[PATCH v3 1/2] sandbox, test: add test for GPIO_HOG function

[Heiko Schocher]

Hello Tom, Patrick,

Am 27.04.2020 um 08:47 schrieb Heiko Schocher:
> Hello Tom, Patrick,
> 
> Am 27.04.2020 um 07:16 schrieb Heiko Schocher:
>> Hello Tom,
>>
>> Am 24.04.2020 um 19:45 schrieb Tom Rini:
>>> On Wed, Feb 05, 2020 at 07:19:58AM +0100, Heiko Schocher wrote:
>>>
>>>> currently gpio hog function is not tested with "ut dm gpio"
>>>> so add some basic tests for gpio hog functionality.
>>>>
>>>> For this enable GPIO_HOG in sandbox_defconfig, add
>>>> in DTS some gpio hog entries, and add testcase in
>>>> "ut dm gpio" command.
>>>>
>>>> Signed-off-by: Heiko Schocher <hs at denx.de>
>>>> Reviewed-by: Simon Glass <sjg at chromium.org>
>>>
>>> This no longer applies cleanly/obviously, please rebase, thanks!
>>
>> Done, unfortunately, aristainetos2 does not boot anymore... got:
>>
>>     ├─UBOOT (ari-ub)
>> │   │    <> ### Connect to "aristainetos" using command: /usr/bin/telnet ts2 7015
>> │   │    <> Trying 192.168.1.202...
>> │   │    <> Connected to ts2.
>> │   │    <> Escape character is '^]'.
>> │   │    <> <debug_uart> unrecognized JEDEC id bytes: 00, 00, 00
>> │   │    <> *** Warning - spi_flash_probe_bus_cs() failed, using default environment
>> │   │    <>
>> │   │    <> alloc space exhausted
>> │   │    <> alloc space exhausted
>> │   │    <> alloc space exhausted
>> │   │    <> himport_r: can't insert "loadbootscriptUSB=ext4load usb 0 ${loadaddr} ${script};" into 
>> hash table
>> │   │    <> alloc space exhausted
>> │   │    <> alloc space exhausted
>>
>> Seems early SPI NOR detection fails ...
>>
>> Have to start bisect, try to find some time...
> 
> Ok, commit:
> 
> commit 788ea834124bd6169ea10b2d37d5de48a2dd28a0 (bisect-788ea83412)
> Author: Patrick Delaunay <patrick.delaunay at st.com>
> Date:   Mon Jan 13 11:35:03 2020 +0100
> 
>      gpio: add function _dm_gpio_set_dir_flags
> 
>      Introduce the function _dm_gpio_set_dir_flags to set dir flags
>      without check if the GPIO is reserved.
> 
>      Separate the reserved check for "set_dir" and "set_dir_flags".
> 
>      This patch is a preliminary step to add new ops.
> 
>      Signed-off-by: Patrick Delaunay <patrick.delaunay at st.com>
>      Reviewed-by: Simon Glass <sjg at chromium.org>
> 
> breaks the aristainetos2 board ... reverting this patch (and therefore
> I needed some more patches to revert as it was a patchseries):
> 
> * dbf06f0e6c - (HEAD -> aristainetos-denx) Revert "gpio: add function _gpio_get_value" (vor 5 
> Minuten) <Heiko Schocher>
> * 5c85a7cc26 - Revert "gpio: add function _dm_gpio_set_dir_flags" (vor 5 Minuten) <Heiko Schocher>
> * c226d65d88 - Revert "gpio: add function check_dir_flags" (vor 5 Minuten) <Heiko Schocher>
> * 1423a40c69 - Revert "gpio: add helper GPIOD_FLAGS_OUTPUT" (vor 5 Minuten) <Heiko Schocher>
> * fb0176450f - Revert "gpio: update dir_flags management" (vor 5 Minuten) <Heiko Schocher>
> * 9d74cc5ecb - Revert "gpio: add support of new GPIO direction flag" (vor 5 Minuten) <Heiko Schocher>
> * 3bf361c206 - Revert "gpio: add ops to get dir flags" (vor 5 Minuten) <Heiko Schocher>
> * beb6d3c2d9 - Revert "gpio: add ops to set dir flags" (vor 5 Minuten) <Heiko Schocher>
> 
> And board boots again fine ...
> 
> I do not see, why commit 788ea834124bd6169ea10b2d37d5de48a2dd28a0
> makes SPI not working anymore ...
> 
> Any ideas?

Just looking with sandbox into it ... added debug patch:

diff --git a/drivers/gpio/gpio-uclass.c b/drivers/gpio/gpio-uclass.c
index 3fb6b6e69c..2e68f558bd 100644
--- a/drivers/gpio/gpio-uclass.c
+++ b/drivers/gpio/gpio-uclass.c
@@ -273,9 +273,11 @@ static int gpio_hog_probe(struct udevice *dev)
         struct gpio_hog_priv *priv = dev_get_priv(dev);
         int ret;

+       printf("%s: --------- dev->name: %s nr: %d flag: %d platflags: %d\n", __func__, dev->name, 
plat->val[0], plat->val[1], plat->gpiod_flags);
         ret = gpio_dev_request_index(dev->parent, dev->name, "gpio-hog",
                                      plat->val[0], plat->gpiod_flags,
                                      plat->val[1], &priv->gpiod);
+       printf("%s: --------- gpiod: %p\n", __func__, &priv->gpiod);
         if (ret < 0) {
                 debug("%s: node %s could not get gpio.\n", __func__,
                       dev->name);
@@ -291,6 +293,10 @@ static int gpio_hog_probe(struct udevice *dev)
                 }
         }

+       if (1) {
+               struct gpio_desc *gpiod = &priv->gpiod;
+               printf("%s: gpiod_flags: %x\n", __func__, gpiod->flags);
+       }
         return 0;
  }


and see:

=> ut dm gpio
Test: dm_test_gpio: gpio.c
gpio_hog_probe_all: ---------
gpio_hog_probe: --------- dev->name: hog_input_active_low nr: 0 flag: 1 platflags: 4
gpio_hog_probe: --------- gpiod: 0000000015901050
gpio_hog_probe: gpiod_flags: 8
gpio_hog_probe: --------- dev->name: hog_input_active_high nr: 1 flag: 0 platflags: 4
gpio_hog_probe: --------- gpiod: 00000000159010a0
gpio_hog_probe: gpiod_flags: 0
gpio_hog_probe: --------- dev->name: hog_output_low nr: 2 flag: 0 platflags: 2
gpio_hog_probe: --------- gpiod: 00000000159010f0
gpio_hog_probe: gpiod_flags: 0
gpio_hog_probe: --------- dev->name: hog_output_high nr: 3 flag: 0 platflags: 2
gpio_hog_probe: --------- gpiod: 0000000015901130
gpio_hog_probe: gpiod_flags: 0
gpio_hog_lookup_name: name: hog_input_active_low
gpio_hog_lookup_name: --------- gpiod: 15901050
test/dm/gpio.c:115, dm_test_gpio(): GPIOD_IS_IN | GPIOD_ACTIVE_LOW == desc->flags: Expected 0xc 
(12), got 0x8 (8)

It looks like the  plat->gpiod_flags are not written anymore into gpiod
through the gpio_dev_request_index() function ...

bye,
Heiko
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