| Message ID | 20200207155752.40930-4-marex@denx.de |
|---|---|
| State | Accepted |
| Commit | 4368c6a2bc6b37f8a547a566da0ad4060f578195 |
| Headers | show |
| Series | [1/4] i2c: Make deblock delay and SCL clock configurable | expand |
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 at 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 at 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, >
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 at 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
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 at denx.de> > --- > drivers/i2c/i2c-gpio.c | 15 +++++++++++++++ > 1 file changed, 15 insertions(+) Applied to u-boot-i2c next, thanks! 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,
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 at denx.de> --- drivers/i2c/i2c-gpio.c | 15 +++++++++++++++ 1 file changed, 15 insertions(+)