gpio: tegra: Use unsigned int where possible

In most of the cases, integers in this file can't be negative, so the
type can be more restricted for clarity.
Signed-off-by: Thierry Reding <treding@nvidia.com>
Acked-by: Jon Hunter <jonathanh@nvidia.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

drivers/gpio/gpio-tegra.c

@@ -67,8 +67,8 @@
 struct tegra_gpio_info;
 
 struct tegra_gpio_bank {
-	int bank;
-	int irq;
+	unsigned int bank;
+	unsigned int irq;
 	spinlock_t lvl_lock[4];
 	spinlock_t dbc_lock[4];	/* Lock for updating debounce count register */
 #ifdef CONFIG_PM_SLEEP
@@ -112,13 +112,14 @@ static inline u32 tegra_gpio_readl(struct tegra_gpio_info *tgi, u32 reg)
 	return __raw_readl(tgi->regs + reg);
 }
 
-static int tegra_gpio_compose(int bank, int port, int bit)
+static unsigned int tegra_gpio_compose(unsigned int bank, unsigned int port,
+				       unsigned int bit)
 {
 	return (bank << 5) | ((port & 0x3) << 3) | (bit & 0x7);
 }
 
 static void tegra_gpio_mask_write(struct tegra_gpio_info *tgi, u32 reg,
-				  int gpio, int value)
+				  unsigned int gpio, u32 value)
 {
 	u32 val;
 
@@ -128,12 +129,12 @@ static void tegra_gpio_mask_write(struct tegra_gpio_info *tgi, u32 reg,
 	tegra_gpio_writel(tgi, val, reg);
 }
 
-static void tegra_gpio_enable(struct tegra_gpio_info *tgi, int gpio)
+static void tegra_gpio_enable(struct tegra_gpio_info *tgi, unsigned int gpio)
 {
 	tegra_gpio_mask_write(tgi, GPIO_MSK_CNF(tgi, gpio), gpio, 1);
 }
 
-static void tegra_gpio_disable(struct tegra_gpio_info *tgi, int gpio)
+static void tegra_gpio_disable(struct tegra_gpio_info *tgi, unsigned int gpio)
 {
 	tegra_gpio_mask_write(tgi, GPIO_MSK_CNF(tgi, gpio), gpio, 0);
 }
@@ -162,7 +163,7 @@ static void tegra_gpio_set(struct gpio_chip *chip, unsigned int offset,
 static int tegra_gpio_get(struct gpio_chip *chip, unsigned int offset)
 {
 	struct tegra_gpio_info *tgi = gpiochip_get_data(chip);
-	int bval = BIT(GPIO_BIT(offset));
+	unsigned int bval = BIT(GPIO_BIT(offset));
 
 	/* If gpio is in output mode then read from the out value */
 	if (tegra_gpio_readl(tgi, GPIO_OE(tgi, offset)) & bval)
@@ -216,7 +217,7 @@ static int tegra_gpio_set_debounce(struct gpio_chip *chip, unsigned int offset,
 	struct tegra_gpio_bank *bank = &tgi->bank_info[GPIO_BANK(offset)];
 	unsigned int debounce_ms = DIV_ROUND_UP(debounce, 1000);
 	unsigned long flags;
-	int port;
+	unsigned int port;
 
 	if (!debounce_ms) {
 		tegra_gpio_mask_write(tgi, GPIO_MSK_DBC_EN(tgi, offset),
@@ -265,7 +266,7 @@ static void tegra_gpio_irq_ack(struct irq_data *d)
 {
 	struct tegra_gpio_bank *bank = irq_data_get_irq_chip_data(d);
 	struct tegra_gpio_info *tgi = bank->tgi;
-	int gpio = d->hwirq;
+	unsigned int gpio = d->hwirq;
 
 	tegra_gpio_writel(tgi, 1 << GPIO_BIT(gpio), GPIO_INT_CLR(tgi, gpio));
 }
@@ -274,7 +275,7 @@ static void tegra_gpio_irq_mask(struct irq_data *d)
 {
 	struct tegra_gpio_bank *bank = irq_data_get_irq_chip_data(d);
 	struct tegra_gpio_info *tgi = bank->tgi;
-	int gpio = d->hwirq;
+	unsigned int gpio = d->hwirq;
 
 	tegra_gpio_mask_write(tgi, GPIO_MSK_INT_ENB(tgi, gpio), gpio, 0);
 }
@@ -283,20 +284,18 @@ static void tegra_gpio_irq_unmask(struct irq_data *d)
 {
 	struct tegra_gpio_bank *bank = irq_data_get_irq_chip_data(d);
 	struct tegra_gpio_info *tgi = bank->tgi;
-	int gpio = d->hwirq;
+	unsigned int gpio = d->hwirq;
 
 	tegra_gpio_mask_write(tgi, GPIO_MSK_INT_ENB(tgi, gpio), gpio, 1);
 }
 
 static int tegra_gpio_irq_set_type(struct irq_data *d, unsigned int type)
 {
-	int gpio = d->hwirq;
+	unsigned int gpio = d->hwirq, port = GPIO_PORT(gpio), lvl_type;
 	struct tegra_gpio_bank *bank = irq_data_get_irq_chip_data(d);
 	struct tegra_gpio_info *tgi = bank->tgi;
-	int port = GPIO_PORT(gpio);
-	int lvl_type;
-	int val;
 	unsigned long flags;
+	u32 val;
 	int ret;
 
 	switch (type & IRQ_TYPE_SENSE_MASK) {
@@ -327,7 +326,7 @@ static int tegra_gpio_irq_set_type(struct irq_data *d, unsigned int type)
 	ret = gpiochip_lock_as_irq(&tgi->gc, gpio);
 	if (ret) {
 		dev_err(tgi->dev,
-			"unable to lock Tegra GPIO %d as IRQ\n", gpio);
+			"unable to lock Tegra GPIO %u as IRQ\n", gpio);
 		return ret;
 	}
 
@@ -355,17 +354,15 @@ static void tegra_gpio_irq_shutdown(struct irq_data *d)
 {
 	struct tegra_gpio_bank *bank = irq_data_get_irq_chip_data(d);
 	struct tegra_gpio_info *tgi = bank->tgi;
-	int gpio = d->hwirq;
+	unsigned int gpio = d->hwirq;
 
 	gpiochip_unlock_as_irq(&tgi->gc, gpio);
 }
 
 static void tegra_gpio_irq_handler(struct irq_desc *desc)
 {
-	int port;
-	int pin;
+	unsigned int port, pin, gpio;
 	bool unmasked = false;
-	int gpio;
 	u32 lvl;
 	unsigned long sta;
 	struct irq_chip *chip = irq_desc_get_chip(desc);
@@ -409,8 +406,7 @@ static int tegra_gpio_resume(struct device *dev)
 	struct platform_device *pdev = to_platform_device(dev);
 	struct tegra_gpio_info *tgi = platform_get_drvdata(pdev);
 	unsigned long flags;
-	int b;
-	int p;
+	unsigned int b, p;
 
 	local_irq_save(flags);
 
@@ -450,8 +446,7 @@ static int tegra_gpio_suspend(struct device *dev)
 	struct platform_device *pdev = to_platform_device(dev);
 	struct tegra_gpio_info *tgi = platform_get_drvdata(pdev);
 	unsigned long flags;
-	int b;
-	int p;
+	unsigned int b, p;
 
 	local_irq_save(flags);
 	for (b = 0; b < tgi->bank_count; b++) {
@@ -490,7 +485,7 @@ static int tegra_gpio_suspend(struct device *dev)
 static int tegra_gpio_irq_set_wake(struct irq_data *d, unsigned int enable)
 {
 	struct tegra_gpio_bank *bank = irq_data_get_irq_chip_data(d);
-	int gpio = d->hwirq;
+	unsigned int gpio = d->hwirq;
 	u32 port, bit, mask;
 
 	port = GPIO_PORT(gpio);
@@ -514,15 +509,14 @@ static int tegra_gpio_irq_set_wake(struct irq_data *d, unsigned int enable)
 static int dbg_gpio_show(struct seq_file *s, void *unused)
 {
 	struct tegra_gpio_info *tgi = s->private;
-	int i;
-	int j;
+	unsigned int i, j;
 
 	for (i = 0; i < tgi->bank_count; i++) {
 		for (j = 0; j < 4; j++) {
-			int gpio = tegra_gpio_compose(i, j, 0);
+			unsigned int gpio = tegra_gpio_compose(i, j, 0);
 
 			seq_printf(s,
-				"%d:%d %02x %02x %02x %02x %02x %02x %06x\n",
+				"%u:%u %02x %02x %02x %02x %02x %02x %06x\n",
 				i, j,
 				tegra_gpio_readl(tgi, GPIO_CNF(tgi, gpio)),
 				tegra_gpio_readl(tgi, GPIO_OE(tgi, gpio)),
@@ -577,10 +571,8 @@ static int tegra_gpio_probe(struct platform_device *pdev)
 	struct tegra_gpio_info *tgi;
 	struct resource *res;
 	struct tegra_gpio_bank *bank;
+	unsigned int gpio, i, j;
 	int ret;
-	int gpio;
-	int i;
-	int j;
 
 	tgi = devm_kzalloc(&pdev->dev, sizeof(*tgi), GFP_KERNEL);
 	if (!tgi)