[PATCH V5 3/6] usb: typec: ucsi_ccg: Add OF support

[Jon Hunter <jonathanh@nvidia.com>]

From: Wayne Chang <waynec@nvidia.com>

Add device-tree support for the Cypress CCG UCSI driver. The device-tree
binding for the Cypress CCG device uses the standard device-tree
'firmware-name' string property to indicate the firmware build that is
used. For ACPI a 16-bit property named 'ccgx,firmware-build' is used and
if this is not found fall back to the 'firmware-name' property.

Signed-off-by: Wayne Chang <waynec@nvidia.com>
Co-developed-by: Jon Hunter <jonathanh@nvidia.com>
Signed-off-by: Jon Hunter <jonathanh@nvidia.com>
---
V4 -> V5: add support for 'firmware-name'
V1 -> V4: nothing has changed

 drivers/usb/typec/ucsi/ucsi_ccg.c | 23 +++++++++++++++++++++--
 1 file changed, 21 insertions(+), 2 deletions(-)

diff --git a/drivers/usb/typec/ucsi/ucsi_ccg.c b/drivers/usb/typec/ucsi/ucsi_ccg.c
index 46441f1477f2..889a831e251d 100644
--- a/drivers/usb/typec/ucsi/ucsi_ccg.c
+++ b/drivers/usb/typec/ucsi/ucsi_ccg.c
@@ -643,7 +643,7 @@ static int ccg_request_irq(struct ucsi_ccg *uc)
 {
 	unsigned long flags = IRQF_ONESHOT;
 
-	if (!has_acpi_companion(uc->dev))
+	if (!dev_fwnode(uc->dev))
 		flags |= IRQF_TRIGGER_HIGH;
 
 	return request_threaded_irq(uc->irq, NULL, ccg_irq_handler, flags, dev_name(uc->dev), uc);
@@ -1342,6 +1342,7 @@ static int ucsi_ccg_probe(struct i2c_client *client)
 {
 	struct device *dev = &client->dev;
 	struct ucsi_ccg *uc;
+	const char *fw_name;
 	int status;
 
 	uc = devm_kzalloc(dev, sizeof(*uc), GFP_KERNEL);
@@ -1359,7 +1360,18 @@ static int ucsi_ccg_probe(struct i2c_client *client)
 	/* Only fail FW flashing when FW build information is not provided */
 	status = device_property_read_u16(dev, "ccgx,firmware-build",
 					  &uc->fw_build);
-	if (status)
+	if (status) {
+		status = device_property_read_string(dev, "firmware-name",
+						     &fw_name);
+		if (!status) {
+			if (!strcmp(fw_name, "nvidia,jetson-agx-xavier"))
+				uc->fw_build = CCG_FW_BUILD_NVIDIA_TEGRA;
+			else if (!strcmp(fw_name, "nvidia,gpu"))
+				uc->fw_build = CCG_FW_BUILD_NVIDIA;
+		}
+	}
+
+	if (!uc->fw_build)
 		dev_err(uc->dev, "failed to get FW build information\n");
 
 	/* reset ccg device and initialize ucsi */
@@ -1426,6 +1438,12 @@ static void ucsi_ccg_remove(struct i2c_client *client)
 	free_irq(uc->irq, uc);
 }
 
+static const struct of_device_id ucsi_ccg_of_match_table[] = {
+		{ .compatible = "cypress,cypd4226", },
+		{ /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, ucsi_ccg_of_match_table);
+
 static const struct i2c_device_id ucsi_ccg_device_id[] = {
 	{"ccgx-ucsi", 0},
 	{}
@@ -1480,6 +1498,7 @@ static struct i2c_driver ucsi_ccg_driver = {
 		.pm = &ucsi_ccg_pm,
 		.dev_groups = ucsi_ccg_groups,
 		.acpi_match_table = amd_i2c_ucsi_match,
++		.of_match_table = ucsi_ccg_of_match_table,
 	},
 	.probe_new = ucsi_ccg_probe,
 	.remove = ucsi_ccg_remove,
-- 
2.25.1