static int pm8607_regulator_dt_init(struct platform_device *pdev,
struct pm8607_regulator_info *info,
struct regulator_config *config)
{
struct device_node *nproot, *np;
nproot = pdev->dev.parent->of_node;
if (!nproot)
return -ENODEV;
nproot = of_get_child_by_name(nproot, "regulators");
if (!nproot) {
dev_err(&pdev->dev, "failed to find regulators node\n");
return -ENODEV;
}
for_each_child_of_node(nproot, np) {
if (!of_node_cmp(np->name, info->desc.name)) {
config->init_data =
of_get_regulator_init_data(&pdev->dev, np,
&info->desc);
config->of_node = np;
break;
}
}
of_node_put(nproot);
return 0;
}
static int pm860x_backlight_dt_init(struct platform_device *pdev,
struct pm860x_backlight_data *data,
char *name)
{
struct device_node *nproot, *np;
int iset = 0;
nproot = of_node_get(pdev->dev.parent->of_node);
if (!nproot)
return -ENODEV;
nproot = of_find_node_by_name(nproot, "backlights");
if (!nproot) {
dev_err(&pdev->dev, "failed to find backlights node\n");
return -ENODEV;
}
for_each_child_of_node(nproot, np) {
if (!of_node_cmp(np->name, name)) {
of_property_read_u32(np, "marvell,88pm860x-iset",
&iset);
data->iset = PM8606_WLED_CURRENT(iset);
of_property_read_u32(np, "marvell,88pm860x-pwm",
&data->pwm);
break;
}
}
of_node_put(nproot);
return 0;
}
/**
* add_changeset_node() - add @node (and children) to overlay changeset
* @ovcs: overlay changeset
* @target_node: where to place @node in live tree
* @node: node from within overlay device tree fragment
*
* If @node does not already exist in @target_node, add changeset entry
* to add @node in @target_node.
*
* If @node already exists in @target_node, and the existing node has
* a phandle, the overlay node is not allowed to have a phandle.
*
* If @node has child nodes, add the children recursively via
* build_changeset_next_level().
*
* NOTE_1: A live devicetree created from a flattened device tree (FDT) will
* not contain the full path in node->full_name. Thus an overlay
* created from an FDT also will not contain the full path in
* node->full_name. However, a live devicetree created from Open
* Firmware may have the full path in node->full_name.
*
* add_changeset_node() follows the FDT convention and does not include
* the full path in node->full_name. Even though it expects the overlay
* to not contain the full path, it uses kbasename() to remove the
* full path should it exist. It also uses kbasename() in comparisons
* to nodes in the live devicetree so that it can apply an overlay to
* a live devicetree created from Open Firmware.
*
* NOTE_2: Multiple mods of created nodes not supported.
* If more than one fragment contains a node that does not already exist
* in the live tree, then for each fragment of_changeset_attach_node()
* will add a changeset entry to add the node. When the changeset is
* applied, __of_attach_node() will attach the node twice (once for
* each fragment). At this point the device tree will be corrupted.
*
* TODO: add integrity check to ensure that multiple fragments do not
* create the same node.
*
* Returns 0 on success, -ENOMEM if memory allocation failure, or -EINVAL if
* invalid @overlay.
*/
static int add_changeset_node(struct overlay_changeset *ovcs,
struct device_node *target_node, struct device_node *node)
{
const char *node_kbasename;
struct device_node *tchild;
int ret = 0;
node_kbasename = kbasename(node->full_name);
for_each_child_of_node(target_node, tchild)
if (!of_node_cmp(node_kbasename, kbasename(tchild->full_name)))
break;
if (!tchild) {
tchild = __of_node_dup(node, node_kbasename);
if (!tchild)
return -ENOMEM;
tchild->parent = target_node;
ret = of_changeset_attach_node(&ovcs->cset, tchild);
if (ret)
return ret;
return build_changeset_next_level(ovcs, tchild, node);
}
if (node->phandle && tchild->phandle)
ret = -EINVAL;
else
ret = build_changeset_next_level(ovcs, tchild, node);
of_node_put(tchild);
return ret;
}
static int xdmsc_parse_of(struct xdmsc_dev *xdmsc)
{
struct device *dev = xdmsc->xvip.dev;
struct device_node *node = dev->of_node;
struct device_node *ports;
struct device_node *port;
u32 port_id = 0;
int rval;
rval = of_property_read_u32(node, "xlnx,max-height",
&xdmsc->max_height);
if (rval < 0) {
dev_err(dev, "missing xlnx,max-height property!");
return -EINVAL;
} else if (xdmsc->max_height > XDEMOSAIC_MAX_HEIGHT ||
xdmsc->max_height < XDEMOSAIC_MIN_HEIGHT) {
dev_err(dev, "Invalid height in dt");
return -EINVAL;
}
rval = of_property_read_u32(node, "xlnx,max-width",
&xdmsc->max_width);
if (rval < 0) {
dev_err(dev, "missing xlnx,max-width property!");
return -EINVAL;
} else if (xdmsc->max_width > XDEMOSAIC_MAX_WIDTH ||
xdmsc->max_width < XDEMOSAIC_MIN_WIDTH) {
dev_err(dev, "Invalid width in dt");
return -EINVAL;
}
ports = of_get_child_by_name(node, "ports");
if (!ports)
ports = node;
/* Get the format description for each pad */
for_each_child_of_node(ports, port) {
if (port->name && (of_node_cmp(port->name, "port") == 0)) {
rval = of_property_read_u32(port, "reg", &port_id);
if (rval < 0) {
dev_err(dev, "No reg in DT");
return rval;
}
if (port_id != 0 && port_id != 1) {
dev_err(dev, "Invalid reg in DT");
return -EINVAL;
}
}
}
xdmsc->rst_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_HIGH);
if (IS_ERR(xdmsc->rst_gpio)) {
if (PTR_ERR(xdmsc->rst_gpio) != -EPROBE_DEFER)
dev_err(dev, "Reset GPIO not setup in DT");
return PTR_ERR(xdmsc->rst_gpio);
}
return 0;
}
static int s2mps13_pmic_dt_parse_pdata(struct sec_pmic_dev *iodev,
struct sec_platform_data *pdata)
{
struct device_node *pmic_np, *regulators_np, *reg_np;
struct sec_regulator_data *rdata;
unsigned int i;
pmic_np = iodev->dev->of_node;
if (!pmic_np) {
dev_err(iodev->dev, "could not find pmic sub-node\n");
return -ENODEV;
}
regulators_np = of_find_node_by_name(pmic_np, "regulators");
if (!regulators_np) {
dev_err(iodev->dev, "could not find regulators sub-node\n");
return -EINVAL;
}
/* count the number of regulators to be supported in pmic */
pdata->num_regulators = 0;
for_each_child_of_node(regulators_np, reg_np) {
pdata->num_regulators++;
}
rdata = devm_kzalloc(iodev->dev, sizeof(*rdata) *
pdata->num_regulators, GFP_KERNEL);
if (!rdata) {
dev_err(iodev->dev,
"could not allocate memory for regulator data\n");
return -ENOMEM;
}
pdata->regulators = rdata;
s2mps13_desc_type = iodev->rev_num ? S2MPS13_DESC_TYPE1 : S2MPS13_DESC_TYPE0;
for_each_child_of_node(regulators_np, reg_np) {
for (i = 0; i < ARRAY_SIZE(regulators[s2mps13_desc_type]); i++)
if (!of_node_cmp(reg_np->name,
regulators[s2mps13_desc_type][i].name))
break;
if (i == ARRAY_SIZE(regulators[s2mps13_desc_type])) {
dev_warn(iodev->dev,
"don't know how to configure regulator %s\n",
reg_np->name);
continue;
}
rdata->id = i;
rdata->initdata = of_get_regulator_init_data(
iodev->dev, reg_np);
rdata->reg_node = reg_np;
rdata++;
}
return 0;
}
/**
* of_get_child_by_name - Find the child node by name for a given parent
* @node: parent node
* @name: child name to look for.
*
* This function looks for child node for given matching name
*
* Returns a node pointer if found, with refcount incremented, use
* of_node_put() on it when done.
* Returns NULL if node is not found.
*/
struct device_node *of_get_child_by_name(const struct device_node *node,
const char *name)
{
struct device_node *child;
for_each_child_of_node(node, child)
if (child->name && (of_node_cmp(child->name, name) == 0))
break;
return child;
}
/* Register all SoC external sub-devices */
static int fimc_md_register_sensor_entities(struct fimc_md *fmd)
{
struct device_node *parent = fmd->pdev->dev.of_node;
struct device_node *node, *ports;
int index = 0;
int ret;
/*
* Runtime resume one of the FIMC entities to make sure
* the sclk_cam clocks are not globally disabled.
*/
if (!fmd->pmf)
return -ENXIO;
ret = pm_runtime_get_sync(fmd->pmf);
if (ret < 0)
return ret;
fmd->num_sensors = 0;
/* Attach sensors linked to MIPI CSI-2 receivers */
for_each_available_child_of_node(parent, node) {
struct device_node *port;
if (of_node_cmp(node->name, "csis"))
continue;
/* The csis node can have only port subnode. */
port = of_get_next_child(node, NULL);
if (!port)
continue;
ret = fimc_md_parse_port_node(fmd, port, index);
if (ret < 0) {
of_node_put(node);
goto rpm_put;
}
index++;
}
/* Attach sensors listed in the parallel-ports node */
ports = of_get_child_by_name(parent, "parallel-ports");
if (!ports)
goto rpm_put;
for_each_child_of_node(ports, node) {
ret = fimc_md_parse_port_node(fmd, node, index);
if (ret < 0) {
of_node_put(node);
break;
}
index++;
}
/**
* of_find_node_by_path - Find a node matching a full OF path
* @path: The full path to match
*
* Returns a node pointer with refcount incremented, use
* of_node_put() on it when done.
*/
struct device_node *of_find_node_by_path(const char *path)
{
struct device_node *np = allnodes;
read_lock(&devtree_lock);
for (; np; np = np->allnext) {
if (np->full_name && (of_node_cmp(np->full_name, path) == 0)
&& of_node_get(np))
break;
}
read_unlock(&devtree_lock);
return np;
}
int of_device_is_compatible(const struct device_node *device,
const char *compat, const char *type,
const char *name)
{
struct property *prop;
const char *cp;
int index = 0, score = 0;
/* Compatible match has highest priority */
if (compat && compat[0]) {
prop = of_find_property(device, "compatible", NULL);
for (cp = of_prop_next_string(prop, NULL); cp;
cp = of_prop_next_string(prop, cp), index++) {
if (of_compat_cmp(cp, compat, strlen(compat)) == 0) {
score = INT_MAX/2 - (index << 2);
break;
}
}
if (!score)
return 0;
}
/* Matching type is better than matching name */
if (type && type[0]) {
if (!device->type || of_node_cmp(type, device->type))
return 0;
score += 2;
}
/* Matching name is a bit better than not */
if (name && name[0]) {
if (!device->name || of_node_cmp(name, device->name))
return 0;
score++;
}
return score;
}
struct mc13xxx_regulator_init_data *mc13xxx_parse_regulators_dt(
struct platform_device *pdev, struct mc13xxx_regulator *regulators,
int num_regulators)
{
struct mc13xxx_regulator_priv *priv = platform_get_drvdata(pdev);
struct mc13xxx_regulator_init_data *data, *p;
struct device_node *parent, *child;
int i, parsed = 0;
if (!pdev->dev.parent->of_node)
return NULL;
parent = of_get_child_by_name(pdev->dev.parent->of_node, "regulators");
if (!parent)
return NULL;
data = devm_kzalloc(&pdev->dev, sizeof(*data) * priv->num_regulators,
GFP_KERNEL);
if (!data) {
of_node_put(parent);
return NULL;
}
p = data;
for_each_child_of_node(parent, child) {
int found = 0;
for (i = 0; i < num_regulators; i++) {
if (!regulators[i].desc.name)
continue;
if (!of_node_cmp(child->name,
regulators[i].desc.name)) {
p->id = i;
p->init_data = of_get_regulator_init_data(
&pdev->dev, child,
®ulators[i].desc);
p->node = child;
p++;
parsed++;
found = 1;
break;
}
}
if (!found)
dev_warn(&pdev->dev,
"Unknown regulator: %s\n", child->name);
}
/**
* of_find_node_by_path - Find a node matching a full OF path
* @path: The full path to match
*
* Returns a node pointer with refcount incremented, use
* of_node_put() on it when done.
*/
struct device_node *of_find_node_by_path(const char *path)
{
struct device_node *np = of_allnodes;
unsigned long flags;
raw_spin_lock_irqsave(&devtree_lock, flags);
for (; np; np = np->allnext) {
if (np->full_name && (of_node_cmp(np->full_name, path) == 0)
&& of_node_get(np))
break;
}
raw_spin_unlock_irqrestore(&devtree_lock, flags);
return np;
}
/**
* of_find_node_by_type - Find a node by its "device_type" property
* @from: The node to start searching from, or NULL to start searching
* the entire device tree. The node you pass will not be
* searched, only the next one will; typically, you pass
* what the previous call returned. of_node_put() will be
* called on from for you.
* @type: The type string to match against
*
* Returns a node pointer with refcount incremented, use
* of_node_put() on it when done.
*/
struct device_node *of_find_node_by_type(struct device_node *from,
const char *type)
{
struct device_node *np;
read_lock(&devtree_lock);
np = from ? from->allnext : allnodes;
for (; np; np = np->allnext)
if (np->type && (of_node_cmp(np->type, type) == 0)
&& of_node_get(np))
break;
of_node_put(from);
read_unlock(&devtree_lock);
return np;
}
/**
* of_find_node_by_type - Find a node by its "device_type" property
* @from: The node to start searching from, or NULL to start searching
* the entire device tree. The node you pass will not be
* searched, only the next one will; typically, you pass
* what the previous call returned. of_node_put() will be
* called on from for you.
* @type: The type string to match against
*
* Returns a node pointer with refcount incremented, use
* of_node_put() on it when done.
*/
struct device_node *of_find_node_by_type(struct device_node *from,
const char *type)
{
struct device_node *np;
unsigned long flags;
raw_spin_lock_irqsave(&devtree_lock, flags);
np = from ? from->allnext : of_allnodes;
for (; np; np = np->allnext)
if (np->type && (of_node_cmp(np->type, type) == 0)
&& of_node_get(np))
break;
of_node_put(from);
raw_spin_unlock_irqrestore(&devtree_lock, flags);
return np;
}
/**
* of_graph_get_port_by_id() - get the port matching a given id
* @parent: pointer to the parent device node
* @id: id of the port
*
* Return: A 'port' node pointer with refcount incremented. The caller
* has to use of_node_put() on it when done.
*/
struct device_node *of_graph_get_port_by_id(struct device_node *parent, u32 id)
{
struct device_node *node, *port;
node = of_get_child_by_name(parent, "ports");
if (node)
parent = node;
for_each_child_of_node(parent, port) {
u32 port_id = 0;
if (of_node_cmp(port->name, "port") != 0)
continue;
of_property_read_u32(port, "reg", &port_id);
if (id == port_id)
break;
}
/* of_* functions will be removed after merge of of_graph patches */
static struct device_node *
of_get_child_by_name_reg(struct device_node *parent, const char *name, u32 reg)
{
struct device_node *np;
for_each_child_of_node(parent, np) {
u32 r;
if (!np->name || of_node_cmp(np->name, name))
continue;
if (of_property_read_u32(np, "reg", &r) < 0)
r = 0;
if (reg == r)
break;
}
/**
* Find a node with the give full name by recursively following any of
* the child node links.
*/
static struct device_node *__of_find_node_by_full_name(struct device_node *node,
const char *full_name)
{
struct device_node *child, *found;
if (node == NULL)
return NULL;
/* check */
if (of_node_cmp(node->full_name, full_name) == 0)
return node;
for_each_child_of_node(node, child) {
found = __of_find_node_by_full_name(child, full_name);
if (found != NULL)
return found;
}
/**
* of_find_compatible_node - Find a node based on type and one of the
* tokens in its "compatible" property
* @from: The node to start searching from or NULL, the node
* you pass will not be searched, only the next one
* will; typically, you pass what the previous call
* returned. of_node_put() will be called on it
* @type: The type string to match "device_type" or NULL to ignore
* @compatible: The string to match to one of the tokens in the device
* "compatible" list.
*
* Returns a node pointer with refcount incremented, use
* of_node_put() on it when done.
*/
struct device_node *of_find_compatible_node(struct device_node *from,
const char *type, const char *compatible)
{
struct device_node *np;
read_lock(&devtree_lock);
np = from ? from->allnext : allnodes;
for (; np; np = np->allnext) {
if (type
&& !(np->type && (of_node_cmp(np->type, type) == 0)))
continue;
if (of_device_is_compatible(np, compatible) && of_node_get(np))
break;
}
of_node_put(from);
read_unlock(&devtree_lock);
return np;
}
struct device_node *
omapdss_of_get_next_endpoint(const struct device_node *parent,
struct device_node *prev)
{
struct device_node *ep = NULL;
if (!parent)
return NULL;
do {
ep = of_get_next_child(parent, prev);
if (!ep)
return NULL;
prev = ep;
} while (of_node_cmp(ep->name, "endpoint") != 0);
return ep;
}
/**
* Find a node with the give full name by recursively following any of
* the child node links.
*/
static struct device_node *find_node_by_full_name(struct device_node *node,
const char *full_name)
{
struct device_node *child, *found;
if (!node)
return NULL;
if (!of_node_cmp(node->full_name, full_name))
return of_node_get(node);
for_each_child_of_node(node, child) {
found = find_node_by_full_name(child, full_name);
if (found != NULL) {
of_node_put(child);
return found;
}
}
struct device_node *
omapdss_of_get_next_port(const struct device_node *parent,
struct device_node *prev)
{
struct device_node *port = NULL;
if (!parent)
return NULL;
if (!prev) {
struct device_node *ports;
/*
* It's the first call, we have to find a port subnode
* within this node or within an optional 'ports' node.
*/
ports = of_get_child_by_name(parent, "ports");
if (ports)
parent = ports;
port = of_get_child_by_name(parent, "port");
/* release the 'ports' node */
of_node_put(ports);
} else {
struct device_node *ports;
ports = of_get_parent(prev);
if (!ports)
return NULL;
do {
port = of_get_next_child(ports, prev);
if (!port) {
of_node_put(ports);
return NULL;
}
prev = port;
} while (of_node_cmp(port->name, "port") != 0);
of_node_put(ports);
}
return port;
}
static int compare_of(struct device *dev, void *data)
{
struct device_node *np = data;
/* Special case for DI, dev->of_node may not be set yet */
if (strcmp(dev->driver->name, "imx-ipuv3-crtc") == 0) {
struct ipu_client_platformdata *pdata = dev->platform_data;
return pdata->of_node == np;
}
/* Special case for LDB, one device for two channels */
if (of_node_cmp(np->name, "lvds-channel") == 0) {
np = of_get_parent(np);
of_node_put(np);
}
return dev->of_node == np;
}
/**
* of_find_compatible_node - Find a node based on type and one of the
* tokens in its "compatible" property
* @from: The node to start searching from or NULL, the node
* you pass will not be searched, only the next one
* will; typically, you pass what the previous call
* returned. of_node_put() will be called on it
* @type: The type string to match "device_type" or NULL to ignore
* @compatible: The string to match to one of the tokens in the device
* "compatible" list.
*
* Returns a node pointer with refcount incremented, use
* of_node_put() on it when done.
*/
struct device_node *of_find_compatible_node(struct device_node *from,
const char *type, const char *compatible)
{
struct device_node *np;
unsigned long flags;
raw_spin_lock_irqsave(&devtree_lock, flags);
np = from ? from->allnext : of_allnodes;
for (; np; np = np->allnext) {
if (type
&& !(np->type && (of_node_cmp(np->type, type) == 0)))
continue;
if (__of_device_is_compatible(np, compatible) &&
of_node_get(np))
break;
}
of_node_put(from);
raw_spin_unlock_irqrestore(&devtree_lock, flags);
return np;
}
/**
* device_get_named_child_node - Return first matching named child node handle
* @dev: Device to find the named child node for.
* @childname: String to match child node name against.
*/
struct fwnode_handle *device_get_named_child_node(struct device *dev,
const char *childname)
{
struct fwnode_handle *child;
/*
* Find first matching named child node of this device.
* For ACPI this will be a data only sub-node.
*/
device_for_each_child_node(dev, child) {
if (is_of_node(child)) {
if (!of_node_cmp(to_of_node(child)->name, childname))
return child;
} else if (is_acpi_data_node(child)) {
if (acpi_data_node_match(child, childname))
return child;
}
}
return NULL;
}
static struct device_node *ipu_drm_get_port_by_id(struct device_node *parent,
int port_id)
{
struct device_node *port;
int id, ret;
port = of_get_child_by_name(parent, "port");
while (port) {
ret = of_property_read_u32(port, "reg", &id);
if (!ret && id == port_id)
return port;
do {
port = of_get_next_child(parent, port);
if (!port)
return NULL;
} while (of_node_cmp(port->name, "port"));
}
return NULL;
}
/**
* v4l2_of_get_next_endpoint() - get next endpoint node
* @parent: pointer to the parent device node
* @prev: previous endpoint node, or NULL to get first
*
* Return: An 'endpoint' node pointer with refcount incremented. Refcount
* of the passed @prev node is not decremented, the caller have to use
* of_node_put() on it when done.
*/
struct device_node *v4l2_of_get_next_endpoint(const struct device_node *parent,
struct device_node *prev)
{
struct device_node *endpoint;
struct device_node *port = NULL;
if (!parent)
return NULL;
if (!prev) {
struct device_node *node;
/*
* It's the first call, we have to find a port subnode
* within this node or within an optional 'ports' node.
*/
node = of_get_child_by_name(parent, "ports");
if (node)
parent = node;
for_each_child_of_node(parent, node) {
if (!of_node_cmp(node->name, "port")) {
port = node;
break;
}
}
if (port) {
/* Found a port, get an endpoint. */
endpoint = of_get_next_child(port, NULL);
of_node_put(port);
} else {
endpoint = NULL;
}
if (!endpoint)
pr_err("%s(): no endpoint nodes specified for %s\n",
__func__, parent->full_name);
} else {
struct mc13xxx_regulator_init_data * __devinit mc13xxx_parse_regulators_dt(
struct platform_device *pdev, struct mc13xxx_regulator *regulators,
int num_regulators)
{
struct mc13xxx_regulator_priv *priv = platform_get_drvdata(pdev);
struct mc13xxx_regulator_init_data *data, *p;
struct device_node *parent, *child;
int i;
of_node_get(pdev->dev.parent->of_node);
parent = of_find_node_by_name(pdev->dev.parent->of_node, "regulators");
if (!parent)
return NULL;
data = devm_kzalloc(&pdev->dev, sizeof(*data) * priv->num_regulators,
GFP_KERNEL);
if (!data)
return NULL;
p = data;
for_each_child_of_node(parent, child) {
for (i = 0; i < num_regulators; i++) {
if (!of_node_cmp(child->name,
regulators[i].desc.name)) {
p->id = i;
p->init_data = of_get_regulator_init_data(
&pdev->dev, child);
p->node = child;
p++;
break;
}
}
}
return data;
}
/* Register all SoC external sub-devices */
static int fimc_md_of_sensors_register(struct fimc_md *fmd,
struct device_node *np)
{
struct device_node *parent = fmd->pdev->dev.of_node;
struct device_node *node, *ports;
int index = 0;
int ret;
/* Attach sensors linked to MIPI CSI-2 receivers */
for_each_available_child_of_node(parent, node) {
struct device_node *port;
if (of_node_cmp(node->name, "csis"))
continue;
/* The csis node can have only port subnode. */
port = of_get_next_child(node, NULL);
if (!port)
continue;
ret = fimc_md_parse_port_node(fmd, port, index);
if (ret < 0)
return ret;
index++;
}
/* Attach sensors listed in the parallel-ports node */
ports = of_get_child_by_name(parent, "parallel-ports");
if (!ports)
return 0;
for_each_child_of_node(ports, node) {
ret = fimc_md_parse_port_node(fmd, node, index);
if (ret < 0)
break;
index++;
}
static int s2mps13_pmic_dt_parse_pdata(struct sec_pmic_dev *iodev,
struct sec_platform_data *pdata)
{
struct device_node *pmic_np, *regulators_np, *reg_np;
struct sec_regulator_data *rdata;
unsigned int i, s2mps13_desc_type;
int ret;
u32 val;
pmic_np = iodev->dev->of_node;
if (!pmic_np) {
dev_err(iodev->dev, "could not find pmic sub-node\n");
return -ENODEV;
}
/* If pmic revision number over 0x02, get 3 gpio values */
if (SEC_PMIC_REV(iodev) > 0x02) {
if (of_gpio_count(pmic_np) < 3) {
dev_err(iodev->dev, "could not find pmic gpios\n");
return -EINVAL;
}
pdata->smpl_warn = of_get_gpio(pmic_np, 0);
pdata->g3d_pin = of_get_gpio(pmic_np, 1);
pdata->dvs_pin = of_get_gpio(pmic_np, 2);
ret = of_property_read_u32(pmic_np, "g3d_en", &val);
if (ret)
return -EINVAL;
pdata->g3d_en = !!val;
ret = of_property_read_u32(pmic_np, "dvs_en", &val);
if (ret)
return -EINVAL;
pdata->dvs_en = !!val;
ret = of_property_read_u32(pmic_np, "smpl_warn_en", &val);
if (ret)
return -EINVAL;
pdata->smpl_warn_en = !!val;
} else {
dev_err(iodev->dev, "cannot control g3d_en & dvs_en\n");
}
pdata->ap_buck_avp_en = false;
pdata->sub_buck_avp_en = false;
if (of_find_property(pmic_np, "ap-buck-avp-en", NULL))
pdata->ap_buck_avp_en = true;
if (of_find_property(pmic_np, "sub-buck-avp-en", NULL))
pdata->sub_buck_avp_en = true;
regulators_np = of_find_node_by_name(pmic_np, "regulators");
if (!regulators_np) {
dev_err(iodev->dev, "could not find regulators sub-node\n");
return -EINVAL;
}
/* count the number of regulators to be supported in pmic */
pdata->num_regulators = 0;
for_each_child_of_node(regulators_np, reg_np) {
pdata->num_regulators++;
}
rdata = devm_kzalloc(iodev->dev, sizeof(*rdata) *
pdata->num_regulators, GFP_KERNEL);
if (!rdata) {
dev_err(iodev->dev,
"could not allocate memory for regulator data\n");
return -ENOMEM;
}
pdata->regulators = rdata;
s2mps13_desc_type = SEC_PMIC_REV(iodev) ? S2MPS13_DESC_TYPE1 : S2MPS13_DESC_TYPE0;
for_each_child_of_node(regulators_np, reg_np) {
for (i = 0; i < ARRAY_SIZE(regulators[s2mps13_desc_type]); i++)
if (!of_node_cmp(reg_np->name,
regulators[s2mps13_desc_type][i].name))
break;
if (i == ARRAY_SIZE(regulators[s2mps13_desc_type])) {
dev_warn(iodev->dev,
"don't know how to configure regulator %s\n",
reg_np->name);
continue;
}
rdata->id = i;
rdata->initdata = of_get_regulator_init_data(
iodev->dev, reg_np);
rdata->reg_node = reg_np;
rdata++;
}
return 0;
}
/*! 20140104
* cpus device node 자식의 cpu device node의 reg property 값을 가지고
* dtb 유효성 검사 후 __cpu_logical_map 초기화
*/
void __init arm_dt_init_cpu_maps(void)
{
/*
* Temp logical map is initialized with UINT_MAX values that are
* considered invalid logical map entries since the logical map must
* contain a list of MPIDR[23:0] values where MPIDR[31:24] must
* read as 0.
*/
struct device_node *cpu, *cpus;
u32 i, j, cpuidx = 1;
/*! 20140104 mpidr[23:0] 값 추출 / MPIDR_HWID_BITMASK 0xFFFFFF */
u32 mpidr = is_smp() ? read_cpuid_mpidr() & MPIDR_HWID_BITMASK : 0;
/*! 20140104
* 0 ~ NR_CPUS(4)-1 까지의 Index에 MPIDR_INVALID(0xFF000000) 을 삽입
* - gcc manual -
* To initialize a range of elements to the same value,
* write '[FIRST ...LAST] = VALUE'. This is a GNU extension. For example,
* ex) int widths[] = { [0 ... 9] = 1, [10 ... 99] = 2, [100] = 3 };
*/
u32 tmp_map[NR_CPUS] = { [0 ... NR_CPUS-1] = MPIDR_INVALID };
bool bootcpu_valid = false;
/*! 20140104 cpus device node를 찾음 */
cpus = of_find_node_by_path("/cpus");
if (!cpus)
return;
/*! 20140104
*
cpus {
#address-cells = <0x1>;
#size-cells = <0x0>;
cpu@0 {
device_type = "cpu";
compatible = "arm,cortex-a15";
reg = <0x0>;
clock-frequency = <0x6b49d200>;
};
cpu@1 {
device_type = "cpu";
compatible = "arm,cortex-a15";
reg = <0x1>;
clock-frequency = <0x6b49d200>;
};
...생략
};
*/
/*! 20140104
* parent = cpus / child = cpu (child 는 각 cpus device node의 cpu device node를 나타냄)
* of_get_next_child는 parent의 자식에 대한 device node 또는 자식의 sibling들을 반환
* - for_each_child_of_node -
* for (child = of_get_next_child(parent, NULL); child != NULL;
* child = of_get_next_child(parent, child))
*/
for_each_child_of_node(cpus, cpu) {
u32 hwid;
/*! 20140104 cpu device node의 type이 'cpu'인지 확인 */
if (of_node_cmp(cpu->type, "cpu"))
continue;
pr_debug(" * %s...\n", cpu->full_name);
/*
* A device tree containing CPU nodes with missing "reg"
* properties is considered invalid to build the
* cpu_logical_map.
*/
/*! 20140104 cpu device node의 reg property의 값을 hwid에 할당 */
if (of_property_read_u32(cpu, "reg", &hwid)) {
pr_debug(" * %s missing reg property\n",
cpu->full_name);
return;
}
/*
* 8 MSBs must be set to 0 in the DT since the reg property
* defines the MPIDR[23:0].
*/
/*! 20140104
* hwid & ~MPIDR_HWID_BITMASK(0xFF000000)
* 상위 8bit가 설정되어 있으면 return
*/
if (hwid & ~MPIDR_HWID_BITMASK)
return;
/*
* Duplicate MPIDRs are a recipe for disaster.
* Scan all initialized entries and check for
* duplicates. If any is found just bail out.
* temp values were initialized to UINT_MAX
* to avoid matching valid MPIDR[23:0] values.
*/
/*! 20140104 동일한 reg 값이 존재하면 중복됫다고 하고 return */
for (j = 0; j < cpuidx; j++)
if (WARN(tmp_map[j] == hwid, "Duplicate /cpu reg "
"properties in the DT\n"))
return;
/*
* Build a stashed array of MPIDR values. Numbering scheme
* requires that if detected the boot CPU must be assigned
* logical id 0. Other CPUs get sequential indexes starting
* from 1. If a CPU node with a reg property matching the
* boot CPU MPIDR is detected, this is recorded so that the
* logical map built from DT is validated and can be used
* to override the map created in smp_setup_processor_id().
*/
/*! 20140104 hwid == mpidr 과 같으면 booting cpu 보통 첫번째 cpu, i = cpuidx */
if (hwid == mpidr) {
i = 0;
bootcpu_valid = true;
} else {
i = cpuidx++;
}
/*! 20140104 Kernel config 값인 nr_cpu_ids 값보다 cpuidx가 크면 nr_cpu_ids 이상의 cpu값들은 무시됨 */
if (WARN(cpuidx > nr_cpu_ids, "DT /cpu %u nodes greater than "
"max cores %u, capping them\n",
cpuidx, nr_cpu_ids)) {
cpuidx = nr_cpu_ids;
break;
}
tmp_map[i] = hwid;
}
static int max17135_pmic_dt_parse_pdata(struct platform_device *pdev,
struct max17135_platform_data *pdata)
{
struct max17135 *max17135 = dev_get_drvdata(pdev->dev.parent);
struct device_node *pmic_np, *regulators_np, *reg_np;
struct max17135_regulator_data *rdata;
int i, ret;
pmic_np = of_node_get(max17135->dev->of_node);
if (!pmic_np) {
dev_err(&pdev->dev, "could not find pmic sub-node\n");
return -ENODEV;
}
regulators_np = of_find_node_by_name(pmic_np, "regulators");
if (!regulators_np) {
dev_err(&pdev->dev, "could not find regulators sub-node\n");
return -EINVAL;
}
pdata->num_regulators = of_get_child_count(regulators_np);
dev_dbg(&pdev->dev, "num_regulators %d\n", pdata->num_regulators);
rdata = devm_kzalloc(&pdev->dev, sizeof(*rdata) *
pdata->num_regulators, GFP_KERNEL);
if (!rdata) {
of_node_put(regulators_np);
dev_err(&pdev->dev, "could not allocate memory for"
"regulator data\n");
return -ENOMEM;
}
pdata->regulators = rdata;
for_each_child_of_node(regulators_np, reg_np) {
for (i = 0; i < ARRAY_SIZE(max17135_reg); i++)
if (!of_node_cmp(reg_np->name, max17135_reg[i].name))
break;
if (i == ARRAY_SIZE(max17135_reg)) {
dev_warn(&pdev->dev, "don't know how to configure"
"regulator %s\n", reg_np->name);
continue;
}
rdata->id = i;
rdata->initdata = of_get_regulator_init_data(&pdev->dev,
reg_np,
&max17135_reg[i]);
rdata->reg_node = reg_np;
rdata++;
}
of_node_put(regulators_np);
CHECK_PROPERTY_ERROR_KFREE(vneg_pwrup);
CHECK_PROPERTY_ERROR_KFREE(gvee_pwrup);
CHECK_PROPERTY_ERROR_KFREE(vpos_pwrup);
CHECK_PROPERTY_ERROR_KFREE(gvdd_pwrup);
CHECK_PROPERTY_ERROR_KFREE(gvdd_pwrdn);
CHECK_PROPERTY_ERROR_KFREE(vpos_pwrdn);
CHECK_PROPERTY_ERROR_KFREE(gvee_pwrdn);
CHECK_PROPERTY_ERROR_KFREE(vneg_pwrdn);
dev_dbg(&pdev->dev, "vneg_pwrup %d, vneg_pwrdn %d, vpos_pwrup %d,"
"vpos_pwrdn %d, gvdd_pwrup %d, gvdd_pwrdn %d, gvee_pwrup %d,"
"gvee_pwrdn %d\n", max17135->vneg_pwrup, max17135->vneg_pwrdn,
max17135->vpos_pwrup, max17135->vpos_pwrdn,
max17135->gvdd_pwrup, max17135->gvdd_pwrdn,
max17135->gvee_pwrup, max17135->gvee_pwrdn);
max17135->max_wait = max17135->vpos_pwrup + max17135->vneg_pwrup +
max17135->gvdd_pwrup + max17135->gvee_pwrup;
max17135->gpio_pmic_wakeup = of_get_named_gpio(pmic_np,
"gpio_pmic_wakeup", 0);
if (!gpio_is_valid(max17135->gpio_pmic_wakeup)) {
dev_err(&pdev->dev, "no epdc pmic wakeup pin available\n");
goto err;
}
ret = devm_gpio_request_one(&pdev->dev, max17135->gpio_pmic_wakeup,
GPIOF_OUT_INIT_LOW, "epdc-pmic-wake");
if (ret < 0)
goto err;
max17135->gpio_pmic_vcom_ctrl = of_get_named_gpio(pmic_np,
"gpio_pmic_vcom_ctrl", 0);
if (!gpio_is_valid(max17135->gpio_pmic_vcom_ctrl)) {
dev_err(&pdev->dev, "no epdc pmic vcom_ctrl pin available\n");
goto err;
}
ret = devm_gpio_request_one(&pdev->dev, max17135->gpio_pmic_vcom_ctrl,
GPIOF_OUT_INIT_LOW, "epdc-vcom");
if (ret < 0)
goto err;
max17135->gpio_pmic_v3p3 = of_get_named_gpio(pmic_np,
"gpio_pmic_v3p3", 0);
if (!gpio_is_valid(max17135->gpio_pmic_v3p3)) {
dev_err(&pdev->dev, "no epdc pmic v3p3 pin available\n");
goto err;
}
ret = devm_gpio_request_one(&pdev->dev, max17135->gpio_pmic_v3p3,
GPIOF_OUT_INIT_LOW, "epdc-v3p3");
if (ret < 0)
goto err;
max17135->gpio_pmic_intr = of_get_named_gpio(pmic_np,
"gpio_pmic_intr", 0);
if (!gpio_is_valid(max17135->gpio_pmic_intr)) {
dev_err(&pdev->dev, "no epdc pmic intr pin available\n");
goto err;
}
ret = devm_gpio_request_one(&pdev->dev, max17135->gpio_pmic_intr,
GPIOF_IN, "epdc-pmic-int");
if (ret < 0)
goto err;
max17135->gpio_pmic_pwrgood = of_get_named_gpio(pmic_np,
"gpio_pmic_pwrgood", 0);
if (!gpio_is_valid(max17135->gpio_pmic_pwrgood)) {
dev_err(&pdev->dev, "no epdc pmic pwrgood pin available\n");
goto err;
}
ret = devm_gpio_request_one(&pdev->dev, max17135->gpio_pmic_pwrgood,
GPIOF_IN, "epdc-pwrstat");
if (ret < 0)
goto err;
err:
return 0;
}