leandrof/linux
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

mfd: ab8500-sysctrl: Provide a platform specific pm_power_off() call-back

Browse Source 
The kernel allows us to specify a function call-back which will be
invoked when a system power-off request has been received. Here we
provide one which is to be used when shutting down AB8500 based
platforms.

Signed-off-by: Lee Jones <lee.jones@linaro.org>
This commit is contained in:
Lee Jones 2013-01-14 13:26:15 +00:00
parent 949db153b6
commit 379749c463
2 changed files with 24 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

22
drivers/mfd/ab8500-sysctrl.c
View File

@ -7,12 +7,29 @@
#include <linux/err.h> #include <linux/err.h>
#include <linux/module.h> #include <linux/module.h>
#include <linux/platform_device.h> #include <linux/platform_device.h>
#include <linux/pm.h>
#include <linux/signal.h>
#include <linux/mfd/abx500.h> #include <linux/mfd/abx500.h>
#include <linux/mfd/abx500/ab8500.h> #include <linux/mfd/abx500/ab8500.h>
#include <linux/mfd/abx500/ab8500-sysctrl.h> #include <linux/mfd/abx500/ab8500-sysctrl.h>
static struct device *sysctrl_dev; static struct device *sysctrl_dev;
void ab8500_power_off(void)
{
sigset_t old;
sigset_t all;
sigfillset(&all);
if (!sigprocmask(SIG_BLOCK, &all, &old)) {
(void)ab8500_sysctrl_set(AB8500_STW4500CTRL1,
AB8500_STW4500CTRL1_SWOFF |
AB8500_STW4500CTRL1_SWRESET4500N);
(void)sigprocmask(SIG_SETMASK, &old, NULL);
}
}
static inline bool valid_bank(u8 bank) static inline bool valid_bank(u8 bank)
{ {
return ((bank == AB8500_SYS_CTRL1_BLOCK) || return ((bank == AB8500_SYS_CTRL1_BLOCK) ||
@ -51,7 +68,12 @@ int ab8500_sysctrl_write(u16 reg, u8 mask, u8 value)
static int ab8500_sysctrl_probe(struct platform_device *pdev) static int ab8500_sysctrl_probe(struct platform_device *pdev)
{ {
struct ab8500_platform_data *plat;
sysctrl_dev = &pdev->dev; sysctrl_dev = &pdev->dev;
plat = dev_get_platdata(pdev->dev.parent);
if (plat->pm_power_off)
pm_power_off = ab8500_power_off;
return 0; return 0;
} }

2
include/linux/mfd/abx500/ab8500.h
View File

@ -274,6 +274,7 @@ struct ab8500_codec_platform_data;
/** /**
* struct ab8500_platform_data - AB8500 platform data * struct ab8500_platform_data - AB8500 platform data
* @irq_base: start of AB8500 IRQs, AB8500_NR_IRQS will be used * @irq_base: start of AB8500 IRQs, AB8500_NR_IRQS will be used
* @pm_power_off: Should machine pm power off hook be registered or not
* @init: board-specific initialization after detection of ab8500 * @init: board-specific initialization after detection of ab8500
* @num_regulator_reg_init: number of regulator init registers * @num_regulator_reg_init: number of regulator init registers
* @regulator_reg_init: regulator init registers * @regulator_reg_init: regulator init registers
@ -282,6 +283,7 @@ struct ab8500_codec_platform_data;
*/ */
struct ab8500_platform_data { struct ab8500_platform_data {
int irq_base; int irq_base;
bool pm_power_off;
void (*init) (struct ab8500 *); void (*init) (struct ab8500 *);
int num_regulator_reg_init; int num_regulator_reg_init;
struct ab8500_regulator_reg_init *regulator_reg_init; struct ab8500_regulator_reg_init *regulator_reg_init;