L: platform-driver-x86@vger.kernel.org
S: Maintained
F: arch/x86/include/asm/intel_punit_ipc.h
-F: drivers/platform/x86/intel_punit_ipc.c
+F: drivers/platform/x86/intel/punit_ipc.c
INTEL PMC CORE DRIVER
M: Rajneesh Bhardwaj <irenic.rajneesh@gmail.com>
- Low Power Mode registers (Tigerlake and beyond)
- PMC quirks as needed to enable SLPS0/S0ix
-config INTEL_PUNIT_IPC
- tristate "Intel P-Unit IPC Driver"
- help
- This driver provides support for Intel P-Unit Mailbox IPC mechanism,
- which is used to bridge the communications between kernel and P-Unit.
-
config INTEL_SCU_IPC
bool
# Intel PMIC / PMC / P-Unit devices
obj-$(CONFIG_INTEL_PMC_CORE) += intel_pmc_core.o intel_pmc_core_pltdrv.o
-obj-$(CONFIG_INTEL_PUNIT_IPC) += intel_punit_ipc.o
obj-$(CONFIG_INTEL_SCU_IPC) += intel_scu_ipc.o
obj-$(CONFIG_INTEL_SCU_PCI) += intel_scu_pcidrv.o
obj-$(CONFIG_INTEL_SCU_PLATFORM) += intel_scu_pltdrv.o
To compile this driver as a module, choose M here: the module
will be called intel_mrfld_pwrbtn.
+config INTEL_PUNIT_IPC
+ tristate "Intel P-Unit IPC Driver"
+ help
+ This driver provides support for Intel P-Unit Mailbox IPC mechanism,
+ which is used to bridge the communications between kernel and P-Unit.
+
endif # X86_PLATFORM_DRIVERS_INTEL
obj-$(CONFIG_INTEL_CHTDC_TI_PWRBTN) += intel_chtdc_ti_pwrbtn.o
intel_mrfld_pwrbtn-y := mrfld_pwrbtn.o
obj-$(CONFIG_INTEL_MRFLD_PWRBTN) += intel_mrfld_pwrbtn.o
+intel_punit_ipc-y := punit_ipc.o
+obj-$(CONFIG_INTEL_PUNIT_IPC) += intel_punit_ipc.o
--- /dev/null
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Driver for the Intel P-Unit Mailbox IPC mechanism
+ *
+ * (C) Copyright 2015 Intel Corporation
+ *
+ * The heart of the P-Unit is the Foxton microcontroller and its firmware,
+ * which provide mailbox interface for power management usage.
+ */
+
+#include <linux/acpi.h>
+#include <linux/bitops.h>
+#include <linux/delay.h>
+#include <linux/device.h>
+#include <linux/interrupt.h>
+#include <linux/io.h>
+#include <linux/mod_devicetable.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+
+#include <asm/intel_punit_ipc.h>
+
+/* IPC Mailbox registers */
+#define OFFSET_DATA_LOW 0x0
+#define OFFSET_DATA_HIGH 0x4
+/* bit field of interface register */
+#define CMD_RUN BIT(31)
+#define CMD_ERRCODE_MASK GENMASK(7, 0)
+#define CMD_PARA1_SHIFT 8
+#define CMD_PARA2_SHIFT 16
+
+#define CMD_TIMEOUT_SECONDS 1
+
+enum {
+ BASE_DATA = 0,
+ BASE_IFACE,
+ BASE_MAX,
+};
+
+typedef struct {
+ struct device *dev;
+ struct mutex lock;
+ int irq;
+ struct completion cmd_complete;
+ /* base of interface and data registers */
+ void __iomem *base[RESERVED_IPC][BASE_MAX];
+ IPC_TYPE type;
+} IPC_DEV;
+
+static IPC_DEV *punit_ipcdev;
+
+static inline u32 ipc_read_status(IPC_DEV *ipcdev, IPC_TYPE type)
+{
+ return readl(ipcdev->base[type][BASE_IFACE]);
+}
+
+static inline void ipc_write_cmd(IPC_DEV *ipcdev, IPC_TYPE type, u32 cmd)
+{
+ writel(cmd, ipcdev->base[type][BASE_IFACE]);
+}
+
+static inline u32 ipc_read_data_low(IPC_DEV *ipcdev, IPC_TYPE type)
+{
+ return readl(ipcdev->base[type][BASE_DATA] + OFFSET_DATA_LOW);
+}
+
+static inline u32 ipc_read_data_high(IPC_DEV *ipcdev, IPC_TYPE type)
+{
+ return readl(ipcdev->base[type][BASE_DATA] + OFFSET_DATA_HIGH);
+}
+
+static inline void ipc_write_data_low(IPC_DEV *ipcdev, IPC_TYPE type, u32 data)
+{
+ writel(data, ipcdev->base[type][BASE_DATA] + OFFSET_DATA_LOW);
+}
+
+static inline void ipc_write_data_high(IPC_DEV *ipcdev, IPC_TYPE type, u32 data)
+{
+ writel(data, ipcdev->base[type][BASE_DATA] + OFFSET_DATA_HIGH);
+}
+
+static const char *ipc_err_string(int error)
+{
+ if (error == IPC_PUNIT_ERR_SUCCESS)
+ return "no error";
+ else if (error == IPC_PUNIT_ERR_INVALID_CMD)
+ return "invalid command";
+ else if (error == IPC_PUNIT_ERR_INVALID_PARAMETER)
+ return "invalid parameter";
+ else if (error == IPC_PUNIT_ERR_CMD_TIMEOUT)
+ return "command timeout";
+ else if (error == IPC_PUNIT_ERR_CMD_LOCKED)
+ return "command locked";
+ else if (error == IPC_PUNIT_ERR_INVALID_VR_ID)
+ return "invalid vr id";
+ else if (error == IPC_PUNIT_ERR_VR_ERR)
+ return "vr error";
+ else
+ return "unknown error";
+}
+
+static int intel_punit_ipc_check_status(IPC_DEV *ipcdev, IPC_TYPE type)
+{
+ int loops = CMD_TIMEOUT_SECONDS * USEC_PER_SEC;
+ int errcode;
+ int status;
+
+ if (ipcdev->irq) {
+ if (!wait_for_completion_timeout(&ipcdev->cmd_complete,
+ CMD_TIMEOUT_SECONDS * HZ)) {
+ dev_err(ipcdev->dev, "IPC timed out\n");
+ return -ETIMEDOUT;
+ }
+ } else {
+ while ((ipc_read_status(ipcdev, type) & CMD_RUN) && --loops)
+ udelay(1);
+ if (!loops) {
+ dev_err(ipcdev->dev, "IPC timed out\n");
+ return -ETIMEDOUT;
+ }
+ }
+
+ status = ipc_read_status(ipcdev, type);
+ errcode = status & CMD_ERRCODE_MASK;
+ if (errcode) {
+ dev_err(ipcdev->dev, "IPC failed: %s, IPC_STS=0x%x\n",
+ ipc_err_string(errcode), status);
+ return -EIO;
+ }
+
+ return 0;
+}
+
+/**
+ * intel_punit_ipc_simple_command() - Simple IPC command
+ * @cmd: IPC command code.
+ * @para1: First 8bit parameter, set 0 if not used.
+ * @para2: Second 8bit parameter, set 0 if not used.
+ *
+ * Send a IPC command to P-Unit when there is no data transaction
+ *
+ * Return: IPC error code or 0 on success.
+ */
+int intel_punit_ipc_simple_command(int cmd, int para1, int para2)
+{
+ IPC_DEV *ipcdev = punit_ipcdev;
+ IPC_TYPE type;
+ u32 val;
+ int ret;
+
+ mutex_lock(&ipcdev->lock);
+
+ reinit_completion(&ipcdev->cmd_complete);
+ type = (cmd & IPC_PUNIT_CMD_TYPE_MASK) >> IPC_TYPE_OFFSET;
+
+ val = cmd & ~IPC_PUNIT_CMD_TYPE_MASK;
+ val |= CMD_RUN | para2 << CMD_PARA2_SHIFT | para1 << CMD_PARA1_SHIFT;
+ ipc_write_cmd(ipcdev, type, val);
+ ret = intel_punit_ipc_check_status(ipcdev, type);
+
+ mutex_unlock(&ipcdev->lock);
+
+ return ret;
+}
+EXPORT_SYMBOL(intel_punit_ipc_simple_command);
+
+/**
+ * intel_punit_ipc_command() - IPC command with data and pointers
+ * @cmd: IPC command code.
+ * @para1: First 8bit parameter, set 0 if not used.
+ * @para2: Second 8bit parameter, set 0 if not used.
+ * @in: Input data, 32bit for BIOS cmd, two 32bit for GTD and ISPD.
+ * @out: Output data.
+ *
+ * Send a IPC command to P-Unit with data transaction
+ *
+ * Return: IPC error code or 0 on success.
+ */
+int intel_punit_ipc_command(u32 cmd, u32 para1, u32 para2, u32 *in, u32 *out)
+{
+ IPC_DEV *ipcdev = punit_ipcdev;
+ IPC_TYPE type;
+ u32 val;
+ int ret;
+
+ mutex_lock(&ipcdev->lock);
+
+ reinit_completion(&ipcdev->cmd_complete);
+ type = (cmd & IPC_PUNIT_CMD_TYPE_MASK) >> IPC_TYPE_OFFSET;
+
+ if (in) {
+ ipc_write_data_low(ipcdev, type, *in);
+ if (type == GTDRIVER_IPC || type == ISPDRIVER_IPC)
+ ipc_write_data_high(ipcdev, type, *++in);
+ }
+
+ val = cmd & ~IPC_PUNIT_CMD_TYPE_MASK;
+ val |= CMD_RUN | para2 << CMD_PARA2_SHIFT | para1 << CMD_PARA1_SHIFT;
+ ipc_write_cmd(ipcdev, type, val);
+
+ ret = intel_punit_ipc_check_status(ipcdev, type);
+ if (ret)
+ goto out;
+
+ if (out) {
+ *out = ipc_read_data_low(ipcdev, type);
+ if (type == GTDRIVER_IPC || type == ISPDRIVER_IPC)
+ *++out = ipc_read_data_high(ipcdev, type);
+ }
+
+out:
+ mutex_unlock(&ipcdev->lock);
+ return ret;
+}
+EXPORT_SYMBOL_GPL(intel_punit_ipc_command);
+
+static irqreturn_t intel_punit_ioc(int irq, void *dev_id)
+{
+ IPC_DEV *ipcdev = dev_id;
+
+ complete(&ipcdev->cmd_complete);
+ return IRQ_HANDLED;
+}
+
+static int intel_punit_get_bars(struct platform_device *pdev)
+{
+ void __iomem *addr;
+
+ /*
+ * The following resources are required
+ * - BIOS_IPC BASE_DATA
+ * - BIOS_IPC BASE_IFACE
+ */
+ addr = devm_platform_ioremap_resource(pdev, 0);
+ if (IS_ERR(addr))
+ return PTR_ERR(addr);
+ punit_ipcdev->base[BIOS_IPC][BASE_DATA] = addr;
+
+ addr = devm_platform_ioremap_resource(pdev, 1);
+ if (IS_ERR(addr))
+ return PTR_ERR(addr);
+ punit_ipcdev->base[BIOS_IPC][BASE_IFACE] = addr;
+
+ /*
+ * The following resources are optional
+ * - ISPDRIVER_IPC BASE_DATA
+ * - ISPDRIVER_IPC BASE_IFACE
+ * - GTDRIVER_IPC BASE_DATA
+ * - GTDRIVER_IPC BASE_IFACE
+ */
+ addr = devm_platform_ioremap_resource(pdev, 2);
+ if (!IS_ERR(addr))
+ punit_ipcdev->base[ISPDRIVER_IPC][BASE_DATA] = addr;
+
+ addr = devm_platform_ioremap_resource(pdev, 3);
+ if (!IS_ERR(addr))
+ punit_ipcdev->base[ISPDRIVER_IPC][BASE_IFACE] = addr;
+
+ addr = devm_platform_ioremap_resource(pdev, 4);
+ if (!IS_ERR(addr))
+ punit_ipcdev->base[GTDRIVER_IPC][BASE_DATA] = addr;
+
+ addr = devm_platform_ioremap_resource(pdev, 5);
+ if (!IS_ERR(addr))
+ punit_ipcdev->base[GTDRIVER_IPC][BASE_IFACE] = addr;
+
+ return 0;
+}
+
+static int intel_punit_ipc_probe(struct platform_device *pdev)
+{
+ int irq, ret;
+
+ punit_ipcdev = devm_kzalloc(&pdev->dev,
+ sizeof(*punit_ipcdev), GFP_KERNEL);
+ if (!punit_ipcdev)
+ return -ENOMEM;
+
+ platform_set_drvdata(pdev, punit_ipcdev);
+
+ irq = platform_get_irq_optional(pdev, 0);
+ if (irq < 0) {
+ dev_warn(&pdev->dev, "Invalid IRQ, using polling mode\n");
+ } else {
+ ret = devm_request_irq(&pdev->dev, irq, intel_punit_ioc,
+ IRQF_NO_SUSPEND, "intel_punit_ipc",
+ &punit_ipcdev);
+ if (ret) {
+ dev_err(&pdev->dev, "Failed to request irq: %d\n", irq);
+ return ret;
+ }
+ punit_ipcdev->irq = irq;
+ }
+
+ ret = intel_punit_get_bars(pdev);
+ if (ret)
+ return ret;
+
+ punit_ipcdev->dev = &pdev->dev;
+ mutex_init(&punit_ipcdev->lock);
+ init_completion(&punit_ipcdev->cmd_complete);
+
+ return 0;
+}
+
+static int intel_punit_ipc_remove(struct platform_device *pdev)
+{
+ return 0;
+}
+
+static const struct acpi_device_id punit_ipc_acpi_ids[] = {
+ { "INT34D4", 0 },
+ { }
+};
+MODULE_DEVICE_TABLE(acpi, punit_ipc_acpi_ids);
+
+static struct platform_driver intel_punit_ipc_driver = {
+ .probe = intel_punit_ipc_probe,
+ .remove = intel_punit_ipc_remove,
+ .driver = {
+ .name = "intel_punit_ipc",
+ .acpi_match_table = ACPI_PTR(punit_ipc_acpi_ids),
+ },
+};
+
+static int __init intel_punit_ipc_init(void)
+{
+ return platform_driver_register(&intel_punit_ipc_driver);
+}
+
+static void __exit intel_punit_ipc_exit(void)
+{
+ platform_driver_unregister(&intel_punit_ipc_driver);
+}
+
+MODULE_AUTHOR("Zha Qipeng <qipeng.zha@intel.com>");
+MODULE_DESCRIPTION("Intel P-Unit IPC driver");
+MODULE_LICENSE("GPL v2");
+
+/* Some modules are dependent on this, so init earlier */
+fs_initcall(intel_punit_ipc_init);
+module_exit(intel_punit_ipc_exit);
+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0
-/*
- * Driver for the Intel P-Unit Mailbox IPC mechanism
- *
- * (C) Copyright 2015 Intel Corporation
- *
- * The heart of the P-Unit is the Foxton microcontroller and its firmware,
- * which provide mailbox interface for power management usage.
- */
-
-#include <linux/acpi.h>
-#include <linux/bitops.h>
-#include <linux/delay.h>
-#include <linux/device.h>
-#include <linux/interrupt.h>
-#include <linux/io.h>
-#include <linux/mod_devicetable.h>
-#include <linux/module.h>
-#include <linux/platform_device.h>
-
-#include <asm/intel_punit_ipc.h>
-
-/* IPC Mailbox registers */
-#define OFFSET_DATA_LOW 0x0
-#define OFFSET_DATA_HIGH 0x4
-/* bit field of interface register */
-#define CMD_RUN BIT(31)
-#define CMD_ERRCODE_MASK GENMASK(7, 0)
-#define CMD_PARA1_SHIFT 8
-#define CMD_PARA2_SHIFT 16
-
-#define CMD_TIMEOUT_SECONDS 1
-
-enum {
- BASE_DATA = 0,
- BASE_IFACE,
- BASE_MAX,
-};
-
-typedef struct {
- struct device *dev;
- struct mutex lock;
- int irq;
- struct completion cmd_complete;
- /* base of interface and data registers */
- void __iomem *base[RESERVED_IPC][BASE_MAX];
- IPC_TYPE type;
-} IPC_DEV;
-
-static IPC_DEV *punit_ipcdev;
-
-static inline u32 ipc_read_status(IPC_DEV *ipcdev, IPC_TYPE type)
-{
- return readl(ipcdev->base[type][BASE_IFACE]);
-}
-
-static inline void ipc_write_cmd(IPC_DEV *ipcdev, IPC_TYPE type, u32 cmd)
-{
- writel(cmd, ipcdev->base[type][BASE_IFACE]);
-}
-
-static inline u32 ipc_read_data_low(IPC_DEV *ipcdev, IPC_TYPE type)
-{
- return readl(ipcdev->base[type][BASE_DATA] + OFFSET_DATA_LOW);
-}
-
-static inline u32 ipc_read_data_high(IPC_DEV *ipcdev, IPC_TYPE type)
-{
- return readl(ipcdev->base[type][BASE_DATA] + OFFSET_DATA_HIGH);
-}
-
-static inline void ipc_write_data_low(IPC_DEV *ipcdev, IPC_TYPE type, u32 data)
-{
- writel(data, ipcdev->base[type][BASE_DATA] + OFFSET_DATA_LOW);
-}
-
-static inline void ipc_write_data_high(IPC_DEV *ipcdev, IPC_TYPE type, u32 data)
-{
- writel(data, ipcdev->base[type][BASE_DATA] + OFFSET_DATA_HIGH);
-}
-
-static const char *ipc_err_string(int error)
-{
- if (error == IPC_PUNIT_ERR_SUCCESS)
- return "no error";
- else if (error == IPC_PUNIT_ERR_INVALID_CMD)
- return "invalid command";
- else if (error == IPC_PUNIT_ERR_INVALID_PARAMETER)
- return "invalid parameter";
- else if (error == IPC_PUNIT_ERR_CMD_TIMEOUT)
- return "command timeout";
- else if (error == IPC_PUNIT_ERR_CMD_LOCKED)
- return "command locked";
- else if (error == IPC_PUNIT_ERR_INVALID_VR_ID)
- return "invalid vr id";
- else if (error == IPC_PUNIT_ERR_VR_ERR)
- return "vr error";
- else
- return "unknown error";
-}
-
-static int intel_punit_ipc_check_status(IPC_DEV *ipcdev, IPC_TYPE type)
-{
- int loops = CMD_TIMEOUT_SECONDS * USEC_PER_SEC;
- int errcode;
- int status;
-
- if (ipcdev->irq) {
- if (!wait_for_completion_timeout(&ipcdev->cmd_complete,
- CMD_TIMEOUT_SECONDS * HZ)) {
- dev_err(ipcdev->dev, "IPC timed out\n");
- return -ETIMEDOUT;
- }
- } else {
- while ((ipc_read_status(ipcdev, type) & CMD_RUN) && --loops)
- udelay(1);
- if (!loops) {
- dev_err(ipcdev->dev, "IPC timed out\n");
- return -ETIMEDOUT;
- }
- }
-
- status = ipc_read_status(ipcdev, type);
- errcode = status & CMD_ERRCODE_MASK;
- if (errcode) {
- dev_err(ipcdev->dev, "IPC failed: %s, IPC_STS=0x%x\n",
- ipc_err_string(errcode), status);
- return -EIO;
- }
-
- return 0;
-}
-
-/**
- * intel_punit_ipc_simple_command() - Simple IPC command
- * @cmd: IPC command code.
- * @para1: First 8bit parameter, set 0 if not used.
- * @para2: Second 8bit parameter, set 0 if not used.
- *
- * Send a IPC command to P-Unit when there is no data transaction
- *
- * Return: IPC error code or 0 on success.
- */
-int intel_punit_ipc_simple_command(int cmd, int para1, int para2)
-{
- IPC_DEV *ipcdev = punit_ipcdev;
- IPC_TYPE type;
- u32 val;
- int ret;
-
- mutex_lock(&ipcdev->lock);
-
- reinit_completion(&ipcdev->cmd_complete);
- type = (cmd & IPC_PUNIT_CMD_TYPE_MASK) >> IPC_TYPE_OFFSET;
-
- val = cmd & ~IPC_PUNIT_CMD_TYPE_MASK;
- val |= CMD_RUN | para2 << CMD_PARA2_SHIFT | para1 << CMD_PARA1_SHIFT;
- ipc_write_cmd(ipcdev, type, val);
- ret = intel_punit_ipc_check_status(ipcdev, type);
-
- mutex_unlock(&ipcdev->lock);
-
- return ret;
-}
-EXPORT_SYMBOL(intel_punit_ipc_simple_command);
-
-/**
- * intel_punit_ipc_command() - IPC command with data and pointers
- * @cmd: IPC command code.
- * @para1: First 8bit parameter, set 0 if not used.
- * @para2: Second 8bit parameter, set 0 if not used.
- * @in: Input data, 32bit for BIOS cmd, two 32bit for GTD and ISPD.
- * @out: Output data.
- *
- * Send a IPC command to P-Unit with data transaction
- *
- * Return: IPC error code or 0 on success.
- */
-int intel_punit_ipc_command(u32 cmd, u32 para1, u32 para2, u32 *in, u32 *out)
-{
- IPC_DEV *ipcdev = punit_ipcdev;
- IPC_TYPE type;
- u32 val;
- int ret;
-
- mutex_lock(&ipcdev->lock);
-
- reinit_completion(&ipcdev->cmd_complete);
- type = (cmd & IPC_PUNIT_CMD_TYPE_MASK) >> IPC_TYPE_OFFSET;
-
- if (in) {
- ipc_write_data_low(ipcdev, type, *in);
- if (type == GTDRIVER_IPC || type == ISPDRIVER_IPC)
- ipc_write_data_high(ipcdev, type, *++in);
- }
-
- val = cmd & ~IPC_PUNIT_CMD_TYPE_MASK;
- val |= CMD_RUN | para2 << CMD_PARA2_SHIFT | para1 << CMD_PARA1_SHIFT;
- ipc_write_cmd(ipcdev, type, val);
-
- ret = intel_punit_ipc_check_status(ipcdev, type);
- if (ret)
- goto out;
-
- if (out) {
- *out = ipc_read_data_low(ipcdev, type);
- if (type == GTDRIVER_IPC || type == ISPDRIVER_IPC)
- *++out = ipc_read_data_high(ipcdev, type);
- }
-
-out:
- mutex_unlock(&ipcdev->lock);
- return ret;
-}
-EXPORT_SYMBOL_GPL(intel_punit_ipc_command);
-
-static irqreturn_t intel_punit_ioc(int irq, void *dev_id)
-{
- IPC_DEV *ipcdev = dev_id;
-
- complete(&ipcdev->cmd_complete);
- return IRQ_HANDLED;
-}
-
-static int intel_punit_get_bars(struct platform_device *pdev)
-{
- void __iomem *addr;
-
- /*
- * The following resources are required
- * - BIOS_IPC BASE_DATA
- * - BIOS_IPC BASE_IFACE
- */
- addr = devm_platform_ioremap_resource(pdev, 0);
- if (IS_ERR(addr))
- return PTR_ERR(addr);
- punit_ipcdev->base[BIOS_IPC][BASE_DATA] = addr;
-
- addr = devm_platform_ioremap_resource(pdev, 1);
- if (IS_ERR(addr))
- return PTR_ERR(addr);
- punit_ipcdev->base[BIOS_IPC][BASE_IFACE] = addr;
-
- /*
- * The following resources are optional
- * - ISPDRIVER_IPC BASE_DATA
- * - ISPDRIVER_IPC BASE_IFACE
- * - GTDRIVER_IPC BASE_DATA
- * - GTDRIVER_IPC BASE_IFACE
- */
- addr = devm_platform_ioremap_resource(pdev, 2);
- if (!IS_ERR(addr))
- punit_ipcdev->base[ISPDRIVER_IPC][BASE_DATA] = addr;
-
- addr = devm_platform_ioremap_resource(pdev, 3);
- if (!IS_ERR(addr))
- punit_ipcdev->base[ISPDRIVER_IPC][BASE_IFACE] = addr;
-
- addr = devm_platform_ioremap_resource(pdev, 4);
- if (!IS_ERR(addr))
- punit_ipcdev->base[GTDRIVER_IPC][BASE_DATA] = addr;
-
- addr = devm_platform_ioremap_resource(pdev, 5);
- if (!IS_ERR(addr))
- punit_ipcdev->base[GTDRIVER_IPC][BASE_IFACE] = addr;
-
- return 0;
-}
-
-static int intel_punit_ipc_probe(struct platform_device *pdev)
-{
- int irq, ret;
-
- punit_ipcdev = devm_kzalloc(&pdev->dev,
- sizeof(*punit_ipcdev), GFP_KERNEL);
- if (!punit_ipcdev)
- return -ENOMEM;
-
- platform_set_drvdata(pdev, punit_ipcdev);
-
- irq = platform_get_irq_optional(pdev, 0);
- if (irq < 0) {
- dev_warn(&pdev->dev, "Invalid IRQ, using polling mode\n");
- } else {
- ret = devm_request_irq(&pdev->dev, irq, intel_punit_ioc,
- IRQF_NO_SUSPEND, "intel_punit_ipc",
- &punit_ipcdev);
- if (ret) {
- dev_err(&pdev->dev, "Failed to request irq: %d\n", irq);
- return ret;
- }
- punit_ipcdev->irq = irq;
- }
-
- ret = intel_punit_get_bars(pdev);
- if (ret)
- return ret;
-
- punit_ipcdev->dev = &pdev->dev;
- mutex_init(&punit_ipcdev->lock);
- init_completion(&punit_ipcdev->cmd_complete);
-
- return 0;
-}
-
-static int intel_punit_ipc_remove(struct platform_device *pdev)
-{
- return 0;
-}
-
-static const struct acpi_device_id punit_ipc_acpi_ids[] = {
- { "INT34D4", 0 },
- { }
-};
-MODULE_DEVICE_TABLE(acpi, punit_ipc_acpi_ids);
-
-static struct platform_driver intel_punit_ipc_driver = {
- .probe = intel_punit_ipc_probe,
- .remove = intel_punit_ipc_remove,
- .driver = {
- .name = "intel_punit_ipc",
- .acpi_match_table = ACPI_PTR(punit_ipc_acpi_ids),
- },
-};
-
-static int __init intel_punit_ipc_init(void)
-{
- return platform_driver_register(&intel_punit_ipc_driver);
-}
-
-static void __exit intel_punit_ipc_exit(void)
-{
- platform_driver_unregister(&intel_punit_ipc_driver);
-}
-
-MODULE_AUTHOR("Zha Qipeng <qipeng.zha@intel.com>");
-MODULE_DESCRIPTION("Intel P-Unit IPC driver");
-MODULE_LICENSE("GPL v2");
-
-/* Some modules are dependent on this, so init earlier */
-fs_initcall(intel_punit_ipc_init);
-module_exit(intel_punit_ipc_exit);
projects / linux.git / commitdiff