mirror of
https://github.com/torvalds/linux.git
synced 2024-11-16 17:12:06 +00:00
99cd105975
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>
165 lines
3.8 KiB
C
165 lines
3.8 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
|
|
/*
|
|
* 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>
|
|
*/
|
|
|
|
#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 struct resource cs5535_mfd_resources[NR_BARS];
|
|
|
|
static struct mfd_cell cs5535_mfd_cells[] = {
|
|
{
|
|
.name = "cs5535-smb",
|
|
.num_resources = 1,
|
|
.resources = &cs5535_mfd_resources[SMB_BAR],
|
|
},
|
|
{
|
|
.name = "cs5535-gpio",
|
|
.num_resources = 1,
|
|
.resources = &cs5535_mfd_resources[GPIO_BAR],
|
|
},
|
|
{
|
|
.name = "cs5535-mfgpt",
|
|
.num_resources = 1,
|
|
.resources = &cs5535_mfd_resources[MFGPT_BAR],
|
|
},
|
|
{
|
|
.name = "cs5535-pms",
|
|
.num_resources = 1,
|
|
.resources = &cs5535_mfd_resources[PMS_BAR],
|
|
},
|
|
};
|
|
|
|
static struct mfd_cell cs5535_olpc_mfd_cells[] = {
|
|
{
|
|
.name = "olpc-xo1-pm-acpi",
|
|
.num_resources = 1,
|
|
.resources = &cs5535_mfd_resources[ACPI_BAR],
|
|
},
|
|
{
|
|
.name = "olpc-xo1-sci-acpi",
|
|
.num_resources = 1,
|
|
.resources = &cs5535_mfd_resources[ACPI_BAR],
|
|
},
|
|
};
|
|
|
|
static int cs5535_mfd_probe(struct pci_dev *pdev,
|
|
const struct pci_device_id *id)
|
|
{
|
|
int err, bar;
|
|
|
|
err = pci_enable_device(pdev);
|
|
if (err)
|
|
return err;
|
|
|
|
for (bar = 0; bar < NR_BARS; bar++) {
|
|
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);
|
|
}
|
|
|
|
err = pci_request_region(pdev, PMS_BAR, DRV_NAME);
|
|
if (err) {
|
|
dev_err(&pdev->dev, "Failed to request PMS_BAR's IO region\n");
|
|
goto err_disable;
|
|
}
|
|
|
|
err = mfd_add_devices(&pdev->dev, PLATFORM_DEVID_NONE, cs5535_mfd_cells,
|
|
ARRAY_SIZE(cs5535_mfd_cells), NULL, 0, NULL);
|
|
if (err) {
|
|
dev_err(&pdev->dev,
|
|
"Failed to add CS5535 sub-devices: %d\n", err);
|
|
goto err_release_pms;
|
|
}
|
|
|
|
if (machine_is_olpc()) {
|
|
err = pci_request_region(pdev, ACPI_BAR, DRV_NAME);
|
|
if (err) {
|
|
dev_err(&pdev->dev,
|
|
"Failed to request ACPI_BAR's IO region\n");
|
|
goto err_remove_devices;
|
|
}
|
|
|
|
err = mfd_add_devices(&pdev->dev, PLATFORM_DEVID_NONE,
|
|
cs5535_olpc_mfd_cells,
|
|
ARRAY_SIZE(cs5535_olpc_mfd_cells),
|
|
NULL, 0, NULL);
|
|
if (err) {
|
|
dev_err(&pdev->dev,
|
|
"Failed to add CS5535 OLPC sub-devices: %d\n",
|
|
err);
|
|
goto err_release_acpi;
|
|
}
|
|
}
|
|
|
|
dev_info(&pdev->dev, "%zu devices registered.\n",
|
|
ARRAY_SIZE(cs5535_mfd_cells));
|
|
|
|
return 0;
|
|
|
|
err_release_acpi:
|
|
pci_release_region(pdev, ACPI_BAR);
|
|
err_remove_devices:
|
|
mfd_remove_devices(&pdev->dev);
|
|
err_release_pms:
|
|
pci_release_region(pdev, PMS_BAR);
|
|
err_disable:
|
|
pci_disable_device(pdev);
|
|
return err;
|
|
}
|
|
|
|
static void cs5535_mfd_remove(struct pci_dev *pdev)
|
|
{
|
|
mfd_remove_devices(&pdev->dev);
|
|
|
|
if (machine_is_olpc())
|
|
pci_release_region(pdev, ACPI_BAR);
|
|
|
|
pci_release_region(pdev, PMS_BAR);
|
|
pci_disable_device(pdev);
|
|
}
|
|
|
|
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");
|