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Release 4.14 drivers/mfd/cs5535-mfd.c

Directory: drivers/mfd
/*
 * cs5535-mfd.c - core MFD driver for CS5535/CS5536 southbridges
 *
 * The CS5535 and CS5536 has an ISA bridge on the PCI bus that is
 * used for accessing GPIOs, MFGPTs, ACPI, etc.  Each subdevice has
 * an IO range that's specified in a single BAR.  The BAR order is
 * hardcoded in the CS553x specifications.
 *
 * Copyright (c) 2010  Andres Salomon <dilinger@queued.net>
 *
 * 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.
 */

#include <linux/kernel.h>
#include <linux/mfd/core.h>
#include <linux/module.h>
#include <linux/pci.h>
#include <asm/olpc.h>


#define DRV_NAME "cs5535-mfd"


enum cs5535_mfd_bars {
	
SMB_BAR = 0,
	
GPIO_BAR = 1,
	
MFGPT_BAR = 2,
	
PMS_BAR = 4,
	
ACPI_BAR = 5,
	
NR_BARS,
};


static int cs5535_mfd_res_enable(struct platform_device *pdev) { struct resource *res; res = platform_get_resource(pdev, IORESOURCE_IO, 0); if (!res) { dev_err(&pdev->dev, "can't fetch device resource info\n"); return -EIO; } if (!request_region(res->start, resource_size(res), DRV_NAME)) { dev_err(&pdev->dev, "can't request region\n"); return -EIO; } return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Andres Salomon84100.00%1100.00%
Total84100.00%1100.00%


static int cs5535_mfd_res_disable(struct platform_device *pdev) { struct resource *res; res = platform_get_resource(pdev, IORESOURCE_IO, 0); if (!res) { dev_err(&pdev->dev, "can't fetch device resource info\n"); return -EIO; } release_region(res->start, resource_size(res)); return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Andres Salomon63100.00%1100.00%
Total63100.00%1100.00%

static struct resource cs5535_mfd_resources[NR_BARS]; static struct mfd_cell cs5535_mfd_cells[] = { { .id = SMB_BAR, .name = "cs5535-smb", .num_resources = 1, .resources = &cs5535_mfd_resources[SMB_BAR], }, { .id = GPIO_BAR, .name = "cs5535-gpio", .num_resources = 1, .resources = &cs5535_mfd_resources[GPIO_BAR], }, { .id = MFGPT_BAR, .name = "cs5535-mfgpt", .num_resources = 1, .resources = &cs5535_mfd_resources[MFGPT_BAR], }, { .id = PMS_BAR, .name = "cs5535-pms", .num_resources = 1, .resources = &cs5535_mfd_resources[PMS_BAR], .enable = cs5535_mfd_res_enable, .disable = cs5535_mfd_res_disable, }, { .id = ACPI_BAR, .name = "cs5535-acpi", .num_resources = 1, .resources = &cs5535_mfd_resources[ACPI_BAR], .enable = cs5535_mfd_res_enable, .disable = cs5535_mfd_res_disable, }, }; #ifdef CONFIG_OLPC
static void cs5535_clone_olpc_cells(void) { static const char *acpi_clones[] = { "olpc-xo1-pm-acpi", "olpc-xo1-sci-acpi" }; if (!machine_is_olpc()) return; mfd_clone_cell("cs5535-acpi", acpi_clones, ARRAY_SIZE(acpi_clones)); }

Contributors

PersonTokensPropCommitsCommitProp
Andres Salomon3690.00%133.33%
Daniel Drake37.50%133.33%
Lee Jones12.50%133.33%
Total40100.00%3100.00%

#else
static void cs5535_clone_olpc_cells(void) { }

Contributors

PersonTokensPropCommitsCommitProp
Andres Salomon7100.00%1100.00%
Total7100.00%1100.00%

#endif
static int cs5535_mfd_probe(struct pci_dev *pdev, const struct pci_device_id *id) { int err, i; err = pci_enable_device(pdev); if (err) return err; /* fill in IO range for each cell; subdrivers handle the region */ for (i = 0; i < ARRAY_SIZE(cs5535_mfd_cells); i++) { int bar = cs5535_mfd_cells[i].id; struct resource *r = &cs5535_mfd_resources[bar]; r->flags = IORESOURCE_IO; r->start = pci_resource_start(pdev, bar); r->end = pci_resource_end(pdev, bar); /* id is used for temporarily storing BAR; unset it now */ cs5535_mfd_cells[i].id = 0; } err = mfd_add_devices(&pdev->dev, -1, cs5535_mfd_cells, ARRAY_SIZE(cs5535_mfd_cells), NULL, 0, NULL); if (err) { dev_err(&pdev->dev, "MFD add devices failed: %d\n", err); goto err_disable; } cs5535_clone_olpc_cells(); dev_info(&pdev->dev, "%zu devices registered.\n", ARRAY_SIZE(cs5535_mfd_cells)); return 0; err_disable: pci_disable_device(pdev); return err; }

Contributors

PersonTokensPropCommitsCommitProp
Andres Salomon19098.96%375.00%
Mark Brown21.04%125.00%
Total192100.00%4100.00%


static void cs5535_mfd_remove(struct pci_dev *pdev) { mfd_remove_devices(&pdev->dev); pci_disable_device(pdev); }

Contributors

PersonTokensPropCommitsCommitProp
Andres Salomon24100.00%1100.00%
Total24100.00%1100.00%

static const struct pci_device_id cs5535_mfd_pci_tbl[] = { { PCI_DEVICE(PCI_VENDOR_ID_NS, PCI_DEVICE_ID_NS_CS5535_ISA) }, { PCI_DEVICE(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_CS5536_ISA) }, { 0, } }; MODULE_DEVICE_TABLE(pci, cs5535_mfd_pci_tbl); static struct pci_driver cs5535_mfd_driver = { .name = DRV_NAME, .id_table = cs5535_mfd_pci_tbl, .probe = cs5535_mfd_probe, .remove = cs5535_mfd_remove, }; module_pci_driver(cs5535_mfd_driver); MODULE_AUTHOR("Andres Salomon <dilinger@queued.net>"); MODULE_DESCRIPTION("MFD driver for CS5535/CS5536 southbridge's ISA PCI device"); MODULE_LICENSE("GPL");

Overall Contributors

PersonTokensPropCommitsCommitProp
Andres Salomon69497.20%436.36%
Jingoo Han60.84%19.09%
Bill Pemberton50.70%19.09%
Daniel Drake30.42%19.09%
Axel Lin20.28%19.09%
Mark Brown20.28%19.09%
Lee Jones10.14%19.09%
Christian Gmeiner10.14%19.09%
Total714100.00%11100.00%
Directory: drivers/mfd
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