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authorHiroshi DOYU <Hiroshi.DOYU@nokia.com>2009-03-23 18:07:26 -0700
committerTony Lindgren <tony@atomide.com>2009-03-23 18:07:26 -0700
commitc75ee7520b4ad48a6948f51ca43b2e46ebd3696a (patch)
treeb3807d91e6bb892db8f35c4e18fd78293926df88 /arch/arm/mach-omap2
parentda8cfe03a461fe759041e7f130f96913b262aa6b (diff)
omap mailbox: add save_/restore_ctx() for PM
To preserve the registers during off-mode Signed-off-by: Hiroshi DOYU <Hiroshi.DOYU@nokia.com>
Diffstat (limited to 'arch/arm/mach-omap2')
-rw-r--r--arch/arm/mach-omap2/mailbox.c32
1 files changed, 32 insertions, 0 deletions
diff --git a/arch/arm/mach-omap2/mailbox.c b/arch/arm/mach-omap2/mailbox.c
index 0b8476ba95f..fd5b8a5925c 100644
--- a/arch/arm/mach-omap2/mailbox.c
+++ b/arch/arm/mach-omap2/mailbox.c
@@ -30,6 +30,9 @@
#define MAILBOX_IRQ_NEWMSG(u) (1 << (2 * (u)))
#define MAILBOX_IRQ_NOTFULL(u) (1 << (2 * (u) + 1))
+#define MBOX_REG_SIZE 0x120
+#define MBOX_NR_REGS (MBOX_REG_SIZE / sizeof(u32))
+
static void __iomem *mbox_base;
struct omap_mbox2_fifo {
@@ -45,6 +48,7 @@ struct omap_mbox2_priv {
unsigned long irqstatus;
u32 newmsg_bit;
u32 notfull_bit;
+ u32 ctx[MBOX_NR_REGS];
};
static struct clk *mbox_ick_handle;
@@ -165,6 +169,32 @@ static int omap2_mbox_is_irq(struct omap_mbox *mbox,
return (enable & status & bit);
}
+static void omap2_mbox_save_ctx(struct omap_mbox *mbox)
+{
+ int i;
+ struct omap_mbox2_priv *p = mbox->priv;
+
+ for (i = 0; i < MBOX_NR_REGS; i++) {
+ p->ctx[i] = mbox_read_reg(i * sizeof(u32));
+
+ dev_dbg(mbox->dev, "%s: [%02x] %08x\n", __func__,
+ i, p->ctx[i]);
+ }
+}
+
+static void omap2_mbox_restore_ctx(struct omap_mbox *mbox)
+{
+ int i;
+ struct omap_mbox2_priv *p = mbox->priv;
+
+ for (i = 0; i < MBOX_NR_REGS; i++) {
+ mbox_write_reg(p->ctx[i], i * sizeof(u32));
+
+ dev_dbg(mbox->dev, "%s: [%02x] %08x\n", __func__,
+ i, p->ctx[i]);
+ }
+}
+
static struct omap_mbox_ops omap2_mbox_ops = {
.type = OMAP_MBOX_TYPE2,
.startup = omap2_mbox_startup,
@@ -177,6 +207,8 @@ static struct omap_mbox_ops omap2_mbox_ops = {
.disable_irq = omap2_mbox_disable_irq,
.ack_irq = omap2_mbox_ack_irq,
.is_irq = omap2_mbox_is_irq,
+ .save_ctx = omap2_mbox_save_ctx,
+ .restore_ctx = omap2_mbox_restore_ctx,
};
/*