ARM: etm: Don't require clock control
If clk_get fail, assume the etb does not need a separate clock.
Change-Id: Ia0bf3f5391e94a60ea45876aa7afc8a88a7ec3bf
Signed-off-by: Arve Hjønnevåg <arve@android.com>
diff --git a/arch/arm/kernel/etm.c b/arch/arm/kernel/etm.c
index 36d20bd..bd295e8 100644
--- a/arch/arm/kernel/etm.c
+++ b/arch/arm/kernel/etm.c
@@ -362,13 +362,12 @@
if (ret)
goto out_unmap;
+ /* Get optional clock. Currently used to select clock source on omap3 */
t->emu_clk = clk_get(&dev->dev, "emu_src_ck");
- if (IS_ERR(t->emu_clk)) {
+ if (IS_ERR(t->emu_clk))
dev_dbg(&dev->dev, "Failed to obtain emu_src_ck.\n");
- return -EFAULT;
- }
-
- clk_enable(t->emu_clk);
+ else
+ clk_enable(t->emu_clk);
etb_unlock(t);
t->etb_bufsz = etb_readl(t, ETBR_DEPTH);
@@ -403,8 +402,10 @@
iounmap(t->etb_regs);
t->etb_regs = NULL;
- clk_disable(t->emu_clk);
- clk_put(t->emu_clk);
+ if (!IS_ERR(t->emu_clk)) {
+ clk_disable(t->emu_clk);
+ clk_put(t->emu_clk);
+ }
amba_release_regions(dev);