Merge tag 'pinctrl-for-3.4' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl

Pull pinctrl updates for v3.4 from Linus Walleij (*):
 - Switches the PXA 168, 910 and MMP over to use pinctrl
 - Locking revamped
 - Massive refactorings...
 - Reform the driver API to use multiple states
 - Support pin config in the mapping tables
 - Pinctrl drivers for the nVidia Tegra series
 - Generic pin config support lib for simple pin controllers
 - Implement pin config for the U300

* tag 'pinctrl-for-3.4' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl: (48 commits)
  ARM: u300: configure some pins as an example
  pinctrl: support pinconfig on the U300
  pinctrl/coh901: use generic pinconf enums and parameters
  pinctrl: introduce generic pin config
  pinctrl: fix error path in pinconf_map_to_setting()
  pinctrl: allow concurrent gpio and mux function ownership of pins
  pinctrl: forward-declare struct device
  pinctrl: split pincontrol states into its own header
  pinctrl: include machine header to core.h
  ARM: tegra: Select PINCTRL Kconfig variables
  pinctrl: add a driver for NVIDIA Tegra
  pinctrl: Show selected function and group in pinmux-pins debugfs
  pinctrl: enhance mapping table to support pin config operations
  pinctrl: API changes to support multiple states per device
  pinctrl: add usecount to pins for muxing
  pinctrl: refactor struct pinctrl handling in core.c vs pinmux.c
  pinctrl: fix and simplify locking
  pinctrl: fix the pin descriptor kerneldoc
  pinctrl: assume map table entries can't have a NULL name field
  pinctrl: introduce PINCTRL_STATE_DEFAULT, define hogs as that state
  ...

(*) What is it with all these Linuses these days? There's a Linus at
    google too.  Some day I will get myself my own broadsword, and run
    around screaming "There can be only one".

    I used to be _special_ dammit. Snif.

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