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-rw-r--r--drivers/misc/mchp_pci1xxxx/Kconfig13
-rw-r--r--drivers/misc/mchp_pci1xxxx/Makefile1
-rw-r--r--drivers/misc/mchp_pci1xxxx/mchp_pci1xxxx_gp.c165
-rw-r--r--drivers/misc/mchp_pci1xxxx/mchp_pci1xxxx_gp.h28
-rw-r--r--drivers/misc/mchp_pci1xxxx/mchp_pci1xxxx_gpio.c427
5 files changed, 634 insertions, 0 deletions
diff --git a/drivers/misc/mchp_pci1xxxx/Kconfig b/drivers/misc/mchp_pci1xxxx/Kconfig
new file mode 100644
index 000000000..4abb47de7
--- /dev/null
+++ b/drivers/misc/mchp_pci1xxxx/Kconfig
@@ -0,0 +1,13 @@
+config GP_PCI1XXXX
+ tristate "Microchip PCI1XXXX PCIe to GPIO Expander + OTP/EEPROM manager"
+ depends on PCI
+ depends on GPIOLIB
+ select GPIOLIB_IRQCHIP
+ select AUXILIARY_BUS
+ help
+ PCI1XXXX is a PCIe GEN 3 switch with one of the endpoints having
+ multiple functions and one of the functions is a GPIO controller
+ which also has registers to interface with the OTP and EEPROM.
+ Select yes, no or module here to include or exclude the driver
+ for the GPIO function.
+
diff --git a/drivers/misc/mchp_pci1xxxx/Makefile b/drivers/misc/mchp_pci1xxxx/Makefile
new file mode 100644
index 000000000..fc4615cfe
--- /dev/null
+++ b/drivers/misc/mchp_pci1xxxx/Makefile
@@ -0,0 +1 @@
+obj-$(CONFIG_GP_PCI1XXXX) := mchp_pci1xxxx_gp.o mchp_pci1xxxx_gpio.o
diff --git a/drivers/misc/mchp_pci1xxxx/mchp_pci1xxxx_gp.c b/drivers/misc/mchp_pci1xxxx/mchp_pci1xxxx_gp.c
new file mode 100644
index 000000000..32af2b14f
--- /dev/null
+++ b/drivers/misc/mchp_pci1xxxx/mchp_pci1xxxx_gp.c
@@ -0,0 +1,165 @@
+// SPDX-License-Identifier: GPL-2.0
+// Copyright (C) 2022 Microchip Technology Inc.
+
+#include <linux/mfd/core.h>
+#include <linux/module.h>
+#include <linux/pci.h>
+#include <linux/spinlock.h>
+#include <linux/gpio/driver.h>
+#include <linux/interrupt.h>
+#include <linux/io.h>
+#include <linux/idr.h>
+#include "mchp_pci1xxxx_gp.h"
+
+struct aux_bus_device {
+ struct auxiliary_device_wrapper *aux_device_wrapper[2];
+};
+
+static DEFINE_IDA(gp_client_ida);
+static const char aux_dev_otp_e2p_name[15] = "gp_otp_e2p";
+static const char aux_dev_gpio_name[15] = "gp_gpio";
+
+static void gp_auxiliary_device_release(struct device *dev)
+{
+ struct auxiliary_device_wrapper *aux_device_wrapper =
+ (struct auxiliary_device_wrapper *)container_of(dev,
+ struct auxiliary_device_wrapper, aux_dev.dev);
+
+ ida_free(&gp_client_ida, aux_device_wrapper->aux_dev.id);
+ kfree(aux_device_wrapper);
+}
+
+static int gp_aux_bus_probe(struct pci_dev *pdev, const struct pci_device_id *id)
+{
+ struct aux_bus_device *aux_bus;
+ int retval;
+
+ retval = pcim_enable_device(pdev);
+ if (retval)
+ return retval;
+
+ aux_bus = devm_kzalloc(&pdev->dev, sizeof(*aux_bus), GFP_KERNEL);
+ if (!aux_bus)
+ return -ENOMEM;
+
+ aux_bus->aux_device_wrapper[0] = kzalloc(sizeof(*aux_bus->aux_device_wrapper[0]),
+ GFP_KERNEL);
+ if (!aux_bus->aux_device_wrapper[0])
+ return -ENOMEM;
+
+ retval = ida_alloc(&gp_client_ida, GFP_KERNEL);
+ if (retval < 0)
+ goto err_ida_alloc_0;
+
+ aux_bus->aux_device_wrapper[0]->aux_dev.name = aux_dev_otp_e2p_name;
+ aux_bus->aux_device_wrapper[0]->aux_dev.dev.parent = &pdev->dev;
+ aux_bus->aux_device_wrapper[0]->aux_dev.dev.release = gp_auxiliary_device_release;
+ aux_bus->aux_device_wrapper[0]->aux_dev.id = retval;
+
+ aux_bus->aux_device_wrapper[0]->gp_aux_data.region_start = pci_resource_start(pdev, 0);
+ aux_bus->aux_device_wrapper[0]->gp_aux_data.region_length = pci_resource_end(pdev, 0);
+
+ retval = auxiliary_device_init(&aux_bus->aux_device_wrapper[0]->aux_dev);
+ if (retval < 0)
+ goto err_aux_dev_init_0;
+
+ retval = auxiliary_device_add(&aux_bus->aux_device_wrapper[0]->aux_dev);
+ if (retval)
+ goto err_aux_dev_add_0;
+
+ aux_bus->aux_device_wrapper[1] = kzalloc(sizeof(*aux_bus->aux_device_wrapper[1]),
+ GFP_KERNEL);
+ if (!aux_bus->aux_device_wrapper[1])
+ return -ENOMEM;
+
+ retval = ida_alloc(&gp_client_ida, GFP_KERNEL);
+ if (retval < 0)
+ goto err_ida_alloc_1;
+
+ aux_bus->aux_device_wrapper[1]->aux_dev.name = aux_dev_gpio_name;
+ aux_bus->aux_device_wrapper[1]->aux_dev.dev.parent = &pdev->dev;
+ aux_bus->aux_device_wrapper[1]->aux_dev.dev.release = gp_auxiliary_device_release;
+ aux_bus->aux_device_wrapper[1]->aux_dev.id = retval;
+
+ aux_bus->aux_device_wrapper[1]->gp_aux_data.region_start = pci_resource_start(pdev, 0);
+ aux_bus->aux_device_wrapper[1]->gp_aux_data.region_length = pci_resource_end(pdev, 0);
+
+ retval = pci_alloc_irq_vectors(pdev, 1, 1, PCI_IRQ_ALL_TYPES);
+
+ if (retval < 0)
+ goto err_aux_dev_init_1;
+
+ retval = pci_irq_vector(pdev, 0);
+ if (retval < 0)
+ goto err_aux_dev_init_1;
+
+ pdev->irq = retval;
+ aux_bus->aux_device_wrapper[1]->gp_aux_data.irq_num = pdev->irq;
+
+ retval = auxiliary_device_init(&aux_bus->aux_device_wrapper[1]->aux_dev);
+ if (retval < 0)
+ goto err_aux_dev_init_1;
+
+ retval = auxiliary_device_add(&aux_bus->aux_device_wrapper[1]->aux_dev);
+ if (retval)
+ goto err_aux_dev_add_1;
+
+ pci_set_drvdata(pdev, aux_bus);
+ pci_set_master(pdev);
+
+ return 0;
+
+err_aux_dev_add_1:
+ auxiliary_device_uninit(&aux_bus->aux_device_wrapper[1]->aux_dev);
+
+err_aux_dev_init_1:
+ ida_free(&gp_client_ida, aux_bus->aux_device_wrapper[1]->aux_dev.id);
+
+err_ida_alloc_1:
+ kfree(aux_bus->aux_device_wrapper[1]);
+
+err_aux_dev_add_0:
+ auxiliary_device_uninit(&aux_bus->aux_device_wrapper[0]->aux_dev);
+
+err_aux_dev_init_0:
+ ida_free(&gp_client_ida, aux_bus->aux_device_wrapper[0]->aux_dev.id);
+
+err_ida_alloc_0:
+ kfree(aux_bus->aux_device_wrapper[0]);
+
+ return retval;
+}
+
+static void gp_aux_bus_remove(struct pci_dev *pdev)
+{
+ struct aux_bus_device *aux_bus = pci_get_drvdata(pdev);
+
+ auxiliary_device_delete(&aux_bus->aux_device_wrapper[0]->aux_dev);
+ auxiliary_device_uninit(&aux_bus->aux_device_wrapper[0]->aux_dev);
+ auxiliary_device_delete(&aux_bus->aux_device_wrapper[1]->aux_dev);
+ auxiliary_device_uninit(&aux_bus->aux_device_wrapper[1]->aux_dev);
+}
+
+static const struct pci_device_id pci1xxxx_tbl[] = {
+ { PCI_DEVICE(0x1055, 0xA005) },
+ { PCI_DEVICE(0x1055, 0xA015) },
+ { PCI_DEVICE(0x1055, 0xA025) },
+ { PCI_DEVICE(0x1055, 0xA035) },
+ { PCI_DEVICE(0x1055, 0xA045) },
+ { PCI_DEVICE(0x1055, 0xA055) },
+ {0,}
+};
+MODULE_DEVICE_TABLE(pci, pci1xxxx_tbl);
+
+static struct pci_driver pci1xxxx_gp_driver = {
+ .name = "PCI1xxxxGP",
+ .id_table = pci1xxxx_tbl,
+ .probe = gp_aux_bus_probe,
+ .remove = gp_aux_bus_remove,
+};
+
+module_pci_driver(pci1xxxx_gp_driver);
+
+MODULE_DESCRIPTION("Microchip Technology Inc. PCI1xxxx GP expander");
+MODULE_AUTHOR("Kumaravel Thiagarajan <kumaravel.thiagarajan@microchip.com>");
+MODULE_LICENSE("GPL");
diff --git a/drivers/misc/mchp_pci1xxxx/mchp_pci1xxxx_gp.h b/drivers/misc/mchp_pci1xxxx/mchp_pci1xxxx_gp.h
new file mode 100644
index 000000000..37eec73b2
--- /dev/null
+++ b/drivers/misc/mchp_pci1xxxx/mchp_pci1xxxx_gp.h
@@ -0,0 +1,28 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/* Copyright (C) 2022 Microchip Technology Inc. */
+
+#ifndef _GPIO_PCI1XXXX_H
+#define _GPIO_PCI1XXXX_H
+
+#include <linux/spinlock.h>
+#include <linux/mutex.h>
+#include <linux/kthread.h>
+#include <linux/types.h>
+#include <linux/auxiliary_bus.h>
+
+/* Perform operations like variable length write, read and write with read back for OTP / EEPROM
+ * Perform bit mode write in OTP
+ */
+
+struct gp_aux_data_type {
+ int irq_num;
+ resource_size_t region_start;
+ resource_size_t region_length;
+};
+
+struct auxiliary_device_wrapper {
+ struct auxiliary_device aux_dev;
+ struct gp_aux_data_type gp_aux_data;
+};
+
+#endif
diff --git a/drivers/misc/mchp_pci1xxxx/mchp_pci1xxxx_gpio.c b/drivers/misc/mchp_pci1xxxx/mchp_pci1xxxx_gpio.c
new file mode 100644
index 000000000..3389803cb
--- /dev/null
+++ b/drivers/misc/mchp_pci1xxxx/mchp_pci1xxxx_gpio.c
@@ -0,0 +1,427 @@
+// SPDX-License-Identifier: GPL-2.0
+// Copyright (C) 2022 Microchip Technology Inc.
+// pci1xxxx gpio driver
+
+#include <linux/module.h>
+#include <linux/spinlock.h>
+#include <linux/gpio/driver.h>
+#include <linux/bio.h>
+#include <linux/mutex.h>
+#include <linux/kthread.h>
+#include <linux/interrupt.h>
+
+#include "mchp_pci1xxxx_gp.h"
+
+#define PCI1XXXX_NR_PINS 93
+#define PERI_GEN_RESET 0
+#define OUT_EN_OFFSET(x) ((((x) / 32) * 4) + 0x400)
+#define INP_EN_OFFSET(x) ((((x) / 32) * 4) + 0x400 + 0x10)
+#define OUT_OFFSET(x) ((((x) / 32) * 4) + 0x400 + 0x20)
+#define INP_OFFSET(x) ((((x) / 32) * 4) + 0x400 + 0x30)
+#define PULLUP_OFFSET(x) ((((x) / 32) * 4) + 0x400 + 0x40)
+#define PULLDOWN_OFFSET(x) ((((x) / 32) * 4) + 0x400 + 0x50)
+#define OPENDRAIN_OFFSET(x) ((((x) / 32) * 4) + 0x400 + 0x60)
+#define WAKEMASK_OFFSET(x) ((((x) / 32) * 4) + 0x400 + 0x70)
+#define MODE_OFFSET(x) ((((x) / 32) * 4) + 0x400 + 0x80)
+#define INTR_LO_TO_HI_EDGE_CONFIG(x) ((((x) / 32) * 4) + 0x400 + 0x90)
+#define INTR_HI_TO_LO_EDGE_CONFIG(x) ((((x) / 32) * 4) + 0x400 + 0xA0)
+#define INTR_LEVEL_CONFIG_OFFSET(x) ((((x) / 32) * 4) + 0x400 + 0xB0)
+#define INTR_LEVEL_MASK_OFFSET(x) ((((x) / 32) * 4) + 0x400 + 0xC0)
+#define INTR_STAT_OFFSET(x) ((((x) / 32) * 4) + 0x400 + 0xD0)
+#define DEBOUNCE_OFFSET(x) ((((x) / 32) * 4) + 0x400 + 0xE0)
+#define PIO_GLOBAL_CONFIG_OFFSET (0x400 + 0xF0)
+#define PIO_PCI_CTRL_REG_OFFSET (0x400 + 0xF4)
+#define INTR_MASK_OFFSET(x) ((((x) / 32) * 4) + 0x400 + 0x100)
+#define INTR_STATUS_OFFSET(x) (((x) * 4) + 0x400 + 0xD0)
+
+struct pci1xxxx_gpio {
+ struct auxiliary_device *aux_dev;
+ void __iomem *reg_base;
+ struct gpio_chip gpio;
+ spinlock_t lock;
+ int irq_base;
+};
+
+static int pci1xxxx_gpio_get_direction(struct gpio_chip *gpio, unsigned int nr)
+{
+ struct pci1xxxx_gpio *priv = gpiochip_get_data(gpio);
+ u32 data;
+ int ret = -EINVAL;
+
+ data = readl(priv->reg_base + INP_EN_OFFSET(nr));
+ if (data & BIT(nr % 32)) {
+ ret = 1;
+ } else {
+ data = readl(priv->reg_base + OUT_EN_OFFSET(nr));
+ if (data & BIT(nr % 32))
+ ret = 0;
+ }
+
+ return ret;
+}
+
+static inline void pci1xxx_assign_bit(void __iomem *base_addr, unsigned int reg_offset,
+ unsigned int bitpos, bool set)
+{
+ u32 data;
+
+ data = readl(base_addr + reg_offset);
+ if (set)
+ data |= BIT(bitpos);
+ else
+ data &= ~BIT(bitpos);
+ writel(data, base_addr + reg_offset);
+}
+
+static int pci1xxxx_gpio_direction_input(struct gpio_chip *gpio, unsigned int nr)
+{
+ struct pci1xxxx_gpio *priv = gpiochip_get_data(gpio);
+ unsigned long flags;
+
+ spin_lock_irqsave(&priv->lock, flags);
+ pci1xxx_assign_bit(priv->reg_base, INP_EN_OFFSET(nr), (nr % 32), true);
+ pci1xxx_assign_bit(priv->reg_base, OUT_EN_OFFSET(nr), (nr % 32), false);
+ spin_unlock_irqrestore(&priv->lock, flags);
+
+ return 0;
+}
+
+static int pci1xxxx_gpio_get(struct gpio_chip *gpio, unsigned int nr)
+{
+ struct pci1xxxx_gpio *priv = gpiochip_get_data(gpio);
+
+ return (readl(priv->reg_base + INP_OFFSET(nr)) >> (nr % 32)) & 1;
+}
+
+static int pci1xxxx_gpio_direction_output(struct gpio_chip *gpio,
+ unsigned int nr, int val)
+{
+ struct pci1xxxx_gpio *priv = gpiochip_get_data(gpio);
+ unsigned long flags;
+ u32 data;
+
+ spin_lock_irqsave(&priv->lock, flags);
+ pci1xxx_assign_bit(priv->reg_base, INP_EN_OFFSET(nr), (nr % 32), false);
+ pci1xxx_assign_bit(priv->reg_base, OUT_EN_OFFSET(nr), (nr % 32), true);
+ data = readl(priv->reg_base + OUT_OFFSET(nr));
+ if (val)
+ data |= (1 << (nr % 32));
+ else
+ data &= ~(1 << (nr % 32));
+ writel(data, priv->reg_base + OUT_OFFSET(nr));
+ spin_unlock_irqrestore(&priv->lock, flags);
+
+ return 0;
+}
+
+static void pci1xxxx_gpio_set(struct gpio_chip *gpio,
+ unsigned int nr, int val)
+{
+ struct pci1xxxx_gpio *priv = gpiochip_get_data(gpio);
+ unsigned long flags;
+
+ spin_lock_irqsave(&priv->lock, flags);
+ pci1xxx_assign_bit(priv->reg_base, OUT_OFFSET(nr), (nr % 32), val);
+ spin_unlock_irqrestore(&priv->lock, flags);
+}
+
+static int pci1xxxx_gpio_set_config(struct gpio_chip *gpio, unsigned int offset,
+ unsigned long config)
+{
+ struct pci1xxxx_gpio *priv = gpiochip_get_data(gpio);
+ unsigned long flags;
+ int ret = 0;
+
+ spin_lock_irqsave(&priv->lock, flags);
+ switch (pinconf_to_config_param(config)) {
+ case PIN_CONFIG_BIAS_PULL_UP:
+ pci1xxx_assign_bit(priv->reg_base, PULLUP_OFFSET(offset), (offset % 32), true);
+ break;
+ case PIN_CONFIG_BIAS_PULL_DOWN:
+ pci1xxx_assign_bit(priv->reg_base, PULLDOWN_OFFSET(offset), (offset % 32), true);
+ break;
+ case PIN_CONFIG_BIAS_DISABLE:
+ pci1xxx_assign_bit(priv->reg_base, PULLUP_OFFSET(offset), (offset % 32), false);
+ pci1xxx_assign_bit(priv->reg_base, PULLDOWN_OFFSET(offset), (offset % 32), false);
+ break;
+ case PIN_CONFIG_DRIVE_OPEN_DRAIN:
+ pci1xxx_assign_bit(priv->reg_base, OPENDRAIN_OFFSET(offset), (offset % 32), true);
+ break;
+ default:
+ ret = -EOPNOTSUPP;
+ break;
+ }
+ spin_unlock_irqrestore(&priv->lock, flags);
+
+ return ret;
+}
+
+static void pci1xxxx_gpio_irq_ack(struct irq_data *data)
+{
+ struct gpio_chip *chip = irq_data_get_irq_chip_data(data);
+ struct pci1xxxx_gpio *priv = gpiochip_get_data(chip);
+ unsigned int gpio = irqd_to_hwirq(data);
+ unsigned long flags;
+
+ spin_lock_irqsave(&priv->lock, flags);
+ pci1xxx_assign_bit(priv->reg_base, INTR_STAT_OFFSET(gpio), (gpio % 32), true);
+ spin_unlock_irqrestore(&priv->lock, flags);
+}
+
+static void pci1xxxx_gpio_irq_set_mask(struct irq_data *data, bool set)
+{
+ struct gpio_chip *chip = irq_data_get_irq_chip_data(data);
+ struct pci1xxxx_gpio *priv = gpiochip_get_data(chip);
+ unsigned int gpio = irqd_to_hwirq(data);
+ unsigned long flags;
+
+ spin_lock_irqsave(&priv->lock, flags);
+ pci1xxx_assign_bit(priv->reg_base, INTR_MASK_OFFSET(gpio), (gpio % 32), set);
+ spin_unlock_irqrestore(&priv->lock, flags);
+}
+
+static void pci1xxxx_gpio_irq_mask(struct irq_data *data)
+{
+ pci1xxxx_gpio_irq_set_mask(data, true);
+}
+
+static void pci1xxxx_gpio_irq_unmask(struct irq_data *data)
+{
+ pci1xxxx_gpio_irq_set_mask(data, false);
+}
+
+static int pci1xxxx_gpio_set_type(struct irq_data *data, unsigned int trigger_type)
+{
+ struct gpio_chip *chip = irq_data_get_irq_chip_data(data);
+ struct pci1xxxx_gpio *priv = gpiochip_get_data(chip);
+ unsigned int gpio = irqd_to_hwirq(data);
+ unsigned int bitpos = gpio % 32;
+
+ if (trigger_type & IRQ_TYPE_EDGE_FALLING) {
+ pci1xxx_assign_bit(priv->reg_base, INTR_HI_TO_LO_EDGE_CONFIG(gpio),
+ bitpos, false);
+ pci1xxx_assign_bit(priv->reg_base, MODE_OFFSET(gpio),
+ bitpos, false);
+ irq_set_handler_locked(data, handle_edge_irq);
+ } else {
+ pci1xxx_assign_bit(priv->reg_base, INTR_HI_TO_LO_EDGE_CONFIG(gpio),
+ bitpos, true);
+ }
+
+ if (trigger_type & IRQ_TYPE_EDGE_RISING) {
+ pci1xxx_assign_bit(priv->reg_base, INTR_LO_TO_HI_EDGE_CONFIG(gpio),
+ bitpos, false);
+ pci1xxx_assign_bit(priv->reg_base, MODE_OFFSET(gpio), bitpos,
+ false);
+ irq_set_handler_locked(data, handle_edge_irq);
+ } else {
+ pci1xxx_assign_bit(priv->reg_base, INTR_LO_TO_HI_EDGE_CONFIG(gpio),
+ bitpos, true);
+ }
+
+ if (trigger_type & IRQ_TYPE_LEVEL_LOW) {
+ pci1xxx_assign_bit(priv->reg_base, INTR_LEVEL_CONFIG_OFFSET(gpio),
+ bitpos, true);
+ pci1xxx_assign_bit(priv->reg_base, INTR_LEVEL_MASK_OFFSET(gpio),
+ bitpos, false);
+ pci1xxx_assign_bit(priv->reg_base, MODE_OFFSET(gpio), bitpos,
+ true);
+ irq_set_handler_locked(data, handle_edge_irq);
+ }
+
+ if (trigger_type & IRQ_TYPE_LEVEL_HIGH) {
+ pci1xxx_assign_bit(priv->reg_base, INTR_LEVEL_CONFIG_OFFSET(gpio),
+ bitpos, false);
+ pci1xxx_assign_bit(priv->reg_base, INTR_LEVEL_MASK_OFFSET(gpio),
+ bitpos, false);
+ pci1xxx_assign_bit(priv->reg_base, MODE_OFFSET(gpio), bitpos,
+ true);
+ irq_set_handler_locked(data, handle_edge_irq);
+ }
+
+ if ((!(trigger_type & IRQ_TYPE_LEVEL_LOW)) && (!(trigger_type & IRQ_TYPE_LEVEL_HIGH)))
+ pci1xxx_assign_bit(priv->reg_base, INTR_LEVEL_MASK_OFFSET(gpio), bitpos, true);
+
+ return true;
+}
+
+static irqreturn_t pci1xxxx_gpio_irq_handler(int irq, void *dev_id)
+{
+ struct pci1xxxx_gpio *priv = dev_id;
+ struct gpio_chip *gc = &priv->gpio;
+ unsigned long int_status = 0;
+ unsigned long flags;
+ u8 pincount;
+ int bit;
+ u8 gpiobank;
+
+ spin_lock_irqsave(&priv->lock, flags);
+ pci1xxx_assign_bit(priv->reg_base, PIO_GLOBAL_CONFIG_OFFSET, 16, true);
+ spin_unlock_irqrestore(&priv->lock, flags);
+ for (gpiobank = 0; gpiobank < 3; gpiobank++) {
+ spin_lock_irqsave(&priv->lock, flags);
+ int_status = readl(priv->reg_base + INTR_STATUS_OFFSET(gpiobank));
+ spin_unlock_irqrestore(&priv->lock, flags);
+ if (gpiobank == 2)
+ pincount = 29;
+ else
+ pincount = 32;
+ for_each_set_bit(bit, &int_status, pincount) {
+ unsigned int irq;
+
+ spin_lock_irqsave(&priv->lock, flags);
+ writel(BIT(bit), priv->reg_base + INTR_STATUS_OFFSET(gpiobank));
+ spin_unlock_irqrestore(&priv->lock, flags);
+ irq = irq_find_mapping(gc->irq.domain, (bit + (gpiobank * 32)));
+ generic_handle_irq(irq);
+ }
+ }
+ spin_lock_irqsave(&priv->lock, flags);
+ pci1xxx_assign_bit(priv->reg_base, PIO_GLOBAL_CONFIG_OFFSET, 16, false);
+ spin_unlock_irqrestore(&priv->lock, flags);
+
+ return IRQ_HANDLED;
+}
+
+static struct irq_chip pci1xxxx_gpio_irqchip = {
+ .name = "pci1xxxx_gpio",
+ .irq_ack = pci1xxxx_gpio_irq_ack,
+ .irq_mask = pci1xxxx_gpio_irq_mask,
+ .irq_unmask = pci1xxxx_gpio_irq_unmask,
+ .irq_set_type = pci1xxxx_gpio_set_type,
+};
+
+static int pci1xxxx_gpio_suspend(struct device *dev)
+{
+ struct pci1xxxx_gpio *priv = dev_get_drvdata(dev);
+ unsigned long flags;
+
+ spin_lock_irqsave(&priv->lock, flags);
+ pci1xxx_assign_bit(priv->reg_base, PIO_GLOBAL_CONFIG_OFFSET,
+ 16, true);
+ pci1xxx_assign_bit(priv->reg_base, PIO_GLOBAL_CONFIG_OFFSET,
+ 17, false);
+ pci1xxx_assign_bit(priv->reg_base, PERI_GEN_RESET, 16, true);
+ spin_unlock_irqrestore(&priv->lock, flags);
+
+ return 0;
+}
+
+static int pci1xxxx_gpio_resume(struct device *dev)
+{
+ struct pci1xxxx_gpio *priv = dev_get_drvdata(dev);
+ unsigned long flags;
+
+ spin_lock_irqsave(&priv->lock, flags);
+ pci1xxx_assign_bit(priv->reg_base, PIO_GLOBAL_CONFIG_OFFSET,
+ 17, true);
+ pci1xxx_assign_bit(priv->reg_base, PIO_GLOBAL_CONFIG_OFFSET,
+ 16, false);
+ pci1xxx_assign_bit(priv->reg_base, PERI_GEN_RESET, 16, false);
+ spin_unlock_irqrestore(&priv->lock, flags);
+
+ return 0;
+}
+
+static int pci1xxxx_gpio_setup(struct pci1xxxx_gpio *priv, int irq)
+{
+ struct gpio_chip *gchip = &priv->gpio;
+ struct gpio_irq_chip *girq;
+ int retval;
+
+ gchip->label = dev_name(&priv->aux_dev->dev);
+ gchip->parent = &priv->aux_dev->dev;
+ gchip->owner = THIS_MODULE;
+ gchip->direction_input = pci1xxxx_gpio_direction_input;
+ gchip->direction_output = pci1xxxx_gpio_direction_output;
+ gchip->get_direction = pci1xxxx_gpio_get_direction;
+ gchip->get = pci1xxxx_gpio_get;
+ gchip->set = pci1xxxx_gpio_set;
+ gchip->set_config = pci1xxxx_gpio_set_config;
+ gchip->dbg_show = NULL;
+ gchip->base = -1;
+ gchip->ngpio = PCI1XXXX_NR_PINS;
+ gchip->can_sleep = false;
+
+ retval = devm_request_threaded_irq(&priv->aux_dev->dev, irq,
+ NULL, pci1xxxx_gpio_irq_handler,
+ IRQF_ONESHOT, "PCI1xxxxGPIO", priv);
+
+ if (retval)
+ return retval;
+
+ girq = &priv->gpio.irq;
+ girq->chip = &pci1xxxx_gpio_irqchip;
+ girq->parent_handler = NULL;
+ girq->num_parents = 0;
+ girq->parents = NULL;
+ girq->default_type = IRQ_TYPE_NONE;
+ girq->handler = handle_bad_irq;
+
+ return 0;
+}
+
+static int pci1xxxx_gpio_probe(struct auxiliary_device *aux_dev,
+ const struct auxiliary_device_id *id)
+
+{
+ struct auxiliary_device_wrapper *aux_dev_wrapper;
+ struct gp_aux_data_type *pdata;
+ struct pci1xxxx_gpio *priv;
+ int retval;
+
+ aux_dev_wrapper = (struct auxiliary_device_wrapper *)
+ container_of(aux_dev, struct auxiliary_device_wrapper, aux_dev);
+
+ pdata = &aux_dev_wrapper->gp_aux_data;
+
+ if (!pdata)
+ return -EINVAL;
+
+ priv = devm_kzalloc(&aux_dev->dev, sizeof(struct pci1xxxx_gpio), GFP_KERNEL);
+ if (!priv)
+ return -ENOMEM;
+
+ spin_lock_init(&priv->lock);
+ priv->aux_dev = aux_dev;
+
+ if (!devm_request_mem_region(&aux_dev->dev, pdata->region_start, 0x800, aux_dev->name))
+ return -EBUSY;
+
+ priv->reg_base = devm_ioremap(&aux_dev->dev, pdata->region_start, 0x800);
+ if (!priv->reg_base)
+ return -ENOMEM;
+
+ writel(0x0264, (priv->reg_base + 0x400 + 0xF0));
+
+ retval = pci1xxxx_gpio_setup(priv, pdata->irq_num);
+
+ if (retval < 0)
+ return retval;
+
+ dev_set_drvdata(&aux_dev->dev, priv);
+
+ return devm_gpiochip_add_data(&aux_dev->dev, &priv->gpio, priv);
+}
+
+static DEFINE_SIMPLE_DEV_PM_OPS(pci1xxxx_gpio_pm_ops, pci1xxxx_gpio_suspend, pci1xxxx_gpio_resume);
+
+static const struct auxiliary_device_id pci1xxxx_gpio_auxiliary_id_table[] = {
+ {.name = "mchp_pci1xxxx_gp.gp_gpio"},
+ {}
+};
+MODULE_DEVICE_TABLE(auxiliary, pci1xxxx_gpio_auxiliary_id_table);
+
+static struct auxiliary_driver pci1xxxx_gpio_driver = {
+ .driver = {
+ .name = "PCI1xxxxGPIO",
+ .pm = &pci1xxxx_gpio_pm_ops,
+ },
+ .probe = pci1xxxx_gpio_probe,
+ .id_table = pci1xxxx_gpio_auxiliary_id_table
+};
+module_auxiliary_driver(pci1xxxx_gpio_driver);
+
+MODULE_DESCRIPTION("Microchip Technology Inc. PCI1xxxx GPIO controller");
+MODULE_AUTHOR("Kumaravel Thiagarajan <kumaravel.thiagarajan@microchip.com>");
+MODULE_LICENSE("GPL");