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authorDrew Fustini <drew@beagleboard.org>2020-07-22 14:27:52 +0200
committerLinus Walleij <linus.walleij@linaro.org>2020-08-04 01:29:10 +0200
commitf1b206cf7c57561ea156798f323b0541a783bd2f (patch)
treef268163becc9baf5a1c106638cb8fe398a010d0f /drivers/pinctrl
parentc1282ae87882aff2a1adbc8d168c8fb3391d288a (diff)
downloadlinux-f1b206cf7c57561ea156798f323b0541a783bd2f.tar.bz2
pinctrl: core: print gpio in pins debugfs file
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>
Diffstat (limited to 'drivers/pinctrl')
-rw-r--r--drivers/pinctrl/core.c21
1 files changed, 21 insertions, 0 deletions
diff --git a/drivers/pinctrl/core.c b/drivers/pinctrl/core.c
index 3e8d1630d29e..3663d87f51a0 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);