![Thomas Gleixner](/assets/img/avatar_default.png)
Based on 1 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms of the gnu general public license version 2 as published by the free software foundation this program is distributed in the hope that it will be useful but without any warranty without even the implied warranty of merchantability or fitness for a particular purpose see the gnu general public license for more details you should have received a copy of the gnu general public license along with this program if not write to the free software foundation inc 675 mass ave cambridge ma 02139 usa extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference in 44 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Allison Randal <allison@lohutok.net> Reviewed-by: Steve Winslow <swinslow@gmail.com> Reviewed-by: Alexios Zavras <alexios.zavras@intel.com> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190528170025.980374610@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
185 lines
4.1 KiB
C
185 lines
4.1 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* cs5535-mfd.c - core MFD driver for CS5535/CS5536 southbridges
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*
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* The CS5535 and CS5536 has an ISA bridge on the PCI bus that is
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* used for accessing GPIOs, MFGPTs, ACPI, etc. Each subdevice has
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* an IO range that's specified in a single BAR. The BAR order is
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* hardcoded in the CS553x specifications.
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*
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* Copyright (c) 2010 Andres Salomon <dilinger@queued.net>
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*/
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#include <linux/kernel.h>
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#include <linux/mfd/core.h>
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#include <linux/module.h>
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#include <linux/pci.h>
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#include <asm/olpc.h>
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#define DRV_NAME "cs5535-mfd"
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enum cs5535_mfd_bars {
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SMB_BAR = 0,
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GPIO_BAR = 1,
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MFGPT_BAR = 2,
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PMS_BAR = 4,
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ACPI_BAR = 5,
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NR_BARS,
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};
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static int cs5535_mfd_res_enable(struct platform_device *pdev)
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{
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struct resource *res;
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res = platform_get_resource(pdev, IORESOURCE_IO, 0);
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if (!res) {
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dev_err(&pdev->dev, "can't fetch device resource info\n");
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return -EIO;
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}
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if (!request_region(res->start, resource_size(res), DRV_NAME)) {
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dev_err(&pdev->dev, "can't request region\n");
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return -EIO;
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}
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return 0;
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}
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static int cs5535_mfd_res_disable(struct platform_device *pdev)
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{
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struct resource *res;
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res = platform_get_resource(pdev, IORESOURCE_IO, 0);
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if (!res) {
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dev_err(&pdev->dev, "can't fetch device resource info\n");
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return -EIO;
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}
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release_region(res->start, resource_size(res));
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return 0;
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}
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static struct resource cs5535_mfd_resources[NR_BARS];
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static struct mfd_cell cs5535_mfd_cells[] = {
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{
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.id = SMB_BAR,
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.name = "cs5535-smb",
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.num_resources = 1,
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.resources = &cs5535_mfd_resources[SMB_BAR],
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},
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{
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.id = GPIO_BAR,
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.name = "cs5535-gpio",
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.num_resources = 1,
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.resources = &cs5535_mfd_resources[GPIO_BAR],
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},
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{
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.id = MFGPT_BAR,
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.name = "cs5535-mfgpt",
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.num_resources = 1,
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.resources = &cs5535_mfd_resources[MFGPT_BAR],
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},
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{
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.id = PMS_BAR,
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.name = "cs5535-pms",
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.num_resources = 1,
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.resources = &cs5535_mfd_resources[PMS_BAR],
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.enable = cs5535_mfd_res_enable,
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.disable = cs5535_mfd_res_disable,
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},
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{
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.id = ACPI_BAR,
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.name = "cs5535-acpi",
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.num_resources = 1,
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.resources = &cs5535_mfd_resources[ACPI_BAR],
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.enable = cs5535_mfd_res_enable,
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.disable = cs5535_mfd_res_disable,
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},
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};
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#ifdef CONFIG_OLPC
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static void cs5535_clone_olpc_cells(void)
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{
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static const char *acpi_clones[] = {
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"olpc-xo1-pm-acpi",
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"olpc-xo1-sci-acpi"
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};
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if (!machine_is_olpc())
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return;
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mfd_clone_cell("cs5535-acpi", acpi_clones, ARRAY_SIZE(acpi_clones));
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}
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#else
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static void cs5535_clone_olpc_cells(void) { }
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#endif
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static int cs5535_mfd_probe(struct pci_dev *pdev,
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const struct pci_device_id *id)
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{
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int err, i;
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err = pci_enable_device(pdev);
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if (err)
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return err;
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/* fill in IO range for each cell; subdrivers handle the region */
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for (i = 0; i < ARRAY_SIZE(cs5535_mfd_cells); i++) {
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int bar = cs5535_mfd_cells[i].id;
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struct resource *r = &cs5535_mfd_resources[bar];
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r->flags = IORESOURCE_IO;
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r->start = pci_resource_start(pdev, bar);
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r->end = pci_resource_end(pdev, bar);
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/* id is used for temporarily storing BAR; unset it now */
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cs5535_mfd_cells[i].id = 0;
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}
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err = mfd_add_devices(&pdev->dev, -1, cs5535_mfd_cells,
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ARRAY_SIZE(cs5535_mfd_cells), NULL, 0, NULL);
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if (err) {
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dev_err(&pdev->dev, "MFD add devices failed: %d\n", err);
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goto err_disable;
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}
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cs5535_clone_olpc_cells();
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dev_info(&pdev->dev, "%zu devices registered.\n",
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ARRAY_SIZE(cs5535_mfd_cells));
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return 0;
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err_disable:
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pci_disable_device(pdev);
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return err;
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}
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static void cs5535_mfd_remove(struct pci_dev *pdev)
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{
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mfd_remove_devices(&pdev->dev);
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pci_disable_device(pdev);
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}
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static const struct pci_device_id cs5535_mfd_pci_tbl[] = {
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{ PCI_DEVICE(PCI_VENDOR_ID_NS, PCI_DEVICE_ID_NS_CS5535_ISA) },
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{ PCI_DEVICE(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_CS5536_ISA) },
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{ 0, }
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};
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MODULE_DEVICE_TABLE(pci, cs5535_mfd_pci_tbl);
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static struct pci_driver cs5535_mfd_driver = {
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.name = DRV_NAME,
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.id_table = cs5535_mfd_pci_tbl,
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.probe = cs5535_mfd_probe,
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.remove = cs5535_mfd_remove,
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};
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module_pci_driver(cs5535_mfd_driver);
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MODULE_AUTHOR("Andres Salomon <dilinger@queued.net>");
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MODULE_DESCRIPTION("MFD driver for CS5535/CS5536 southbridge's ISA PCI device");
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MODULE_LICENSE("GPL");
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