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![Lee Jones](/assets/img/avatar_default.png)
CS5535 is the only user of mfd_clone_cell(). It makes more sense to register child devices in the traditional way and remove the quite bespoke mfd_clone_cell() call from the MFD API. Signed-off-by: Lee Jones <lee.jones@linaro.org> Reviewed-by: Daniel Thompson <daniel.thompson@linaro.org>
164 lines
3.8 KiB
C
164 lines
3.8 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 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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.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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.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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.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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.name = "cs5535-pms",
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.num_resources = 1,
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.resources = &cs5535_mfd_resources[PMS_BAR],
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},
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};
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static struct mfd_cell cs5535_olpc_mfd_cells[] = {
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{
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.name = "olpc-xo1-pm-acpi",
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.num_resources = 1,
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.resources = &cs5535_mfd_resources[ACPI_BAR],
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},
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{
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.name = "olpc-xo1-sci-acpi",
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.num_resources = 1,
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.resources = &cs5535_mfd_resources[ACPI_BAR],
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},
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};
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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, bar;
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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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for (bar = 0; bar < NR_BARS; bar++) {
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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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}
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err = pci_request_region(pdev, PMS_BAR, DRV_NAME);
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if (err) {
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dev_err(&pdev->dev, "Failed to request PMS_BAR's IO region\n");
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goto err_disable;
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}
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err = mfd_add_devices(&pdev->dev, PLATFORM_DEVID_NONE, 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,
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"Failed to add CS5535 sub-devices: %d\n", err);
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goto err_release_pms;
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}
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if (machine_is_olpc()) {
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err = pci_request_region(pdev, ACPI_BAR, DRV_NAME);
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if (err) {
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dev_err(&pdev->dev,
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"Failed to request ACPI_BAR's IO region\n");
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goto err_remove_devices;
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}
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err = mfd_add_devices(&pdev->dev, PLATFORM_DEVID_NONE,
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cs5535_olpc_mfd_cells,
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ARRAY_SIZE(cs5535_olpc_mfd_cells),
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NULL, 0, NULL);
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if (err) {
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dev_err(&pdev->dev,
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"Failed to add CS5535 OLPC sub-devices: %d\n",
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err);
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goto err_release_acpi;
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}
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}
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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_release_acpi:
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pci_release_region(pdev, ACPI_BAR);
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err_remove_devices:
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mfd_remove_devices(&pdev->dev);
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err_release_pms:
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pci_release_region(pdev, PMS_BAR);
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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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if (machine_is_olpc())
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pci_release_region(pdev, ACPI_BAR);
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pci_release_region(pdev, PMS_BAR);
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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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