gpio: nomadik: extract GPIO platform driver from drivers/pinctrl/nomadik/

Previously, drivers/pinctrl/nomadik/pinctrl-nomadik.c registered two
platform drivers: pinctrl & GPIO. Move the GPIO aspect to the
drivers/gpio/ folder, as would be expected.

Both drivers are intertwined for a reason; pinctrl requires access to
GPIO registers for pinmuxing, pull-disable, disabling interrupts while
setting the muxing and wakeup control. Information sharing is done
through a shared array containing GPIO chips and a few helper
functions. That shared array is not touched from gpio-nomadik when
CONFIG_PINCTRL_NOMADIK is not defined.

Make no change to the code that moved into gpio-nomadik; there should be
no behavior change following. A few functions are shared and header
comments are added. Checkpatch warnings are addressed. NUM_BANKS is
renamed to NMK_MAX_BANKS.

It is supported to compile gpio-nomadik without pinctrl-nomadik. The
opposite is not true.

Signed-off-by: Théo Lebrun <theo.lebrun@bootlin.com>
Link: https://lore.kernel.org/r/20240228-mbly-gpio-v2-6-3ba757474006@bootlin.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

5 files changed, 21 insertions, 892 deletions

diff --git a/drivers/pinctrl/nomadik/Kconfig b/drivers/pinctrl/nomadik/Kconfig
index 0fea167c283f..f47f0755a835 100644
--- a/drivers/pinctrl/nomadik/Kconfig
+++ b/drivers/pinctrl/nomadik/Kconfig
@@ -22,11 +22,10 @@ if (ARCH_U8500 || ARCH_NOMADIK)
 
 config PINCTRL_NOMADIK
 	bool "Nomadik pin controller driver"
-	depends on OF && GPIOLIB
+	depends on OF
 	select PINMUX
 	select PINCONF
-	select OF_GPIO
-	select GPIOLIB_IRQCHIP
+	select GPIO_NOMADIK
 
 config PINCTRL_STN8815
 	bool "STN8815 pin controller driver"
diff --git a/drivers/pinctrl/nomadik/pinctrl-nomadik-db8500.c b/drivers/pinctrl/nomadik/pinctrl-nomadik-db8500.c
index 490e0959e8be..0b4a3dd9d8c7 100644
--- a/drivers/pinctrl/nomadik/pinctrl-nomadik-db8500.c
+++ b/drivers/pinctrl/nomadik/pinctrl-nomadik-db8500.c
@@ -3,8 +3,9 @@
 #include <linux/types.h>
 
 #include <linux/pinctrl/pinctrl.h>
+#include <linux/gpio/driver.h>
 
-#include "pinctrl-nomadik.h"
+#include <linux/gpio/gpio-nomadik.h>
 
 /* All the pins that can be used for GPIO and some other functions */
 #define _GPIO(offset)		(offset)
diff --git a/drivers/pinctrl/nomadik/pinctrl-nomadik-stn8815.c b/drivers/pinctrl/nomadik/pinctrl-nomadik-stn8815.c
index 1552222ac68e..c5a52fcaba30 100644
--- a/drivers/pinctrl/nomadik/pinctrl-nomadik-stn8815.c
+++ b/drivers/pinctrl/nomadik/pinctrl-nomadik-stn8815.c
@@ -3,8 +3,9 @@
 #include <linux/types.h>
 
 #include <linux/pinctrl/pinctrl.h>
+#include <linux/gpio/driver.h>
 
-#include "pinctrl-nomadik.h"
+#include <linux/gpio/gpio-nomadik.h>
 
 /* All the pins that can be used for GPIO and some other functions */
 #define _GPIO(offset)		(offset)
diff --git a/drivers/pinctrl/nomadik/pinctrl-nomadik.c b/drivers/pinctrl/nomadik/pinctrl-nomadik.c
index 4f7c4af4f93c..16d836157f74 100644
--- a/drivers/pinctrl/nomadik/pinctrl-nomadik.c
+++ b/drivers/pinctrl/nomadik/pinctrl-nomadik.c
@@ -1,6 +1,8 @@
 // SPDX-License-Identifier: GPL-2.0-only
 /*
- * Generic GPIO driver for logic cells found in the Nomadik SoC
+ * Pinmux & pinconf driver for the IP block found in the Nomadik SoC. This
+ * depends on gpio-nomadik and some handling is intertwined; see nmk_gpio_chips
+ * which is used by this driver to access the GPIO banks array.
  *
  * Copyright (C) 2008,2009 STMicroelectronics
  * Copyright (C) 2009 Alessandro Rubini <rubini@unipv.it>
@@ -25,6 +27,7 @@
 #include <linux/seq_file.h>
 #include <linux/slab.h>
 #include <linux/spinlock.h>
+#include <linux/types.h>
 
 /* Since we request GPIOs from ourself */
 #include <linux/pinctrl/consumer.h>
@@ -36,15 +39,7 @@
 #include "../core.h"
 #include "../pinctrl-utils.h"
 
-#include "pinctrl-nomadik.h"
-
-/*
- * The GPIO module in the Nomadik family of Systems-on-Chip is an
- * AMBA device, managing 32 pins and alternate functions.  The logic block
- * is currently used in the Nomadik and ux500.
- *
- * Symbols in this file are called "nmk_gpio" for "nomadik gpio"
- */
+#include <linux/gpio/gpio-nomadik.h>
 
 /*
  * pin configurations are represented by 32-bit integers:
@@ -200,75 +195,6 @@ typedef unsigned long pin_cfg_t;
 	(PIN_CFG_DEFAULT |\
 	 (PIN_NUM(num) | PIN_##alt | PIN_OUTPUT_##val))
 
-/*
- * "nmk_gpio" and "NMK_GPIO" stand for "Nomadik GPIO", leaving
- * the "gpio" namespace for generic and cross-machine functions
- */
-
-#define GPIO_BLOCK_SHIFT 5
-#define NMK_GPIO_PER_CHIP (1 << GPIO_BLOCK_SHIFT)
-#define NMK_MAX_BANKS DIV_ROUND_UP(512, NMK_GPIO_PER_CHIP)
-
-/* Register in the logic block */
-#define NMK_GPIO_DAT	0x00
-#define NMK_GPIO_DATS	0x04
-#define NMK_GPIO_DATC	0x08
-#define NMK_GPIO_PDIS	0x0c
-#define NMK_GPIO_DIR	0x10
-#define NMK_GPIO_DIRS	0x14
-#define NMK_GPIO_DIRC	0x18
-#define NMK_GPIO_SLPC	0x1c
-#define NMK_GPIO_AFSLA	0x20
-#define NMK_GPIO_AFSLB	0x24
-#define NMK_GPIO_LOWEMI	0x28
-
-#define NMK_GPIO_RIMSC	0x40
-#define NMK_GPIO_FIMSC	0x44
-#define NMK_GPIO_IS	0x48
-#define NMK_GPIO_IC	0x4c
-#define NMK_GPIO_RWIMSC	0x50
-#define NMK_GPIO_FWIMSC	0x54
-#define NMK_GPIO_WKS	0x58
-/* These appear in DB8540 and later ASICs */
-#define NMK_GPIO_EDGELEVEL 0x5C
-#define NMK_GPIO_LEVEL	0x60
-
-
-/* Pull up/down values */
-enum nmk_gpio_pull {
-	NMK_GPIO_PULL_NONE,
-	NMK_GPIO_PULL_UP,
-	NMK_GPIO_PULL_DOWN,
-};
-
-/* Sleep mode */
-enum nmk_gpio_slpm {
-	NMK_GPIO_SLPM_INPUT,
-	NMK_GPIO_SLPM_WAKEUP_ENABLE = NMK_GPIO_SLPM_INPUT,
-	NMK_GPIO_SLPM_NOCHANGE,
-	NMK_GPIO_SLPM_WAKEUP_DISABLE = NMK_GPIO_SLPM_NOCHANGE,
-};
-
-struct nmk_gpio_chip {
-	struct gpio_chip chip;
-	void __iomem *addr;
-	struct clk *clk;
-	unsigned int bank;
-	void (*set_ioforce)(bool enable);
-	spinlock_t lock;
-	bool sleepmode;
-	/* Keep track of configured edges */
-	u32 edge_rising;
-	u32 edge_falling;
-	u32 real_wake;
-	u32 rwimsc;
-	u32 fwimsc;
-	u32 rimsc;
-	u32 fimsc;
-	u32 pull_up;
-	u32 lowemi;
-};
-
 /**
  * struct nmk_pinctrl - state container for the Nomadik pin controller
  * @dev: containing device pointer
@@ -283,11 +209,10 @@ struct nmk_pinctrl {
 	void __iomem *prcm_base;
 };
 
-static struct nmk_gpio_chip *nmk_gpio_chips[NMK_MAX_BANKS];
+/* See nmk_gpio_populate_chip() that fills this array. */
+struct nmk_gpio_chip *nmk_gpio_chips[NMK_MAX_BANKS];
 
-static DEFINE_SPINLOCK(nmk_gpio_slpm_lock);
-
-#define NUM_BANKS ARRAY_SIZE(nmk_gpio_chips)
+DEFINE_SPINLOCK(nmk_gpio_slpm_lock);
 
 static void __nmk_gpio_set_mode(struct nmk_gpio_chip *nmk_chip,
 				unsigned offset, int gpio_mode)
@@ -304,19 +229,6 @@ static void __nmk_gpio_set_mode(struct nmk_gpio_chip *nmk_chip,
 	writel(bfunc, nmk_chip->addr + NMK_GPIO_AFSLB);
 }
 
-static void __nmk_gpio_set_slpm(struct nmk_gpio_chip *nmk_chip,
-				unsigned offset, enum nmk_gpio_slpm mode)
-{
-	u32 slpm;
-
-	slpm = readl(nmk_chip->addr + NMK_GPIO_SLPC);
-	if (mode == NMK_GPIO_SLPM_NOCHANGE)
-		slpm |= BIT(offset);
-	else
-		slpm &= ~BIT(offset);
-	writel(slpm, nmk_chip->addr + NMK_GPIO_SLPC);
-}
-
 static void __nmk_gpio_set_pull(struct nmk_gpio_chip *nmk_chip,
 				unsigned offset, enum nmk_gpio_pull pull)
 {
@@ -364,22 +276,6 @@ static void __nmk_gpio_make_input(struct nmk_gpio_chip *nmk_chip,
 	writel(BIT(offset), nmk_chip->addr + NMK_GPIO_DIRC);
 }
 
-static void __nmk_gpio_set_output(struct nmk_gpio_chip *nmk_chip,
-				  unsigned offset, int val)
-{
-	if (val)
-		writel(BIT(offset), nmk_chip->addr + NMK_GPIO_DATS);
-	else
-		writel(BIT(offset), nmk_chip->addr + NMK_GPIO_DATC);
-}
-
-static void __nmk_gpio_make_output(struct nmk_gpio_chip *nmk_chip,
-				  unsigned offset, int val)
-{
-	writel(BIT(offset), nmk_chip->addr + NMK_GPIO_DIRS);
-	__nmk_gpio_set_output(nmk_chip, offset, val);
-}
-
 static void __nmk_gpio_set_mode_safe(struct nmk_gpio_chip *nmk_chip,
 				     unsigned offset, int gpio_mode,
 				     bool glitch)
@@ -548,7 +444,7 @@ static void nmk_gpio_glitch_slpm_init(unsigned int *slpm)
 {
 	int i;
 
-	for (i = 0; i < NUM_BANKS; i++) {
+	for (i = 0; i < NMK_MAX_BANKS; i++) {
 		struct nmk_gpio_chip *chip = nmk_gpio_chips[i];
 		unsigned int temp = slpm[i];
 
@@ -566,7 +462,7 @@ static void nmk_gpio_glitch_slpm_restore(unsigned int *slpm)
 {
 	int i;
 
-	for (i = 0; i < NUM_BANKS; i++) {
+	for (i = 0; i < NMK_MAX_BANKS; i++) {
 		struct nmk_gpio_chip *chip = nmk_gpio_chips[i];
 
 		if (!chip)
@@ -578,7 +474,8 @@ static void nmk_gpio_glitch_slpm_restore(unsigned int *slpm)
 	}
 }
 
-static int __maybe_unused nmk_prcm_gpiocr_get_mode(struct pinctrl_dev *pctldev, int gpio)
+/* Only called by gpio-nomadik but requires knowledge of struct nmk_pinctrl. */
+int __maybe_unused nmk_prcm_gpiocr_get_mode(struct pinctrl_dev *pctldev, int gpio)
 {
 	int i;
 	u16 reg;
@@ -610,576 +507,6 @@ static int __maybe_unused nmk_prcm_gpiocr_get_mode(struct pinctrl_dev *pctldev,
 	return NMK_GPIO_ALT_C;
 }
 
-/* IRQ functions */
-
-static void nmk_gpio_irq_ack(struct irq_data *d)
-{
-	struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
-	struct nmk_gpio_chip *nmk_chip = gpiochip_get_data(gc);
-
-	clk_enable(nmk_chip->clk);
-	writel(BIT(d->hwirq), nmk_chip->addr + NMK_GPIO_IC);
-	clk_disable(nmk_chip->clk);
-}
-
-enum nmk_gpio_irq_type {
-	NORMAL,
-	WAKE,
-};
-
-static void __nmk_gpio_irq_modify(struct nmk_gpio_chip *nmk_chip,
-				  int offset, enum nmk_gpio_irq_type which,
-				  bool enable)
-{
-	u32 *rimscval;
-	u32 *fimscval;
-	u32 rimscreg;
-	u32 fimscreg;
-
-	if (which == NORMAL) {
-		rimscreg = NMK_GPIO_RIMSC;
-		fimscreg = NMK_GPIO_FIMSC;
-		rimscval = &nmk_chip->rimsc;
-		fimscval = &nmk_chip->fimsc;
-	} else  {
-		rimscreg = NMK_GPIO_RWIMSC;
-		fimscreg = NMK_GPIO_FWIMSC;
-		rimscval = &nmk_chip->rwimsc;
-		fimscval = &nmk_chip->fwimsc;
-	}
-
-	/* we must individually set/clear the two edges */
-	if (nmk_chip->edge_rising & BIT(offset)) {
-		if (enable)
-			*rimscval |= BIT(offset);
-		else
-			*rimscval &= ~BIT(offset);
-		writel(*rimscval, nmk_chip->addr + rimscreg);
-	}
-	if (nmk_chip->edge_falling & BIT(offset)) {
-		if (enable)
-			*fimscval |= BIT(offset);
-		else
-			*fimscval &= ~BIT(offset);
-		writel(*fimscval, nmk_chip->addr + fimscreg);
-	}
-}
-
-static void __nmk_gpio_set_wake(struct nmk_gpio_chip *nmk_chip,
-				int offset, bool on)
-{
-	/*
-	 * Ensure WAKEUP_ENABLE is on.  No need to disable it if wakeup is
-	 * disabled, since setting SLPM to 1 increases power consumption, and
-	 * wakeup is anyhow controlled by the RIMSC and FIMSC registers.
-	 */
-	if (nmk_chip->sleepmode && on) {
-		__nmk_gpio_set_slpm(nmk_chip, offset,
-				    NMK_GPIO_SLPM_WAKEUP_ENABLE);
-	}
-
-	__nmk_gpio_irq_modify(nmk_chip, offset, WAKE, on);
-}
-
-static void nmk_gpio_irq_maskunmask(struct nmk_gpio_chip *nmk_chip,
-				    struct irq_data *d, bool enable)
-{
-	unsigned long flags;
-
-	clk_enable(nmk_chip->clk);
-	spin_lock_irqsave(&nmk_gpio_slpm_lock, flags);
-	spin_lock(&nmk_chip->lock);
-
-	__nmk_gpio_irq_modify(nmk_chip, d->hwirq, NORMAL, enable);
-
-	if (!(nmk_chip->real_wake & BIT(d->hwirq)))
-		__nmk_gpio_set_wake(nmk_chip, d->hwirq, enable);
-
-	spin_unlock(&nmk_chip->lock);
-	spin_unlock_irqrestore(&nmk_gpio_slpm_lock, flags);
-	clk_disable(nmk_chip->clk);
-}
-
-static void nmk_gpio_irq_mask(struct irq_data *d)
-{
-	struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
-	struct nmk_gpio_chip *nmk_chip = gpiochip_get_data(gc);
-
-	nmk_gpio_irq_maskunmask(nmk_chip, d, false);
-	gpiochip_disable_irq(gc, irqd_to_hwirq(d));
-}
-
-static void nmk_gpio_irq_unmask(struct irq_data *d)
-{
-	struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
-	struct nmk_gpio_chip *nmk_chip = gpiochip_get_data(gc);
-
-	gpiochip_enable_irq(gc, irqd_to_hwirq(d));
-	nmk_gpio_irq_maskunmask(nmk_chip, d, true);
-}
-
-static int nmk_gpio_irq_set_wake(struct irq_data *d, unsigned int on)
-{
-	struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
-	struct nmk_gpio_chip *nmk_chip = gpiochip_get_data(gc);
-	unsigned long flags;
-
-	clk_enable(nmk_chip->clk);
-	spin_lock_irqsave(&nmk_gpio_slpm_lock, flags);
-	spin_lock(&nmk_chip->lock);
-
-	if (irqd_irq_disabled(d))
-		__nmk_gpio_set_wake(nmk_chip, d->hwirq, on);
-
-	if (on)
-		nmk_chip->real_wake |= BIT(d->hwirq);
-	else
-		nmk_chip->real_wake &= ~BIT(d->hwirq);
-
-	spin_unlock(&nmk_chip->lock);
-	spin_unlock_irqrestore(&nmk_gpio_slpm_lock, flags);
-	clk_disable(nmk_chip->clk);
-
-	return 0;
-}
-
-static int nmk_gpio_irq_set_type(struct irq_data *d, unsigned int type)
-{
-	struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
-	struct nmk_gpio_chip *nmk_chip = gpiochip_get_data(gc);
-	bool enabled = !irqd_irq_disabled(d);
-	bool wake = irqd_is_wakeup_set(d);
-	unsigned long flags;
-
-	if (type & IRQ_TYPE_LEVEL_HIGH)
-		return -EINVAL;
-	if (type & IRQ_TYPE_LEVEL_LOW)
-		return -EINVAL;
-
-	clk_enable(nmk_chip->clk);
-	spin_lock_irqsave(&nmk_chip->lock, flags);
-
-	if (enabled)
-		__nmk_gpio_irq_modify(nmk_chip, d->hwirq, NORMAL, false);
-
-	if (enabled || wake)
-		__nmk_gpio_irq_modify(nmk_chip, d->hwirq, WAKE, false);
-
-	nmk_chip->edge_rising &= ~BIT(d->hwirq);
-	if (type & IRQ_TYPE_EDGE_RISING)
-		nmk_chip->edge_rising |= BIT(d->hwirq);
-
-	nmk_chip->edge_falling &= ~BIT(d->hwirq);
-	if (type & IRQ_TYPE_EDGE_FALLING)
-		nmk_chip->edge_falling |= BIT(d->hwirq);
-
-	if (enabled)
-		__nmk_gpio_irq_modify(nmk_chip, d->hwirq, NORMAL, true);
-
-	if (enabled || wake)
-		__nmk_gpio_irq_modify(nmk_chip, d->hwirq, WAKE, true);
-
-	spin_unlock_irqrestore(&nmk_chip->lock, flags);
-	clk_disable(nmk_chip->clk);
-
-	return 0;
-}
-
-static unsigned int nmk_gpio_irq_startup(struct irq_data *d)
-{
-	struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
-	struct nmk_gpio_chip *nmk_chip = gpiochip_get_data(gc);
-
-	clk_enable(nmk_chip->clk);
-	nmk_gpio_irq_unmask(d);
-	return 0;
-}
-
-static void nmk_gpio_irq_shutdown(struct irq_data *d)
-{
-	struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
-	struct nmk_gpio_chip *nmk_chip = gpiochip_get_data(gc);
-
-	nmk_gpio_irq_mask(d);
-	clk_disable(nmk_chip->clk);
-}
-
-static void nmk_gpio_irq_handler(struct irq_desc *desc)
-{
-	struct irq_chip *host_chip = irq_desc_get_chip(desc);
-	struct gpio_chip *chip = irq_desc_get_handler_data(desc);
-	struct nmk_gpio_chip *nmk_chip = gpiochip_get_data(chip);
-	u32 status;
-
-	chained_irq_enter(host_chip, desc);
-
-	clk_enable(nmk_chip->clk);
-	status = readl(nmk_chip->addr + NMK_GPIO_IS);
-	clk_disable(nmk_chip->clk);
-
-	while (status) {
-		int bit = __ffs(status);
-
-		generic_handle_domain_irq(chip->irq.domain, bit);
-		status &= ~BIT(bit);
-	}
-
-	chained_irq_exit(host_chip, desc);
-}
-
-/* I/O Functions */
-
-static int nmk_gpio_get_dir(struct gpio_chip *chip, unsigned offset)
-{
-	struct nmk_gpio_chip *nmk_chip = gpiochip_get_data(chip);
-	int dir;
-
-	clk_enable(nmk_chip->clk);
-
-	dir = readl(nmk_chip->addr + NMK_GPIO_DIR) & BIT(offset);
-
-	clk_disable(nmk_chip->clk);
-
-	if (dir)
-		return GPIO_LINE_DIRECTION_OUT;
-
-	return GPIO_LINE_DIRECTION_IN;
-}
-
-static int nmk_gpio_make_input(struct gpio_chip *chip, unsigned offset)
-{
-	struct nmk_gpio_chip *nmk_chip = gpiochip_get_data(chip);
-
-	clk_enable(nmk_chip->clk);
-
-	writel(BIT(offset), nmk_chip->addr + NMK_GPIO_DIRC);
-
-	clk_disable(nmk_chip->clk);
-
-	return 0;
-}
-
-static int nmk_gpio_get_input(struct gpio_chip *chip, unsigned offset)
-{
-	struct nmk_gpio_chip *nmk_chip = gpiochip_get_data(chip);
-	int value;
-
-	clk_enable(nmk_chip->clk);
-
-	value = !!(readl(nmk_chip->addr + NMK_GPIO_DAT) & BIT(offset));
-
-	clk_disable(nmk_chip->clk);
-
-	return value;
-}
-
-static void nmk_gpio_set_output(struct gpio_chip *chip, unsigned offset,
-				int val)
-{
-	struct nmk_gpio_chip *nmk_chip = gpiochip_get_data(chip);
-
-	clk_enable(nmk_chip->clk);
-
-	__nmk_gpio_set_output(nmk_chip, offset, val);
-
-	clk_disable(nmk_chip->clk);
-}
-
-static int nmk_gpio_make_output(struct gpio_chip *chip, unsigned offset,
-				int val)
-{
-	struct nmk_gpio_chip *nmk_chip = gpiochip_get_data(chip);
-
-	clk_enable(nmk_chip->clk);
-
-	__nmk_gpio_make_output(nmk_chip, offset, val);
-
-	clk_disable(nmk_chip->clk);
-
-	return 0;
-}
-
-#ifdef CONFIG_DEBUG_FS
-static int nmk_gpio_get_mode(struct nmk_gpio_chip *nmk_chip, int offset)
-{
-	u32 afunc, bfunc;
-
-	clk_enable(nmk_chip->clk);
-
-	afunc = readl(nmk_chip->addr + NMK_GPIO_AFSLA) & BIT(offset);
-	bfunc = readl(nmk_chip->addr + NMK_GPIO_AFSLB) & BIT(offset);
-
-	clk_disable(nmk_chip->clk);
-
-	return (afunc ? NMK_GPIO_ALT_A : 0) | (bfunc ? NMK_GPIO_ALT_B : 0);
-}
-
-static void nmk_gpio_dbg_show_one(struct seq_file *s,
-	struct pinctrl_dev *pctldev, struct gpio_chip *chip,
-	unsigned offset, unsigned gpio)
-{
-	struct nmk_gpio_chip *nmk_chip = gpiochip_get_data(chip);
-	int mode;
-	bool is_out;
-	bool data_out;
-	bool pull;
-	const char *modes[] = {
-		[NMK_GPIO_ALT_GPIO]	= "gpio",
-		[NMK_GPIO_ALT_A]	= "altA",
-		[NMK_GPIO_ALT_B]	= "altB",
-		[NMK_GPIO_ALT_C]	= "altC",
-		[NMK_GPIO_ALT_C+1]	= "altC1",
-		[NMK_GPIO_ALT_C+2]	= "altC2",
-		[NMK_GPIO_ALT_C+3]	= "altC3",
-		[NMK_GPIO_ALT_C+4]	= "altC4",
-	};
-
-	char *label = gpiochip_dup_line_label(chip, offset);
-	if (IS_ERR(label))
-		return;
-
-	clk_enable(nmk_chip->clk);
-	is_out = !!(readl(nmk_chip->addr + NMK_GPIO_DIR) & BIT(offset));
-	pull = !(readl(nmk_chip->addr + NMK_GPIO_PDIS) & BIT(offset));
-	data_out = !!(readl(nmk_chip->addr + NMK_GPIO_DAT) & BIT(offset));
-	mode = nmk_gpio_get_mode(nmk_chip, offset);
-	if ((mode == NMK_GPIO_ALT_C) && pctldev)
-		mode = nmk_prcm_gpiocr_get_mode(pctldev, gpio);
-
-	if (is_out) {
-		seq_printf(s, " gpio-%-3d (%-20.20s) out %s           %s",
-			   gpio,
-			   label ?: "(none)",
-			   data_out ? "hi" : "lo",
-			   (mode < 0) ? "unknown" : modes[mode]);
-	} else {
-		int irq = chip->to_irq(chip, offset);
-		const int pullidx = pull ? 1 : 0;
-		int val;
-		static const char * const pulls[] = {
-			"none        ",
-			"pull enabled",
-		};
-
-		seq_printf(s, " gpio-%-3d (%-20.20s) in  %s %s",
-			   gpio,
-			   label ?: "(none)",
-			   pulls[pullidx],
-			   (mode < 0) ? "unknown" : modes[mode]);
-
-		val = nmk_gpio_get_input(chip, offset);
-		seq_printf(s, " VAL %d", val);
-
-		/*
-		 * This races with request_irq(), set_irq_type(),
-		 * and set_irq_wake() ... but those are "rare".
-		 */
-		if (irq > 0 && irq_has_action(irq)) {
-			char *trigger;
-			bool wake;
-
-			if (nmk_chip->edge_rising & BIT(offset))
-				trigger = "edge-rising";
-			else if (nmk_chip->edge_falling & BIT(offset))
-				trigger = "edge-falling";
-			else
-				trigger = "edge-undefined";
-
-			wake = !!(nmk_chip->real_wake & BIT(offset));
-
-			seq_printf(s, " irq-%d %s%s",
-				   irq, trigger, wake ? " wakeup" : "");
-		}
-	}
-	clk_disable(nmk_chip->clk);
-}
-
-static void nmk_gpio_dbg_show(struct seq_file *s, struct gpio_chip *chip)
-{
-	unsigned		i;
-	unsigned		gpio = chip->base;
-
-	for (i = 0; i < chip->ngpio; i++, gpio++) {
-		nmk_gpio_dbg_show_one(s, NULL, chip, i, gpio);
-		seq_printf(s, "\n");
-	}
-}
-
-#else
-static inline void nmk_gpio_dbg_show_one(struct seq_file *s,
-					 struct pinctrl_dev *pctldev,
-					 struct gpio_chip *chip,
-					 unsigned offset, unsigned gpio)
-{
-}
-#define nmk_gpio_dbg_show	NULL
-#endif
-
-/*
- * We will allocate memory for the state container using devm* allocators
- * binding to the first device reaching this point, it doesn't matter if
- * it is the pin controller or GPIO driver. However we need to use the right
- * platform device when looking up resources so pay attention to pdev.
- */
-static struct nmk_gpio_chip *nmk_gpio_populate_chip(struct device_node *np,
-						struct platform_device *pdev)
-{
-	struct nmk_gpio_chip *nmk_chip;
-	struct platform_device *gpio_pdev;
-	struct gpio_chip *chip;
-	struct resource *res;
-	struct clk *clk;
-	void __iomem *base;
-	u32 id;
-
-	gpio_pdev = of_find_device_by_node(np);
-	if (!gpio_pdev) {
-		pr_err("populate \"%pOFn\": device not found\n", np);
-		return ERR_PTR(-ENODEV);
-	}
-	if (of_property_read_u32(np, "gpio-bank", &id)) {
-		dev_err(&pdev->dev, "populate: gpio-bank property not found\n");
-		platform_device_put(gpio_pdev);
-		return ERR_PTR(-EINVAL);
-	}
-
-	/* Already populated? */
-	nmk_chip = nmk_gpio_chips[id];
-	if (nmk_chip) {
-		platform_device_put(gpio_pdev);
-		return nmk_chip;
-	}
-
-	nmk_chip = devm_kzalloc(&pdev->dev, sizeof(*nmk_chip), GFP_KERNEL);
-	if (!nmk_chip) {
-		platform_device_put(gpio_pdev);
-		return ERR_PTR(-ENOMEM);
-	}
-
-	nmk_chip->bank = id;
-	chip = &nmk_chip->chip;
-	chip->base = id * NMK_GPIO_PER_CHIP;
-	chip->ngpio = NMK_GPIO_PER_CHIP;
-	chip->label = dev_name(&gpio_pdev->dev);
-	chip->parent = &gpio_pdev->dev;
-
-	res = platform_get_resource(gpio_pdev, IORESOURCE_MEM, 0);
-	base = devm_ioremap_resource(&pdev->dev, res);
-	if (IS_ERR(base)) {
-		platform_device_put(gpio_pdev);
-		return ERR_CAST(base);
-	}
-	nmk_chip->addr = base;
-
-	clk = clk_get(&gpio_pdev->dev, NULL);
-	if (IS_ERR(clk)) {
-		platform_device_put(gpio_pdev);
-		return (void *) clk;
-	}
-	clk_prepare(clk);
-	nmk_chip->clk = clk;
-
-	BUG_ON(nmk_chip->bank >= ARRAY_SIZE(nmk_gpio_chips));
-	nmk_gpio_chips[id] = nmk_chip;
-	return nmk_chip;
-}
-
-static void nmk_gpio_irq_print_chip(struct irq_data *d, struct seq_file *p)
-{
-	struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
-	struct nmk_gpio_chip *nmk_chip = gpiochip_get_data(gc);
-
-	seq_printf(p, "nmk%u-%u-%u", nmk_chip->bank,
-		   gc->base, gc->base + gc->ngpio - 1);
-}
-
-static const struct irq_chip nmk_irq_chip = {
-	.irq_ack = nmk_gpio_irq_ack,
-	.irq_mask = nmk_gpio_irq_mask,
-	.irq_unmask = nmk_gpio_irq_unmask,
-	.irq_set_type = nmk_gpio_irq_set_type,
-	.irq_set_wake = nmk_gpio_irq_set_wake,
-	.irq_startup = nmk_gpio_irq_startup,
-	.irq_shutdown = nmk_gpio_irq_shutdown,
-	.irq_print_chip = nmk_gpio_irq_print_chip,
-	.flags = IRQCHIP_MASK_ON_SUSPEND | IRQCHIP_IMMUTABLE,
-	GPIOCHIP_IRQ_RESOURCE_HELPERS,
-};
-
-static int nmk_gpio_probe(struct platform_device *dev)
-{
-	struct device_node *np = dev->dev.of_node;
-	struct nmk_gpio_chip *nmk_chip;
-	struct gpio_chip *chip;
-	struct gpio_irq_chip *girq;
-	bool supports_sleepmode;
-	int irq;
-	int ret;
-
-	nmk_chip = nmk_gpio_populate_chip(np, dev);
-	if (IS_ERR(nmk_chip)) {
-		dev_err(&dev->dev, "could not populate nmk chip struct\n");
-		return PTR_ERR(nmk_chip);
-	}
-
-	supports_sleepmode =
-		of_property_read_bool(np, "st,supports-sleepmode");
-
-	/* Correct platform device ID */
-	dev->id = nmk_chip->bank;
-
-	irq = platform_get_irq(dev, 0);
-	if (irq < 0)
-		return irq;
-
-	/*
-	 * The virt address in nmk_chip->addr is in the nomadik register space,
-	 * so we can simply convert the resource address, without remapping
-	 */
-	nmk_chip->sleepmode = supports_sleepmode;
-	spin_lock_init(&nmk_chip->lock);
-
-	chip = &nmk_chip->chip;
-	chip->parent = &dev->dev;
-	chip->request = gpiochip_generic_request;
-	chip->free = gpiochip_generic_free;
-	chip->get_direction = nmk_gpio_get_dir;
-	chip->direction_input = nmk_gpio_make_input;
-	chip->get = nmk_gpio_get_input;
-	chip->direction_output = nmk_gpio_make_output;
-	chip->set = nmk_gpio_set_output;
-	chip->dbg_show = nmk_gpio_dbg_show;
-	chip->can_sleep = false;
-	chip->owner = THIS_MODULE;
-
-	girq = &chip->irq;
-	gpio_irq_chip_set_chip(girq, &nmk_irq_chip);
-	girq->parent_handler = nmk_gpio_irq_handler;
-	girq->num_parents = 1;
-	girq->parents = devm_kcalloc(&dev->dev, 1,
-				     sizeof(*girq->parents),
-				     GFP_KERNEL);
-	if (!girq->parents)
-		return -ENOMEM;
-	girq->parents[0] = irq;
-	girq->default_type = IRQ_TYPE_NONE;
-	girq->handler = handle_edge_irq;
-
-	clk_enable(nmk_chip->clk);
-	nmk_chip->lowemi = readl_relaxed(nmk_chip->addr + NMK_GPIO_LOWEMI);
-	clk_disable(nmk_chip->clk);
-
-	ret = gpiochip_add_data(chip, nmk_chip);
-	if (ret)
-		return ret;
-
-	platform_set_drvdata(dev, nmk_chip);
-
-	dev_info(&dev->dev, "chip registered\n");
-
-	return 0;
-}
-
 static int nmk_get_groups_cnt(struct pinctrl_dev *pctldev)
 {
 	struct nmk_pinctrl *npct = pinctrl_dev_get_drvdata(pctldev);
@@ -1197,12 +524,12 @@ static const char *nmk_get_group_name(struct pinctrl_dev *pctldev,
 
 static int nmk_get_group_pins(struct pinctrl_dev *pctldev, unsigned selector,
 			      const unsigned **pins,
-			      unsigned *npins)
+			      unsigned int *num_pins)
 {
 	struct nmk_pinctrl *npct = pinctrl_dev_get_drvdata(pctldev);
 
 	*pins = npct->soc->groups[selector].grp.pins;
-	*npins = npct->soc->groups[selector].grp.npins;
+	*num_pins = npct->soc->groups[selector].grp.npins;
 	return 0;
 }
 
@@ -1533,7 +860,7 @@ static int nmk_pmx_set(struct pinctrl_dev *pctldev, unsigned function,
 {
 	struct nmk_pinctrl *npct = pinctrl_dev_get_drvdata(pctldev);
 	const struct nmk_pingroup *g;
-	static unsigned int slpm[NUM_BANKS];
+	static unsigned int slpm[NMK_MAX_BANKS];
 	unsigned long flags = 0;
 	bool glitch;
 	int ret = -EINVAL;
@@ -1921,19 +1248,6 @@ static int nmk_pinctrl_probe(struct platform_device *pdev)
 	return 0;
 }
 
-static const struct of_device_id nmk_gpio_match[] = {
-	{ .compatible = "st,nomadik-gpio", },
-	{}
-};
-
-static struct platform_driver nmk_gpio_driver = {
-	.driver = {
-		.name = "gpio",
-		.of_match_table = nmk_gpio_match,
-	},
-	.probe = nmk_gpio_probe,
-};
-
 static SIMPLE_DEV_PM_OPS(nmk_pinctrl_pm_ops,
 			nmk_pinctrl_suspend,
 			nmk_pinctrl_resume);
@@ -1947,12 +1261,6 @@ static struct platform_driver nmk_pinctrl_driver = {
 	.probe = nmk_pinctrl_probe,
 };
 
-static int __init nmk_gpio_init(void)
-{
-	return platform_driver_register(&nmk_gpio_driver);
-}
-subsys_initcall(nmk_gpio_init);
-
 static int __init nmk_pinctrl_init(void)
 {
 	return platform_driver_register(&nmk_pinctrl_driver);
diff --git a/drivers/pinctrl/nomadik/pinctrl-nomadik.h b/drivers/pinctrl/nomadik/pinctrl-nomadik.h
deleted file mode 100644
index 1ef2559bc571..000000000000
--- a/drivers/pinctrl/nomadik/pinctrl-nomadik.h
+++ /dev/null
@@ -1,180 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 */
-#ifndef PINCTRL_PINCTRL_NOMADIK_H
-#define PINCTRL_PINCTRL_NOMADIK_H
-
-#include <linux/kernel.h>
-#include <linux/types.h>
-
-#include <linux/pinctrl/pinctrl.h>
-
-/* Package definitions */
-#define PINCTRL_NMK_STN8815	0
-#define PINCTRL_NMK_DB8500	1
-
-/* Alternate functions: function C is set in hw by setting both A and B */
-#define NMK_GPIO_ALT_GPIO	0
-#define NMK_GPIO_ALT_A	1
-#define NMK_GPIO_ALT_B	2
-#define NMK_GPIO_ALT_C	(NMK_GPIO_ALT_A | NMK_GPIO_ALT_B)
-
-#define NMK_GPIO_ALT_CX_SHIFT 2
-#define NMK_GPIO_ALT_C1	((1<<NMK_GPIO_ALT_CX_SHIFT) | NMK_GPIO_ALT_C)
-#define NMK_GPIO_ALT_C2	((2<<NMK_GPIO_ALT_CX_SHIFT) | NMK_GPIO_ALT_C)
-#define NMK_GPIO_ALT_C3	((3<<NMK_GPIO_ALT_CX_SHIFT) | NMK_GPIO_ALT_C)
-#define NMK_GPIO_ALT_C4	((4<<NMK_GPIO_ALT_CX_SHIFT) | NMK_GPIO_ALT_C)
-
-#define PRCM_GPIOCR_ALTCX(pin_num,\
-	altc1_used, altc1_ri, altc1_cb,\
-	altc2_used, altc2_ri, altc2_cb,\
-	altc3_used, altc3_ri, altc3_cb,\
-	altc4_used, altc4_ri, altc4_cb)\
-{\
-	.pin = pin_num,\
-	.altcx[PRCM_IDX_GPIOCR_ALTC1] = {\
-		.used = altc1_used,\
-		.reg_index = altc1_ri,\
-		.control_bit = altc1_cb\
-	},\
-	.altcx[PRCM_IDX_GPIOCR_ALTC2] = {\
-		.used = altc2_used,\
-		.reg_index = altc2_ri,\
-		.control_bit = altc2_cb\
-	},\
-	.altcx[PRCM_IDX_GPIOCR_ALTC3] = {\
-		.used = altc3_used,\
-		.reg_index = altc3_ri,\
-		.control_bit = altc3_cb\
-	},\
-	.altcx[PRCM_IDX_GPIOCR_ALTC4] = {\
-		.used = altc4_used,\
-		.reg_index = altc4_ri,\
-		.control_bit = altc4_cb\
-	},\
-}
-
-/**
- * enum prcm_gpiocr_reg_index
- * Used to reference an PRCM GPIOCR register address.
- */
-enum prcm_gpiocr_reg_index {
-	PRCM_IDX_GPIOCR1,
-	PRCM_IDX_GPIOCR2,
-	PRCM_IDX_GPIOCR3
-};
-/**
- * enum prcm_gpiocr_altcx_index
- * Used to reference an Other alternate-C function.
- */
-enum prcm_gpiocr_altcx_index {
-	PRCM_IDX_GPIOCR_ALTC1,
-	PRCM_IDX_GPIOCR_ALTC2,
-	PRCM_IDX_GPIOCR_ALTC3,
-	PRCM_IDX_GPIOCR_ALTC4,
-	PRCM_IDX_GPIOCR_ALTC_MAX,
-};
-
-/**
- * struct prcm_gpio_altcx - Other alternate-C function
- * @used: other alternate-C function availability
- * @reg_index: PRCM GPIOCR register index used to control the function
- * @control_bit: PRCM GPIOCR bit used to control the function
- */
-struct prcm_gpiocr_altcx {
-	bool used:1;
-	u8 reg_index:2;
-	u8 control_bit:5;
-} __packed;
-
-/**
- * struct prcm_gpio_altcx_pin_desc - Other alternate-C pin
- * @pin: The pin number
- * @altcx: array of other alternate-C[1-4] functions
- */
-struct prcm_gpiocr_altcx_pin_desc {
-	unsigned short pin;
-	struct prcm_gpiocr_altcx altcx[PRCM_IDX_GPIOCR_ALTC_MAX];
-};
-
-/**
- * struct nmk_function - Nomadik pinctrl mux function
- * @name: The name of the function, exported to pinctrl core.
- * @groups: An array of pin groups that may select this function.
- * @ngroups: The number of entries in @groups.
- */
-struct nmk_function {
-	const char *name;
-	const char * const *groups;
-	unsigned ngroups;
-};
-
-/**
- * struct nmk_pingroup - describes a Nomadik pin group
- * @grp: Generic data of the pin group (name and pins)
- * @altsetting: the altsetting to apply to all pins in this group to
- *	configure them to be used by a function
- */
-struct nmk_pingroup {
-	struct pingroup grp;
-	int altsetting;
-};
-
-#define NMK_PIN_GROUP(a, b)							\
-	{									\
-		.grp = PINCTRL_PINGROUP(#a, a##_pins, ARRAY_SIZE(a##_pins)),	\
-		.altsetting = b,						\
-	}
-
-/**
- * struct nmk_pinctrl_soc_data - Nomadik pin controller per-SoC configuration
- * @pins:	An array describing all pins the pin controller affects.
- *		All pins which are also GPIOs must be listed first within the
- *		array, and be numbered identically to the GPIO controller's
- *		numbering.
- * @npins:	The number of entries in @pins.
- * @functions:	The functions supported on this SoC.
- * @nfunction:	The number of entries in @functions.
- * @groups:	An array describing all pin groups the pin SoC supports.
- * @ngroups:	The number of entries in @groups.
- * @altcx_pins:	The pins that support Other alternate-C function on this SoC
- * @npins_altcx: The number of Other alternate-C pins
- * @prcm_gpiocr_registers: The array of PRCM GPIOCR registers on this SoC
- */
-struct nmk_pinctrl_soc_data {
-	const struct pinctrl_pin_desc *pins;
-	unsigned npins;
-	const struct nmk_function *functions;
-	unsigned nfunctions;
-	const struct nmk_pingroup *groups;
-	unsigned ngroups;
-	const struct prcm_gpiocr_altcx_pin_desc *altcx_pins;
-	unsigned npins_altcx;
-	const u16 *prcm_gpiocr_registers;
-};
-
-#ifdef CONFIG_PINCTRL_STN8815
-
-void nmk_pinctrl_stn8815_init(const struct nmk_pinctrl_soc_data **soc);
-
-#else
-
-static inline void
-nmk_pinctrl_stn8815_init(const struct nmk_pinctrl_soc_data **soc)
-{
-}
-
-#endif
-
-#ifdef CONFIG_PINCTRL_DB8500
-
-void nmk_pinctrl_db8500_init(const struct nmk_pinctrl_soc_data **soc);
-
-#else
-
-static inline void
-nmk_pinctrl_db8500_init(const struct nmk_pinctrl_soc_data **soc)
-{
-}
-
-#endif
-
-#endif /* PINCTRL_PINCTRL_NOMADIK_H */