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platform/x86: intel_cht_int33fe: Supply fwnodes for the external dependencies

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Supplying also external devices, the DisplayPort connector
and the USB role switch, software fwnodes. After this the
driver has access to all the components tied to the USB
Type-C connector and can start creating software node
references to actually associate them with the USB Type-C
connector device.

Signed-off-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Tested-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Heikki Krogerus 2019-05-31 17:15:46 +03:00 committed by Rafael J. Wysocki
parent 9338aacf01
commit 62499330f7
1 changed files with 125 additions and 3 deletions
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128
drivers/platform/x86/intel_cht_int33fe.c
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@ -21,6 +21,7 @@
#include <linux/i2c.h>
#include <linux/interrupt.h>
#include <linux/module.h>
#include <linux/pci.h>
#include <linux/platform_device.h>
#include <linux/regulator/consumer.h>
#include <linux/slab.h>
@ -32,6 +33,8 @@ enum {
INT33FE_NODE_FUSB302,
INT33FE_NODE_MAX17047,
INT33FE_NODE_PI3USB30532,
INT33FE_NODE_DISPLAYPORT,
INT33FE_NODE_ROLE_SWITCH,
INT33FE_NODE_USB_CONNECTOR,
INT33FE_NODE_MAX,
};
@ -42,6 +45,9 @@ struct cht_int33fe_data {
struct i2c_client *pi3usb30532;
/* Contain a list-head must be per device */
struct device_connection connections[4];
struct fwnode_handle *dp;
struct fwnode_handle *mux;
};
/*
@ -110,10 +116,126 @@ static const struct software_node nodes[] = {
{ "fusb302", NULL, fusb302_props },
{ "max17047", NULL, max17047_props },
{ "pi3usb30532" },
{ "displayport" },
{ "usb-role-switch" },
{ "connector", &nodes[0], usb_connector_props },
{ }
};
static int cht_int33fe_setup_mux(struct cht_int33fe_data *data)
{
struct fwnode_handle *fwnode;
struct device *dev;
struct device *p;
fwnode = software_node_fwnode(&nodes[INT33FE_NODE_ROLE_SWITCH]);
if (!fwnode)
return -ENODEV;
/* First finding the platform device */
p = bus_find_device_by_name(&platform_bus_type, NULL,
"intel_xhci_usb_sw");
if (!p)
return -EPROBE_DEFER;
/* Then the mux child device */
dev = device_find_child_by_name(p, "intel_xhci_usb_sw-role-switch");
put_device(p);
if (!dev)
return -EPROBE_DEFER;
/* If there already is a node for the mux, using that one. */
if (dev->fwnode)
fwnode_remove_software_node(fwnode);
else
dev->fwnode = fwnode;
data->mux = fwnode_handle_get(dev->fwnode);
put_device(dev);
return 0;
}
static int cht_int33fe_setup_dp(struct cht_int33fe_data *data)
{
struct fwnode_handle *fwnode;
struct pci_dev *pdev;
fwnode = software_node_fwnode(&nodes[INT33FE_NODE_DISPLAYPORT]);
if (!fwnode)
return -ENODEV;
/* First let's find the GPU PCI device */
pdev = pci_get_class(PCI_CLASS_DISPLAY_VGA << 8, NULL);
if (!pdev || pdev->vendor != PCI_VENDOR_ID_INTEL) {
pci_dev_put(pdev);
return -ENODEV;
}
/* Then the DP child device node */
data->dp = device_get_named_child_node(&pdev->dev, "DD02");
pci_dev_put(pdev);
if (!data->dp)
return -ENODEV;
fwnode->secondary = ERR_PTR(-ENODEV);
data->dp->secondary = fwnode;
return 0;
}
static void cht_int33fe_remove_nodes(struct cht_int33fe_data *data)
{
software_node_unregister_nodes(nodes);
if (data->mux) {
fwnode_handle_put(data->mux);
data->mux = NULL;
}
if (data->dp) {
data->dp->secondary = NULL;
fwnode_handle_put(data->dp);
data->dp = NULL;
}
}
static int cht_int33fe_add_nodes(struct cht_int33fe_data *data)
{
int ret;
ret = software_node_register_nodes(nodes);
if (ret)
return ret;
/* The devices that are not created in this driver need extra steps. */
/*
* There is no ACPI device node for the USB role mux, so we need to find
* the mux device and assign our node directly to it. That means we
* depend on the mux driver. This function will return -PROBE_DEFER
* until the mux device is registered.
*/
ret = cht_int33fe_setup_mux(data);
if (ret)
goto err_remove_nodes;
/*
* The DP connector does have ACPI device node. In this case we can just
* find that ACPI node and assign our node as the secondary node to it.
*/
ret = cht_int33fe_setup_dp(data);
if (ret)
goto err_remove_nodes;
return 0;
err_remove_nodes:
cht_int33fe_remove_nodes(data);
return ret;
}
static int
cht_int33fe_register_max17047(struct device *dev, struct cht_int33fe_data *data)
{
@ -212,7 +334,7 @@ static int cht_int33fe_probe(struct platform_device *pdev)
if (!data)
return -ENOMEM;
ret = software_node_register_nodes(nodes);
ret = cht_int33fe_add_nodes(data);
if (ret)
return ret;
@ -281,7 +403,7 @@ out_unregister_max17047:
device_connections_remove(data->connections);
out_remove_nodes:
software_node_unregister_nodes(nodes);
cht_int33fe_remove_nodes(data);
return ret;
}
@ -295,7 +417,7 @@ static int cht_int33fe_remove(struct platform_device *pdev)
i2c_unregister_device(data->max17047);
device_connections_remove(data->connections);
software_node_unregister_nodes(nodes);
cht_int33fe_remove_nodes(data);
return 0;
}