[PATCH 01/42] sh-pfc: Split platform data from the sh_pfc structure

[Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>]

Create a sh_pfc_platform_data structure to store platform data and
reference it from the core sh_pfc structure.

Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
---
 drivers/sh/pfc/core.c    |   89 ++++++++++++++++++++++------------------------
 drivers/sh/pfc/gpio.c    |   19 +++++-----
 drivers/sh/pfc/pinctrl.c |   27 +++++++-------
 include/linux/sh_pfc.h   |   20 ++++++----
 4 files changed, 79 insertions(+), 76 deletions(-)

diff --git a/drivers/sh/pfc/core.c b/drivers/sh/pfc/core.c
index 6816937..ecbe51d 100644
--- a/drivers/sh/pfc/core.c
+++ b/drivers/sh/pfc/core.c
@@ -21,18 +21,13 @@
 #include <linux/ioport.h>
 #include <linux/pinctrl/machine.h>
 
-static struct sh_pfc *sh_pfc __read_mostly;
-
-static inline bool sh_pfc_initialized(void)
-{
-	return !!sh_pfc;
-}
+static struct sh_pfc sh_pfc __read_mostly;
 
 static void pfc_iounmap(struct sh_pfc *pfc)
 {
 	int k;
 
-	for (k = 0; k < pfc->num_resources; k++)
+	for (k = 0; k < pfc->pdata->num_resources; k++)
 		if (pfc->window[k].virt)
 			iounmap(pfc->window[k].virt);
 
@@ -45,16 +40,16 @@ static int pfc_ioremap(struct sh_pfc *pfc)
 	struct resource *res;
 	int k;
 
-	if (!pfc->num_resources)
+	if (!pfc->pdata->num_resources)
 		return 0;
 
-	pfc->window = kzalloc(pfc->num_resources * sizeof(*pfc->window),
+	pfc->window = kzalloc(pfc->pdata->num_resources * sizeof(*pfc->window),
 			      GFP_NOWAIT);
 	if (!pfc->window)
 		goto err1;
 
-	for (k = 0; k < pfc->num_resources; k++) {
-		res = pfc->resource + k;
+	for (k = 0; k < pfc->pdata->num_resources; k++) {
+		res = pfc->pdata->resource + k;
 		WARN_ON(resource_type(res) != IORESOURCE_MEM);
 		pfc->window[k].phys = res->start;
 		pfc->window[k].size = resource_size(res);
@@ -79,7 +74,7 @@ static void __iomem *pfc_phys_to_virt(struct sh_pfc *pfc,
 	int k;
 
 	/* scan through physical windows and convert address */
-	for (k = 0; k < pfc->num_resources; k++) {
+	for (k = 0; k < pfc->pdata->num_resources; k++) {
 		window = pfc->window + k;
 
 		if (address < window->phys)
@@ -232,8 +227,8 @@ static void write_config_reg(struct sh_pfc *pfc,
 	data &= mask;
 	data |= value;
 
-	if (pfc->unlock_reg)
-		gpio_write_raw_reg(pfc_phys_to_virt(pfc, pfc->unlock_reg),
+	if (pfc->pdata->unlock_reg)
+		gpio_write_raw_reg(pfc_phys_to_virt(pfc, pfc->pdata->unlock_reg),
 				   32, ~data);
 
 	gpio_write_raw_reg(mapped_reg, crp->reg_width, data);
@@ -241,16 +236,16 @@ static void write_config_reg(struct sh_pfc *pfc,
 
 static int setup_data_reg(struct sh_pfc *pfc, unsigned gpio)
 {
-	struct pinmux_gpio *gpiop = &pfc->gpios[gpio];
+	struct pinmux_gpio *gpiop = &pfc->pdata->gpios[gpio];
 	struct pinmux_data_reg *data_reg;
 	int k, n;
 
-	if (!enum_in_range(gpiop->enum_id, &pfc->data))
+	if (!enum_in_range(gpiop->enum_id, &pfc->pdata->data))
 		return -1;
 
 	k = 0;
 	while (1) {
-		data_reg = pfc->data_regs + k;
+		data_reg = pfc->pdata->data_regs + k;
 
 		if (!data_reg->reg_width)
 			break;
@@ -279,12 +274,12 @@ static void setup_data_regs(struct sh_pfc *pfc)
 	struct pinmux_data_reg *drp;
 	int k;
 
-	for (k = pfc->first_gpio; k <= pfc->last_gpio; k++)
+	for (k = pfc->pdata->first_gpio; k <= pfc->pdata->last_gpio; k++)
 		setup_data_reg(pfc, k);
 
 	k = 0;
 	while (1) {
-		drp = pfc->data_regs + k;
+		drp = pfc->pdata->data_regs + k;
 
 		if (!drp->reg_width)
 			break;
@@ -298,15 +293,15 @@ static void setup_data_regs(struct sh_pfc *pfc)
 int sh_pfc_get_data_reg(struct sh_pfc *pfc, unsigned gpio,
 			struct pinmux_data_reg **drp, int *bitp)
 {
-	struct pinmux_gpio *gpiop = &pfc->gpios[gpio];
+	struct pinmux_gpio *gpiop = &pfc->pdata->gpios[gpio];
 	int k, n;
 
-	if (!enum_in_range(gpiop->enum_id, &pfc->data))
+	if (!enum_in_range(gpiop->enum_id, &pfc->pdata->data))
 		return -1;
 
 	k = (gpiop->flags & PINMUX_FLAG_DREG) >> PINMUX_FLAG_DREG_SHIFT;
 	n = (gpiop->flags & PINMUX_FLAG_DBIT) >> PINMUX_FLAG_DBIT_SHIFT;
-	*drp = pfc->data_regs + k;
+	*drp = pfc->pdata->data_regs + k;
 	*bitp = n;
 	return 0;
 }
@@ -323,7 +318,7 @@ static int get_config_reg(struct sh_pfc *pfc, pinmux_enum_t enum_id,
 
 	k = 0;
 	while (1) {
-		config_reg = pfc->cfg_regs + k;
+		config_reg = pfc->pdata->cfg_regs + k;
 
 		r_width = config_reg->reg_width;
 		f_width = config_reg->field_width;
@@ -361,12 +356,12 @@ static int get_config_reg(struct sh_pfc *pfc, pinmux_enum_t enum_id,
 int sh_pfc_gpio_to_enum(struct sh_pfc *pfc, unsigned gpio, int pos,
 			pinmux_enum_t *enum_idp)
 {
-	pinmux_enum_t enum_id = pfc->gpios[gpio].enum_id;
-	pinmux_enum_t *data = pfc->gpio_data;
+	pinmux_enum_t enum_id = pfc->pdata->gpios[gpio].enum_id;
+	pinmux_enum_t *data = pfc->pdata->gpio_data;
 	int k;
 
-	if (!enum_in_range(enum_id, &pfc->data)) {
-		if (!enum_in_range(enum_id, &pfc->mark)) {
+	if (!enum_in_range(enum_id, &pfc->pdata->data)) {
+		if (!enum_in_range(enum_id, &pfc->pdata->mark)) {
 			pr_err("non data/mark enum_id for gpio %d\n", gpio);
 			return -1;
 		}
@@ -377,7 +372,7 @@ int sh_pfc_gpio_to_enum(struct sh_pfc *pfc, unsigned gpio, int pos,
 		return pos + 1;
 	}
 
-	for (k = 0; k < pfc->gpio_data_size; k++) {
+	for (k = 0; k < pfc->pdata->gpio_data_size; k++) {
 		if (data[k] == enum_id) {
 			*enum_idp = data[k + 1];
 			return k + 1;
@@ -405,19 +400,19 @@ int sh_pfc_config_gpio(struct sh_pfc *pfc, unsigned gpio, int pinmux_type,
 		break;
 
 	case PINMUX_TYPE_OUTPUT:
-		range = &pfc->output;
+		range = &pfc->pdata->output;
 		break;
 
 	case PINMUX_TYPE_INPUT:
-		range = &pfc->input;
+		range = &pfc->pdata->input;
 		break;
 
 	case PINMUX_TYPE_INPUT_PULLUP:
-		range = &pfc->input_pu;
+		range = &pfc->pdata->input_pu;
 		break;
 
 	case PINMUX_TYPE_INPUT_PULLDOWN:
-		range = &pfc->input_pd;
+		range = &pfc->pdata->input_pd;
 		break;
 
 	default:
@@ -437,7 +432,7 @@ int sh_pfc_config_gpio(struct sh_pfc *pfc, unsigned gpio, int pinmux_type,
 			break;
 
 		/* first check if this is a function enum */
-		in_range = enum_in_range(enum_id, &pfc->function);
+		in_range = enum_in_range(enum_id, &pfc->pdata->function);
 		if (!in_range) {
 			/* not a function enum */
 			if (range) {
@@ -502,7 +497,7 @@ int sh_pfc_config_gpio(struct sh_pfc *pfc, unsigned gpio, int pinmux_type,
 }
 EXPORT_SYMBOL_GPL(sh_pfc_config_gpio);
 
-int register_sh_pfc(struct sh_pfc *pfc)
+int register_sh_pfc(struct sh_pfc_platform_data *pdata)
 {
 	int (*initroutine)(struct sh_pfc *) = NULL;
 	int ret;
@@ -512,26 +507,28 @@ int register_sh_pfc(struct sh_pfc *pfc)
 	 */
 	BUILD_BUG_ON(PINMUX_FLAG_TYPE > ((1 << PINMUX_FLAG_DBIT_SHIFT) - 1));
 
-	if (sh_pfc)
+	if (sh_pfc.pdata)
 		return -EBUSY;
 
-	ret = pfc_ioremap(pfc);
-	if (unlikely(ret < 0))
+	sh_pfc.pdata = pdata;
+
+	ret = pfc_ioremap(&sh_pfc);
+	if (unlikely(ret < 0)) {
+		sh_pfc.pdata = NULL;
 		return ret;
+	}
 
-	spin_lock_init(&pfc->lock);
+	spin_lock_init(&sh_pfc.lock);
 
 	pinctrl_provide_dummies();
-	setup_data_regs(pfc);
-
-	sh_pfc = pfc;
+	setup_data_regs(&sh_pfc);
 
 	/*
 	 * Initialize pinctrl bindings first
 	 */
 	initroutine = symbol_request(sh_pfc_register_pinctrl);
 	if (initroutine) {
-		ret = (*initroutine)(pfc);
+		ret = (*initroutine)(&sh_pfc);
 		symbol_put_addr(initroutine);
 
 		if (unlikely(ret != 0))
@@ -546,7 +543,7 @@ int register_sh_pfc(struct sh_pfc *pfc)
 	 */
 	initroutine = symbol_request(sh_pfc_register_gpiochip);
 	if (initroutine) {
-		ret = (*initroutine)(pfc);
+		ret = (*initroutine)(&sh_pfc);
 		symbol_put_addr(initroutine);
 
 		/*
@@ -560,13 +557,13 @@ int register_sh_pfc(struct sh_pfc *pfc)
 		}
 	}
 
-	pr_info("%s support registered\n", pfc->name);
+	pr_info("%s support registered\n", sh_pfc.pdata->name);
 
 	return 0;
 
 err:
-	pfc_iounmap(pfc);
-	sh_pfc = NULL;
+	pfc_iounmap(&sh_pfc);
+	sh_pfc.pdata = NULL;
 
 	return ret;
 }
diff --git a/drivers/sh/pfc/gpio.c b/drivers/sh/pfc/gpio.c
index 038fa07..9b7e45c 100644
--- a/drivers/sh/pfc/gpio.c
+++ b/drivers/sh/pfc/gpio.c
@@ -103,11 +103,11 @@ static int sh_gpio_to_irq(struct gpio_chip *gc, unsigned offset)
 		if (pos <= 0 || !enum_id)
 			break;
 
-		for (i = 0; i < pfc->gpio_irq_size; i++) {
-			enum_ids = pfc->gpio_irq[i].enum_ids;
+		for (i = 0; i < pfc->pdata->gpio_irq_size; i++) {
+			enum_ids = pfc->pdata->gpio_irq[i].enum_ids;
 			for (k = 0; enum_ids[k]; k++) {
 				if (enum_ids[k] == enum_id)
-					return pfc->gpio_irq[i].irq;
+					return pfc->pdata->gpio_irq[i].irq;
 			}
 		}
 	}
@@ -128,12 +128,12 @@ static void sh_pfc_gpio_setup(struct sh_pfc_chip *chip)
 	gc->set = sh_gpio_set;
 	gc->to_irq = sh_gpio_to_irq;
 
-	WARN_ON(pfc->first_gpio != 0); /* needs testing */
+	WARN_ON(pfc->pdata->first_gpio != 0); /* needs testing */
 
-	gc->label = pfc->name;
+	gc->label = pfc->pdata->name;
 	gc->owner = THIS_MODULE;
-	gc->base = pfc->first_gpio;
-	gc->ngpio = (pfc->last_gpio - pfc->first_gpio) + 1;
+	gc->base = pfc->pdata->first_gpio;
+	gc->ngpio = (pfc->pdata->last_gpio - pfc->pdata->first_gpio) + 1;
 }
 
 int sh_pfc_register_gpiochip(struct sh_pfc *pfc)
@@ -154,7 +154,8 @@ int sh_pfc_register_gpiochip(struct sh_pfc *pfc)
 		kfree(chip);
 
 	pr_info("%s handling gpio %d -> %d\n",
-		pfc->name, pfc->first_gpio, pfc->last_gpio);
+		pfc->pdata->name, pfc->pdata->first_gpio,
+		pfc->pdata->last_gpio);
 
 	return ret;
 }
@@ -179,7 +180,7 @@ static int __devinit sh_pfc_gpio_probe(struct platform_device *pdev)
 	chip = gpio_to_pfc_chip(gc);
 	platform_set_drvdata(pdev, chip);
 
-	pr_info("attaching to GPIO chip %s\n", chip->pfc->name);
+	pr_info("attaching to GPIO chip %s\n", chip->pfc->pdata->name);
 
 	return 0;
 }
diff --git a/drivers/sh/pfc/pinctrl.c b/drivers/sh/pfc/pinctrl.c
index 0646bf6..447fb60 100644
--- a/drivers/sh/pfc/pinctrl.c
+++ b/drivers/sh/pfc/pinctrl.c
@@ -140,7 +140,7 @@ static int sh_pfc_reconfig_pin(struct sh_pfc *pfc, unsigned offset,
 
 	spin_lock_irqsave(&pfc->lock, flags);
 
-	pinmux_type = pfc->gpios[offset].flags & PINMUX_FLAG_TYPE;
+	pinmux_type = pfc->pdata->gpios[offset].flags & PINMUX_FLAG_TYPE;
 
 	/*
 	 * See if the present config needs to first be de-configured.
@@ -172,8 +172,8 @@ static int sh_pfc_reconfig_pin(struct sh_pfc *pfc, unsigned offset,
 			       GPIO_CFG_REQ) != 0)
 		goto err;
 
-	pfc->gpios[offset].flags &= ~PINMUX_FLAG_TYPE;
-	pfc->gpios[offset].flags |= new_type;
+	pfc->pdata->gpios[offset].flags &= ~PINMUX_FLAG_TYPE;
+	pfc->pdata->gpios[offset].flags |= new_type;
 
 	ret = 0;
 
@@ -195,7 +195,7 @@ static int sh_pfc_gpio_request_enable(struct pinctrl_dev *pctldev,
 
 	spin_lock_irqsave(&pfc->lock, flags);
 
-	pinmux_type = pfc->gpios[offset].flags & PINMUX_FLAG_TYPE;
+	pinmux_type = pfc->pdata->gpios[offset].flags & PINMUX_FLAG_TYPE;
 
 	switch (pinmux_type) {
 	case PINMUX_TYPE_FUNCTION:
@@ -236,7 +236,7 @@ static void sh_pfc_gpio_disable_free(struct pinctrl_dev *pctldev,
 
 	spin_lock_irqsave(&pfc->lock, flags);
 
-	pinmux_type = pfc->gpios[offset].flags & PINMUX_FLAG_TYPE;
+	pinmux_type = pfc->pdata->gpios[offset].flags & PINMUX_FLAG_TYPE;
 
 	sh_pfc_config_gpio(pfc, offset, pinmux_type, GPIO_CFG_FREE);
 
@@ -270,7 +270,7 @@ static int sh_pfc_pinconf_get(struct pinctrl_dev *pctldev, unsigned pin,
 	struct sh_pfc_pinctrl *pmx = pinctrl_dev_get_drvdata(pctldev);
 	struct sh_pfc *pfc = pmx->pfc;
 
-	*config = pfc->gpios[pin].flags & PINMUX_FLAG_TYPE;
+	*config = pfc->pdata->gpios[pin].flags & PINMUX_FLAG_TYPE;
 
 	return 0;
 }
@@ -357,7 +357,7 @@ static int __devinit sh_pfc_map_gpios(struct sh_pfc *pfc,
 	unsigned long flags;
 	int i;
 
-	pmx->nr_pads = pfc->last_gpio - pfc->first_gpio + 1;
+	pmx->nr_pads = pfc->pdata->last_gpio - pfc->pdata->first_gpio + 1;
 
 	pmx->pads = kmalloc(sizeof(struct pinctrl_pin_desc) * pmx->nr_pads,
 			    GFP_KERNEL);
@@ -376,9 +376,9 @@ static int __devinit sh_pfc_map_gpios(struct sh_pfc *pfc,
 	 */
 	for (i = 0; i < pmx->nr_pads; i++) {
 		struct pinctrl_pin_desc *pin = pmx->pads + i;
-		struct pinmux_gpio *gpio = pfc->gpios + i;
+		struct pinmux_gpio *gpio = pfc->pdata->gpios + i;
 
-		pin->number = pfc->first_gpio + i;
+		pin->number = pfc->pdata->first_gpio + i;
 		pin->name = gpio->name;
 
 		/* XXX */
@@ -410,7 +410,7 @@ static int __devinit sh_pfc_map_functions(struct sh_pfc *pfc,
 	spin_lock_irqsave(&pmx->lock, flags);
 
 	for (i = fn = 0; i < pmx->nr_pads; i++) {
-		struct pinmux_gpio *gpio = pfc->gpios + i;
+		struct pinmux_gpio *gpio = pfc->pdata->gpios + i;
 
 		if ((gpio->flags & PINMUX_FLAG_TYPE) == PINMUX_TYPE_FUNCTION)
 			pmx->functions[fn++] = gpio;
@@ -446,9 +446,10 @@ static int __devinit sh_pfc_pinctrl_probe(struct platform_device *pdev)
 		goto free_functions;
 	}
 
-	sh_pfc_gpio_range.npins = pfc->last_gpio - pfc->first_gpio + 1;
-	sh_pfc_gpio_range.base = pfc->first_gpio;
-	sh_pfc_gpio_range.pin_base = pfc->first_gpio;
+	sh_pfc_gpio_range.npins = pfc->pdata->last_gpio
+				- pfc->pdata->first_gpio + 1;
+	sh_pfc_gpio_range.base = pfc->pdata->first_gpio;
+	sh_pfc_gpio_range.pin_base = pfc->pdata->first_gpio;
 
 	pinctrl_add_gpio_range(sh_pfc_pmx->pctl, &sh_pfc_gpio_range);
 
diff --git a/include/linux/sh_pfc.h b/include/linux/sh_pfc.h
index c19a092..58587f9 100644
--- a/include/linux/sh_pfc.h
+++ b/include/linux/sh_pfc.h
@@ -94,7 +94,7 @@ struct pfc_window {
 	unsigned long size;
 };
 
-struct sh_pfc {
+struct sh_pfc_platform_data {
 	char *name;
 	pinmux_enum_t reserved_id;
 	struct pinmux_range data;
@@ -117,17 +117,21 @@ struct sh_pfc {
 	struct pinmux_irq *gpio_irq;
 	unsigned int gpio_irq_size;
 
-	spinlock_t lock;
-
 	struct resource *resource;
 	unsigned int num_resources;
-	struct pfc_window *window;
 
 	unsigned long unlock_reg;
 };
 
+struct sh_pfc {
+	struct sh_pfc_platform_data *pdata;
+	spinlock_t lock;
+
+	struct pfc_window *window;
+};
+
 /* XXX compat for now */
-#define pinmux_info sh_pfc
+#define pinmux_info sh_pfc_platform_data
 
 /* drivers/sh/pfc/gpio.c */
 int sh_pfc_register_gpiochip(struct sh_pfc *pfc);
@@ -136,7 +140,7 @@ int sh_pfc_register_gpiochip(struct sh_pfc *pfc);
 int sh_pfc_register_pinctrl(struct sh_pfc *pfc);
 
 /* drivers/sh/pfc/core.c */
-int register_sh_pfc(struct sh_pfc *pfc);
+int register_sh_pfc(struct sh_pfc_platform_data *pfc);
 
 int sh_pfc_read_bit(struct pinmux_data_reg *dr, unsigned long in_pos);
 void sh_pfc_write_bit(struct pinmux_data_reg *dr, unsigned long in_pos,
@@ -151,8 +155,8 @@ int sh_pfc_config_gpio(struct sh_pfc *pfc, unsigned gpio, int pinmux_type,
 /* xxx */
 static inline int register_pinmux(struct pinmux_info *pip)
 {
-	struct sh_pfc *pfc = pip;
-	return register_sh_pfc(pfc);
+	struct sh_pfc_platform_data *pdata = pip;
+	return register_sh_pfc(pdata);
 }
 
 enum { GPIO_CFG_DRYRUN, GPIO_CFG_REQ, GPIO_CFG_FREE };
-- 
1.7.8.6