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pinctrl: core: print gpio in pins debugfs file

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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>
Signed-off-by: Drew Fustini <drew@beagleboard.org>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Link: https://lore.kernel.org/r/20200722122751.266440-1-drew@beagleboard.org
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This commit is contained in:
Drew Fustini 2020-07-22 14:27:52 +02:00 committed by Linus Walleij
parent c1282ae878
commit f1b206cf7c
1 changed files with 21 additions and 0 deletions
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21
drivers/pinctrl/core.c
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@ -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);