Documentation/clk.txt has some handsome ASCII art outlining which
clk_ops are mandatory for a given clock, given the capability of the
hardware. Enforce those mandates with sanity checks in __clk_init.
Signed-off-by: Mike Turquette <mturque...@linaro.org>
Cc: Arnd Bergman <arnd.bergm...@linaro.org>
Cc: Olof Johansson <o...@lixom.net>
Cc: Russell King <li...@arm.linux.org.uk>
Cc: Sascha Hauer <s.ha...@pengutronix.de>
Cc: Shawn Guo <shawn....@freescale.com>
Cc: Richard Zhao <richard.z...@linaro.org>
Cc: Saravana Kannan <skan...@codeaurora.org>
Cc: Mark Brown <broo...@opensource.wolfsonmicro.com>
Cc: Andrew Lunn <and...@lunn.ch>
Cc: Rajendra Nayak <rna...@ti.com>
Cc: Viresh Kumar <viresh.ku...@st.com>
---
drivers/clk/clk.c | 14 ++++++++++++++
1 files changed, 14 insertions(+), 0 deletions(-)
diff --git a/drivers/clk/clk.c b/drivers/clk/clk.c
index d83a9e0..9924aec 100644
--- a/drivers/clk/clk.c
+++ b/drivers/clk/clk.c
@@ -1202,6 +1202,20 @@ void __clk_init(struct device *dev, struct clk *clk)
if (__clk_lookup(clk->name))
goto out;
+ /* check that clk_ops are sane. See Documentation/clk.txt */
+ if (clk->ops->set_rate &&
+ !(clk->ops->round_rate && clk->ops->recalc_rate)) {
+ pr_warning("%s: %s must implement .round_rate & .recalc_rate\n",
+ __func__, clk->name);
+ goto out;
+ }
+
+ if (clk->ops->set_parent && !clk->ops->get_parent) {
+ pr_warning("%s: %s must implement .get_parent & .set_parent\n",
+ __func__, clk->name);
+ goto out;
+ }
+
/* throw a WARN if any entries in parent_names are NULL */
for (i = 0; i < clk->num_parents; i++)
WARN(!clk->parent_names[i],
--
1.7.5.4
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