Commit f71e1afd authored by Andres Salomon's avatar Andres Salomon Committed by Samuel Ortiz
Browse files

mfd: Add cs5535-mfd driver for AMD Geode's CS5535/CS5536 support 



Add an MFD driver to handle the ISA device on CS5535 and CS5536
southbridges. This ISA bridge is actually multiple devices: GPIOs,
MFGPTs, etc.

Signed-off-by: default avatarAndres Salomon <dilinger@queued.net>
Signed-off-by: default avatarSamuel Ortiz <sameo@linux.intel.com>
parent e1b88eb0

drivers/mfd/Kconfig

+8 −0
Original line number Diff line number Diff line
@@ -537,6 +537,14 @@ config AB3550_CORE 
	  LEDs, vibrator, system power and temperature, power management

	  and ALSA sound.



config MFD_CS5535

	tristate "Support for CS5535 and CS5536 southbridge core functions"

	select MFD_CORE

	depends on PCI

	---help---

	  This is the core driver for CS5535/CS5536 MFD functions.  This is

          necessary for using the board's GPIO and MFGPT functionality.



config MFD_TIMBERDALE

	tristate "Support for the Timberdale FPGA"

	select MFD_CORE

drivers/mfd/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -82,3 +82,4 @@ obj-$(CONFIG_MFD_JZ4740_ADC) += jz4740-adc.o 
obj-$(CONFIG_MFD_TPS6586X)	+= tps6586x.o

obj-$(CONFIG_MFD_VX855)		+= vx855.o

obj-$(CONFIG_MFD_WL1273_CORE)	+= wl1273-core.o

obj-$(CONFIG_MFD_CS5535)	+= cs5535-mfd.o

drivers/mfd/cs5535-mfd.c

0 → 100644
+151 −0
Original line number Diff line number Diff line 
/*

 * 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/init.h>

#include <linux/mfd/core.h>

#include <linux/module.h>

#include <linux/pci.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 __devinitdata struct resource cs5535_mfd_resources[NR_BARS];



static __devinitdata 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],

	},

	{

		.id = ACPI_BAR,

		.name = "cs5535-acpi",

		.num_resources = 1,

		.resources = &cs5535_mfd_resources[ACPI_BAR],

	},

};



static int __devinit 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);

	if (err) {

		dev_err(&pdev->dev, "MFD add devices failed: %d\n", err);

		goto err_disable;

	}



	dev_info(&pdev->dev, "%d devices registered.\n",

			ARRAY_SIZE(cs5535_mfd_cells));



	return 0;



err_disable:

	pci_disable_device(pdev);

	return err;

}



static void __devexit cs5535_mfd_remove(struct pci_dev *pdev)

{

	mfd_remove_devices(&pdev->dev);

	pci_disable_device(pdev);

}



static 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_drv = {

	.name = DRV_NAME,

	.id_table = cs5535_mfd_pci_tbl,

	.probe = cs5535_mfd_probe,

	.remove = __devexit_p(cs5535_mfd_remove),

};



static int __init cs5535_mfd_init(void)

{

	return pci_register_driver(&cs5535_mfd_drv);

}



static void __exit cs5535_mfd_exit(void)

{

	pci_unregister_driver(&cs5535_mfd_drv);

}



module_init(cs5535_mfd_init);

module_exit(cs5535_mfd_exit);



MODULE_AUTHOR("Andres Salomon <dilinger@queued.net>");

MODULE_DESCRIPTION("MFD driver for CS5535/CS5536 southbridge's ISA PCI device");

MODULE_LICENSE("GPL");