linux/drivers/pinctrl/pinmux.h
Tony Lindgren b9130b776e pinctrl: add checks for empty function names
This is needed as otherwise we can get the following when
dealing with buggy data in a pinmux driver for
pinmux_search_function:

Unable to handle kernel NULL pointer dereference at virtual
address 00000000
...
PC is at strcmp+0xc/0x34
LR is at pinmux_get+0x350/0x8f4
...

As we need pctldev initialized to call ops->list_functions,
let's initialize it before check_ops calls and pass the
pctldev to the check_ops functions. Do this for both pinmux
and pinconf check_ops functions.

Signed-off-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2012-01-26 14:13:11 +01:00

47 lines
1.1 KiB
C

/*
* Internal interface between the core pin control system and the
* pinmux portions
*
* Copyright (C) 2011 ST-Ericsson SA
* Written on behalf of Linaro for ST-Ericsson
* Based on bits of regulator core, gpio core and clk core
*
* Author: Linus Walleij <linus.walleij@linaro.org>
*
* License terms: GNU General Public License (GPL) version 2
*/
#ifdef CONFIG_PINMUX
int pinmux_check_ops(struct pinctrl_dev *pctldev);
void pinmux_init_device_debugfs(struct dentry *devroot,
struct pinctrl_dev *pctldev);
void pinmux_init_debugfs(struct dentry *subsys_root);
int pinmux_hog_maps(struct pinctrl_dev *pctldev);
void pinmux_unhog_maps(struct pinctrl_dev *pctldev);
#else
static inline int pinmux_check_ops(struct pinctrl_dev *pctldev)
{
return 0;
}
static inline void pinmux_init_device_debugfs(struct dentry *devroot,
struct pinctrl_dev *pctldev)
{
}
static inline void pinmux_init_debugfs(struct dentry *subsys_root)
{
}
static inline int pinmux_hog_maps(struct pinctrl_dev *pctldev)
{
return 0;
}
static inline void pinmux_unhog_maps(struct pinctrl_dev *pctldev)
{
}
#endif