arch/arm/mach-tegra/pinmux.c - android_kernel_htc_msm8960 - Gitiles

 /*
  * linux/arch/arm/mach-tegra/pinmux.c
  *
  * Copyright (C) 2010 Google, Inc.
  *
  * This software is licensed under the terms of the GNU General Public
  * License version 2, as published by the Free Software Foundation, and
  * may be copied, distributed, and modified under those terms.
  *
  * This program is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  * GNU General Public License for more details.
  *
  */

 #include <linux/init.h>
 #include <linux/module.h>
 #include <linux/kernel.h>
 #include <linux/errno.h>
 #include <linux/spinlock.h>
 #include <linux/io.h>

 #include <mach/iomap.h>
 #include <mach/pinmux.h>

 #define HSM_EN(reg)	(((reg) >> 2) & 0x1)
 #define SCHMT_EN(reg)	(((reg) >> 3) & 0x1)
 #define LPMD(reg)	(((reg) >> 4) & 0x3)
 #define DRVDN(reg)	(((reg) >> 12) & 0x1f)
 #define DRVUP(reg)	(((reg) >> 20) & 0x1f)
 #define SLWR(reg)	(((reg) >> 28) & 0x3)
 #define SLWF(reg)	(((reg) >> 30) & 0x3)

 static const struct tegra_pingroup_desc *const pingroups = tegra_soc_pingroups;
 static const struct tegra_drive_pingroup_desc *const drive_pingroups = tegra_soc_drive_pingroups;

 static char *tegra_mux_names[TEGRA_MAX_MUX] = {
 	[TEGRA_MUX_AHB_CLK] = "AHB_CLK",
 	[TEGRA_MUX_APB_CLK] = "APB_CLK",
 	[TEGRA_MUX_AUDIO_SYNC] = "AUDIO_SYNC",
 	[TEGRA_MUX_CRT] = "CRT",
 	[TEGRA_MUX_DAP1] = "DAP1",
 	[TEGRA_MUX_DAP2] = "DAP2",
 	[TEGRA_MUX_DAP3] = "DAP3",
 	[TEGRA_MUX_DAP4] = "DAP4",
 	[TEGRA_MUX_DAP5] = "DAP5",
 	[TEGRA_MUX_DISPLAYA] = "DISPLAYA",
 	[TEGRA_MUX_DISPLAYB] = "DISPLAYB",
 	[TEGRA_MUX_EMC_TEST0_DLL] = "EMC_TEST0_DLL",
 	[TEGRA_MUX_EMC_TEST1_DLL] = "EMC_TEST1_DLL",
 	[TEGRA_MUX_GMI] = "GMI",
 	[TEGRA_MUX_GMI_INT] = "GMI_INT",
 	[TEGRA_MUX_HDMI] = "HDMI",
 	[TEGRA_MUX_I2C] = "I2C",
 	[TEGRA_MUX_I2C2] = "I2C2",
 	[TEGRA_MUX_I2C3] = "I2C3",
 	[TEGRA_MUX_IDE] = "IDE",
 	[TEGRA_MUX_IRDA] = "IRDA",
 	[TEGRA_MUX_KBC] = "KBC",
 	[TEGRA_MUX_MIO] = "MIO",
 	[TEGRA_MUX_MIPI_HS] = "MIPI_HS",
 	[TEGRA_MUX_NAND] = "NAND",
 	[TEGRA_MUX_OSC] = "OSC",
 	[TEGRA_MUX_OWR] = "OWR",
 	[TEGRA_MUX_PCIE] = "PCIE",
 	[TEGRA_MUX_PLLA_OUT] = "PLLA_OUT",
 	[TEGRA_MUX_PLLC_OUT1] = "PLLC_OUT1",
 	[TEGRA_MUX_PLLM_OUT1] = "PLLM_OUT1",
 	[TEGRA_MUX_PLLP_OUT2] = "PLLP_OUT2",
 	[TEGRA_MUX_PLLP_OUT3] = "PLLP_OUT3",
 	[TEGRA_MUX_PLLP_OUT4] = "PLLP_OUT4",
 	[TEGRA_MUX_PWM] = "PWM",
 	[TEGRA_MUX_PWR_INTR] = "PWR_INTR",
 	[TEGRA_MUX_PWR_ON] = "PWR_ON",
 	[TEGRA_MUX_RTCK] = "RTCK",
 	[TEGRA_MUX_SDIO1] = "SDIO1",
 	[TEGRA_MUX_SDIO2] = "SDIO2",
 	[TEGRA_MUX_SDIO3] = "SDIO3",
 	[TEGRA_MUX_SDIO4] = "SDIO4",
 	[TEGRA_MUX_SFLASH] = "SFLASH",
 	[TEGRA_MUX_SPDIF] = "SPDIF",
 	[TEGRA_MUX_SPI1] = "SPI1",
 	[TEGRA_MUX_SPI2] = "SPI2",
 	[TEGRA_MUX_SPI2_ALT] = "SPI2_ALT",
 	[TEGRA_MUX_SPI3] = "SPI3",
 	[TEGRA_MUX_SPI4] = "SPI4",
 	[TEGRA_MUX_TRACE] = "TRACE",
 	[TEGRA_MUX_TWC] = "TWC",
 	[TEGRA_MUX_UARTA] = "UARTA",
 	[TEGRA_MUX_UARTB] = "UARTB",
 	[TEGRA_MUX_UARTC] = "UARTC",
 	[TEGRA_MUX_UARTD] = "UARTD",
 	[TEGRA_MUX_UARTE] = "UARTE",
 	[TEGRA_MUX_ULPI] = "ULPI",
 	[TEGRA_MUX_VI] = "VI",
 	[TEGRA_MUX_VI_SENSOR_CLK] = "VI_SENSOR_CLK",
 	[TEGRA_MUX_XIO] = "XIO",
 	[TEGRA_MUX_SAFE] = "<safe>",
 };

 static const char *tegra_drive_names[TEGRA_MAX_DRIVE] = {
 	[TEGRA_DRIVE_DIV_8] = "DIV_8",
 	[TEGRA_DRIVE_DIV_4] = "DIV_4",
 	[TEGRA_DRIVE_DIV_2] = "DIV_2",
 	[TEGRA_DRIVE_DIV_1] = "DIV_1",
 };

 static const char *tegra_slew_names[TEGRA_MAX_SLEW] = {
 	[TEGRA_SLEW_FASTEST] = "FASTEST",
 	[TEGRA_SLEW_FAST] = "FAST",
 	[TEGRA_SLEW_SLOW] = "SLOW",
 	[TEGRA_SLEW_SLOWEST] = "SLOWEST",
 };

 static DEFINE_SPINLOCK(mux_lock);

 static const char *pingroup_name(enum tegra_pingroup pg)
 {
 	if (pg < 0 || pg >=  TEGRA_MAX_PINGROUP)
 		return "<UNKNOWN>";

 	return pingroups[pg].name;
 }

 static const char *func_name(enum tegra_mux_func func)
 {
 	if (func == TEGRA_MUX_RSVD1)
 		return "RSVD1";

 	if (func == TEGRA_MUX_RSVD2)
 		return "RSVD2";

 	if (func == TEGRA_MUX_RSVD3)
 		return "RSVD3";

 	if (func == TEGRA_MUX_RSVD4)
 		return "RSVD4";

 	if (func == TEGRA_MUX_NONE)
 		return "NONE";

 	if (func < 0 || func >=  TEGRA_MAX_MUX)
 		return "<UNKNOWN>";

 	return tegra_mux_names[func];
 }


 static const char *tri_name(unsigned long val)
 {
 	return val ? "TRISTATE" : "NORMAL";
 }

 static const char *pupd_name(unsigned long val)
 {
 	switch (val) {
 	case 0:
 		return "NORMAL";

 	case 1:
 		return "PULL_DOWN";

 	case 2:
 		return "PULL_UP";

 	default:
 		return "RSVD";
 	}
 }


 static inline unsigned long pg_readl(unsigned long offset)
 {
 	return readl(IO_TO_VIRT(TEGRA_APB_MISC_BASE + offset));
 }

 static inline void pg_writel(unsigned long value, unsigned long offset)
 {
 	writel(value, IO_TO_VIRT(TEGRA_APB_MISC_BASE + offset));
 }

 static int tegra_pinmux_set_func(const struct tegra_pingroup_config *config)
 {
 	int mux = -1;
 	int i;
 	unsigned long reg;
 	unsigned long flags;
 	enum tegra_pingroup pg = config->pingroup;
 	enum tegra_mux_func func = config->func;

 	if (pg < 0 || pg >=  TEGRA_MAX_PINGROUP)
 		return -ERANGE;

 	if (pingroups[pg].mux_reg < 0)
 		return -EINVAL;

 	if (func < 0)
 		return -ERANGE;

 	if (func == TEGRA_MUX_SAFE)
 		func = pingroups[pg].func_safe;

 	if (func & TEGRA_MUX_RSVD) {
 		mux = func & 0x3;
 	} else {
 		for (i = 0; i < 4; i++) {
 			if (pingroups[pg].funcs[i] == func) {
 				mux = i;
 				break;
 			}
 		}
 	}

 	if (mux < 0)
 		return -EINVAL;

 	spin_lock_irqsave(&mux_lock, flags);

 	reg = pg_readl(pingroups[pg].mux_reg);
 	reg &= ~(0x3 << pingroups[pg].mux_bit);
 	reg |= mux << pingroups[pg].mux_bit;
 	pg_writel(reg, pingroups[pg].mux_reg);

 	spin_unlock_irqrestore(&mux_lock, flags);

 	return 0;
 }

 int tegra_pinmux_set_tristate(enum tegra_pingroup pg,
 	enum tegra_tristate tristate)
 {
 	unsigned long reg;
 	unsigned long flags;

 	if (pg < 0 || pg >=  TEGRA_MAX_PINGROUP)
 		return -ERANGE;

 	if (pingroups[pg].tri_reg < 0)
 		return -EINVAL;

 	spin_lock_irqsave(&mux_lock, flags);

 	reg = pg_readl(pingroups[pg].tri_reg);
 	reg &= ~(0x1 << pingroups[pg].tri_bit);
 	if (tristate)
 		reg |= 1 << pingroups[pg].tri_bit;
 	pg_writel(reg, pingroups[pg].tri_reg);

 	spin_unlock_irqrestore(&mux_lock, flags);

 	return 0;
 }

 int tegra_pinmux_set_pullupdown(enum tegra_pingroup pg,
 	enum tegra_pullupdown pupd)
 {
 	unsigned long reg;
 	unsigned long flags;

 	if (pg < 0 || pg >=  TEGRA_MAX_PINGROUP)
 		return -ERANGE;

 	if (pingroups[pg].pupd_reg < 0)
 		return -EINVAL;

 	if (pupd != TEGRA_PUPD_NORMAL &&
 	    pupd != TEGRA_PUPD_PULL_DOWN &&
 	    pupd != TEGRA_PUPD_PULL_UP)
 		return -EINVAL;


 	spin_lock_irqsave(&mux_lock, flags);

 	reg = pg_readl(pingroups[pg].pupd_reg);
 	reg &= ~(0x3 << pingroups[pg].pupd_bit);
 	reg |= pupd << pingroups[pg].pupd_bit;
 	pg_writel(reg, pingroups[pg].pupd_reg);

 	spin_unlock_irqrestore(&mux_lock, flags);

 	return 0;
 }

 static void tegra_pinmux_config_pingroup(const struct tegra_pingroup_config *config)
 {
 	enum tegra_pingroup pingroup = config->pingroup;
 	enum tegra_mux_func func     = config->func;
 	enum tegra_pullupdown pupd   = config->pupd;
 	enum tegra_tristate tristate = config->tristate;
 	int err;

 	if (pingroups[pingroup].mux_reg >= 0) {
 		err = tegra_pinmux_set_func(config);
 		if (err < 0)
 			pr_err("pinmux: can't set pingroup %s func to %s: %d\n",
 			       pingroup_name(pingroup), func_name(func), err);
 	}

 	if (pingroups[pingroup].pupd_reg >= 0) {
 		err = tegra_pinmux_set_pullupdown(pingroup, pupd);
 		if (err < 0)
 			pr_err("pinmux: can't set pingroup %s pullupdown to %s: %d\n",
 			       pingroup_name(pingroup), pupd_name(pupd), err);
 	}

 	if (pingroups[pingroup].tri_reg >= 0) {
 		err = tegra_pinmux_set_tristate(pingroup, tristate);
 		if (err < 0)
 			pr_err("pinmux: can't set pingroup %s tristate to %s: %d\n",
 			       pingroup_name(pingroup), tri_name(func), err);
 	}
 }

 void tegra_pinmux_config_table(const struct tegra_pingroup_config *config, int len)
 {
 	int i;

 	for (i = 0; i < len; i++)
 		tegra_pinmux_config_pingroup(&config[i]);
 }

 static const char *drive_pinmux_name(enum tegra_drive_pingroup pg)
 {
 	if (pg < 0 || pg >=  TEGRA_MAX_DRIVE_PINGROUP)
 		return "<UNKNOWN>";

 	return drive_pingroups[pg].name;
 }

 static const char *enable_name(unsigned long val)
 {
 	return val ? "ENABLE" : "DISABLE";
 }

 static const char *drive_name(unsigned long val)
 {
 	if (val >= TEGRA_MAX_DRIVE)
 		return "<UNKNOWN>";

 	return tegra_drive_names[val];
 }

 static const char *slew_name(unsigned long val)
 {
 	if (val >= TEGRA_MAX_SLEW)
 		return "<UNKNOWN>";

 	return tegra_slew_names[val];
 }

 static int tegra_drive_pinmux_set_hsm(enum tegra_drive_pingroup pg,
 	enum tegra_hsm hsm)
 {
 	unsigned long flags;
 	u32 reg;
 	if (pg < 0 || pg >=  TEGRA_MAX_DRIVE_PINGROUP)
 		return -ERANGE;

 	if (hsm != TEGRA_HSM_ENABLE && hsm != TEGRA_HSM_DISABLE)
 		return -EINVAL;

 	spin_lock_irqsave(&mux_lock, flags);

 	reg = pg_readl(drive_pingroups[pg].reg);
 	if (hsm == TEGRA_HSM_ENABLE)
 		reg |= (1 << 2);
 	else
 		reg &= ~(1 << 2);
 	pg_writel(reg, drive_pingroups[pg].reg);

 	spin_unlock_irqrestore(&mux_lock, flags);

 	return 0;
 }

 static int tegra_drive_pinmux_set_schmitt(enum tegra_drive_pingroup pg,
 	enum tegra_schmitt schmitt)
 {
 	unsigned long flags;
 	u32 reg;
 	if (pg < 0 || pg >=  TEGRA_MAX_DRIVE_PINGROUP)
 		return -ERANGE;

 	if (schmitt != TEGRA_SCHMITT_ENABLE && schmitt != TEGRA_SCHMITT_DISABLE)
 		return -EINVAL;

 	spin_lock_irqsave(&mux_lock, flags);

 	reg = pg_readl(drive_pingroups[pg].reg);
 	if (schmitt == TEGRA_SCHMITT_ENABLE)
 		reg |= (1 << 3);
 	else
 		reg &= ~(1 << 3);
 	pg_writel(reg, drive_pingroups[pg].reg);

 	spin_unlock_irqrestore(&mux_lock, flags);

 	return 0;
 }

 static int tegra_drive_pinmux_set_drive(enum tegra_drive_pingroup pg,
 	enum tegra_drive drive)
 {
 	unsigned long flags;
 	u32 reg;
 	if (pg < 0 || pg >=  TEGRA_MAX_DRIVE_PINGROUP)
 		return -ERANGE;

 	if (drive < 0 || drive >= TEGRA_MAX_DRIVE)
 		return -EINVAL;

 	spin_lock_irqsave(&mux_lock, flags);

 	reg = pg_readl(drive_pingroups[pg].reg);
 	reg &= ~(0x3 << 4);
 	reg |= drive << 4;
 	pg_writel(reg, drive_pingroups[pg].reg);

 	spin_unlock_irqrestore(&mux_lock, flags);

 	return 0;
 }

 static int tegra_drive_pinmux_set_pull_down(enum tegra_drive_pingroup pg,
 	enum tegra_pull_strength pull_down)
 {
 	unsigned long flags;
 	u32 reg;
 	if (pg < 0 || pg >=  TEGRA_MAX_DRIVE_PINGROUP)
 		return -ERANGE;

 	if (pull_down < 0 || pull_down >= TEGRA_MAX_PULL)
 		return -EINVAL;

 	spin_lock_irqsave(&mux_lock, flags);

 	reg = pg_readl(drive_pingroups[pg].reg);
 	reg &= ~(0x1f << 12);
 	reg |= pull_down << 12;
 	pg_writel(reg, drive_pingroups[pg].reg);

 	spin_unlock_irqrestore(&mux_lock, flags);

 	return 0;
 }

 static int tegra_drive_pinmux_set_pull_up(enum tegra_drive_pingroup pg,
 	enum tegra_pull_strength pull_up)
 {
 	unsigned long flags;
 	u32 reg;
 	if (pg < 0 || pg >=  TEGRA_MAX_DRIVE_PINGROUP)
 		return -ERANGE;

 	if (pull_up < 0 || pull_up >= TEGRA_MAX_PULL)
 		return -EINVAL;

 	spin_lock_irqsave(&mux_lock, flags);

 	reg = pg_readl(drive_pingroups[pg].reg);
 	reg &= ~(0x1f << 12);
 	reg |= pull_up << 12;
 	pg_writel(reg, drive_pingroups[pg].reg);

 	spin_unlock_irqrestore(&mux_lock, flags);

 	return 0;
 }

 static int tegra_drive_pinmux_set_slew_rising(enum tegra_drive_pingroup pg,
 	enum tegra_slew slew_rising)
 {
 	unsigned long flags;
 	u32 reg;
 	if (pg < 0 || pg >=  TEGRA_MAX_DRIVE_PINGROUP)
 		return -ERANGE;

 	if (slew_rising < 0 || slew_rising >= TEGRA_MAX_SLEW)
 		return -EINVAL;

 	spin_lock_irqsave(&mux_lock, flags);

 	reg = pg_readl(drive_pingroups[pg].reg);
 	reg &= ~(0x3 << 28);
 	reg |= slew_rising << 28;
 	pg_writel(reg, drive_pingroups[pg].reg);

 	spin_unlock_irqrestore(&mux_lock, flags);

 	return 0;
 }

 static int tegra_drive_pinmux_set_slew_falling(enum tegra_drive_pingroup pg,
 	enum tegra_slew slew_falling)
 {
 	unsigned long flags;
 	u32 reg;
 	if (pg < 0 || pg >=  TEGRA_MAX_DRIVE_PINGROUP)
 		return -ERANGE;

 	if (slew_falling < 0 || slew_falling >= TEGRA_MAX_SLEW)
 		return -EINVAL;

 	spin_lock_irqsave(&mux_lock, flags);

 	reg = pg_readl(drive_pingroups[pg].reg);
 	reg &= ~(0x3 << 30);
 	reg |= slew_falling << 30;
 	pg_writel(reg, drive_pingroups[pg].reg);

 	spin_unlock_irqrestore(&mux_lock, flags);

 	return 0;
 }

 static void tegra_drive_pinmux_config_pingroup(enum tegra_drive_pingroup pingroup,
 					  enum tegra_hsm hsm,
 					  enum tegra_schmitt schmitt,
 					  enum tegra_drive drive,
 					  enum tegra_pull_strength pull_down,
 					  enum tegra_pull_strength pull_up,
 					  enum tegra_slew slew_rising,
 					  enum tegra_slew slew_falling)
 {
 	int err;

 	err = tegra_drive_pinmux_set_hsm(pingroup, hsm);
 	if (err < 0)
 		pr_err("pinmux: can't set pingroup %s hsm to %s: %d\n",
 			drive_pinmux_name(pingroup),
 			enable_name(hsm), err);

 	err = tegra_drive_pinmux_set_schmitt(pingroup, schmitt);
 	if (err < 0)
 		pr_err("pinmux: can't set pingroup %s schmitt to %s: %d\n",
 			drive_pinmux_name(pingroup),
 			enable_name(schmitt), err);

 	err = tegra_drive_pinmux_set_drive(pingroup, drive);
 	if (err < 0)
 		pr_err("pinmux: can't set pingroup %s drive to %s: %d\n",
 			drive_pinmux_name(pingroup),
 			drive_name(drive), err);

 	err = tegra_drive_pinmux_set_pull_down(pingroup, pull_down);
 	if (err < 0)
 		pr_err("pinmux: can't set pingroup %s pull down to %d: %d\n",
 			drive_pinmux_name(pingroup),
 			pull_down, err);

 	err = tegra_drive_pinmux_set_pull_up(pingroup, pull_up);
 	if (err < 0)
 		pr_err("pinmux: can't set pingroup %s pull up to %d: %d\n",
 			drive_pinmux_name(pingroup),
 			pull_up, err);

 	err = tegra_drive_pinmux_set_slew_rising(pingroup, slew_rising);
 	if (err < 0)
 		pr_err("pinmux: can't set pingroup %s rising slew to %s: %d\n",
 			drive_pinmux_name(pingroup),
 			slew_name(slew_rising), err);

 	err = tegra_drive_pinmux_set_slew_falling(pingroup, slew_falling);
 	if (err < 0)
 		pr_err("pinmux: can't set pingroup %s falling slew to %s: %d\n",
 			drive_pinmux_name(pingroup),
 			slew_name(slew_falling), err);
 }

 void tegra_drive_pinmux_config_table(struct tegra_drive_pingroup_config *config,
 	int len)
 {
 	int i;

 	for (i = 0; i < len; i++)
 		tegra_drive_pinmux_config_pingroup(config[i].pingroup,
 						     config[i].hsm,
 						     config[i].schmitt,
 						     config[i].drive,
 						     config[i].pull_down,
 						     config[i].pull_up,
 						     config[i].slew_rising,
 						     config[i].slew_falling);
 }

 void tegra_pinmux_set_safe_pinmux_table(const struct tegra_pingroup_config *config,
 	int len)
 {
 	int i;
 	struct tegra_pingroup_config c;

 	for (i = 0; i < len; i++) {
 		int err;
 		c = config[i];
 		if (c.pingroup < 0 || c.pingroup >= TEGRA_MAX_PINGROUP) {
 			WARN_ON(1);
 			continue;
 		}
 		c.func = pingroups[c.pingroup].func_safe;
 		err = tegra_pinmux_set_func(&c);
 		if (err < 0)
 			pr_err("%s: tegra_pinmux_set_func returned %d setting "
 			       "%s to %s\n", __func__, err,
 			       pingroup_name(c.pingroup), func_name(c.func));
 	}
 }

 void tegra_pinmux_config_pinmux_table(const struct tegra_pingroup_config *config,
 	int len)
 {
 	int i;

 	for (i = 0; i < len; i++) {
 		int err;
 		if (config[i].pingroup < 0 ||
 		    config[i].pingroup >= TEGRA_MAX_PINGROUP) {
 			WARN_ON(1);
 			continue;
 		}
 		err = tegra_pinmux_set_func(&config[i]);
 		if (err < 0)
 			pr_err("%s: tegra_pinmux_set_func returned %d setting "
 			       "%s to %s\n", __func__, err,
 			       pingroup_name(config[i].pingroup),
 			       func_name(config[i].func));
 	}
 }

 void tegra_pinmux_config_tristate_table(const struct tegra_pingroup_config *config,
 	int len, enum tegra_tristate tristate)
 {
 	int i;
 	int err;
 	enum tegra_pingroup pingroup;

 	for (i = 0; i < len; i++) {
 		pingroup = config[i].pingroup;
 		if (pingroups[pingroup].tri_reg >= 0) {
 			err = tegra_pinmux_set_tristate(pingroup, tristate);
 			if (err < 0)
 				pr_err("pinmux: can't set pingroup %s tristate"
 					" to %s: %d\n",	pingroup_name(pingroup),
 					tri_name(tristate), err);
 		}
 	}
 }

 void tegra_pinmux_config_pullupdown_table(const struct tegra_pingroup_config *config,
 	int len, enum tegra_pullupdown pupd)
 {
 	int i;
 	int err;
 	enum tegra_pingroup pingroup;

 	for (i = 0; i < len; i++) {
 		pingroup = config[i].pingroup;
 		if (pingroups[pingroup].pupd_reg >= 0) {
 			err = tegra_pinmux_set_pullupdown(pingroup, pupd);
 			if (err < 0)
 				pr_err("pinmux: can't set pingroup %s pullupdown"
 					" to %s: %d\n",	pingroup_name(pingroup),
 					pupd_name(pupd), err);
 		}
 	}
 }

 #ifdef	CONFIG_DEBUG_FS

 #include <linux/debugfs.h>
 #include <linux/seq_file.h>

 static void dbg_pad_field(struct seq_file *s, int len)
 {
 	seq_putc(s, ',');

 	while (len-- > -1)
 		seq_putc(s, ' ');
 }

 static int dbg_pinmux_show(struct seq_file *s, void *unused)
 {
 	int i;
 	int len;

 	for (i = 0; i < TEGRA_MAX_PINGROUP; i++) {
 		unsigned long tri;
 		unsigned long mux;
 		unsigned long pupd;

 		seq_printf(s, "\t{TEGRA_PINGROUP_%s", pingroups[i].name);
 		len = strlen(pingroups[i].name);
 		dbg_pad_field(s, 5 - len);

 		if (pingroups[i].mux_reg < 0) {
 			seq_printf(s, "TEGRA_MUX_NONE");
 			len = strlen("NONE");
 		} else {
 			mux = (pg_readl(pingroups[i].mux_reg) >>
 			       pingroups[i].mux_bit) & 0x3;
 			if (pingroups[i].funcs[mux] == TEGRA_MUX_RSVD) {
 				seq_printf(s, "TEGRA_MUX_RSVD%1lu", mux+1);
 				len = 5;
 			} else {
 				seq_printf(s, "TEGRA_MUX_%s",
 					   tegra_mux_names[pingroups[i].funcs[mux]]);
 				len = strlen(tegra_mux_names[pingroups[i].funcs[mux]]);
 			}
 		}
 		dbg_pad_field(s, 13-len);

 		if (pingroups[i].pupd_reg < 0) {
 			seq_printf(s, "TEGRA_PUPD_NORMAL");
 			len = strlen("NORMAL");
 		} else {
 			pupd = (pg_readl(pingroups[i].pupd_reg) >>
 				pingroups[i].pupd_bit) & 0x3;
 			seq_printf(s, "TEGRA_PUPD_%s", pupd_name(pupd));
 			len = strlen(pupd_name(pupd));
 		}
 		dbg_pad_field(s, 9 - len);

 		if (pingroups[i].tri_reg < 0) {
 			seq_printf(s, "TEGRA_TRI_NORMAL");
 		} else {
 			tri = (pg_readl(pingroups[i].tri_reg) >>
 			       pingroups[i].tri_bit) & 0x1;

 			seq_printf(s, "TEGRA_TRI_%s", tri_name(tri));
 		}
 		seq_printf(s, "},\n");
 	}
 	return 0;
 }

 static int dbg_pinmux_open(struct inode *inode, struct file *file)
 {
 	return single_open(file, dbg_pinmux_show, &inode->i_private);
 }

 static const struct file_operations debug_fops = {
 	.open		= dbg_pinmux_open,
 	.read		= seq_read,
 	.llseek		= seq_lseek,
 	.release	= single_release,
 };

 static int dbg_drive_pinmux_show(struct seq_file *s, void *unused)
 {
 	int i;
 	int len;

 	for (i = 0; i < TEGRA_MAX_DRIVE_PINGROUP; i++) {
 		u32 reg;

 		seq_printf(s, "\t{TEGRA_DRIVE_PINGROUP_%s",
 			drive_pingroups[i].name);
 		len = strlen(drive_pingroups[i].name);
 		dbg_pad_field(s, 7 - len);


 		reg = pg_readl(drive_pingroups[i].reg);
 		if (HSM_EN(reg)) {
 			seq_printf(s, "TEGRA_HSM_ENABLE");
 			len = 16;
 		} else {
 			seq_printf(s, "TEGRA_HSM_DISABLE");
 			len = 17;
 		}
 		dbg_pad_field(s, 17 - len);

 		if (SCHMT_EN(reg)) {
 			seq_printf(s, "TEGRA_SCHMITT_ENABLE");
 			len = 21;
 		} else {
 			seq_printf(s, "TEGRA_SCHMITT_DISABLE");
 			len = 22;
 		}
 		dbg_pad_field(s, 22 - len);

 		seq_printf(s, "TEGRA_DRIVE_%s", drive_name(LPMD(reg)));
 		len = strlen(drive_name(LPMD(reg)));
 		dbg_pad_field(s, 5 - len);

 		seq_printf(s, "TEGRA_PULL_%d", DRVDN(reg));
 		len = DRVDN(reg) < 10 ? 1 : 2;
 		dbg_pad_field(s, 2 - len);

 		seq_printf(s, "TEGRA_PULL_%d", DRVUP(reg));
 		len = DRVUP(reg) < 10 ? 1 : 2;
 		dbg_pad_field(s, 2 - len);

 		seq_printf(s, "TEGRA_SLEW_%s", slew_name(SLWR(reg)));
 		len = strlen(slew_name(SLWR(reg)));
 		dbg_pad_field(s, 7 - len);

 		seq_printf(s, "TEGRA_SLEW_%s", slew_name(SLWF(reg)));

 		seq_printf(s, "},\n");
 	}
 	return 0;
 }

 static int dbg_drive_pinmux_open(struct inode *inode, struct file *file)
 {
 	return single_open(file, dbg_drive_pinmux_show, &inode->i_private);
 }

 static const struct file_operations debug_drive_fops = {
 	.open		= dbg_drive_pinmux_open,
 	.read		= seq_read,
 	.llseek		= seq_lseek,
 	.release	= single_release,
 };

 static int __init tegra_pinmux_debuginit(void)
 {
 	(void) debugfs_create_file("tegra_pinmux", S_IRUGO,
 					NULL, NULL, &debug_fops);
 	(void) debugfs_create_file("tegra_pinmux_drive", S_IRUGO,
 					NULL, NULL, &debug_drive_fops);
 	return 0;
 }
 late_initcall(tegra_pinmux_debuginit);
 #endif
	/*
	* linux/arch/arm/mach-tegra/pinmux.c
	*
	* Copyright (C) 2010 Google, Inc.
	*
	* This software is licensed under the terms of the GNU General Public
	* License version 2, as published by the Free Software Foundation, and
	* may be copied, distributed, and modified under those terms.
	*
	* This program is distributed in the hope that it will be useful,
	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	* GNU General Public License for more details.
	*
	*/

	#include <linux/init.h>
	#include <linux/module.h>
	#include <linux/kernel.h>
	#include <linux/errno.h>
	#include <linux/spinlock.h>
	#include <linux/io.h>

	#include <mach/iomap.h>
	#include <mach/pinmux.h>

	#define HSM_EN(reg) (((reg) >> 2) & 0x1)
	#define SCHMT_EN(reg) (((reg) >> 3) & 0x1)
	#define LPMD(reg) (((reg) >> 4) & 0x3)
	#define DRVDN(reg) (((reg) >> 12) & 0x1f)
	#define DRVUP(reg) (((reg) >> 20) & 0x1f)
	#define SLWR(reg) (((reg) >> 28) & 0x3)
	#define SLWF(reg) (((reg) >> 30) & 0x3)

	static const struct tegra_pingroup_desc *const pingroups = tegra_soc_pingroups;
	static const struct tegra_drive_pingroup_desc *const drive_pingroups = tegra_soc_drive_pingroups;

	static char *tegra_mux_names[TEGRA_MAX_MUX] = {
	[TEGRA_MUX_AHB_CLK] = "AHB_CLK",
	[TEGRA_MUX_APB_CLK] = "APB_CLK",
	[TEGRA_MUX_AUDIO_SYNC] = "AUDIO_SYNC",
	[TEGRA_MUX_CRT] = "CRT",
	[TEGRA_MUX_DAP1] = "DAP1",
	[TEGRA_MUX_DAP2] = "DAP2",
	[TEGRA_MUX_DAP3] = "DAP3",
	[TEGRA_MUX_DAP4] = "DAP4",
	[TEGRA_MUX_DAP5] = "DAP5",
	[TEGRA_MUX_DISPLAYA] = "DISPLAYA",
	[TEGRA_MUX_DISPLAYB] = "DISPLAYB",
	[TEGRA_MUX_EMC_TEST0_DLL] = "EMC_TEST0_DLL",
	[TEGRA_MUX_EMC_TEST1_DLL] = "EMC_TEST1_DLL",
	[TEGRA_MUX_GMI] = "GMI",
	[TEGRA_MUX_GMI_INT] = "GMI_INT",
	[TEGRA_MUX_HDMI] = "HDMI",
	[TEGRA_MUX_I2C] = "I2C",
	[TEGRA_MUX_I2C2] = "I2C2",
	[TEGRA_MUX_I2C3] = "I2C3",
	[TEGRA_MUX_IDE] = "IDE",
	[TEGRA_MUX_IRDA] = "IRDA",
	[TEGRA_MUX_KBC] = "KBC",
	[TEGRA_MUX_MIO] = "MIO",
	[TEGRA_MUX_MIPI_HS] = "MIPI_HS",
	[TEGRA_MUX_NAND] = "NAND",
	[TEGRA_MUX_OSC] = "OSC",
	[TEGRA_MUX_OWR] = "OWR",
	[TEGRA_MUX_PCIE] = "PCIE",
	[TEGRA_MUX_PLLA_OUT] = "PLLA_OUT",
	[TEGRA_MUX_PLLC_OUT1] = "PLLC_OUT1",
	[TEGRA_MUX_PLLM_OUT1] = "PLLM_OUT1",
	[TEGRA_MUX_PLLP_OUT2] = "PLLP_OUT2",
	[TEGRA_MUX_PLLP_OUT3] = "PLLP_OUT3",
	[TEGRA_MUX_PLLP_OUT4] = "PLLP_OUT4",
	[TEGRA_MUX_PWM] = "PWM",
	[TEGRA_MUX_PWR_INTR] = "PWR_INTR",
	[TEGRA_MUX_PWR_ON] = "PWR_ON",
	[TEGRA_MUX_RTCK] = "RTCK",
	[TEGRA_MUX_SDIO1] = "SDIO1",
	[TEGRA_MUX_SDIO2] = "SDIO2",
	[TEGRA_MUX_SDIO3] = "SDIO3",
	[TEGRA_MUX_SDIO4] = "SDIO4",
	[TEGRA_MUX_SFLASH] = "SFLASH",
	[TEGRA_MUX_SPDIF] = "SPDIF",
	[TEGRA_MUX_SPI1] = "SPI1",
	[TEGRA_MUX_SPI2] = "SPI2",
	[TEGRA_MUX_SPI2_ALT] = "SPI2_ALT",
	[TEGRA_MUX_SPI3] = "SPI3",
	[TEGRA_MUX_SPI4] = "SPI4",
	[TEGRA_MUX_TRACE] = "TRACE",
	[TEGRA_MUX_TWC] = "TWC",
	[TEGRA_MUX_UARTA] = "UARTA",
	[TEGRA_MUX_UARTB] = "UARTB",
	[TEGRA_MUX_UARTC] = "UARTC",
	[TEGRA_MUX_UARTD] = "UARTD",
	[TEGRA_MUX_UARTE] = "UARTE",
	[TEGRA_MUX_ULPI] = "ULPI",
	[TEGRA_MUX_VI] = "VI",
	[TEGRA_MUX_VI_SENSOR_CLK] = "VI_SENSOR_CLK",
	[TEGRA_MUX_XIO] = "XIO",
	[TEGRA_MUX_SAFE] = "<safe>",
	};

	static const char *tegra_drive_names[TEGRA_MAX_DRIVE] = {
	[TEGRA_DRIVE_DIV_8] = "DIV_8",
	[TEGRA_DRIVE_DIV_4] = "DIV_4",
	[TEGRA_DRIVE_DIV_2] = "DIV_2",
	[TEGRA_DRIVE_DIV_1] = "DIV_1",
	};

	static const char *tegra_slew_names[TEGRA_MAX_SLEW] = {
	[TEGRA_SLEW_FASTEST] = "FASTEST",
	[TEGRA_SLEW_FAST] = "FAST",
	[TEGRA_SLEW_SLOW] = "SLOW",
	[TEGRA_SLEW_SLOWEST] = "SLOWEST",
	};

	static DEFINE_SPINLOCK(mux_lock);

	static const char *pingroup_name(enum tegra_pingroup pg)
	{
	if (pg < 0 \|\| pg >= TEGRA_MAX_PINGROUP)
	return "<UNKNOWN>";

	return pingroups[pg].name;
	}

	static const char *func_name(enum tegra_mux_func func)
	{
	if (func == TEGRA_MUX_RSVD1)
	return "RSVD1";

	if (func == TEGRA_MUX_RSVD2)
	return "RSVD2";

	if (func == TEGRA_MUX_RSVD3)
	return "RSVD3";

	if (func == TEGRA_MUX_RSVD4)
	return "RSVD4";

	if (func == TEGRA_MUX_NONE)
	return "NONE";

	if (func < 0 \|\| func >= TEGRA_MAX_MUX)
	return "<UNKNOWN>";

	return tegra_mux_names[func];
	}


	static const char *tri_name(unsigned long val)
	{
	return val ? "TRISTATE" : "NORMAL";
	}

	static const char *pupd_name(unsigned long val)
	{
	switch (val) {
	case 0:
	return "NORMAL";

	case 1:
	return "PULL_DOWN";

	case 2:
	return "PULL_UP";

	default:
	return "RSVD";
	}
	}


	static inline unsigned long pg_readl(unsigned long offset)
	{
	return readl(IO_TO_VIRT(TEGRA_APB_MISC_BASE + offset));
	}

	static inline void pg_writel(unsigned long value, unsigned long offset)
	{
	writel(value, IO_TO_VIRT(TEGRA_APB_MISC_BASE + offset));
	}

	static int tegra_pinmux_set_func(const struct tegra_pingroup_config *config)
	{
	int mux = -1;
	int i;
	unsigned long reg;
	unsigned long flags;
	enum tegra_pingroup pg = config->pingroup;
	enum tegra_mux_func func = config->func;

	if (pg < 0 \|\| pg >= TEGRA_MAX_PINGROUP)
	return -ERANGE;

	if (pingroups[pg].mux_reg < 0)
	return -EINVAL;

	if (func < 0)
	return -ERANGE;

	if (func == TEGRA_MUX_SAFE)
	func = pingroups[pg].func_safe;

	if (func & TEGRA_MUX_RSVD) {
	mux = func & 0x3;
	} else {
	for (i = 0; i < 4; i++) {
	if (pingroups[pg].funcs[i] == func) {
	mux = i;
	break;
	}
	}
	}

	if (mux < 0)
	return -EINVAL;

	spin_lock_irqsave(&mux_lock, flags);

	reg = pg_readl(pingroups[pg].mux_reg);
	reg &= ~(0x3 << pingroups[pg].mux_bit);
	reg \|= mux << pingroups[pg].mux_bit;
	pg_writel(reg, pingroups[pg].mux_reg);

	spin_unlock_irqrestore(&mux_lock, flags);

	return 0;
	}

	int tegra_pinmux_set_tristate(enum tegra_pingroup pg,
	enum tegra_tristate tristate)
	{
	unsigned long reg;
	unsigned long flags;

	if (pg < 0 \|\| pg >= TEGRA_MAX_PINGROUP)
	return -ERANGE;

	if (pingroups[pg].tri_reg < 0)
	return -EINVAL;

	spin_lock_irqsave(&mux_lock, flags);

	reg = pg_readl(pingroups[pg].tri_reg);
	reg &= ~(0x1 << pingroups[pg].tri_bit);
	if (tristate)
	reg \|= 1 << pingroups[pg].tri_bit;
	pg_writel(reg, pingroups[pg].tri_reg);

	spin_unlock_irqrestore(&mux_lock, flags);

	return 0;
	}

	int tegra_pinmux_set_pullupdown(enum tegra_pingroup pg,
	enum tegra_pullupdown pupd)
	{
	unsigned long reg;
	unsigned long flags;

	if (pg < 0 \|\| pg >= TEGRA_MAX_PINGROUP)
	return -ERANGE;

	if (pingroups[pg].pupd_reg < 0)
	return -EINVAL;

	if (pupd != TEGRA_PUPD_NORMAL &&
	pupd != TEGRA_PUPD_PULL_DOWN &&
	pupd != TEGRA_PUPD_PULL_UP)
	return -EINVAL;


	spin_lock_irqsave(&mux_lock, flags);

	reg = pg_readl(pingroups[pg].pupd_reg);
	reg &= ~(0x3 << pingroups[pg].pupd_bit);
	reg \|= pupd << pingroups[pg].pupd_bit;
	pg_writel(reg, pingroups[pg].pupd_reg);

	spin_unlock_irqrestore(&mux_lock, flags);

	return 0;
	}

	static void tegra_pinmux_config_pingroup(const struct tegra_pingroup_config *config)
	{
	enum tegra_pingroup pingroup = config->pingroup;
	enum tegra_mux_func func = config->func;
	enum tegra_pullupdown pupd = config->pupd;
	enum tegra_tristate tristate = config->tristate;
	int err;

	if (pingroups[pingroup].mux_reg >= 0) {
	err = tegra_pinmux_set_func(config);
	if (err < 0)
	pr_err("pinmux: can't set pingroup %s func to %s: %d\n",
	pingroup_name(pingroup), func_name(func), err);
	}

	if (pingroups[pingroup].pupd_reg >= 0) {
	err = tegra_pinmux_set_pullupdown(pingroup, pupd);
	if (err < 0)
	pr_err("pinmux: can't set pingroup %s pullupdown to %s: %d\n",
	pingroup_name(pingroup), pupd_name(pupd), err);
	}

	if (pingroups[pingroup].tri_reg >= 0) {
	err = tegra_pinmux_set_tristate(pingroup, tristate);
	if (err < 0)
	pr_err("pinmux: can't set pingroup %s tristate to %s: %d\n",
	pingroup_name(pingroup), tri_name(func), err);
	}
	}

	void tegra_pinmux_config_table(const struct tegra_pingroup_config *config, int len)
	{
	int i;

	for (i = 0; i < len; i++)
	tegra_pinmux_config_pingroup(&config[i]);
	}

	static const char *drive_pinmux_name(enum tegra_drive_pingroup pg)
	{
	if (pg < 0 \|\| pg >= TEGRA_MAX_DRIVE_PINGROUP)
	return "<UNKNOWN>";

	return drive_pingroups[pg].name;
	}

	static const char *enable_name(unsigned long val)
	{
	return val ? "ENABLE" : "DISABLE";
	}

	static const char *drive_name(unsigned long val)
	{
	if (val >= TEGRA_MAX_DRIVE)
	return "<UNKNOWN>";

	return tegra_drive_names[val];
	}

	static const char *slew_name(unsigned long val)
	{
	if (val >= TEGRA_MAX_SLEW)
	return "<UNKNOWN>";

	return tegra_slew_names[val];
	}

	static int tegra_drive_pinmux_set_hsm(enum tegra_drive_pingroup pg,
	enum tegra_hsm hsm)
	{
	unsigned long flags;
	u32 reg;
	if (pg < 0 \|\| pg >= TEGRA_MAX_DRIVE_PINGROUP)
	return -ERANGE;

	if (hsm != TEGRA_HSM_ENABLE && hsm != TEGRA_HSM_DISABLE)
	return -EINVAL;

	spin_lock_irqsave(&mux_lock, flags);

	reg = pg_readl(drive_pingroups[pg].reg);
	if (hsm == TEGRA_HSM_ENABLE)
	reg \|= (1 << 2);
	else
	reg &= ~(1 << 2);
	pg_writel(reg, drive_pingroups[pg].reg);

	spin_unlock_irqrestore(&mux_lock, flags);

	return 0;
	}

	static int tegra_drive_pinmux_set_schmitt(enum tegra_drive_pingroup pg,
	enum tegra_schmitt schmitt)
	{
	unsigned long flags;
	u32 reg;
	if (pg < 0 \|\| pg >= TEGRA_MAX_DRIVE_PINGROUP)
	return -ERANGE;

	if (schmitt != TEGRA_SCHMITT_ENABLE && schmitt != TEGRA_SCHMITT_DISABLE)
	return -EINVAL;

	spin_lock_irqsave(&mux_lock, flags);

	reg = pg_readl(drive_pingroups[pg].reg);
	if (schmitt == TEGRA_SCHMITT_ENABLE)
	reg \|= (1 << 3);
	else
	reg &= ~(1 << 3);
	pg_writel(reg, drive_pingroups[pg].reg);

	spin_unlock_irqrestore(&mux_lock, flags);

	return 0;
	}

	static int tegra_drive_pinmux_set_drive(enum tegra_drive_pingroup pg,
	enum tegra_drive drive)
	{
	unsigned long flags;
	u32 reg;
	if (pg < 0 \|\| pg >= TEGRA_MAX_DRIVE_PINGROUP)
	return -ERANGE;

	if (drive < 0 \|\| drive >= TEGRA_MAX_DRIVE)
	return -EINVAL;

	spin_lock_irqsave(&mux_lock, flags);

	reg = pg_readl(drive_pingroups[pg].reg);
	reg &= ~(0x3 << 4);
	reg \|= drive << 4;
	pg_writel(reg, drive_pingroups[pg].reg);

	spin_unlock_irqrestore(&mux_lock, flags);

	return 0;
	}

	static int tegra_drive_pinmux_set_pull_down(enum tegra_drive_pingroup pg,
	enum tegra_pull_strength pull_down)
	{
	unsigned long flags;
	u32 reg;
	if (pg < 0 \|\| pg >= TEGRA_MAX_DRIVE_PINGROUP)
	return -ERANGE;

	if (pull_down < 0 \|\| pull_down >= TEGRA_MAX_PULL)
	return -EINVAL;

	spin_lock_irqsave(&mux_lock, flags);

	reg = pg_readl(drive_pingroups[pg].reg);
	reg &= ~(0x1f << 12);
	reg \|= pull_down << 12;
	pg_writel(reg, drive_pingroups[pg].reg);

	spin_unlock_irqrestore(&mux_lock, flags);

	return 0;
	}

	static int tegra_drive_pinmux_set_pull_up(enum tegra_drive_pingroup pg,
	enum tegra_pull_strength pull_up)
	{
	unsigned long flags;
	u32 reg;
	if (pg < 0 \|\| pg >= TEGRA_MAX_DRIVE_PINGROUP)
	return -ERANGE;

	if (pull_up < 0 \|\| pull_up >= TEGRA_MAX_PULL)
	return -EINVAL;

	spin_lock_irqsave(&mux_lock, flags);

	reg = pg_readl(drive_pingroups[pg].reg);
	reg &= ~(0x1f << 12);
	reg \|= pull_up << 12;
	pg_writel(reg, drive_pingroups[pg].reg);

	spin_unlock_irqrestore(&mux_lock, flags);

	return 0;
	}

	static int tegra_drive_pinmux_set_slew_rising(enum tegra_drive_pingroup pg,
	enum tegra_slew slew_rising)
	{
	unsigned long flags;
	u32 reg;
	if (pg < 0 \|\| pg >= TEGRA_MAX_DRIVE_PINGROUP)
	return -ERANGE;

	if (slew_rising < 0 \|\| slew_rising >= TEGRA_MAX_SLEW)
	return -EINVAL;

	spin_lock_irqsave(&mux_lock, flags);

	reg = pg_readl(drive_pingroups[pg].reg);
	reg &= ~(0x3 << 28);
	reg \|= slew_rising << 28;
	pg_writel(reg, drive_pingroups[pg].reg);

	spin_unlock_irqrestore(&mux_lock, flags);

	return 0;
	}

	static int tegra_drive_pinmux_set_slew_falling(enum tegra_drive_pingroup pg,
	enum tegra_slew slew_falling)
	{
	unsigned long flags;
	u32 reg;
	if (pg < 0 \|\| pg >= TEGRA_MAX_DRIVE_PINGROUP)
	return -ERANGE;

	if (slew_falling < 0 \|\| slew_falling >= TEGRA_MAX_SLEW)
	return -EINVAL;

	spin_lock_irqsave(&mux_lock, flags);

	reg = pg_readl(drive_pingroups[pg].reg);
	reg &= ~(0x3 << 30);
	reg \|= slew_falling << 30;
	pg_writel(reg, drive_pingroups[pg].reg);

	spin_unlock_irqrestore(&mux_lock, flags);

	return 0;
	}

	static void tegra_drive_pinmux_config_pingroup(enum tegra_drive_pingroup pingroup,
	enum tegra_hsm hsm,
	enum tegra_schmitt schmitt,
	enum tegra_drive drive,
	enum tegra_pull_strength pull_down,
	enum tegra_pull_strength pull_up,
	enum tegra_slew slew_rising,
	enum tegra_slew slew_falling)
	{
	int err;

	err = tegra_drive_pinmux_set_hsm(pingroup, hsm);
	if (err < 0)
	pr_err("pinmux: can't set pingroup %s hsm to %s: %d\n",
	drive_pinmux_name(pingroup),
	enable_name(hsm), err);

	err = tegra_drive_pinmux_set_schmitt(pingroup, schmitt);
	if (err < 0)
	pr_err("pinmux: can't set pingroup %s schmitt to %s: %d\n",
	drive_pinmux_name(pingroup),
	enable_name(schmitt), err);

	err = tegra_drive_pinmux_set_drive(pingroup, drive);
	if (err < 0)
	pr_err("pinmux: can't set pingroup %s drive to %s: %d\n",
	drive_pinmux_name(pingroup),
	drive_name(drive), err);

	err = tegra_drive_pinmux_set_pull_down(pingroup, pull_down);
	if (err < 0)
	pr_err("pinmux: can't set pingroup %s pull down to %d: %d\n",
	drive_pinmux_name(pingroup),
	pull_down, err);

	err = tegra_drive_pinmux_set_pull_up(pingroup, pull_up);
	if (err < 0)
	pr_err("pinmux: can't set pingroup %s pull up to %d: %d\n",
	drive_pinmux_name(pingroup),
	pull_up, err);

	err = tegra_drive_pinmux_set_slew_rising(pingroup, slew_rising);
	if (err < 0)
	pr_err("pinmux: can't set pingroup %s rising slew to %s: %d\n",
	drive_pinmux_name(pingroup),
	slew_name(slew_rising), err);

	err = tegra_drive_pinmux_set_slew_falling(pingroup, slew_falling);
	if (err < 0)
	pr_err("pinmux: can't set pingroup %s falling slew to %s: %d\n",
	drive_pinmux_name(pingroup),
	slew_name(slew_falling), err);
	}

	void tegra_drive_pinmux_config_table(struct tegra_drive_pingroup_config *config,
	int len)
	{
	int i;

	for (i = 0; i < len; i++)
	tegra_drive_pinmux_config_pingroup(config[i].pingroup,
	config[i].hsm,
	config[i].schmitt,
	config[i].drive,
	config[i].pull_down,
	config[i].pull_up,
	config[i].slew_rising,
	config[i].slew_falling);
	}

	void tegra_pinmux_set_safe_pinmux_table(const struct tegra_pingroup_config *config,
	int len)
	{
	int i;
	struct tegra_pingroup_config c;

	for (i = 0; i < len; i++) {
	int err;
	c = config[i];
	if (c.pingroup < 0 \|\| c.pingroup >= TEGRA_MAX_PINGROUP) {
	WARN_ON(1);
	continue;
	}
	c.func = pingroups[c.pingroup].func_safe;
	err = tegra_pinmux_set_func(&c);
	if (err < 0)
	pr_err("%s: tegra_pinmux_set_func returned %d setting "
	"%s to %s\n", __func__, err,
	pingroup_name(c.pingroup), func_name(c.func));
	}
	}

	void tegra_pinmux_config_pinmux_table(const struct tegra_pingroup_config *config,
	int len)
	{
	int i;

	for (i = 0; i < len; i++) {
	int err;
	if (config[i].pingroup < 0 \|\|
	config[i].pingroup >= TEGRA_MAX_PINGROUP) {
	WARN_ON(1);
	continue;
	}
	err = tegra_pinmux_set_func(&config[i]);
	if (err < 0)
	pr_err("%s: tegra_pinmux_set_func returned %d setting "
	"%s to %s\n", __func__, err,
	pingroup_name(config[i].pingroup),
	func_name(config[i].func));
	}
	}

	void tegra_pinmux_config_tristate_table(const struct tegra_pingroup_config *config,
	int len, enum tegra_tristate tristate)
	{
	int i;
	int err;
	enum tegra_pingroup pingroup;

	for (i = 0; i < len; i++) {
	pingroup = config[i].pingroup;
	if (pingroups[pingroup].tri_reg >= 0) {
	err = tegra_pinmux_set_tristate(pingroup, tristate);
	if (err < 0)
	pr_err("pinmux: can't set pingroup %s tristate"
	" to %s: %d\n", pingroup_name(pingroup),
	tri_name(tristate), err);
	}
	}
	}

	void tegra_pinmux_config_pullupdown_table(const struct tegra_pingroup_config *config,
	int len, enum tegra_pullupdown pupd)
	{
	int i;
	int err;
	enum tegra_pingroup pingroup;

	for (i = 0; i < len; i++) {
	pingroup = config[i].pingroup;
	if (pingroups[pingroup].pupd_reg >= 0) {
	err = tegra_pinmux_set_pullupdown(pingroup, pupd);
	if (err < 0)
	pr_err("pinmux: can't set pingroup %s pullupdown"
	" to %s: %d\n", pingroup_name(pingroup),
	pupd_name(pupd), err);
	}
	}
	}

	#ifdef CONFIG_DEBUG_FS

	#include <linux/debugfs.h>
	#include <linux/seq_file.h>

	static void dbg_pad_field(struct seq_file *s, int len)
	{
	seq_putc(s, ',');

	while (len-- > -1)
	seq_putc(s, ' ');
	}

	static int dbg_pinmux_show(struct seq_file s, void unused)
	{
	int i;
	int len;

	for (i = 0; i < TEGRA_MAX_PINGROUP; i++) {
	unsigned long tri;
	unsigned long mux;
	unsigned long pupd;

	seq_printf(s, "\t{TEGRA_PINGROUP_%s", pingroups[i].name);
	len = strlen(pingroups[i].name);
	dbg_pad_field(s, 5 - len);

	if (pingroups[i].mux_reg < 0) {
	seq_printf(s, "TEGRA_MUX_NONE");
	len = strlen("NONE");
	} else {
	mux = (pg_readl(pingroups[i].mux_reg) >>
	pingroups[i].mux_bit) & 0x3;
	if (pingroups[i].funcs[mux] == TEGRA_MUX_RSVD) {
	seq_printf(s, "TEGRA_MUX_RSVD%1lu", mux+1);
	len = 5;
	} else {
	seq_printf(s, "TEGRA_MUX_%s",
	tegra_mux_names[pingroups[i].funcs[mux]]);
	len = strlen(tegra_mux_names[pingroups[i].funcs[mux]]);
	}
	}
	dbg_pad_field(s, 13-len);

	if (pingroups[i].pupd_reg < 0) {
	seq_printf(s, "TEGRA_PUPD_NORMAL");
	len = strlen("NORMAL");
	} else {
	pupd = (pg_readl(pingroups[i].pupd_reg) >>
	pingroups[i].pupd_bit) & 0x3;
	seq_printf(s, "TEGRA_PUPD_%s", pupd_name(pupd));
	len = strlen(pupd_name(pupd));
	}
	dbg_pad_field(s, 9 - len);

	if (pingroups[i].tri_reg < 0) {
	seq_printf(s, "TEGRA_TRI_NORMAL");
	} else {
	tri = (pg_readl(pingroups[i].tri_reg) >>
	pingroups[i].tri_bit) & 0x1;

	seq_printf(s, "TEGRA_TRI_%s", tri_name(tri));
	}
	seq_printf(s, "},\n");
	}
	return 0;
	}

	static int dbg_pinmux_open(struct inode inode, struct file file)
	{
	return single_open(file, dbg_pinmux_show, &inode->i_private);
	}

	static const struct file_operations debug_fops = {
	.open = dbg_pinmux_open,
	.read = seq_read,
	.llseek = seq_lseek,
	.release = single_release,
	};

	static int dbg_drive_pinmux_show(struct seq_file s, void unused)
	{
	int i;
	int len;

	for (i = 0; i < TEGRA_MAX_DRIVE_PINGROUP; i++) {
	u32 reg;

	seq_printf(s, "\t{TEGRA_DRIVE_PINGROUP_%s",
	drive_pingroups[i].name);
	len = strlen(drive_pingroups[i].name);
	dbg_pad_field(s, 7 - len);


	reg = pg_readl(drive_pingroups[i].reg);
	if (HSM_EN(reg)) {
	seq_printf(s, "TEGRA_HSM_ENABLE");
	len = 16;
	} else {
	seq_printf(s, "TEGRA_HSM_DISABLE");
	len = 17;
	}
	dbg_pad_field(s, 17 - len);

	if (SCHMT_EN(reg)) {
	seq_printf(s, "TEGRA_SCHMITT_ENABLE");
	len = 21;
	} else {
	seq_printf(s, "TEGRA_SCHMITT_DISABLE");
	len = 22;
	}
	dbg_pad_field(s, 22 - len);

	seq_printf(s, "TEGRA_DRIVE_%s", drive_name(LPMD(reg)));
	len = strlen(drive_name(LPMD(reg)));
	dbg_pad_field(s, 5 - len);

	seq_printf(s, "TEGRA_PULL_%d", DRVDN(reg));
	len = DRVDN(reg) < 10 ? 1 : 2;
	dbg_pad_field(s, 2 - len);

	seq_printf(s, "TEGRA_PULL_%d", DRVUP(reg));
	len = DRVUP(reg) < 10 ? 1 : 2;
	dbg_pad_field(s, 2 - len);

	seq_printf(s, "TEGRA_SLEW_%s", slew_name(SLWR(reg)));
	len = strlen(slew_name(SLWR(reg)));
	dbg_pad_field(s, 7 - len);

	seq_printf(s, "TEGRA_SLEW_%s", slew_name(SLWF(reg)));

	seq_printf(s, "},\n");
	}
	return 0;
	}

	static int dbg_drive_pinmux_open(struct inode inode, struct file file)
	{
	return single_open(file, dbg_drive_pinmux_show, &inode->i_private);
	}

	static const struct file_operations debug_drive_fops = {
	.open = dbg_drive_pinmux_open,
	.read = seq_read,
	.llseek = seq_lseek,
	.release = single_release,
	};

	static int __init tegra_pinmux_debuginit(void)
	{
	(void) debugfs_create_file("tegra_pinmux", S_IRUGO,
	NULL, NULL, &debug_fops);
	(void) debugfs_create_file("tegra_pinmux_drive", S_IRUGO,
	NULL, NULL, &debug_drive_fops);
	return 0;
	}
	late_initcall(tegra_pinmux_debuginit);
	#endif