gpiolib: introduce chip_* to print with chip->label prefix

In several places we are printing messages with prefix based on chip->label.
Introduced macros help us to do this easier and in uniform way.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Alexandre Courbot <acourbot@nvidia.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c
index 2dc3657..30ae386 100644 (file)
--- a/drivers/gpio/gpiolib.c
+++ b/drivers/gpio/gpiolib.c
@@ -84,6 +84,8 @@ static DEFINE_IDR(dirent_idr);
 static int gpiod_request(struct gpio_desc *desc, const char *label);
 static void gpiod_free(struct gpio_desc *desc);
 
+/* With descriptor prefix */
+
 #ifdef CONFIG_DEBUG_FS
 #define gpiod_emerg(desc, fmt, ...)                                           \
        pr_emerg("gpio-%d (%s): " fmt, desc_to_gpio(desc), desc->label ? : "?",\
@@ -118,6 +120,21 @@ static void gpiod_free(struct gpio_desc *desc);
        pr_debug("gpio-%d: " fmt, desc_to_gpio(desc), ##__VA_ARGS__)
 #endif
 
+/* With chip prefix */
+
+#define chip_emerg(chip, fmt, ...)                                     \
+       pr_emerg("GPIO chip %s: " fmt, chip->label, ##__VA_ARGS__)
+#define chip_crit(chip, fmt, ...)                                      \
+       pr_crit("GPIO chip %s: " fmt, chip->label, ##__VA_ARGS__)
+#define chip_err(chip, fmt, ...)                                       \
+       pr_err("GPIO chip %s: " fmt, chip->label, ##__VA_ARGS__)
+#define chip_warn(chip, fmt, ...)                                      \
+       pr_warn("GPIO chip %s: " fmt, chip->label, ##__VA_ARGS__)
+#define chip_info(chip, fmt, ...)                                      \
+       pr_info("GPIO chip %s: " fmt, chip->label, ##__VA_ARGS__)
+#define chip_dbg(chip, fmt, ...)                                       \
+       pr_debug("GPIO chip %s: " fmt, chip->label, ##__VA_ARGS__)
+
 static inline void desc_set_label(struct gpio_desc *d, const char *label)
 {
 #ifdef CONFIG_DEBUG_FS
@@ -1032,8 +1049,7 @@ static int gpiochip_export(struct gpio_chip *chip)
                        chip->desc[gpio++].chip = NULL;
                spin_unlock_irqrestore(&gpio_lock, flags);
 
-               pr_debug("%s: chip %s status %d\n", __func__,
-                               chip->label, status);
+               chip_dbg(chip, "%s: status %d\n", __func__, status);
        }
 
        return status;
@@ -1056,8 +1072,7 @@ static void gpiochip_unexport(struct gpio_chip *chip)
        mutex_unlock(&sysfs_lock);
 
        if (status)
-               pr_debug("%s: chip %s status %d\n", __func__,
-                               chip->label, status);
+               chip_dbg(chip, "%s: status %d\n", __func__, status);
 }
 
 static int __init gpiolib_sysfs_init(void)
@@ -1337,8 +1352,7 @@ int gpiochip_add_pingroup_range(struct gpio_chip *chip,
 
        pin_range = kzalloc(sizeof(*pin_range), GFP_KERNEL);
        if (!pin_range) {
-               pr_err("%s: GPIO chip: failed to allocate pin ranges\n",
-                               chip->label);
+               chip_err(chip, "failed to allocate pin ranges\n");
                return -ENOMEM;
        }
 
@@ -1359,9 +1373,8 @@ int gpiochip_add_pingroup_range(struct gpio_chip *chip,
 
        pinctrl_add_gpio_range(pctldev, &pin_range->range);
 
-       pr_debug("GPIO chip %s: created GPIO range %d->%d ==> %s PINGRP %s\n",
-                chip->label, gpio_offset,
-                gpio_offset + pin_range->range.npins - 1,
+       chip_dbg(chip, "created GPIO range %d->%d ==> %s PINGRP %s\n",
+                gpio_offset, gpio_offset + pin_range->range.npins - 1,
                 pinctrl_dev_get_devname(pctldev), pin_group);
 
        list_add_tail(&pin_range->node, &chip->pin_ranges);
@@ -1388,8 +1401,7 @@ int gpiochip_add_pin_range(struct gpio_chip *chip, const char *pinctl_name,
 
        pin_range = kzalloc(sizeof(*pin_range), GFP_KERNEL);
        if (!pin_range) {
-               pr_err("%s: GPIO chip: failed to allocate pin ranges\n",
-                               chip->label);
+               chip_err(chip, "failed to allocate pin ranges\n");
                return -ENOMEM;
        }
 
@@ -1404,13 +1416,12 @@ int gpiochip_add_pin_range(struct gpio_chip *chip, const char *pinctl_name,
                        &pin_range->range);
        if (IS_ERR(pin_range->pctldev)) {
                ret = PTR_ERR(pin_range->pctldev);
-               pr_err("%s: GPIO chip: could not create pin range\n",
-                      chip->label);
+               chip_err(chip, "could not create pin range\n");
                kfree(pin_range);
                return ret;
        }
-       pr_debug("GPIO chip %s: created GPIO range %d->%d ==> %s PIN %d->%d\n",
-                chip->label, gpio_offset, gpio_offset + npins - 1,
+       chip_dbg(chip, "created GPIO range %d->%d ==> %s PIN %d->%d\n",
+                gpio_offset, gpio_offset + npins - 1,
                 pinctl_name,
                 pin_offset, pin_offset + npins - 1);