mfd: Add support for the RDC321x southbridge (e090d506) · Commits · 戴 / test

drivers/mfd/Kconfig

+9 −0

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		@@ -409,6 +409,15 @@ config LPC_SCH
		LPC bridge function of the Intel SCH provides support for
		System Management Bus and General Purpose I/O.

		config MFD_RDC321X
		tristate "Support for RDC-R321x southbridge"
		select MFD_CORE
		depends on PCI
		help
		Say yes here if you want to have support for the RDC R-321x SoC
		southbridge which provides access to GPIOs and Watchdog using the
		southbridge PCI device configuration space.

		endmenu

		menu "Multimedia Capabilities Port drivers"

drivers/mfd/Makefile

+2 −1

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		@@ -64,3 +64,4 @@ obj-$(CONFIG_AB4500_CORE) += ab4500-core.o
		obj-$(CONFIG_MFD_TIMBERDALE) += timberdale.o
		obj-$(CONFIG_PMIC_ADP5520) += adp5520.o
		obj-$(CONFIG_LPC_SCH) += lpc_sch.o
		obj-$(CONFIG_MFD_RDC321X) += rdc321x-southbridge.o

drivers/mfd/rdc321x-southbridge.c

0 → 100644

+123 −0

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		/*
		* RDC321x MFD southbrige driver
		*
		* Copyright (C) 2007-2010 Florian Fainelli <florian@openwrt.org>
		* Copyright (C) 2010 Bernhard Loos <bernhardloos@googlemail.com>
		*
		* This program is free software; you can redistribute it and/or modify
		* it under the terms of the GNU General Public License as published by
		* the Free Software Foundation; either version 2 of the License, or
		* (at your option) any later version.
		*
		* 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/init.h>
		#include <linux/module.h>
		#include <linux/kernel.h>
		#include <linux/platform_device.h>
		#include <linux/pci.h>
		#include <linux/mfd/core.h>
		#include <linux/mfd/rdc321x.h>

		static struct rdc321x_wdt_pdata rdc321x_wdt_pdata;

		static struct resource rdc321x_wdt_resource[] = {
		{
		.name = "wdt-reg",
		.start = RDC321X_WDT_CTRL,
		.end = RDC321X_WDT_CTRL + 0x3,
		.flags = IORESOURCE_MEM,
		}
		};

		static struct rdc321x_gpio_pdata rdc321x_gpio_pdata = {
		.max_gpios = RDC321X_MAX_GPIO,
		};

		static struct resource rdc321x_gpio_resources[] = {
		{
		.name = "gpio-reg1",
		.start = RDC321X_GPIO_CTRL_REG1,
		.end = RDC321X_GPIO_CTRL_REG1 + 0x7,
		.flags = IORESOURCE_MEM,
		}, {
		.name = "gpio-reg2",
		.start = RDC321X_GPIO_CTRL_REG2,
		.end = RDC321X_GPIO_CTRL_REG2 + 0x7,
		.flags = IORESOURCE_MEM,
		}
		};

		static struct mfd_cell rdc321x_sb_cells[] = {
		{
		.name = "rdc321x-wdt",
		.resources = rdc321x_wdt_resource,
		.num_resources = ARRAY_SIZE(rdc321x_wdt_resource),
		.driver_data = &rdc321x_wdt_pdata,
		}, {
		.name = "rdc321x-gpio",
		.resources = rdc321x_gpio_resources,
		.num_resources = ARRAY_SIZE(rdc321x_gpio_resources),
		.driver_data = &rdc321x_gpio_pdata,
		},
		};

		static int __devinit rdc321x_sb_probe(struct pci_dev *pdev,
		const struct pci_device_id *ent)
		{
		int err;

		err = pci_enable_device(pdev);
		if (err) {
		dev_err(&pdev->dev, "failed to enable device\n");
		return err;
		}

		rdc321x_gpio_pdata.sb_pdev = pdev;
		rdc321x_wdt_pdata.sb_pdev = pdev;

		return mfd_add_devices(&pdev->dev, -1,
		rdc321x_sb_cells, ARRAY_SIZE(rdc321x_sb_cells), NULL, 0);
		}

		static void __devexit rdc321x_sb_remove(struct pci_dev *pdev)
		{
		mfd_remove_devices(&pdev->dev);
		}

		static DEFINE_PCI_DEVICE_TABLE(rdc321x_sb_table) = {
		{ PCI_DEVICE(PCI_VENDOR_ID_RDC, PCI_DEVICE_ID_RDC_R6030) },
		{}
		};

		static struct pci_driver rdc321x_sb_driver = {
		.name = "RDC321x Southbridge",
		.id_table = rdc321x_sb_table,
		.probe = rdc321x_sb_probe,
		.remove = __devexit_p(rdc321x_sb_remove),
		};

		static int __init rdc321x_sb_init(void)
		{
		return pci_register_driver(&rdc321x_sb_driver);
		}

		static void __exit rdc321x_sb_exit(void)
		{
		pci_unregister_driver(&rdc321x_sb_driver);
		}

		module_init(rdc321x_sb_init);
		module_exit(rdc321x_sb_exit);

		MODULE_AUTHOR("Florian Fainelli <florian@openwrt.org>");
		MODULE_LICENSE("GPL");
		MODULE_DESCRIPTION("RDC R-321x MFD southbridge driver");

include/linux/mfd/rdc321x.h

0 → 100644

+26 −0

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		#ifndef __RDC321X_MFD_H
		#define __RDC321X_MFD_H

		#include <linux/types.h>
		#include <linux/pci.h>

		/* Offsets to be accessed in the southbridge PCI
		* device configuration register */
		#define RDC321X_WDT_CTRL 0x44
		#define RDC321X_GPIO_CTRL_REG1 0x48
		#define RDC321X_GPIO_DATA_REG1 0x4c
		#define RDC321X_GPIO_CTRL_REG2 0x84
		#define RDC321X_GPIO_DATA_REG2 0x88

		#define RDC321X_MAX_GPIO 58

		struct rdc321x_gpio_pdata {
		struct pci_dev *sb_pdev;
		unsigned max_gpios;
		};

		struct rdc321x_wdt_pdata {
		struct pci_dev *sb_pdev;
		};

		#endif /* __RDC321X_MFD_H */

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