[PATCH v7 1/6] i2c: xiic: skip input clock setup on non-OF systems

[Abdurrahman Hussain via B4 Relay]

From: Abdurrahman Hussain <abdurrahman at nexthop.ai>

The xiic driver supports operation without explicit clock configuration
when clocks cannot be specified via firmware, such as on ACPI-based
systems. This behavior is implemented in xiic_setclk(), which returns
early when either i2c_clk or input_clk are zero.

Signed-off-by: Abdurrahman Hussain <abdurrahman at nexthop.ai>
---
 drivers/i2c/busses/i2c-xiic.c | 11 +++++++----
 1 file changed, 7 insertions(+), 4 deletions(-)

diff --git a/drivers/i2c/busses/i2c-xiic.c b/drivers/i2c/busses/i2c-xiic.c
index 28015d77599d..912a94d4d080 100644
--- a/drivers/i2c/busses/i2c-xiic.c
+++ b/drivers/i2c/busses/i2c-xiic.c
@@ -1423,6 +1423,7 @@ MODULE_DEVICE_TABLE(of, xiic_of_match);
 
 static int xiic_i2c_probe(struct platform_device *pdev)
 {
+	struct device *dev = &pdev->dev;
 	struct xiic_i2c *i2c;
 	struct xiic_i2c_platform_data *pdata;
 	const struct of_device_id *match;
@@ -1464,10 +1465,12 @@ static int xiic_i2c_probe(struct platform_device *pdev)
 	mutex_init(&i2c->lock);
 	spin_lock_init(&i2c->atomic_lock);
 
-	i2c->clk = devm_clk_get_enabled(&pdev->dev, NULL);
-	if (IS_ERR(i2c->clk))
-		return dev_err_probe(&pdev->dev, PTR_ERR(i2c->clk),
-				     "failed to enable input clock.\n");
+	if (is_of_node(dev->fwnode)) {
+		i2c->clk = devm_clk_get_enabled(dev, NULL);
+		if (IS_ERR(i2c->clk))
+			return dev_err_probe(&pdev->dev, PTR_ERR(i2c->clk),
+					"failed to enable input clock.\n");
+	}
 
 	i2c->dev = &pdev->dev;
 	pm_runtime_set_autosuspend_delay(i2c->dev, XIIC_PM_TIMEOUT);

-- 
2.52.0