gpio:phytium: Add lock for irq_set_wake function

Add lock for irq_set_wake function to prevent concurrency
access register issue.

Mainline: Open-Source
Signed-off-by: Cui Fulong <cuifulong2112@phytium.com.cn>
Signed-off-by: Li Yuze <liyuze@phytium.com.cn>
Signed-off-by: Wang Yinfeng <wangyinfeng@phytium.com.cn>

Author: newearth-ss

drivers/gpio/gpio-phytium-core.c

@@ -385,6 +385,7 @@ int phytium_gpio_irq_set_wake(struct irq_data *d, unsigned int enable)
 	struct phytium_gpio *gpio = gpiochip_get_data(gc);
 	struct phytium_gpio_ctx *ctx = &gpio->ctx;
 	irq_hw_number_t bit = irqd_to_hwirq(d);
+	unsigned long flags;
 	int ret;
 
 	if (gpio->irq[bit])
@@ -395,6 +396,8 @@ int phytium_gpio_irq_set_wake(struct irq_data *d, unsigned int enable)
 	if (ret < 0)
 		dev_err(gc->parent, "set gpio irq wake failed!\n");
 
+	raw_spin_lock_irqsave(&gpio->lock, flags);
+
 	if (enable) {
 		ctx->wake_en |= BIT(bit);
 		if (gpio->is_resuming == 1) {
@@ -404,6 +407,8 @@ int phytium_gpio_irq_set_wake(struct irq_data *d, unsigned int enable)
 	} else
 		ctx->wake_en &= ~BIT(bit);
 
+	raw_spin_unlock_irqrestore(&gpio->lock, flags);
+
 	return 0;
 }
 EXPORT_SYMBOL_GPL(phytium_gpio_irq_set_wake);