2024-02-14 18:33:37

by Cristian Marussi

Subject: [PATCH 7/7] clk: scmi: Support get/set duty_cycle operations

Provide the CLK framework callbacks related to get/set clock duty cycle if
the relared SCMI clock supports OEM extended configurations.

CC: Michael Turquette <[email protected]>
CC: Stephen Boyd <[email protected]>
CC: [email protected]
Signed-off-by: Cristian Marussi <[email protected]>
---
drivers/clk/clk-scmi.c | 45 ++++++++++++++++++++++++++++++++++++++++++
1 file changed, 45 insertions(+)

diff --git a/drivers/clk/clk-scmi.c b/drivers/clk/clk-scmi.c
index b91a0dbd2fe0..9d3b1e749226 100644
--- a/drivers/clk/clk-scmi.c
+++ b/drivers/clk/clk-scmi.c
@@ -158,6 +158,45 @@ static int scmi_clk_atomic_is_enabled(struct clk_hw *hw)
return !!enabled;
}

+static int scmi_clk_get_duty_cycle(struct clk_hw *hw, struct clk_duty *duty)
+{
+ int ret;
+ u32 val;
+ struct scmi_clk *clk = to_scmi_clk(hw);
+
+ ret = scmi_proto_clk_ops->config_oem_get(clk->ph, clk->id,
+ SCMI_CLOCK_CFG_DUTY_CYCLE,
+ &val, NULL, false);
+ if (!ret) {
+ duty->num = val;
+ duty->den = 100;
+ } else {
+ dev_warn(clk->dev,
+ "Failed to get duty cycle for clock ID %d\n", clk->id);
+ }
+
+ return ret;
+}
+
+static int scmi_clk_set_duty_cycle(struct clk_hw *hw, struct clk_duty *duty)
+{
+ int ret;
+ u32 val;
+ struct scmi_clk *clk = to_scmi_clk(hw);
+
+ /* SCMI OEM Duty Cycle is expressed as a percentage */
+ val = (duty->num * 100) / duty->den;
+ ret = scmi_proto_clk_ops->config_oem_set(clk->ph, clk->id,
+ SCMI_CLOCK_CFG_DUTY_CYCLE,
+ val, false);
+ if (ret)
+ dev_warn(clk->dev,
+ "Failed to set duty cycle(%u/%u) for clock ID %d\n",
+ duty->num, duty->den, clk->id);
+
+ return ret;
+}
+
static int scmi_clk_ops_init(struct device *dev, struct scmi_clk *sclk,
const struct clk_ops *scmi_ops)
{
@@ -256,6 +295,12 @@ scmi_clk_ops_alloc(struct scmi_clk *sclk, bool atomic_capable,
if (!ci->parent_ctrl_forbidden)
ops->set_parent = scmi_clk_set_parent;

+ /* Duty cycle */
+ if (ci->extended_config) {
+ ops->get_duty_cycle = scmi_clk_get_duty_cycle;
+ ops->set_duty_cycle = scmi_clk_set_duty_cycle;
+ }
+
return ops;
}

--
2.43.0

2024-02-22 05:45:02

by Stephen Boyd

Subject: Re: [PATCH 7/7] clk: scmi: Support get/set duty_cycle operations

Quoting Cristian Marussi (2024-02-14 10:30:06)
> Provide the CLK framework callbacks related to get/set clock duty cycle if
> the relared SCMI clock supports OEM extended configurations.
>
> CC: Michael Turquette <[email protected]>
> CC: Stephen Boyd <[email protected]>
> CC: [email protected]
> Signed-off-by: Cristian Marussi <[email protected]>
> ---

Acked-by: Stephen Boyd <[email protected]>