diff options
| author | Mike Turquette <mturquette@linaro.org> | 2013-04-11 22:31:37 +0400 |
|---|---|---|
| committer | Mike Turquette <mturquette@linaro.org> | 2013-04-12 22:23:24 +0400 |
| commit | f363e215931ecc8077b6f6ee6d39d9ffaf1c3bd0 (patch) | |
| tree | 737e5e9ccd32fc757d7435af3e0b0ba0b9cda7bf /drivers/clk | |
| parent | d3a1c7be8361e2fbb6affbdb19de47ca48d6c402 (diff) | |
| download | linux-f363e215931ecc8077b6f6ee6d39d9ffaf1c3bd0.tar.xz | |
clk: composite: allow fixed rates & fixed dividers
The composite clock assumes that any clock implementing the .recalc_rate
callback will also implement .round_rate and .set_rate. This is not
always true; the basic fixed-rate clock will only implement .recalc_rate
and a fixed-divider clock may choose to implement .recalc_rate and
.round_rate but not .set_rate.
Fix this by conditionally registering .round_rate and .set_rate
callbacks based on the rate_ops passed in to clk_composite_register.
Signed-off-by: Mike Turquette <mturquette@linaro.org>
Cc: Prashant Gaikwad <pgaikwad@nvidia.com>
Tested-by: Emilio López <emilio@elopez.com.ar>
Cc: Gregory CLEMENT <gregory.clement@free-electrons.com>
Diffstat (limited to 'drivers/clk')
| -rw-r--r-- | drivers/clk/clk-composite.c | 17 |
1 files changed, 13 insertions, 4 deletions
diff --git a/drivers/clk/clk-composite.c b/drivers/clk/clk-composite.c index 6f4728c6dbd1..a33f46f20a41 100644 --- a/drivers/clk/clk-composite.c +++ b/drivers/clk/clk-composite.c @@ -150,17 +150,26 @@ struct clk *clk_register_composite(struct device *dev, const char *name, } if (rate_hw && rate_ops) { - if (!rate_ops->recalc_rate || !rate_ops->round_rate || - !rate_ops->set_rate) { + if (!rate_ops->recalc_rate) { clk = ERR_PTR(-EINVAL); goto err; } + /* .round_rate is a prerequisite for .set_rate */ + if (rate_ops->round_rate) { + clk_composite_ops->round_rate = clk_composite_round_rate; + if (rate_ops->set_rate) { + clk_composite_ops->set_rate = clk_composite_set_rate; + } + } else { + WARN(rate_ops->set_rate, + "%s: missing round_rate op is required\n", + __func__); + } + composite->rate_hw = rate_hw; composite->rate_ops = rate_ops; clk_composite_ops->recalc_rate = clk_composite_recalc_rate; - clk_composite_ops->round_rate = clk_composite_round_rate; - clk_composite_ops->set_rate = clk_composite_set_rate; } if (gate_hw && gate_ops) { |