#undef DEBUG
#include <linux/kernel.h>
+#include <linux/export.h>
#include <linux/platform_device.h>
#include <linux/slab.h>
#include <linux/err.h>
#include <linux/clk.h>
#include <linux/clkdev.h>
#include <linux/pm_runtime.h>
+#include <linux/of.h>
+#include <linux/notifier.h>
#include <plat/omap_device.h>
#include <plat/omap_hwmod.h>
#define USE_WAKEUP_LAT 0
#define IGNORE_WAKEUP_LAT 1
+static int omap_device_register(struct platform_device *pdev);
+static int omap_early_device_register(struct platform_device *pdev);
+static 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);
+static void omap_device_delete(struct omap_device *od);
+
+
+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 */
/**
{
struct timespec a, b, c;
- pr_debug("omap_device: %s: activating\n", od->pdev.name);
+ dev_dbg(&od->pdev->dev, "omap_device: activating\n");
while (od->pm_lat_level > 0) {
struct omap_device_pm_latency *odpl;
c = timespec_sub(b, a);
act_lat = timespec_to_ns(&c);
- pr_debug("omap_device: %s: pm_lat %d: activate: elapsed time "
- "%llu nsec\n", od->pdev.name, od->pm_lat_level,
- act_lat);
+ 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;
- pr_warning("omap_device: %s.%d: new worst case "
- "activate latency %d: %llu\n",
- od->pdev.name, od->pdev.id,
- od->pm_lat_level, act_lat);
+ dev_dbg(&od->pdev->dev,
+ "new worst case activate latency "
+ "%d: %llu\n",
+ od->pm_lat_level, act_lat);
} else
- pr_warning("omap_device: %s.%d: activate "
- "latency %d higher than exptected. "
- "(%llu > %d)\n",
- od->pdev.name, od->pdev.id,
- od->pm_lat_level, act_lat,
- odpl->activate_lat);
+ dev_warn(&od->pdev->dev,
+ "activate latency %d "
+ "higher than exptected. (%llu > %d)\n",
+ od->pm_lat_level, act_lat,
+ odpl->activate_lat);
}
od->dev_wakeup_lat -= odpl->activate_lat;
{
struct timespec a, b, c;
- pr_debug("omap_device: %s: deactivating\n", od->pdev.name);
+ dev_dbg(&od->pdev->dev, "omap_device: deactivating\n");
while (od->pm_lat_level < od->pm_lats_cnt) {
struct omap_device_pm_latency *odpl;
c = timespec_sub(b, a);
deact_lat = timespec_to_ns(&c);
- pr_debug("omap_device: %s: pm_lat %d: deactivate: elapsed time "
- "%llu nsec\n", od->pdev.name, od->pm_lat_level,
- deact_lat);
+ 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;
- pr_warning("omap_device: %s.%d: new worst case "
- "deactivate latency %d: %llu\n",
- od->pdev.name, od->pdev.id,
- od->pm_lat_level, deact_lat);
+ dev_dbg(&od->pdev->dev,
+ "new worst case deactivate latency "
+ "%d: %llu\n",
+ od->pm_lat_level, deact_lat);
} else
- pr_warning("omap_device: %s.%d: deactivate "
- "latency %d higher than exptected. "
- "(%llu > %d)\n",
- od->pdev.name, od->pdev.id,
- od->pm_lat_level, deact_lat,
- odpl->deactivate_lat);
+ dev_warn(&od->pdev->dev,
+ "deactivate latency %d "
+ "higher than exptected. (%llu > %d)\n",
+ od->pm_lat_level, deact_lat,
+ odpl->deactivate_lat);
}
-
od->dev_wakeup_lat += odpl->activate_lat;
od->pm_lat_level++;
if (!clk_alias || !clk_name)
return;
- pr_debug("omap_device: %s: Creating %s -> %s\n",
- dev_name(&od->pdev.dev), clk_alias, clk_name);
+ dev_dbg(&od->pdev->dev, "Creating %s -> %s\n", clk_alias, clk_name);
- r = clk_get_sys(dev_name(&od->pdev.dev), clk_alias);
+ r = clk_get_sys(dev_name(&od->pdev->dev), clk_alias);
if (!IS_ERR(r)) {
- pr_warning("omap_device: %s: alias %s already exists\n",
- dev_name(&od->pdev.dev), clk_alias);
+ dev_warn(&od->pdev->dev,
+ "alias %s already exists\n", clk_alias);
clk_put(r);
return;
}
r = omap_clk_get_by_name(clk_name);
if (IS_ERR(r)) {
- pr_err("omap_device: %s: omap_clk_get_by_name for %s failed\n",
- dev_name(&od->pdev.dev), clk_name);
+ dev_err(&od->pdev->dev,
+ "omap_clk_get_by_name for %s failed\n", clk_name);
return;
}
- l = clkdev_alloc(r, clk_alias, dev_name(&od->pdev.dev));
+ l = clkdev_alloc(r, clk_alias, dev_name(&od->pdev->dev));
if (!l) {
- pr_err("omap_device: %s: clkdev_alloc for %s failed\n",
- dev_name(&od->pdev.dev), clk_alias);
+ dev_err(&od->pdev->dev,
+ "clkdev_alloc for %s failed\n", clk_alias);
return;
}
}
+static struct dev_pm_domain omap_device_pm_domain;
+
+/**
+ * omap_device_build_from_dt - build an omap_device with multiple hwmods
+ * @pdev_name: name of the platform_device driver to use
+ * @pdev_id: this platform_device's connection ID
+ * @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
+ *
+ * Returns 0 or PTR_ERR() on error.
+ */
+static int omap_device_build_from_dt(struct platform_device *pdev)
+{
+ struct omap_hwmod **hwmods;
+ struct omap_device *od;
+ struct omap_hwmod *oh;
+ struct device_node *node = pdev->dev.of_node;
+ const char *oh_name;
+ int oh_cnt, i, ret = 0;
+
+ oh_cnt = of_property_count_strings(node, "ti,hwmods");
+ if (!oh_cnt || IS_ERR_VALUE(oh_cnt)) {
+ dev_warn(&pdev->dev, "No 'hwmods' to build omap_device\n");
+ return -ENODEV;
+ }
+
+ hwmods = kzalloc(sizeof(struct omap_hwmod *) * oh_cnt, GFP_KERNEL);
+ if (!hwmods) {
+ ret = -ENOMEM;
+ goto odbfd_exit;
+ }
+
+ for (i = 0; i < oh_cnt; i++) {
+ of_property_read_string_index(node, "ti,hwmods", i, &oh_name);
+ oh = omap_hwmod_lookup(oh_name);
+ if (!oh) {
+ dev_err(&pdev->dev, "Cannot lookup hwmod '%s'\n",
+ oh_name);
+ ret = -EINVAL;
+ goto odbfd_exit1;
+ }
+ hwmods[i] = oh;
+ }
+
+ od = omap_device_alloc(pdev, hwmods, oh_cnt, NULL, 0);
+ if (!od) {
+ dev_err(&pdev->dev, "Cannot allocate omap_device for :%s\n",
+ oh_name);
+ ret = PTR_ERR(od);
+ goto odbfd_exit1;
+ }
+
+ if (of_get_property(node, "ti,no_idle_on_suspend", NULL))
+ omap_device_disable_idle_on_suspend(pdev);
+
+ pdev->dev.pm_domain = &omap_device_pm_domain;
+
+odbfd_exit1:
+ kfree(hwmods);
+odbfd_exit:
+ return ret;
+}
+
+static int _omap_device_notifier_call(struct notifier_block *nb,
+ unsigned long event, void *dev)
+{
+ struct platform_device *pdev = to_platform_device(dev);
+
+ switch (event) {
+ case BUS_NOTIFY_ADD_DEVICE:
+ if (pdev->dev.of_node)
+ omap_device_build_from_dt(pdev);
+ break;
+
+ case BUS_NOTIFY_DEL_DEVICE:
+ if (pdev->archdata.od)
+ omap_device_delete(pdev->archdata.od);
+ break;
+ }
+
+ return NOTIFY_DONE;
+}
+
+
/* Public functions for use by core code */
/**
* return the context loss counter for that hwmod, otherwise return
* zero.
*/
-u32 omap_device_get_context_loss_count(struct platform_device *pdev)
+int omap_device_get_context_loss_count(struct platform_device *pdev)
{
struct omap_device *od;
u32 ret = 0;
* much memory to allocate before calling
* omap_device_fill_resources(). Returns the count.
*/
-int omap_device_count_resources(struct omap_device *od)
+static int omap_device_count_resources(struct omap_device *od)
{
int c = 0;
int i;
c += omap_hwmod_count_resources(od->hwmods[i]);
pr_debug("omap_device: %s: counted %d total resources across %d "
- "hwmods\n", od->pdev.name, c, od->hwmods_cnt);
+ "hwmods\n", od->pdev->name, c, od->hwmods_cnt);
return c;
}
* functions to get device resources. Hacking around the existing
* platform_device code wastes memory. Returns 0.
*/
-int omap_device_fill_resources(struct omap_device *od, struct resource *res)
+static int omap_device_fill_resources(struct omap_device *od,
+ struct resource *res)
{
int c = 0;
int i, r;
return 0;
}
+/**
+ * omap_device_alloc - allocate an omap_device
+ * @pdev: platform_device that will be included in this omap_device
+ * @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.
+ *
+ * Returns an struct omap_device pointer or ERR_PTR() on error;
+ */
+static 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)
+{
+ int ret = -ENOMEM;
+ struct omap_device *od;
+ struct resource *res = NULL;
+ int i, res_count;
+ struct omap_hwmod **hwmods;
+
+ od = kzalloc(sizeof(struct omap_device), GFP_KERNEL);
+ if (!od) {
+ ret = -ENOMEM;
+ goto oda_exit1;
+ }
+ od->hwmods_cnt = oh_cnt;
+
+ hwmods = kmemdup(ohs, sizeof(struct omap_hwmod *) * oh_cnt, GFP_KERNEL);
+ if (!hwmods)
+ goto oda_exit2;
+
+ od->hwmods = hwmods;
+ od->pdev = pdev;
+
+ /*
+ * HACK: Ideally the resources from DT should match, and hwmod
+ * should just add the missing ones. Since the name is not
+ * properly populated by DT, stick to hwmod resources only.
+ */
+ if (pdev->num_resources && pdev->resource)
+ dev_warn(&pdev->dev, "%s(): resources already allocated %d\n",
+ __func__, pdev->num_resources);
+
+ res_count = omap_device_count_resources(od);
+ if (res_count > 0) {
+ dev_dbg(&pdev->dev, "%s(): resources allocated from hwmod %d\n",
+ __func__, res_count);
+ res = kzalloc(sizeof(struct resource) * res_count, GFP_KERNEL);
+ if (!res)
+ goto oda_exit3;
+
+ omap_device_fill_resources(od, res);
+
+ ret = platform_device_add_resources(pdev, res, res_count);
+ kfree(res);
+
+ if (ret)
+ goto oda_exit3;
+ }
+
+ 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++) {
+ hwmods[i]->od = od;
+ _add_hwmod_clocks_clkdev(od, hwmods[i]);
+ }
+
+ return od;
+
+oda_exit3:
+ kfree(hwmods);
+oda_exit2:
+ kfree(od);
+oda_exit1:
+ dev_err(&pdev->dev, "omap_device: build failed (%d)\n", ret);
+
+ return ERR_PTR(ret);
+}
+
+static void omap_device_delete(struct omap_device *od)
+{
+ if (!od)
+ return;
+
+ od->pdev->archdata.od = NULL;
+ kfree(od->pm_lats);
+ kfree(od->hwmods);
+ kfree(od);
+}
+
/**
* omap_device_build - build and register an omap_device with one omap_hwmod
* @pdev_name: name of the platform_device driver to use
* information. Returns ERR_PTR(-EINVAL) if @oh is NULL; otherwise,
* passes along the return value of omap_device_build_ss().
*/
-struct omap_device *omap_device_build(const char *pdev_name, int pdev_id,
+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,
* platform_device record. Returns an ERR_PTR() on error, or passes
* along the return value of omap_device_register().
*/
-struct omap_device *omap_device_build_ss(const char *pdev_name, int pdev_id,
+struct platform_device *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)
{
int ret = -ENOMEM;
+ struct platform_device *pdev;
struct omap_device *od;
- char *pdev_name2;
- struct resource *res = NULL;
- int i, res_count;
- struct omap_hwmod **hwmods;
if (!ohs || oh_cnt == 0 || !pdev_name)
return ERR_PTR(-EINVAL);
if (!pdata && pdata_len > 0)
return ERR_PTR(-EINVAL);
- pr_debug("omap_device: %s: building with %d hwmods\n", pdev_name,
- oh_cnt);
-
- od = kzalloc(sizeof(struct omap_device), GFP_KERNEL);
- if (!od)
- return ERR_PTR(-ENOMEM);
+ pdev = platform_device_alloc(pdev_name, pdev_id);
+ if (!pdev) {
+ ret = -ENOMEM;
+ goto odbs_exit;
+ }
- od->hwmods_cnt = oh_cnt;
+ /* Set the dev_name early to allow dev_xxx in omap_device_alloc */
+ if (pdev->id != -1)
+ dev_set_name(&pdev->dev, "%s.%d", pdev->name, pdev->id);
+ else
+ dev_set_name(&pdev->dev, "%s", pdev->name);
- hwmods = kzalloc(sizeof(struct omap_hwmod *) * oh_cnt,
- GFP_KERNEL);
- if (!hwmods)
+ od = omap_device_alloc(pdev, ohs, oh_cnt, pm_lats, pm_lats_cnt);
+ if (!od)
goto odbs_exit1;
- memcpy(hwmods, ohs, sizeof(struct omap_hwmod *) * oh_cnt);
- od->hwmods = hwmods;
-
- pdev_name2 = kzalloc(strlen(pdev_name) + 1, GFP_KERNEL);
- if (!pdev_name2)
- goto odbs_exit2;
- strcpy(pdev_name2, pdev_name);
-
- od->pdev.name = pdev_name2;
- od->pdev.id = pdev_id;
-
- res_count = omap_device_count_resources(od);
- if (res_count > 0) {
- res = kzalloc(sizeof(struct resource) * res_count, GFP_KERNEL);
- if (!res)
- goto odbs_exit3;
- }
- omap_device_fill_resources(od, res);
-
- od->pdev.num_resources = res_count;
- od->pdev.resource = res;
-
- ret = platform_device_add_data(&od->pdev, pdata, pdata_len);
+ ret = platform_device_add_data(pdev, pdata, pdata_len);
if (ret)
- goto odbs_exit4;
-
- od->pm_lats = pm_lats;
- od->pm_lats_cnt = pm_lats_cnt;
+ goto odbs_exit2;
if (is_early_device)
- ret = omap_early_device_register(od);
+ ret = omap_early_device_register(pdev);
else
- ret = omap_device_register(od);
-
- for (i = 0; i < oh_cnt; i++) {
- hwmods[i]->od = od;
- _add_hwmod_clocks_clkdev(od, hwmods[i]);
- }
-
+ ret = omap_device_register(pdev);
if (ret)
- goto odbs_exit4;
+ goto odbs_exit2;
- return od;
+ return pdev;
-odbs_exit4:
- kfree(res);
-odbs_exit3:
- kfree(pdev_name2);
odbs_exit2:
- kfree(hwmods);
+ omap_device_delete(od);
odbs_exit1:
- kfree(od);
+ platform_device_put(pdev);
+odbs_exit:
pr_err("omap_device: %s: build failed (%d)\n", pdev_name, ret);
* platform_early_add_device() on the underlying platform_device.
* Returns 0 by default.
*/
-int omap_early_device_register(struct omap_device *od)
+static int omap_early_device_register(struct platform_device *pdev)
{
struct platform_device *devices[1];
- devices[0] = &(od->pdev);
+ devices[0] = pdev;
early_platform_add_devices(devices, 1);
return 0;
}
* platform_device_register() on the underlying platform_device.
* Returns the return value of platform_device_register().
*/
-int omap_device_register(struct omap_device *od)
+static int omap_device_register(struct platform_device *pdev)
{
- pr_debug("omap_device: %s: registering\n", od->pdev.name);
+ pr_debug("omap_device: %s: registering\n", pdev->name);
- od->pdev.dev.parent = &omap_device_parent;
- od->pdev.dev.pm_domain = &omap_device_pm_domain;
- return platform_device_register(&od->pdev);
+ pdev->dev.parent = &omap_device_parent;
+ pdev->dev.pm_domain = &omap_device_pm_domain;
+ return platform_device_add(pdev);
}
od = to_omap_device(pdev);
if (od->_state == OMAP_DEVICE_STATE_ENABLED) {
- WARN(1, "omap_device: %s.%d: %s() called from invalid state %d\n",
- od->pdev.name, od->pdev.id, __func__, od->_state);
+ dev_warn(&pdev->dev,
+ "omap_device: %s() called from invalid state %d\n",
+ __func__, od->_state);
return -EINVAL;
}
od = to_omap_device(pdev);
if (od->_state != OMAP_DEVICE_STATE_ENABLED) {
- WARN(1, "omap_device: %s.%d: %s() called from invalid state %d\n",
- od->pdev.name, od->pdev.id, __func__, od->_state);
+ dev_warn(&pdev->dev,
+ "omap_device: %s() called from invalid state %d\n",
+ __func__, od->_state);
return -EINVAL;
}
if (od->_state != OMAP_DEVICE_STATE_ENABLED &&
od->_state != OMAP_DEVICE_STATE_IDLE) {
- WARN(1, "omap_device: %s.%d: %s() called from invalid state %d\n",
- od->pdev.name, od->pdev.id, __func__, od->_state);
+ dev_warn(&pdev->dev,
+ "omap_device: %s() called from invalid state %d\n",
+ __func__, od->_state);
return -EINVAL;
}
return omap_hwmod_get_mpu_rt_va(od->hwmods[0]);
}
+/**
+ * omap_device_get_by_hwmod_name() - convert a hwmod name to
+ * device pointer.
+ * @oh_name: name of the hwmod device
+ *
+ * Returns back a struct device * pointer associated with a hwmod
+ * device represented by a hwmod_name
+ */
+struct device *omap_device_get_by_hwmod_name(const char *oh_name)
+{
+ struct omap_hwmod *oh;
+
+ if (!oh_name) {
+ WARN(1, "%s: no hwmod name!\n", __func__);
+ return ERR_PTR(-EINVAL);
+ }
+
+ oh = omap_hwmod_lookup(oh_name);
+ if (IS_ERR_OR_NULL(oh)) {
+ WARN(1, "%s: no hwmod for %s\n", __func__,
+ oh_name);
+ return ERR_PTR(oh ? PTR_ERR(oh) : -ENODEV);
+ }
+ if (IS_ERR_OR_NULL(oh->od)) {
+ WARN(1, "%s: no omap_device for %s\n", __func__,
+ oh_name);
+ return ERR_PTR(oh->od ? PTR_ERR(oh->od) : -ENODEV);
+ }
+
+ if (IS_ERR_OR_NULL(oh->od->pdev))
+ return ERR_PTR(oh->od->pdev ? PTR_ERR(oh->od->pdev) : -ENODEV);
+
+ 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
.parent = &platform_bus,
};
+static struct notifier_block platform_nb = {
+ .notifier_call = _omap_device_notifier_call,
+};
+
static int __init omap_device_init(void)
{
+ bus_register_notifier(&platform_bus_type, &platform_nb);
return device_register(&omap_device_parent);
}
core_initcall(omap_device_init);
git.openpandora.org / pandora-kernel.git / blobdiff