gpio fixes for v6.2-rc6

- fix the -c option in the gpio-event-mode user-space example program
 - fix the irq number translation in gpio-ep93xx and make its irqchip immutable
 - add a missing spin_unlock in error path in gpio-mxc
 - fix a suspend breakage on System76 and Lenovo Gen2a introduced in GPIO ACPI
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Merge tag 'gpio-fixes-for-v6.2-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/brgl/linux

Pull gpio fixes from Bartosz Golaszewski:

 - fix the -c option in the gpio-event-mode user-space example program

 - fix the irq number translation in gpio-ep93xx and make its irqchip
   immutable

 - add a missing spin_unlock in error path in gpio-mxc

 - fix a suspend breakage on System76 and Lenovo Gen2a introduced in
   GPIO ACPI

* tag 'gpio-fixes-for-v6.2-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/brgl/linux:
  tools: gpio: fix -c option of gpio-event-mon
  gpio: ep93xx: remove unused variable
  gpio: ep93xx: Make irqchip immutable
  gpio: ep93xx: Fix port F hwirq numbers in handler
  gpio: mxc: Unlock on error path in mxc_flip_edge()
  gpiolib-acpi: Don't set GPIOs for wakeup in S3 mode

drivers/gpio/gpio-ep93xx.c

@@ -17,6 +17,7 @@
 #include <linux/slab.h>
 #include <linux/gpio/driver.h>
 #include <linux/bitops.h>
+#include <linux/seq_file.h>
 
 #define EP93XX_GPIO_F_INT_STATUS 0x5c
 #define EP93XX_GPIO_A_INT_STATUS 0xa0
@@ -40,7 +41,6 @@
 #define EP93XX_GPIO_F_IRQ_BASE 80
 
 struct ep93xx_gpio_irq_chip {
-	struct irq_chip ic;
 	u8 irq_offset;
 	u8 int_unmasked;
 	u8 int_enabled;
@@ -148,7 +148,7 @@ static void ep93xx_gpio_f_irq_handler(struct irq_desc *desc)
 	 */
 	struct irq_chip *irqchip = irq_desc_get_chip(desc);
 	unsigned int irq = irq_desc_get_irq(desc);
-	int port_f_idx = ((irq + 1) & 7) ^ 4; /* {19..22,47..50} -> {0..7} */
+	int port_f_idx = (irq & 7) ^ 4; /* {20..23,48..51} -> {0..7} */
 	int gpio_irq = EP93XX_GPIO_F_IRQ_BASE + port_f_idx;
 
 	chained_irq_enter(irqchip, desc);
@@ -185,6 +185,7 @@ static void ep93xx_gpio_irq_mask_ack(struct irq_data *d)
 	ep93xx_gpio_update_int_params(epg, eic);
 
 	writeb(port_mask, epg->base + eic->irq_offset + EP93XX_INT_EOI_OFFSET);
+	gpiochip_disable_irq(gc, irqd_to_hwirq(d));
 }
 
 static void ep93xx_gpio_irq_mask(struct irq_data *d)
@@ -195,6 +196,7 @@ static void ep93xx_gpio_irq_mask(struct irq_data *d)
 
 	eic->int_unmasked &= ~BIT(d->irq & 7);
 	ep93xx_gpio_update_int_params(epg, eic);
+	gpiochip_disable_irq(gc, irqd_to_hwirq(d));
 }
 
 static void ep93xx_gpio_irq_unmask(struct irq_data *d)
@@ -203,6 +205,7 @@ static void ep93xx_gpio_irq_unmask(struct irq_data *d)
 	struct ep93xx_gpio_irq_chip *eic = to_ep93xx_gpio_irq_chip(gc);
 	struct ep93xx_gpio *epg = gpiochip_get_data(gc);
 
+	gpiochip_enable_irq(gc, irqd_to_hwirq(d));
 	eic->int_unmasked |= BIT(d->irq & 7);
 	ep93xx_gpio_update_int_params(epg, eic);
 }
@@ -320,15 +323,25 @@ static int ep93xx_gpio_set_config(struct gpio_chip *gc, unsigned offset,
 	return 0;
 }
 
-static void ep93xx_init_irq_chip(struct device *dev, struct irq_chip *ic)
+static void ep93xx_irq_print_chip(struct irq_data *data, struct seq_file *p)
 {
-	ic->irq_ack = ep93xx_gpio_irq_ack;
+	struct gpio_chip *gc = irq_data_get_irq_chip_data(data);
-	ic->irq_mask_ack = ep93xx_gpio_irq_mask_ack;
+
-	ic->irq_mask = ep93xx_gpio_irq_mask;
+	seq_printf(p, dev_name(gc->parent));
-	ic->irq_unmask = ep93xx_gpio_irq_unmask;
-	ic->irq_set_type = ep93xx_gpio_irq_type;
 }
 
+static const struct irq_chip gpio_eic_irq_chip = {
+	.name			= "ep93xx-gpio-eic",
+	.irq_ack		= ep93xx_gpio_irq_ack,
+	.irq_mask		= ep93xx_gpio_irq_mask,
+	.irq_unmask		= ep93xx_gpio_irq_unmask,
+	.irq_mask_ack	= ep93xx_gpio_irq_mask_ack,
+	.irq_set_type	= ep93xx_gpio_irq_type,
+	.irq_print_chip	= ep93xx_irq_print_chip,
+	.flags			= IRQCHIP_IMMUTABLE,
+	GPIOCHIP_IRQ_RESOURCE_HELPERS,
+};
+
 static int ep93xx_gpio_add_bank(struct ep93xx_gpio_chip *egc,
 				struct platform_device *pdev,
 				struct ep93xx_gpio *epg,
@@ -350,8 +363,6 @@ static int ep93xx_gpio_add_bank(struct ep93xx_gpio_chip *egc,
 
 	girq = &gc->irq;
 	if (bank->has_irq || bank->has_hierarchical_irq) {
-		struct irq_chip *ic;
-
 		gc->set_config = ep93xx_gpio_set_config;
 		egc->eic = devm_kcalloc(dev, 1,
 					sizeof(*egc->eic),
@@ -359,12 +370,7 @@ static int ep93xx_gpio_add_bank(struct ep93xx_gpio_chip *egc,
 		if (!egc->eic)
 			return -ENOMEM;
 		egc->eic->irq_offset = bank->irq;
-		ic = &egc->eic->ic;
+		gpio_irq_chip_set_chip(girq, &gpio_eic_irq_chip);
-		ic->name = devm_kasprintf(dev, GFP_KERNEL, "gpio-irq-%s", bank->label);
-		if (!ic->name)
-			return -ENOMEM;
-		ep93xx_init_irq_chip(dev, ic);
-		girq->chip = ic;
 	}
 
 	if (bank->has_irq) {

drivers/gpio/gpio-mxc.c

@@ -249,10 +249,11 @@ static void mxc_flip_edge(struct mxc_gpio_port *port, u32 gpio)
 	} else {
 		pr_err("mxc: invalid configuration for GPIO %d: %x\n",
 		       gpio, edge);
-		return;
+		goto unlock;
 	}
 	writel(val | (edge << (bit << 1)), reg);
 
+unlock:
 	raw_spin_unlock_irqrestore(&port->gc.bgpio_lock, flags);
 }
 

drivers/gpio/gpiolib-acpi.c

@@ -1104,7 +1104,8 @@ int acpi_dev_gpio_irq_wake_get_by(struct acpi_device *adev, const char *name, in
 				dev_dbg(&adev->dev, "IRQ %d already in use\n", irq);
 			}
 
-			if (wake_capable)
+			/* avoid suspend issues with GPIOs when systems are using S3 */
+			if (wake_capable && acpi_gbl_FADT.flags & ACPI_FADT_LOW_POWER_S0)
 				*wake_capable = info.wake_capable;
 
 			return irq;

tools/gpio/gpio-event-mon.c

@@ -86,6 +86,7 @@ int monitor_device(const char *device_name,
 			gpiotools_test_bit(values.bits, i));
 	}
 
+	i = 0;
 	while (1) {
 		struct gpio_v2_line_event event;