[PATCH v4 13/16] platform/x86: intel_cht_int33fe: Provide software nodes for the devices

Heikki Krogerus
2019-05-22T10:51:48Z

Software nodes provide two features that we will need later.
1) Software nodes can have references to other software nodes.
2) Software nodes can exist before a device entry is created.

Signed-off-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
---
drivers/platform/x86/intel_cht_int33fe.c | 53 ++++++++++++++++++++----
1 file changed, 45 insertions(+), 8 deletions(-)

diff --git a/drivers/platform/x86/intel_cht_int33fe.c b/drivers/platform/x86/intel_cht_int33fe.c
index 4ab47d6df413..a4ebd1d6b5b6 100644
--- a/drivers/platform/x86/intel_cht_int33fe.c
+++ b/drivers/platform/x86/intel_cht_int33fe.c
@@ -27,6 +27,13 @@

#define EXPECTED_PTYPE 4

+enum {
+ INT33FE_NODE_FUSB302,
+ INT33FE_NODE_MAX17047,
+ INT33FE_NODE_PI3USB30532,
+ INT33FE_NODE_MAX,
+};
+
struct cht_int33fe_data {
struct i2c_client *max17047;
struct i2c_client *fusb302;
@@ -72,8 +79,13 @@ static const struct property_entry max17047_props[] = {

static const struct property_entry fusb302_props[] = {
PROPERTY_ENTRY_STRING("linux,extcon-name", "cht_wcove_pwrsrc"),
- PROPERTY_ENTRY_U32("fcs,max-sink-microvolt", 12000000),
- PROPERTY_ENTRY_U32("fcs,max-sink-microamp", 3000000),
+ { }
+};
+
+static const struct software_node nodes[] = {
+ { "fusb302", NULL, fusb302_props },
+ { "max17047", NULL, max17047_props },
+ { "pi3usb30532" },
{ }
};

@@ -82,14 +94,17 @@ cht_int33fe_register_max17047(struct device *dev, struct cht_int33fe_data *data)
{
struct i2c_client *max17047 = NULL;
struct i2c_board_info board_info;
+ struct fwnode_handle *fwnode;
int ret;

+ fwnode = software_node_fwnode(&nodes[INT33FE_NODE_MAX17047]);
+ if (!fwnode)
+ return -ENODEV;
+
i2c_for_each_dev(&max17047, cht_int33fe_check_for_max17047);
if (max17047) {
/* Pre-existing i2c-client for the max17047, add device-props */
- ret = device_add_properties(&max17047->dev, max17047_props);
- if (ret)
- return ret;
+ max17047->dev.fwnode->secondary = fwnode;
/* And re-probe to get the new device-props applied. */
ret = device_reprobe(&max17047->dev);
if (ret)
@@ -100,7 +115,7 @@ cht_int33fe_register_max17047(struct device *dev, struct cht_int33fe_data *data)
memset(&board_info, 0, sizeof(board_info));
strlcpy(board_info.type, "max17047", I2C_NAME_SIZE);
board_info.dev_name = "max17047";
- board_info.properties = max17047_props;
+ board_info.fwnode = fwnode;
data->max17047 = i2c_acpi_new_device(dev, 1, &board_info);

return PTR_ERR_OR_ZERO(data->max17047);
@@ -111,6 +126,7 @@ static int cht_int33fe_probe(struct platform_device *pdev)
struct device *dev = &pdev->dev;
struct i2c_board_info board_info;
struct cht_int33fe_data *data;
+ struct fwnode_handle *fwnode;
struct regulator *regulator;
unsigned long long ptyp;
acpi_status status;
@@ -170,10 +186,14 @@ static int cht_int33fe_probe(struct platform_device *pdev)
if (!data)
return -ENOMEM;

+ ret = software_node_register_nodes(nodes);
+ if (ret)
+ return ret;
+
/* Work around BIOS bug, see comment on cht_int33fe_check_for_max17047 */
ret = cht_int33fe_register_max17047(dev, data);
if (ret)
- return ret;
+ goto out_remove_nodes;

data->connections[0].endpoint[0] = "port0";
data->connections[0].endpoint[1] = "i2c-pi3usb30532-switch";
@@ -187,10 +207,16 @@ static int cht_int33fe_probe(struct platform_device *pdev)

device_connections_add(data->connections);

+ fwnode = software_node_fwnode(&nodes[INT33FE_NODE_FUSB302]);
+ if (!fwnode) {
+ ret = -ENODEV;
+ goto out_unregister_max17047;
+ }
+
memset(&board_info, 0, sizeof(board_info));
strlcpy(board_info.type, "typec_fusb302", I2C_NAME_SIZE);
board_info.dev_name = "fusb302";
- board_info.properties = fusb302_props;
+ board_info.fwnode = fwnode;
board_info.irq = fusb302_irq;

data->fusb302 = i2c_acpi_new_device(dev, 2, &board_info);
@@ -199,8 +225,15 @@ static int cht_int33fe_probe(struct platform_device *pdev)
goto out_unregister_max17047;
}

+ fwnode = software_node_fwnode(&nodes[INT33FE_NODE_PI3USB30532]);
+ if (!fwnode) {
+ ret = -ENODEV;
+ goto out_unregister_fusb302;
+ }
+
memset(&board_info, 0, sizeof(board_info));
board_info.dev_name = "pi3usb30532";
+ board_info.fwnode = fwnode;
strlcpy(board_info.type, "pi3usb30532", I2C_NAME_SIZE);

data->pi3usb30532 = i2c_acpi_new_device(dev, 3, &board_info);
@@ -221,6 +254,9 @@ static int cht_int33fe_probe(struct platform_device *pdev)

device_connections_remove(data->connections);

+out_remove_nodes:
+ software_node_unregister_nodes(nodes);
+
return ret;
}

@@ -233,6 +269,7 @@ static int cht_int33fe_remove(struct platform_device *pdev)
i2c_unregister_device(data->max17047);

device_connections_remove(data->connections);
+ software_node_unregister_nodes(nodes);

return 0;
}
--
2.20.1