[PATCH v14 2/2] HID: cp2112: Configure I2C bus speed from firmware

From: Danny Kaehn

Date: Wed May 20 2026 - 13:20:43 EST


Now that the I2C adapter on the CP2112 can have an associated firmware
node, set the bus speed based on firmware configuration

Reviewed-by: Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx>
Signed-off-by: Danny Kaehn <danny.kaehn@xxxxxxxxxx>
---
drivers/hid/hid-cp2112.c | 4 ++++
1 file changed, 4 insertions(+)

diff --git a/drivers/hid/hid-cp2112.c b/drivers/hid/hid-cp2112.c
index e960fc988058..04379db93571 100644
--- a/drivers/hid/hid-cp2112.c
+++ b/drivers/hid/hid-cp2112.c
@@ -1223,6 +1223,7 @@ static int cp2112_probe(struct hid_device *hdev, const struct hid_device_id *id)
struct fwnode_handle *cp2112_fwnode;
struct fwnode_handle *child;
struct gpio_irq_chip *girq;
+ struct i2c_timings timings;
u32 addr;
int ret;

@@ -1308,6 +1309,9 @@ static int cp2112_probe(struct hid_device *hdev, const struct hid_device_id *id)
goto err_power_normal;
}

+ i2c_parse_fw_timings(&dev->adap.dev, &timings, true);
+
+ config.clock_speed = cpu_to_be32(timings.bus_freq_hz);
config.retry_time = cpu_to_be16(1);

ret = cp2112_hid_output(hdev, (u8 *)&config, sizeof(config),

--
2.25.1