Merge tag 'gpio-fixes-for-v6.13-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/brgl/linux

Pull gpio fixes from Bartosz Golaszewski:

 - fix several low-level issues in gpio-graniterapids

 - fix an initialization order issue that manifests itself with
   __counted_by() checks in gpio-ljca

 - don't default to y for CONFIG_GPIO_MVEBU with COMPILE_TEST enabled

 - move the DEFAULT_SYMBOL_NAMESPACE define before the export.h include
   in gpio-idio-16

* tag 'gpio-fixes-for-v6.13-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/brgl/linux:
  gpio: idio-16: Actually make use of the GPIO_IDIO_16 symbol namespace
  gpio: graniterapids: Fix GPIO Ack functionality
  gpio: graniterapids: Check if GPIO line can be used for IRQs
  gpio: graniterapids: Determine if GPIO pad can be used by driver
  gpio: graniterapids: Fix invalid RXEVCFG register bitmask
  gpio: graniterapids: Fix invalid GPI_IS register offset
  gpio: graniterapids: Fix incorrect BAR assignment
  gpio: graniterapids: Fix vGPIO driver crash
  gpio: ljca: Initialize num before accessing item in ljca_gpio_config
  gpio: GPIO_MVEBU should not default to y when compile-testing

Author: torvalds

drivers/gpio/Kconfig

@@ -482,8 +482,9 @@ config GPIO_MT7621
 	  Say yes here to support the Mediatek MT7621 SoC GPIO device.
 
 config GPIO_MVEBU
-	def_bool y
+	bool "Marvell Orion and EBU GPIO support" if COMPILE_TEST
 	depends on PLAT_ORION || ARCH_MVEBU || COMPILE_TEST
+	default PLAT_ORION || ARCH_MVEBU
 	select GENERIC_IRQ_CHIP
 	select REGMAP_MMIO
 

drivers/gpio/gpio-graniterapids.c

@@ -32,12 +32,14 @@
 #define GNR_PINS_PER_REG 32
 #define GNR_NUM_REGS DIV_ROUND_UP(GNR_NUM_PINS, GNR_PINS_PER_REG)
 
-#define GNR_CFG_BAR		0x00
+#define GNR_CFG_PADBAR		0x00
 #define GNR_CFG_LOCK_OFFSET	0x04
-#define GNR_GPI_STATUS_OFFSET	0x20
+#define GNR_GPI_STATUS_OFFSET	0x14
 #define GNR_GPI_ENABLE_OFFSET	0x24
 
-#define GNR_CFG_DW_RX_MASK	GENMASK(25, 22)
+#define GNR_CFG_DW_HOSTSW_MODE	BIT(27)
+#define GNR_CFG_DW_RX_MASK	GENMASK(23, 22)
+#define GNR_CFG_DW_INTSEL_MASK	GENMASK(21, 14)
 #define GNR_CFG_DW_RX_DISABLE	FIELD_PREP(GNR_CFG_DW_RX_MASK, 2)
 #define GNR_CFG_DW_RX_EDGE	FIELD_PREP(GNR_CFG_DW_RX_MASK, 1)
 #define GNR_CFG_DW_RX_LEVEL	FIELD_PREP(GNR_CFG_DW_RX_MASK, 0)
@@ -50,13 +52,15 @@
  * struct gnr_gpio - Intel Granite Rapids-D vGPIO driver state
  * @gc: GPIO controller interface
  * @reg_base: base address of the GPIO registers
+ * @pad_base: base address of the vGPIO pad configuration registers
  * @ro_bitmap: bitmap of read-only pins
  * @lock: guard the registers
  * @pad_backup: backup of the register state for suspend
  */
 struct gnr_gpio {
 	struct gpio_chip gc;
 	void __iomem *reg_base;
+	void __iomem *pad_base;
 	DECLARE_BITMAP(ro_bitmap, GNR_NUM_PINS);
 	raw_spinlock_t lock;
 	u32 pad_backup[];
@@ -65,7 +69,7 @@ struct gnr_gpio {
 static void __iomem *gnr_gpio_get_padcfg_addr(const struct gnr_gpio *priv,
 					      unsigned int gpio)
 {
-	return priv->reg_base + gpio * sizeof(u32);
+	return priv->pad_base + gpio * sizeof(u32);
 }
 
 static int gnr_gpio_configure_line(struct gpio_chip *gc, unsigned int gpio,
@@ -88,6 +92,20 @@ static int gnr_gpio_configure_line(struct gpio_chip *gc, unsigned int gpio,
 	return 0;
 }
 
+static int gnr_gpio_request(struct gpio_chip *gc, unsigned int gpio)
+{
+	struct gnr_gpio *priv = gpiochip_get_data(gc);
+	u32 dw;
+
+	dw = readl(gnr_gpio_get_padcfg_addr(priv, gpio));
+	if (!(dw & GNR_CFG_DW_HOSTSW_MODE)) {
+		dev_warn(gc->parent, "GPIO %u is not owned by host", gpio);
+		return -EBUSY;
+	}
+
+	return 0;
+}
+
 static int gnr_gpio_get(struct gpio_chip *gc, unsigned int gpio)
 {
 	const struct gnr_gpio *priv = gpiochip_get_data(gc);
@@ -139,6 +157,7 @@ static int gnr_gpio_direction_output(struct gpio_chip *gc, unsigned int gpio, in
 
 static const struct gpio_chip gnr_gpio_chip = {
 	.owner		  = THIS_MODULE,
+	.request	  = gnr_gpio_request,
 	.get		  = gnr_gpio_get,
 	.set		  = gnr_gpio_set,
 	.get_direction    = gnr_gpio_get_direction,
@@ -166,7 +185,7 @@ static void gnr_gpio_irq_ack(struct irq_data *d)
 	guard(raw_spinlock_irqsave)(&priv->lock);
 
 	reg = readl(addr);
-	reg &= ~BIT(bit_idx);
+	reg |= BIT(bit_idx);
 	writel(reg, addr);
 }
 
@@ -209,10 +228,18 @@ static void gnr_gpio_irq_unmask(struct irq_data *d)
 static int gnr_gpio_irq_set_type(struct irq_data *d, unsigned int type)
 {
 	struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
-	irq_hw_number_t pin = irqd_to_hwirq(d);
-	u32 mask = GNR_CFG_DW_RX_MASK;
+	struct gnr_gpio *priv = gpiochip_get_data(gc);
+	irq_hw_number_t hwirq = irqd_to_hwirq(d);
+	u32 reg;
 	u32 set;
 
+	/* Allow interrupts only if Interrupt Select field is non-zero */
+	reg = readl(gnr_gpio_get_padcfg_addr(priv, hwirq));
+	if (!(reg & GNR_CFG_DW_INTSEL_MASK)) {
+		dev_dbg(gc->parent, "GPIO %lu cannot be used as IRQ", hwirq);
+		return -EPERM;
+	}
+
 	/* Falling edge and level low triggers not supported by the GPIO controller */
 	switch (type) {
 	case IRQ_TYPE_NONE:
@@ -230,10 +257,11 @@ static int gnr_gpio_irq_set_type(struct irq_data *d, unsigned int type)
 		return -EINVAL;
 	}
 
-	return gnr_gpio_configure_line(gc, pin, mask, set);
+	return gnr_gpio_configure_line(gc, hwirq, GNR_CFG_DW_RX_MASK, set);
 }
 
 static const struct irq_chip gnr_gpio_irq_chip = {
+	.name		= "gpio-graniterapids",
 	.irq_ack	= gnr_gpio_irq_ack,
 	.irq_mask	= gnr_gpio_irq_mask,
 	.irq_unmask	= gnr_gpio_irq_unmask,
@@ -291,6 +319,7 @@ static int gnr_gpio_probe(struct platform_device *pdev)
 	struct gnr_gpio *priv;
 	void __iomem *regs;
 	int irq, ret;
+	u32 offset;
 
 	priv = devm_kzalloc(dev, struct_size(priv, pad_backup, num_backup_pins), GFP_KERNEL);
 	if (!priv)
@@ -302,6 +331,10 @@ static int gnr_gpio_probe(struct platform_device *pdev)
 	if (IS_ERR(regs))
 		return PTR_ERR(regs);
 
+	priv->reg_base = regs;
+	offset = readl(priv->reg_base + GNR_CFG_PADBAR);
+	priv->pad_base = priv->reg_base + offset;
+
 	irq = platform_get_irq(pdev, 0);
 	if (irq < 0)
 		return irq;
@@ -311,8 +344,6 @@ static int gnr_gpio_probe(struct platform_device *pdev)
 	if (ret)
 		return dev_err_probe(dev, ret, "failed to request interrupt\n");
 
-	priv->reg_base = regs + readl(regs + GNR_CFG_BAR);
-
 	gnr_gpio_init_pin_ro_bits(dev, priv->reg_base + GNR_CFG_LOCK_OFFSET,
 				  priv->ro_bitmap);
 
@@ -324,7 +355,6 @@ static int gnr_gpio_probe(struct platform_device *pdev)
 
 	girq = &priv->gc.irq;
 	gpio_irq_chip_set_chip(girq, &gnr_gpio_irq_chip);
-	girq->chip->name	= dev_name(dev);
 	girq->parent_handler	= NULL;
 	girq->num_parents	= 0;
 	girq->parents		= NULL;

drivers/gpio/gpio-idio-16.c

@@ -3,6 +3,9 @@
  * GPIO library for the ACCES IDIO-16 family
  * Copyright (C) 2022 William Breathitt Gray
  */
+
+#define DEFAULT_SYMBOL_NAMESPACE "GPIO_IDIO_16"
+
 #include <linux/bits.h>
 #include <linux/device.h>
 #include <linux/err.h>
@@ -14,8 +17,6 @@
 
 #include "gpio-idio-16.h"
 
-#define DEFAULT_SYMBOL_NAMESPACE "GPIO_IDIO_16"
-
 #define IDIO_16_DAT_BASE 0x0
 #define IDIO_16_OUT_BASE IDIO_16_DAT_BASE
 #define IDIO_16_IN_BASE (IDIO_16_DAT_BASE + 1)

drivers/gpio/gpio-ljca.c

@@ -82,9 +82,9 @@ static int ljca_gpio_config(struct ljca_gpio_dev *ljca_gpio, u8 gpio_id,
 	int ret;
 
 	mutex_lock(&ljca_gpio->trans_lock);
+	packet->num = 1;
 	packet->item[0].index = gpio_id;
 	packet->item[0].value = config | ljca_gpio->connect_mode[gpio_id];
-	packet->num = 1;
 
 	ret = ljca_transfer(ljca_gpio->ljca, LJCA_GPIO_CONFIG, (u8 *)packet,
 			    struct_size(packet, item, packet->num), NULL, 0);