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>

diff --git a/drivers/pinctrl/pinmux.c b/drivers/pinctrl/pinmux.c
index c58c168..77f82b2 100644 (file)
--- 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,