81 lines
1.7 KiB
C
81 lines
1.7 KiB
C
|
/*
|
||
|
|
* Copyright (C) ST-Ericsson SA 2010
|
||
|
|
* Author: Mattias Nilsson <mattias.i.nilsson@stericsson.com> for ST Ericsson.
|
||
|
|
* License terms: GNU General Public License (GPL) version 2
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include <linux/err.h>
|
||
|
|
#include <linux/platform_device.h>
|
||
|
|
#include <linux/mfd/ab8500.h>
|
||
|
|
#include <linux/mfd/abx500.h>
|
||
|
|
#include <linux/mfd/ab8500/sysctrl.h>
|
||
|
|
|
||
|
|
static struct device *sysctrl_dev;
|
||
|
|
|
||
|
|
static inline bool valid_bank(u8 bank)
|
||
|
|
{
|
||
|
|
return ((bank == AB8500_SYS_CTRL1_BLOCK) ||
|
||
|
|
(bank == AB8500_SYS_CTRL2_BLOCK));
|
||
|
|
}
|
||
|
|
|
||
|
|
int ab8500_sysctrl_read(u16 reg, u8 *value)
|
||
|
|
{
|
||
|
|
u8 bank;
|
||
|
|
|
||
|
|
if (sysctrl_dev == NULL)
|
||
|
|
return -EAGAIN;
|
||
|
|
|
||
|
|
bank = (reg >> 8);
|
||
|
|
if (!valid_bank(bank))
|
||
|
|
return -EINVAL;
|
||
|
|
|
||
|
|
return abx500_get_register_interruptible(sysctrl_dev, bank,
|
||
|
|
(u8)(reg & 0xFF), value);
|
||
|
|
}
|
||
|
|
|
||
|
|
int ab8500_sysctrl_write(u16 reg, u8 mask, u8 value)
|
||
|
|
{
|
||
|
|
u8 bank;
|
||
|
|
|
||
|
|
if (sysctrl_dev == NULL)
|
||
|
|
return -EAGAIN;
|
||
|
|
|
||
|
|
bank = (reg >> 8);
|
||
|
|
if (!valid_bank(bank))
|
||
|
|
return -EINVAL;
|
||
|
|
|
||
|
|
return abx500_mask_and_set_register_interruptible(sysctrl_dev, bank,
|
||
|
|
(u8)(reg & 0xFF), mask, value);
|
||
|
|
}
|
||
|
|
|
||
|
|
static int __devinit ab8500_sysctrl_probe(struct platform_device *pdev)
|
||
|
|
{
|
||
|
|
sysctrl_dev = &pdev->dev;
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int __devexit ab8500_sysctrl_remove(struct platform_device *pdev)
|
||
|
|
{
|
||
|
|
sysctrl_dev = NULL;
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static struct platform_driver ab8500_sysctrl_driver = {
|
||
|
|
.driver = {
|
||
|
|
.name = "ab8500-sysctrl",
|
||
|
|
.owner = THIS_MODULE,
|
||
|
|
},
|
||
|
|
.probe = ab8500_sysctrl_probe,
|
||
|
|
.remove = __devexit_p(ab8500_sysctrl_remove),
|
||
|
|
};
|
||
|
|
|
||
|
|
static int __init ab8500_sysctrl_init(void)
|
||
|
|
{
|
||
|
|
return platform_driver_register(&ab8500_sysctrl_driver);
|
||
|
|
}
|
||
|
|
subsys_initcall(ab8500_sysctrl_init);
|
||
|
|
|
||
|
|
MODULE_AUTHOR("Mattias Nilsson <mattias.i.nilsson@stericsson.com");
|
||
|
|
MODULE_DESCRIPTION("AB8500 system control driver");
|
||
|
|
MODULE_LICENSE("GPL v2");
|