Hello Michal,
Am 27.05.2019 um 13:34 schrieb Michal Simek:
On 27. 05. 19 12:49, Heiko Schocher wrote:
add gpio-hog support. GPIO hogging is a mechanism
providing automatic GPIO request and configuration
as part of the gpio-controller's driver probe function.
for more infos see:
doc/device-tree-bindings/gpio/gpio.txt
Signed-off-by: Heiko Schocher <h...@denx.de>
---
not yet started clean travis build, see result:
https://travis-ci.org/hsdenx/u-boot-test/builds/537732421
Changes in v2:
- move gpio_hog() call from post_probe() to post_bind()
call. Check if current gpio device has gpio-hog
definitions, if so, probe it.
I am using i2c to gpio chip and with v2 this chip is not listed via dm
completely. It means something is wrong for sure.
What do you mean with "this chip is not listed via dm completely" ?
It looks like that parent is not probed that's why it is failing.
I use this on the aristainetos board, work currently on rework for DM/DT
usage in U-Boot, dts not yet in u-boot but in linux, see:
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/arch/arm/boot/dts/imx6qdl-aristainetos2.dtsi#n286
and added for u-boot now gpio hog definitons:
&i2c3 {
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_i2c3>;
status = "okay";
expander: tca6416@20 {
compatible = "ti,tca6416";
reg = <0x20>;
#gpio-cells = <2>;
gpio-controller;
env_reset {
gpio-hog;
input;
gpios = <6 GPIO_ACTIVE_LOW>;
};
boot_rescue {
gpio-hog;
input;
gpios = <7 GPIO_ACTIVE_LOW>;
};
};
};
works fine for me ...
=> dm tree
Class Index Probed Driver Name
-----------------------------------------------------------
root 0 [ + ] root_driver root_driver
[...]
i2c 2 [ + ] i2c_mxc | | |-- i2c@21a8000
gpio 7 [ + ] pca953x | | | |-- tca6416@20
=> gpio status
[...]
Bank gpio@20_:
gpio@20_6: input: 0 [x] env_reset.gpio-hog
gpio@20_7: input: 1 [x] boot_rescue.gpio-hog
=>
Hmm.. how can I reproduce your problem?
bye,
Heiko
--
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