
* @dev_wakeup_lat: dev wakeup latency in nanoseconds
* @_dev_wakeup_lat_limit: dev wakeup latency limit in nsec - set by OMAP PM
* @_state: one of OMAP_DEVICE_STATE_* (see above)
* @flags: device flags
* @_driver_status: one of BUS_NOTIFY_*_DRIVER from <linux/device.h>
@ -71,12 +58,7 @@ extern struct dev_pm_domain omap_device_pm_domain;
struct omap_device {
struct platform_device *pdev;
struct omap_hwmod **hwmods;
struct omap_device_pm_latency *pm_lats;
u32 dev_wakeup_lat;
u32 _dev_wakeup_lat_limit;
unsigned long _driver_status;
u8 pm_lats_cnt;
s8 pm_lat_level;
u8 hwmods_cnt;
u8 _state;
u8 flags;
@ -86,36 +68,25 @@ struct omap_device {
int omap_device_enable(struct platform_device *pdev);
int omap_device_idle(struct platform_device *pdev);
int omap_device_shutdown(struct platform_device *pdev);
/* Core code interface */
struct platform_device *omap_device_build(const char *pdev_name, int pdev_id,
struct omap_hwmod *oh, void *pdata,
int pdata_len,
struct omap_device_pm_latency *pm_lats,
int pm_lats_cnt, int is_early_device);
int pdata_len);
struct platform_device *omap_device_build_ss(const char *pdev_name, int pdev_id,
struct omap_hwmod **oh, int oh_cnt,
void *pdata, int pdata_len,
struct omap_device_pm_latency *pm_lats,
int pm_lats_cnt, int is_early_device);
void *pdata, int pdata_len);
struct omap_device *omap_device_alloc(struct platform_device *pdev,
struct omap_hwmod **ohs, int oh_cnt,
struct omap_device_pm_latency *pm_lats,
int pm_lats_cnt);
struct omap_hwmod **ohs, int oh_cnt);
void omap_device_delete(struct omap_device *od);
int omap_device_register(struct platform_device *pdev);
void __iomem *omap_device_get_rt_va(struct omap_device *od);
struct device *omap_device_get_by_hwmod_name(const char *oh_name);
/* OMAP PM interface */
int omap_device_align_pm_lat(struct platform_device *pdev,
u32 new_wakeup_lat_limit);
struct powerdomain *omap_device_get_pwrdm(struct omap_device *od);
int omap_device_get_context_loss_count(struct platform_device *pdev);
/* Other */
@ -124,40 +95,6 @@ int omap_device_assert_hardreset(struct platform_device *pdev,
const char *name);
int omap_device_deassert_hardreset(struct platform_device *pdev,
const char *name);
int omap_device_idle_hwmods(struct omap_device *od);
int omap_device_enable_hwmods(struct omap_device *od);
int omap_device_disable_clocks(struct omap_device *od);
int omap_device_enable_clocks(struct omap_device *od);
/*
* Entries should be kept in latency order ascending
*
* deact_lat is the maximum number of microseconds required to complete
* deactivate_func() at the device's slowest OPP.
*
* act_lat is the maximum number of microseconds required to complete
* activate_func() at the device's slowest OPP.
*
* This will result in some suboptimal power management decisions at fast
* OPPs, but avoids having to recompute all device power management decisions
* if the system shifts from a fast OPP to a slow OPP (in order to meet
* latency requirements).
*
* XXX should deactivate_func/activate_func() take platform_device pointers
* rather than omap_device pointers?
*/
struct omap_device_pm_latency {
u32 deactivate_lat;
u32 deactivate_lat_worst;
int (*deactivate_func)(struct omap_device *od);
u32 activate_lat;
u32 activate_lat_worst;
int (*activate_func)(struct omap_device *od);
u32 flags;
};
#define OMAP_DEVICE_LATENCY_AUTO_ADJUST BIT(1)
/* Get omap_device pointer from platform_device pointer */
static inline struct omap_device *to_omap_device(struct platform_device *pdev)

4
arch/arm/mach-omap2/pm.c
View file

@ -32,8 +32,6 @@
#include "pm.h"
#include "twl-common.h"
static struct omap_device_pm_latency *pm_lats;
/*
* omap_pm_suspend: points to a function that does the SoC-specific
* suspend work
@ -82,7 +80,7 @@ static int __init _init_omap_device(char *name)
__func__, name))
return -ENODEV;
pdev = omap_device_build(oh->name, 0, oh, NULL, 0, pm_lats, 0, false);
pdev = omap_device_build(oh->name, 0, oh, NULL, 0);
if (WARN(IS_ERR(pdev), "%s: could not build omap_device for %s\n",
__func__, name))
return -ENODEV;

3
arch/arm/mach-omap2/pmu.c
View file

@ -48,8 +48,7 @@ static int __init omap2_init_pmu(unsigned oh_num, char *oh_names[])
}
}
omap_pmu_dev = omap_device_build_ss(dev_name, -1, oh, oh_num, NULL, 0,
NULL, 0, 0);
omap_pmu_dev = omap_device_build_ss(dev_name, -1, oh, oh_num, NULL, 0);
WARN(IS_ERR(omap_pmu_dev), "Can't build omap_device for %s.\n",
dev_name);

3
arch/arm/mach-omap2/serial.c
View file

@ -316,8 +316,7 @@ void __init omap_serial_init_port(struct omap_board_data *bdata,
if (WARN_ON(!oh))
return;
pdev = omap_device_build(name, uart->num, oh, pdata, pdata_size,
NULL, 0, false);
pdev = omap_device_build(name, uart->num, oh, pdata, pdata_size);
if (IS_ERR(pdev)) {
WARN(1, "Could not build omap_device for %s: %s.\n", name,
oh->name);

3
arch/arm/mach-omap2/sr_device.c
View file

@ -152,8 +152,7 @@ static int __init sr_dev_init(struct omap_hwmod *oh, void *user)
sr_data->enable_on_init = sr_enable_on_init;
pdev = omap_device_build(name, i, oh, sr_data, sizeof(*sr_data),
NULL, 0, 0);
pdev = omap_device_build(name, i, oh, sr_data, sizeof(*sr_data), 0);
if (IS_ERR(pdev))
pr_warning("%s: Could not build omap_device for %s: %s.\n\n",
__func__, name, oh->name);

3
arch/arm/mach-omap2/timer.c
View file

@ -702,8 +702,7 @@ static int __init omap_timer_init(struct omap_hwmod *oh, void *unused)
pdata->timer_errata = omap_dm_timer_get_errata();
pdata->get_context_loss_count = omap_pm_get_dev_context_loss_count;
pdev = omap_device_build(name, id, oh, pdata, sizeof(*pdata),
NULL, 0, 0);
pdev = omap_device_build(name, id, oh, pdata, sizeof(*pdata));
if (IS_ERR(pdev)) {
pr_err("%s: Can't build omap_device for %s: %s.\n",

16
arch/arm/mach-omap2/usb-host.c
View file

@ -42,14 +42,6 @@ static struct usbtll_omap_platform_data usbtll_data;
static struct ehci_hcd_omap_platform_data ehci_data;
static struct ohci_hcd_omap_platform_data ohci_data;
static struct omap_device_pm_latency omap_uhhtll_latency[] = {
{
.deactivate_func = omap_device_idle_hwmods,
.activate_func = omap_device_enable_hwmods,
.flags = OMAP_DEVICE_LATENCY_AUTO_ADJUST,
},
};
/* MUX settings for EHCI pins */
/*
* setup_ehci_io_mux - initialize IO pad mux for USBHOST
@ -530,9 +522,7 @@ void __init usbhs_init(const struct usbhs_omap_board_data *pdata)
}
pdev = omap_device_build(OMAP_USBTLL_DEVICE, bus_id, tll_hwm,
&usbtll_data, sizeof(usbtll_data),
omap_uhhtll_latency,
ARRAY_SIZE(omap_uhhtll_latency), false);
&usbtll_data, sizeof(usbtll_data));
if (IS_ERR(pdev)) {
pr_err("Could not build hwmod device %s\n",
USBHS_TLL_HWMODNAME);
@ -540,9 +530,7 @@ void __init usbhs_init(const struct usbhs_omap_board_data *pdata)
}
pdev = omap_device_build(OMAP_USBHS_DEVICE, bus_id, uhh_hwm,
&usbhs_data, sizeof(usbhs_data),
omap_uhhtll_latency,
ARRAY_SIZE(omap_uhhtll_latency), false);
&usbhs_data, sizeof(usbhs_data));
if (IS_ERR(pdev)) {
pr_err("Could not build hwmod devices %s\n",
USBHS_UHH_HWMODNAME);

2
arch/arm/mach-omap2/usb-musb.c
View file

@ -102,7 +102,7 @@ void __init usb_musb_init(struct omap_musb_board_data *musb_board_data)
return;
pdev = omap_device_build(name, bus_id, oh, &musb_plat,
sizeof(musb_plat), NULL, 0, false);
sizeof(musb_plat));
if (IS_ERR(pdev)) {
pr_err("Could not build omap_device for %s %s\n",
name, oh_name);

3
arch/arm/mach-omap2/wd_timer.c
View file

@ -124,8 +124,7 @@ static int __init omap_init_wdt(void)
pdata.read_reset_sources = prm_read_reset_sources;
pdev = omap_device_build(dev_name, id, oh, &pdata,
sizeof(struct omap_wd_timer_platform_data),
NULL, 0, 0);
sizeof(struct omap_wd_timer_platform_data));
WARN(IS_ERR(pdev), "Can't build omap_device for %s:%s.\n",
dev_name, oh->name);
return 0;