sm501: add power control callback
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>
diff --git a/drivers/mfd/sm501.c b/drivers/mfd/sm501.c
index e2530df..9296b267 100644
--- a/drivers/mfd/sm501.c
+++ b/drivers/mfd/sm501.c
@@ -1138,8 +1138,31 @@
}
#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 @@
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 @@
{
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);