From patchwork Fri Aug 24 21:33:35 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ajay Gupta X-Patchwork-Id: 10575907 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id B03FE1390 for ; Fri, 24 Aug 2018 21:33:59 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 92CE82BECB for ; Fri, 24 Aug 2018 21:33:59 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 85AB92BEFC; Fri, 24 Aug 2018 21:33:59 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.9 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 257E52BECB for ; Fri, 24 Aug 2018 21:33:58 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727091AbeHYBKS (ORCPT ); Fri, 24 Aug 2018 21:10:18 -0400 Received: from hqemgate16.nvidia.com ([216.228.121.65]:9225 "EHLO hqemgate16.nvidia.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727026AbeHYBKS (ORCPT ); Fri, 24 Aug 2018 21:10:18 -0400 Received: from hqpgpgate101.nvidia.com (Not Verified[216.228.121.13]) by hqemgate16.nvidia.com (using TLS: TLSv1.2, DES-CBC3-SHA) id ; Fri, 24 Aug 2018 14:33:43 -0700 Received: from HQMAIL103.nvidia.com ([172.20.161.6]) by hqpgpgate101.nvidia.com (PGP Universal service); Fri, 24 Aug 2018 14:33:52 -0700 X-PGP-Universal: processed; by hqpgpgate101.nvidia.com on Fri, 24 Aug 2018 14:33:52 -0700 Received: from BGMAIL101.nvidia.com (10.25.59.10) by HQMAIL103.nvidia.com (172.20.187.11) with Microsoft SMTP Server (TLS) id 15.0.1347.2; Fri, 24 Aug 2018 21:33:50 +0000 Received: from ajayg.nvidia.com (172.17.171.117) by bgmail101.nvidia.com (10.25.59.10) with Microsoft SMTP Server (TLS) id 15.0.1347.2; Fri, 24 Aug 2018 21:33:45 +0000 From: Ajay Gupta To: , CC: , , Ajay Gupta Subject: [PATCH v2 1/2] i2c: buses: add i2c bus driver for NVIDIA GPU Date: Fri, 24 Aug 2018 14:33:35 -0700 Message-ID: <1535146416-11754-1-git-send-email-ajayg@nvidia.com> X-Mailer: git-send-email 2.7.4 MIME-Version: 1.0 X-Originating-IP: [172.17.171.117] X-ClientProxiedBy: BGMAIL103.nvidia.com (10.25.59.12) To bgmail101.nvidia.com (10.25.59.10) Sender: linux-usb-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Latest NVIDIA GPU card has USB Type-C interface. There is a Type-C controller which can be accessed over I2C. This driver add I2C bus driver to communicate with Type-C controller. I2C client driver will be part of USB Type-C UCSI driver. Signed-off-by: Ajay Gupta --- Changes from v1 -> v2: None Documentation/i2c/busses/i2c-gpu | 18 ++ MAINTAINERS | 7 + drivers/i2c/busses/Kconfig | 9 + drivers/i2c/busses/Makefile | 1 + drivers/i2c/busses/i2c-gpu.c | 493 +++++++++++++++++++++++++++++++++++++++ 5 files changed, 528 insertions(+) create mode 100644 Documentation/i2c/busses/i2c-gpu create mode 100644 drivers/i2c/busses/i2c-gpu.c diff --git a/Documentation/i2c/busses/i2c-gpu b/Documentation/i2c/busses/i2c-gpu new file mode 100644 index 0000000..873ba34 --- /dev/null +++ b/Documentation/i2c/busses/i2c-gpu @@ -0,0 +1,18 @@ +Kernel driver i2c-gpu + +Datasheet: not publicly available. + +Authors: + Ajay Gupta + +Description +----------- + +i2c-gpu is a driver for I2C controller included in NVIDIA Turing and later +GPUs and it is used to communicate with Type-C controller on GPUs. + +If your 'lspci -v' listing shows something like the following, + +01:00.3 Serial bus controller [0c80]: NVIDIA Corporation Device 1ad9 (rev a1) + +then this driver should support the I2C controller of your GPU. diff --git a/MAINTAINERS b/MAINTAINERS index b2fcd1c..e99f8a2 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -6796,6 +6796,13 @@ L: linux-acpi@vger.kernel.org S: Maintained F: drivers/i2c/i2c-core-acpi.c +I2C CONTROLLER DRIVER FOR NVIDIA GPU +M: Ajay Gupta +L: linux-i2c@vger.kernel.org +S: Maintained +F: Documentation/i2c/busses/i2c-gpu +F: drivers/i2c/busses/i2c-gpu.c + I2C MUXES M: Peter Rosin L: linux-i2c@vger.kernel.org diff --git a/drivers/i2c/busses/Kconfig b/drivers/i2c/busses/Kconfig index 451d4ae..ff8b2d4 100644 --- a/drivers/i2c/busses/Kconfig +++ b/drivers/i2c/busses/Kconfig @@ -224,6 +224,15 @@ config I2C_NFORCE2_S4985 This driver can also be built as a module. If so, the module will be called i2c-nforce2-s4985. +config I2C_GPU + tristate "NVIDIA GPU I2C controller" + depends on PCI + help + If you say yes to this option, support will be included for the + NVIDIA GPU I2C controller which is used to communicate with the GPU's + Type-C controller. This driver can also be built as a module called + i2c-gpu.ko. + config I2C_SIS5595 tristate "SiS 5595" depends on PCI diff --git a/drivers/i2c/busses/Makefile b/drivers/i2c/busses/Makefile index 18b26af..15d2894 100644 --- a/drivers/i2c/busses/Makefile +++ b/drivers/i2c/busses/Makefile @@ -140,5 +140,6 @@ obj-$(CONFIG_I2C_SIBYTE) += i2c-sibyte.o obj-$(CONFIG_I2C_XGENE_SLIMPRO) += i2c-xgene-slimpro.o obj-$(CONFIG_SCx200_ACB) += scx200_acb.o obj-$(CONFIG_I2C_FSI) += i2c-fsi.o +obj-$(CONFIG_I2C_GPU) += i2c-gpu.o ccflags-$(CONFIG_I2C_DEBUG_BUS) := -DDEBUG diff --git a/drivers/i2c/busses/i2c-gpu.c b/drivers/i2c/busses/i2c-gpu.c new file mode 100644 index 0000000..0fd2944 --- /dev/null +++ b/drivers/i2c/busses/i2c-gpu.c @@ -0,0 +1,493 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Nvidia GPU I2C controller Driver + * + * Copyright (C) 2018 NVIDIA Corporation. All rights reserved. + * Author: Ajay Gupta + * + */ +#include +#include +#include +#include +#include +#include +#include +#include + +/* STATUS definitions */ +#define STATUS_SUCCESS 0 +#define STATUS_UNSUCCESSFUL 0x80000000UL +#define STATUS_TIMEOUT 0x80000001UL +#define STATUS_IO_DEVICE_ERROR 0x80000002UL +#define STATUS_IO_TIMEOUT 0x80000004UL +#define STATUS_IO_PREEMPTED 0x80000008UL + +/* Cypress Type-C controllers (CCGx) device */ +#define CCGX_I2C_DEV_ADDRESS 0x08 + +/* I2C definitions */ +#define I2C_MST_CNTL 0x00 +#define I2C_MST_CNTL_GEN_START (1 << 0) +#define I2C_MST_CNTL_GEN_STOP (1 << 1) +#define I2C_MST_CNTL_CMD_NONE (0 << 2) +#define I2C_MST_CNTL_CMD_READ (1 << 2) +#define I2C_MST_CNTL_CMD_WRITE (2 << 2) +#define I2C_MST_CNTL_CMD_RESET (3 << 2) +#define I2C_MST_CNTL_GEN_RAB (1 << 4) +#define I2C_MST_CNTL_BURST_SIZE_SHIFT (6) +#define I2C_MST_CNTL_GEN_NACK (1 << 28) +#define I2C_MST_CNTL_STATUS (3 << 29) +#define I2C_MST_CNTL_STATUS_OKAY (0 << 29) +#define I2C_MST_CNTL_STATUS_NO_ACK (1 << 29) +#define I2C_MST_CNTL_STATUS_TIMEOUT (2 << 29) +#define I2C_MST_CNTL_STATUS_BUS_BUSY (3 << 29) +#define I2C_MST_CNTL_CYCLE_TRIGGER (1 << 31) + +#define I2C_MST_ADDR 0x04 +#define I2C_MST_ADDR_DAB 0 + +#define I2C_MST_I2C0_TIMING 0x08 +#define I2C_MST_I2C0_TIMING_SCL_PERIOD_100KHZ (0x10e << 0) +#define I2C_MST_I2C0_TIMING_SCL_PERIOD_200KHZ (0x087 << 0) +#define I2C_MST_I2C0_TIMING_TIMEOUT_CLK_CNT 16 +#define I2C_MST_I2C0_TIMING_TIMEOUT_CLK_CNT_MAX 255 +#define I2C_MST_I2C0_TIMING_TIMEOUT_CHECK (1 << 24) + +#define I2C_MST_DATA 0x0c + +#define I2C_MST_HYBRID_PADCTL 0x20 +#define I2C_MST_HYBRID_PADCTL_MODE_I2C (1 << 0) +#define I2C_MST_HYBRID_PADCTL_I2C_SCL_INPUT_RCV (1 << 14) +#define I2C_MST_HYBRID_PADCTL_I2C_SDA_INPUT_RCV (1 << 15) + +/* PCI driver data */ +struct gpu_i2c_dev { + struct pci_dev *pci_dev; + void __iomem *regs; + struct i2c_adapter adapter; + struct i2c_client *client; + struct mutex mutex; + bool do_start; +}; + +static void enable_i2c_bus(struct gpu_i2c_dev *gdev) +{ + struct device *dev = &gdev->pci_dev->dev; + u32 val; + + /* enable I2C */ + val = readl(gdev->regs + I2C_MST_HYBRID_PADCTL); + val |= I2C_MST_HYBRID_PADCTL_MODE_I2C | + I2C_MST_HYBRID_PADCTL_I2C_SCL_INPUT_RCV | + I2C_MST_HYBRID_PADCTL_I2C_SDA_INPUT_RCV; + + dev_dbg(dev, "%s: %p (I2C_MST_HYBRID_PADCTL) <- %08x", __func__, + (gdev->regs + I2C_MST_HYBRID_PADCTL), val); + + writel(val, gdev->regs + I2C_MST_HYBRID_PADCTL); + + /* enable 100KHZ mode */ + val = 0; + val |= I2C_MST_I2C0_TIMING_SCL_PERIOD_100KHZ; + val |= (I2C_MST_I2C0_TIMING_TIMEOUT_CLK_CNT_MAX + << I2C_MST_I2C0_TIMING_TIMEOUT_CLK_CNT); + val |= I2C_MST_I2C0_TIMING_TIMEOUT_CHECK; + + dev_dbg(dev, "%s: %p (I2C_MST_I2C0_TIMING) <- %08x", __func__, + gdev->regs + I2C_MST_I2C0_TIMING, val); + writel(val, gdev->regs + I2C_MST_I2C0_TIMING); +} + +static u32 i2c_check_status(struct gpu_i2c_dev *gdev) +{ + struct device *dev = &gdev->pci_dev->dev; + unsigned long target = jiffies + msecs_to_jiffies(1000); + u32 status = STATUS_UNSUCCESSFUL; + u32 val; + + while (time_is_after_jiffies(target)) { + val = readl(gdev->regs + I2C_MST_CNTL); + if ((val & I2C_MST_CNTL_CYCLE_TRIGGER) != + I2C_MST_CNTL_CYCLE_TRIGGER) + break; + if ((val & I2C_MST_CNTL_STATUS) != + I2C_MST_CNTL_STATUS_BUS_BUSY) + break; + usleep_range(1000, 2000); + } + + if (time_is_before_jiffies(target)) { + dev_err(dev, "%si2c timeout", __func__); + return status; + } + + val = readl(gdev->regs + I2C_MST_CNTL); + switch (val & I2C_MST_CNTL_STATUS) { + case I2C_MST_CNTL_STATUS_OKAY: + status = STATUS_SUCCESS; + break; + case I2C_MST_CNTL_STATUS_NO_ACK: + status = STATUS_IO_DEVICE_ERROR; + break; + case I2C_MST_CNTL_STATUS_TIMEOUT: + status = STATUS_IO_TIMEOUT; + break; + case I2C_MST_CNTL_STATUS_BUS_BUSY: + status = STATUS_IO_PREEMPTED; + break; + default: + break; + } + return status; +} + +static u32 i2c_read(struct gpu_i2c_dev *gdev, u8 *data, u16 len) +{ + struct device *dev = &gdev->pci_dev->dev; + u32 status; + u32 val = 0; + + val |= I2C_MST_CNTL_GEN_START | I2C_MST_CNTL_GEN_STOP | + I2C_MST_CNTL_CMD_READ | (len << I2C_MST_CNTL_BURST_SIZE_SHIFT) | + I2C_MST_CNTL_CYCLE_TRIGGER | I2C_MST_CNTL_GEN_NACK; + val &= ~I2C_MST_CNTL_GEN_RAB; + writel(val, gdev->regs + I2C_MST_CNTL); + + status = i2c_check_status(gdev); + if (status == STATUS_UNSUCCESSFUL) { + dev_err(dev, "%s failed\n", __func__); + return status; + } + + val = readl(gdev->regs + I2C_MST_DATA); + switch (len) { + case 1: + data[0] = (val >> 0) & 0xff; + break; + case 2: + data[0] = (val >> 8) & 0xff; + data[1] = (val >> 0) & 0xff; + break; + case 3: + data[0] = (val >> 16) & 0xff; + data[1] = (val >> 8) & 0xff; + data[2] = (val >> 0) & 0xff; + break; + case 4: + data[0] = (val >> 24) & 0xff; + data[1] = (val >> 16) & 0xff; + data[2] = (val >> 8) & 0xff; + data[3] = (val >> 0) & 0xff; + break; + default: + break; + } + return status; +} + +static u32 i2c_manual_start(struct gpu_i2c_dev *gdev, u16 addr) +{ + u32 val = 0; + + val = addr << I2C_MST_ADDR_DAB; + writel(val, gdev->regs + I2C_MST_ADDR); + + val = 0; + val |= I2C_MST_CNTL_GEN_START | I2C_MST_CNTL_CMD_NONE | + I2C_MST_CNTL_GEN_NACK; + val &= ~(I2C_MST_CNTL_GEN_STOP | I2C_MST_CNTL_GEN_RAB); + writel(val, gdev->regs + I2C_MST_CNTL); + + return i2c_check_status(gdev); +} + +static u32 i2c_manual_stop(struct gpu_i2c_dev *gdev) +{ + u32 val = 0; + + val |= I2C_MST_CNTL_GEN_STOP | I2C_MST_CNTL_CMD_NONE | + I2C_MST_CNTL_GEN_NACK; + val &= ~(I2C_MST_CNTL_GEN_START | I2C_MST_CNTL_GEN_RAB); + writel(val, gdev->regs + I2C_MST_CNTL); + + return i2c_check_status(gdev); +} + +static u32 i2c_manual_write(struct gpu_i2c_dev *gdev, u8 data) +{ + u32 val = 0; + + writel(data, gdev->regs + I2C_MST_DATA); + + val |= I2C_MST_CNTL_CMD_WRITE | (1 << I2C_MST_CNTL_BURST_SIZE_SHIFT) | + I2C_MST_CNTL_GEN_NACK; + val &= ~(I2C_MST_CNTL_GEN_START | I2C_MST_CNTL_GEN_STOP + | I2C_MST_CNTL_GEN_RAB); + writel(val, gdev->regs + I2C_MST_CNTL); + + return i2c_check_status(gdev); +} + +/* gdev i2c adapter */ +static int gpu_i2c_master_xfer(struct i2c_adapter *adap, + struct i2c_msg *msgs, int num) +{ + struct gpu_i2c_dev *gdev = i2c_get_adapdata(adap); + struct device *dev = &gdev->pci_dev->dev; + int retry1b = 10; + u32 status; + int i, j; + + dev_dbg(dev, "%s: adap %p msgs %p num %d\n", __func__, adap, msgs, num); + + mutex_lock(&gdev->mutex); + + for (i = 0; i < num; i++) { + if (msgs[i].flags & I2C_M_RD) { +retry2: + status = i2c_read(gdev, msgs[i].buf, msgs[i].len); + if (status != STATUS_SUCCESS) { + dev_err(dev, + "%s:%d i2c_read failed %08lx", __func__, + __LINE__, (unsigned long)status); + + if (--retry1b > 0) { + usleep_range(10000, 11000); + goto retry2; + } + break; + } + gdev->do_start = true; + } else if (msgs[i].flags & I2C_M_STOP) { + status = i2c_manual_stop(gdev); + if (status != STATUS_SUCCESS) { + dev_err(dev, + "%s:%d i2c_manual_stop failed %08lx", __func__, + __LINE__, (unsigned long)status); + goto exit; + } + gdev->do_start = true; + } else { + dev_dbg(dev, "!I2C_M_RD start %d len %d\n", + gdev->do_start, msgs[i].len); + if (gdev->do_start) { + status = i2c_manual_start(gdev, msgs[i].addr); + if (status != STATUS_SUCCESS) { + dev_err(dev, + "%s:%d i2c_manual_start failed %08lx", + __func__, __LINE__, + (unsigned long)status); + goto exit; + } + status = i2c_manual_write(gdev, + msgs[i].addr << 1); + if (status != STATUS_SUCCESS) { + dev_err(dev, + "%s:%d i2c_manual_write failed %08lx", + __func__, __LINE__, + (unsigned long)status); + goto exit_stop; + } + gdev->do_start = false; + } + for (j = 0; j < msgs[i].len; j++) { + status = i2c_manual_write(gdev, + *(msgs[i].buf + j)); + if (status != STATUS_SUCCESS) { + dev_err(dev, + "%s:%d i2c_manual_write failed %08lx", + __func__, __LINE__, + (unsigned long)status); + goto exit_stop; + } + } + } + } + goto exit; +exit_stop: + status = i2c_manual_stop(gdev); + if (status != STATUS_SUCCESS) + dev_err(dev, "i2c_manual_stop failed %x", status); +exit: + mutex_unlock(&gdev->mutex); + return i; +} + +static u32 gpu_i2c_functionality(struct i2c_adapter *adap) +{ + return I2C_FUNC_I2C | I2C_FUNC_SMBUS_EMUL; +} + +static const struct i2c_algorithm gpu_i2c_algorithm = { + .master_xfer = gpu_i2c_master_xfer, + .functionality = gpu_i2c_functionality, +}; + +static int gpu_i2c_dev_init(struct gpu_i2c_dev *gdev) +{ + gdev->do_start = true; + + /* initialize mutex */ + mutex_init(&gdev->mutex); + + /* initialize i2c */ + enable_i2c_bus(gdev); + + return 0; +} + +struct i2c_board_info gpu_i2c_ucsi_board_info = { + I2C_BOARD_INFO("i2c-gpu-ucsi", CCGX_I2C_DEV_ADDRESS), +}; + +#define PCI_CLASS_SERIAL_UNKNOWN 0x0c80 +/* pci driver */ +static const struct pci_device_id gpu_i2c_ids[] = { + { PCI_VENDOR_ID_NVIDIA, PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID, + PCI_CLASS_SERIAL_UNKNOWN << 8, 0xffffff00}, + { }, +}; +MODULE_DEVICE_TABLE(pci, gpu_i2c_ids); + +static int gpu_i2c_probe(struct pci_dev *dev, const struct pci_device_id *id) +{ + struct gpu_i2c_dev *gdev; + int status; + + dev_info(&dev->dev, + "dev %p id %08x %08x sub %08x %08x class %08x %08x\n", + dev, id->vendor, id->device, id->subvendor, id->subdevice, + id->class, id->class_mask); + + gdev = devm_kzalloc(&dev->dev, sizeof(struct gpu_i2c_dev), GFP_KERNEL); + if (!gdev) + return -ENOMEM; + + gdev->pci_dev = dev; + pci_set_drvdata(dev, gdev); + + status = pci_enable_device(dev); + if (status < 0) { + dev_err(&dev->dev, "pci_enable_device failed - %d\n", status); + return status; + } + + pci_set_master(dev); + + gdev->regs = pci_iomap(dev, 0, 0); + if (!gdev->regs) { + dev_err(&dev->dev, "pci_iomap failed\n"); + status = -ENOMEM; + goto iomap_err; + } + + status = pci_enable_msi(dev); + if (status < 0) { + dev_err(&dev->dev, "pci_enable_msi failed - %d\n", status); + goto enable_msi_err; + } + + status = gpu_i2c_dev_init(gdev); + if (status < 0) { + dev_err(&dev->dev, "gpu_i2c_dev_init failed - %d\n", status); + goto i2c_init_err; + } + + i2c_set_adapdata(&gdev->adapter, gdev); + gdev->adapter.owner = THIS_MODULE; + strlcpy(gdev->adapter.name, "NVIDIA GPU I2C adapter", + sizeof(gdev->adapter.name)); + gdev->adapter.algo = &gpu_i2c_algorithm; + gdev->adapter.dev.parent = &dev->dev; + status = i2c_add_adapter(&gdev->adapter); + if (status < 0) { + dev_err(&dev->dev, "i2c_add_adapter failed - %d\n", status); + goto add_adapter_err; + } + + gpu_i2c_ucsi_board_info.irq = dev->irq; + gdev->client = i2c_new_device(&gdev->adapter, + &gpu_i2c_ucsi_board_info); + + if (!gdev->client) { + dev_err(&dev->dev, "i2c_new_device failed - %d\n", status); + status = -ENODEV; + goto add_adapter_err; + } + + dev_set_drvdata(&dev->dev, gdev); + pm_runtime_put_noidle(&dev->dev); + pm_runtime_allow(&dev->dev); + + return 0; + +add_adapter_err: + i2c_del_adapter(&gdev->adapter); +i2c_init_err: + pci_disable_msi(dev); +enable_msi_err: + pci_iounmap(dev, gdev->regs); +iomap_err: + pci_disable_device(dev); + return status; +} + +static void gpu_i2c_remove(struct pci_dev *dev) +{ + struct gpu_i2c_dev *gdev = pci_get_drvdata(dev); + + i2c_del_adapter(&gdev->adapter); + pci_disable_msi(dev); + pci_iounmap(dev, gdev->regs); +} + +static int gpu_i2c_suspend(struct device *dev) +{ + dev_dbg(dev, "%s\n", __func__); + + return 0; +} + +static int gpu_i2c_resume(struct device *dev) +{ + struct gpu_i2c_dev *gdev = dev_get_drvdata(dev); + + dev_dbg(dev, "%s\n", __func__); + + enable_i2c_bus(gdev); + + return 0; +} + +static int gpu_i2c_idle(struct device *dev) +{ + struct gpu_i2c_dev *gdev = dev_get_drvdata(dev); + + if (!mutex_trylock(&gdev->mutex)) { + dev_info(dev, "%s: -EBUSY\n", __func__); + return -EBUSY; + } + mutex_unlock(&gdev->mutex); + + return 0; +} + +UNIVERSAL_DEV_PM_OPS(gpu_i2c_driver_pm, gpu_i2c_suspend, gpu_i2c_resume, + gpu_i2c_idle); + +static struct pci_driver gpu_i2c_driver = { + .name = "gpu_i2c_driver", + .id_table = gpu_i2c_ids, + .probe = gpu_i2c_probe, + .remove = gpu_i2c_remove, + .driver = { + .pm = &gpu_i2c_driver_pm, + }, +}; + +module_pci_driver(gpu_i2c_driver); + +MODULE_AUTHOR("Ajay Gupta "); +MODULE_DESCRIPTION("Nvidia GPU I2C controller Driver"); +MODULE_LICENSE("GPL v2");