static int process_dump(void)
{
int rc;
uint32_t dump_id, dump_size, dump_type;
struct dump_obj *dump;
char name[22];
rc = dump_read_info(&dump_id, &dump_size, &dump_type);
if (rc != OPAL_SUCCESS)
return rc;
sprintf(name, "0x%x-0x%x", dump_type, dump_id);
/* we may get notified twice, let's handle
* that gracefully and not create two conflicting
* entries.
*/
if (kset_find_obj(dump_kset, name))
return 0;
dump = create_dump_obj(dump_id, dump_size, dump_type);
if (!dump)
return -1;
return 0;
}
/*
* Add sysfs entries for the sleep modes.
*/
static int __init msm_pm_mode_sysfs_add(void)
{
struct kobject *module_kobj = NULL;
struct kobject *modes_kobj = NULL;
unsigned int cpu;
int ret;
module_kobj = kset_find_obj(module_kset, KBUILD_MODNAME);
if (!module_kobj) {
printk(KERN_ERR "%s: cannot find kobject for module %s\n",
__func__, KBUILD_MODNAME);
ret = -ENOENT;
goto mode_sysfs_add_exit;
}
modes_kobj = kobject_create_and_add("modes", module_kobj);
if (!modes_kobj) {
printk(KERN_ERR "%s: cannot create modes kobject\n", __func__);
ret = -ENOMEM;
goto mode_sysfs_add_exit;
}
for_each_possible_cpu(cpu) {
ret = msm_pm_mode_sysfs_add_cpu(cpu, modes_kobj);
if (ret)
goto mode_sysfs_add_exit;
}
ret = 0;
mode_sysfs_add_exit:
return ret;
}
/**
* driver_find - locate driver on a bus by its name.
* @name: name of the driver.
* @bus: bus to scan for the driver.
*
* Call kset_find_obj() to iterate over list of drivers on
* a bus to find driver by name. Return driver if found.
*
* Note that kset_find_obj increments driver's reference count.
*/
struct device_driver *driver_find(const char *name, struct bus_type *bus)
{
struct kobject *k = kset_find_obj(&bus->drivers, name);
if (k)
return to_drv(k);
return NULL;
}
static __init int msm_thermal_add_cc_nodes(void)
{
struct kobject *module_kobj = NULL;
struct kobject *cc_kobj = NULL;
int ret = 0;
module_kobj = kset_find_obj(module_kset, KBUILD_MODNAME);
if (!module_kobj) {
pr_err("%s: cannot find kobject for module\n",
KBUILD_MODNAME);
ret = -ENOENT;
goto done_cc_nodes;
}
cc_kobj = kobject_create_and_add("core_control", module_kobj);
if (!cc_kobj) {
pr_err("%s: cannot create core control kobj\n",
KBUILD_MODNAME);
ret = -ENOMEM;
goto done_cc_nodes;
}
ret = sysfs_create_group(cc_kobj, &cc_attr_group);
if (ret) {
pr_err("%s: cannot create group\n", KBUILD_MODNAME);
goto done_cc_nodes;
}
return 0;
done_cc_nodes:
if (cc_kobj)
kobject_del(cc_kobj);
return ret;
}
static __init int msm_thermal_add_timer_nodes(void)
{
struct kobject *module_kobj = NULL;
int ret = 0;
module_kobj = kset_find_obj(module_kset, KBUILD_MODNAME);
if (!module_kobj) {
pr_err("%s: cannot find kobject for module\n",
KBUILD_MODNAME);
ret = -ENOENT;
goto failed;
}
tt_kobj = kobject_create_and_add("thermal_timer", module_kobj);
if (!tt_kobj) {
pr_err("%s: cannot create timer kobj\n",
KBUILD_MODNAME);
ret = -ENOMEM;
goto failed;
}
ret = sysfs_create_group(tt_kobj, &tt_attr_group);
if (ret) {
pr_err("%s: cannot create group\n", KBUILD_MODNAME);
goto failed;
}
return 0;
failed:
if (tt_kobj)
kobject_del(tt_kobj);
return ret;
}
/* vio_find_name() - internal because only vio.c knows how we formatted the
* kobject name
* XXX once vio_bus_type.devices is actually used as a kset in
* drivers/base/bus.c, this function should be removed in favor of
* "device_find(kobj_name, &vio_bus_type)"
*/
static struct vio_dev *vio_find_name(const char *kobj_name)
{
struct kobject *found;
found = kset_find_obj(&devices_subsys, kobj_name);
if (!found)
return NULL;
return to_vio_dev(container_of(found, struct device, kobj));
}
/**
* driver_find - locate driver on a bus by its name.
* @name: name of the driver.
* @bus: bus to scan for the driver.
*
* Call kset_find_obj() to iterate over list of drivers on
* a bus to find driver by name. Return driver if found.
*
* Note that kset_find_obj increments driver's reference count.
*/
struct device_driver *driver_find(const char *name, struct bus_type *bus)
{
struct kobject *k = kset_find_obj(bus->p->drivers_kset, name);
struct driver_private *priv;
if (k) {
priv = to_driver(k);
return priv->driver;
}
return NULL;
}
/**
* driver_find - locate driver on a bus by its name.
* @name: name of the driver.
* @bus: bus to scan for the driver.
*
* Call kset_find_obj() to iterate over list of drivers on
* a bus to find driver by name. Return driver if found.
*
* This routine provides no locking to prevent the driver it returns
* from being unregistered or unloaded while the caller is using it.
* The caller is responsible for preventing this.
*/
struct device_driver *driver_find(const char *name, struct bus_type *bus)
{
struct kobject *k = kset_find_obj(bus->p->drivers_kset, name);
struct driver_private *priv;
if (k) {
/* Drop reference added by kset_find_obj() */
kobject_put(k);
priv = to_driver(k);
return priv->driver;
}
return NULL;
}
struct ipcp_factory * ipcpf_find(struct ipcp_factories * factories,
const char * name)
{
struct kobject * k;
if (!factories || !factories->set || !string_is_ok(name))
return NULL;
k = kset_find_obj(factories->set, name);
if (k) {
kobject_put(k);
return to_ipcp(k);
}
return NULL;
}
/**
* pci_hp_create_link - create symbolic link to the hotplug driver module.
* @pci_slot: struct pci_slot
*
* Helper function for pci_hotplug_core.c to create symbolic link to
* the hotplug driver module.
*/
void pci_hp_create_module_link(struct pci_slot *pci_slot)
{
struct hotplug_slot *slot = pci_slot->hotplug;
struct kobject *kobj = NULL;
int ret;
if (!slot || !slot->ops)
return;
kobj = kset_find_obj(module_kset, slot->ops->mod_name);
if (!kobj)
return;
ret = sysfs_create_link(&pci_slot->kobj, kobj, "module");
if (ret)
dev_err(&pci_slot->bus->dev, "Error creating sysfs link (%d)\n",
ret);
kobject_put(kobj);
}
static irqreturn_t elog_event(int irq, void *data)
{
__be64 size;
__be64 id;
__be64 type;
uint64_t elog_size;
uint64_t log_id;
uint64_t elog_type;
int rc;
char name[2+16+1];
struct kobject *kobj;
rc = opal_get_elog_size(&id, &size, &type);
if (rc != OPAL_SUCCESS) {
pr_err("ELOG: OPAL log info read failed\n");
return IRQ_HANDLED;
}
elog_size = be64_to_cpu(size);
log_id = be64_to_cpu(id);
elog_type = be64_to_cpu(type);
WARN_ON(elog_size > OPAL_MAX_ERRLOG_SIZE);
if (elog_size >= OPAL_MAX_ERRLOG_SIZE)
elog_size = OPAL_MAX_ERRLOG_SIZE;
sprintf(name, "0x%llx", log_id);
/* we may get notified twice, let's handle
* that gracefully and not create two conflicting
* entries.
*/
kobj = kset_find_obj(elog_kset, name);
if (kobj) {
/* Drop reference added by kset_find_obj() */
kobject_put(kobj);
return IRQ_HANDLED;
}
create_elog_obj(log_id, elog_size, elog_type);
return IRQ_HANDLED;
}
static int __init qdss_sysfs_init(void)
{
int ret;
qdss.modulekobj = kset_find_obj(module_kset, KBUILD_MODNAME);
if (!qdss.modulekobj) {
pr_err("failed to find QDSS sysfs module kobject\n");
ret = -ENOENT;
goto err;
}
ret = sysfs_create_file(qdss.modulekobj, &max_clk_attr.attr);
if (ret) {
pr_err("failed to create QDSS sysfs max_clk attribute\n");
goto err;
}
return 0;
err:
return ret;
}
static int __init coresight_sysfs_init(void)
{
int ret;
coresight.modulekobj = kset_find_obj(module_kset, KBUILD_MODNAME);
if (!coresight.modulekobj) {
pr_err("failed to find CORESIGHT sysfs module kobject\n");
ret = -ENOENT;
goto err;
}
ret = sysfs_create_file(coresight.modulekobj, &max_clk_attr.attr);
if (ret) {
pr_err("failed to create CORESIGHT sysfs max_clk attribute\n");
goto err;
}
return 0;
err:
return ret;
}
struct iommu_group *iommu_group_get_by_id(int id)
{
struct kobject *group_kobj;
struct iommu_group *group;
const char *name;
if (!iommu_group_kset)
return NULL;
name = kasprintf(GFP_KERNEL, "%d", id);
if (!name)
return NULL;
group_kobj = kset_find_obj(iommu_group_kset, name);
kfree(name);
if (!group_kobj)
return NULL;
group = container_of(group_kobj, struct iommu_group, kobj);
BUG_ON(group->id !=
void module_add_driver(struct module *mod, struct device_driver *drv)
{
char *driver_name;
int no_warn;
struct module_kobject *mk = NULL;
if (!drv)
return;
if (mod)
mk = &mod->mkobj;
else if (drv->mod_name) {
struct kobject *mkobj;
/* Lookup built-in module entry in /sys/modules */
mkobj = kset_find_obj(module_kset, drv->mod_name);
if (mkobj) {
mk = container_of(mkobj, struct module_kobject, kobj);
/* remember our module structure */
drv->p->mkobj = mk;
/* kset_find_obj took a reference */
kobject_put(mkobj);
}
}
if (!mk)
return;
/* Don't check return codes; these calls are idempotent */
no_warn = sysfs_create_link(&drv->p->kobj, &mk->kobj, "module");
driver_name = make_driver_name(drv);
if (driver_name) {
module_create_drivers_dir(mk);
no_warn = sysfs_create_link(mk->drivers_dir, &drv->p->kobj,
driver_name);
kfree(driver_name);
}
}
void module_add_driver(struct module *mod, struct device_driver *drv)
{
char *driver_name;
int no_warn;
struct module_kobject *mk = NULL;
if (!drv)
return;
if (mod)
mk = &mod->mkobj;
else if (drv->mod_name) {
struct kobject *mkobj;
mkobj = kset_find_obj(module_kset, drv->mod_name);
if (mkobj) {
mk = container_of(mkobj, struct module_kobject, kobj);
drv->p->mkobj = mk;
kobject_put(mkobj);
}
}
if (!mk)
return;
no_warn = sysfs_create_link(&drv->p->kobj, &mk->kobj, "module");
driver_name = make_driver_name(drv);
if (driver_name) {
module_create_drivers_dir(mk);
no_warn = sysfs_create_link(mk->drivers_dir, &drv->p->kobj,
driver_name);
kfree(driver_name);
}
}
static char *make_slot_name(const char *name)
{
char *new_name;
int len, max, dup;
new_name = kstrdup(name, GFP_KERNEL);
if (!new_name)
return NULL;
/*
* Make sure we hit the realloc case the first time through the
* loop. 'len' will be strlen(name) + 3 at that point which is
* enough space for "name-X" and the trailing NUL.
*/
len = strlen(name) + 2;
max = 1;
dup = 1;
for (;;) {
struct kobject *dup_slot;
dup_slot = kset_find_obj(pci_slots_kset, new_name);
if (!dup_slot)
break;
kobject_put(dup_slot);
if (dup == max) {
len++;
max *= 10;
kfree(new_name);
new_name = kmalloc(len, GFP_KERNEL);
if (!new_name)
break;
}
sprintf(new_name, "%s-%d", name, dup++);
}
return new_name;
}
static void elog_work_fn(struct work_struct *work)
{
__be64 size;
__be64 id;
__be64 type;
uint64_t elog_size;
uint64_t log_id;
uint64_t elog_type;
int rc;
char name[2+16+1];
rc = opal_get_elog_size(&id, &size, &type);
if (rc != OPAL_SUCCESS) {
pr_err("ELOG: OPAL log info read failed\n");
return;
}
elog_size = be64_to_cpu(size);
log_id = be64_to_cpu(id);
elog_type = be64_to_cpu(type);
WARN_ON(elog_size > OPAL_MAX_ERRLOG_SIZE);
if (elog_size >= OPAL_MAX_ERRLOG_SIZE)
elog_size = OPAL_MAX_ERRLOG_SIZE;
sprintf(name, "0x%llx", log_id);
/* we may get notified twice, let's handle
* that gracefully and not create two conflicting
* entries.
*/
if (kset_find_obj(elog_kset, name))
return;
create_elog_obj(log_id, elog_size, elog_type);
}
static int msm_thermal_add_vdd_rstr_nodes(void)
{
struct kobject *module_kobj = NULL;
struct kobject *vdd_rstr_kobj = NULL;
struct kobject *vdd_rstr_reg_kobj[MAX_RAILS] = {0};
int rc = 0;
int i = 0;
if (!vdd_rstr_probed) {
vdd_rstr_nodes_called = true;
return rc;
}
if (vdd_rstr_probed && rails_cnt == 0)
return rc;
module_kobj = kset_find_obj(module_kset, KBUILD_MODNAME);
if (!module_kobj) {
pr_err("%s: cannot find kobject for module %s\n",
__func__, KBUILD_MODNAME);
rc = -ENOENT;
goto thermal_sysfs_add_exit;
}
vdd_rstr_kobj = kobject_create_and_add("vdd_restriction", module_kobj);
if (!vdd_rstr_kobj) {
pr_err("%s: cannot create vdd_restriction kobject\n", __func__);
rc = -ENOMEM;
goto thermal_sysfs_add_exit;
}
rc = sysfs_create_group(vdd_rstr_kobj, &vdd_rstr_en_attribs_gp);
if (rc) {
pr_err("%s: cannot create kobject attribute group\n", __func__);
rc = -ENOMEM;
goto thermal_sysfs_add_exit;
}
for (i = 0; i < rails_cnt; i++) {
vdd_rstr_reg_kobj[i] = kobject_create_and_add(rails[i].name,
vdd_rstr_kobj);
if (!vdd_rstr_reg_kobj[i]) {
pr_err("%s: cannot create for kobject for %s\n",
__func__, rails[i].name);
rc = -ENOMEM;
goto thermal_sysfs_add_exit;
}
rails[i].attr_gp.attrs = kzalloc(sizeof(struct attribute *) * 3,
GFP_KERNEL);
if (!rails[i].attr_gp.attrs) {
rc = -ENOMEM;
goto thermal_sysfs_add_exit;
}
VDD_RES_RW_ATTRIB(rails[i], rails[i].level_attr, 0, level);
VDD_RES_RO_ATTRIB(rails[i], rails[i].value_attr, 1, value);
rails[i].attr_gp.attrs[2] = NULL;
rc = sysfs_create_group(vdd_rstr_reg_kobj[i],
&rails[i].attr_gp);
if (rc) {
pr_err("%s: cannot create attribute group for %s\n",
__func__, rails[i].name);
goto thermal_sysfs_add_exit;
}
}
return rc;
thermal_sysfs_add_exit:
if (rc) {
for (i = 0; i < rails_cnt; i++) {
kobject_del(vdd_rstr_reg_kobj[i]);
kfree(rails[i].attr_gp.attrs);
}
if (vdd_rstr_kobj)
kobject_del(vdd_rstr_kobj);
}
return rc;
}
/*
* Add sysfs entries for the sleep modes.
*/
static int __init msm_pm_mode_sysfs_add(void)
{
struct kobject *module_kobj = NULL;
struct kobject *modes_kobj = NULL;
struct kobject *kobj;
struct attribute_group *attr_group;
struct attribute **attrs;
struct kobj_attribute *kobj_attrs;
int i, k;
int ret;
KDEBUG_FUNC();
module_kobj = kset_find_obj(module_kset, KBUILD_MODNAME);
if (!module_kobj) {
printk(KERN_ERR "%s: cannot find kobject for module %s\n",
__func__, KBUILD_MODNAME);
ret = -ENOENT;
goto mode_sysfs_add_cleanup;
}
modes_kobj = kobject_create_and_add("modes", module_kobj);
if (!modes_kobj) {
printk(KERN_ERR "%s: cannot create modes kobject\n", __func__);
ret = -ENOMEM;
goto mode_sysfs_add_cleanup;
}
for (i = 0; i < ARRAY_SIZE(msm_pm_mode_kobjs); i++) {
if (!msm_pm_modes[i].supported)
continue;
kobj = kobject_create_and_add(
msm_pm_sleep_mode_labels[i], modes_kobj);
attr_group = kzalloc(sizeof(*attr_group), GFP_KERNEL);
attrs = kzalloc(sizeof(*attrs) * (MSM_PM_MODE_ATTR_NR + 1),
GFP_KERNEL);
kobj_attrs = kzalloc(sizeof(*kobj_attrs) * MSM_PM_MODE_ATTR_NR,
GFP_KERNEL);
if (!kobj || !attr_group || !attrs || !kobj_attrs) {
printk(KERN_ERR
"%s: cannot create kobject or attributes\n",
__func__);
ret = -ENOMEM;
goto mode_sysfs_add_abort;
}
kobj_attrs[0].attr.name = MSM_PM_MODE_ATTR_SUSPEND_ENABLED;
kobj_attrs[1].attr.name = MSM_PM_MODE_ATTR_IDLE_ENABLED;
kobj_attrs[2].attr.name = MSM_PM_MODE_ATTR_LATENCY;
kobj_attrs[3].attr.name = MSM_PM_MODE_ATTR_RESIDENCY;
for (k = 0; k < MSM_PM_MODE_ATTR_NR; k++) {
kobj_attrs[k].attr.mode = 0644;
kobj_attrs[k].show = msm_pm_mode_attr_show;
kobj_attrs[k].store = msm_pm_mode_attr_store;
attrs[k] = &kobj_attrs[k].attr;
}
attrs[MSM_PM_MODE_ATTR_NR] = NULL;
attr_group->attrs = attrs;
ret = sysfs_create_group(kobj, attr_group);
if (ret) {
printk(KERN_ERR
"%s: cannot create kobject attribute group\n",
__func__);
goto mode_sysfs_add_abort;
}
msm_pm_mode_kobjs[i] = kobj;
msm_pm_mode_attr_group[i] = attr_group;
msm_pm_mode_attrs[i] = attrs;
msm_pm_mode_kobj_attrs[i] = kobj_attrs;
}
return 0;
mode_sysfs_add_abort:
kfree(kobj_attrs);
kfree(attrs);
kfree(attr_group);
kobject_put(kobj);
mode_sysfs_add_cleanup:
for (i = ARRAY_SIZE(msm_pm_mode_kobjs) - 1; i >= 0; i--) {
if (!msm_pm_mode_kobjs[i])
continue;
sysfs_remove_group(
msm_pm_mode_kobjs[i], msm_pm_mode_attr_group[i]);
kfree(msm_pm_mode_kobj_attrs[i]);
kfree(msm_pm_mode_attrs[i]);
kfree(msm_pm_mode_attr_group[i]);
kobject_put(msm_pm_mode_kobjs[i]);
}
return ret;
}
struct bus_type *find_bus(char *name)
{
struct kobject *k = kset_find_obj(bus_kset, name);
return k ? to_bus(k) : NULL;
}
static int msm_thermal_add_psm_nodes(void)
{
struct kobject *module_kobj = NULL;
struct kobject *psm_kobj = NULL;
struct kobject *psm_reg_kobj[MAX_RAILS] = {0};
int rc = 0;
int i = 0;
if (!psm_probed) {
psm_nodes_called = true;
return rc;
}
if (psm_probed && psm_rails_cnt == 0)
return rc;
module_kobj = kset_find_obj(module_kset, KBUILD_MODNAME);
if (!module_kobj) {
pr_err("%s: cannot find kobject for module %s\n",
__func__, KBUILD_MODNAME);
rc = -ENOENT;
goto psm_node_exit;
}
psm_kobj = kobject_create_and_add("pmic_sw_mode", module_kobj);
if (!psm_kobj) {
pr_err("%s: cannot create psm kobject\n", KBUILD_MODNAME);
rc = -ENOMEM;
goto psm_node_exit;
}
for (i = 0; i < psm_rails_cnt; i++) {
psm_reg_kobj[i] = kobject_create_and_add(psm_rails[i].name,
psm_kobj);
if (!psm_reg_kobj[i]) {
pr_err("%s: cannot create for kobject for %s\n",
KBUILD_MODNAME, psm_rails[i].name);
rc = -ENOMEM;
goto psm_node_exit;
}
psm_rails[i].attr_gp.attrs = kzalloc( \
sizeof(struct attribute *) * 2, GFP_KERNEL);
if (!psm_rails[i].attr_gp.attrs) {
rc = -ENOMEM;
goto psm_node_exit;
}
PSM_RW_ATTRIB(psm_rails[i], psm_rails[i].mode_attr, 0, mode);
psm_rails[i].attr_gp.attrs[1] = NULL;
rc = sysfs_create_group(psm_reg_kobj[i], &psm_rails[i].attr_gp);
if (rc) {
pr_err("%s: cannot create attribute group for %s\n",
KBUILD_MODNAME, psm_rails[i].name);
goto psm_node_exit;
}
}
return rc;
psm_node_exit:
if (rc) {
for (i = 0; i < psm_rails_cnt; i++) {
kobject_del(psm_reg_kobj[i]);
kfree(psm_rails[i].attr_gp.attrs);
}
if (psm_kobj)
kobject_del(psm_kobj);
}
return rc;
}
static int intel_mid_gps_init(struct platform_device *pdev)
{
int ret;
struct intel_mid_gps_platform_data *pdata = dev_get_drvdata(&pdev->dev);
struct kset *sysdev;
struct kobject *plat;
/* we need to rename the sysfs entry to match the one created with SFI,
and we are sure that there is always one GPS per platform */
if (ACPI_HANDLE(&pdev->dev)) {
ret = sysfs_rename_dir(&pdev->dev.kobj, DRIVER_NAME);
if (ret)
pr_err("%s: failed to rename sysfs entry\n", __func__);
}
ret = sysfs_create_group(&pdev->dev.kobj, &intel_mid_gps_attr_group);
if (ret)
dev_err(&pdev->dev,
"Failed to create intel_mid_gps sysfs interface\n");
/* With ACPI device tree, GPS is UART child, we need to create symlink at
/sys/devices/platform/ level (user libgps is expecting this). */
if (ACPI_HANDLE(&pdev->dev)) {
sysdev = pdev->dev.kobj.kset;
if (sysdev) {
plat = kset_find_obj(sysdev, "platform");
if (plat) {
ret = sysfs_create_link(plat,
&pdev->dev.kobj, DRIVER_NAME);
if (ret)
dev_err(&pdev->dev,
"%s: symlink creation failed\n", __func__);
}
}
}
/* Handle reset GPIO */
if (gpio_is_valid(pdata->gpio_reset)) {
/* Request gpio */
ret = gpio_request(pdata->gpio_reset, "intel_mid_gps_reset");
if (ret < 0) {
pr_err("%s: Unable to request GPIO:%d, err:%d\n",
__func__, pdata->gpio_reset, ret);
goto error_gpio_reset_request;
}
/* Force GPIO muxmode */
lnw_gpio_set_alt(pdata->gpio_reset, LNW_GPIO);
/* set gpio direction */
ret = gpio_direction_output(pdata->gpio_reset, pdata->reset);
if (ret < 0) {
pr_err("%s: Unable to set GPIO:%d direction, err:%d\n",
__func__, pdata->gpio_reset, ret);
goto error_gpio_reset_direction;
}
}
/* Handle enable GPIO */
if (gpio_is_valid(pdata->gpio_enable)) {
/* Request gpio */
ret = gpio_request(pdata->gpio_enable, "intel_mid_gps_enable");
if (ret < 0) {
pr_err("%s: Unable to request GPIO:%d, err:%d\n",
__func__, pdata->gpio_enable, ret);
goto error_gpio_enable_request;
}
/* Force GPIO muxmode */
lnw_gpio_set_alt(pdata->gpio_enable, LNW_GPIO);
/* set gpio direction */
ret = gpio_direction_output(pdata->gpio_enable, pdata->enable);
if (ret < 0) {
pr_err("%s: Unable to set GPIO:%d direction, err:%d\n",
__func__, pdata->gpio_enable, ret);
goto error_gpio_enable_direction;
}
}
/* Handle hostwake GPIO */
if (gpio_is_valid(pdata->gpio_hostwake)) {
int irq_id = -EINVAL;
/* Request gpio */
ret = gpio_request(pdata->gpio_hostwake, "intel_mid_gps_hostwake");
if (ret < 0) {
pr_err("%s: Unable to request GPIO:%d, err:%d\n",
__func__, pdata->gpio_hostwake, ret);
goto error_gpio_hostwake_request;
}
/* Force GPIO muxmode */
lnw_gpio_set_alt(pdata->gpio_hostwake, LNW_GPIO);
/* set gpio direction */
ret = gpio_direction_input(pdata->gpio_hostwake);
if (ret < 0) {
pr_err("%s: Unable to set GPIO:%d direction, err:%d\n",
__func__, pdata->gpio_hostwake, ret);
goto error_gpio_hostwake_direction;
}
/* configure irq handling */
irq_id = gpio_to_irq(pdata->gpio_hostwake);
irq_set_irq_wake(irq_id, 1);
ret = request_irq(irq_id, intel_mid_gps_hostwake_isr,
IRQF_TRIGGER_RISING,
"gps_hostwake", &pdev->dev);
if (ret) {
pr_err("%s: unable to request irq %d \n", __func__, irq_id);
goto error_gpio_hostwake_direction;
}
wake_lock_init(&hostwake_lock, WAKE_LOCK_SUSPEND, "gps_hostwake_lock");
}
return 0;
error_gpio_hostwake_direction:
gpio_free(pdata->gpio_hostwake);
error_gpio_hostwake_request:
error_gpio_enable_direction:
gpio_free(pdata->gpio_enable);
error_gpio_enable_request:
error_gpio_reset_direction:
gpio_free(pdata->gpio_reset);
error_gpio_reset_request:
sysfs_remove_group(&pdev->dev.kobj, &intel_mid_gps_attr_group);
return ret;
}