pinctrl: improve debugfs for strict controllers

If we know we are using a strict pin controller (one that cannot
mix device functions+group use and GPIO) we can be a bit more
specific in debugfs, just print either device-function-group
or GPIO consumer for the pin. Let's do that to be helpful.

Cc: Sonic Zhang <sonic.zhang@analog.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

1 files changed, 33 insertions, 8 deletions

diff --git a/drivers/pinctrl/pinmux.c b/drivers/pinctrl/pinmux.c
index c58c168b06c2..77f82b23f7be 100644
--- a/drivers/pinctrl/pinmux.c
+++ b/drivers/pinctrl/pinmux.c
@@ -585,7 +585,12 @@ static int pinmux_pins_show(struct seq_file *s, void *what)
                 return 0;
 
         seq_puts(s, "Pinmux settings per pin\n");
-        seq_puts(s, "Format: pin (name): mux_owner gpio_owner hog?\n");
+        if (pmxops->strict)
+                seq_puts(s,
+                 "Format: pin (name): mux_owner|gpio_owner (strict) hog?\n");
+        else
+                seq_puts(s,
+                "Format: pin (name): mux_owner gpio_owner hog?\n");
 
         mutex_lock(&pctldev->mutex);
 
@@ -604,14 +609,34 @@ static int pinmux_pins_show(struct seq_file *s, void *what)
                     !strcmp(desc->mux_owner, pinctrl_dev_get_name(pctldev)))
                         is_hog = true;
 
-                seq_printf(s, "pin %d (%s): %s %s%s", pin,
-                           desc->name ? desc->name : "unnamed",
-                           desc->mux_owner ? desc->mux_owner
-                                : "(MUX UNCLAIMED)",
-                           desc->gpio_owner ? desc->gpio_owner
-                                : "(GPIO UNCLAIMED)",
-                           is_hog ? " (HOG)" : "");
+                if (pmxops->strict) {
+                        if (desc->mux_owner)
+                                seq_printf(s, "pin %d (%s): device %s%s",
+                                           pin,
+                                           desc->name ? desc->name : "unnamed",
+                                           desc->mux_owner,
+                                           is_hog ? " (HOG)" : "");
+                        else if (desc->gpio_owner)
+                                seq_printf(s, "pin %d (%s): GPIO %s",
+                                           pin,
+                                           desc->name ? desc->name : "unnamed",
+                                           desc->gpio_owner);
+                        else
+                                seq_printf(s, "pin %d (%s): UNCLAIMED",
+                                           pin,
+                                           desc->name ? desc->name : "unnamed");
+                } else {
+                        /* For non-strict controllers */
+                        seq_printf(s, "pin %d (%s): %s %s%s", pin,
+                                   desc->name ? desc->name : "unnamed",
+                                   desc->mux_owner ? desc->mux_owner
+                                   : "(MUX UNCLAIMED)",
+                                   desc->gpio_owner ? desc->gpio_owner
+                                   : "(GPIO UNCLAIMED)",
+                                   is_hog ? " (HOG)" : "");
+                }
 
+                /* If mux: print function+group claiming the pin */
                 if (desc->mux_setting)
                         seq_printf(s, " function %s group %s\n",
                                    pmxops->get_function_name(pctldev,