[PATCH 1/4] i2c: Make deblock delay and SCL clock configurable

[PATCH 1/4] i2c: Make deblock delay and SCL clock configurable

[Marek Vasut]

Make the delay between SCL line changes and the number of SCL clock
changes configurable as a parameter of the deblock function. No
functional change.

Signed-off-by: Marek Vasut <marex@denx.de>
---
 drivers/i2c/i2c-uclass.c | 21 +++++++++++----------
 1 file changed, 11 insertions(+), 10 deletions(-)

diff --git a/drivers/i2c/i2c-uclass.c b/drivers/i2c/i2c-uclass.c
index 2aa3efe8aa..25af1fabdb 100644
--- a/drivers/i2c/i2c-uclass.c
+++ b/drivers/i2c/i2c-uclass.c
@@ -502,34 +502,35 @@ static int i2c_gpio_get_pin(struct gpio_desc *pin)
 }
 
 static int i2c_deblock_gpio_loop(struct gpio_desc *sda_pin,
-				 struct gpio_desc *scl_pin)
+				 struct gpio_desc *scl_pin,
+				 unsigned int scl_count,
+				 unsigned int delay)
 {
-	int counter = 9;
 	int ret = 0;
 
 	i2c_gpio_set_pin(sda_pin, 1);
 	i2c_gpio_set_pin(scl_pin, 1);
-	udelay(5);
+	udelay(delay);
 
 	/*  Toggle SCL until slave release SDA */
-	while (counter-- >= 0) {
+	while (scl_count-- >= 0) {
 		i2c_gpio_set_pin(scl_pin, 1);
-		udelay(5);
+		udelay(delay);
 		i2c_gpio_set_pin(scl_pin, 0);
-		udelay(5);
+		udelay(delay);
 		if (i2c_gpio_get_pin(sda_pin))
 			break;
 	}
 
 	/* Then, send I2C stop */
 	i2c_gpio_set_pin(sda_pin, 0);
-	udelay(5);
+	udelay(delay);
 
 	i2c_gpio_set_pin(scl_pin, 1);
-	udelay(5);
+	udelay(delay);
 
 	i2c_gpio_set_pin(sda_pin, 1);
-	udelay(5);
+	udelay(delay);
 
 	if (!i2c_gpio_get_pin(sda_pin) || !i2c_gpio_get_pin(scl_pin))
 		ret = -EREMOTEIO;
@@ -561,7 +562,7 @@ static int i2c_deblock_gpio(struct udevice *bus)
 		goto out_no_pinctrl;
 	}
 
-	ret0 = i2c_deblock_gpio_loop(&gpios[PIN_SDA], &gpios[PIN_SCL]);
+	ret0 = i2c_deblock_gpio_loop(&gpios[PIN_SDA], &gpios[PIN_SCL], 9, 5);
 
 	ret = pinctrl_select_state(bus, "default");
 	if (ret) {
-- 
2.24.1

[PATCH 2/4] i2c: Export i2c_deblock_gpio_loop()

[Marek Vasut]

Export the i2c_deblock_gpio_loop() so it can be used in other places in
U-Boot. In particular, this is useful in the GPIO I2C driver, which claims
the SDA/SCL GPIOs and thus prevents the i2c_deblock() implementation from
claiming the pins as GPIOs again.

Signed-off-by: Marek Vasut <marex@denx.de>
---
 drivers/i2c/i2c-uclass.c |  8 ++++----
 include/i2c.h            | 16 ++++++++++++++++
 2 files changed, 20 insertions(+), 4 deletions(-)

diff --git a/drivers/i2c/i2c-uclass.c b/drivers/i2c/i2c-uclass.c
index 25af1fabdb..86f529241f 100644
--- a/drivers/i2c/i2c-uclass.c
+++ b/drivers/i2c/i2c-uclass.c
@@ -501,10 +501,10 @@ static int i2c_gpio_get_pin(struct gpio_desc *pin)
 	return dm_gpio_get_value(pin);
 }
 
-static int i2c_deblock_gpio_loop(struct gpio_desc *sda_pin,
-				 struct gpio_desc *scl_pin,
-				 unsigned int scl_count,
-				 unsigned int delay)
+int i2c_deblock_gpio_loop(struct gpio_desc *sda_pin,
+			  struct gpio_desc *scl_pin,
+			  unsigned int scl_count,
+			  unsigned int delay)
 {
 	int ret = 0;
 
diff --git a/include/i2c.h b/include/i2c.h
index 0faf8542e2..7c92042c58 100644
--- a/include/i2c.h
+++ b/include/i2c.h
@@ -330,6 +330,22 @@ uint i2c_get_chip_addr_offset_mask(struct udevice *dev);
  */
 int i2c_deblock(struct udevice *bus);
 
+/**
+ * i2c_deblock_gpio_loop() - recover a bus from an unknown state by toggling SDA/SCL
+ *
+ * This is the inner logic used for toggling I2C SDA/SCL lines as GPIOs
+ * for deblocking the I2C bus.
+ *
+ * @sda_pin:	SDA GPIO
+ * @scl_pin:	SCL GPIO
+ * @scl_count:	Number of SCL clock cycles generated to deblock SDA
+ * @delay:	Delay between SCL clock line changes
+ * @return 0 if OK, -ve on error
+ */
+struct gpio_desc;
+int i2c_deblock_gpio_loop(struct gpio_desc *sda_pin, struct gpio_desc *scl_pin,
+			  unsigned int scl_count, unsigned int delay);
+
 /**
  * struct dm_i2c_ops - driver operations for I2C uclass
  *
-- 
2.24.1

[PATCH 3/4] i2c: Add option to send start condition after deblocking

[Marek Vasut]

Add option to send start condition after deblocking SDA.

Signed-off-by: Marek Vasut <marex@denx.de>
---
 drivers/i2c/i2c-uclass.c | 23 ++++++++++++++++++++---
 include/i2c.h            |  4 +++-
 2 files changed, 23 insertions(+), 4 deletions(-)

diff --git a/drivers/i2c/i2c-uclass.c b/drivers/i2c/i2c-uclass.c
index 86f529241f..e9ec388576 100644
--- a/drivers/i2c/i2c-uclass.c
+++ b/drivers/i2c/i2c-uclass.c
@@ -504,9 +504,10 @@ static int i2c_gpio_get_pin(struct gpio_desc *pin)
 int i2c_deblock_gpio_loop(struct gpio_desc *sda_pin,
 			  struct gpio_desc *scl_pin,
 			  unsigned int scl_count,
+			  unsigned int start_count,
 			  unsigned int delay)
 {
-	int ret = 0;
+	int i, ret = -EREMOTEIO;
 
 	i2c_gpio_set_pin(sda_pin, 1);
 	i2c_gpio_set_pin(scl_pin, 1);
@@ -518,8 +519,24 @@ int i2c_deblock_gpio_loop(struct gpio_desc *sda_pin,
 		udelay(delay);
 		i2c_gpio_set_pin(scl_pin, 0);
 		udelay(delay);
-		if (i2c_gpio_get_pin(sda_pin))
+		if (i2c_gpio_get_pin(sda_pin)) {
+			ret = 0;
 			break;
+		}
+	}
+
+	if (!ret && start_count) {
+		for (i = 0; i < start_count; i++) {
+			/* Send start condition */
+			udelay(delay);
+			i2c_gpio_set_pin(sda_pin, 1);
+			udelay(delay);
+			i2c_gpio_set_pin(scl_pin, 1);
+			udelay(delay);
+			i2c_gpio_set_pin(sda_pin, 0);
+			udelay(delay);
+			i2c_gpio_set_pin(scl_pin, 0);
+		}
 	}
 
 	/* Then, send I2C stop */
@@ -562,7 +579,7 @@ static int i2c_deblock_gpio(struct udevice *bus)
 		goto out_no_pinctrl;
 	}
 
-	ret0 = i2c_deblock_gpio_loop(&gpios[PIN_SDA], &gpios[PIN_SCL], 9, 5);
+	ret0 = i2c_deblock_gpio_loop(&gpios[PIN_SDA], &gpios[PIN_SCL], 9, 0, 5);
 
 	ret = pinctrl_select_state(bus, "default");
 	if (ret) {
diff --git a/include/i2c.h b/include/i2c.h
index 7c92042c58..059200115a 100644
--- a/include/i2c.h
+++ b/include/i2c.h
@@ -339,12 +339,14 @@ int i2c_deblock(struct udevice *bus);
  * @sda_pin:	SDA GPIO
  * @scl_pin:	SCL GPIO
  * @scl_count:	Number of SCL clock cycles generated to deblock SDA
+ * @start_count:Number of I2C start conditions sent after deblocking SDA
  * @delay:	Delay between SCL clock line changes
  * @return 0 if OK, -ve on error
  */
 struct gpio_desc;
 int i2c_deblock_gpio_loop(struct gpio_desc *sda_pin, struct gpio_desc *scl_pin,
-			  unsigned int scl_count, unsigned int delay);
+			  unsigned int scl_count, unsigned int start_count,
+			  unsigned int delay);
 
 /**
  * struct dm_i2c_ops - driver operations for I2C uclass
-- 
2.24.1

[PATCH 4/4] i2c: gpio: Run deblock sequence on probe

[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(+)

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,
-- 
2.24.1

[PATCH 1/4] i2c: Make deblock delay and SCL clock configurable

[Heiko Schocher]

Hello Marek,

Am 07.02.2020 um 16:57 schrieb Marek Vasut:
> Make the delay between SCL line changes and the number of SCL clock
> changes configurable as a parameter of the deblock function. No
> functional change.
> 
> Signed-off-by: Marek Vasut <marex@denx.de>
> ---
>   drivers/i2c/i2c-uclass.c | 21 +++++++++++----------
>   1 file changed, 11 insertions(+), 10 deletions(-)

Reviewed-by: Heiko Schocher <hs@denx.de>

bye,
Heiko
-- 
DENX Software Engineering GmbH,      Managing Director: Wolfgang Denk
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: +49-8142-66989-52   Fax: +49-8142-66989-80   Email: hs at denx.de

[PATCH 2/4] i2c: Export i2c_deblock_gpio_loop()

[Heiko Schocher]

Hello Marek,

Am 07.02.2020 um 16:57 schrieb Marek Vasut:
> Export the i2c_deblock_gpio_loop() so it can be used in other places in
> U-Boot. In particular, this is useful in the GPIO I2C driver, which claims
> the SDA/SCL GPIOs and thus prevents the i2c_deblock() implementation from
> claiming the pins as GPIOs again.
> 
> Signed-off-by: Marek Vasut <marex@denx.de>
> ---
>   drivers/i2c/i2c-uclass.c |  8 ++++----
>   include/i2c.h            | 16 ++++++++++++++++
>   2 files changed, 20 insertions(+), 4 deletions(-)

Reviewed-by: Heiko Schocher <hs@denx.de>

bye,
Heiko
-- 
DENX Software Engineering GmbH,      Managing Director: Wolfgang Denk
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: +49-8142-66989-52   Fax: +49-8142-66989-80   Email: hs at denx.de

[PATCH 3/4] i2c: Add option to send start condition after deblocking

[Heiko Schocher]

Hello Marek,

Am 07.02.2020 um 16:57 schrieb Marek Vasut:
> Add option to send start condition after deblocking SDA.
> 
> Signed-off-by: Marek Vasut <marex@denx.de>
> ---
>   drivers/i2c/i2c-uclass.c | 23 ++++++++++++++++++++---
>   include/i2c.h            |  4 +++-
>   2 files changed, 23 insertions(+), 4 deletions(-)

Reviewed-by: Heiko Schocher <hs@denx.de>

> diff --git a/drivers/i2c/i2c-uclass.c b/drivers/i2c/i2c-uclass.c
> index 86f529241f..e9ec388576 100644
> --- a/drivers/i2c/i2c-uclass.c
> +++ b/drivers/i2c/i2c-uclass.c
> @@ -504,9 +504,10 @@ static int i2c_gpio_get_pin(struct gpio_desc *pin)
>   int i2c_deblock_gpio_loop(struct gpio_desc *sda_pin,
>   			  struct gpio_desc *scl_pin,
>   			  unsigned int scl_count,
> +			  unsigned int start_count,
>   			  unsigned int delay)
>   {
> -	int ret = 0;
> +	int i, ret = -EREMOTEIO;
>   
>   	i2c_gpio_set_pin(sda_pin, 1);
>   	i2c_gpio_set_pin(scl_pin, 1);
> @@ -518,8 +519,24 @@ int i2c_deblock_gpio_loop(struct gpio_desc *sda_pin,
>   		udelay(delay);
>   		i2c_gpio_set_pin(scl_pin, 0);
>   		udelay(delay);
> -		if (i2c_gpio_get_pin(sda_pin))
> +		if (i2c_gpio_get_pin(sda_pin)) {
> +			ret = 0;
>   			break;
> +		}
> +	}
> +
> +	if (!ret && start_count) {
> +		for (i = 0; i < start_count; i++) {
> +			/* Send start condition */
> +			udelay(delay);
> +			i2c_gpio_set_pin(sda_pin, 1);
> +			udelay(delay);
> +			i2c_gpio_set_pin(scl_pin, 1);
> +			udelay(delay);
> +			i2c_gpio_set_pin(sda_pin, 0);
> +			udelay(delay);
> +			i2c_gpio_set_pin(scl_pin, 0);
> +		}
>   	}
>   
>   	/* Then, send I2C stop */
> @@ -562,7 +579,7 @@ static int i2c_deblock_gpio(struct udevice *bus)
>   		goto out_no_pinctrl;
>   	}
>   
> -	ret0 = i2c_deblock_gpio_loop(&gpios[PIN_SDA], &gpios[PIN_SCL], 9, 5);
> +	ret0 = i2c_deblock_gpio_loop(&gpios[PIN_SDA], &gpios[PIN_SCL], 9, 0, 5);
>   
>   	ret = pinctrl_select_state(bus, "default");
>   	if (ret) {
> diff --git a/include/i2c.h b/include/i2c.h
> index 7c92042c58..059200115a 100644
> --- a/include/i2c.h
> +++ b/include/i2c.h
> @@ -339,12 +339,14 @@ int i2c_deblock(struct udevice *bus);
>    * @sda_pin:	SDA GPIO
>    * @scl_pin:	SCL GPIO
>    * @scl_count:	Number of SCL clock cycles generated to deblock SDA
> + * @start_count:Number of I2C start conditions sent after deblocking SDA

Is there a tab missing? If so I can add it, when applying this patch.

>    * @delay:	Delay between SCL clock line changes
>    * @return 0 if OK, -ve on error
>    */
>   struct gpio_desc;
>   int i2c_deblock_gpio_loop(struct gpio_desc *sda_pin, struct gpio_desc *scl_pin,
> -			  unsigned int scl_count, unsigned int delay);
> +			  unsigned int scl_count, unsigned int start_count,
> +			  unsigned int delay);
>   
>   /**
>    * struct dm_i2c_ops - driver operations for I2C uclass
> 

bye,
Heiko
-- 
DENX Software Engineering GmbH,      Managing Director: Wolfgang Denk
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: +49-8142-66989-52   Fax: +49-8142-66989-80   Email: hs at denx.de

[PATCH 4/4] i2c: gpio: Run deblock sequence on probe

[Heiko Schocher]

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,
> 

-- 
DENX Software Engineering GmbH,      Managing Director: Wolfgang Denk
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: +49-8142-66989-52   Fax: +49-8142-66989-80   Email: hs at denx.de

[PATCH 3/4] i2c: Add option to send start condition after deblocking

[Marek Vasut]

On 2/18/20 8:07 AM, Heiko Schocher wrote:
> Hello Marek,

Hi,

> Am 07.02.2020 um 16:57 schrieb Marek Vasut:
>> Add option to send start condition after deblocking SDA.
>>
>> Signed-off-by: Marek Vasut <marex@denx.de>
>> ---
>> ? drivers/i2c/i2c-uclass.c | 23 ++++++++++++++++++++---
>> ? include/i2c.h??????????? |? 4 +++-
>> ? 2 files changed, 23 insertions(+), 4 deletions(-)
> 
> Reviewed-by: Heiko Schocher <hs@denx.de>
> 
>> diff --git a/drivers/i2c/i2c-uclass.c b/drivers/i2c/i2c-uclass.c
>> index 86f529241f..e9ec388576 100644
>> --- a/drivers/i2c/i2c-uclass.c
>> +++ b/drivers/i2c/i2c-uclass.c
>> @@ -504,9 +504,10 @@ static int i2c_gpio_get_pin(struct gpio_desc *pin)
>> ? int i2c_deblock_gpio_loop(struct gpio_desc *sda_pin,
>> ??????????????? struct gpio_desc *scl_pin,
>> ??????????????? unsigned int scl_count,
>> +????????????? unsigned int start_count,
>> ??????????????? unsigned int delay)
>> ? {
>> -??? int ret = 0;
>> +??? int i, ret = -EREMOTEIO;
>> ? ????? i2c_gpio_set_pin(sda_pin, 1);
>> ????? i2c_gpio_set_pin(scl_pin, 1);
>> @@ -518,8 +519,24 @@ int i2c_deblock_gpio_loop(struct gpio_desc *sda_pin,
>> ????????? udelay(delay);
>> ????????? i2c_gpio_set_pin(scl_pin, 0);
>> ????????? udelay(delay);
>> -??????? if (i2c_gpio_get_pin(sda_pin))
>> +??????? if (i2c_gpio_get_pin(sda_pin)) {
>> +??????????? ret = 0;
>> ????????????? break;
>> +??????? }
>> +??? }
>> +
>> +??? if (!ret && start_count) {
>> +??????? for (i = 0; i < start_count; i++) {
>> +??????????? /* Send start condition */
>> +??????????? udelay(delay);
>> +??????????? i2c_gpio_set_pin(sda_pin, 1);
>> +??????????? udelay(delay);
>> +??????????? i2c_gpio_set_pin(scl_pin, 1);
>> +??????????? udelay(delay);
>> +??????????? i2c_gpio_set_pin(sda_pin, 0);
>> +??????????? udelay(delay);
>> +??????????? i2c_gpio_set_pin(scl_pin, 0);
>> +??????? }
>> ????? }
>> ? ????? /* Then, send I2C stop */
>> @@ -562,7 +579,7 @@ static int i2c_deblock_gpio(struct udevice *bus)
>> ????????? goto out_no_pinctrl;
>> ????? }
>> ? -??? ret0 = i2c_deblock_gpio_loop(&gpios[PIN_SDA], &gpios[PIN_SCL],
>> 9, 5);
>> +??? ret0 = i2c_deblock_gpio_loop(&gpios[PIN_SDA], &gpios[PIN_SCL], 9,
>> 0, 5);
>> ? ????? ret = pinctrl_select_state(bus, "default");
>> ????? if (ret) {
>> diff --git a/include/i2c.h b/include/i2c.h
>> index 7c92042c58..059200115a 100644
>> --- a/include/i2c.h
>> +++ b/include/i2c.h
>> @@ -339,12 +339,14 @@ int i2c_deblock(struct udevice *bus);
>> ?? * @sda_pin:??? SDA GPIO
>> ?? * @scl_pin:??? SCL GPIO
>> ?? * @scl_count:??? Number of SCL clock cycles generated to deblock SDA
>> + * @start_count:Number of I2C start conditions sent after deblocking SDA
> 
> Is there a tab missing? If so I can add it, when applying this patch.

Nope, if you add tab, the formatting starts to look real awful.
You can add a space if you feel very inclined to do so, but it would
still look ugly.

[PATCH 4/4] i2c: gpio: Run deblock sequence on probe

[Marek Vasut]

On 2/18/20 8:11 AM, Heiko Schocher wrote:
> 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!

Done in
[PATCH] doc: i2c: gpio: Document deblock sequence on probe

[PATCH 1/4] i2c: Make deblock delay and SCL clock configurable

[Heiko Schocher]

Hello Marek,

Am 07.02.2020 um 16:57 schrieb Marek Vasut:
> Make the delay between SCL line changes and the number of SCL clock
> changes configurable as a parameter of the deblock function. No
> functional change.
> 
> Signed-off-by: Marek Vasut <marex@denx.de>
> ---
>   drivers/i2c/i2c-uclass.c | 21 +++++++++++----------
>   1 file changed, 11 insertions(+), 10 deletions(-)

Applied to u-boot-i2c next, thanks!

bye,
Heiko
-- 
DENX Software Engineering GmbH,      Managing Director: Wolfgang Denk
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: +49-8142-66989-52   Fax: +49-8142-66989-80   Email: hs at denx.de

[PATCH 2/4] i2c: Export i2c_deblock_gpio_loop()

[Heiko Schocher]

Hello Marek,

Am 07.02.2020 um 16:57 schrieb Marek Vasut:
> Export the i2c_deblock_gpio_loop() so it can be used in other places in
> U-Boot. In particular, this is useful in the GPIO I2C driver, which claims
> the SDA/SCL GPIOs and thus prevents the i2c_deblock() implementation from
> claiming the pins as GPIOs again.
> 
> Signed-off-by: Marek Vasut <marex@denx.de>
> ---
>   drivers/i2c/i2c-uclass.c |  8 ++++----
>   include/i2c.h            | 16 ++++++++++++++++
>   2 files changed, 20 insertions(+), 4 deletions(-)

Applied to u-boot-i2c next, thanks!

bye,
Heiko
-- 
DENX Software Engineering GmbH,      Managing Director: Wolfgang Denk
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: +49-8142-66989-52   Fax: +49-8142-66989-80   Email: hs at denx.de

[PATCH 3/4] i2c: Add option to send start condition after deblocking

[Heiko Schocher]

Hello Marek,

Am 07.02.2020 um 16:57 schrieb Marek Vasut:
> Add option to send start condition after deblocking SDA.
> 
> Signed-off-by: Marek Vasut <marex@denx.de>
> ---
>   drivers/i2c/i2c-uclass.c | 23 ++++++++++++++++++++---
>   include/i2c.h            |  4 +++-
>   2 files changed, 23 insertions(+), 4 deletions(-)

Applied to u-boot-i2c next, thanks!

bye,
Heiko
-- 
DENX Software Engineering GmbH,      Managing Director: Wolfgang Denk
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: +49-8142-66989-52   Fax: +49-8142-66989-80   Email: hs at denx.de

[PATCH 4/4] i2c: gpio: Run deblock sequence on probe

[Heiko Schocher]

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(+)

Applied to u-boot-i2c next, thanks!

bye,
Heiko
-- 
DENX Software Engineering GmbH,      Managing Director: Wolfgang Denk
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: +49-8142-66989-52   Fax: +49-8142-66989-80   Email: hs at denx.de