Hello Marek,
Am 07.02.2020 um 16:57 schrieb Marek Vasut:
Add deblock dequence for the I2C bus, needed on some devices. This sequence is issued once, when probing the driver, and is controlled by DT property, "i2c-gpio,deblock".
Signed-off-by: Marek Vasut marex@denx.de
drivers/i2c/i2c-gpio.c | 15 +++++++++++++++ 1 file changed, 15 insertions(+)
Nitpick: I see no entry in doc/device-tree-bindings/i2c/i2c-gpio.txt for the new dts binding ... please send a follow up patch which adds it, or a v2 for this one, thanks!
Reviewed-by: Heiko Schocher hs@denx.de
bye, Heiko
diff --git a/drivers/i2c/i2c-gpio.c b/drivers/i2c/i2c-gpio.c index 4e8fa21473..b6b6ba9ee8 100644 --- a/drivers/i2c/i2c-gpio.c +++ b/drivers/i2c/i2c-gpio.c @@ -305,6 +305,20 @@ static int i2c_gpio_set_bus_speed(struct udevice *dev, unsigned int speed_hz) return 0; }
+static int i2c_gpio_drv_probe(struct udevice *dev) +{
- if (dev_read_bool(dev, "i2c-gpio,deblock")) {
/* @200kHz 9 clocks = 44us, 62us is ok */const unsigned int DELAY_ABORT_SEQ = 62;struct i2c_gpio_bus *bus = dev_get_priv(dev);return i2c_deblock_gpio_loop(&bus->gpios[PIN_SDA],&bus->gpios[PIN_SCL],16, 5, DELAY_ABORT_SEQ);- }
- return 0;
+}
- static int i2c_gpio_ofdata_to_platdata(struct udevice *dev) { struct i2c_gpio_bus *bus = dev_get_priv(dev);
@@ -341,6 +355,7 @@ U_BOOT_DRIVER(i2c_gpio) = { .name = "i2c-gpio", .id = UCLASS_I2C, .of_match = i2c_gpio_ids,
- .probe = i2c_gpio_drv_probe, .ofdata_to_platdata = i2c_gpio_ofdata_to_platdata, .priv_auto_alloc_size = sizeof(struct i2c_gpio_bus), .ops = &i2c_gpio_ops,