gpio fixes for v5.5-rc2

- fix gpio-xtensa build failure
 - fix a regression in gpio-mockup
 - fix a gcc warning in gpio-aspeed
 - fix a section mismatch problem in xgs-iproc
 - fix a problem with emulated open-drain outputs in gpiolib core
 - switch to bitops in gpio-pca953x after converting the driver to
   using bitmap
 - add a missed file to MAINTAINERS entry
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Merge tag 'gpio-v5.5-rc2-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/brgl/linux into fixes

gpio fixes for v5.5-rc2

- fix gpio-xtensa build failure
- fix a regression in gpio-mockup
- fix a gcc warning in gpio-aspeed
- fix a section mismatch problem in xgs-iproc
- fix a problem with emulated open-drain outputs in gpiolib core
- switch to bitops in gpio-pca953x after converting the driver to
  using bitmap
- add a missed file to MAINTAINERS entry

MAINTAINERS

@@ -7031,6 +7031,7 @@ L:	linux-acpi@vger.kernel.org
 S:	Maintained
 F:	Documentation/firmware-guide/acpi/gpio-properties.rst
 F:	drivers/gpio/gpiolib-acpi.c
+F:	drivers/gpio/gpiolib-acpi.h
 
 GPIO IR Transmitter
 M:	Sean Young <sean@mess.org>

drivers/gpio/gpio-aspeed-sgpio.c

@@ -107,7 +107,7 @@ static void __iomem *bank_reg(struct aspeed_sgpio *gpio,
 		return gpio->base + bank->irq_regs + GPIO_IRQ_STATUS;
 	default:
 		/* acturally if code runs to here, it's an error case */
-		BUG_ON(1);
+		BUG();
 	}
 }
 

drivers/gpio/gpio-mockup.c

@@ -226,7 +226,7 @@ static int gpio_mockup_get_direction(struct gpio_chip *gc, unsigned int offset)
 	int direction;
 
 	mutex_lock(&chip->lock);
-	direction = !chip->lines[offset].dir;
+	direction = chip->lines[offset].dir;
 	mutex_unlock(&chip->lock);
 
 	return direction;
@@ -395,7 +395,7 @@ static int gpio_mockup_probe(struct platform_device *pdev)
 	struct gpio_chip *gc;
 	struct device *dev;
 	const char *name;
-	int rv, base;
+	int rv, base, i;
 	u16 ngpio;
 
 	dev = &pdev->dev;
@@ -447,6 +447,9 @@ static int gpio_mockup_probe(struct platform_device *pdev)
 	if (!chip->lines)
 		return -ENOMEM;
 
+	for (i = 0; i < gc->ngpio; i++)
+		chip->lines[i].dir = GPIO_LINE_DIRECTION_IN;
+
 	if (device_property_read_bool(dev, "named-gpio-lines")) {
 		rv = gpio_mockup_name_lines(dev, chip);
 		if (rv)

drivers/gpio/gpio-pca953x.c

@@ -568,16 +568,18 @@ static void pca953x_irq_mask(struct irq_data *d)
 {
 	struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
 	struct pca953x_chip *chip = gpiochip_get_data(gc);
+	irq_hw_number_t hwirq = irqd_to_hwirq(d);
 
-	chip->irq_mask[d->hwirq / BANK_SZ] &= ~BIT(d->hwirq % BANK_SZ);
+	clear_bit(hwirq, chip->irq_mask);
 }
 
 static void pca953x_irq_unmask(struct irq_data *d)
 {
 	struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
 	struct pca953x_chip *chip = gpiochip_get_data(gc);
+	irq_hw_number_t hwirq = irqd_to_hwirq(d);
 
-	chip->irq_mask[d->hwirq / BANK_SZ] |= BIT(d->hwirq % BANK_SZ);
+	set_bit(hwirq, chip->irq_mask);
 }
 
 static int pca953x_irq_set_wake(struct irq_data *d, unsigned int on)
@@ -635,8 +637,7 @@ static int pca953x_irq_set_type(struct irq_data *d, unsigned int type)
 {
 	struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
 	struct pca953x_chip *chip = gpiochip_get_data(gc);
-	int bank_nb = d->hwirq / BANK_SZ;
+	irq_hw_number_t hwirq = irqd_to_hwirq(d);
-	u8 mask = BIT(d->hwirq % BANK_SZ);
 
 	if (!(type & IRQ_TYPE_EDGE_BOTH)) {
 		dev_err(&chip->client->dev, "irq %d: unsupported type %d\n",
@@ -644,15 +645,8 @@ static int pca953x_irq_set_type(struct irq_data *d, unsigned int type)
 		return -EINVAL;
 	}
 
-	if (type & IRQ_TYPE_EDGE_FALLING)
+	assign_bit(hwirq, chip->irq_trig_fall, type & IRQ_TYPE_EDGE_FALLING);
-		chip->irq_trig_fall[bank_nb] |= mask;
+	assign_bit(hwirq, chip->irq_trig_raise, type & IRQ_TYPE_EDGE_RISING);
-	else
-		chip->irq_trig_fall[bank_nb] &= ~mask;
-
-	if (type & IRQ_TYPE_EDGE_RISING)
-		chip->irq_trig_raise[bank_nb] |= mask;
-	else
-		chip->irq_trig_raise[bank_nb] &= ~mask;
 
 	return 0;
 }
@@ -661,10 +655,10 @@ static void pca953x_irq_shutdown(struct irq_data *d)
 {
 	struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
 	struct pca953x_chip *chip = gpiochip_get_data(gc);
-	u8 mask = BIT(d->hwirq % BANK_SZ);
+	irq_hw_number_t hwirq = irqd_to_hwirq(d);
 
-	chip->irq_trig_raise[d->hwirq / BANK_SZ] &= ~mask;
+	clear_bit(hwirq, chip->irq_trig_raise);
-	chip->irq_trig_fall[d->hwirq / BANK_SZ] &= ~mask;
+	clear_bit(hwirq, chip->irq_trig_fall);
 }
 
 static bool pca953x_irq_pending(struct pca953x_chip *chip, unsigned long *pending)

drivers/gpio/gpio-xgs-iproc.c

@@ -280,7 +280,7 @@ static int iproc_gpio_probe(struct platform_device *pdev)
 	return 0;
 }
 
-static int __exit iproc_gpio_remove(struct platform_device *pdev)
+static int iproc_gpio_remove(struct platform_device *pdev)
 {
 	struct iproc_gpio_chip *chip;
 

drivers/gpio/gpio-xtensa.c

@@ -44,15 +44,14 @@ static inline unsigned long enable_cp(unsigned long *cpenable)
 	unsigned long flags;
 
 	local_irq_save(flags);
-	RSR_CPENABLE(*cpenable);
+	*cpenable = xtensa_get_sr(cpenable);
-	WSR_CPENABLE(*cpenable | BIT(XCHAL_CP_ID_XTIOP));
+	xtensa_set_sr(*cpenable | BIT(XCHAL_CP_ID_XTIOP), cpenable);
-
 	return flags;
 }
 
 static inline void disable_cp(unsigned long flags, unsigned long cpenable)
 {
-	WSR_CPENABLE(cpenable);
+	xtensa_set_sr(cpenable, cpenable);
 	local_irq_restore(flags);
 }
 

drivers/gpio/gpiolib.c

@@ -220,6 +220,14 @@ int gpiod_get_direction(struct gpio_desc *desc)
 	chip = gpiod_to_chip(desc);
 	offset = gpio_chip_hwgpio(desc);
 
+	/*
+	 * Open drain emulation using input mode may incorrectly report
+	 * input here, fix that up.
+	 */
+	if (test_bit(FLAG_OPEN_DRAIN, &desc->flags) &&
+	    test_bit(FLAG_IS_OUT, &desc->flags))
+		return 0;
+
 	if (!chip->get_direction)
 		return -ENOTSUPP;