Linux-GPIO Archive on lore.kernel.org
 help / color / Atom feed
* [PATCH v5] pinctrl: core: print gpio in pins debugfs file
@ 2020-07-22 12:27 Drew Fustini
  2020-07-26 22:35 ` Linus Walleij
  0 siblings, 1 reply; 2+ messages in thread
From: Drew Fustini @ 2020-07-22 12:27 UTC (permalink / raw)
  To: Andy Shevchenko, Tony Lindgren, Linus Walleij,
	Bartosz Golaszewski, Grygorii Strashko, Santosh Shilimkar,
	Kevin Hilman, linux-omap, linux-gpio, linux-kernel
  Cc: Drew Fustini, Andy Shevchenko

If there is a gpio range mapping for the pin, then print out the gpio
chip and line index for the pin in the debugfs 'pins' file with the
format: "[line-index]:[gpio-label]"

Here is example output on the BeagleBoard.org PocketBeagle (AM3358):
/sys/kernel/debug/pinctrl/44e10800.pinmux-pinctrl-single/pins

pin 25 (PIN25) 25:gpio-32-63 44e10864 00000037 pinctrl-single
pin 26 (PIN26) 26:gpio-32-63 44e10868 00000037 pinctrl-single
pin 27 (PIN27) 27:gpio-32-63 44e1086c 00000037 pinctrl-single
pin 28 (PIN28) 0:? 44e10870 00000036 pinctrl-single
pin 29 (PIN29) 0:? 44e10874 00000006 pinctrl-single
pin 30 (PIN30) 28:gpio-32-63 44e10878 00000027 pinctrl-single
pin 31 (PIN31) 29:gpio-32-63 44e1087c 00000037 pinctrl-single
pin 32 (PIN32) 30:gpio-32-63 44e10880 00000037 pinctrl-single
pin 33 (PIN33) 31:gpio-32-63 44e10884 00000037 pinctrl-single
pin 34 (PIN34) 0:gpio-64-95 44e10888 00000037 pinctrl-single
pin 35 (PIN35) 1:gpio-64-95 44e1088c 00000037 pinctrl-single

Suggested-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Suggested-by: Tony Lindgren <tony@atomide.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Drew Fustini <drew@beagleboard.org>
---
 drivers/pinctrl/core.c | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)

v4 changes:
- Andy suggested '0:?' would be better because GPIO library uses '?' in
  cases of unknown labels 

v3 changes:
- gpio column is now gpiochip label and line index

v2 changes:
- print 'NA' if pin does not have a GPIO number
- change gpio_num from unsigned to unsigned int per checkpatch

diff --git a/drivers/pinctrl/core.c b/drivers/pinctrl/core.c
index 821242bb4b16..02a4cc3b60c8 100644
--- a/drivers/pinctrl/core.c
+++ b/drivers/pinctrl/core.c
@@ -27,6 +27,7 @@
 #include <linux/pinctrl/machine.h>
 
 #ifdef CONFIG_GPIOLIB
+#include "../gpio/gpiolib.h"
 #include <asm-generic/gpio.h>
 #endif
 
@@ -1601,6 +1602,9 @@ static int pinctrl_pins_show(struct seq_file *s, void *what)
 	struct pinctrl_dev *pctldev = s->private;
 	const struct pinctrl_ops *ops = pctldev->desc->pctlops;
 	unsigned i, pin;
+	struct pinctrl_gpio_range *range;
+	unsigned int gpio_num;
+	struct gpio_chip *chip;
 
 	seq_printf(s, "registered pins: %d\n", pctldev->desc->npins);
 
@@ -1618,6 +1622,23 @@ static int pinctrl_pins_show(struct seq_file *s, void *what)
 
 		seq_printf(s, "pin %d (%s) ", pin, desc->name);
 
+#ifdef CONFIG_GPIOLIB
+		gpio_num = 0;
+		list_for_each_entry(range, &pctldev->gpio_ranges, node) {
+			if ((pin >= range->pin_base) &&
+			    (pin < (range->pin_base + range->npins))) {
+				gpio_num = range->base + (pin - range->pin_base);
+				break;
+			}
+		}
+		chip = gpio_to_chip(gpio_num);
+		if (chip && chip->gpiodev && chip->gpiodev->base)
+			seq_printf(s, "%u:%s ", gpio_num -
+				chip->gpiodev->base, chip->label);
+		else
+			seq_puts(s, "0:? ");
+#endif
+
 		/* Driver-specific info per pin */
 		if (ops->pin_dbg_show)
 			ops->pin_dbg_show(pctldev, s, pin);
-- 
2.25.1


^ permalink raw reply	[flat|nested] 2+ messages in thread

* Re: [PATCH v5] pinctrl: core: print gpio in pins debugfs file
  2020-07-22 12:27 [PATCH v5] pinctrl: core: print gpio in pins debugfs file Drew Fustini
@ 2020-07-26 22:35 ` Linus Walleij
  0 siblings, 0 replies; 2+ messages in thread
From: Linus Walleij @ 2020-07-26 22:35 UTC (permalink / raw)
  To: Drew Fustini
  Cc: Andy Shevchenko, Tony Lindgren, Bartosz Golaszewski,
	Grygorii Strashko, Santosh Shilimkar, Kevin Hilman, Linux-OMAP,
	open list:GPIO SUBSYSTEM, linux-kernel, Andy Shevchenko

On Wed, Jul 22, 2020 at 2:29 PM Drew Fustini <drew@beagleboard.org> wrote:

> If there is a gpio range mapping for the pin, then print out the gpio
> chip and line index for the pin in the debugfs 'pins' file with the
> format: "[line-index]:[gpio-label]"
>
> Here is example output on the BeagleBoard.org PocketBeagle (AM3358):
> /sys/kernel/debug/pinctrl/44e10800.pinmux-pinctrl-single/pins
>
> pin 25 (PIN25) 25:gpio-32-63 44e10864 00000037 pinctrl-single
> pin 26 (PIN26) 26:gpio-32-63 44e10868 00000037 pinctrl-single
> pin 27 (PIN27) 27:gpio-32-63 44e1086c 00000037 pinctrl-single
> pin 28 (PIN28) 0:? 44e10870 00000036 pinctrl-single
> pin 29 (PIN29) 0:? 44e10874 00000006 pinctrl-single
> pin 30 (PIN30) 28:gpio-32-63 44e10878 00000027 pinctrl-single
> pin 31 (PIN31) 29:gpio-32-63 44e1087c 00000037 pinctrl-single
> pin 32 (PIN32) 30:gpio-32-63 44e10880 00000037 pinctrl-single
> pin 33 (PIN33) 31:gpio-32-63 44e10884 00000037 pinctrl-single
> pin 34 (PIN34) 0:gpio-64-95 44e10888 00000037 pinctrl-single
> pin 35 (PIN35) 1:gpio-64-95 44e1088c 00000037 pinctrl-single
>
> Suggested-by: Andy Shevchenko <andy.shevchenko@gmail.com>
> Suggested-by: Tony Lindgren <tony@atomide.com>
> Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
> Signed-off-by: Drew Fustini <drew@beagleboard.org>

Neat, this v5 patch applied!

Yours,
Linus Walleij

^ permalink raw reply	[flat|nested] 2+ messages in thread

end of thread, back to index

Thread overview: 2+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2020-07-22 12:27 [PATCH v5] pinctrl: core: print gpio in pins debugfs file Drew Fustini
2020-07-26 22:35 ` Linus Walleij

Linux-GPIO Archive on lore.kernel.org

Archives are clonable:
	git clone --mirror https://lore.kernel.org/linux-gpio/0 linux-gpio/git/0.git

	# If you have public-inbox 1.1+ installed, you may
	# initialize and index your mirror using the following commands:
	public-inbox-init -V2 linux-gpio linux-gpio/ https://lore.kernel.org/linux-gpio \
		linux-gpio@vger.kernel.org
	public-inbox-index linux-gpio

Example config snippet for mirrors

Newsgroup available over NNTP:
	nntp://nntp.lore.kernel.org/org.kernel.vger.linux-gpio


AGPL code for this site: git clone https://public-inbox.org/public-inbox.git