forked from luck/tmp_suning_uos_patched
0848c94fb4
Currently the MFD core supports remapping MFD cell interrupts using an irqdomain but only if the MFD is being instantiated using device tree and only if the device tree bindings use the pattern of registering IPs in the device tree with compatible properties. This will be actively harmful for drivers which support non-DT platforms and use this pattern for their DT bindings as it will mean that the core will silently change remapping behaviour and it is also limiting for drivers which don't do DT with this particular pattern. There is also a potential fragility if there are interrupts not associated with MFD cells and all the cells are omitted from the device tree for some reason. Instead change the code to take an IRQ domain as an optional argument, allowing drivers to take the decision about the parent domain for their interrupts. The one current user of this feature is ab8500-core, it has the domain lookup pushed out into the driver. Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
194 lines
4.8 KiB
C
194 lines
4.8 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/init.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 __devinitdata struct resource cs5535_mfd_resources[NR_BARS];
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static __devinitdata 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 __devinit cs5535_clone_olpc_cells(void)
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{
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const char *acpi_clones[] = { "olpc-xo1-pm-acpi", "olpc-xo1-sci-acpi" };
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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 __devinit 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 __devexit 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 DEFINE_PCI_DEVICE_TABLE(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 = __devexit_p(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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