From f363e215931ecc8077b6f6ee6d39d9ffaf1c3bd0 Mon Sep 17 00:00:00 2001 From: Mike Turquette Date: Thu, 11 Apr 2013 11:31:37 -0700 Subject: clk: composite: allow fixed rates & fixed dividers MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit 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 Cc: Prashant Gaikwad Tested-by: Emilio López Cc: Gregory CLEMENT --- drivers/clk/clk-composite.c | 17 +++++++++++++---- 1 file changed, 13 insertions(+), 4 deletions(-) (limited to 'drivers/clk/clk-composite.c') 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) { -- cgit v1.2.3