diff options
| author | Masahiro Yamada <yamada.masahiro@socionext.com> | 2016-02-09 20:19:14 +0900 |
|---|---|---|
| committer | Stephen Boyd <sboyd@codeaurora.org> | 2016-02-09 10:18:48 -0800 |
| commit | 2430a94d1e719b7b4af2a65b781a4c036eb22e64 (patch) | |
| tree | 0312dece02be7a3e52d651e8c07746d60291d56b /drivers/clk/clk.c | |
| parent | 66f5ce2538e06dd6d628e37bbd38c79631274c9f (diff) | |
| download | linux-2430a94d1e719b7b4af2a65b781a4c036eb22e64.tar.bz2 | |
clk: fix __clk_init_parent() for single parent clocks
Before commit b3d192d5121f ("clk: simplify __clk_init_parent()"),
__clk_init_parent() called .get_parent() only for multi-parent
clocks. That commit changed the behavior to call .get_parent()
if available even for single-parent clocks and root clocks.
It turned out a problem because there are some single-parent clocks
that implement .get_parent() callback and return non-zero index.
The SOCFPGA clock is the case; the commit broke the SOCFPGA boards.
To keep the original behavior, invoke .get_parent() only when
num_parents is greater than 1.
Fixes: b3d192d5121f ("clk: simplify __clk_init_parent()")
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Reported-by: Dinh Nguyen <dinguyen@opensource.altera.com>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Diffstat (limited to 'drivers/clk/clk.c')
| -rw-r--r-- | drivers/clk/clk.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/clk/clk.c b/drivers/clk/clk.c index cd8382c83f48..67cd2f116c3b 100644 --- a/drivers/clk/clk.c +++ b/drivers/clk/clk.c @@ -1662,7 +1662,7 @@ static struct clk_core *__clk_init_parent(struct clk_core *core) { u8 index = 0; - if (core->ops->get_parent) + if (core->num_parents > 1 && core->ops->get_parent) index = core->ops->get_parent(core->hw); return clk_core_get_parent_by_index(core, index); |