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sm501: add power control callback

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Add callback to get or set the power control if the device has the sleep
connected to some form of GPIO.

Signed-off-by: Ben Dooks <ben-linux@fluff.org>
Cc: Arnaud Patard <apatard@mandriva.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Ben Dooks 2008-07-25 01:45:58 -07:00 committed by Linus Torvalds
parent 717115e1a5
commit 472dba7d11
2 changed files with 38 additions and 0 deletions
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31
drivers/mfd/sm501.c
View File

@ -1138,8 +1138,31 @@ static int sm501_plat_probe(struct platform_device *dev)
}
#ifdef CONFIG_PM
/* power management support */
static void sm501_set_power(struct sm501_devdata *sm, int on)
{
struct sm501_platdata *pd = sm->platdata;
if (pd == NULL)
return;
if (pd->get_power) {
if (pd->get_power(sm->dev) == on) {
dev_dbg(sm->dev, "is already %d\n", on);
return;
}
}
if (pd->set_power) {
dev_dbg(sm->dev, "setting power to %d\n", on);
pd->set_power(sm->dev, on);
sm501_mdelay(sm, 10);
}
}
static int sm501_plat_suspend(struct platform_device *pdev, pm_message_t state)
{
struct sm501_devdata *sm = platform_get_drvdata(pdev);
@ -1148,6 +1171,12 @@ static int sm501_plat_suspend(struct platform_device *pdev, pm_message_t state)
sm->pm_misc = readl(sm->regs + SM501_MISC_CONTROL);
sm501_dump_regs(sm);
if (sm->platdata) {
if (sm->platdata->flags & SM501_FLAG_SUSPEND_OFF)
sm501_set_power(sm, 0);
}
return 0;
}
@ -1155,6 +1184,8 @@ static int sm501_plat_resume(struct platform_device *pdev)
{
struct sm501_devdata *sm = platform_get_drvdata(pdev);
sm501_set_power(sm, 1);
sm501_dump_regs(sm);
sm501_dump_gate(sm);
sm501_dump_clk(sm);

7
include/linux/sm501.h
View File

@ -157,6 +157,8 @@ struct sm501_init_gpio {
struct sm501_reg_init gpio_ddr_high;
};
#define SM501_FLAG_SUSPEND_OFF (1<<4)
/* sm501_platdata
*
* This is passed with the platform device to allow the board
@ -170,6 +172,11 @@ struct sm501_platdata {
struct sm501_init_gpio *init_gpiop;
struct sm501_platdata_fb *fb;
int flags;
int (*get_power)(struct device *dev);
int (*set_power)(struct device *dev, unsigned int on);
struct sm501_platdata_gpio_i2c *gpio_i2c;
unsigned int gpio_i2c_nr;
};