[PATCH 07/12] clk: Fail duty cycle APIs after clk_hw is unregistered

Stephen Boyd
2024-08-15T00:55:25Z

The clk duty cycle APIs don't fail when a clk_hw is unregistered. Add a
nodrv clk_op that returns failure so that clk_set_duty_cycle() starts
failing after a clk_hw is unregistered.

Cc: Nuno Sá <nuno.sa@analog.com>
Fixes: 9fba738a53dd ("clk: add duty cycle support")
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
---
drivers/clk/clk.c | 6 ++++++
1 file changed, 6 insertions(+)

diff --git a/drivers/clk/clk.c b/drivers/clk/clk.c
index 8909294cc52e..a0c275e156ad 100644
--- a/drivers/clk/clk.c
+++ b/drivers/clk/clk.c
@@ -4518,6 +4518,11 @@ static int clk_nodrv_set_phase(struct clk_hw *hw, int degrees)
return -ENXIO;
}

+static int clk_nodrv_set_duty_cycle(struct clk_hw *hw, struct clk_duty *duty)
+{
+ return -ENXIO;
+}
+
static const struct clk_ops clk_nodrv_ops = {
.enable = clk_nodrv_prepare_enable_get_phase,
.disable = clk_nodrv_disable_unprepare,
@@ -4528,6 +4533,7 @@ static const struct clk_ops clk_nodrv_ops = {
.set_parent = clk_nodrv_set_parent,
.get_phase = clk_nodrv_prepare_enable_get_phase,
.set_phase = clk_nodrv_set_phase,
+ .set_duty_cycle = clk_nodrv_set_duty_cycle,
};

static void clk_core_evict_parent_cache_subtree(struct clk_core *root,