diff options
| author | Soren Brinkmann <soren.brinkmann@xilinx.com> | 2013-04-02 15:36:56 -0700 |
|---|---|---|
| committer | Mike Turquette <mturquette@linaro.org> | 2013-04-03 12:56:30 -0700 |
| commit | 056b205316cc3dcf8a67cf813a26ff8a72bf3cb9 (patch) | |
| tree | 3d98f8d116d5e7541cf41eec72847b2d3673324a /drivers/clk/clk-divider.c | |
| parent | f640c0fad698c0e4b07e05373681d3681125d6af (diff) | |
| download | op-kernel-dev-056b205316cc3dcf8a67cf813a26ff8a72bf3cb9.zip op-kernel-dev-056b205316cc3dcf8a67cf813a26ff8a72bf3cb9.tar.gz | |
clk: divider: Introduce CLK_DIVIDER_ALLOW_ZERO flag
Dividers which have CLK_DIVIDER_ONE_BASED set have a redundant state,
being a divider value of zero. Some hardware implementations allow a
zero divider which simply doesn't alter the frequency. I.e. it acts like
a divide by one or bypassing the divider.
This flag is used to handle such HW in the clk-divider model.
Signed-off-by: Soren Brinkmann <soren.brinkmann@xilinx.com>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
Diffstat (limited to 'drivers/clk/clk-divider.c')
| -rw-r--r-- | drivers/clk/clk-divider.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/drivers/clk/clk-divider.c b/drivers/clk/clk-divider.c index 68b4021..6d96741 100644 --- a/drivers/clk/clk-divider.c +++ b/drivers/clk/clk-divider.c @@ -109,8 +109,9 @@ static unsigned long clk_divider_recalc_rate(struct clk_hw *hw, div = _get_div(divider, val); if (!div) { - WARN(1, "%s: Invalid divisor for clock %s\n", __func__, - __clk_get_name(hw->clk)); + WARN(!(divider->flags & CLK_DIVIDER_ALLOW_ZERO), + "%s: Zero divisor and CLK_DIVIDER_ALLOW_ZERO not set\n", + __clk_get_name(hw->clk)); return parent_rate; } |
