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hte: tegra194: improve the GPIO-related comment

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Using any of the GPIO interfaces using the global numberspace is
deprecated. Make it clear in the comment.

Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Reviewed-by: Dipen Patel <dipenp@nvidia.com>
Signed-off-by: Dipen Patel <dipenp@nvidia.com>
This commit is contained in:
Bartosz Golaszewski 2023-09-11 11:44:43 +02:00 committed by Dipen Patel
parent 63137bee5a
commit 06eaa531f2
1 changed files with 8 additions and 5 deletions
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13
drivers/hte/hte-tegra194.c
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@ -407,12 +407,15 @@ static int tegra_hte_line_xlate(struct hte_chip *gc,
return -EINVAL;
/*
* GPIO consumers can access GPIOs in two ways:
*
* There are two paths GPIO consumers can take as follows:
* 1) The consumer (gpiolib-cdev for example) which uses GPIO global
* number which gets assigned run time.
* 2) The consumer passing GPIO from the DT which is assigned
* statically for example by using TEGRA194_AON_GPIO gpio DT binding.
* 1) Using the global GPIO numberspace.
*
* This is the old, now DEPRECATED method and should not be used in
* new code. TODO: Check if tegra is even concerned by this.
*
* 2) Using GPIO descriptors that can be assigned to consumer devices
* using device-tree, ACPI or lookup tables.
*
* The code below addresses both the consumer use cases and maps into
* HTE/GTE namespace.