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WARNING: Missing a blank line after declarations + struct resource *res; + res = platform_get_resource(pdev, IORESOURCE_IO, 0); WARNING: char * array declaration might be better as static const + const char *acpi_clones[] = { "olpc-xo1-pm-acpi", "olpc-xo1-sci-acpi" }; total: 0 errors, 2 warnings, 192 lines checked Signed-off-by: Lee Jones <lee.jones@linaro.org>
196 lines
4.7 KiB
C
196 lines
4.7 KiB
C
/*
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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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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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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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