Hi,
I create this patchset to prepare alignment of stm32mp157c-ev1 device-tree with the linux kernel v5.4.
One node for touch screen support use the IRQ line configuration using the new kernel binding introduced by the linux kernel commit ede033e1e863c from v5.1 ('dt-bindings: gpio: document the new pull-up/pull-down flags') https://github.com/torvalds/linux/commit/ede033e1e863c
gt9147: goodix_ts@5d { compatible = "goodix,gt9147"; reg = <0x5d>; status = "okay"; irq-gpios = <&stmfx_pinctrl 14 (GPIO_ACTIVE_HIGH | GPIO_PULL_DOWN)>; irq-flags = <IRQ_TYPE_EDGE_RISING>; };
In Linux Kernel, the GPIO configuration (pull down/up) are now managed by GPIO lib but they are not yet supported by U-boot in uclass GPIO or pincontrol (when used by gpio-hog).
This serie adds the support of theses new defines (with ops get_config/set_config) added in kernel GPIO binding and adds the test in sandbox.
NB: In a second phase, the removed set_open_drain/get_open_drain API could be replaced by the new ops get_config/set_config.
I also align the gpio binding file with the version from the latest kernel v5.3 (I don't think I remove any U-Boot specific part with this patch) I move the added information on gpio hog code in a new file doc/README.gpio.
To have functional test, I convert pinctrl-generic to livetree otherwise the pins are not correctly configured in sandbox, when CONFIG_OF_LIVE is activated.
For the test on gpio I add information for pin configuration in output of the command "pinmux status" with a simple pincontrol driver associated to GPIO driver.
NB: after rebase on master branch, the sandbox test "ut dm power_domain" is failing; it was not the case for v2019.10.
=> ut dm power_domain Test: dm_test_power_domain: power-domain.c ../test/dm/test-main.c:73, dm_test_destroy(): 0 == uclass_destroy(uc): Expected 0, got -22 ../test/dm/test-main.c:108, dm_do_test(): 0 == dm_test_destroy(uts): Expected 0, got 1 ../test/dm/test-main.c:170, dm_test_main(): 0 == dm_do_test(uts, test, 1): Expected 0, got 1
I think it is linked to commit 52edfed65de9 ("dm: core: device: switch off power domain after device removal")
After some investigation :
1/ pincontrol is remove in uclass_destroy(0)
2/ power domain is removed in uclass_destroy(0)
3/ device_chld_unbind() dev_power_domain_off -> probe power domain (again) --> pinctrl_select_state() in device_probe() ---> pincontrol is probed (again)
4/ at the end of dev_power_domain_off() function the power domain is unbind in dev_power_domain_off device_remove(pd.dev, DM_REMOVE_NORMAL);
So power domain driver is correctly removed but it is not the case for the pincontrol driver and that cause the issue.
The problem occurs after my serie only because I introduce a second pincontrol driver for sandbox, so the dynamic changes but my serie is not the root cause of the issue, it should be investigated by power domain users.
Workaround to allow test execution: "dm: core: device: don't probe pinctrl for power domain"
My working branch: https://github.com/patrickdelaunay/u-boot/tree/dm
CI-Travis build: https://travis-ci.org/patrickdelaunay/u-boot/builds/616716294
Issue for tbs2910 board not reproduced locally with buildman +u-boot.imx exceeds file size limit: 1405+ limit: 0x5fc00 bytes 1406+ actual: 0x60c00 bytes 1407+ excess: 0x1000 bytes
Regards
Patrick Delaunay
Changes in v2: - use the dev_ API instead of ofnode_ function. - Identify property with a new struct ofprop as proposed by Simon Glass - Add dev_ iterate functions - Change dev_ functions in pinctrl-generic - remove the unused GPIOD_REQUESTED - remove the open_drain API and ops - add gpio descriptor initialization helper - change the proposed ops for pin config to set_dir_flags/get_dir_flags - reused the existing API dm_gpio_set_dir_flags/dm_gpio_set_dir - add a new API dm_gpio_get_dir_flags - simplify sandbox GPIO driver: save dir_flags (GPIOD_...) and remove internal flags (GPIOF_...); the previous path "gpio: sandbox: cleanup flag support" is no more needed - add unitary test in dm_test_gpio for set_dir_flags - add some function check in dm_test_gpio_phandles - dm_test_gpio_pin_config change to dm_test_gpio_get_dir_flags - Adapt sandbox_pinctrl_gpio driver with the saved dir_flags in sandbox gpio driver - rebase on v2020.01-rc3
Patrick Delaunay (14): dm: pinctrl: convert pinctrl-single to livetree dm: core: add ofnode and dev function to iterate on node property dm: pinctrl: migrate pinctrl-generic to livetree dt-bindings: gpio: document the new pull-up/pull-down flags gpio: remove GPIOD_REQUESTED gpio: remove the open_drain API and ops gpio: add gpio descriptor initialization helper gpio: add ops for configuration with dir flags dt-bindings: gpio: alignment with kernel v5.3 pinctrl: sandbox: Add mux information in get_pin_muxing test: dm: update test for pins configuration in pinctrl node gpio: sandbox: cleanup binding support test: dm: update test for pins configuration in gpio test: pinmux: add pincontrol-gpio for pin configuration
arch/sandbox/dts/test.dts | 85 +++++-- arch/sandbox/include/asm/gpio.h | 38 +-- doc/README.gpio | 42 ++++ doc/device-tree-bindings/gpio/gpio.txt | 304 ++++++++++++---------- drivers/core/of_access.c | 32 +++ drivers/core/ofnode.c | 48 ++++ drivers/core/read.c | 16 ++ drivers/gpio/gpio-uclass.c | 192 ++++++++++---- drivers/gpio/mpc8xxx_gpio.c | 22 -- drivers/gpio/sandbox.c | 321 +++++++++++++++++++----- drivers/pinctrl/pinctrl-generic.c | 30 +-- drivers/pinctrl/pinctrl-sandbox.c | 44 +++- drivers/pinctrl/pinctrl-single.c | 27 +- include/asm-generic/gpio.h | 104 ++++---- include/dm/of_access.h | 40 +++ include/dm/ofnode.h | 63 ++++- include/dm/read.h | 67 +++++ include/dt-bindings/gpio/gpio.h | 6 + include/dt-bindings/gpio/sandbox-gpio.h | 24 ++ test/dm/gpio.c | 69 ++++- test/dm/test-fdt.c | 2 +- test/py/tests/test_pinmux.py | 38 ++- 22 files changed, 1216 insertions(+), 398 deletions(-) create mode 100644 doc/README.gpio create mode 100644 include/dt-bindings/gpio/sandbox-gpio.h