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mfd: Add support for the RDC321x southbridge

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This patch adds a new MFD driver for the RDC321x southbridge. This southbridge
is always present in the RDC321x System-on-a-Chip and provides access to some
GPIOs as well as a watchdog. Access to these two functions is done using the
southbridge PCI device configuration space.

Signed-off-by: Florian Fainelli <florian@openwrt.org>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
This commit is contained in:
Florian Fainelli
2010-03-21 01:06:05 +01:00
committed by Samuel Ortiz
parent f322d5f009
commit e090d506c3
4 changed files with 160 additions and 1 deletions
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26
include/linux/mfd/rdc321x.h Normal file
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@@ -0,0 +1,26 @@
#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 */