gpio/nomadik: show all pins in debug

Useful to check the status of the runtime pin muxing.

Signed-off-by: Rabin Vincent <rabin.vincent@stericsson.com>
Reviewed-by: Srinidhi Kasagar <srinidhi.kasagar@stericsson.com>
[Squashed, modified to use chip-internal IRQ trigger state]
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>

1 files changed, 27 insertions, 4 deletions

diff --git a/drivers/gpio/gpio-nomadik.c b/drivers/gpio/gpio-nomadik.c
index 307b8131aa8c..380204781f84 100644
--- a/drivers/gpio/gpio-nomadik.c
+++ b/drivers/gpio/gpio-nomadik.c
@@ -811,20 +811,43 @@ static void nmk_gpio_dbg_show(struct seq_file *s, struct gpio_chip *chip)
                 bool pull;
                 u32 bit = 1 << i;
 
-                if (!label)
-                        continue;
-
                 is_out = readl(nmk_chip->addr + NMK_GPIO_DIR) & bit;
                 pull = !(readl(nmk_chip->addr + NMK_GPIO_PDIS) & bit);
                 mode = nmk_gpio_get_mode(gpio);
                 seq_printf(s, " gpio-%-3d (%-20.20s) %s %s %s %s",
-                        gpio, label,
+                        gpio, label ?: "(none)",
                         is_out ? "out" : "in ",
                         chip->get
                                 ? (chip->get(chip, i) ? "hi" : "lo")
                                 : "?  ",
                         (mode < 0) ? "unknown" : modes[mode],
                         pull ? "pull" : "none");
+
+                if (label && !is_out) {
+                        int             irq = gpio_to_irq(gpio);
+                        struct irq_desc *desc = irq_to_desc(irq);
+
+                        /* This races with request_irq(), set_irq_type(),
+                         * and set_irq_wake() ... but those are "rare".
+                         */
+                        if (irq >= 0 && desc->action) {
+                                char *trigger;
+                                u32 bitmask = nmk_gpio_get_bitmask(gpio);
+
+                                if (nmk_chip->edge_rising & bitmask)
+                                        trigger = "edge-rising";
+                                else if (nmk_chip->edge_falling & bitmask)
+                                        trigger = "edge-falling";
+                                else
+                                        trigger = "edge-undefined";
+
+                                seq_printf(s, " irq-%d %s%s",
+                                        irq, trigger,
+                                        irqd_is_wakeup_set(&desc->irq_data)
+                                                ? " wakeup" : "");
+                        }
+                }
+
                 seq_printf(s, "\n");
         }
 }