1 files changed, 120 insertions, 0 deletions

diff --git a/drivers/pinctrl/pinconf-generic.c b/drivers/pinctrl/pinconf-generic.c
new file mode 100644
index 000000000000..33fbaeaa65dd
--- /dev/null
+++ b/drivers/pinctrl/pinconf-generic.c
@@ -0,0 +1,120 @@
+/*
+ * Core driver for the generic pin config portions of the pin control subsystem
+ *
+ * Copyright (C) 2011 ST-Ericsson SA
+ * Written on behalf of Linaro for ST-Ericsson
+ *
+ * Author: Linus Walleij <linus.walleij@linaro.org>
+ *
+ * License terms: GNU General Public License (GPL) version 2
+ */
+
+#define pr_fmt(fmt) "generic pinconfig core: " fmt
+
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/device.h>
+#include <linux/slab.h>
+#include <linux/debugfs.h>
+#include <linux/seq_file.h>
+#include <linux/pinctrl/pinctrl.h>
+#include <linux/pinctrl/pinconf.h>
+#include <linux/pinctrl/pinconf-generic.h>
+#include "core.h"
+#include "pinconf.h"
+
+#ifdef CONFIG_DEBUG_FS
+
+struct pin_config_item {
+        const enum pin_config_param param;
+        const char * const display;
+        const char * const format;
+};
+
+#define PCONFDUMP(a, b, c) { .param = a, .display = b, .format = c }
+
+struct pin_config_item conf_items[] = {
+        PCONFDUMP(PIN_CONFIG_BIAS_DISABLE, "input bias disabled", NULL),
+        PCONFDUMP(PIN_CONFIG_BIAS_HIGH_IMPEDANCE, "input bias high impedance", NULL),
+        PCONFDUMP(PIN_CONFIG_BIAS_PULL_UP, "input bias pull up", NULL),
+        PCONFDUMP(PIN_CONFIG_BIAS_PULL_DOWN, "input bias pull down", NULL),
+        PCONFDUMP(PIN_CONFIG_DRIVE_PUSH_PULL, "output drive push pull", NULL),
+        PCONFDUMP(PIN_CONFIG_DRIVE_OPEN_DRAIN, "output drive open drain", NULL),
+        PCONFDUMP(PIN_CONFIG_DRIVE_OPEN_SOURCE, "output drive open source", NULL),
+        PCONFDUMP(PIN_CONFIG_INPUT_SCHMITT, "input schmitt trigger", NULL),
+        PCONFDUMP(PIN_CONFIG_INPUT_DEBOUNCE, "input debounce", "time units"),
+        PCONFDUMP(PIN_CONFIG_POWER_SOURCE, "pin power source", "selector"),
+        PCONFDUMP(PIN_CONFIG_LOW_POWER_MODE, "pin low power", "mode"),
+};
+
+void pinconf_generic_dump_pin(struct pinctrl_dev *pctldev,
+                              struct seq_file *s, unsigned pin)
+{
+        const struct pinconf_ops *ops = pctldev->desc->confops;
+        int i;
+
+        if (!ops->is_generic)
+                return;
+
+        for(i = 0; i < ARRAY_SIZE(conf_items); i++) {
+                unsigned long config;
+                int ret;
+
+                /* We want to check out this parameter */
+                config = pinconf_to_config_packed(conf_items[i].param, 0);
+                ret = pin_config_get_for_pin(pctldev, pin, &config);
+                /* These are legal errors */
+                if (ret == -EINVAL || ret == -ENOTSUPP)
+                        continue;
+                if (ret) {
+                        seq_printf(s, "ERROR READING CONFIG SETTING %d ", i);
+                        continue;
+                }
+                /* Space between multiple configs */
+                seq_puts(s, " ");
+                seq_puts(s, conf_items[i].display);
+                /* Print unit if available */
+                if (conf_items[i].format &&
+                    pinconf_to_config_argument(config) != 0)
+                        seq_printf(s, " (%u %s)",
+                                   pinconf_to_config_argument(config),
+                                   conf_items[i].format);
+        }
+}
+
+void pinconf_generic_dump_group(struct pinctrl_dev *pctldev,
+                              struct seq_file *s, const char *gname)
+{
+        const struct pinconf_ops *ops = pctldev->desc->confops;
+        int i;
+
+        if (!ops->is_generic)
+                return;
+
+        for(i = 0; i < ARRAY_SIZE(conf_items); i++) {
+                unsigned long config;
+                int ret;
+
+                /* We want to check out this parameter */
+                config = pinconf_to_config_packed(conf_items[i].param, 0);
+                ret = pin_config_group_get(dev_name(pctldev->dev), gname,
+                                           &config);
+                /* These are legal errors */
+                if (ret == -EINVAL || ret == -ENOTSUPP)
+                        continue;
+                if (ret) {
+                        seq_printf(s, "ERROR READING CONFIG SETTING %d ", i);
+                        continue;
+                }
+                /* Space between multiple configs */
+                seq_puts(s, " ");
+                seq_puts(s, conf_items[i].display);
+                /* Print unit if available */
+                if (conf_items[i].format && config != 0)
+                        seq_printf(s, " (%u %s)",
+                                   pinconf_to_config_argument(config),
+                                   conf_items[i].format);
+        }
+}
+
+#endif