ARM: OMAP2+: Remove legacy mux code

All the boards booting with device tree use
drivers/pinctrl-single.c instead.

Note that mach-omap1 is still using the legacy mux,
so let's move the related Kconfig options from plat-omap
to mach-omap1.

Signed-off-by: Tony Lindgren <tony@atomide.com>

12 files changed, 27 insertions, 4098 deletions

diff --git a/arch/arm/mach-omap1/Kconfig b/arch/arm/mach-omap1/Kconfig
index afb809509140..45c6b733c881 100644
--- a/arch/arm/mach-omap1/Kconfig
+++ b/arch/arm/mach-omap1/Kconfig
@@ -31,6 +31,32 @@ config ARCH_OMAP16XX
 	select ARCH_OMAP_OTG
 	select CPU_ARM926T
 
+config OMAP_MUX
+	bool "OMAP multiplexing support"
+	depends on ARCH_OMAP
+	default y
+	help
+	  Pin multiplexing support for OMAP boards. If your bootloader
+	  sets the multiplexing correctly, say N. Otherwise, or if unsure,
+	  say Y.
+
+config OMAP_MUX_DEBUG
+	bool "Multiplexing debug output"
+	depends on OMAP_MUX
+	help
+	  Makes the multiplexing functions print out a lot of debug info.
+	  This is useful if you want to find out the correct values of the
+	  multiplexing registers.
+
+config OMAP_MUX_WARNINGS
+	bool "Warn about pins the bootloader didn't set up"
+	depends on OMAP_MUX
+	default y
+	help
+	  Choose Y here to warn whenever driver initialization logic needs
+	  to change the pin multiplexing setup.	 When there are no warnings
+	  printed, it's safe to deselect OMAP_MUX for your product.
+
 comment "OMAP Board Type"
 	depends on ARCH_OMAP1
 
diff --git a/arch/arm/mach-omap2/Makefile b/arch/arm/mach-omap2/Makefile
index 231b1e5cbf8c..aedfca455de3 100644
--- a/arch/arm/mach-omap2/Makefile
+++ b/arch/arm/mach-omap2/Makefile
@@ -6,7 +6,7 @@ ccflags-y := -I$(srctree)/$(src)/include \
 	-I$(srctree)/arch/arm/plat-omap/include
 
 # Common support
-obj-y := id.o io.o control.o mux.o devices.o fb.o timer.o pm.o \
+obj-y := id.o io.o control.o devices.o fb.o timer.o pm.o \
 	 common.o gpio.o dma.o wd_timer.o display.o i2c.o hdq1w.o omap_hwmod.o \
 	 omap_device.o omap-headsmp.o sram.o drm.o
 
@@ -63,9 +63,6 @@ obj-$(CONFIG_ARCH_OMAP4)		+= omap4-restart.o
 obj-$(CONFIG_SOC_OMAP5)			+= omap4-restart.o
 obj-$(CONFIG_SOC_DRA7XX)		+= omap4-restart.o
 
-# Pin multiplexing
-obj-$(CONFIG_ARCH_OMAP3)		+= mux34xx.o
-
 # SMS/SDRC
 obj-$(CONFIG_ARCH_OMAP2)		+= sdrc2xxx.o
 # obj-$(CONFIG_ARCH_OMAP3)		+= sdrc3xxx.o
diff --git a/arch/arm/mach-omap2/common.h b/arch/arm/mach-omap2/common.h
index deed42e1dd9c..4aec2723ece7 100644
--- a/arch/arm/mach-omap2/common.h
+++ b/arch/arm/mach-omap2/common.h
@@ -77,15 +77,6 @@ static inline int omap4_pm_init_early(void)
 }
 #endif
 
-#ifdef CONFIG_OMAP_MUX
-int omap_mux_late_init(void);
-#else
-static inline int omap_mux_late_init(void)
-{
-	return 0;
-}
-#endif
-
 extern void omap2_init_common_infrastructure(void);
 
 extern void omap_init_time(void);
diff --git a/arch/arm/mach-omap2/dss-common.c b/arch/arm/mach-omap2/dss-common.c
index 1d583bc0b1a9..77b618b0a76b 100644
--- a/arch/arm/mach-omap2/dss-common.c
+++ b/arch/arm/mach-omap2/dss-common.c
@@ -32,6 +32,5 @@
 
 #include "soc.h"
 #include "dss-common.h"
-#include "mux.h"
 #include "display.h"
 
diff --git a/arch/arm/mach-omap2/hsmmc.c b/arch/arm/mach-omap2/hsmmc.c
index 478097741bce..cb754c46747e 100644
--- a/arch/arm/mach-omap2/hsmmc.c
+++ b/arch/arm/mach-omap2/hsmmc.c
@@ -22,7 +22,6 @@
 #include "omap_device.h"
 #include "omap-pm.h"
 
-#include "mux.h"
 #include "hsmmc.h"
 #include "control.h"
 
@@ -147,91 +146,6 @@ static int nop_mmc_set_power(struct device *dev, int power_on, int vdd)
 	return 0;
 }
 
-static inline void omap_hsmmc_mux(struct omap_hsmmc_platform_data
-				  *mmc_controller, int controller_nr)
-{
-	if (gpio_is_valid(mmc_controller->gpio_cd) &&
-	    (mmc_controller->gpio_cd < OMAP_MAX_GPIO_LINES))
-		omap_mux_init_gpio(mmc_controller->gpio_cd,
-				   OMAP_PIN_INPUT_PULLUP);
-	if (gpio_is_valid(mmc_controller->gpio_cod) &&
-	    (mmc_controller->gpio_cod < OMAP_MAX_GPIO_LINES))
-		omap_mux_init_gpio(mmc_controller->gpio_cod,
-				   OMAP_PIN_INPUT_PULLUP);
-	if (gpio_is_valid(mmc_controller->gpio_wp) &&
-	    (mmc_controller->gpio_wp < OMAP_MAX_GPIO_LINES))
-		omap_mux_init_gpio(mmc_controller->gpio_wp,
-				   OMAP_PIN_INPUT_PULLUP);
-	if (cpu_is_omap34xx()) {
-		if (controller_nr == 0) {
-			omap_mux_init_signal("sdmmc1_clk",
-				OMAP_PIN_INPUT_PULLUP);
-			omap_mux_init_signal("sdmmc1_cmd",
-				OMAP_PIN_INPUT_PULLUP);
-			omap_mux_init_signal("sdmmc1_dat0",
-				OMAP_PIN_INPUT_PULLUP);
-			if (mmc_controller->caps &
-				(MMC_CAP_4_BIT_DATA | MMC_CAP_8_BIT_DATA)) {
-				omap_mux_init_signal("sdmmc1_dat1",
-					OMAP_PIN_INPUT_PULLUP);
-				omap_mux_init_signal("sdmmc1_dat2",
-					OMAP_PIN_INPUT_PULLUP);
-				omap_mux_init_signal("sdmmc1_dat3",
-					OMAP_PIN_INPUT_PULLUP);
-			}
-			if (mmc_controller->caps &
-						MMC_CAP_8_BIT_DATA) {
-				omap_mux_init_signal("sdmmc1_dat4",
-					OMAP_PIN_INPUT_PULLUP);
-				omap_mux_init_signal("sdmmc1_dat5",
-					OMAP_PIN_INPUT_PULLUP);
-				omap_mux_init_signal("sdmmc1_dat6",
-					OMAP_PIN_INPUT_PULLUP);
-				omap_mux_init_signal("sdmmc1_dat7",
-					OMAP_PIN_INPUT_PULLUP);
-			}
-		}
-		if (controller_nr == 1) {
-			/* MMC2 */
-			omap_mux_init_signal("sdmmc2_clk",
-				OMAP_PIN_INPUT_PULLUP);
-			omap_mux_init_signal("sdmmc2_cmd",
-				OMAP_PIN_INPUT_PULLUP);
-			omap_mux_init_signal("sdmmc2_dat0",
-				OMAP_PIN_INPUT_PULLUP);
-
-			/*
-			 * For 8 wire configurations, Lines DAT4, 5, 6 and 7
-			 * need to be muxed in the board-*.c files
-			 */
-			if (mmc_controller->caps &
-				(MMC_CAP_4_BIT_DATA | MMC_CAP_8_BIT_DATA)) {
-				omap_mux_init_signal("sdmmc2_dat1",
-					OMAP_PIN_INPUT_PULLUP);
-				omap_mux_init_signal("sdmmc2_dat2",
-					OMAP_PIN_INPUT_PULLUP);
-				omap_mux_init_signal("sdmmc2_dat3",
-					OMAP_PIN_INPUT_PULLUP);
-			}
-			if (mmc_controller->caps &
-							MMC_CAP_8_BIT_DATA) {
-				omap_mux_init_signal("sdmmc2_dat4.sdmmc2_dat4",
-					OMAP_PIN_INPUT_PULLUP);
-				omap_mux_init_signal("sdmmc2_dat5.sdmmc2_dat5",
-					OMAP_PIN_INPUT_PULLUP);
-				omap_mux_init_signal("sdmmc2_dat6.sdmmc2_dat6",
-					OMAP_PIN_INPUT_PULLUP);
-				omap_mux_init_signal("sdmmc2_dat7.sdmmc2_dat7",
-					OMAP_PIN_INPUT_PULLUP);
-			}
-		}
-
-		/*
-		 * For MMC3 the pins need to be muxed in the board-*.c files
-		 */
-	}
-}
-
 static int __init omap_hsmmc_pdata_init(struct omap2_hsmmc_info *c,
 					struct omap_hsmmc_platform_data *mmc)
 {
@@ -410,8 +324,6 @@ static void __init omap_hsmmc_init_one(struct omap2_hsmmc_info *hsmmcinfo,
 	if (res < 0)
 		goto free_mmc;
 
-	omap_hsmmc_mux(mmc_data, (ctrl_nr - 1));
-
 	name = "omap_hsmmc";
 	res = snprintf(oh_name, MAX_OMAP_MMC_HWMOD_NAME_LEN,
 		     "mmc%d", ctrl_nr);
diff --git a/arch/arm/mach-omap2/io.c b/arch/arm/mach-omap2/io.c
index 0e9acdd95d70..b7a467651427 100644
--- a/arch/arm/mach-omap2/io.c
+++ b/arch/arm/mach-omap2/io.c
@@ -427,7 +427,6 @@ static void __init omap_hwmod_init_postsetup(void)
 
 static void __init __maybe_unused omap_common_late_init(void)
 {
-	omap_mux_late_init();
 	omap2_common_pm_late_init();
 	omap_soc_device_init();
 }
diff --git a/arch/arm/mach-omap2/msdi.c b/arch/arm/mach-omap2/msdi.c
index 8bdf182422bd..5a3bc3de58d0 100644
--- a/arch/arm/mach-omap2/msdi.c
+++ b/arch/arm/mach-omap2/msdi.c
@@ -30,7 +30,6 @@
 #include "control.h"
 #include "omap_hwmod.h"
 #include "omap_device.h"
-#include "mux.h"
 #include "mmc.h"
 
 /*
diff --git a/arch/arm/mach-omap2/mux.c b/arch/arm/mach-omap2/mux.c
deleted file mode 100644
index e1fa39e1ecf8..000000000000
--- a/arch/arm/mach-omap2/mux.c
+++ /dev/null
@@ -1,1153 +0,0 @@
-/*
- * linux/arch/arm/mach-omap2/mux.c
- *
- * OMAP2, OMAP3 and OMAP4 pin multiplexing configurations
- *
- * Copyright (C) 2004 - 2010 Texas Instruments Inc.
- * Copyright (C) 2003 - 2008 Nokia Corporation
- *
- * Written by Tony Lindgren
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * 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.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- *
- */
-#include <linux/kernel.h>
-#include <linux/init.h>
-#include <linux/io.h>
-#include <linux/list.h>
-#include <linux/slab.h>
-#include <linux/ctype.h>
-#include <linux/debugfs.h>
-#include <linux/seq_file.h>
-#include <linux/uaccess.h>
-#include <linux/irq.h>
-#include <linux/interrupt.h>
-
-
-#include "omap_hwmod.h"
-
-#include "soc.h"
-#include "control.h"
-#include "mux.h"
-#include "prm.h"
-#include "common.h"
-
-#define OMAP_MUX_BASE_OFFSET		0x30	/* Offset from CTRL_BASE */
-#define OMAP_MUX_BASE_SZ		0x5ca
-
-struct omap_mux_entry {
-	struct omap_mux		mux;
-	struct list_head	node;
-};
-
-static LIST_HEAD(mux_partitions);
-static DEFINE_MUTEX(muxmode_mutex);
-
-struct omap_mux_partition *omap_mux_get(const char *name)
-{
-	struct omap_mux_partition *partition;
-
-	list_for_each_entry(partition, &mux_partitions, node) {
-		if (!strcmp(name, partition->name))
-			return partition;
-	}
-
-	return NULL;
-}
-
-u16 omap_mux_read(struct omap_mux_partition *partition, u16 reg)
-{
-	if (partition->flags & OMAP_MUX_REG_8BIT)
-		return readb_relaxed(partition->base + reg);
-	else
-		return readw_relaxed(partition->base + reg);
-}
-
-void omap_mux_write(struct omap_mux_partition *partition, u16 val,
-			   u16 reg)
-{
-	if (partition->flags & OMAP_MUX_REG_8BIT)
-		writeb_relaxed(val, partition->base + reg);
-	else
-		writew_relaxed(val, partition->base + reg);
-}
-
-void omap_mux_write_array(struct omap_mux_partition *partition,
-				 struct omap_board_mux *board_mux)
-{
-	if (!board_mux)
-		return;
-
-	while (board_mux->reg_offset != OMAP_MUX_TERMINATOR) {
-		omap_mux_write(partition, board_mux->value,
-			       board_mux->reg_offset);
-		board_mux++;
-	}
-}
-
-#ifdef CONFIG_OMAP_MUX
-
-static char *omap_mux_options;
-
-static int __init _omap_mux_init_gpio(struct omap_mux_partition *partition,
-				      int gpio, int val)
-{
-	struct omap_mux_entry *e;
-	struct omap_mux *gpio_mux = NULL;
-	u16 old_mode;
-	u16 mux_mode;
-	int found = 0;
-	struct list_head *muxmodes = &partition->muxmodes;
-
-	if (!gpio)
-		return -EINVAL;
-
-	list_for_each_entry(e, muxmodes, node) {
-		struct omap_mux *m = &e->mux;
-		if (gpio == m->gpio) {
-			gpio_mux = m;
-			found++;
-		}
-	}
-
-	if (found == 0) {
-		pr_err("%s: Could not set gpio%i\n", __func__, gpio);
-		return -ENODEV;
-	}
-
-	if (found > 1) {
-		pr_info("%s: Multiple gpio paths (%d) for gpio%i\n", __func__,
-			found, gpio);
-		return -EINVAL;
-	}
-
-	old_mode = omap_mux_read(partition, gpio_mux->reg_offset);
-	mux_mode = val & ~(OMAP_MUX_NR_MODES - 1);
-	mux_mode |= partition->gpio;
-	pr_debug("%s: Setting signal %s.gpio%i 0x%04x -> 0x%04x\n", __func__,
-		 gpio_mux->muxnames[0], gpio, old_mode, mux_mode);
-	omap_mux_write(partition, mux_mode, gpio_mux->reg_offset);
-
-	return 0;
-}
-
-int __init omap_mux_init_gpio(int gpio, int val)
-{
-	struct omap_mux_partition *partition;
-	int ret;
-
-	list_for_each_entry(partition, &mux_partitions, node) {
-		ret = _omap_mux_init_gpio(partition, gpio, val);
-		if (!ret)
-			return ret;
-	}
-
-	return -ENODEV;
-}
-
-static int __init _omap_mux_get_by_name(struct omap_mux_partition *partition,
-					const char *muxname,
-					struct omap_mux **found_mux)
-{
-	struct omap_mux *mux = NULL;
-	struct omap_mux_entry *e;
-	const char *mode_name;
-	int found = 0, found_mode = 0, mode0_len = 0;
-	struct list_head *muxmodes = &partition->muxmodes;
-
-	mode_name = strchr(muxname, '.');
-	if (mode_name) {
-		mode0_len = strlen(muxname) - strlen(mode_name);
-		mode_name++;
-	} else {
-		mode_name = muxname;
-	}
-
-	list_for_each_entry(e, muxmodes, node) {
-		char *m0_entry;
-		int i;
-
-		mux = &e->mux;
-		m0_entry = mux->muxnames[0];
-
-		/* First check for full name in mode0.muxmode format */
-		if (mode0_len)
-			if (strncmp(muxname, m0_entry, mode0_len) ||
-			    (strlen(m0_entry) != mode0_len))
-				continue;
-
-		/* Then check for muxmode only */
-		for (i = 0; i < OMAP_MUX_NR_MODES; i++) {
-			char *mode_cur = mux->muxnames[i];
-
-			if (!mode_cur)
-				continue;
-
-			if (!strcmp(mode_name, mode_cur)) {
-				*found_mux = mux;
-				found++;
-				found_mode = i;
-			}
-		}
-	}
-
-	if (found == 1) {
-		return found_mode;
-	}
-
-	if (found > 1) {
-		pr_err("%s: Multiple signal paths (%i) for %s\n", __func__,
-		       found, muxname);
-		return -EINVAL;
-	}
-
-	return -ENODEV;
-}
-
-int __init omap_mux_get_by_name(const char *muxname,
-			struct omap_mux_partition **found_partition,
-			struct omap_mux **found_mux)
-{
-	struct omap_mux_partition *partition;
-
-	list_for_each_entry(partition, &mux_partitions, node) {
-		struct omap_mux *mux = NULL;
-		int mux_mode = _omap_mux_get_by_name(partition, muxname, &mux);
-		if (mux_mode < 0)
-			continue;
-
-		*found_partition = partition;
-		*found_mux = mux;
-
-		return mux_mode;
-	}
-
-	pr_err("%s: Could not find signal %s\n", __func__, muxname);
-
-	return -ENODEV;
-}
-
-int __init omap_mux_init_signal(const char *muxname, int val)
-{
-	struct omap_mux_partition *partition = NULL;
-	struct omap_mux *mux = NULL;
-	u16 old_mode;
-	int mux_mode;
-
-	mux_mode = omap_mux_get_by_name(muxname, &partition, &mux);
-	if (mux_mode < 0 || !mux)
-		return mux_mode;
-
-	old_mode = omap_mux_read(partition, mux->reg_offset);
-	mux_mode |= val;
-	pr_debug("%s: Setting signal %s 0x%04x -> 0x%04x\n",
-			 __func__, muxname, old_mode, mux_mode);
-	omap_mux_write(partition, mux_mode, mux->reg_offset);
-
-	return 0;
-}
-
-struct omap_hwmod_mux_info * __init
-omap_hwmod_mux_init(struct omap_device_pad *bpads, int nr_pads)
-{
-	struct omap_hwmod_mux_info *hmux;
-	int i, nr_pads_dynamic = 0;
-
-	if (!bpads || nr_pads < 1)
-		return NULL;
-
-	hmux = kzalloc(sizeof(struct omap_hwmod_mux_info), GFP_KERNEL);
-	if (!hmux)
-		goto err1;
-
-	hmux->nr_pads = nr_pads;
-
-	hmux->pads = kzalloc(sizeof(struct omap_device_pad) *
-				nr_pads, GFP_KERNEL);
-	if (!hmux->pads)
-		goto err2;
-
-	for (i = 0; i < hmux->nr_pads; i++) {
-		struct omap_mux_partition *partition;
-		struct omap_device_pad *bpad = &bpads[i], *pad = &hmux->pads[i];
-		struct omap_mux *mux;
-		int mux_mode;
-
-		mux_mode = omap_mux_get_by_name(bpad->name, &partition, &mux);
-		if (mux_mode < 0)
-			goto err3;
-		if (!pad->partition)
-			pad->partition = partition;
-		if (!pad->mux)
-			pad->mux = mux;
-
-		pad->name = kzalloc(strlen(bpad->name) + 1, GFP_KERNEL);
-		if (!pad->name) {
-			int j;
-
-			for (j = i - 1; j >= 0; j--)
-				kfree(hmux->pads[j].name);
-			goto err3;
-		}
-		strcpy(pad->name, bpad->name);
-
-		pad->flags = bpad->flags;
-		pad->enable = bpad->enable;
-		pad->idle = bpad->idle;
-		pad->off = bpad->off;
-
-		if (pad->flags &
-		    (OMAP_DEVICE_PAD_REMUX | OMAP_DEVICE_PAD_WAKEUP))
-			nr_pads_dynamic++;
-
-		pr_debug("%s: Initialized %s\n", __func__, pad->name);
-	}
-
-	if (!nr_pads_dynamic)
-		return hmux;
-
-	/*
-	 * Add pads that need dynamic muxing into a separate list
-	 */
-
-	hmux->nr_pads_dynamic = nr_pads_dynamic;
-	hmux->pads_dynamic = kzalloc(sizeof(struct omap_device_pad *) *
-					nr_pads_dynamic, GFP_KERNEL);
-	if (!hmux->pads_dynamic) {
-		pr_err("%s: Could not allocate dynamic pads\n", __func__);
-		return hmux;
-	}
-
-	nr_pads_dynamic = 0;
-	for (i = 0; i < hmux->nr_pads; i++) {
-		struct omap_device_pad *pad = &hmux->pads[i];
-
-		if (pad->flags &
-		    (OMAP_DEVICE_PAD_REMUX | OMAP_DEVICE_PAD_WAKEUP)) {
-			pr_debug("%s: pad %s tagged dynamic\n",
-					__func__, pad->name);
-			hmux->pads_dynamic[nr_pads_dynamic] = pad;
-			nr_pads_dynamic++;
-		}
-	}
-
-	return hmux;
-
-err3:
-	kfree(hmux->pads);
-err2:
-	kfree(hmux);
-err1:
-	pr_err("%s: Could not allocate device mux entry\n", __func__);
-
-	return NULL;
-}
-
-/**
- * omap_hwmod_mux_scan_wakeups - omap hwmod scan wakeup pads
- * @hmux: Pads for a hwmod
- * @mpu_irqs: MPU irq array for a hwmod
- *
- * Scans the wakeup status of pads for a single hwmod.  If an irq
- * array is defined for this mux, the parser will call the registered
- * ISRs for corresponding pads, otherwise the parser will stop at the
- * first wakeup active pad and return.  Returns true if there is a
- * pending and non-served wakeup event for the mux, otherwise false.
- */
-static bool omap_hwmod_mux_scan_wakeups(struct omap_hwmod_mux_info *hmux,
-		struct omap_hwmod_irq_info *mpu_irqs)
-{
-	int i, irq;
-	unsigned int val;
-	u32 handled_irqs = 0;
-
-	for (i = 0; i < hmux->nr_pads_dynamic; i++) {
-		struct omap_device_pad *pad = hmux->pads_dynamic[i];
-
-		if (!(pad->flags & OMAP_DEVICE_PAD_WAKEUP) ||
-		    !(pad->idle & OMAP_WAKEUP_EN))
-			continue;
-
-		val = omap_mux_read(pad->partition, pad->mux->reg_offset);
-		if (!(val & OMAP_WAKEUP_EVENT))
-			continue;
-
-		if (!hmux->irqs)
-			return true;
-
-		irq = hmux->irqs[i];
-		/* make sure we only handle each irq once */
-		if (handled_irqs & 1 << irq)
-			continue;
-
-		handled_irqs |= 1 << irq;
-
-		generic_handle_irq(mpu_irqs[irq].irq);
-	}
-
-	return false;
-}
-
-/**
- * _omap_hwmod_mux_handle_irq - Process wakeup events for a single hwmod
- *
- * Checks a single hwmod for every wakeup capable pad to see if there is an
- * active wakeup event. If this is the case, call the corresponding ISR.
- */
-static int _omap_hwmod_mux_handle_irq(struct omap_hwmod *oh, void *data)
-{
-	if (!oh->mux || !oh->mux->enabled)
-		return 0;
-	if (omap_hwmod_mux_scan_wakeups(oh->mux, oh->mpu_irqs))
-		generic_handle_irq(oh->mpu_irqs[0].irq);
-	return 0;
-}
-
-/**
- * omap_hwmod_mux_handle_irq - Process pad wakeup irqs.
- *
- * Calls a function for each registered omap_hwmod to check
- * pad wakeup statuses.
- */
-static irqreturn_t omap_hwmod_mux_handle_irq(int irq, void *unused)
-{
-	omap_hwmod_for_each(_omap_hwmod_mux_handle_irq, NULL);
-	return IRQ_HANDLED;
-}
-
-/* Assumes the calling function takes care of locking */
-void omap_hwmod_mux(struct omap_hwmod_mux_info *hmux, u8 state)
-{
-	int i;
-
-	/* Runtime idling of dynamic pads */
-	if (state == _HWMOD_STATE_IDLE && hmux->enabled) {
-		for (i = 0; i < hmux->nr_pads_dynamic; i++) {
-			struct omap_device_pad *pad = hmux->pads_dynamic[i];
-			int val = -EINVAL;
-
-			val = pad->idle;
-			omap_mux_write(pad->partition, val,
-					pad->mux->reg_offset);
-		}
-
-		return;
-	}
-
-	/* Runtime enabling of dynamic pads */
-	if ((state == _HWMOD_STATE_ENABLED) && hmux->pads_dynamic
-					&& hmux->enabled) {
-		for (i = 0; i < hmux->nr_pads_dynamic; i++) {
-			struct omap_device_pad *pad = hmux->pads_dynamic[i];
-			int val = -EINVAL;
-
-			val = pad->enable;
-			omap_mux_write(pad->partition, val,
-					pad->mux->reg_offset);
-		}
-
-		return;
-	}
-
-	/* Enabling or disabling of all pads */
-	for (i = 0; i < hmux->nr_pads; i++) {
-		struct omap_device_pad *pad = &hmux->pads[i];
-		int flags, val = -EINVAL;
-
-		flags = pad->flags;
-
-		switch (state) {
-		case _HWMOD_STATE_ENABLED:
-			val = pad->enable;
-			pr_debug("%s: Enabling %s %x\n", __func__,
-					pad->name, val);
-			break;
-		case _HWMOD_STATE_DISABLED:
-			/* Use safe mode unless OMAP_DEVICE_PAD_REMUX */
-			if (flags & OMAP_DEVICE_PAD_REMUX)
-				val = pad->off;
-			else
-				val = OMAP_MUX_MODE7;
-			pr_debug("%s: Disabling %s %x\n", __func__,
-					pad->name, val);
-			break;
-		default:
-			/* Nothing to be done */
-			break;
-		}
-
-		if (val >= 0) {
-			omap_mux_write(pad->partition, val,
-					pad->mux->reg_offset);
-			pad->flags = flags;
-		}
-	}
-
-	if (state == _HWMOD_STATE_ENABLED)
-		hmux->enabled = true;
-	else
-		hmux->enabled = false;
-}
-
-#ifdef CONFIG_DEBUG_FS
-
-#define OMAP_MUX_MAX_NR_FLAGS	10
-#define OMAP_MUX_TEST_FLAG(val, mask)				\
-	if (((val) & (mask)) == (mask)) {			\
-		i++;						\
-		flags[i] =  #mask;				\
-	}
-
-/* REVISIT: Add checking for non-optimal mux settings */
-static inline void omap_mux_decode(struct seq_file *s, u16 val)
-{
-	char *flags[OMAP_MUX_MAX_NR_FLAGS];
-	char mode[sizeof("OMAP_MUX_MODE") + 1];
-	int i = -1;
-
-	sprintf(mode, "OMAP_MUX_MODE%d", val & 0x7);
-	i++;
-	flags[i] = mode;
-
-	OMAP_MUX_TEST_FLAG(val, OMAP_PIN_OFF_WAKEUPENABLE);
-	if (val & OMAP_OFF_EN) {
-		if (!(val & OMAP_OFFOUT_EN)) {
-			if (!(val & OMAP_OFF_PULL_UP)) {
-				OMAP_MUX_TEST_FLAG(val,
-					OMAP_PIN_OFF_INPUT_PULLDOWN);
-			} else {
-				OMAP_MUX_TEST_FLAG(val,
-					OMAP_PIN_OFF_INPUT_PULLUP);
-			}
-		} else {
-			if (!(val & OMAP_OFFOUT_VAL)) {
-				OMAP_MUX_TEST_FLAG(val,
-					OMAP_PIN_OFF_OUTPUT_LOW);
-			} else {
-				OMAP_MUX_TEST_FLAG(val,
-					OMAP_PIN_OFF_OUTPUT_HIGH);
-			}
-		}
-	}
-
-	if (val & OMAP_INPUT_EN) {
-		if (val & OMAP_PULL_ENA) {
-			if (!(val & OMAP_PULL_UP)) {
-				OMAP_MUX_TEST_FLAG(val,
-					OMAP_PIN_INPUT_PULLDOWN);
-			} else {
-				OMAP_MUX_TEST_FLAG(val, OMAP_PIN_INPUT_PULLUP);
-			}
-		} else {
-			OMAP_MUX_TEST_FLAG(val, OMAP_PIN_INPUT);
-		}
-	} else {
-		i++;
-		flags[i] = "OMAP_PIN_OUTPUT";
-	}
-
-	do {
-		seq_printf(s, "%s", flags[i]);
-		if (i > 0)
-			seq_puts(s, " | ");
-	} while (i-- > 0);
-}
-
-#define OMAP_MUX_DEFNAME_LEN	32
-
-static int omap_mux_dbg_board_show(struct seq_file *s, void *unused)
-{
-	struct omap_mux_partition *partition = s->private;
-	struct omap_mux_entry *e;
-	u8 omap_gen = omap_rev() >> 28;
-
-	list_for_each_entry(e, &partition->muxmodes, node) {
-		struct omap_mux *m = &e->mux;
-		char m0_def[OMAP_MUX_DEFNAME_LEN];
-		char *m0_name = m->muxnames[0];
-		u16 val;
-		int i, mode;
-
-		if (!m0_name)
-			continue;
-
-		/* REVISIT: Needs to be updated if mode0 names get longer */
-		for (i = 0; i < OMAP_MUX_DEFNAME_LEN; i++) {
-			if (m0_name[i] == '\0') {
-				m0_def[i] = m0_name[i];
-				break;
-			}
-			m0_def[i] = toupper(m0_name[i]);
-		}
-		val = omap_mux_read(partition, m->reg_offset);
-		mode = val & OMAP_MUX_MODE7;
-		if (mode != 0)
-			seq_printf(s, "/* %s */\n", m->muxnames[mode]);
-
-		/*
-		 * XXX: Might be revisited to support differences across
-		 * same OMAP generation.
-		 */
-		seq_printf(s, "OMAP%d_MUX(%s, ", omap_gen, m0_def);
-		omap_mux_decode(s, val);
-		seq_puts(s, "),\n");
-	}
-
-	return 0;
-}
-
-static int omap_mux_dbg_board_open(struct inode *inode, struct file *file)
-{
-	return single_open(file, omap_mux_dbg_board_show, inode->i_private);
-}
-
-static const struct file_operations omap_mux_dbg_board_fops = {
-	.open		= omap_mux_dbg_board_open,
-	.read		= seq_read,
-	.llseek		= seq_lseek,
-	.release	= single_release,
-};
-
-static struct omap_mux_partition *omap_mux_get_partition(struct omap_mux *mux)
-{
-	struct omap_mux_partition *partition;
-
-	list_for_each_entry(partition, &mux_partitions, node) {
-		struct list_head *muxmodes = &partition->muxmodes;
-		struct omap_mux_entry *e;
-
-		list_for_each_entry(e, muxmodes, node) {
-			struct omap_mux *m = &e->mux;
-
-			if (m == mux)
-				return partition;
-		}
-	}
-
-	return NULL;
-}
-
-static int omap_mux_dbg_signal_show(struct seq_file *s, void *unused)
-{
-	struct omap_mux *m = s->private;
-	struct omap_mux_partition *partition;
-	const char *none = "NA";
-	u16 val;
-	int mode;
-
-	partition = omap_mux_get_partition(m);
-	if (!partition)
-		return 0;
-
-	val = omap_mux_read(partition, m->reg_offset);
-	mode = val & OMAP_MUX_MODE7;
-
-	seq_printf(s, "name: %s.%s (0x%08x/0x%03x = 0x%04x), b %s, t %s\n",
-			m->muxnames[0], m->muxnames[mode],
-			partition->phys + m->reg_offset, m->reg_offset, val,
-			m->balls[0] ? m->balls[0] : none,
-			m->balls[1] ? m->balls[1] : none);
-	seq_puts(s, "mode: ");
-	omap_mux_decode(s, val);
-	seq_putc(s, '\n');
-	seq_printf(s, "signals: %s | %s | %s | %s | %s | %s | %s | %s\n",
-			m->muxnames[0] ? m->muxnames[0] : none,
-			m->muxnames[1] ? m->muxnames[1] : none,
-			m->muxnames[2] ? m->muxnames[2] : none,
-			m->muxnames[3] ? m->muxnames[3] : none,
-			m->muxnames[4] ? m->muxnames[4] : none,
-			m->muxnames[5] ? m->muxnames[5] : none,
-			m->muxnames[6] ? m->muxnames[6] : none,
-			m->muxnames[7] ? m->muxnames[7] : none);
-
-	return 0;
-}
-
-#define OMAP_MUX_MAX_ARG_CHAR  7
-
-static ssize_t omap_mux_dbg_signal_write(struct file *file,
-					 const char __user *user_buf,
-					 size_t count, loff_t *ppos)
-{
-	struct seq_file *seqf;
-	struct omap_mux *m;
-	u16 val;
-	int ret;
-	struct omap_mux_partition *partition;
-
-	if (count > OMAP_MUX_MAX_ARG_CHAR)
-		return -EINVAL;
-
-	ret = kstrtou16_from_user(user_buf, count, 0x10, &val);
-	if (ret < 0)
-		return ret;
-
-	seqf = file->private_data;
-	m = seqf->private;
-
-	partition = omap_mux_get_partition(m);
-	if (!partition)
-		return -ENODEV;
-
-	omap_mux_write(partition, val, m->reg_offset);
-	*ppos += count;
-
-	return count;
-}
-
-static int omap_mux_dbg_signal_open(struct inode *inode, struct file *file)
-{
-	return single_open(file, omap_mux_dbg_signal_show, inode->i_private);
-}
-
-static const struct file_operations omap_mux_dbg_signal_fops = {
-	.open		= omap_mux_dbg_signal_open,
-	.read		= seq_read,
-	.write		= omap_mux_dbg_signal_write,
-	.llseek		= seq_lseek,
-	.release	= single_release,
-};
-
-static struct dentry *mux_dbg_dir;
-
-static void __init omap_mux_dbg_create_entry(
-				struct omap_mux_partition *partition,
-				struct dentry *mux_dbg_dir)
-{
-	struct omap_mux_entry *e;
-
-	list_for_each_entry(e, &partition->muxmodes, node) {
-		struct omap_mux *m = &e->mux;
-
-		(void)debugfs_create_file(m->muxnames[0], S_IWUSR | S_IRUGO,
-					  mux_dbg_dir, m,
-					  &omap_mux_dbg_signal_fops);
-	}
-}
-
-static void __init omap_mux_dbg_init(void)
-{
-	struct omap_mux_partition *partition;
-	static struct dentry *mux_dbg_board_dir;
-
-	mux_dbg_dir = debugfs_create_dir("omap_mux", NULL);
-	if (!mux_dbg_dir)
-		return;
-
-	mux_dbg_board_dir = debugfs_create_dir("board", mux_dbg_dir);
-	if (!mux_dbg_board_dir)
-		return;
-
-	list_for_each_entry(partition, &mux_partitions, node) {
-		omap_mux_dbg_create_entry(partition, mux_dbg_dir);
-		(void)debugfs_create_file(partition->name, S_IRUGO,
-					  mux_dbg_board_dir, partition,
-					  &omap_mux_dbg_board_fops);
-	}
-}
-
-#else
-static inline void omap_mux_dbg_init(void)
-{
-}
-#endif	/* CONFIG_DEBUG_FS */
-
-static void __init omap_mux_free_names(struct omap_mux *m)
-{
-	int i;
-
-	for (i = 0; i < OMAP_MUX_NR_MODES; i++)
-		kfree(m->muxnames[i]);
-
-#ifdef CONFIG_DEBUG_FS
-	for (i = 0; i < OMAP_MUX_NR_SIDES; i++)
-		kfree(m->balls[i]);
-#endif
-
-}
-
-/* Free all data except for GPIO pins unless CONFIG_DEBUG_FS is set */
-int __init omap_mux_late_init(void)
-{
-	struct omap_mux_partition *partition;
-	int ret;
-
-	list_for_each_entry(partition, &mux_partitions, node) {
-		struct omap_mux_entry *e, *tmp;
-		list_for_each_entry_safe(e, tmp, &partition->muxmodes, node) {
-			struct omap_mux *m = &e->mux;
-			u16 mode = omap_mux_read(partition, m->reg_offset);
-
-			if (OMAP_MODE_GPIO(partition, mode))
-				continue;
-
-#ifndef CONFIG_DEBUG_FS
-			mutex_lock(&muxmode_mutex);
-			list_del(&e->node);
-			mutex_unlock(&muxmode_mutex);
-			omap_mux_free_names(m);
-			kfree(m);
-#endif
-		}
-	}
-
-	omap_mux_dbg_init();
-
-	/* see pinctrl-single-omap for the wake-up interrupt handling */
-	if (of_have_populated_dt())
-		return 0;
-
-	ret = request_irq(omap_prcm_event_to_irq("io"),
-		omap_hwmod_mux_handle_irq, IRQF_SHARED | IRQF_NO_SUSPEND,
-			"hwmod_io", omap_mux_late_init);
-
-	if (ret)
-		pr_warn("mux: Failed to setup hwmod io irq %d\n", ret);
-
-	return 0;
-}
-
-static void __init omap_mux_package_fixup(struct omap_mux *p,
-					struct omap_mux *superset)
-{
-	while (p->reg_offset !=  OMAP_MUX_TERMINATOR) {
-		struct omap_mux *s = superset;
-		int found = 0;
-
-		while (s->reg_offset != OMAP_MUX_TERMINATOR) {
-			if (s->reg_offset == p->reg_offset) {
-				*s = *p;
-				found++;
-				break;
-			}
-			s++;
-		}
-		if (!found)
-			pr_err("%s: Unknown e