Add some information about gpio names to the debugfs gpio file. name and
label of a GPIO are then displayed next to each other. This way it is
easy to see what the real name of GPIO is and what the driver requested
it for.
Signed-off-by: Markus Pargmann <m...@pengutronix.de>
---
Documentation/ABI/testing/sysfs-gpio | 1 +
drivers/gpio/gpiolib.c | 11 ++++++++---
2 files changed, 9 insertions(+), 3 deletions(-)
diff --git a/Documentation/ABI/testing/sysfs-gpio
b/Documentation/ABI/testing/sysfs-gpio
index 55ffa2df1c10..2c1e199fd4e1 100644
--- a/Documentation/ABI/testing/sysfs-gpio
+++ b/Documentation/ABI/testing/sysfs-gpio
@@ -21,6 +21,7 @@ Description:
/value ... always readable, writes fail for input GPIOs
/direction ... r/w as: in, out (default low); write: high, low
/edge ... r/w as: none, falling, rising, both
+ /name ... r/o, unique name of the GPIO
/gpiochipN ... for each gpiochip; #N is its first GPIO
/base ... (r/o) same as N
/label ... (r/o) descriptive, not necessarily unique
diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c
index 3908503bebfe..79a0b41ce57b 100644
--- a/drivers/gpio/gpiolib.c
+++ b/drivers/gpio/gpiolib.c
@@ -2344,14 +2344,19 @@ static void gpiolib_dbg_show(struct seq_file *s, struct
gpio_chip *chip)
int is_irq;
for (i = 0; i < chip->ngpio; i++, gpio++, gdesc++) {
- if (!test_bit(FLAG_REQUESTED, &gdesc->flags))
+ if (!test_bit(FLAG_REQUESTED, &gdesc->flags)) {
+ if (gdesc->name) {
+ seq_printf(s, " gpio-%-3d (%-20.20s)\n",
+ gpio, gdesc->name);
+ }
continue;
+ }
gpiod_get_direction(gdesc);
is_out = test_bit(FLAG_IS_OUT, &gdesc->flags);
is_irq = test_bit(FLAG_USED_AS_IRQ, &gdesc->flags);
- seq_printf(s, " gpio-%-3d (%-20.20s) %s %s %s",
- gpio, gdesc->label,
+ seq_printf(s, " gpio-%-3d (%-20.20s|%-20.20s) %s %s %s",
+ gpio, gdesc->name ? gdesc->name : "", gdesc->label,
is_out ? "out" : "in ",
chip->get
? (chip->get(chip, i) ? "hi" : "lo")
--
2.4.6
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